Entries |
Document | Title | Date |
20080236153 | Method for operating a multiple speed hydraulic motor - A method of operating a hydraulic motor. In one embodiment, the method includes measuring a temperature of hydraulic fluid associated with the hydraulic motor and comparing the measured temperature of the hydraulic fluid to a first temperature threshold. The method also includes controlling an operational state of one or more hydraulic motor functions based at least partially on the comparison of the measured temperature of the hydraulic fluid and the first temperature threshold. | 10-02-2008 |
20080264051 | Working Machine and a Method for Operating a Working Machine - A working machine including an internal combustion engine for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheels. The working machine further including at least one hydraulic pump in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine. The transmission line includes at least one electric machine for driving or braking the driving wheels, and/or for generating electric power for the at least one hydraulic pump. | 10-30-2008 |
20080295503 | Method for using the expanion of hydrogen and oxygen gases during Electrolysis to produce electricity by means of turning small DC generators - The present invention provides a method for making the production of hydrogen during electrolysis more efficient. By using the expansion of hydrogen and oxygen during electrolysis to produce electricity by turning air pressure wheels attached to DC generators, allows us to harvest the pressure the gases make in their sealed sections of the apparatus. By using the rising of the gas bubbles in the electrolytic solution to turn several small wheel attached to small DC generators, allows us to harvest power from their motion to the top of the apparatus. This invention does not alter the oxygen gas or hydrogen gas in any way, allowing both gases to be used or stored in their pure form. The energy gained by this method is directed back to the DC power source and makes the production of hydrogen and water more efficient by replacing electrical energy lost in the form of heat during electrolysis. | 12-04-2008 |
20080295504 | Method For Controlling a Hydraulic Cylinder in a Work Machine - A method is provided for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement in relation to a part of a vehicle, with the hydraulic cylinder being controlled by a hydraulic machine. The method includes the steps of detecting initiation of a movement of the implement that is such that the piston of the hydraulic cylinder is moved in a first direction, of driving the hydraulic machine in a first rotational direction, prior to the movement of the implement taking place, so that a line from the hydraulic machine is pressurized, which line is arranged to connect the hydraulic machine to the side of the cylinder toward which the piston will be moved during the movement of the implement. | 12-04-2008 |
20080295505 | Method for Springing a Movement of an Implement of a Work Machine - A method for springing a movement of an implement of a work machine during a movement of the work machine is provided, in which at least one hydraulic cylinder is connected to the implement for controlling its movements, comprising the steps of connecting a hydraulic machine to the hydraulic cylinder, and of controlling the hydraulic machine in response to a disturbance acting upon the implement during the movement of the work machine. | 12-04-2008 |
20090013681 | Energized Fluid Motor and Components - A motor comprising a least one piston slideable within a cylinder with a seal, a plurality of valves, means to determine the position of the valves and a head of the piston, means to select the ports in which to transfer energized fluid/exhaust in and out of the cylinder, and a scotch yoke. The cylinder comprising at least a first set of ports and a second set of ports. The ports disposed in a wall of the cylinder. The valves coupled and slideable to allow a selective transfer of an energized fluid in, and an exhaust out, of the cylinder via the ports. The scotch yoke operatively interacting with a crankshaft, the piston operatively connected to the scotch yoke such that, when the energized fluid moves the piston, torque is applied to the crankshaft, and the valves are repositioned to allow the energized fluid to enter the cylinder on the opposite side of the head of the piston and the exhaust to exit the cylinder. | 01-15-2009 |
20090094971 | SYSTEM AND APPARATUS TO SYNCHRONIZE A PLURALITY OF HYDRAULICALLY ACTUATED COMPONENTS - Applicants' teachings relate to a system and apparatus to synchronize a plurality of hydraulically actuated components. In various embodiments of applicants' teachings, for example, but not limited to, in an automotive vehicle lift rack, a system and apparatus are disclosed to synchronize the platforms of the lift so that they are coplanar, and in some embodiments, maintained in a generally level configuration. The system comprises a hydraulic fluid reservoir, and at least two hydraulically actuated components in fluid communication by a first fluid flow path with the hydraulic fluid reservoir. Moreover, in accordance with various embodiments of applicants' teachings, a discharge valve is provided, the discharge valve in selective fluid communication by a second fluid flow path with a hydraulic fluid reservoir and the hydraulically actuated components. Moreover, in accordance with various embodiments of applicants' teachings, the system further comprises a control unit responsive to relative displacement of the at least two hydraulically actuated components. The control unit to selectively control the discharge valve, so that in response to the relative displacement of the at least two hydraulically actuated components the control unit activates the discharge valve to allow at least a portion of the hydraulic fluid to flow away by the second fluid flow path from at least one of the hydraulically actuated components and to synchronize the hydraulically actuated components. | 04-16-2009 |
20090120083 | PROCESS FOR ELECTRO-HYDRAULIC CIRCUITS AND SYSTEMS INVOLVING EXCAVATOR BOOM-SWING POWER MANAGEMENT - A method of controlling an electro-hydraulic system having an engine driving a variable displacement pump, a hydraulic valve and a hydraulic actuator in order to achieve more efficient engine operation is disclosed. The pressures in the electro-hydraulic system are monitored and commands are received indicating the desired movement of the hydraulic actuator. Based on the pressure and the commands, the operation being performed by the machine is determined and the engine is set to an efficient setting for the particular segment of machine operation. | 05-14-2009 |
20090133393 | METHOD FOR OPERATING A HYDROPNEUMATIC DEVICE, AND HYDRAULIC FLUID PUMP FOR THE MAINTENANCE OF A HYDROPNEUMATIC DEVICE - A method is disclosed for operating a hydropneumatic device ( | 05-28-2009 |
20090133394 | Method for Controlling or Regulating the Air Pressure in a Compressed Air Supply Device - A method is provided for controlling and/or regulating the air pressure in a compressed air supply device for a utility vehicle. At least one pressure value in the compressed air supply device and/or in vehicle components connected to the compressed air supply device is recorded. A humidity value representing the humidity content in an air filter unit associated with the compressed air supply device is determined. A clutch connecting a drive to a compressor is opened. A discharge valve of the compressed air supply device is opened when the pressure value is above a predetermined minimum value and the humidity value exceeds a predetermined threshold value. The clutch is opened and the discharge valve remains closed when it is indicated that the clutch can be engaged, the pressure value reaches a predetermined cutting-off pressure, and the humidity value is below the predetermined threshold value. | 05-28-2009 |
20090193800 | SERVICE PACK TANDEM PUMP - In certain embodiments, a service pack includes an engine, a tandem pump system coupled to the engine, and a controller. The tandem pump system may include a first pump and a second pump in tandem with one another. The controller may be configured to enable the first pump at a first load condition associated with the engine, the second pump at a second load condition associated with the engine, and both the first and second pumps at a third load condition associated with the engine. The load conditions may correspond to engine loads, hydraulic loads, or other loads associated with the engine. For example, at a low hydraulic pressure, the controller may selectively operate both the first and second pumps, whereas the controller may selectively operate only the first pump or the second pump at high and medium hydraulic pressures, respectively. In this manner, the system can provide suitable flow without overloading the engine. | 08-06-2009 |
20090211239 | Pressure accumulator to establish sufficient power to handle and operate external equipment and use thereof - A pressure accumulator ( | 08-27-2009 |
20090241530 | Method of Operating a Fluid-Working Machine and a Fluid-Working Machine - The present invention provides a method of controlling a fluid working machine ( | 10-01-2009 |
20090241531 | Hydraulic control device for starting device - A hydraulic control device includes a first oil path; a second oil path; a third oil path; an engagement pressure generation unit; a signal pressure generation unit; and an internal pressure switching unit that switches between a non-reduced pressure state where locking occurs due to the signal pressure inputted and a source pressure is outputted unchanged as internal pressure to the first oil path, and a reduced pressure state where the signal pressure is not inputted and a hydraulic pressure is regulated to a constant pressure from the source pressure, based on a feedback pressure of the internal pressure and an urging force of a first urging unit, and outputted as the internal pressure to the first oil path. | 10-01-2009 |
20090255244 | Continuous fluid circuit electricity generating system - A continuous fluid circuit electricity generating system for producing relatively expensive electricity without polluting the atmosphere or consuming natural resources. A first turbine submerged in a source of water (e.g., a man-made tank or a naturally-occurring well or larger body of water) supplies water under pressure from the source to a water propulsion turbine. The water propulsion turbine has a rotatable shaft coupled to the shaft of a first generator of electricity and a set of hollow impeller arms coupled to and rotatable with the turbine shaft. The impeller arms of the water propulsion turbine are located in proximity to a rotatable driven rotor having a coupling sleeve surrounding the shaft of a second generator of electricity. Water moving through and expulsed from the hollow impeller arms causes the impeller arms, the shaft of the water propulsion turbine, and the shaft of the first generator to rotate in a first direction. The water expulsed from the hollow impeller arms strikes impact surfaces of the rotatable driven rotor to cause the driven rotor, the coupling sleeve of the driven rotor, and the shaft of the second generator to rotate in an opposite direction. The water which has been ejected from the impeller arms is then returned to the source for reuse. | 10-15-2009 |
20090255245 | HYDRAULIC SYSTEM INCLUDING PRIORITY BASED VALVE SEQUENCING - An exemplary hydraulic system includes a plurality of digital valves, each valve fluidly connectable to a corresponding hydraulic load. The digitals valves are operable to fluidly connect the corresponding hydraulic load to a pressure source. The hydraulic system further includes a digital controller operably connected to the plurality of digital valves. The digital controller is configured to assign a priority level so that it is associated with each of a plurality of hydraulic loads, and to formulate a pulse width modulated control signal based on the assigned priority levels. The digital controller transmits the control signal to the plurality of digital valves for controlling the operation of the valves. | 10-15-2009 |
20090255246 | HYDRAULIC SYSTEM INCLUDING OPEN LOOP AND CLOSED LOOP VALVE CONTROL SCHEMES - An exemplary hydraulic system includes a digital valve operable to fluidly connect a hydraulic load to a pressure supply. A digital controller is operably connected to the digital valve. The digital controller stores a target value of a hydraulic system operating parameter and is configured to formulate a pulse width modulated control signal based on the target value. The digital controller transmits the control signal to the digital valve for controlling the operation of the valve. | 10-15-2009 |
20090260352 | HYDRAULIC SYSTEM HAVING LOAD SENSING CAPABILITIES - An exemplary hydraulic system includes a digital valve operable to fluidly connect a hydraulic load to a pressure supply, and an orifice disposed in a flow path between the hydraulic load and the digital valve. A digital controller is operably connected to the digital valve. The digital controller stores a target pressure drop across the orifice and is configured to determine an actual pressure drop across the orifice and formulate a control signal based on the target pressure drop and the actual pressure drop. The controller transmits the control signal to the digital valve for controlling the operation of the valve. | 10-22-2009 |
20090266067 | ARRANGEMENT FOR OPERATING A HYDRAULIC DEVICE - A fluid system includes a controllable first pump unit for supplying fluid pressure to at least one implement; a prime mover arranged to supply a driving torque to the first pump The first pump unit is arranged to supply fluid pressure to the implement. The fluid system further includes a controllable second pump unit connected to a fluid accumulator. The prime mover is arranged to supply a driving torque to the second pump unit in order to accumulate fluid pressure in the accumulator during periods of low demand. Fluid pressure from the accumulator is arranged to drive the second pump unit to assist the prime mover during periods of high demand in order to supply an additional driving torque in excess of the available driving torque from the prime mover. | 10-29-2009 |
20090288406 | Drivetrain system having simultaneous displacement control - A drivetrain system for use in a mobile machine is disclosed. The drivetrain system may have a first rotary fluid actuator, a second rotary fluid actuator, an input device, and a controller in communication with the first rotary fluid actuator, the second rotary fluid actuator, and the input device. The controller may be configured to determine a desired change in an effective gear ratio of the drivetrain system, and determine a total displacement change associated with the first and second rotary fluid actuators that produces the desired change in the effective gear ratio. The controller may also be configured to compare the total displacement change to a threshold change level, affect simultaneous displacement changes in the first and second rotary fluid actuators when the total displacement change exceeds the threshold change level, and affect sequential displacement changes in the first and second rotary fluid actuators when the total displacement change is less than the threshold change level. | 11-26-2009 |
20090288407 | CONTROLLER FOR A MOTOR AND A METHOD OF CONTROLLING THE MOTOR - A pumping apparatus for a jetted-fluid system includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return. The pumping apparatus includes a motor coupled to the pump to operate the pump, a sensor connectable to the power source and configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor. The pumping apparatus also includes a microcontroller coupled to the sensor and the switch. The microcontroller is configured to generate a derivative value based on the signal, and to control the motor based on the derivative value. | 11-26-2009 |
20090293468 | SYSTEM AND METHOD OF CONTROLLING TORQUE OF PLURAL VARIABLE DISPLACEMENT HYDRAULIC PUMPS - A system and method of controlling torque of plural variable displacement hydraulic pumps in construction equipment are provided, which can control torque of the variable displacement hydraulic pumps so that the total amount of torque of the hydraulic pumps does not exceed the preset amount of torque by presetting the torque so that the engine does not stop even at maximum load of the hydraulic pumps or by presetting the speed of the engine or the used torque of the hydraulic pumps in consideration of the fuel economy or working speed. The system includes an engine, at least two variable displacement hydraulic pumps, hydraulic actuators, control levers generating manipulation signals, control lever sensing means detecting the manipulation amounts of the control levers, hydraulic pump pressure sensing means detecting load pressures of the hydraulic pumps, maximum torque setting means setting the total torque inputted to the hydraulic pumps, desired flow rate computing means computing flow rates of the hydraulic pumps, expected torque computing means computing expected torque values of the hydraulic pumps, torque distributing means distributing torque values of the hydraulic pumps, limited flow rate computing means computing the flow rates of the hydraulic pumps, and output means outputting control signals to regulators. | 12-03-2009 |
20090301073 | APPARATUS AND METHOD FOR ENERGY RECOVERY - An apparatus for energy recovery is provided. The apparatus comprises a hydrostatic machine and at least one hydraulic storage component. The hydraulic storage component is connected to the hydrostatic machine via a working line. A valve device is provided for influencing the volumetric flow in the working line between the hydraulic storage component and the hydrostatic machine. The valve device comprises a brake pressure regulating valve unit with a valve and a pilot valve unit which acts on the valve with a control pressure. The invention also relates to a method for controlling the apparatus for energy recovery. In order to store released energy, a required braking torque is determined by a control electronics system. The volume from the hydrostatic piston machine into the working line is increased and the pilot valve is actuated by the control electronics system such that the valve is moved towards its open position. | 12-10-2009 |
20090308062 | Hydraulic Steering System and Method - A hydraulic steering system has a steering linkage and an actuator actuating the steering linkage. Pressurized hydraulic fluid can be fed to the actuator and removed from the actuator through a return pipe. A device installed into the return pipe counteracts volume flow pulsations by damming up the hydraulic fluid return flow. The device dams up the hydraulic fluid only in the event of an occurrence of a volume flow pulsation. | 12-17-2009 |
20100000207 | Combined Gas and Liquid Pump - The present invention provides a combined gas and liquid pump ( | 01-07-2010 |
20100000208 | HYDRAULIC FLUID AND METHOD - There are provided hydraulic fluids comprising at least one phospholipid lubricant blended with one or more of a glycol, glycerol or a glycerol ester and having a water content of less than 10% by weight. Also provided are hydraulic systems and methods of using and manufacturing hydraulic fluids. | 01-07-2010 |
20100005794 | DRIVE SYSTEM AND ACTUATION METHOD - The present invention relates to a drive system ( | 01-14-2010 |
20100018194 | GEAR BOX FOR HYDRAULIC ENERGY RECOVERY - A hydraulic energy recovery and a mechanical drive system in one unit that also provides integral mounting of hydraulic pump/motors for primary drive, secondary drive, and pumps for cooling, lubrication, and low pressure systems along with a mounting position for a power take-off device. | 01-28-2010 |
20100024409 | CONTROL SYSTEM FOR VARIABLE DISPLACEMENT PUMP-MOTOR TYPE TRANSMISSION - A control system for a variable displacement pump-motor type transmission includes: a judging mechanism judging a fact that the discharging amount of any one of the variable displacement pump-motors is zero; and a speed change controller carrying out a control to disable one of the transmission mechanism to transmit the power from the prime mover to the output member by actuating a synchronizer, in case the judging mechanism judges that the discharging amount of the one of the pump-motors functioning to transmit the power from the prime mover to the output member through the one of the transmission mechanism is zero. The control system can carry out a speed change operation of a variable displacement pump-motor type transmission without raising the speed of the prime mover abruptly, by judging a fixed stage set by locking one of the pump-motors. | 02-04-2010 |
20100043417 | METHOD FOR DETERMINING A SETTING PARAMETER FOR A HYDROSTATIC DISPLACEMENT UNIT AND A CORRESPONDING SYSTEM - A method and a system for determining a setting parameter of a hydrostatic displacement unit is provided. In the method, a pressure value, a rotational speed value, and a torque value are determined. The setting parameter can be determined with use of the pressure value, rotational speed value, torque value of the setting parameter characteristic diagram, and a setting parameter characteristic diagram, which is an inverted efficiency characteristic diagram, which has at least pressure, rotational speed, and torque as input parameters. The system can include a system unit for determining a pressure value, a system unit for determining a rotational speed value, a system unit for determining a torque value, and a system unit for determining the setting parameter with use of the pressure value, rotational speed value, torque value, and a characteristic diagram, whereby the system for determining a setting parameter is formed so that during the determination of the setting parameter it can use as a characteristic diagram a setting parameter characteristic diagram, which is an inverted efficiency characteristic diagram or torque characteristic diagram, which has at least pressure, rotational speed, and torque as input parameters. | 02-25-2010 |
20100043418 | HYDRAULIC SYSTEM AND METHOD FOR CONTROL - A hydraulic system is disclosed having at least two hydraulic circuits. The disclosed system compares pressures between the hydraulic circuits and alters valve commands of the circuit associated with higher pressures in order to reduce overall system pressure. | 02-25-2010 |
20100050620 | Control system and method for braking a hydrostatic drive machine - A method of braking a hydrostatic drive machine includes steps of reducing a displacement of a pump of a hydrostatic drive system to a non-zero displacement, and increasing a displacement of a motor of the hydrostatic drive system to a displacement that is less than a maximum displacement. The method also includes a step of accelerating an engine of the hydrostatic drive system toward a desired engine speed range. | 03-04-2010 |
20100064674 | Energy Storage Bridge - The invention is an Energy Storage Bridge (ESB) consisting of air-tight steel pipes, which are used to store the compressed air as stored energy, also used as the load carrying structural elements of the bridge. The stored energy can be the unwanted grid power or the intermittent regenerated energy sources. When the energy is needed, the compressed air is released to convert back to electricity, or to make use of the compressed air to produce hot water during its compression cycle, and cool air at its decompression and expansion cycle when it absorbs heat- an air conditioning technology called Air Cycle Air Conditioning (ACAC) widely used in commercial aircraft. For sea-crossing bridges, because of their great lengths the bridge body volume is enormous, and because of their remoteness from populated areas, they suit well for mass energy storage attached to power plants. With safety measures built in the steel pipes, the ESB can be applied to city road bridges. Since these bridges are not far from populated areas, they can be used as small energy storage units that provide the nearby industrial and commercial complex as well as residential buildings hot water and compressed air for air-conditioning using ACAC technology. The process eliminates the conversion of compressed air back to electricity, but directly uses the compression and decompression cycles to supply hot water and cool air for air-conditioning to the nearby consumers. | 03-18-2010 |
20100089044 | DRIVE HAVING AN ENERGY STORAGE DEVICE AND METHOD FOR STORING KINETIC ENERGY - The invention relates to a drive ( | 04-15-2010 |
20100089045 | HYDRAULIC CONTROL CIRCUIT FOR CONSTRUCTION MACHINE - A hydraulic control circuit includes a hydraulic cylinder, a control valve, a recovery oil passage, a hydraulic pump, an engine rotation speed setting unit, a recovery control valve, and a controller that reduces an engine rotation speed to not more than a preset reduction control engine rotation speed when the load is lowered; and adjusts an increase or decrease in an opening amount of the recovery control valve in accordance with a level of the target rotation speed set by the engine rotation speed setting unit. | 04-15-2010 |
20100095661 | DRIVE SYSTEM AND METHOD FOR RECOVERING WASTE ENERGY FROM A VEHICLE - A drive system, including a torque converter with a housing arranged for connection to a combustion engine for a vehicle; and an air-operated motor, connected to the housing, for providing torque to the housing for the torque converter; or an air compressor, connected to the housing, for using torque from the housing to compress air. In one embodiment, the system includes a compressed air accumulator for providing compressed air to the air-operated motor; and a heat exchanger for transferring heat energy to compressed air provided to the air-operated motor from the accumulator. A drive system, including a combustion engine with a crankshaft; a plurality of pistons and cylinders for combusting fuel; and a cylinder and piston, the piston connected to the crankshaft. The system also includes a compressed gas accumulator for supplying compressed gas to the cylinder to operate the first piston to provide torque to the crankshaft. | 04-22-2010 |
20100107620 | Rotary flow control valve with energy recovery - A hydraulic circuit is provided having a hydraulic actuator and a flow control valve. The flow control valve has a pressure adjusting element fluidly coupled to the hydraulic actuator and situated to affect a pressure of fluid being directed to the hydraulic actuator. The flow control valve also has an energy directing element operatively coupled to the pressure adjusting element and situated to be driven by the pressure adjusting element when the pressure adjusting element is selectively throttling fluid being directed to the hydraulic actuator. | 05-06-2010 |
20100107621 | POWER CONVERSION - A wind energy converter | 05-06-2010 |
20100107622 | SYSTEM AND METHOD FOR PILOT-OPERATED HIGH PRESSURE VALVE - A system and method for operating a two-stage, high-pressure pumping system includes a low-pressure pump having an output configured to deliver a hydraulic fluid under a low-pressure at a high-volume to drive a tool associated with the two-stage, high-pressure, pumping system under low load conditions. The system also includes a high-pressure pump having an output configured to deliver the hydraulic fluid under a high-pressure at a low-volume to drive the tool under high load conditions. A pilot-operated device is included that is configured to selectively drive the tool with pressure from at least one of the output of the low-pressure pump and the output of the high-pressure pump. The pilot-operated device receives pilot pressure from the output of the low-pressure pump to control selectively driving the tool with the output of the two stage pump. | 05-06-2010 |
20100107623 | HYDRAULIC SYSTEM HAVING AN EXTERNAL PRESSURE COMPENSATOR - A hydraulic system for a machine is disclosed. The hydraulic system has a source of pressurized fluid and a fluid actuator with a first chamber. The hydraulic system also has a first valve configured to selectively fluidly communicate the source with the first chamber. The first valve further includes a first element movable between a flow passing, at which fluid from the source flows to the first chamber, and a flow blocking position, at which fluid from the source is blocked from the first chamber and a second element configured to selectively drain a control passageway associated with the first element to cause the first element to move. The hydraulic system further has a proportional pressure compensating valve configured to control a pressure of a fluid directed between the source and the first valve dependent upon the pressure of the control passageway. | 05-06-2010 |
20100115935 | Apparatus for generating energy from tides - An apparatus for generating energy during both rising and falling tides, the apparatus comprising a housing defining an enclosure, at least one opening to the enclosure at a bottom portion thereof, and air passageway having a plenum at either end thereof, each plenum having an opening to the enclosure and an opening to the passageway along with a moveable member to close one of the inlet and outlet such that air will pass through a turbine mounted in the air passageway. | 05-13-2010 |
20100115936 | SYSTEM AND METHOD FOR PUMP-CONTROLLED CYLINDER CUSHIONING - A system and method for controlling the movement of an implement of an earthmoving machine. The system includes a hydraulic actuator adapted to move the implement. A variable displacement pump is coupled to the actuator for delivering a pressurized fluid to and receiving pressurized fluid from chambers within the actuator. A sensor generates an output based on the position of the actuator's piston or piston rod, and a controller controls the displacement of the variable displacement pump in response to the output of the sensor by executing an algorithm to reduce the flow rate of the fluid to and from the actuator's chambers and thereby reduce the velocity of the piston as it approaches an end of a piston stroke thereof and prevent the piston from impacting the actuator at the end of the piston stroke. | 05-13-2010 |
20100126160 | METHOD FOR CONVERTING A FLUCTUATING AND/OR ERRATIC ENERGY SUPPLY INTO A STABLE ENERGY SOURCE - In a method for converting fluctuating energy into a stable energy supply, the fluctuating energy is derived from the group of solar energy, wind power, waves or water currents, this energy being delivered to a first pump being integrated in a pressure circuit for delivering stable energy and the pressure circuit comprising a pressure amplifier with a double-cone device being driven by the liquid flow circulated by the first pump. This allows the stabilisation of fluctuating energy to be used e.g. in desalination plants without supplemental storage energy and without reverting to electric current conversion. | 05-27-2010 |
20100132349 | HYDRAULIC DRIVE, IN PARTICULAR FOR MACHINE TOOLS, AND METHOD FOR CONTROLLING THE HYDRAULIC DRIVE - The invention relates to a hydraulic drive, especially for a press, punching or nibbling machine,
| 06-03-2010 |
20100132350 | ELECTRIC ACTUATOR - An object of the present invention is to provide an electric actuator having a structure capable of reducing an external force or impact acting on a screw shaft when a piston rod is at a stretched position. | 06-03-2010 |
20100132351 | INTEGRATED ENGINE WELDER AND HYDRAULIC PUMP - An integrated welder, generator and hydraulic unit that includes a housing that at least partially contains components of a welder, generator and a hydraulic pump. An engine, an electric current generator, and a hydraulic pump are at least partially mounted in the housing. The electric current generator is at least partially connected to the engine to be at least partially driven thereby. The hydraulic pump can be at least partially powered by the electric current generator or the fuel powered engine during the operation of the engine. The integrated welder, generator and hydraulic unit can also include an air compressor. | 06-03-2010 |
20100146958 | SYSTEM FOR CONTROLLING A HYDRAULIC SYSTEM - A method of operating a hydraulic system is disclosed. The method includes holding an implement configuration in an orientation. The method also includes sensing a pressure within a chamber of a hydraulic actuator associated with the implement configuration when the implement configuration is in the orientation and comparing a first signal indicative of the first sensed pressure with a first pressure value. The method further includes selecting a first functional relationship from among a plurality of stored functional relationships if the first signal is greater than the first pressure value and selecting a second functional relationship from among the plurality of stored functional relationships if the first signal is less than the first pressure value. The method includes controlling the hydraulic actuator based on the selected functional relationship. | 06-17-2010 |
20100154399 | METHOD FOR RECUPERATING POTENTIAL ENERGY DURING A LOWERING OPERATION OF A LOAD - method is provided for recuperating potential energy during a lowering operation of a load, wherein a hydraulic system is adapted to lift and lower the load. In the method, at least two energy recuperation modes are provided, one of the modes is selected in response to a current operating state, and the hydraulic system is controlled according to the selected mode | 06-24-2010 |
20100154400 | HYDRAULIC CONTROL SYSTEM UTILIZING FEED-FOWARD CONTROL - The present disclosure is directed toward a hydraulic control system. The system may have a pump and a tool actuator configured to move a tool with a flow of pressurized fluid provided by the pump. The system may further have a tool control valve configured to control the flow of pressurized fluid to the tool actuator. The system may also have a controller operably connected with the tool control valve and the pump. The controller may be configured to receive a tool movement request. The controller may further be configured to estimate a change in a flow demand across the tool control valve associated with the tool movement request. The controller may also be configured to command adjustment of a discharge flow rate of the pump based on the estimated change in flow demand to satisfy the tool movement request. | 06-24-2010 |
20100162693 | METHOD OF REDUCING TORQUE RIPPLE IN HYDRAULIC MOTORS - Torque Ripple is reduced in hydraulic system by operating with a hydraulic fluid having a VI of at least 130. | 07-01-2010 |
20100162694 | DEPALLETING UNLOADING CONVEYOR - The invention describes a depalleting device ( | 07-01-2010 |
20100180585 | HYDRAULIC SYSTEM THERMAL CONTRACTION COMPENSATION APPARATUS AND METHOD - An apparatus for compensating for fluid contraction in a hydraulic powered telescoping boom may include a monitor determining the elevation angle of the telescoping boom, a supply of hydraulic fluid, and a fluid control responsive to the monitor. The fluid control provides the hydraulic fluid from the supply to a hydraulic cylinder controlling extension of the telescoping boom when the elevation angle exceeds a predetermined threshold angle to compensate for thermal contraction of hydraulic fluid and thus prevent uncommanded boom retraction. A method in accordance with the invention is also disclosed. | 07-22-2010 |
20100186401 | METHOD AND HYDRAULIC CONTROL SYSTEM FOR SUPPLYING PRESSURE MEDIUM TO AT LEAST ONE HYDRAULIC CONSUMER - The invention relates to a hydraulic control arrangement and to a method for controlling a hydraulic consumer that comprises a pressure chamber on the input side and on the return side, said pressure chamber being connected to an adjusting pump or a tank via a valve device. The valve device is controlled by means of a control unit via which it can be adjusted in a regeneration mode, in which both pressure chambers are connected to the adjusting pump. According to the invention, the adjusting pump is pressure controlled, whereby in the regeneration mode, it is automatically switched to the normal operation in which the supply side of the pressure chamber is connected to the adjusting pump and the return side of the pressure chamber is connected to the tank when the pumping rate falls below the demand for the pressure medium. | 07-29-2010 |
20100192561 | ADAPTIVE, LOW-IMPACT VEHICLE ENERGY HARVESTER - An adaptive, low-impact vehicle energy harvester system, and a method of harvesting vehicle energy, is provided. The system includes a plurality of channels disposed longitudinally in a trafficway, wherein each of the plurality of channels includes one or more compressible, elongated hollow bodies such that a movement of a vehicle along the trafficway causes contents in the elongated hollow bodies to be expelled from one end, a motor in communication with the hollow bodies such that the contents expelled from one end of the hollow bodies actuate the motor, and a control unit that varies a resistance to the movement of the contents in the elongated hollow bodies based on at least one of a mass of the vehicle, a velocity of the vehicle, and a rate of change of velocity of the vehicle. | 08-05-2010 |
20100192562 | CONTROL SYSTEM AND METHOD FOR CONTROLLING AT LEAST TWO HYDRAULIC CONSUMERS - The invention relates to a control arrangement and a method for controlling at least two hydraulic consumers. According to the invention, when a pre-determined maximum load pressure of one of the consumers is exceeded, the pump is controlled according to the pressure medium requirement of the other consumer having a lower load. | 08-05-2010 |
20100199652 | Multistage Hydraulic Gas Compression/Expansion Systems and Methods - Multistage hydraulic systems and methods for converting the potential energy of a pressurized gas, particularly air, into mechanical work when operating in motor, and for producing compressed gas from the mechanical work of the rotating shaft when rotating when operating in compressor mode, by performing a successive expansion/compression of the said gas. Each of the systems comprises: a multistage Compression-Expansion Unit made of several hydraulic Compression-Expansion Modules having different capacity and integrating a gas/liquid separating heat exchanger, designed to convert pressure power into a hydraulic power and vice-versa, by performing an essentially isothermal compression/expansion of the gas; a single stage or multistage, direct or indirect, external forced-air Heat Exchanger for maintaining the active liquid at ambient temperature; and a multi-circuit, multi-displacement Hydraulic Motor/Pump for converting hydraulic power into mechanical power and vice-versa. | 08-12-2010 |
20100199653 | HYDRAULIC SYSTEM FOR SYNCHRONIZING A PLURALITY OF PISTONS AND AN ASSOCIATED METHOD - A hydraulic system for use with a pressurized fluid includes a first cylinder and a second cylinder. A flow path links the first and second cylinders in fluid communication with each other. A first piston is disposed within the first cylinder and defines a first axis and a second piston disposed within the second cylinder. The first piston is movable along the first axis between a variety of operating positions and a rephasing position. The first piston has an exterior surface that defines a peripheral groove and several flutes. The flutes are oriented such that they are parallel to the first axis and intersect the peripheral groove, allowing the fluid to flow from the first cylinder across the flow path and into the second cylinder when the first piston is in the rephasing position thereby automatically rephasing the first and second pistons within the hydraulic system. | 08-12-2010 |
20100212305 | COUNTERBALANCING ARRANGEMENT - A counterbalancing arrangement and a method for counterbalancing two mutually movable parts, which is arranged to counteract the gravitational force of at least one of the movable parts. The counterbalancing arrangement includes a gas spring and a compressor system. The compressor system is designed to sense a pressure in the gas spring and to adjust the pressure if the pressure deviates from a predetermined value. The counterbalancing arrangement can be used for counterbalancing an industrial robot arm and is capable of maintaining its working capacity regardless of any gas leakage and variations in the ambient temperature so as to result in very few unwanted stops occasioned by a need for servicing the balancing spring of the counterbalancing arrangement. | 08-26-2010 |
20100212306 | Hydraulic Drive System And Diagnostic Control Strategy For Improved Operation - A method and apparatus are provided for hydraulic fluid supply between a hydraulic pump and a hydraulic drive unit, switching hydraulic fluid flow direction to the hydraulic drive unit or stopping hydraulic fluid flow to the hydraulic drive unit when measured hydraulic fluid pressure crosses a predetermined pressure threshold value. The method further comprises calculating an amount of mechanical work done by the hydraulic drive unit and warning an operator or limiting hydraulic fluid flow rate to the hydraulic drive unit when the calculated mechanical work for the drive cycle is less than an expected amount of mechanical work. The apparatus for practicing the method further includes a pressure sensor associated with a hydraulic fluid supply conduit between the pump and the drive unit, and an electronic controller programmed to operate the drive system according to the method. | 08-26-2010 |
20100218492 | COMPRESSED GAS-DRIVEN DEVICE WITH PASSIVE THERMODYNAMIC COMPOSITION - The present invention is directed generally to a system and method which employ a compressed gas-driven device with a passive thermodynamic composition. Certain embodiments provide a compressed gas-driven (e.g., CO | 09-02-2010 |
20100242464 | LOAD SENSING SYSTEM, WORKING MACHINE COMPRISING THE SYSTEM, AND METHOD FOR CONTROLLING A HYDRAULIC FUNCTION - A load sensing system includes a first assembly of actuators for controlling a first hydraulic function, a pump adapted to supply the actuators with pressurized hydraulic fluid, an electrically controlled valve adapted to control the output pressure of the pump via a hydraulic signal, a first pressure sensor for detecting a load pressure of the first actuator assembly, and a control unit adapted to receive a signal with information about the load pressure detected by the first pressure sensor and to generate a control signal, corresponding to the detected load pressure, to the electrically controlled valve. | 09-30-2010 |
20100242465 | Shock Absorbing Fluidic Actuator - A fluidic actuator and a control system for the fluidic actuator are described. A first component of the actuator may have two openings interconnected by a passageway. A second component may be moveably housed within the passageway and divide the passageway into two portions. A fluid delivery system may be connected to the two openings. The fluid delivery system may supply a first pressure of fluid to the first portion of the passageway causing the second component to move within the passageway at a first speed. When the second component is in a selected position within the passageway, the fluid delivery system may reduce the pressure of the fluid, causing a reduction in speed of the second component. The fluidic actuator may be used in a wafer processing system. | 09-30-2010 |
20100242466 | Force transmission device with a rotational speed adaptive damper and method for improving the damping properties - The invention relates to a force transmission device for power transmission between an input and an output, comprising at least an input and an output, and a vibration damping device disposed in a cavity that can be filled at least partially with an operating medium, in particular oil, the vibration damping device coupled with a rotational speed adaptive absorber, wherein the rotational speed adaptive absorber is tuned as a function of an oil influence to an effective order q | 09-30-2010 |
20100257852 | Vacuum Accumulator System and Method for Regenerative Braking System - A vacuum accumulator system includes a booster, a vacuum accumulator disposed in fluid communication with the booster and an engine disposed in fluid communication with the vacuum accumulator. | 10-14-2010 |
20100257853 | PROTECTION VALVE FOR HYDRAULIC DRIVE SYSTEM - A protection valve for a hydraulic drive system and a method for protecting the hydraulic drive system and pumping equipment driven by the hydraulic drive system includes a valve body, an actuator shaft movably disposed within the valve body, a thermal actuator for displacing the actuator shaft between an un-actuated position and an actuated position, and a poppet attached to the actuator shaft for movement therewith. The thermal actuator is configured to displace the actuator shaft between the un-actuated position and the actuated position in response to a hydraulic oil temperature that exceeds a predetermined maximum. A thermal actuator body is rigidly attached to the valve body at one end and a valve seat body is rigidly attached to the valve body at the other end. The thermal actuator body has openings formed therein for placing hydraulic oil in fluid communication with the thermal actuator. | 10-14-2010 |
20100275589 | Electro-Hydraulic Auxiliary Mode Control - A work machine ( | 11-04-2010 |
20100281857 | System and Method of Maintaining Pressure of a Hydraulic Motor - A system and method of maintaining pressure of a hydraulic motor is disclosed. The system includes a plurality of pistons disposed about a periphery of a flywheel, wherein each piston is compressed by a roller during each revolution of the flywheel. As each piston is engaged and pushes against the roller, the piston is forced inward and forces hydraulic fluid out of the cylinder adding pressure to the system to run the hydraulic motor. In addition, the piston pushing against the roller causes the flywheel to continue to rotate. As the force acting on the piston causes the flywheel to rotate, the next piston starts to approach the position of the prior piston. This action continues as long as the fluid is under pressure when it enters each cylinder. | 11-11-2010 |
20100281858 | REGENERATIVE SUSPENSION WITH ACCUMULATOR SYSTEMS AND METHODS - In exemplary embodiments, a regenerative suspension system replaces or complements a standard shock absorber on a vehicle. A pump attaches via a hose to a central accumulator cylinder that is mounted on a vehicle. Pressurized fluid, air, or other material charges the accumulator. The Pressurized fluid, air, or other material is controllably released via a valve in order to perform work. | 11-11-2010 |
20100287921 | Hydraulic Function Auto-Control Mode Deactivation - A work machine ( | 11-18-2010 |
20100287922 | Hybrid hydraulic drive system with accumulator as the frame of vehicle - A hybrid hydraulic power transmission system for all terrestrial's vehicles comprises a prime mover and an accumulator which could also be used as the main load bearing full or partial frame for all those vehicles. A hydraulic power integrator is operatively connected to the prime mover and the accumulator and selectively able to draw power for the vehicle from the prime mover, the accumulator, or a combination thereof. | 11-18-2010 |
20100293933 | METHOD FOR AUTOMATICALLY DETERMINING THE CONDITION OF A HYDRAULIC AGGREGATE - A hydraulic aggregate for supplying a hydraulic cylinder in consecutive load strokes is monitored for its working load in order to determine the condition of the aggregate automatically. For this purpose, the time integral of the pressure is determined for each load stroke. The pressure and duration are processed into a characteristic number which indicates the wear. This makes it possible to diagnose the condition of the hydraulic aggregate at any time. | 11-25-2010 |
20100319335 | HYDRAULIC SYSTEM - The present invention relates to a hydraulic system with a feed pump for feeding hydraulic fluid, wherein the feed pump is driven by a hydraulic drive motor. The invention furthermore comprises a method for feeding hydraulic fluid into a hydraulic system via a feed pump, wherein the feed pump is driven by a hydraulic drive motor. | 12-23-2010 |
20100326063 | METHODS AND APPARATUS TO CHARGE ACCUMULATOR APPARATUS - Methods and apparatus to charge accumulators are described. An example system to charge an accumulator apparatus includes a piston disposed within a housing to define a first chamber adjacent a first side of the piston and a second chamber adjacent a second side of the piston. A fill probe having a body and a passageway between a first end of the fill probe and a second end of the fill probe removably couples to the piston to fluidly couple to the passageway of the fill probe to the second chamber of the housing when the accumulator is in a charging condition. A valve is fluidly coupled to the piston to enable fluid flow to the second chamber of the housing via the piston when the fill probe is coupled to the piston. | 12-30-2010 |
20100326064 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 12-30-2010 |
20100326065 | HYDRAULIC POWER TRANSMISSION SYSTEM FOR A MINERAL MATERIAL PROCESSING PLANT, A METHOD FOR CONTROLLING THE SAME, A SCREENING MACHINE AND A CRUSHING MACHINE - Hydraulic transmission system for a mineral material processing plant, which transmission system comprises at least two hydraulic first motors, which are arranged to drive at least one conveyor belonging to the mineral material processing plant, at least two first directional valves connected via the first actuator channels of the directional valves to each of the first motors, a hydraulic pump arranged to transfer hydraulic fluid via the first actuator channels of the directional valves to the first motors. The system also comprises pressure sensors. The first directional valves are valves that can be adjusted by external control during the running of the processing plant and which are arranged to control the volume flow of the hydraulic fluid supplied into the first motors. The control is made on the basis of the pressure of hydraulic fluid measured by pressure sensors in the first actuator channels the directional valves. | 12-30-2010 |
20100326066 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 12-30-2010 |
20110000202 | ACTIVE HYDRAULIC REGENERATION FOR MOTION CONTROL - A hydraulic system including a hydraulic power source ( | 01-06-2011 |
20110000203 | HYDRAULIC SYSTEM HAVING MULTIPLE ACTUATORS AND AN ASSOCIATED CONTROL METHOD - A hydraulic system, and associated method of control, includes an operator input device, a source of hydraulic fluid flow, and a plurality of actuators. At least one valve associated with each actuator for controlling a flow of fluid to and from the actuator. A controller is responsive to a signal from the operator input device to calculate a hydraulic pressure to be supplied to each of the actuators. The controller controls the source of hydraulic fluid flow and the valves for powering the actuators with the calculated hydraulic pressure. The controller also monitors a sensed parameter to determine whether the actuators can be powered with the calculated hydraulic pressure, and in response to a determination that the actuators cannot be powered with the calculated hydraulic pressure, calculates a discrepancy ratio and modifies actuation of the actuators with the discrepancy ratio. | 01-06-2011 |
20110005214 | Hydraulic system - A hydraulic system for actuating a motor vehicle transmission by a control hydraulic power source that includes a control hydraulic pump for providing a high hydraulic pressure, a control pressure accumulator, and a low-pressure hydraulic pump for providing low-pressure volumetric flow of hydraulic fluid for operating a low-pressure hydraulic component. The low-pressure pump is operatively drivingly connected with the control hydraulic pump that is connected in a charged manner with the control pressure accumulator and with a transmission actuator. | 01-13-2011 |
20110011072 | MOBILE ENERGY RECOVERY APPARATUS AND METHOD - An energy recovery apparatus and method for recovering and harvesting energy from passing air is disclosed. Energy recovery and harvesting from passing air is accomplished by creating a pressure differential using high and low pressure ports. The energy represented by the pressure differential is extracted using a mass airfoil device which, in turn, is used to create alternative forms of energy which, in turn, is used to support auxiliary and main systems aboard any moving object or form of transport. | 01-20-2011 |
20110030359 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 02-10-2011 |
20110056192 | TECHNIQUE FOR CONTROLLING PUMPS IN A HYDRAULIC SYSTEM - A hydraulic system includes a plurality of pumps that provide pressurized fluid to a plurality of hydraulic actuators some of which work more that others. That system is controlled by producing a usage value for each of the plurality of pumps which indicates an amount that the respective pump has worked. One of the pumps is assigned to each hydraulic actuator in response to the usage values. The pumps with lower usage values are assigned to hydraulic actuators which work more, so as to equalize the use of each pump. The assignment of pumps to hydraulic actuators changes with changes in the usage values for the plurality of pumps. When a given one of the plurality of hydraulic actuators is to operate, hydraulic fluid is routed from the assigned pump to that given one of the plurality of hydraulic actuators. | 03-10-2011 |
20110061375 | Hydraulic Drive System - A hydraulic drive system for an actuator uses a pair of pressure compensated hydraulic machines to control flow to and from the drive chambers of the actuator by varying the controlled pressure of one of the machines. The machines are mechanically coupled to permit energy recovery and charge an accumulator to store supplies energy. The drive system may be combined with other services including a transmission for incorporation in a vehicle. The transmission uses a pressure compensated supply and torque control of the wheels. | 03-17-2011 |
20110072809 | HYDRAULIC SYSTEM AND METHOD FOR CONTROL - A hydraulic system is disclosed having at least two hydraulic circuits. The disclosed system apportions flow between the two hydraulic circuits based on an assumed flow rate that is held constant in both power-limited and non-power-limited conditions. | 03-31-2011 |
20110079006 | METHOD AND APPARATUS FOR CONTROLLING A VARIABLE DISPLACEMENT HYDRAULIC PUMP - A control system for a variable displacement hydraulic pump is disclosed. The control system utilizes two flow control valves to provide a flow of hydraulic fluid to two control actuators. The control actuators create opposing moments on the pump swashplate to control swashplate orientation and pump displacement. | 04-07-2011 |
20110094212 | COMPRESSED AIR ENERGY STORAGE SYSTEM WITH REVERSIBLE COMPRESSOR-EXPANDER UNIT - A system and method for compressing and expanding air in a compressed air energy storage (CAES) system is disclosed. A CAES system is provided that is alternately operable in a compression mode and an expansion mode and includes therein a motor-generator unit and a drive shaft connected to the motor-generator unit that is configured to transmit rotational power to and from the motor-generator unit. The CAES system also includes at least one reversible compressor-expander unit coupled to the drive shaft and configured to selectively compress and expand air, and an air storage unit connected to the reversible compressor-expander unit and configured to store compressed air received therefrom, with the at least one reversible compressor-expander unit compressing air during the compression mode and expanding air during the expansion mode. | 04-28-2011 |
20110094213 | METHOD AND APPARATUS FOR CONTROLLING A PUMP - An electro-hydraulic control system for pump control is disclosed. The hydraulic actuator is configured to control the inclination of a swashplate. The position of the hydraulic actuator is controlled by controlling the flow of pressurized fluid into and out of two pressure chambers, one on either side of the actuator. A fluid passageway is provided that selectively connects the passageway to tank. The passageway has an orifice for each pressure chamber, and the actuator is configured to selectively block all or a portion of one or more of the orifices, depending on the position of the actuator. The components of the control system are configured such that the actuator will return to a neutral or near-neutral position upon loss of electric power. | 04-28-2011 |
20110107754 | HYDRAULIC HYBRID TRANSMISSION RETARD DEVICE - A retard device ( | 05-12-2011 |
20110120107 | ENERGY STORAGE SYSTEM INCLUDING PRESSURIZED RESERVOIR - An energy storage system includes a reservoir defining an interior chamber, a collapsible bladder positioned within the interior chamber and having working fluid therein, a one-way valve in fluid communication with the interior chamber and operable to permit entry of replacement air into the interior chamber as working fluid exits the bladder, a reversible pump/motor in fluid communication with the bladder, and an accumulator containing working fluid and gas. The accumulator is in selective fluid communication with the reversible pump/motor to deliver pressurized working fluid to the reversible pump/motor when operating as a motor, and to receive pressurized working fluid discharged by the reversible pump/motor when operating as a pump. | 05-26-2011 |
20110131964 | SHAPE MEMORY ALLOY POWERED HYDRAULIC ACCUMULATOR - A system, in certain embodiments, includes an accumulator. The accumulator includes a first cylinder configured to receive a fluid within an internal volume of the first cylinder. The accumulator also includes a piston configured to move axially within the first cylinder. Axial movement of the piston within the first cylinder adjusts the internal volume of the first cylinder. The accumulator further includes a plurality of shape memory alloy wires configured to cause the axial movement of the piston within the first cylinder. | 06-09-2011 |
20110138796 | Method of activating a mountable hydraulic appliance, and such mountable hydraulic appliance, in particular for demolition, comminution or recycling - The invention relates to a method of activating a mountable hydraulic appliance, and to such mountable hydraulic appliance for the shearing or crushing of structures, in particular for demolition, comminution or recycling, said appliance having an upper jaw and a lower jaw at least one of which is pivotally hinged on a bearing axis arranged on the housing, the hinged jaw being activated by a first hydraulic cylinder and by at least one further hydraulic cylinder acting thereon so as to be moved from an open position to a cutting position and/or a closed position and vice versa, the hydraulic cylinders which act upon the hinged jaw being either pressurised simultaneously, or the initiation of a closing movement of the at least one hinged jaw from an open position being such that initially only one hydraulic cylinder is pressurised and, as the required compression force increases during the closing movement, the at least one further hydraulic cylinder is equally pressurised. | 06-16-2011 |
20110173963 | LOW SPEED HYDRAULIC CONTROL FOR FINE CONTROL OF HYDRAULIC CRANES - The present disclosure provides embodiments directed towards a method and a system for fine control of hydraulic cranes. In one embodiment, a system is provided. The system includes a service pack having an engine. The engine has an operating speed ranging from a low speed to a high speed, a hydraulic pump coupled to the engine, wherein the hydraulic pump is configured to supply a hydraulic output to a hydraulic load, and a control system configured to control the hydraulic output. The control system includes a fine control mode configured to lock the engine in the low speed and control the hydraulic output in proportion to a percentage of a trigger activation. | 07-21-2011 |
20110179781 | HYDRAULIC DRIVE SYSTEM FOR USE IN DRIVEN SYSTEMS - A hydraulic drive system for use in driving a power generator has a hydraulic pump having an input for rotationally driving the hydraulic pump, a flow control valve in fluid communication with the hydraulic pump, a hydraulic motor having a first output and a second output coupled to a hydraulic fluid source, and a pressure regulator positioned intermediate the flow control valve and the hydraulic motor. The pressure regulator is in fluid communication with the hydraulic motor and the flow control valve, and maintains a hydraulic pressure at its input that is higher than at its output to prevent the hydraulic system from stalling. The system further comprises a power generator having an input shaft rotationally coupled to the hydraulic motor first output. | 07-28-2011 |
20110185717 | HYDRAULIC MANIFOLD PUMP - A hydraulic manifold pump comprising a housing in which is located a first hydraulic circuit and a second hydraulic circuit. A bidirectional motor connectable to the first hydraulic circuit and the second hydraulic circuit, the bidirectional motor being able to activate the first hydraulic circuit when operable in a first direction, and being able to activate the second hydraulic circuit when operable in a second direction. The hydraulic manifold pump further compromises a hydraulic actuator having two hydraulic chambers being connectable to the first hydraulic circuit and to the second hydraulic circuit, and both the first and second hydraulic circuits being connected to and able to vent into a fluid reservoir. | 08-04-2011 |
20110209469 | SYSTEM AND METHOD TO RECAPTURE ENERGY OF A HYDRAULIC MOTOR - A system and method to recapture energy of a hydraulic motor is disclosed. The system includes a plurality of pistons disposed about a periphery of a flywheel, wherein each piston is compressed by a roller during each revolution of the flywheel. As each piston is engaged and pushes against the roller, the piston is biased inward and forces hydraulic fluid out of the cylinder recapturing energy as pressure to the system when the flywheel is rotating under its own rotational inertia. In addition, the piston pushing against the roller causes the flywheel to continue to rotate. As the force acting on the piston causes the flywheel to rotate, the next piston starts to approach the position of the prior piston. This action continues as long as the fluid is under pressure when it enters each cylinder. | 09-01-2011 |
20110214420 | DIAGNOSIS MANAGEMENT SYSTEM AND DIAGNOSIS MANAGEMENT METHOD FOR A VALVE-CONTROLLED HYDROSTATIC DISPLACEMENT UNIT - A diagnosis management system for a hydrostatic displacement unit, including a control unit for controlling a drive motor, a hybrid control unit for controlling the motor control unit on the basis of at least one desired acceleration signal and one desired deceleration signal for the drive motor, a gear control unit for controlling the motor control unit on the basis of at least signals derived from a continuously variable gear, and a control unit for a digital displacement unit, for controlling at least one pump motor as the digital displacement unit is disclosed. The control unit for a digital displacement unit has at least one diagnostic interface, which detects operating values and/or operating states in order to detect system errors in the pump motor, a sensor unit portion associated with the pump motor, and/or a power electronics portion associated with the pump motor; and at least one calculation portion, which preprocesses the operating values and/or operating states detected by the diagnostic interface. The at least one diagnostic interface and the at least one calculation portion are disposed for operating in a first system direction for diagnosis and for determining a correction of incident system errors, and in a second system direction for diagnosis and/or for performing the correction of incident system errors. A diagnosis management method can be performed by the diagnosis management system. | 09-08-2011 |
20110219759 | Single-Axis Drive System and Method - A system for moving an object in one axis that creates highly dispersed but precisely controlled mechanical force to support, manipulate, and maintain an object, tool or application in precise alignment or orientation with respect to a stationary or moving target is disclosed. The system includes one or more fluid containers within a cylindrical enclosure or drum, and a shaft running through longitudinal axis of the drum. The shaft is coupled to the drum by rotating assemblies so that the drum may rotate around the shaft or the draft may rotate inside the drum. The fluid inflatable containers are arranged in a inside the drum around the shaft so that each container exerts expansive force between a vane fixed to the drum and a vane fixed to the shaft. A volume of the fluid may be placed in the one or more fluid containers by control systems. By changing the volume of fluid in the one or more containers, forces are exerted on the vanes and the object is moved. | 09-15-2011 |
20110247321 | DYNAMIC SUPPORT APPARATUS AND SYSTEM - A dynamic support system includes a control system for controlling inflation and deflation of at least one actuator having an inlet connectable to the a control unit of the dynamic support system. The control unit may be in communication with a sensor and may control inflation and deflation of the at least one actuator in response to information provided by the sensor. | 10-13-2011 |
20110271666 | MULTISTAGE LIQUEFIED GAS EXPANDER WITH VARIABLE GEOMETRY HYDRAULIC STAGES - Embodiments are directed to an expander having two or more hydraulic stages with different physical geometries. In an embodiment, a first hydraulic stage uses nozzle vanes machined with a first geometry, while a second hydraulic stage uses nozzle vanes machined with a second geometry. Different nozzle vanes can be combined to tune the performance of the expander as the optimal operating conditions change. In yet another embodiment, an expander is equipped with a generator having a double wound stator with two sets of parallel windings. For high operating loads greater than a threshold, a first set of windings operates while a second set of windings, operating at a lower frequency, is disconnected. For operating loads that are less than the threshold, the first set of windings is disconnected and the second set of windings operates, enabling the generator to continue to operate close to 100% load for less expander power. | 11-10-2011 |
20110271667 | HYDRAULIC DRIVE DEVICE HAVING TWO PRESSURE CHAMBERS AND METHOD FOR OPERATING A HYDRAULIC DRIVE DEVICE HAVING TWO PRESSURE CHAMBERS - The invention relates to a hydraulic drive device, comprising a piston which is guided displaceably in a cylinder chamber along a working axis and adjoins a working pressure chamber that can be pressurized by hydraulic fluid, and comprising a control means that is guided in the piston at least in some sections between different control states in order to control the flow of the hydraulic fluid from a high pressure supply into the working pressure chamber to move the piston in the working direction and from the working pressure chamber to a return flow chamber, wherein the region of the piston facing away from the working pressure chamber delimits a low pressure chamber that is pressurized by a low pressure supply for hydraulic fluid during the operation of the device such that the piston is moved back against the working direction when the control means connects the working pressure chamber to the return flow chamber. The invention furthermore relates to a method for operating a hydraulic drive device. | 11-10-2011 |
20110277456 | HYDRAULICALLY-POWERED COMPRESSOR - Apparatus and method for processing a process fluid at a remote location, with the apparatus including a pump located at a first location and configured to provide a pressurized working fluid. The apparatus also includes an umbilical coupled to the pump such that the umbilical receives the pressurized working fluid from the pump and transports the pressurized working fluid therefrom. The apparatus further includes a hydraulic turbine disposed at the remote location and coupled to the umbilical such that the hydraulic turbine receives the pressurized working fluid from the umbilical. The apparatus additionally includes one or more shaft energy conversion devices operatively coupled to the hydraulic turbine and disposed at the remote location. | 11-17-2011 |
20110283690 | HEAT EXCHANGE WITH COMPRESSED GAS IN ENERGY-STORAGE SYSTEMS - In various embodiments, compressed-gas energy storage and recovery systems include a cylinder assembly for compression and/or expansion of gas, a reservoir for storage and/or supply of compressed gas, and a system for thermally conditioning gas within the reservoir. | 11-24-2011 |
20110283691 | MULTIPLE FLUID PUMP COMBINATION CIRCUIT - A method of combining outputs of a plurality of fluid pumps includes receiving an input signal from an input device. The input signal is adapted to control a function of a work vehicle. An actuation signal is sent to a first direction control device of a first actuator assembly. The first actuator assembly is in selective fluid communication with a first pump assembly. A position of a second direction control valve of a second actuator assembly is received. The second actuator assembly is in selective fluid communication with a second pump assembly. A selector valve that is in fluid communication with a cavity of a poppet valve assembly is actuated so that the second pump assembly is in fluid communication with the first actuator assembly when the second direction control valve is in a neutral position. | 11-24-2011 |
20110289908 | HYDRAULIC SYSTEM HAVING IMPLEMENT AND STEERING FLOW SHARING - A hydraulic system for a machine is disclosed. The hydraulic system may have a first pump with variable displacement and being load-sense controlled, and a first hydraulic circuit associated with the first pump. The hydraulic system may also have a second pump with variable displacement and being electro-hydraulically controlled, and a second hydraulic circuit associated with the second pump. The hydraulic system may further have a flow-sharing valve arrangement configured to selectively share fluid flow between the first and second hydraulic circuits. | 12-01-2011 |
20110296822 | EFFICIENCY OF LIQUID HEAT EXCHANGE IN COMPRESSED-GAS ENERGY STORAGE SYSTEMS - In various embodiments, efficiency of energy storage and recovery systems employing compressed air and liquid heat exchange is improved via control of the system operation and/or the properties of the heat-exchange liquid. | 12-08-2011 |
20110308241 | COMPRESSED AIR ENGINE - An air engine system includes a motor coupled to the drive shaft of an air engine to control the speed of the air engine. The air engine uses compressed air from a compressed air source provided by an air compressor. The air engine may be used on a vehicle, providing a clean environmentally-friendly means of locomotion. Conventional internal combustion engines may be retrofitted to operate on compressed air. Many of the parts on an internal combustion engine are not needed after retrofitting to be an air engine, including the heads. The heads are replaced by head plates that are coupled to solenoids that provide both intake and exhaust functions to the cylinders, thereby replacing the valves in the heads. A kit provides parts and instructions for retrofitting an existing internal combustion engine to run on compressed air. | 12-22-2011 |
20110308242 | COMMAND BASED METHOD FOR ALLOCATING FLUID FLOW FROM A PLURALITY OF PUMPS TO MULTIPLE HYDRAULIC FUNCTIONS - Fluid from two pumps is allocated to a plurality of hydraulic actuators based on a plurality of flow commands, each specifying a desired amount of flow to be applied to a different hydraulic actuator. For a given hydraulic actuator, the allocation involves (1) determining an apportionment of the desired amount of flow, if no other hydraulic actuator is active, and (2) altering the apportionment in response to all the plurality of flow commands, and (3) using the altered apportionment to determine a first amount of the flow for one pump to provide and a second amount of the flow for the other pump to provide. The process is repeated for all the hydraulic actuators. Supply valves for each hydraulic actuator are controlled by the associated first and second amounts and each pump is controlled in response to either the first or second amounts for all the hydraulic actuators. | 12-22-2011 |
20120006013 | HIGH-EFFICIENCY ENERGY-CONVERSION BASED ON FLUID EXPANSION AND COMPRESSION - In various embodiments, motor-pump efficiency is increased by limiting the fluid pressure communicated to the motor-pump to a range smaller than that communicated by other components of an energy storage and/or recovery system. | 01-12-2012 |
20120017577 | HYDRAULIC SOFT START SYSTEM - A hydraulic soft-start system includes a first flow valve in fluid communication with a pressure source and an inlet of a motor. A first restricting orifice is disposed between the first valve and the inlet. A second flow valve is in fluid communication with the first valve and the inlet. A pilot for actuating the second valve is in fluid communication with the inlet. A second restricting orifice is disposed between the pilot and the inlet. Upon actuation of the first valve, a first flow is passed from the pressure source via the first orifice to the inlet, placing the motor in a partially-actuated state. The second valve being actuated after a threshold pressure of the pilot is reached allowing a second flow to pass from the pressure source to the inlet. The second flow being higher than the first flow, thereby placing the motor in a fully-actuated state. | 01-26-2012 |
20120023918 | FLUID WORKING MACHINE AND METHOD OF OPERATING A FLUID WORKING MACHINE - A fluid working machine comprises a working chamber of cyclically varying volume, a high pressure manifold, and an actuated high pressure valve for regulating the flow of fluid between the working chamber and the high pressure manifold. The actuated high pressure valve comprises a moveable valve member, operable between a closed position and at least one open position. A controllable opening mechanism provides an active urging force to urge the moveable valve member from the said closed position towards at least one said open position, the volume of the working chamber varying between a maximum volume and a minimum volume. The controllable opening mechanism provides the active urging force more than once while the volume of the working chamber is intermediate the maximum of chamber volume and the minimum of chamber volume. | 02-02-2012 |
20120031086 | SYSTEMS AND METHODS FOR SELECTIVELY DISENGAGING A CLUTCH TO PROTECT ENGINES FROM DAMAGE - Embodiments of the present invention are generally related to methods and devices for use with vehicles that include a clutch, a transmission, a slave cylinder, a master cylinder and an engine. In accordance with an embodiment, a device includes a primary piston configured to urge hydraulic fluid into a slave cylinder, when the primary piston is moved from a first position to a second position, to thereby disengage the clutch from the transmission. The primary piston is normally movable from the first position to the second position by hydraulic actuation of a master cylinder. A secondary piston is configured to selectively apply force to the primary piston, to move the primary piston from the first position to the second position, when the secondary piston is selectively actuated. The secondary piston can be selectively actuated by a secondary fluid, such as a compressed gas. Methods and devices are used to selectively disengage the clutch from the transmission when an operating condition that can be damaging to the engine is detected. | 02-09-2012 |
20120042642 | Method for Predefining a Rotational Speed of a Drive Machine of a Drive System - A method for predefining a rotational speed of a drive machine of a drive system is disclosed. The method involves at least the drive machine and a hydrostatic drive unit, wherein the rotational speed which is to be predefined for the drive machine is determined as a function of an instantaneous system state and a predicted system state of the drive system. | 02-23-2012 |
20120055144 | METHOD FOR OPERATING A HYDRAULIC HYBRID VEHICLE - The invention relates to a method for operating a hydraulic hybrid vehicle ( | 03-08-2012 |
20120055145 | SYSTEMS AND METHODS FOR OPTIMIZING THERMAL EFFICIENCEY OF A COMPRESSED AIR ENERGY STORAGE SYSTEM - Systems, methods and devices for optimizing thermal efficiency within a gas compression system are described herein. In some embodiments, a device can include a first hydraulic cylinder, a second hydraulic cylinder, and a hydraulic actuator. The first hydraulic cylinder has a first working piston disposed therein for reciprocating movement in the first hydraulic cylinder and which divides the first hydraulic cylinder into a first hydraulic chamber and a second hydraulic chamber. The second hydraulic cylinder has a second working piston disposed therein for reciprocating movement in the second hydraulic cylinder and which divides the second hydraulic cylinder into a third hydraulic chamber and a fourth hydraulic chamber. The hydraulic actuator can be coupled to the first or second working piston, and is operable to move the first and second working pistons in a first direction and a second direction such that volume in the hydraulic chambers are reduced accordingly. | 03-08-2012 |
20120055146 | Drive train device - In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second operating fluid pressure source connected in at least one operating state directly to the working fluid pressure system, and a lubricating and cooling fluid pressure system with an operating fluid pressure deviating from the operating fluid pressure in the working fluid pressure system, a hydraulic switching unit is provided which in at least one operating state connects the second operating fluid pressure source directly to the lubricating and cooling fluid pressure system for increasing the pressure thereof. | 03-08-2012 |
20120067036 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 03-22-2012 |
20120090307 | ELECTRIC CIRCUIT WITH SPEED CONTROL AND DIODE SEPARATION FOR USE WITH AN ELECTRICALLY ACTUATABLE MECHANISM - An electric circuit with speed control and diode separation for use with an electrically actuatable mechanism. An operator input provides a signal to a controller of the electric circuit. The controller causes a MOSFET relay to provide a voltage to the electrically actuatable mechanism. The relay is adapted to vary the voltage in response to pulse width modified signals from the controller. | 04-19-2012 |
20120090308 | HYBRID HYDRAULIC SYSTEMS FOR INDUSTRIAL PROCESSES - A hydraulic drive system for driving a load includes a drive shaft; first and second hydraulic pumps driven by the drive shaft, and a control system that operates the hydraulic drive system in a plurality of modes including: a) a first mode where the second hydraulic pump pumps hydraulic fluid from a supply line to an accumulator; b) a second mode where the second hydraulic pump pumps hydraulic fluid from the accumulator to the supply line; c) a third mode where the second hydraulic pump pumps hydraulic fluid from the supply line to a reservoir; and d) a fourth mode where the second hydraulic pump pumps hydraulic fluid from the reservoir to the supply line. At least the second hydraulic pump is a variable displacement bidirectional pump. | 04-19-2012 |
20120090309 | Swing Control Apparatus and Swing Control Method for Construction Machinery - Disclosed is a swing control apparatus of construction machinery, including: a hydraulic pump discharging working oil for driving a swing motor and controlling a discharge flux according to an input pump command value Vpump; a pressure sensor sensing pressure of the working oil discharged from the hydraulic pump; and a control unit calculating the pump command value Vpump based on a swing operation quantity Vsw input from the swing operation unit to output the calculated pump command value to the hydraulic pump, wherein when the input swing operation quantity Vsw is larger than a preset reference swing operation quantity Vswo and the discharge pressure Ppump of the hydraulic pump detected by the pressure sensor is lower than a first reference pressure Pswr | 04-19-2012 |
20120096843 | WORK VEHICLE LIFTING PERFORMANCE - A work vehicle includes a fluid circuit to operate at least one implement for performing work, the fluid circuit having at least a first operating mode and a second operating mode. The first operating mode is configured to operate within a first predetermined flow rate range within a first predetermined fluid pressure level range. The second operating mode is configured to operate within a second predetermined flow rate range and within a second predetermined fluid pressure level range. In response to the fluid circuit operating within the second operating mode, a maximum pressure value of the second predetermined fluid pressure level range is greater than a maximum pressure value of the first predetermined fluid pressure level range, and a maximum value of the second predetermined flow level range is less than a maximum value of the first predetermined flow level range. | 04-26-2012 |
20120096844 | METHOD AND APPARATUS FOR EXTRACTING ENERGY FROM A FLUCTUATING ENERGY FLOW FROM A RENEWABLE ENERGY SOURCE - A hydraulic pump is driven by a rotating shaft, driven in turn by a renewable energy source. A hydraulic motor drives a load and a high pressure manifold communicates between the pump, motor and an elastically deformable fluid retaining body. The pressure in the high pressure manifold is measured and the net rate of displacement of working fluid by the hydraulic pump is selected responsive thereto to regulate the torque applied to the rotating shaft. The net rate of displacement of working fluid by the hydraulic motor is selected to smooth the energy flow to the load. The net rate of displacement of working fluid by the hydraulic motor is selected to regulate the pressure in the high pressure manifold to remain within an acceptable pressure range. | 04-26-2012 |
20120102935 | SYSTEMS, METHODS AND DEVICES FOR THE MANAGEMENT OF HEAT REMOVAL WITHIN A COMPRESSION AND/OR EXPANSION DEVICE OR SYSTEM - Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include an actuator such as a hydraulic actuator that can be used to compress a gas within a pressure vessel. An actuator can be actuated to move a liquid into a pressure vessel such that the liquid compresses gas within the pressure vessel. In such a compressor/expander device or system, during the compression and/or expansion process, heat can be transferred to the liquid used to compress the air. The compressor/expander device or system can include a liquid purge system that can be used to remove at least a portion of the liquid to which the heat energy has been transferred such that the liquid can be cooled and then recycled within the system. | 05-03-2012 |
20120117958 | METHOD AND APPARATUS FOR EXTRACTING ENERGY FROM A FLUCTUATING ENERGY FLOW FROM A RENEWABLE ENERGY SOURCE - In an energy extraction device and method for extracting energy from a fluctuating energy flow from a renewable energy source, a hydraulic pump is driven by a rotating shaft, driven in turn by a renewable energy source. A hydraulic motor drives a load and a high pressure manifold communicates between the pump, motor and an elastically deformable fluid retaining body. The hydraulic pump and hydraulic motor comprise working chambers displacing a volume of working fluid selectable on each cycle of working chamber volume by the control of electronic valves. The pressure in the high pressure manifold is measured and the net rate of displacement of working fluid by the hydraulic pump is selected responsive thereto to regulate the torque applied to the said rotating shaft. | 05-17-2012 |
20120137667 | Regenerative Hydraulic Pump - A regenerative hydraulic pump that allows for efficient operation of a hydraulic system under high pressure/low flow conditions that comprises a crankshaft providing a rotating inertial mass, and a regenerative hydraulic pump cylinder that comprises a pump cylinder housing, a pump piston mechanically connected to the crankshaft; and a compliant pressure chamber that stores a portion of the energy extracted by the pump piston during a pumping stroke for release back to the pump piston and to the crankshaft during a regenerative back stroke. | 06-07-2012 |
20120137668 | INCREASED POWER IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY - In various embodiments, energy is stored or recovered via super-atmospheric compression and/or expansion of gas in conjunction with substantially adiabatic compression and/or expansion from or to atmospheric pressure. | 06-07-2012 |
20120144815 | HIGH EFFICIENCY INFINITELY VARIABLE FLUID POWER TRANSFORMER - A high efficiency fluid power transformer is applied generally and particularly to continuous application where efficiency gain is important, that of an underwater wave energy converter, WEC, that reciprocates as recurring waves pass over. Single acting, double acting and helical hydraulic actuators pressurize hydraulic fluid in an energy conversion system. Ultimately, the energy conversion system powers one or more hydraulic motors that drive an electric generator or multiple generators. A sensor system detects characteristics of in-coming waves or alternatively, waves in the process of wave making, such as by detecting changes in pressure as waves pass over the sensor system. The sensors can be mounted on the ocean floor a few wave lengths from the WECs, and a control computer system calculates characteristics of the waves such as wave height and speed data, and uses the data to control aspects of the WECs and components of transformer system. | 06-14-2012 |
20120144816 | Method for Operating a Pneumatic System and Pneumatic System - Method for operating a pneumatic system comprising at least one pneumatic cylinder, the method comprising: supplying a first gas under pressure to a pneumatic cylinder for a first stroke, wherein the first stroke is a working stroke of said cylinder, and; providing a second gas under pressure, wherein the pressure of the second gas is lower than the pressure of the first gas, wherein providing the second gas comprises providing the first gas from the pneumatic cylinder during a second stroke of said pneumatic cylinder. | 06-14-2012 |
20120151904 | HYDRAULIC CONTROL SYSTEM HAVING ENERGY RECOVERY - A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, a swing motor configured to receive the pressurized fluid and swing a body of the machine relative to an undercarriage, and a tool actuator configured to receive the pressurized fluid and move a tool relative to the body. The hydraulic control system may also have an energy recovery device configured to convert hydraulic energy to mechanical energy, a first accumulator configured to store waste fluid received from the swing motor, and a second accumulator configured to store waste fluid received from the tool actuator. Stored waste fluid from at least one of the first and second accumulators may be selectively discharged into the energy recovery device. | 06-21-2012 |
20120151905 | Control Apparatus and Method for a Hydrostatically Actuated Vehicle - A method and apparatus for controlling operation of an engine in a hydrostatically driven vehicle having high and economy modes may include monitoring one or more control inputs. When in the economy mode the engine may be operated: at a fixed propel neutral speed when a propel control input is in a neutral position; at a fixed propel drive speed when the propel control input is in a drive position and a propel pump displacement signal is less than a maximum displacement position of a propel pump; and at a variable drive speed when the propel control input is in the drive position and the propel pump displacement signal indicates a maximum displacement position. The economy mode conserves fuel while ensuring that sufficient engine power is maintained to operate the propel and any implement pumps provided on the vehicle. | 06-21-2012 |
20120151906 | SYSTEM FOR CONTROLLING TORQUE CONVERTER TEMPERATURE DURING TORQUE CONVERTER STALL CONDITIONS - A method and system are provided for controlling the operating temperature of a torque converter during torque converter stall conditions. The torque converter has a pump rotatably driven by an internal combustion engine and a rotatable turbine fluidly coupled to the pump. The system first determines whether the torque converter is currently in a torque converter stall condition, and, if so, determines a slip speed as a difference in rotational speeds between the pump and the turbine, determines an engine output torque limit as a function of the slip speed and a desired slip speed, and controls the operating temperature of the torque converter by limiting output torque produced by the engine based on the engine output torque limit. | 06-21-2012 |
20120159939 | ELECTRIC PUMP - A system for lubricating transmission components with hydraulic fluid includes a pump and a motor coupled to the pump. The pump has an inlet port that receives hydraulic fluid and an outlet port from which hydraulic fluid is pumped to the transmission components. A pump pressure is regulated by adjusting a motor torque of the motor, and the motor torque is set by commands based on a look-up table or a formula. | 06-28-2012 |
20120167559 | ADSORPTION-ENHANCED COMPRESSED AIR ENERGY STORAGE - In an embodiment of the present disclosure, an energy storage device is presented. The energy storage device includes a porous material that adsorbs air and a compressor. The compressor converts mechanical energy into pressurized air and heat, and the pressurized air is cooled and adsorbed by the porous material. The energy storage device also includes a tank used to store the pressurized and adsorbed air and a motor. The motor is driven to recover the energy stored as compressed and adsorbed air by allowing the air to desorb and expand while driving the motor. | 07-05-2012 |
20120174569 | COMPENSATED COMPRESSED GAS STORAGE SYSTEMS - Systems, devices and methods for the compression, expansion, and/or storage of a gas are described herein. An apparatus suitable for use in a compressed gas-based energy storage and recovery system includes a pneumatic cylinder having a working piston disposed therein for reciprocating movement in the pneumatic cylinder, a hydraulic actuator coupled to the working piston, and a hydraulic controller fluidically coupleable to the hydraulic actuator. The apparatus is fluidically coupleable to a compressed gas storage chamber which includes a first storage chamber fluidically coupleable to the pneumatic chamber, and a second storage chamber is fluidically coupleable to the first storage chamber. The first storage chamber is disposed at a first elevation and is configured to contain a liquid and a gas. The second storage chamber is disposed at a second elevation greater than the first elevation, and is configured to contain a volume of liquid. | 07-12-2012 |
20120186241 | METHOD FOR RECOVERING KINETIC ENERGY OF HYBRID ELECTRIC VEHICLES, AND ENERGY ACCUMULATOR USING COMPRESSED AIR - The claimed innovation relates to an energy accumulator using compressed air for hybrid electric vehicles, which makes it possible to recover the electric energy generated from the vehicle kinetic energy, and store it using compressed air. This configuration increases the global efficiency, performance and operational reliability of the vehicle, reduces energy waste and ensures the availability and use of regenerating brakes in these conditions. | 07-26-2012 |
20120198827 | Hydraulic Drive System - A hydraulic drive system for an actuator uses a pair of pressure compensated hydraulic machines to control flow to and from the drive chambers of the actuator by varying the controlled pressure of one of the machines. The machines are mechanically coupled to permit energy recovery and charge an accumulator to store supplies energy. The drive system may be combined with other services including a transmission for incorporation in a vehicle. The transmission uses a pressure compensated supply and torque control of the wheels. | 08-09-2012 |
20120204548 | Cold Start Valve - Parasitic hydraulic loading on an engine is significantly reduced during cold starts by using an unloader valve to divert the flow of hydraulic fluid from a hydraulic pump to a hydraulic actuator, i.e., load source, recirculating the hydraulic fluid between the hydraulic pump and the unloader valve. | 08-16-2012 |
20120204549 | CONDITIONAL LOAD SENSE CONTROL - A method of controlling a hydraulic circuit having a pump, a hydraulic actuator, and a control valve disposed between the pump and hydraulic actuator is disclosed. The method includes selectively placing the hydraulic circuit between a work mode and a work standby mode based upon the relationship between the hydraulic actuator hydraulic pressure and at least one maximum pressure limit value. The work mode includes moving the control valve to an open position such that the pump and hydraulic actuator are in fluid communication with each other and commanding the pump to generate an output pressure value that is greater than the measured hydraulic actuator hydraulic pressure. The work standby mode includes moving the control valve to a closed position such that the pump is isolated from the hydraulic actuator and commanding the pump to generate an output pressure value that is independent of the measured hydraulic actuator hydraulic pressure. | 08-16-2012 |
20120210705 | SYSTEMS AND METHODS FOR REDUCING DEAD VOLUME IN COMPRESSED-GAS ENERGY STORAGE SYSTEMS - In various embodiments, dead space and associated coupling losses are reduced in energy storage and recovery systems employing compressed air. | 08-23-2012 |
20120216517 | HYDRAULIC CONTROL SYSTEM HAVING CYLINDER STALL STRATEGY - A hydraulic control system for a machine is disclosed. The hydraulic control system may have a hydraulic circuit, a pump configured to supply pressurized fluid, and a first sensor configured to generate a first signal indicative of a pressure of the hydraulic circuit. The hydraulic circuit may also have a first fluid actuator fluidly connected to receive pressurized fluid from the hydraulic circuit, a second sensor configured to generate a second signal indicative of a velocity of the first fluid actuator, and a controller in communication with the first and second sensors. The controller may be configured to receive an input indicative of a desired flow rate for the first fluid actuator, to determine an actual flow rate of the first fluid actuator based on the second signal, and to determine a stall condition of the first fluid actuator based on the desired flow rate, the actual flow rate, and the first signal. | 08-30-2012 |
20120216518 | HYDRAULIC CONTROL SYSTEM HAVING CYLINDER STALL STRATEGY - A hydraulic control system for a machine is disclosed. The hydraulic control system may have a hydraulic circuit, and a pump configured to supply pressurized fluid to the hydraulic circuit. The hydraulic control system may also have a first fluid actuator fluidly connected to receive pressurized fluid from the hydraulic circuit, a first valve arrangement movable to control a flow of fluid to the first fluid actuator, a second fluid actuator fluidly connected to receive pressurized fluid from the hydraulic circuit, and a second valve arrangement movable to control a flow of fluid to the second fluid actuator. The hydraulic control system may additionally have a controller in communication with the first and second valve arrangements. the controller may be configured to make a determination of a stall condition of the first fluid actuator, and to selectively change a flow command directed to the second valve arrangement based on the determination. | 08-30-2012 |
20120216519 | HYDRAULIC CONTROL SYSTEM HAVING CYLINDER FLOW CORRECTION - A hydraulic control system is disclosed. The hydraulic control system may have a hydraulic actuator, a valve arrangement, and an operator input device configured to generate a first signal indicative of a desired hydraulic actuator velocity. The hydraulic control system may also have a sensor configured to generate a second signal indicative of an actual flow rate of fluid entering the hydraulic actuator, and a controller. The controller may be configured to determine a desired flow rate of fluid into the hydraulic actuator based on the first signal; to estimate the actual flow rate based on the desired flow rate, a correction flow rate, and a system response model; and to determine the actual flow rate based on the second signal. The controller may also be configured to make a comparison of the estimated and determined actual flow rates of fluid, and to determine the correction flow rate based on the comparison. | 08-30-2012 |
20120227391 | DEVICE AND METHOD FOR CONTROLLING HYDRAULIC PUMP OF CONSTRUCTION MACHINERY - The present invention relates to a device for controlling a hydraulic pump of construction machinery. The device has a first pump supplying working fluid through a swing control valve to a swing motor, and a second pump supplying working fluid through a work tool control valve to a work tool actuator, and includes: a first tilting angle control unit for controlling a discharge flow of the first pump by controlling a tilting angle of the first pump according to an input pump control signal; and a controller deducting a discharge pressure (P | 09-13-2012 |
20120233990 | METHOD FOR OPERATING A HYDRAULIC DRIVE DEVICE AND METHOD OF OPERATING THE SAME - The invention relates to a method for operating a hydraulic drive device comprising a hydraulic piston-cylinder unit having a working piston that can be moved in a working direction between an upper dead point and a lower dead point, a set point for the position of the working piston in the working direction being predefined, and an actual value of the position of the working piston in the working direction being interrogated, and the movement of the working piston being regulated as a function of the set point and the actual value. The invention additionally relates to a hydraulic drive device. | 09-20-2012 |
20120233991 | MULTI-FUNCTION MACHINES, HYDRAULIC SYSTEMS THEREFOR, AND METHODS FOR THEIR OPERATION - Systems and methods for controlling and actuating actuators that perform multiple functions in a machine. Such systems and methods encompass a hydraulic system adapted to control and actuate the actuators of the machine. The hydraulic system includes variable displacement pump/motors connected to the engine in parallel. A first of the pump/motors controls a first of the actuators, and a second of the pump/motors is adapted to draw power from and deliver power to the engine and the first actuator, as well as control at least a second of the actuators. An energy storage device is connected in series with the second pump/motor and the second actuator, and accumulates a fluid pumped thereto by the second pump/motor, as well as delivers the fluid to the second pump/motor, depending on whether the second pump/motor delivers is delivering or drawing power from the engine or first actuators. | 09-20-2012 |
20120233992 | WHEEL END WITH INTEGRATED MOTOR ASSEMBLY - A wheel end assembly comprises a wheel hub support housing and a wheel hub drive assembly rotatably connected to the wheel hub support housing. The wheel end assembly also includes a hydraulic motor operatively coupled to the wheel hub drive assembly, the hydraulic motor being disposed to deliver a torque to the wheel hub drive assembly. The wheel end assembly further includes a pump, fluidly coupled to the wheel hub drive assembly and the hydraulic motor, the pump being disposed to provide a flow of hydraulic fluid to the wheel hub drive assembly. | 09-20-2012 |
20120233993 | METHOD FOR CONTROLLING A HYDRAULIC SYSTEM OF A WORKING MACHINE - A method is provided for controlling a hydraulic system of a working machine, which hydraulic system includes a first hydraulic machine for providing hydraulic fluid to a first actuator of the working machine, and a second hydraulic machine for providing hydraulic fluid to a second actuator of the working machine and for providing hydraulic fluid to the first actuator. The method includes using a first control mode, and in the first control mode allowing a flow of hydraulic fluid from the second hydraulic machine to the second actuator, wherein the pump pressure of the second hydraulic machine is selected based on the load pressure of the second actuator independently of the load pressure of the first actuator. The method further includes using a second control mode provided that the requested flow to the first actuator exceeds a predetermined threshold value, and in the second control mode allowing a flow of hydraulic fluid from the second hydraulic machine to the first actuator, wherein the pump pressure of the second hydraulic machine is selected based on the highest value of the load pressure of the second actuator and the load pressure of the first actuator. | 09-20-2012 |
20120240564 | ACCUMULATOR ASSISTED HYDROSTATIC DRIVELINE AND OPTIMIZATION METHOD THEREOF - A hydrostatic driveline for a vehicle, a method for minimizing a fuel consumption rate of the vehicle, and a method for tracking an optimal state of charge function for a hydrostatic accumulator are provided. The driveline includes a power source, a drive axle, a first fluid accumulator, a second fluid accumulator, an auxiliary circuit including a first pump drivingly engaged with the power source, and a drive circuit including a second pump drivingly engaged with the power source, a motor drivingly engaged with the drive axle, and a directional valve. The second pump is in fluid communication with the directional valve and the directional valve in fluid communication with the first fluid accumulator and the second fluid accumulator. The directional valve may be selectively controlled to direct fluid from the second pump and the motor to the first fluid accumulator and the second fluid accumulator. | 09-27-2012 |
20120240565 | SHIFT CYLINDER, DRIVE DEVICE, WORK MACHINE AS WELL AS METHOD FOR OPERATING A WORK MACHINE - The invention relates to a shift cylinder including a cylinder element having a working space, a first and a second piston received in the working space displaceably relatively to it, by which the working space is divided in a first working chamber capable of being charged with a working medium through a first port of the shift cylinder, a second working chamber capable of being charged with a working medium through a second port of the shift cylinder and a third working chamber disposed between the first and the second working chamber, including at least one spring member capable of being supported on the first piston on the one hand and on the second piston on the other hand. | 09-27-2012 |
20120255290 | LATCHING ACTUATOR - A latching actuator capable of repeated operation in a cryogenic, remote, or difficult-to-access environment, capable of enduring many cycles without user intervention or maintenance, capable of latching in a fixed position without consuming additional power, or to operate independent of external environmental conditions. In selected embodiments, a latching actuator may comprise an expansion chamber that houses a working substance capable of undergoing a phase change, a logic mechanism, a biasing assembly, and an output pin. In one embodiment, a wax motor may provide the motive force to toggle a latching mechanism. An actuator may be capable of positioning an output pin in two or more discrete latching positions and may be used to create a thermal connection between two structures, to engage or disengage a clutch, or to position an optical element in an optical instrument. An actuator may also be used as a launch lock apparatus. | 10-11-2012 |
20120260641 | Overrunning pump protection for flow-controlled actuators - A hydraulic system includes an actuator, a pump, rod side and cap side fluid connections between the pump and the rod and cap side chambers, respectively, at least one selectively actuatable regeneration valve that selectively provides flow from the cap side fluid connection to the rod side fluid connection, and a controller. The controller controls the pump to selectively vary the flow rate of the pump in response to a commanded motion to control movement of the piston. The controller actuates the regeneration valve during a retraction of the piston into the cylinder when pump is acting as a motor. | 10-18-2012 |
20120260642 | Load holding for meterless control of actuators - First and second mechanical hydraulic valves are disposed between a pump and the cap side chamber of an actuator and the pump and the rod chamber of the pump. The first and second valves are actuated as a result of respective pressure differentials applied across the valves. A controller controls flow from a pump in response to a commanded motion to control movement of the actuator, and cause the valves to open. The valves are disposed in their no-flow positions when the pump is not operative, and when the hydraulic system of off or locked out to hold a load. | 10-18-2012 |
20120260643 | VELOCITY CONTROL FOR HYDRAULIC CONTROL SYSTEM - A hydraulic drive system for an actuator uses a pair of pressure compensated hydraulic machines to control flow to and from the drive chambers of the actuator. The capacity of one of the machines is limited in a motoring mode to determine a maximum rate of efflux from one of the chambers. The pressure of fluid supplied to the other of said chambers is maintained at a predetermined level to provide motive force. The machines are mechanically coupled to permit energy recovery and charge an accumulator to store surplus energy. | 10-18-2012 |
20120279209 | SYSTEMS AND METHODS FOR ENERGY STORAGE AND RECOVERY USING COMPRESSED GAS - The invention relates to methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator and at least one intensifier in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side of the circuits. | 11-08-2012 |
20120285153 | Drive System for Electric Vehicles - A system includes a high pressure accumulator; a low pressure reservoir; and a plurality of pumps configured to control the flow of fluid between the high pressure accumulator and the low pressure reservoir, a battery; an electric motor powered by the battery; a management unit in communication with the electric motor and the plurality of pumps. | 11-15-2012 |
20120285154 | EFFICIENCY OF LIQUID HEAT EXCHANGE IN COMPRESSED-GAS ENERGY STORAGE SYSTEMS - In various embodiments, efficiency of energy storage and recovery systems employing compressed air and liquid heat exchange is improved via control of the system operation and/or the properties of the heat-exchange liquid. | 11-15-2012 |
20120285155 | COOLING SYSTEM FOR GEROTOR MOTOR - A hydraulic motor having a cooling system includes a stator, a rotor that rotates and orbits in the stator, a drive link connected to the rotor, and a housing connected with the stator. The housing includes a working fluid inlet port, a working fluid outlet port, a cooling fluid inlet port, and a cooling fluid outlet port. Each port extends through the housing and is configured to connect with a different associated external fluid line. Pressurized fluid enters the working fluid inlet port to rotate and orbit the rotor en route to the working fluid outlet port. The cooling fluid ports are isolated from the working fluid inlet port and the working fluid outlet port within the housing. | 11-15-2012 |
20120291426 | Autonomous Electricity Production and Conditioning System for an Aircraft, Associated Aircraft and Method - The system according to the invention comprises a rotary shaft ( | 11-22-2012 |
20120297758 | Large Displacement Variator - A large displacement hydrostatic variator is disclosed which includes an input shaft coupled to at least first and second hydrostatic pumps. Two hydrostatic pumps are utilized instead of one larger hydrostatic pump because it has been found the two smaller hydrostatic pumps can operate at a faster speed than a larger hydrostatic pump with a displacement equivalent to that of the two smaller hydrostatic pumps. Each hydrostatic pump may include a carrier that includes a plurality of recesses. The recesses may serve as cylinders for slidably accommodating a piston in each piston of each pump may be pivotally coupled to an adjustable swash plate. A hydrostatic motor may be coupled to an output shaft. The motor includes a carrier that also includes a plurality of recesses that may also serve as cylinders for each slidably accommodating a piston. Each piston of the motor may be coupled to a swash plate. The adjustable swash plate of each pump may be coupled to an actuator, which may be controlled by a single controller. | 11-29-2012 |
20120304631 | HYDRAULIC FLUID SYSTEM - A hydraulic fluid system for a mobile machine includes a closed loop hydraulic fan circuit. The hydraulic fan circuit includes a primary pump, a motor fluidly connected to the primary pump, and a fan driven by the motor. The hydraulic fan circuit also includes a supply passage extending from the primary pump to the motor, a return passage extending from the motor to the primary pump, and a first accumulator selectively fluidly connected to at least one of the supply and return passages via a charge valve. The hydraulic fluid system also includes at least one open loop hydraulic circuit fluidly connected to the first accumulator. | 12-06-2012 |
20120304632 | Oil jet for increased efficiency - The Oil Jet for Increased Efficiency system makes use of internally developed, and stored, oil pressure to direct additional force to assist moving parts in an internal combustion engine, rotating device of any nature, and/or any power producing mechanism, to assist in overcoming frictional, compression, drag, and other resistive forces within said mechanism in order to increase efficiency. | 12-06-2012 |
20120312003 | METHOD FOR ACTUATING A HYDRAULICALLY MOVABLE WORKING ELEMENT OF A WORKING EQUIPMENT, AND A WORKING EQUIPMENT - The invention relates to a method and to a working equipment for actuating a hydraulically movable working element ( | 12-13-2012 |
20120312004 | EMISSION-FREE DEVICES AND METHOD FOR PERFORMING MECHANICAL WORK AND FOR GENERATING ELECTRICAL AND THERMAL ENERGY | 12-13-2012 |
20120317964 | Hydrostatic Circuits with Variable Charge and Variable Flushing Systems - A closed hydrostatic circuit with variable charge and variable flushing systems is disclosed. A variable displacement charge pump is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve is in communication with an output of the charge pump and is linked to a controller. When the hydrostatic control system detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve, that is in communication with an output of the charge pump and that is linked to a controller, increases the charge pump flow. A bidirectional variable displacement hydrostatic motor is connected in parallel to two input/output lines. A flush valve is in communication with the hydrostatic motor and both input/output lines. The flush valve and hydrostatic motor are both in communication with the flush orifice and a flush relief valve. When the pressure regulating valve causes the charge pump to operate at or near a full capacity, fluid exits the flush valve and passes through both the flush orifice and the flush relief valve. In contrast, when the pressure regulating valve causes the charge pump to operate at a lower or near minimum capacity, fluid exits the flush valve and passes through the flush orifice only without passing through the flush relief valve. | 12-20-2012 |
20120317965 | AUTOMATED HYDRAULIC POWER SYSTEM AND A METHOD OF OPERATING AN AUTOMATED HYDRAULIC POWER SYSTEM - The present a hydraulic system and a method for operating a hydraulic system that includes an engine, at least one hydraulic pump, a pump box interposed between the engine and the at least one hydraulic pump, at least one hydraulic clutch pack interposed between the pump box and the at least one hydraulic pump, at least one valve, a hydraulic fluid reservoir, a clutch actuation pump, and one or more electronics. The at least one hydraulic clutch pack selectively transmits torque to the at least one hydraulic pump. The at least one valve may be opened to supply pressurized hydraulic fluid to the at least one clutch pack and may be closed to interrupt a supply of pressurized hydraulic fluid to the at least one clutch pack in order to selectively engage or disengage the clutch pack. | 12-20-2012 |
20120324873 | AUTOMATIC TRANSMISSION HYDRAULIC ACCUMULATOR - A hydraulic accumulator system for providing pressurized oil to a transmission in a vehicle. The system includes a transmission oil storage chamber to store oil at a predetermined level; and a hydraulic accumulator mounted in the oil storage chamber and including an accumulator piston mounted below the level of oil, separating an accumulator oil area from a remainder of the oil storage area and movable to increase and decrease the oil in the accumulator oil area, and a spring biasing the piston toward the accumulator oil area. The system also has a hydraulic assembly including a first oil passage for removing the oil from the remainder of the oil storage area, a second oil passage for directing oil into and out of the accumulator oil area below the predetermined oil level and a hydraulic circuit directing the oil from the first oil passage into the second oil passage. | 12-27-2012 |
20120324874 | INDEPENDENT SUPPLY AND EXHAUST METERING WITHIN A VALVE CASTING - The present disclosure provides a hydraulic system for controlling a load. The system includes a housing defining an inlet, a first port, and a second port. The system further includes a spool valve and a proportional control element. The spool valve is in fluid communication with the inlet and the second port and the proportional control element is in fluid communication with the first port. The proportional control element can be controllable to exhaust fluid from the first port to a reservoir. In this arrangement, the proportional control element and the spool valve are controlled independently of one another. | 12-27-2012 |
20120324875 | OPTIMIZED SYSTEM RESPONSE WITH MULTIPLE COMMANDS - A method and system for operating a machine having first and second movable elements, first and second hydromechanical movers for moving the first and second movable elements, respectively, and first and second hydraulic pumps linked to the first and second hydromechanical movers, respectively. Movement requests for moving the first and second movable elements are processed such that the movement command to the second hydromechanical mover is reduced by a variable amount based on the magnitude of the first movement request. For commanded first hydromechanical mover movements below a certain level, flow to the second hydromechanical mover may optionally not be reduced. | 12-27-2012 |
20120324876 | SUBSEA ACCUMULATOR SYSTEM - Embodiments of a subsea accumulator system are disclosed. The system includes a subsea skid structure, a pre-charged fluid accumulator mounted in the subsea skid structure and fluidly coupled to a flowline in the skid structure, and a subsea device coupled to the flowline to receive hydraulic fluid power from the pre-charged fluid accumulator. The system may include a fill port having a releasable connection to selectively couple with a hydraulic fluid supply separate from the skid structure. Certain embodiments may include a subsea pump, instead of a pre-charge, for delivering pressurized fluid to a piston in the accumulator, and multiple accumulators for mixing fluids or discharging the fluids sequentially. | 12-27-2012 |
20120324877 | SYSTEM FOR DRIVING A BOOM OF A HYBRID EXCAVATOR AND A CONTROL METHOD THEREOF - Disclosed are a system for driving a boom of a hybrid excavator, and a method for controlling same. The disclosed system comprises: an electric motor operating by means of a motor or generator; a capacitor for storing electricity generated by the electric motor; a hydraulic pump motor driven by the electric motor to supply working oil to a boom; a boom control valve having a closed circuit for selectively connecting/disconnecting a discharge line and an inlet line of the hydraulic pump motor to/from a head or a load of the boom; a main pump driven by a driving source arranged separately from the motor so as to supply working oil to a bucket, driving motor, or arm; a boom-assisting valve, which connects a discharge line of the main pump to the discharge line of the hydraulic pump motor, such that working oil discharged from the main pump and the hydraulic pump motor can be combined; and a control unit for controlling the electric motor, the hydraulic pump motor, and the boom control valve. The system of the present disclosure minimizes the loss of energy during excavation, which is the main use of an excavator, while using the electric motor, ensures the operating performance of the boom, and recovers regenerative energy from the boom. | 12-27-2012 |
20120324878 | Hydraulic Drive System And Diagnostic Control Strategy For Improved Operation - A method and apparatus are provided for hydraulic fluid supply between a hydraulic pump and a hydraulic drive unit, switching hydraulic fluid flow direction to the hydraulic drive unit or stopping hydraulic fluid flow to the hydraulic drive unit when measured hydraulic fluid pressure crosses a predetermined pressure threshold value. The method further comprises calculating an amount of mechanical work done by the hydraulic drive unit and warning an operator or limiting hydraulic fluid flow rate to the hydraulic drive unit when the calculated mechanical work for the drive cycle is less than an expected amount of mechanical work. The apparatus for practicing the method further includes a pressure sensor associated with a hydraulic fluid supply conduit between the pump and the drive unit, and an electronic controller programmed to operate the drive system according to the method. | 12-27-2012 |
20120324879 | Hydraulic Hybrid Vehicle with Safe and Efficient Hydrostatic Operation - A shut off valve is configured to shut off flow from the high pressure fluid line to the high pressure accumulator in a series hydraulic hybrid vehicle in order to quickly raise system pressure in the high pressure fluid line and enable additional torque output from the hydraulic motor for vehicle propulsion. A pressure relief valve is further provided to vent excess flow from the high pressure line to the high pressure accumulator as needed to avoid exceeding a maximum desired system pressure in the high pressure fluid line, thereby providing for safe and efficient hydrostatic operation in the vehicle. | 12-27-2012 |
20130000288 | HYDRAULIC CONTROL SYSTEM HAVING VARIABLE PRESSURE RELIEF - A hydraulic control system is disclosed. The hydraulic control system may have a pump configured to pressurize a fluid, an actuator, a position sensor associated with the actuator and configured to generate a first signal indicative of a position of the actuator, and a circuit fluidly connecting the pump to the actuator. The hydraulic control system may also have a valve associated with the circuit and configured to move from a first position, at which fluid relief from the circuit is inhibited, toward a second position, at which fluid is relieved from the circuit through the valve, when a pressure of fluid within the circuit exceeds a threshold setting of the valve. The hydraulic control system may additionally have a controller in communication with the position sensor and the valve. The controller may be configured to selectively cause adjust the threshold setting of the valve based on the first signal. | 01-03-2013 |
20130000289 | HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY - A hydraulic control system for a machine is disclosed. The hydraulic control system may have a work tool movable to perform an excavation cycle having a plurality of segments, a motor configured to swing the work tool during the excavation cycle, and a pump configured to pressurize fluid directed to drive the motor. The hydraulic control system may also have at least one accumulator configured to selectively receive fluid discharged from the motor and to discharge fluid to the motor during the plurality of segments, and a controller configured to implement a plurality of modes of operation. Each of the plurality of modes of operation includes a different combination of segments during which the at least one accumulator receives and discharges fluid. | 01-03-2013 |
20130000290 | ENERGY RECOVERY SYSTEM HAVING ACCUMULATOR AND VARIABLE RELIEF - A swing energy recovery system for a machine is disclosed. The swing energy recovery system may have a pump configured to pressurize fluid, a motor driven by a flow of pressurized fluid from the pump, and an energy recovery arrangement configured to receive pressurized fluid discharged from the motor and selectively supply pressurized fluid to the motor. The swing energy recovery system may also have a pressure relief valve associated with the motor, and a controller in communication with the energy recovery arrangement and the pressure relief valve. The controller may be configured to selectively adjust a setting of the pressure relief valve based on an operating condition of the energy recovery arrangement. | 01-03-2013 |
20130000291 | HYDRAULIC CIRCUIT HAVING ENERGY STORAGE AND REUSE - A hydraulic circuit is disclosed. The hydraulic circuit may have a pump, a motor, a tank, and an accumulator. The hydraulic circuit may also have a valve movable between a first position at which an output of the pump is fluidly connected to the tank and the accumulator is fluidly connected to the motor, and a second position at which the output of the pump is fluidly connected to the motor. | 01-03-2013 |
20130000292 | ELECTRONIC HIGH HYDRAULIC PRESSURE CUTOFF TO IMPROVE SYSTEM EFFICIENCY - A method for overpressure control in a hydraulic system having multiple hydraulic pumps, with each hydraulic pump being connected by a respective hydraulic circuit for actuating a single respective hydraulic actuator, includes actuating a first variable displacement hydraulic pump, the first hydraulic pump being fluidly linked by a first hydraulic circuit to a first hydraulic actuator for powering the first hydraulic actuator. Upon detecting a pressure that exceeds a predetermined threshold pressure, the flow rate of the first hydraulic pump is electronically modified to a second flow rate lower than the first flow rate whereby the pressure in the first hydraulic circuit is reduced to a pressure that is below the predetermined threshold pressure. | 01-03-2013 |
20130000293 | HYDRAULIC SYSTEMS UTILIZING COMBINATION OPEN- AND CLOSED-LOOP PUMP SYSTEMS - A pump system includes a closed-loop fluid circuit and an open-loop fluid circuit. The closed-loop fluid circuit includes a motor for rotating a first component connected to the closed-loop fluid circuit. A closed-loop pump drives the motor up to a first maximum rotational speed. The open-loop fluid circuit includes an open-loop pump for driving a second component connected to the open-loop fluid circuit. A control circuit includes a control valve for switching the outflow from the open-loop pump. The control valve selectively connects the open-loop pump to the closed-loop fluid circuit and simultaneously disconnects the open-loop pump from the open-loop fluid circuit. When the open-loop pump is connected to the closed-loop circuit, the closed-loop pump and the open-loop pump drive the motor at a second rotational speed greater than the first maximum rotational speed. | 01-03-2013 |
20130000294 | TRANSMISSION SHIFTING WITH SPEED DITHER AND TORQUE DITHER - A system and method of dithering speed and/or torque for shifting a transmission of a vehicle having an engine, a reversible, variable displacement hydraulic motor/pump which can be driven by the engine, a hydraulic accumulator supplied by said motor/pump, and at least one reversible hydraulic driving motor for propelling the vehicle supplied with fluid by the hydraulic accumulator and/or by said motor/pump operating as a pump. A transmission unit connects the engine with the variable displacement hydraulic motor/pump during a first mode of operation (city mode) and connects the engine to a vehicle drive wheel during a second mode of operation. The system utilizes stored hydraulic energy to dither the output of the driving motor in order to achieve quick and smooth shifts between city and highway mode, or between various ranges within the city mode. | 01-03-2013 |
20130008152 | ENERGY STORAGE SYSTEM FOR A HYBRID VEHICLE - An energy storage system, for a hybrid vehicle including an internal combustion engine having an output shaft and a transmission operably coupled to the output shaft, includes a reservoir containing working fluid, a reversible pump/motor in fluid communication with the reservoir, a first clutch selectively drivably coupling the output shaft of the engine and the reversible pump/motor, a second clutch selectively drivably coupling an output shaft of the transmission and the reversible pump/motor, and an accumulator containing working fluid and gas. The accumulator is in fluid communication with the reversible pump/motor to deliver pressurized working fluid to the reversible pump/motor when operating as a motor to drive one of the respective output shafts of the engine and the transmission, and to receive pressurized working fluid discharged by the reversible pump/motor when operating as a pump driven by the one of the respective output shafts of the engine and the transmission. | 01-10-2013 |
20130008153 | TOOL COUPLER ASSEMBLY - A tool coupler assembly for a machine is disclosed. The tool coupler assembly may have a coupler frame, a first latch, a second latch, and a hydraulic actuator connected to move the second latch relative to the first latch and the coupler frame. The hydraulic actuator may have a first chamber, a second chamber, and a pressure valve with a check element movable to allow a flow of fluid into the first chamber based on a pressure of fluid in the first chamber, and a pressure regulating element movable to allow a flow of fluid out of the first chamber based on a pressure of fluid in the second chamber. The tool coupler assembly may additionally have a first pilot passage configured to communicate fluid from the second chamber with the pressure-regulating element, and a second pilot passage configured to communicate fluid from the first chamber with the pressure-regulating element. | 01-10-2013 |
20130014498 | Variable Displacement Hydraulic Pump ControlAANM Kinch; DerekAACI YpsilantiAAST MIAACO USAAGP Kinch; Derek Ypsilanti MI USAANM Dobson; Mark R.AACI HowellAAST MIAACO USAAGP Dobson; Mark R. Howell MI USAANM Pekarsky; LevAACI W. BloomfieldAAST MIAACO USAAGP Pekarsky; Lev W. Bloomfield MI USAANM Mahapatro; HrudayaAACI CantonAAST MIAACO USAAGP Mahapatro; Hrudaya Canton MI US - A system controlling pressure in a transmission including a variable displacement pump, a circuit carrying fluid from the pump to the transmission, a valve using fluid in said circuit to regulate pressure that controls displacement of the pump, a source of control pressure including an accumulator, a first spring acting with said source causing the valve to change the regulated pressure, and a second spring acting with feedback pressure from said circuit to oppose said change. | 01-17-2013 |
20130014499 | Methods for Safe Operation of Hydraulic Hybrid Vehicles with Over-Center Pump/Motors - Fail-safe methods for utilizing an over-center pump/motor in a hydraulic hybrid vehicle are disclosed. A high-pressure fluid shutoff valve and an optional electrically or manually operated valve are additionally provided as means to ensure disconnection of the high pressure source in the event of a failure. Displacement stroke position and pressure differentials across the pump/motor are continually monitored. On detection of various modes of failure or irregularity in control of displacement, actions are taken including any of: the high pressure and low pressure accumulators are shut off automatically or manually, a check valve between the high and low pressure ports of the pump/motor is activated, and a small amount of pressurized fluid is released from the high pressure circuit to depressurize the captive fluid. Safe startup and shutdown procedures are also specified. The system provides for safe operation of a hydraulic hybrid vehicle that includes an engine pump and drive motor, at least one of which operates over-center. The system optionally provides a displacement control valve that is controlled by feedback from an actuator or displacement position sensor and that on loss of electric power to the displacement control valve will cause the controlled pump/motor to stroke to a zero displacement position. | 01-17-2013 |
20130025271 | Method and arrangement for active make-up in an overrunning actuator - A hydraulic system having an actuator having a piston and associated rod forming head and rod chambers and being adapted to move between retracted and extended positions within a cylinder, and first and second sources of fluid. A first pump provides fluid from the first source to the head chamber at a first pressure. At least one valve provides fluid from the second source at a second pressure to supplement fluid provided to the head chamber from the first pump when the second pressure is greater than the first pressure. | 01-31-2013 |
20130036727 | DEVICE HAVING A HYDRAULIC DRIVE FOR CIVIL ENGINEERING - A device having a hydraulic drive for civil engineering work has least one shaft that can be rotated by a hydraulic motor. The hydraulic motor is operated by fluid of a hydraulic circuit that is supplied by a hydraulic pump. The hydraulic motor has a changeable displacement, and means for changing the volume stream are provided. A sensor for measuring the fluid pressure is disposed in the hydraulic circuit, and is connected with a control and regulation unit, by way of which the displacement of the hydraulic motor is adjustable, and by way of which the means for a change in the volume stream can be turned on. The control and regulation unit is set up so that in the event of a pressure drop in the hydraulic circuit, a reduction in the displacement of the hydraulic motor as well as a reduction in the volume stream is brought about. | 02-14-2013 |
20130036728 | PUMP SUCTION CHARGING SYSTEM - Disclosed are hydraulic pump systems and pump suction charging systems which reduce or eliminate cavitation in the systems, as well as methods of operating the same and work machines including the same. | 02-14-2013 |
20130042601 | High Output Modular CAES (HOMC) - A compressed air energy storage system integrated with a source of secondary heat, such as a simple cycle gas turbine, to increase power production and to provide power regulation through the use of stored compressed air heated by said secondary heat to provide power augmentation. | 02-21-2013 |
20130042602 | Power Train For a Hybrid Vehicle - The invention relates to a power train for a hybrid vehicle, comprising two hydraulic machines ( | 02-21-2013 |
20130067899 | HYDROSTATIC TORQUE CONVERTER AND TORQUE AMPLIFIER - An example includes a hydraulically controllable coupling to couple a rotating input and to an output to rotate, or to decouple the input and the output, with coupling and decoupling modes selected by switching a hydraulic device such as a vane pump between a pumping mode and a mode in which it does not pump. In an example, the system cooperates with a transmission to increase the number of possible gear ratios in some examples. | 03-21-2013 |
20130074484 | FOOTWEAR HAVING AIR-CONTROLLED ACTIVE ELEMENT - A clothing article for a foot including a sole including a sealed collapsible air cavity having disposed therein a return support for expanding a collapsed air cavity wherein the air cavity includes an outlet permitting a quantity of air to exit when the air cavity is collapsed; an upper, coupled to the sole, for covering a portion of the foot; an air-actuated active element coupled to the upper, the active element including a first mode and a second mode, the active element biased to the first mode and responsive to the quantity of air to transition from the first mode to the second mode; and a communication channel, coupled to the outlet and to the active element, for transferring the quantity of air from the air cavity to the active element. | 03-28-2013 |
20130074485 | SYSTEMS AND METHODS FOR FOAM-BASED HEAT EXCHANGE DURING ENERGY STORAGE AND RECOVERY USING COMPRESSED GAS - In various embodiments, foam is compressed to store energy and/or expanded to recover energy. | 03-28-2013 |
20130081382 | REGENERATION CONFIGURATION FOR CLOSED-LOOP HYDRAULIC SYSTEMS - A hydraulic system is disclosed. The hydraulic system may have a pump, and a hydraulic actuator having a first chamber and a second chamber. The hydraulic system may also have a first pump passage fluidly communicating the pump with the first chamber, a second pump passage connected to the pump, and a regeneration valve. The regeneration valve may be movable from a first position at which the second pump passage is connected to the second chamber and the second chamber is isolated from the first chamber, to a second position at which the second pump passage is blocked and the second chamber is connected to the first chamber. | 04-04-2013 |
20130081383 | CLOSED-LOOP HYDRAULIC SYSTEM HAVING ENERGY RECOVERY - A hydraulic system is disclosed. The hydraulic system may have a pump with variable-displacement, a first linear actuator, and a second linear actuator coupled to the first linear actuator to operate in tandem. The first and second linear actuators may be connected to the pump in closed-loop manner, and each of the first and second linear actuators may have a first chamber and a second chamber separated by a piston. The hydraulic system may also have an accumulator in fluid communication with the second chamber of only the second linear actuator. | 04-04-2013 |
20130081384 | METERLESS HYDRAULIC SYSTEM HAVING PUMP PROTECTION - A hydraulic system is disclosed. The hydraulic system may have an over-center, variable-displacement pump, an actuator, and first and second passages that create a closed-loop circuit. The hydraulic system may also have first and second check valves disposed in the first and second passages, respectively, to allow flow only from the pump to the actuator. The hydraulic system may further have a first bypass line connecting the first passage at a location between the actuator and the first check valve to the first passage at a location between the first check valve and the pump, and a second bypass line connecting the second passage at a location between the actuator and the second check valve to the second passage at a location between the second check valve and the pump. The hydraulic system may additionally have a valve configured to control flow through the first and second bypass lines. | 04-04-2013 |
20130081385 | METERLESS HYDRAULIC SYSTEM HAVING MULTI-ACTUATOR CIRCUIT - A hydraulic system is disclosed. The hydraulic system may have a pump, a rotary actuator, a linear actuator, and a closed-loop circuit fluidly connecting the pump to the rotary and linear actuators. The hydraulic system may also have at least one valve configured to switch fluid flow direction from the pump through the linear actuator during fluid flow in a single direction through the rotary actuator. | 04-04-2013 |
20130081386 | SYSTEM AND METHOD FOR CONTROLLING CHARGING OF AN ACCUMULATOR IN AN ELECTRO-HYDRAULIC SYSTEM - A novel energy saving mode of charging an accumulator in an electro-hydraulic system is disclosed involving toggling the position of a fan isolation valve from the flow-passing position, where the flow is driving a fan motor thereby maintaining a fan in an on position, to the flow-blocking position where the flow is inhibited from driving the fan motor thereby causing the fan to turn off, when the time to charge an accumulator is less than the period of time that the fan may be off and still allow for the cooling requirements of the engine to be satisfied. By diverting fluid flow from driving the fan motor to charging the accumulator, the disclosed energy saving mode allows for a greater flow of fluid to be delivered to the accumulator for charging, making it possible to charge the accumulators quicker and more efficiently while maintaining the cooling requirements of the engine. The energy saving mode of operation may illustratively be used in a hystat fan and hybrid system. | 04-04-2013 |
20130086895 | Pneumatic Starter Device for Internal Combustion Engines and Method of Operation - A pneumatic starter device for an internal combustion engine includes a cylinder-piston assembly, which can be operated either as a compressor or as a starter motor and which is drive-connected to the internal combustion engine. A pressure accumulator and a valve arrangement are associated with this assembly. The valve arrangement, which is between the assembly and the pressure accumulator, can be activated by a control unit and can be switched between a compressor mode and a starter mode. Before the cylinder-piston assembly is started up, it is set to a crank angle position in a range of positions that produce maximum output torque. | 04-11-2013 |
20130091833 | Hydraulic control system and hydraulic control method - A hydraulic control system and a hydraulic control method are disclosed. The hydraulic control system comprises a first closed pump (P | 04-18-2013 |
20130091834 | DEAD-VOLUME MANAGEMENT IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, coupling losses between a cylinder assembly and other components of a gas compression and/or expansion system are reduced or eliminated via valve-timing control. | 04-18-2013 |
20130091835 | DEAD-VOLUME MANAGEMENT IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, coupling losses between a cylinder assembly and other components of a gas compression and/or expansion system are reduced or eliminated via valve-timing control. | 04-18-2013 |
20130098010 | Closed-Loop Hydraulic System Having Priority-Based Sharing - A hydraulic system is disclosed having first, second, and third pumps. The hydraulic system may also have a first actuator connected to the first pump in closed-loop manner, a second actuator connected to the second pump in closed-loop manner, and a third actuator. The hydraulic system may further have a selector valve associated with the third pump, and a first switching valve associated with the third pump and the third actuator. The first switching valve may be movable between a first position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a first direction, a second position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a second direction, and a third position at which the third pump is connected to the selector valve. | 04-25-2013 |
20130098011 | HYDRAULIC SYSTEM HAVING MULTIPLE CLOSED-LOOP CIRCUITS - A hydraulic system is disclosed. The hydraulic system may have a first circuit fluidly connecting a first pump to a swing motor in a closed-loop manner, and a second circuit fluidly connecting a second pump to a first travel motor and a first linear tool actuator in a parallel closed-loop manner. The hydraulic system may also have a combining valve configured to selectively fluidly connect the first circuit to the second circuit. | 04-25-2013 |
20130098012 | METERLESS HYDRAULIC SYSTEM HAVING MULTI-CIRCUIT RECUPERATION - A hydraulic system is disclosed. The hydraulic system may have a first meterless circuit with a first pump fluidly connected to a first actuator in a closed-loop manner, and a second meterless circuit with a second pump fluidly connected to a second actuator in a closed-loop manner. The hydraulic system may also have at least one accumulator configured to receive pressured fluid from and discharge pressurized fluid to the first and second meterless circuits. | 04-25-2013 |
20130098013 | CLOSED-LOOP SYSTEM HAVING MULTI-CIRCUIT FLOW SHARING - A hydraulic system is disclosed. The hydraulic system may have a plurality of pumps with unidirectional functionality and being variable displacement, a common discharge passage connected to the plurality of pumps, and a common intake passage connected to the plurality of pumps. The hydraulic system may also have at least one actuator connected in closed-loop manner to the common discharge and common intake passages, and a switching valve associated with the at least one actuator and disposed between the at least one actuator and the common discharge and intake passages. The hydraulic system may additionally have at least one isolation valve configured to selectively isolate a portion of the common discharge passage and a portion of the common intake passage associated with one pump of the plurality of pumps from another pump of the plurality of pumps. | 04-25-2013 |
20130098014 | CLOSED-LOOP HYDRAULIC SYSTEM HAVING FORCE MODULATION - A hydraulic system is disclosed. The hydraulic system may have a unidirectional variable displacement first pump, a first actuator connected to the first pump via a closed-loop first circuit, and a first switching valve disposed between the first actuator and the first pump. The first switching valve may be configured to control a fluid flow direction through the first actuator. The hydraulic system may also have a second actuator connected to the first pump in parallel with the first actuator via the first circuit, and a second switching valve disposed between the second actuator and the first pump. The second switching valve may be configured to control a fluid flow direction through the second actuator. The hydraulic system may further have a modulation valve associated with the first circuit and configured to selectively modulate a pressure of the first circuit during actuation of the first or second switching valves. | 04-25-2013 |
20130098015 | HYDRAULIC SYSTEM HAVING FLOW COMBINING CAPABILITIES - A hydraulic system hydraulic system includes a variable displacement pump, and a variable displacement first travel motor selectively fluidly connected to the pump in a closed-loop manner. The system also includes a first switching valve associated with the first travel motor and configured to selectively switch a flow direction of fluid passing through the first travel motor from the pump. The system further includes a variable displacement second travel motor selectively fluidly connected to the pump in a closed-loop manner. The system also includes a second switching valve associated with the second travel motor and configured to selectively switch a flow direction of fluid passing through the second travel motor from the pump. | 04-25-2013 |
20130098016 | Meterless Hydraulic System Having Flow Sharing and Combining Functionality - A hydraulic system includes a variable-displacement first pump, a variable-displacement second pump, and a first actuator selectively connected either to the first pump in a closed loop manner and not the second pump, or to the first and second pumps in a closed loop manner. The hydraulic system also includes a second actuator selectively connected either to the second pump in a closed loop manner and not the first pump, or to the first and second pumps in a closed loop manner. The hydraulic system further includes a variable-displacement rotary actuator selectively connected either to the first pump in a closed loop manner and not the second pump, or to the first and second pumps in a closed loop manner. | 04-25-2013 |
20130098017 | Hydraulic System - A method of controlling a hydraulic system includes providing fluid to a first actuator with a first pump via a first closed-loop circuit of a machine, and providing fluid to a second actuator with a second pump via a second closed-loop circuit of the machine. The method also includes providing fluid to a third actuator with a third pump via a third closed-loop circuit of the machine, and providing fluid to a fourth actuator with a fourth pump via a fourth closed-loop circuit of the machine. The method further includes forming a combined flow of fluid including fluid from the first circuit and fluid from at least one of the second, third, and fourth circuits, and directing the combined flow to the first actuator while providing fluid to the actuator of the at least one of the second, third, and fourth circuits. | 04-25-2013 |
20130098018 | HYDRAULIC SYSTEM - A hydraulic system includes a variable displacement first pump, a first linear actuator fluidly connected to the first pump via a first closed-loop circuit, a variable displacement second pump, and second and third linear actuators fluidly connected to the second pump in parallel via a second closed-loop circuit. The system also includes a variable displacement third pump, a fourth linear actuator fluidly connected to the third pump via a third closed-loop circuit, a variable displacement fourth pump, and a first rotary actuator fluidly connected to the fourth pump via a fourth closed-loop circuit. The system further includes a second rotary actuator fluidly connected to the second pump in parallel with the second and third linear actuators. The system also includes a third rotary actuator fluidly connected to the third pump in parallel with the fourth linear actuator. | 04-25-2013 |
20130098019 | Meterless Hydraulic System Having Flow Sharing and Combining Functionality - A hydraulic system includes a variable-displacement first pump and a variable-displacement second pump. The hydraulic system also includes a first actuator selectively connected either to the first pump in a closed loop manner and not the second pump, to the second pump in a closed loop manner and not the first pump, or to the first and second pumps in a closed loop manner. The hydraulic system further includes a second actuator and a variable-displacement rotary actuator that are each selectively connected either to the first pump in a closed loop manner and not the second pump, to the second pump in a closed loop manner and not the first pump, or to the first and second pumps in a closed loop manner. | 04-25-2013 |
20130098020 | Meterless Hydraulic System Having Flow Sharing and Combining Functionality - A hydraulic system includes a variable-displacement first pump, an over-center variable-displacement first travel motor selectively connected to receive fluid pressurized by the first pump in a closed loop manner, and an over-center variable-displacement second travel motor selectively connected to receive fluid pressurized by the first pump in parallel with the first travel motor in a closed loop manner. The hydraulic system also includes a linear actuator selectively connected to receive fluid pressurized by the first pump in parallel with the first and second travel motors in a closed loop manner. | 04-25-2013 |
20130104532 | HYSTAT DRIVE SYSTEM HAVING COASTING FUNCTIONALITY | 05-02-2013 |
20130111889 | Crawler Vehicle Drive Control System - A drive control system of a crawler vehicle has a lever, a hydraulic distributor for feeding pressurized oil over a feed line to a hydraulic actuator. The hydraulic actuator can engage and release a central clutch. A cable has a first end fixed to a rod of the hydraulic actuator, and a second end connected to the hydraulic distributor. The cable activates and deactivates the hydraulic distributor, depending on the position of the rod. A main pulley is integral with the lever about which the cable is wound. | 05-09-2013 |
20130111890 | HYDRAULIC START/STOP SYSTEM - A start/stop arrangement in a fluid system comprising a controllable pump unit for supplying fluid pressure to at least one implement; a prime mover connected to a transmission device arranged to drive the pump unit; wherein the pump unit is installed on an outgoing power take off and is arranged to supply fluid pressure to the implement fluid system, that the pump unit is arranged accumulate fluid pressure in the accumulator. The fluid system further comprises a controllable motor unit connected to a fluid accumulator; that fluid pressure from the accumulator is arranged to drive the motor unit; and that the motor unit is connected to the prime mover by an overrun clutch, wherein the motor unit is arranged to supply torque to and start the prime mover when at least one predetermined condition is fulfilled. The invention further relates to a method for controlling the start/stop arrangement. | 05-09-2013 |
20130125536 | System and method for energy recovery - An energy transfer system includes a power transfer mechanism, a first system, and a second system. The first system includes a first pump-motor operatively connecting the first system to the power transfer mechanism and a regenerative system operatively connected to the first pump-motor. The second system is operatively connected to the power transfer mechanism. Power is transferred between systems by the power transfer mechanism. A method of energy transfer is also provided. | 05-23-2013 |
20130125537 | SWIRL FLOW CONTROL SYSTEM FOR CONSTRUCTION EQUIPMENT AND METHOD OF CONTROLLING THE SAME - A swing flow control system for a construction machine is provided, which includes an engine; a plurality of actuators for working devices; a variable displacement hydraulic pump providing hydraulic pressure to the actuators for the working devices and the swing motor; an operation portion including an operation lever or a joystick and instructing movement of the plurality of actuators; a control valve supplying a flow rate of the hydraulic pump to the actuators and the swing motor by the operation portion; a working device position detection means, installed on one side of the actuator; an operation amount sensing means, connected to one side of the operation portion; and a flow controller including a flow setting unit and an output means for providing a control signal to a swash plate control device to receive a signal sensed by the operation amount sensing means. | 05-23-2013 |
20130133318 | HYDRAULIC TRAVEL DRIVE WITH A CLOSED HYDRAULIC CIRCUIT AND METHOD FOR OPERATING SUCH A TRAVEL DRIVE - A hydraulic travel drive includes a primary hydraulic machine and at least one secondary hydraulic machine connected in a closed hydraulic circuit via a first and a second working line. A first accumulator is connected via a first valve to the first working line and via a second valve to the second working line. A second accumulator is connected via a third valve to the first working line and via a fourth valve to the second working line. The four valves are non-proportional switching valves each having two defined switching positions. A method for operating the drive includes comparing the high pressure working line to the first accumulator. If pressure in the accumulator is lower than in the working line, the first accumulator is connected to the high pressure working line for charging until pressure in the accumulator corresponds to that of the working line. | 05-30-2013 |
20130133319 | AUTOMATED SHIFTING OF HYDRAULIC DRIVE SYSTEMS - A drive system for propelling a power machine over a support surface is disclosed. The drive system includes a hydraulic pressure source and a drive assembly. The drive assembly has a hydraulic motor in fluid communication with the hydraulic pressure source that is switchable between first and second displacement arrangements. A shift valve receives pressurized fluid from the hydraulic pressure source and provides a shift signal to the hydraulic motor to selectively cause the displacement of the hydraulic motor to shift between the first and second displacement arrangements. A sensing device capable of generating a load signal indicative of a load condition provided by the drive assembly is also provided. An electronic controller provides a control signal to the shift valve to control the displacement of the hydraulic motor in response at least in part due to the load signal. | 05-30-2013 |
20130145752 | METHOD OF USING A PUMP POSITION SENSOR FOR AN EBS PUMP CHECK - A method of performing a pump check for a brake system comprises determining a first position of a pump with a pump position sensor upon ignition of a vehicle. A pump motor is powered based upon a preselected operating condition. A second position of the pump is determined with the pump position sensor. The first position of the pump and the second position of the pump are compared. The pump motor is confirmed as operational when the second position of the pump is different from the first position of the pump. | 06-13-2013 |
20130145753 | Turbomachinery Having Self-Articulating Blades, Shutter Valve, Partial-Admission Shutters, and/or Variable-Pitch Inlet Nozzles - An axial-flow turbine assembly that includes one or more features for enhancing the efficiency of the turbine's operation. In one embodiment, the turbine assembly includes a turbine rotor having blades that adjust their pitch angle in direct response to working fluid pressure on the blades themselves or other part(s) of the rotor. In other embodiments, the turbine assembly is deployable in an application, such as an oscillating water column system, in which the flow of working fluid varies over time, for example, as pressure driving the flow changes. In a first of these embodiments, the turbine assembly includes a valve that allows the pressure to build so that the flow is optimized for the turbine's operating parameters. In a second of these embodiments, one or more variable-admission nozzle and shutter assemblies are provided to control the flow through the turbine to optimize the flow relative to the turbine's operating parameters. | 06-13-2013 |
20130145754 | Pressure Control System for a Hydraulic Lift and Flotation System - A control system is provided to control the rate of pressure rise in a hydraulic lift and flotation system. When a hydraulic cylinder of the hydraulic lift and flotation system is to be adjusted, the pressure in the hydraulic lift and flotation system has to be increased to a predetermined pressure controlled by a relief valve before the hydraulic cylinder can be operated. The unload valve of the hydraulic lift and flotation system can be closed in a controlled or regulated manner in order to control the rate at which pressure rises in the hydraulic lift and flotation system. | 06-13-2013 |
20130145755 | Device for compacting a granular mass such as concrete cement - An improved compacting device for compacting a granular, loosely coherent mass, such as soil-moist cement, for producing end products such as tiles, kerbstones and the like. The compacting device includes a vibrating table and a hydraulic exciter device for driving the vibrating table. The hydraulic exciter device includes a plurality of hydraulic exciters and is configured to drive the hydraulic exciters with excitation displacements of mutually substantially the same amplitude and frequency and in phase with one another. An improved hydraulic exciter for use in the improved compacting device, and the improved compacting device with a single improved exciter of this type are also described. | 06-13-2013 |
20130152564 | ELECTRONIC HILL HOLD CONTROL OF A HYDROSTATIC TRANSMISSION - A hill hold control system and method for a closed loop transmission of a machine is disclosed that includes performing the following steps while the transmission is in neutral: sensing motor shaft movement; and generating fluid flow to offset motor shaft movement and cause substantially zero shaft movement. The method can include comparing a brake timer to a delay value, and activating a brake when the timer exceeds the delay value. The method can include sensing when a brake is applied, and discontinuing the step of generating fluid flow to offset motor shaft movement when a brake is applied. Motor shaft movement can be sensed by sensing rotational speed. Generating fluid flow to offset motor shaft movement can include determining direction and magnitude of fluid flow as a function of the sensed movement; and adjusting the direction and magnitude of fluid flow based on recurring readings of the sensed movement. | 06-20-2013 |
20130152565 | HYDRAULIC SYSTEM HAVING ENERGY RECOVERY - A hydraulic system for a machine is disclosed. The hydraulic system may have a pump configured to pressurize fluid, a swing motor driven by pressurized fluid to swing a body of the machine relative to an undercarriage, and a first circuit fluidly connecting the pump to the swing motor. The hydraulic system may also have an energy recovery motor mechanically connected to the swing motor, at least one accumulator, and a second circuit fluidly connecting the at least one accumulator to the energy recovery motor. | 06-20-2013 |
20130152566 | FLUID FLEXIBLE CONTAINER PUMP - System for converting mechanical energy such as ocean power into fluid power which is directed to energy conversion systems or other purposes. Included are fluid inflatable containers arranged to receive mechanical energy from a plunger mounted on a shaft, such that the flexible wall of the container forms a rolling lobe in response to changes in volume, enclosed within a drum, said shaft running axially through the drum and coupled to the drum by bearings so that the drum and shaft may move in relation to one another, a vane runs longitudinally on the drum and extending radially from an attachment point at the inner surface of the drum to the surface of the shaft. The mechanical energy is connected directly or indirectly to either the shaft or to the drum. Mechanical forces cause the plunger to press into the fluid inflatable container expelling fluid and creating fluid flow. | 06-20-2013 |
20130152567 | Liquid gas power generation - The Lungie Pet Leash system uses an elastic material attached to a static control leash to: reduce and/or eliminate the effects of sudden impact, hyper-extension or other forces caused by a pet's movements; avoid being pulled off balance, or injured; prevent or lessen injury to a pet from sudden stopping during a full tilt run. | 06-20-2013 |
20130152568 | VALVE ACTIVATION IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, valve efficiency and reliability are enhanced via use of hydraulic or magnetic valve actuation, valves configured for increased actuation speed, and/or valves controlled to reduce collision forces during actuation. | 06-20-2013 |
20130152569 | Speed Control Strategy - A method for efficiently decelerating a vehicle having front and rear wheel brakes by isolating the rear wheel brakes and applying pressurized brake fluid only to the front wheel brakes. | 06-20-2013 |
20130160435 | PROCESS FOR THE PRODUCTION OF HYDRAULIC ENERGY AND PRODUCTION OF POTABLE WATER BY DIRECT OSMOSIS - The present invention relates to a process for the production of hydraulic energy by direct osmosis from two saline solutions having different concentrations made to pass through one or more modules of semipermeable membranes having a double inlet and outlet port, originally designed to execute the process of inverse osmosis, without a requirement to realise any technical modification to said modules of membranes. In this manner, an osmotic potential is produced in the membranes creating a current of solution having a pressure sufficient to produce hydraulic energy. A further object of the present invention is the installation designed to produce hydraulic energy according to the stated procedure and the use thereof, together with a desalination plant and a tertiary waste water treatment plant comprising the installation to produce hydraulic energy. | 06-27-2013 |
20130160436 | ELECTRO-HYDRAULIC TRACTION SUPPORT - A traction control system comprises a wheel hydraulic motor and pump assembly selectively connectable to a wheel for a vehicle to provide drive to the wheel. An electronic control unit is connected to a main hydraulic control valve to control fluid flow from the main hydraulic motor and pump assembly to the wheel motor and pump assembly. A high pressure accumulator and reservoir are fluidly connected to the main hydraulic motor and pump assembly to provide pressurized fluid to the system. | 06-27-2013 |
20130160437 | SYSTEMS AND METHODS FOR EFFICIENT PUMPING OF HIGH-PRESSURE FLUIDS FOR ENERGY STORAGE AND RECOVERY - In various embodiments, a mechanical assembly and/or storage vessel is fluidly coupled to a circulation apparatus for receiving pressurized heat-transfer fluid from an outlet at a first elevated pressure, boosting a pressure of the heat-transfer fluid to a second pressure larger than the first pressure, and returning heat-transfer fluid to an inlet at a third pressure. | 06-27-2013 |
20130167518 | Control Arrangement and Method for Activating a Plurality of Hydrualic Consumers - A control arrangement for supplying pressure medium to a plurality of consumers. A supply metering orifice and an individual pressure compensator are associated with each consumer of the plurality of consumers. The individual pressure compensator is adjusted via a central control unit. | 07-04-2013 |
20130167519 | Door Controller for Vehicles and Method for Actuating a Cylinder of a Vehicle Door - The invention relates to a door control system for vehicles, with a compressor ( | 07-04-2013 |
20130180235 | Elastic Hydraulic Accumulator/Reservoir System - The invention is a combination accumulator and reservoir which stores energy when the accumulator deforms from its original shape in response to the flow of a pressurized fluid from the reservoir. The stored energy is returned when the fluid flow is reversed and the accumulator discharges the fluid and returns to its original shape. At least one part of the novelty of the invention is that the accumulator and the fluid reservoir reside in the same housing such that the volume of each varies inversely. Accordingly, the invention is more compact and weighs less than conventional accumulators. Another feature of the invention is that fluid is located around the bladder accumulator to lubricate contact between the bladder and sides of the reservoir. | 07-18-2013 |
20130192216 | COMPRESSED GAS ENERGY STORAGE SYSTEM USING TURBINE - An energy storage system utilizing compressed gas as a storage medium, may include one or more turbines configured to convert energy in gas expansion and compression processes. One or more axial and centrifugal turbines may be used to store energy by compressing gas, and to recover energy from expanding gas. A plurality of orifices/nozzles may introduce a liquid into the gas as a heat exchange medium. Orifices/nozzles may be disposed on various surfaces of a turbine and/or in a separate mixing chamber flowing to a turbine. Structures of the turbine may be designed to mitigate damage caused by liquid injection, for example the turbine blades may be flexible and/or comprise impact-resistant materials. | 08-01-2013 |
20130199168 | Apparatus and Method for Recuperation of Hydraulic Energy - An apparatus for recuperation of hydraulic energy from an actuator comprises a first hydraulic machine having a first drive and a second hydraulic machine having a second drive mechanically coupled to the first drive. The first hydraulic machine is in hydraulic communication with an actuator, and the second hydraulic machine ( | 08-08-2013 |
20130205762 | AUXILIARY FLOW VALVE SYSTEM AND METHOD FOR MANAGING LOAD FLOW REQUIREMENTS FOR AUXILIARY FUNCTIONS ON A TRACTOR HYDRAULIC SYSTEM - A system and method for managing hydraulic fluid load flow requirements for a tractor having a single pump hydraulic system. The system and method controls an implement hydraulic system and an auxiliary implement hydraulic system using a single hydraulic pump. The auxiliary flow valve system and method of the present disclosure gives precedence to the auxiliary functions so as to maintain full function of the auxiliary device. It also may supply a reduced flow, less than the maximum available from the system hydraulic pump to the auxiliary device. The remaining flow is available to the implement hydraulic system, with full flow being available to the implement when no auxiliary function is used. It also provides the ability to use a closed center valve in a load sensing system by bleeding flow pressure from the auxiliary hydraulic system. | 08-15-2013 |
20130205763 | METHOD OF CONTROLLING HYDRAULIC MACHINE TO REDUCE TORQUE RIPPLE AND/OR BEARING SIDE LOAD - A hydraulic machine in which the volume of working fluid displaced by each cylinder is selectable on each cycle of working chamber volume by active control of one or more electronic valves has a controller configured to select specified groups of cylinders to repetitively carry out active cycles until a change in selection is made. The groups are selected to reduce torque ripple and/or bearing side load. The cam profile may be varied to further reduce torque ripple. | 08-15-2013 |
20130205764 | KINETIC ENERGY TRANSFER SYSTEM AND METHODS - Systems, methods and apparatus for subjecting high-pressure fluids to a fluid flow assembly that generates or extracts work/energy using a work producing machine. Kinetic energy from the work producing machine is converted to electricity using a generator or similar apparatus. | 08-15-2013 |
20130205765 | METHOD FOR CONTROLLING A HYDRAULIC SYSTEM OF A WORKING MACHINE - A method is provided for controlling a hydraulic system of a working machine. The hydraulic system includes a hydraulic machine for providing hydraulic fluid to one or more actuators of the working machine. The method includes receiving a signal requesting a pump pressure from the hydraulic machine based on the load pressure of a first actuator of the one or more actuators which first actuator has the highest load pressure of the one or more actuators, discriminating the pressure request from the first actuator provided that the first actuator is stalled due to overload or geometrical limitations, and controlling the hydraulic machine to provide to pump pressure based on the load pressure of a second actuator of the one or more actuators which second actuator is in operation and has the second highest load pressure of the one or more actuators, or, if no actuator in addition to the first actuator is present and in operation, controlling the hydraulic machine to provide a predetermined idle pump pressure. | 08-15-2013 |
20130213023 | HYDRAULIC SYSTEM HAVING LOW-SPEED OPERATING MODE - A hydraulic system is disclosed for use with a machine. The hydraulic system may have a tank, a motor with a fluid inlet and a fluid outlet, and a pump configured to draw fluid from the tank and discharge the fluid at elevated pressures to the motor. An output of the pump is adjustable to regulate a speed of the motor. The hydraulic system may also have a low-speed valve located between the fluid outlet of the motor and the tank. The low-speed valve may be configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. | 08-22-2013 |
20130213024 | HYDRAULIC DRIVE AND METHOD FOR CONTROLLING SUCH A HYDRAULIC DRIVE - A hydraulic drive and method for controlling such a drive includes two drive motors configured to be controlled by at least one continuously adjustable distribution valve. The two drive motors are configured as adjustable hydraulic machines. | 08-22-2013 |
20130213025 | Hydraulic Pressure Generator for a Vehicle Brake System, Vehicle Brake System Having Such a Hydraulic Pressure Generator, and Method for Operating the Hydraulic Pressure Generator - A hydraulic pressure generator for a vehicle brake system comprises a piston and a cylinder that movably accommodates the piston. The piston defines a first hydraulic chamber and a second hydraulic chamber in the cylinder on opposite piston sides, wherein each hydraulic chamber has a hydraulic inlet and a hydraulic outlet. An actuating unit is able to put the piston into a back-and-forth motion so that an intake stroke with regard to the first hydraulic chamber corresponds to a discharge stroke with regard to the second hydraulic chamber, and vice versa. | 08-22-2013 |
20130213026 | DRIVE CONTROL METHOD OF OPERATING MACHINE - In drive control of an operating machine configured to drive a structure by a hydraulic motor configured to be driven by operating oil supplied from a hydraulic pump an electric motor configured to cooperate with the hydraulic motor, a speed command generated based on a manipulation amount of a remote control valve configured to determine an operation amount of the structure is subjected to speed feedback control performed based on the actual rotation speed of the hydraulic motor and pressure difference feedback control performed based on an operating oil pressure difference between a suction port and discharge port of the hydraulic motor. With this, a tilting angle command is generated such that the operating oil, the amount of which is necessary at the actual rotation speed of the hydraulic motor, is ejected, and the tilting angle of the hydraulic pump is controlled. | 08-22-2013 |
20130227937 | RIDE CONTROL SYSTEM - A ride control system and method where the system includes first hydraulics for equalizing pressure between ride control accumulators and boom cylinder head side, and second hydraulics for providing low pressure drop connection between ride control accumulators and boom cylinder head side. When ride control is engaged, the first hydraulics equalizes pressure between ride control accumulators and boom cylinder head side to within a pressure threshold, then the second hydraulics provides the low pressure drop connection between ride control accumulators and boom cylinder head side. Ride control system can include third hydraulics for providing fluid connection between boom cylinder rod side and tank; where after first hydraulics equalizes pressure to within pressure threshold, then third hydraulics provides connection between boom cylinder rod side and tank. The ride control system can also monitor the condition of the ride control accumulators. | 09-05-2013 |
20130227938 | HYDROSTATIC ENERGY STORE - A drive includes a hydraulic machine configured to convert kinetic energy into hydraulic energy and a hydrostatic energy store configured to be charged by the hydraulic machine. The drive further includes a control device configured to control the preloading of the store as a function of an operating state of a device driven by the drive. A hydrostatic energy store for a drive of a device includes a hydraulic machine which converts kinetic energy into hydraulic energy and charges the store. The store further includes a control device configured to vary a preloading of the store as a function of an operating state of the device. A method for adapting a preloading of a hydrostatic energy store includes determining an operating state of the device, determining the optimum preloading as a function of the determined operating state, and setting the preloading. A control device controls the setting of the preloading. | 09-05-2013 |
20130227939 | HYDRAULIC SYSTEM FOR A SELF-PROPELLED WORKING MACHINE - A hydraulic system for a self-propelled agricultural working machine includes a variable displacement pump driven by an internal combustion engine ( | 09-05-2013 |
20130227940 | ENERGY CONVERSION FROM FLUID FLOW - A device for use in extracting energy from an incoming fluid flow is presented. The device comprises: an oscillator assembly mounted on a base, the oscillator assembly comprising: a main body for exposing to an incoming fluid flow; and a joining element attached to the main body and configured for anchoring the main body to the base and enabling oscillation of the main body with respect to the base; an operative flow affecting unit comprising at least one flow interacting element located in at least one location respectively on a surface of the main body, the operative flow affecting unit being configured and controllably operable for affecting a separation of streams of the fluid flowing over the surface of the main body; a control unit in communication with the operative flow affecting unit, the control unit being configured and operable for activating and deactivating of each of the at least one flow interacting element of the operative flow affecting unit according to a certain time pattern, the time pattern being selected such that interaction between the flow interacting element and fluid streams creates vortices in the fluid streams at a selected vortex formation frequency causing an increase in oscillation of the main body, thereby enabling conversion of motion from the oscillation into useful energy. | 09-05-2013 |
20130232962 | HYDRAULIC CONTROL FOR A VEHICLE POWERTRAIN - A hydraulic control system and method for controlling a hydraulic system of a vehicle powertrain is provided, which includes an accumulator arranged to accumulate fluid when an engine is turned on, to retain fluid when the engine is turned off, and to discharge fluid to the transmission when the engine is restarted. The accumulator is actively filled through a controlled valve, and it may also be filled passively, for example, via ball check-valve. The method of controlling the hydraulic system includes providing a fluid line pressure to the transmission by opening a fluid passage when the engine is turned on; opening a valve to actively accumulate fluid from the fluid line pressure into an accumulator; closing the valve to retain the fluid in the accumulator; and discharging the fluid from the accumulator to the fluid passage when the engine is restarted. | 09-12-2013 |
20130239558 | WORK VEHICLE AND METHOD FOR CONTROLLING A WORK VEHICLE - In a work vehicle, a control section increases the displacement of a hydraulic motor for travel when the drive circuit pressure becomes larger than a target pressure determined according to the engine rotational speed, and reduces the displacement of the hydraulic motor when the drive circuit pressure becomes smaller than the target pressure. The control section increases the target pressure of the hydraulic motor for travel when changing the matching point of the absorption torque curve of the hydraulic pump with respect to the output torque curve of the engine. | 09-19-2013 |
20130247551 | Centrifugal force harnessing system and power generation method - The disclosed invention is a description of the means to create a condition in which liquid matter (water as shown) is subjected to centrifugal force induced by rotating the water as it is circulated in a confined system at velocities sufficient to generate electrical power. The power generated by the system is used to maintain rotation of the entire system, continuously circulate the water within the rotating system and to deliver the surplus electrical energy for discretionary use. | 09-26-2013 |
20130255240 | Pressure Medium Supply Arrangement - A pressure medium supply arrangement for operating a pneumatic apparatus, comprises a pressure medium supply, a pressure medium connection, a vent connection and at least one pressure medium charging connection to the pneumatic apparatus, together with a suction line, a compressor line, a vent line and at least one pressure medium charging line. A charging apparatus is configured to simultaneously direct the pressurized pressure medium applied to the pressure medium charging connection, and the further pressure medium made available in the charging apparatus by the first compressor stage of a two-stage or multistage compressor, to the second compressor stage of the compressor. | 10-03-2013 |
20130255241 | METHOD FOR CONTROLLING FLOW RATE OF ATTACHMENT FOR CONSTRUCTION EQUIPMENT - A method of controlling a flow rate of an attachment for construction equipment of the present disclosure, in which an engine and a pump are connected to a control device to which various control information according to equipment characteristics, user setting information from an instrument panel, engine rpm adjustment information through an engine control dial, or the like is inputted, and an attachment is connected to the pump so as to perform specific work, includes selecting, on the instrument panel, an attachment to perform work and an optimum engine rpm according to the attachment; adjusting the flow rate by controlling an angle of a swash plate of the pump; and adjusting additionally a supply flow rate of the attachment by resetting an engine rpm when adjustment to the flow rate is necessary while performing the attachment work. | 10-03-2013 |
20130263583 | METHOD OF CONTROLLING THE FLOW RATE OF A VARIABLE CAPACITY HYDRAULIC PUMP FOR A CONSTRUCTION APPARATUS - Disclosed is a method of controlling the flow rate of a hydraulic pump, which controls the discharge flow rate in proportion to a manipulated amount of a manipulation lever operated by a user even when the discharge pressure of the hydraulic pump is varied. The method of controlling the flow rate of a variable capacity hydraulic pump for a construction apparatus according to the present invention includes: a first step of calculating the required flow rate of the variable capacity hydraulic pump according to a manipulated amount of a manipulation lever operated by a user; a second step of calculating the maximum discharge flow rate within a range equal to or less than a preset horsepower or torque of the variable capacity hydraulic pump corresponding to the pressure detected by a discharge pressure detecting sensor; and a third step of controlling the discharge flow rate of the variable capacity hydraulic pump in proportion to a manipulated amount of the manipulation lever within a range equal to or less than the maximum discharge flow rate set in the second step. | 10-10-2013 |
20130269329 | HYDRAULIC PRESSURE SYSTEM FOR A HYDRAULIC VEHICLE - A hydraulic system includes one or more hydraulic pumps, one or more hydraulic motors, a hydraulic tank, and fluid lines. The hydraulic system also includes one or more check valves fluidly connected to the hydraulic pumps and the hydraulic motors. The hydraulic system also includes one or more pilot-operated valves, operably coupled to the check valves by one or more pilot lines. The pilot-operated valves are configured to receive fluid pressure from the fluid lines, opening to allow hydraulic fluid to travel between fluid lines. | 10-17-2013 |
20130269330 | SYSTEMS AND METHODS FOR ENERGY STORAGE AND RECOVERY USING GAS EXPANSION AND COMPRESSION - In various embodiments, energy-storage systems are based upon an open-air arrangement in which pressurized gas is expanded in small batches from a high pressure of, e.g., several hundred atmospheres to atmospheric pressure. The systems may be sized and operated at a rate that allows for near isothermal expansion and compression of the gas. | 10-17-2013 |
20130276439 | HYDRAULIC PUMP SYSTEM AND METHOD OF OPERATION - A fluid management system includes a hydraulic main pump fluidly connected to a load, an accumulator fluidly connected to the hydraulic main pump, a secondary pump, a fluid preparation system fluidly connected between an outlet of the secondary pump and an inlet of the hydraulic main pump, a reservoir, and a valve system fluidly connecting the reservoir, an outlet of the hydraulic main pump, and the secondary pump inlet. The system is at least operable between a run mode, wherein the secondary pump and accumulator cooperatively maintain the pressure within the hydraulic main pump, and a charging mode, wherein the secondary pump pumps fluid into the accumulator until a threshold volume is reached. | 10-24-2013 |
20130276440 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 10-24-2013 |
20130291527 | Hydraulic Power Control System and Method - A method and apparatus for controlling a hydraulic power system that includes a hydraulic motor and a hydraulic pump configured to supply hydraulic fluid to the hydraulic motor is provided. A relief valve is provided that is configured to release hydraulic fluid from a location between the hydraulic pump and the hydraulic motor when a pressure of the hydraulic fluid exceeds a predetermined pressure. A controller is in communication with the hydraulic motor and the hydraulic pump. The controller is configured to determine a first hydraulic fluid flow across the relief valve and determine a desired maximum flow across the relief valve. The controller also can regulate one or both of the hydraulic pump and the hydraulic motor to control the first hydraulic fluid flow based on the desired maximum flow. | 11-07-2013 |
20130298541 | LOAD ENERGY ASSIST AND HORSEPOWER MANAGEMENT SYSTEM - A hydraulic circuit for lifting and lowering a load is disclosed. The hydraulic circuit may include a hydraulic pump, a fluid reservoir, a load-sense valve, and a hydraulic actuator having a first chamber and a second chamber. The hydraulic circuit may also include a first control valve assembly having first and second lowering positions, the valve being disposed between the hydraulic pump and the hydraulic actuator. A second control valve assembly may also be provided that is disposed between the first control valve assembly and the first chamber of the hydraulic actuator. In one embodiment, the second control valve assembly has a first position and a second position. In one embodiment, the load can be selectively lowered by the hydraulic circuit without use of the hydraulic pump when the first control valve assembly is in the first lowering position and the second control valve assembly is in the second position. | 11-14-2013 |
20130298542 | HYDRAULIC SYSTEM WITH RETURN PRESSURE CONTROL - A hydraulic system ( | 11-14-2013 |
20130305699 | VERSATILE KINETIC ENERGY RECOVERY DEVICE - Described herein is a device, process, and system for the transformation of kinetic energy from one form to a more appropriately useful form. The single inventive concept utilizes compressed fluid and has the ability to transform energy from traffic including motorized traffic, from wave or ocean power on or within the ocean, from any animate object which may activate it. Energy may also be harvested from machines in motion. | 11-21-2013 |
20130312397 | On Demand Displacement Control of Hydraulic Power System - A method and apparatus for controlling a hydraulic power system is provided that includes a hydraulic motor and a hydraulic pump configured to supply hydraulic fluid to the hydraulic motor. A relief valve is provided that is configured to release hydraulic fluid from a location between the hydraulic pump and the hydraulic motor when a pressure of the hydraulic fluid exceeds a predetermined relief pressure. Above a predetermined threshold pressure for the system, the displacement of the pump is adjusted to at least a minimum displacement that is based on a total demanded flow for the system that includes a desired flow of hydraulic fluid across the relief valve and a first hydraulic fluid flow consumed by the motor. | 11-28-2013 |
20130312398 | MULTIPLE-STAGED FLUID OPERATED ACTUATOR - A multiple-stage fluid operated actuator ( | 11-28-2013 |
20130318952 | METHOD FOR CONTROLLING A HYDRAULIC PUMP OF A WHEEL LOADER - The present disclosure relates to a method for controlling a hydraulic pump of a wheel loader, which drives a working machine as necessary, thereby improving the acceleration performance of and more particularly, to a method for controlling a hydraulic pump in order to improve acceleration performance of the wheel loader in a situation in which an injection amount of fuel is limited during an acceleration process of the wheel loader in accordance with stricter regulations on exhaust gas. | 12-05-2013 |
20130327028 | SYSTEM AND METHOD FOR SLURRY HANDLING - A system includes a slurry depressurizing system that includes a liquid expansion system configured to continuously receive a slurry at a first pressure and continuously discharge the slurry at a second pressure. For example, the slurry depressurizing system may include an expansion turbine to expand the slurry from the first pressure to the second pressure. | 12-12-2013 |
20130333364 | METHOD AND SYSTEM FOR CONTROLLING AN EXCAVATOR - A control for an excavator of the type having a plurality of hydraulic cylinders for moving excavator components such that digging is accomplished at a worksite with an excavator bucket or other excavator implement, includes a plurality of hydraulic control valves, each of which is associated with a respective one of the hydraulic cylinders for controlling the application of hydraulic fluid pressure to the respective one of the hydraulic cylinders, and a plurality of manually actuated joystick valves for supplying hydraulic fluid pressure to the respective hydraulic control valves to control the movement of the hydraulic cylinders. The control includes a sensor arrangement for sensing the position of one or more excavator components. | 12-19-2013 |
20130333365 | CONTROLLING METHOD AND SYSTEM FOR COMPRESSED AIR SUPPLY TO A PNEUMATIC NETWORK, IN PARTICULAR IN AN AIRCRAFT - A system for supplying compressed air to a pneumatic network includes a load compressor, an air supply and a power shaft driving the load compressor. The system also includes in an air outlet of such load compressor, a connecting channel connected, on the one side, with a channel connected with the pneumatic network and, on the other side, with an air discharge conduct towards an exhaust nozzle. Air flow rate bleed valves are controlled by a processing unit via servo-loops as a function of the pressure sensors and the speed sensor. | 12-19-2013 |
20130333366 | HYDRAULIC DEVICE FOR ACTUATING A CLUTCH - A hydraulic device, in particular for actuating a clutch, including a hydraulic working cylinder, which is arranged near the clutch and which is connected to a volumetric flow source via a hydraulic line. The volumetric flow rate of the volumetric flow source can be influenced by a control unit according to signals of the sensors associated with the hydraulic device. The volumetric flow source is formed by a combination of an electric motor and a pump arranged in a common housing. | 12-19-2013 |
20130340418 | Energy Storage Cylinder and Control System for a Moving Structural Member - An energy storage system is disclosed for use in a hydraulic system for moving a structural member such as a boom assembly. The system features at least one work cylinder and an additional energy storage cylinder that assists in raising and lowering functions by storing and withdrawing pressurized fluid from an accumulator. The pressurized fluid in the accumulator may be used for raising operations as well as digging and tamping operations. Further, the energy recovery features may be selectively disconnected during either a raising or lowering operation. | 12-26-2013 |
20140000250 | LIFTING SYSTEM AND LIFTING METHOD FOR JIB OF AN OPERATING MACHINE, AND AN OPERATING MACHINE THEREOF | 01-02-2014 |
20140000251 | SYSTEMS AND METHODS FOR EFFICIENT TWO-PHASE HEAT TRANSFER IN COMPRESSED-AIR ENERGY STORAGE SYSTEMS | 01-02-2014 |
20140007564 | POWER GENERATION BY PRESSURE RETARDED OSMOSIS IN CLOSED CIRCUIT WITHOUT NEED OF ENERGY RECOVERY - A method and apparatus for clean energy generation by means of Pressure Retarded Osmosis (PRO) in closed circuit by a batch process or by a consecutive sequential process comprises two sections; one of a disengaged Side Conduit (SC) undergoing replacement of High Salinity Diluted Concentrates (HSDC) by fresh High Salinity Feed (HSF); and the other of a close circuit system with 3 modules connected in parallel wherein Low salinity feed (LSF) is continuously supplied and whereas part of the HSDC is being recycled through said modules and the other part used for power generation by means of a fixed speed turbine (T) and 3 rated generators (G | 01-09-2014 |
20140013732 | BRAKE OR COUPLING SYSTEM AND METHOD OF OPERATING SUCH SYSTEM - The brake or coupling system ( | 01-16-2014 |
20140013733 | METHOD FOR SELECTIVELY CHARGING AND DISCHARGING A STEERING ACCUMULATOR - A system and method for selectively charging and discharging a steering accumulator are provided. One vehicle steering system includes a hydraulic pump configured provide a source of pressurized hydraulic fluid for use in steering the vehicle. The steering system also includes an accumulator configured to hold pressurized hydraulic fluid from the pump for use in steering the vehicle in case of need. The steering system includes a charging circuit configured to selectively allow the hydraulic fluid to flow from the hydraulic pump to the accumulator based on a fluid pressure applied by a first pilot and a second pilot. The steering system includes a charging bypass circuit configured to allow the hydraulic fluid to flow to a steering control unit and to bypass the charging circuit. The hydraulic pump supplies fluid to the charging circuit and the bypass circuit. | 01-16-2014 |
20140020368 | HYDRAULIC CIRCUIT FOR PROGRESSIVE ENGAGEMENT OF A HYDRAULIC DEVICE - The present invention relates to a hydraulic circuit comprising:
| 01-23-2014 |
20140020369 | ENERGY STORAGE SYSTEM AND METHOD FOR ENERGY STORAGE - An energy storage system that includes a compressor for compressing a gas, a thermal energy storage for cooling the gas coming from the compressor to a given temperature by heating a thermal storage medium to store thermal energy and a reservoir for storing the compressed gas. The energy system also includes a heat recuperator for further cooling the gas coming from the compressor and thermal energy storage below the given temperature by heating the gas supplied to the compressor. | 01-23-2014 |
20140020370 | CLOSED LOOP DRIVE CIRCUIT WITH OPEN CIRCUIT PUMP ASSIST FOR HIGH SPEED TRAVEL - The present disclosure refers to a hydrostatic drive system for a vehicle ( | 01-23-2014 |
20140020371 | METHOD FOR CONTROLLING AN AUTOMATED TRANSMISSION - A method of controlling an automated transmission for motor vehicles with one or several pressure activated positioning cylinders ( | 01-23-2014 |
20140020372 | INCREASED POWER IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY - In various embodiments, energy is stored or recovered via super-atmospheric compression and/or expansion of gas in conjunction with substantially adiabatic compression and/or expansion from or to atmospheric pressure. | 01-23-2014 |
20140026547 | ENERGY STORAGE SYSTEM AND METHOD FOR STORING ENERGY AND RECOVERING THE STORED ENERGY USING THE SYSTEM - There is provided an energy storage system. The system includes a storage tank, a reservoir connected to the storage tank configured to store fluid and exchange the stored fluid with the storage tank, at least one path configured to transfer the stored fluid between the storage tank and the reservoir, a pump configured to inject the stored fluid into the storage tank and compress air in the storage tank, and a generator configured to generate electricity by using the injected fluid transferred from the storage tank to the reservoir. | 01-30-2014 |
20140026548 | METHOD AND A DEVICE FOR REDUCING VIBRATIONS IN A WORKING MACHINE - A method for reducing vibrations in a working machine is provided. The working machine includes a hydraulic system with a hydraulic machine for providing hydraulic fluid to at least one working function. The hydraulic machine is driven by a drive source haying a variable speed of rotation. The method includes identifying a resonance frequency for the working machine, and controlling the drive source so as to counteract waves with the resonance frequency. | 01-30-2014 |
20140033690 | MACHINE HYDRAULIC SYSTEM HAVING FINE CONTROL MODE - A hydraulic system for a machine is disclosed. The hydraulic system may have a hydraulic actuator, and at least one valve configured to regulate fluid flows associated with the hydraulic actuator. The hydraulic system may also have an operator interface device configured to generate a position signal indicative of a desired movement velocity of the hydraulic actuator, a mode switch movable to generate a mode signal indicative of desired operation in one of a normal control mode and a fine control mode, and a controller. The controller may be configured to move the at least one valve to a first position based on the position signal when the mode signal indicates desired operation in the normal mode, and to move the at least one valve to a second position based on the position signal when the mode signal indicates desired operation in the fine control mode. | 02-06-2014 |
20140033691 | HYDRAULIC CIRCUIT CONTROL - A hydraulic circuit is provided. The hydraulic circuit includes a primary pump, a displacement actuator, a charge pump, a direction control valve, and a pressure control valve. The displacement actuator is associated with the primary pump. The charge pump is configured to generate a flow of a pilot fluid. The direction control valve is configured to control the flow of the pilot fluid to the displacement actuator to affect a movement direction of the displacement actuator. The pressure control valve is configured to control a pressure of the pilot fluid to affect a movement amount of the displacement actuator. Further, the hydraulic circuit includes a controller. The controller is configured to control the direction and the pressure control valves to adjust a displacement of the primary pump based at least on one of a sensed engine parameter or a mode of operation of the primary pump. | 02-06-2014 |
20140033692 | SYSTEM AND METHOD TO CHARGE AND DISCHARGE AN ACCUMULATOR - A method for charging an accumulator is disclosed. The method includes pumping pressurized fluid from an output port of a hydraulic pump to the accumulator to charge the accumulator, and flowing makeup fluid from a hydraulic actuator system to an input port of the hydraulic pump. | 02-06-2014 |
20140033693 | Reduced Parasitic Hydraulic Fan System with Reversing Capability - A method is provided for controlling a hydraulic system having at least an implement pump, a fan-steering-braking (FSB) pump, a valve assembly, a fan drive system and one or more accumulators. The method may determine an operational state of a power source associated with the hydraulic system, actuate one or more valves of the valve assembly such that the FSB pump charges the accumulators and operates at least the fan drive system if the power source is operating at less than maximum power, and actuate one or more valves of the valve assembly such that the accumulators operate at least the fan drive system and such that the FSB pump supplements the implement pump as needed if the power source is operating at maximum power. | 02-06-2014 |
20140041373 | HYDRAULIC SOFT START SYSTEM - A hydraulic soft-start system includes a first flow restricting orifice and a flow control valve both being in fluid communication with a pressure source and an inlet of a motor. Also provided is a second flow restricting orifice disposed between a pilot for actuating the flow control valve and the inlet of the motor. A first flow is passed from the pressure source via the first orifice to an inlet of the motor, placing the motor in a partially-actuated state. The flow control valve is actuated after a threshold pressure of the pilot is reached allowing a second flow to pass from the pressure source to the motor inlet. The second flow is higher than the first flow, thereby placing the motor in a fully-actuated state. | 02-13-2014 |
20140047824 | ELECTROHYDRAULIC CONTROLLER FEEDBACK SYSTEM AND METHOD - An electrohydraulic controller feedback system and method including an electrohydraulic operator controller and a feedback mechanism is disclosed. An operator controls a machine hydraulic function using the electrohydraulic operator controller, the feedback system senses a property of the hydraulic function, and generates tactile feedback in the electrohydraulic operator controller based on the sensed property. The electrohydraulic operator controller can be, for example, a joystick or control lever. The tactile feedback can be vibrations that vary based on the sensed property. The vibration can vary according to a profile relating the vibration amount to the sensed property. The profile can include portions of various shapes, for example, linear, exponential or parabolic, and can include breakpoints. The profile can include high sensitivity regions where small changes in the sensed property result in large vibration changes. | 02-20-2014 |
20140047825 | SYSTEMS AND METHODS FOR ENERGY STORAGE AND RECOVERY USING COMPRESSED GAS - The invention relates to methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator and at least one intensifier in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side of the circuits. | 02-20-2014 |
20140047826 | FLUID-FLOW CONTROL IN ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, compressed-gas energy storage and recovery systems feature one or more valves, which may be disposed within end caps of cylinder assemblies in which gas is expanded and/or compressed, for admitting fluid to and/or exhausting fluid from the cylinder assembly. | 02-20-2014 |
20140053541 | VEHICLE ENERGY STORAGE SYSTEM AND METHOD OF USE - Methods and systems for using compressed gas in a vehicle. The methods include generating mechanical energy by expanding stored compressed gas through a turbine-compressor and distributing the mechanical energy to the engine, motor-generator, or a wheel. The compressed gas vehicle system includes a flask connected to a turbine-compressor, which may be interconnected to the engine and the motor-generator. The system may also include an electric wheel-motor connected electrically to the motor-generator. | 02-27-2014 |
20140060017 | MULTI-ORIFICE BYPASS FOR A HYDRAULIC MOTOR ASSEMBLY - Apparatuses and systems that use a variable displacement motor-pump (VDMP) to control the position of a hose of an aerial refueling system are disclosed. At VDMP displacements greater than required to hold a position of the hose, the VDMP operates in a motor mode to retract the hose. For lesser VDMP displacements, the VDMP operates in a pump mode to control extension of the hose. In accordance with some embodiments, a dual orifice conveys hydraulic fluid at varying rates depending upon the VDMP operational mode. | 03-06-2014 |
20140060018 | HYDRAULIC CONTROL SYSTEM - A hydraulic control system includes an implement movable to perform an excavation cycle having a plurality of segments, a variable displacement motor configured to swing the implement at a desired speed during the excavation cycle, and a pump configured to pressurize fluid directed to drive the motor. The system further includes an accumulator configured to selectively receive fluid discharged from the motor via a charge valve, and to discharge fluid to the motor via a discharge valve. The system includes a selector valve fluidly connected to the charge valve and the discharge valve. The system also includes a controller configured to vary displacement of the motor, resulting in the desired speed. | 03-06-2014 |
20140060019 | INTEGRATED HYDRAULIC SUPPLY PUMP - A hybrid electric drive system including a hydraulic power system for a hybrid powered vehicle which includes a transmission, and a combustion engine and an electric motor both mechanically coupled to the transmission to provide engine and/or motor drive power for the vehicle. A plurality of hydraulic circuits communicate with an electrically driven hydraulic pump. The hydraulic pump is configured to provide fluid circulation to the plurality of hydraulic circuits. The hydraulic circuits are each connected to the transmission and other corresponding vehicle components. An electrical power supply is configured to power the electrically driven hydraulic pump, and the electrical power supply is electrically communicating with a rechargeable high voltage (HV) battery system. The electrically driven hydraulic pump communicates with the plurality of hydraulic circuits to provide fluid pressure in the hydraulic circuits. | 03-06-2014 |
20140060020 | HYDRAULIC CONTROL SYSTEM HAVING OVER-PRESSURE PROTECTION - A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The hydraulic system may also have a main relief valve movable away from a closed position to pass pressurized fluid to the tank when a pressure of the fluid directed to the actuator exceeds a first threshold pressure, and a controller in communication with the pump. The controller may be configured to selectively reduce a displacement of the pump after the main relief valve has moved away from the closed position when the pressure of the fluid directed to the actuator exceeds a second threshold pressure. | 03-06-2014 |
20140060021 | HYDRAULIC CONTROL SYSTEM HAVING SWING OSCILLATION DAMPENING - A hydraulic control system is disclosed. The hydraulic control system may have an input device to generate a first signal indicative of a desired swing motor movement, and a control valve configured to selectively pass fluid to the swing motor and drain from the swing motor to drive the swing motor based on the first signal. The hydraulic control system may also have a pressure sensor to generate a second signal indicative of a swing motor pressure, a speed sensor configured to a third signal indicative of a swing motor speed, and a controller configured to make a comparison of at least one of the swing motor speed and the swing motor pressure with a threshold speed and a threshold pressure, and open the control valve to drain fluid from the swing motor to the tank based on the comparison when the input device is in a neutral condition. | 03-06-2014 |
20140060022 | HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY - A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control. The hydraulic control system may further have an accumulator configured to receive fluid from and supply fluid to the swing motor, a charge valve movable to allow fluid flow from the swing motor into the accumulator, and a discharge valve movable to allow fluid flow from the accumulator to the swing motor. The hydraulic control system may additionally have a controller in communication with the at least one control valve, the charge valve, and the discharge valve. The controller may be configured to detect an acceleration of the swing motor, selectively cause the discharge valve to assist the acceleration, and selectively move the charge valve to an open position to recover energy associated with pressure spikes occurring during the acceleration. | 03-06-2014 |
20140060023 | HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY - A hydraulic control system is disclosed for use in a machine. The hydraulic control system may have a work tool, a motor configured to swing the work tool, a tank, a pump configured to draw fluid from the tank and pressurize the fluid, and a control valve operable to control fluid flow from the pump to the motor and from the motor to the tank via first and second chamber passages to affect motion of the motor. The hydraulic control system may also have an accumulator, and an accumulator circuit configured to selectively direct fluid discharged from the motor to the accumulator for storage and to direct stored fluid from the accumulator to the motor to assist the motor. The hydraulic control system may further have a selector valve configured to selectively connect a higher pressure one of the first and second chamber passages with the accumulator, and a single pressure relief valve disposed within the accumulator circuit and configured to relief pressure from opposing sides of the motor. | 03-06-2014 |
20140060024 | HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR RECOVERY - A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve, and a controller. The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating. | 03-06-2014 |
20140060025 | HYDRAULIC CONTROL SYSTEM HAVING ELECTRONIC FLOW LIMITING - A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank. The hydraulic control system may also have a pressure sensor to generate a first signal indicative of a pressure differential across the control valve, an operator input device to generate a second signal indicative of a desired movement of the actuator, and a controller. The controller may be configured to make a first determination of an opening amount of the control valve based on the second signal, and to make a second determination based on the first signal of whether the opening amount will result in overspeeding of the actuator. The controller may also be configured to reduce the opening amount based on the second determination. | 03-06-2014 |
20140060026 | WORK VEHICLE AND WORK VEHICLE CONTROL METHOD - A lock valve switching section switches a lock valve from a locked state to a released state when a lock member is switched from a locked position to a release position. An erroneous operation monitoring section maintains the lock valve in the released state when the pilot pressure is equal to or more than a predetermined pressure when elapsed time, which is from a point in time where the lock member is switched from the locked position to the release position, is equal to or more than the predetermined time. The erroneous operation monitoring section switches the lock valve to the locked state when the pilot pressure is equal to or more than the predetermined pressure when the elapsed time is less than the predetermined time. | 03-06-2014 |
20140060027 | SYSTEMS AND METHODS FOR REDUCING DEAD VOLUME IN COMPRESSED-GAS ENERGY STORAGE SYSTEMS - In various embodiments, dead space and associated coupling losses are reduced in energy storage and recovery systems employing compressed air. | 03-06-2014 |
20140069088 | Lift System With Follower System - A hydraulic lifting apparatus includes a main hydraulic cylinder and main hydraulic circuit operatively connected to the main hydraulic cylinder. First and second spaced apart follower hydraulic cylinders are also provided. A hydraulic lifting system includes first and second lift towers. Each lift tower includes a main hydraulic cylinder, a main hydraulic circuit, and at least one follower hydraulic cylinder. A follower hydraulic circuit is operatively connected to the at least one follower hydraulic cylinder. A lifting beam spans between the first and second lift towers. The main hydraulic cylinder of each tower is positioned along the beam axis. | 03-13-2014 |
20140075928 | HYDRAULIC CONTROL MANIFOLD ASSEMBLY - A hydraulic manifold assembly for hydraulic equipment is provided. The hydraulic manifold assembly includes a hydraulic manifold. The hydraulic manifold includes at least four control valves substantially disposed within the hydraulic manifold, at least three check valves substantially disposed within the hydraulic manifold, at least one control module, at least one control valve fluid line, and at least one check valve line. The hydraulic manifold assembly also includes at least one hydraulic cylinder, a hydraulic tank, and at least one hydraulic pump fluidly connected to the hydraulic manifold, and also fluidly connected to the hydraulic tank. | 03-20-2014 |
20140075929 | HYDRAULIC ANTI-CAVITATION SYSTEM - An anti-cavitation system for hydraulic equipment is provided. The anti-cavitation system includes at least one high pressure hydraulic pump, at least one secondary hydraulic pump, and a motor configured to provide power to the secondary hydraulic pump. The anti-cavitation system also includes at least one accumulator fluidly connected to the secondary hydraulic pump, at least one hydraulic manifold, a control module, and at least one anti-cavitation manifold fluidly connected to at least one accumulator, and also fluidly connected to at least one hydraulic manifold. | 03-20-2014 |
20140075930 | Over-Speed Control System and Method - A hydraulic power control system includes an engine driving a variable displacement pump. The variable displacement pump is fluidly connected to a first passageway and a second passageway, and has a selectively variable displacement that is adjustable in response to a pump displacement command signal. A hydraulic motor fluidly connected to the first and second passageways operates by a flow of hydraulic fluid originating from the pump. A controller receives an engine speed signal and adjusts pump displacement based on the engine speed signal to reduce the rotation speed of the pump when an overrun condition is present. | 03-20-2014 |
20140075931 | Energy trasfer and recycling open-closed hybrid system - In a Energy Transfer and Recycling Open-Closed Hybrid System, the combination comprising an outer sphere, an inner sphere located within and movable relative to the outer sphere, a shaft attached to the inner sphere, impulse generating means operatively connected to the inner sphere, and generating impulses, and springs located to transmit the impulses via the shaft to the outer sphere. Both spheres are partially filled with liquid, and partially filled with compressed air. The inner sphere is in liquid communication with the outer sphere, such that liquid within the space between the inner and outer spheres can flow into the interior of the inner sphere. The inner sphere includes jet impulse devices bolted to the equator. Rotation of the system causes liquid in liquid-delivery spiraling hoses in the northern hemisphere of the inner sphere to drop to the bottom of the inner sphere and to pass through liquid-conduits to be delivered to the jet impulse devices, in order to be ejected as reaction-mass into the space between the inner sphere and the outer sphere. The ejected reaction-mass can exert a vertical or horizontal force on the inner sphere, which imparts motion to the outer sphere by means of springs located to transmit the impulses via the shaft to the outer sphere, for transferring and recycling energy. | 03-20-2014 |
20140083087 | HYDRAULIC TANK PRESSURIZATION SYSTEM - A closed loop hydraulic system includes a hydraulic tank, a hydraulic power source, and an air pump. The hydraulic power source is in fluidly coupled to the hydraulic tank to draw the hydraulic fluid from the hydraulic tank. The air pump is in fluid communication with an air space in the hydraulic tank to pressurize the hydraulic tank. Further, a controller configured to receive a pressure signal from a pressure sensor associated with the hydraulic tank and regulate the hydraulic power source and the air pump based on the pressure signal. | 03-27-2014 |
20140083088 | METHOD AND SYSTEM FOR COMPENSATION OF AN INSUFFICIENT PRESSURE BUILDUP IN THE BRAKING SYSTEM OF A VEHICLE - A method is described for compensation of an insufficient pressure buildup in the braking system of a vehicle in the event of a failure or malfunction of a brake booster for brake force support when an actuating element of the braking system is actuated, the compensation occurring with the aid of a unit for an additional pressure buildup in the braking system and triggering of this compensation occurring as a function of a position of the actuating element in its adjustment travel. An instantaneous position of the actuating element in the adjustment travel is ascertained continuously or periodically, and the triggering and the additional pressure build-up occur as a function of this ascertained instantaneous position. Also described is a corresponding compensating system. | 03-27-2014 |
20140083089 | ENERGY MANAGEMENT SYSTEM FOR MACHINERY PERFORMING A PREDICTABLE WORK CYCLE - Industrial machines and methods of operating the same. One industrial machine includes at least one controller that is configured to (1) detect an occurrence of a regenerative work cycle segment within a repetitive work cycle performed by the industrial machine and including a plurality of work cycle segments and (2) modify operation of at least one power source included in the industrial machine for the regenerative work cycle segment (i.e., prior to and/or during the regenerative work cycle segment). | 03-27-2014 |
20140090365 | Apparatus and Method for Converting Movement into Energy - Apparatus for converting movement into energy, comprising a buoyant or floating body fully ( | 04-03-2014 |
20140096513 | Super Efficient Regulator - A system for producing mechanical energy. In some embodiments, the system includes a first source providing a first fluid, a fluid pressurization device, a second source supplying a second fluid, a first motor, and a second motor. The fluid pressurization device draws in the first fluid from the first source and increases the pressure of the first fluid. The first motor is driven by the second fluid, the second fluid decreasing in pressure and the first motor powering the fluid pressurization device as the second fluid passes through the first motor. The second motor receives a mixture of the first fluid from the first motor and the second fluid from the fluid pressurization device, whereby the second motor produces the mechanical energy. | 04-10-2014 |
20140102086 | METHOD AND SYSTEM FOR BRAKE CONTROL - Methods and systems are provided to reduce a hard brake pedal feel. A brake control variable is adjusted in anticipation of a hard pedal condition to increase hydraulic brake line pressure and maintain a normal pedal feel. A pedal force is inferred from brake line pressure relative to brake booster vacuum. | 04-17-2014 |
20140109560 | SOFT ROBOTIC ACTUATORS - A soft robotic device includes a flexible body having a width, a length and a thickness, wherein the thickness is at least 1 mm, the flexible body having at least one channel disposed within the flexible body, the channel defined by upper, lower and side walls, wherein at least one wall is strain limiting; and a pressurizing inlet in fluid communication with the at least one channel, the at least one channel positioned and arranged such that the wall opposite the strain limiting wall preferentially expands when the soft robotic device is pressurized through the inlet. | 04-24-2014 |
20140109561 | Wind To Electric Energy Conversion With Hydraulic Storage - A system for reversible storage of energy, the system comprising: means for generating energy; first conversion means for converting the energy into stored energy by means of low ratio (3.2:1 or less) high pressure (200 bar minimum) compression of gas; and second conversion means for converting the stored energy by expansion or reversal of the first process into usable energy. | 04-24-2014 |
20140109562 | EMERGENCY DRIVE FOR A CONSTRUCTION MACHINE AND METHOD FOR OPERATING THE EMERGENCY DRIVE - The present disclosure relates to an emergency drive for a construction machine, comprising a hydraulic motor which is connectable with a pump transfer gearbox of a drive of the construction machine via a first mechanical shaft and a port provided for this purpose. | 04-24-2014 |
20140109563 | METHOD AND APPARATUS FOR STORING ENERGY USING A COMBINED HEAT AND PRESSURE STORAGE DEVICE - A method for storing energy using a combined heat and pressure storage device, includes mixing a gaseous first component and a liquid second component in an initial first step at a first pressure/temperature point to form a working medium. The working medium is compressed in a following step in such a way that the working medium has a second pressure/temperature point, at which the second component is at least partially gaseous. The compressed working medium is led into the combined heat and pressure storage device and stored there. In order to recover the energy, the working medium is expanded, whereupon the second component is at least partially liquefied. An apparatus for implementing the method is also provided. | 04-24-2014 |
20140109564 | HEAT EXCHANGERS AND TOWER STRUCTURE FOR DENSITY-DRIVEN POWER GENERATION - A power-generating tower comprises: at least one of the lower heat-exchange assemblies, at least one of the upper heat-exchange assemblies, a tower structure arranged to support each upper heat-exchange assembly, at least one ascending circulating-fluid column within the tower structure, at least one descending circulating-fluid column within the tower structure, and at least one turbine. Each ascending column is arranged and connected to receive the circulating fluid from at least one of the lower heat-exchange assemblies and to convey the circulating fluid thus received upward and into at least one of the upper heat-exchange assemblies. Each descending column is arranged and connected to receive the circulating fluid from at least one of the upper heat-exchange assemblies and to convey the circulating fluid thus received downward and into at least one of the lower heat-exchange assemblies. The turbine is arranged to be driven by flow of circulating fluid. | 04-24-2014 |
20140116038 | HYDRAULIC SYSTEM WITH OPEN LOOP ELECTROHYDRAULIC PRESSURE COMPENSATION - A hydraulic system has a pump that furnishes pressurized fluid to a supply node connected to a plurality of functions. Each function includes hydraulic actuator and a control valve assembly through which fluid flows both from the supply node to the hydraulic actuator and from the hydraulic actuator to a return line. A control method involves receiving a plurality of commands, each designating desired operation of a function. Each command is separately used to derive a flow value designating an amount of flow for the respective function, a load value indicating a load magnitude related to the respective function, and a pressure value denoting a supply pressure for the respective function. Then, the control valve assembly for each given hydraulic function is operated in response to the flow and load values for that function and in response to the pressure value that is greatest among the plurality of functions. | 05-01-2014 |
20140116039 | APPARATUS FOR CONTROLLING/REGULATING THE TRAVEL SPEED OF A UTILITY VEHICLE AND METHOD FOR SAME - The present disclosure relates to an apparatus for controlling/regulating the travel speed of a utility vehicle comprising at least one drive motor, at least one hydraulic pump, at least one control slide valve, at least one hydraulic travel motor, at least one further hydraulic drive, as well as at least one controller. In accordance with the present disclosure, the travel speed of the at least one hydraulic travel motor is controlled/regulated via at least the speed of the drive motor, while the at least one further hydraulic drive does not provide any drive power. | 05-01-2014 |
20140123633 | ENERGY RECOVERY METHOD AND SYSTEM - The object of the present invention is to provide an inventive energy recovery method for a hydraulic system comprising a hydraulic cylinder ( | 05-08-2014 |
20140123634 | HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM - A hydraulic system for a working machine includes a hydraulic actuator and a first hydraulic machine for supplying fluid to the hydraulic actuator. The hydraulic system further includes a hydraulic transformer for supplying fluid to the hydraulic actuator in parallel with the first hydraulic machine, and an accumulator for fluid. The hydraulic transformer includes a first port and a second port and the transformer is adapted to transform a first pressure and a first flow at the first port to a second pressure and a second flow at the second port. The second port of the hydraulic transformer is in fluid communication with the hydraulic actuator and the first port is in communication with the accumulator. | 05-08-2014 |
20140123635 | DEVICE TO ACTUATE A FLUID CONNECTOR CONTAMINATION COVER - A device to actuate a contamination cover on a machine bracket, the device comprising a master cylinder positioned on the machine bracket; a first slave cylinder positioned on the machine bracket and connected to the contamination cover; and a closed master-slave circuit connecting the master cylinder to the slave cylinder wherein the actuation of the master cylinder drives the slave cylinder for the transition of the contamination cover from a close to an open position. | 05-08-2014 |
20140130484 | PRESSURE MEDIUM SYSTEM, IN PARTICULAR HYDRAULIC SYSTEM - The invention relates to a pressure medium system, in particular a hydraulic system, having a fluid pump for delivering a drive fluid with a certain delivery flow rate and a certain fluid pressure, and having a control unit which switches the fluid pump on or off in order to set a predefined setpoint value of the fluid pressure, wherein the fluid pump exhibits an inertia-induced overrun when switched off, such that during the overrun of the fluid pump, the fluid pressure still rises while the fluid pump has already been switched off. It is proposed that, during the increase of the fluid pressure to the predefined setpoint value, the control unit switches the fluid pump off before the fluid pressure has reached the predefined setpoint value. The invention also includes a corresponding operating method. | 05-15-2014 |
20140130485 | COMPRESSED AIR ENGINE - An air engine system includes an electric motor coupled to the drive shaft of an air engine to control the speed of the air engine. An accelerator controls the speed of the electric motor, which in turn controls the speed of the air engine. The air engine uses compressed air from a compressed air source provided by an air compressor. The air engine may be used on a vehicle, providing a clean environmentally-friendly means of locomotion. | 05-15-2014 |
20140137544 | BRAKE BOOSTER FAULT DIAGNOSTICS - Methods and systems for indicating brake booster degradation when braking is suspended may include comparing expected brake booster vacuum with measured brake booster vacuum, and indicating a fault when the difference between the two values exceeds a threshold. In one example, the expected brake booster vacuum is computed differently depending on whether intake manifold vacuum or vacuum from one or more vacuum-powered pumps dominates evacuation of the brake booster. Expected brake booster vacuum may be computed based on expected brake booster mass air flow and brake booster volume; when measured brake booster vacuum is less than intake manifold vacuum, expected brake booster mass air flow may be computed as a function of intake manifold vacuum and measured brake booster vacuum, whereas expected brake booster mass air flow may be computed based on flow characteristics of the pump(s) when measured brake booster vacuum is not less than intake manifold vacuum. | 05-22-2014 |
20140137545 | HYDRAULIC SYSTEM FOR PROVIDING AUXILIARY DRIVE TO A POWERTRAIN AND A HYDRAULIC CIRCUIT - This disclosure is directed towards a hydraulic system for providing auxiliary drive to a powertrain ( | 05-22-2014 |
20140144128 | BRAKE BOOSTER ASSISTANCE - Systems and methods for a vehicle brake booster having first and second chambers separated by a diaphragm coupled to a brake pedal are provided. In one example approach, a method comprises applying an exhaust pressure from a vacuum pump to a first chamber of the brake booster, and applying a vacuum pressure from the vacuum pump to a second chamber of the brake booster. | 05-29-2014 |
20140144129 | WORK VEHICLE AND WORK VEHICLE CONTROL METHOD - A pump displacement control cylinder is configured to control the displacement of a hydraulic pump according to pressure of hydraulic fluid and switches the discharge direction of the hydraulic fluid from the hydraulic pump according to the supply direction of the hydraulic fluid to the pump displacement control cylinder. A forward and backward progression switching valve is configured to switch the supply direction of the hydraulic fluid to the pump displacement control cylinder. A pressure control valve is configured to control the pressure of the hydraulic fluid supplied to the pump displacement control cylinder according to a command value input to the pressure control valve. A control section is configured to execute pump shuttle control which reduces the command value to the pressure control valve when switching between forward and backward progression using a forward and backward progression operation member. | 05-29-2014 |
20140144130 | ARRANGEMENT FOR CHARGING AN ACCUMULATOR - An arrangement for charging an accumulator with hydraulic fluid is provided. The accumulator is used in a hydraulic boom suspension system for a lift arm of a vehicle and the arrangement includes a first hydraulic pump arranged to supply hydraulic fluid to a hydraulic cylinder system of the lift arm, and a second hydraulic pump arranged to supply hydraulic fluid to a second hydraulic system. The second hydraulic pump is further arranged to supply hydraulic fluid for charging the accumulator. | 05-29-2014 |
20140150415 | Energy Recovery Hydraulic System - A method and system for accumulating and using recovered hydraulic energy that includes a hydraulic actuator and a pump configured to supply pressurized fluid to the hydraulic actuator. An energy recovery system includes a hydraulic motor, a charge valve and an accumulator configured to store fluid from the hydraulic actuator. The charge valve is operatively connected between the hydraulic actuator and the accumulator and between the accumulator and the hydraulic motor and is configured to place the hydraulic actuator in fluid communication with the accumulator and to place the accumulator in fluid communication with the hydraulic motor. A directional valve is operatively connected between the pump and the hydraulic actuator. The directional valve is configured to place the pump in fluid communication with the hydraulic actuator and to direct the flow of hydraulic fluid exiting the hydraulic actuator to the charge valve in an energy recovery mode. | 06-05-2014 |
20140150416 | HYDRAULIC ACTUATOR DAMPING CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - Disclosed is an actuator damping control system for reducing shocks imparted to a hydraulic actuator caused by a change in load resulting from an abrupt manipulation of a boom or other working device. The hydraulic actuator damping control system for construction machinery according to one embodiment of the present invention comprises: first and second supply passages both supplying a hydraulic flow from a hydraulic pump to an inlet of an actuator; first and second discharge passages, both of which return the hydraulic flow from the actuator to a hydraulic tank; a first meter “in” control valve and a first meter “out” control valve for controlling the hydraulic flow supplied from the hydraulic pump to the actuator inlet and the hydraulic flow returned from the actuator outlet to the hydraulic tank, respectively, in order to control the actuator in a direction; a second meter “in” control valve and a second meter “out” control valve for controlling the hydraulic flow supplied from the hydraulic pump to the actuator inlet and the hydraulic flow returned from the actuator outlet to the hydraulic tank, respectively, in order to control the actuator in another direction; and a controller for outputting control signals for opening either the first or second meter “in” control valve according to the degree to which a joystick is manipulated and the load on the actuator, and for opening either the first or second meter “out” control valve when the load on the actuator exceeds a reference value. | 06-05-2014 |
20140165546 | System and Method for Controlling Hydraulic Fluid Flow - A system and method for controlling fluid flow through a hydraulic valve in a work machine is disclosed. The system and method may include receiving an input command by a controller configured to control a fluid flow to an actuator, the input command generated by an input controller. The system and method may also include receiving a parameter indicative of pump flow by the controller, determining a first valve command corresponding to the input command and determining a second valve command based upon the parameter that achieves the fluid flow to the actuator corresponding to the first valve command. | 06-19-2014 |
20140165547 | SYSTEM AND METHODS FOR CONTROLLED LOWERING AND LIFTING OF A LOAD - A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered. | 06-19-2014 |
20140174063 | HYDRAULIC SYSTEM FOR CONTROLLING A WORK IMPLEMENT - A hydraulic system includes a cylinder assembly with a rod, a pressurized fluid source, a fluid tank, and a control valve. The control valve is fluidly connected to the cylinder assembly. The hydraulic system also includes a line relief, first makeup valve, and second makeup valve fluidly connected to a head end of the cylinder assembly. The second makeup valve is configured to provide fluid flow to the head end of the cylinder assembly when the rod is urged toward an extended position and the control valve is in a neutral position. | 06-26-2014 |
20140174064 | HYDRAULIC CONTROL SYSTEM FOR SWING MOTOR - A hydraulic control system for a machine is disclosed. The hydraulic control system includes a swing control valve coupled between the swing motor, the pump and the tank to selectively control a fluid flow between the pump and the swing motor. The hydraulic control system includes a first conduit coupled between a first port of the swing control valve and a first chamber port of the swing motor. Further, a second conduit is coupled between a second port of the swing control valve and a second chamber port of the swing motor. A first chamber valve and a second chamber valve coupled to the first conduit and the second conduit and movable between a first open position, a second open position and a closed position. A controller is configured to selectively move one of the first and second chamber valves to reduce the fluid flow between the swing motor and the tank such that the pressurized flow discharged from the swing motor is directed to an accumulator fluidly coupled to each of the first and second conduits. | 06-26-2014 |
20140174065 | HYDRAULIC CONTROL SYSTEM FOR SWING MOTOR - A hydraulic control system for a machine is disclosed. The hydraulic control system includes a swing control valve coupled between the swing motor, the pump and the tank to selectively control a fluid flow between the pump and the swing motor. The hydraulic control system includes a first conduit coupled between a first port of the swing control valve and a first chamber port of the swing motor. Further, a second conduit is coupled between a second port of the swing control valve and a second chamber port of the swing motor. A first chamber valve and a second chamber valve coupled to the first conduit and the second conduit. A controller is configured to selectively move one of the first and second chamber valves to reduce the fluid flow between the swing motor and the tank such that the pressurized flow discharged from the swing motor is directed to an accumulator fluidly coupled to each of the first and second conduits. | 06-26-2014 |
20140174066 | CONTROL SYSTEM FOR A MACHINE WITH A DUAL PATH ELECTRONICALLY CONTROLLED HYDROSTATIC TRANSMISSION - A control system for a machine with a dual path electronically controlled hydrostatic transmission is used to achieve a desired performance and a desired operator feel while performing all of the machine operations. The control system includes pump and motor displacement resolvers, command resolver, ramping blocks, pump and motor steering resolvers, engine load management and a straight tracking subsystem. | 06-26-2014 |
20140174067 | RAMPING SUBSYSTEM FOR A MACHINE WITH A DUAL PATH ELECTRONICALLY CONTROLLED HYDROSTATIC TRANSMISSION - A ramping subsystem of a control system for a dual path electronically controlled hydrostatic transmission is used to modify the commanded rate of change of pump and motor acceleration, deceleration and direction change command (performed to command machine motion from forward to reverse or vice versa) in order to achieve desired machine performance and operator feel. Pump and motor acceleration, deceleration and direction change command rates are then further modified using scaling tables based on selected maximum machine speed using operator input device. | 06-26-2014 |
20140182277 | Electro-Hydraulic Steering System with Spool-Based Steering Event Detection - An electro-hydraulic steering system for an articulated machine includes an electrical circuit and a hydraulic circuit. The electrical circuit includes a controller, an electro-hydraulic valve assembly, and a spool position system. The hydraulic circuit includes a pump, at least one cylinder in selective fluid communication with the pump, and the valve assembly. The controller includes a computer-readable storage medium storing a steering system monitoring application which performs several steps. A desired flow of pressurized fluid to each cylinder and a desired spool position for the spool of the electro-hydraulic valve assembly, based upon the desired flow of pressurized fluid, are determined. The desired spool position and an actual spool position are compared to determine a spool-based flow error, which is summed over a period of time to determine a cumulative spool-based flow error. An event warning is issued when the cumulative spool-based flow error exceeds a threshold. | 07-03-2014 |
20140182278 | POWER GENERATION FROM ATMOSPHERIC AIR PRESSURE - An apparatus and method is provided for generating net energy by converting the natural pressure of atmospheric air into kinetic energy, which is then converted to mechanical energy by a turbine, which can then be converted to electric energy through a generator. The method relies on natural physical phenomena such as Entrainment, Inducement and the Venturi Effect to increase the mass and velocity of air flowing through an enclosed chamber without increasing the amount of energy consumed to increase the air flow mass and velocity. A turbine-generator apparatus connected to the chamber is driven by the air flow to generate electric power which is greater than the power consumed to generate the initial air flow. Power is generated through extraction of kinetic energy from natural atmospheric air pressure energy. | 07-03-2014 |
20140182279 | SHOVEL AND METHOD OF CONTROLLING SHOVEL - A shovel includes a plurality of hydraulic actuators including a first hydraulic actuator and a second hydraulic actuator, a main pump, a hydraulic pump-motor configured to function as a hydraulic motor by using hydraulic oil flowing out of the first hydraulic actuator and configured to function as a hydraulic pump, a control valve configured to control a flow of the hydraulic oil in the plurality of hydraulic actuators, a first oil passage to connect the main pump with the second hydraulic actuator through the control valve, and a second oil passage to connect the hydraulic pump-motor with the second hydraulic actuator. The second oil passage meets the first oil passage between the control valve and the second actuator. | 07-03-2014 |
20140182280 | PARALLEL CYCLE FOR TIDAL RANGE POWER GENERATION - A parallel cycle process of extracting energy from the rise and fall of the ocean tides utilizes a marine enclosure capable of supporting a differential head, equipment capable of using a differential fluid head to generate electricity and equipment capable of pumping against a differential head to generate power from the rise and fall of ocean tides in a manner that preserves and maintains sensitive intertidal zones. | 07-03-2014 |
20140190152 | SYSTEMS AND METHODS FOR COMPRESSING AND/OR EXPANDING A GAS UTILIZING A BI-DIRECTIONAL PISTON AND HYDRAULIC ACTUATOR - Systems, methods and devices for optimizing bi-directional piston movement within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include a first pneumatic cylinder, a second pneumatic cylinder, a hydraulic actuator, and a hydraulic controller. The first pneumatic cylinder has a first working piston disposed therein for reciprocating movement in the first pneumatic cylinder and the hydraulic actuator is coupled to the first working piston. The second pneumatic cylinder has a second working piston disposed therein for reciprocating movement in the second pneumatic cylinder. The hydraulic controller is fluidically coupleable to the hydraulic actuator and is operable in a compression mode and an expansion mode. | 07-10-2014 |
20140190153 | DRIVE CONTROL METHOD AND SYSTEM FOR OPERATING A HYDRAULIC DRIVEN WORK MACHINE - A system and a method for operating a hydraulic driven work machine including a hydraulic travel motor having a variable displacement is provided, wherein a flow of hydraulic fluid generated by a hydraulic pump is provided to the travel motor and wherein a control valve is provided for controlling the flow of hydraulic fluid from the hydraulic pump to the travel motor. The hydraulic pump is provided with a hydraulic control depending on a load signal generated by the travel control valve and the travel motor is provided with an electric control according to a desired driving behaviour. | 07-10-2014 |
20140202145 | Control Device and Control Method of Electric Booster - A control device and a control method of an electric booster include an assist function by an electrical actuator. An input piston of the electric booster moves along an axial direction within the booster piston in response to an operation of a brake pedal. During a brake operation, the control device controls an electric motor to integrally move the input piston and the booster piston while retaining a length of a gap between the input piston and the booster piston. In addition, when starting an internal-combustion engine, the control device performs a control of shortening the length of the gap to prepare for a decrease in power supply voltage of the electric motor. Therefore, a force in a return direction applied to the input piston from the booster piston in association with a power supply drop is suppressed, and causing a driver to feel a sense of discomfort is suppressed. | 07-24-2014 |
20140208728 | Method and Hydraulic Control System Having Swing Motor Energy Recovery - A hydraulic control system includes a swing control valve between a pump and a swing motor to control flow to/from the swing motor, and a selector valve between an accumulator and the swing motor to regulate fluid flow. A controller is configured to receive inputs indicative of the pressure differential between the accumulator and conduit between the pump and swing motor, and a swing motor command, calculate a target swing motor flow based on the swing motor command input, and modulate operation of the swing control valve and the selector valve to regulate a swing speed. | 07-31-2014 |
20140208729 | Downhole Control System Having a Versatile Manifold and Method for Use of Same - A downhole control system for actuating hydraulically controlled devices positioned in a well. The system includes a first set of N hydraulically controlled devices positioned in the well and a second set of at least one hydraulically controlled device positioned in the well. A common control line is ported to a first side of each of the hydraulically controlled devices in the first set. N control lines are each ported to a second side of one of the hydraulically controlled devices in the first set. A first control line of the N control lines is ported to a first side of a first hydraulically controlled device of the second set and a second control line of the N control lines is ported to a second side of the first hydraulically controlled device of the second set, such that N+1 control lines are operable to actuate N+1 hydraulically controlled devices. | 07-31-2014 |
20140208730 | High Output Modular CAES (HOMC) - A compressed air energy storage system integrated with a source of secondary heat, such as a simple cycle gas turbine, to increase power production and to provide power regulation through the use of stored compressed air heated by said secondary heat to provide power augmentation. | 07-31-2014 |
20140208731 | SYSTEMS AND METHODS FOR ACTUATING SOFT ROBOTIC ACTUATORS - Systems and methods for providing a soft robot is provided. In one system, a robotic device includes a flexible body having a fluid chamber, where a portion of the flexible body includes an elastically extensible material and a portion of the flexible body is strain limiting relative to the elastically extensible material. The robotic device can further include a pressurizing inlet in fluid communication with the fluid chamber, and a pressurizing device in fluid communication with the pressurizing inlet, the pressurizing device including a reaction chamber configured to accommodate a gas-producing chemical reaction for providing pressurized gas to the pressurizing inlet. | 07-31-2014 |
20140216021 | SYSTEMS AND METHODS FOR GENERATING POWER EMPLOYING VES AIR SUPPLY STORED ENERGY - The present invention relates to a generation system for converting compressed air in a passive main control room habitability system to energy when the main control room habitability system is activated during an accident scenario in a nuclear reactor power plant. The system includes a pressure regulator for reducing the pressure of the compressed air to produce reduced pressurized air, an eductor to deliver air to the control room, and piping to connect the tank to the pressure regulator and the eductor to allow the flow of compressed air therein. The generation system includes a mechanism positioned upstream of the eductor for receiving the reduced pressurized air from the pressure regulator and converting at least a portion of said reduced pressurized air into energy. | 08-07-2014 |
20140216022 | Compressed Air Energy Storage System and Method - A compressed air energy storage system comprises a high-pressure water apparatus, a low-pressure water apparatus coupled to the high-pressure water apparatus through two channels, wherein a first channel is formed by a pumped hydroelectric power generation unit, a first high-pressure pipe and a first low-pressure pipe and a second channel is formed by a gas-water energy exchange unit, a second high-pressure pipe and a second low-pressure pipe and a compressed gas storage unit coupled to the gas-water energy exchange unit. | 08-07-2014 |
20140230420 | ENERGY RECOVERY SYSTEM FOR HYDRAULIC MACHINE - An energy recovery system is disclosed for use with a hydraulic machine. The energy recovery system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and an actuator control valve movable to direct pressurized fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The energy recovery system may also have a motor mechanically connected to a rotary device and configured to selectively receive fluid discharged from the actuator, and at least one valve movable to selectively redirect fluid exiting the motor back to the actuator. | 08-21-2014 |
20140230421 | VELOCITY GRADIENT FLOATING TURBINE AND POWER GENERATION SYSTEM AND METHODS THEREOF - The present invention in a preferred embodiment provides systems and methods for a velocity gradient floating turbine and power generation, comprising:
| 08-21-2014 |
20140238007 | Hydraulic Ride Control System - A hydraulic system is provided including a hydraulic actuator having a first chamber. A pump is configured to supply pressurized fluid to the hydraulic actuator. A balancing valve is configured to be operable in a balancing mode to equalize pressure in an accumulator and the first chamber of the hydraulic actuator. An activation valve is configured to be operable in a ride control mode to place the first chamber of the hydraulic actuator in communication with the accumulator. A flow control valve is configured to block flow from the pump when a flow rate from the pump exceeds a predetermined amount. | 08-28-2014 |
20140250876 | METHOD AND APPARATUS FOR OPERATING AN ENGINE ON NATURAL AIR - The present invention relates to an engine that runs on natural air pressure, more particularly to a method and apparatus for operating a vehicle engine on natural air pressure in order to alleviate problem of pollution. The present invention provide a reliable method and apparatus for operating an engine with a natural air with appropriate pressure which is effective to deliver a constantly increasing amount of natural air to an engine as the speed of the engine increases which is readily adaptable to a standard internal combustion engine to convert the internal combustion engine for operation with a natural air. | 09-11-2014 |
20140260221 | HYDROSTATIC DRIVE SYSTEM - A hydrostatic drive system for a machine is disclosed. The hydrostatic drive system includes a pump, a hydraulic motor configured to receive a pressurized fluid from the pump and a controller operably connected to the pump and the hydraulic motor. The controller is configured to receive an input signal indicative of a current machine speed and a desired machine speed. Further, the controller is configured to output a motor displacement command signal and a pump displacement command signal to adjust a displacement of the hydraulic motor and the pump respectively based on the input signal to maintain at least one of constant machine speed or constant acceleration or constant deceleration during adjustment of the pump displacement and the motor displacement. | 09-18-2014 |
20140260222 | Hydraulic Regeneration System and Method for a Material Handling Vehicle - A hydraulic system has a cylinder and ram assembly that raises and lowers a load carrying carriage on a material handling vehicle. The fluid exhausting from the cylinder, while the carriage is lowering, is controlled to recover energy from that fluid. A first path routes the exhausting fluid to drive the pump as a hydraulic motor. A second path routes the exhausting fluid to a reservoir, bypassing the pump. In a first lowering mode, the second path is closed and the first path is opened. In a second lowering mode, both the first and second paths are open and the flow through each one is proportionally controlled. In a third lowering mode, only the second path is opened. The mode to use is selected based on the desired lowering speed of the carriage. | 09-18-2014 |
20140260223 | System And Method For Controlling Pump Performance In A Transmission - The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump. | 09-18-2014 |
20140260224 | Control System for Variable Displacement Hydraulic Motor - A control system for a variable displacement hydraulic motor. A movable element is movable to adjust the operating displacement of hydraulic fluid through the motor. A positioning actuator moves the movable element between first and second positions to cause maximum and minimum operating displacement of the motor. A range limiting actuator positions a movable stop in a desired position, such that the movable stop interengages the movable element to cause motor displacement between the maximum and minimum operating displacements. The control system thus operates the motor in at least three modes: maximum operating displacement; minimum operating displacement; and an intermediate operating displacement. | 09-18-2014 |
20140260225 | VARIABLE CONTROL FOR A HYDRAULIC CIRCUIT - A system is provided in which a control module may include a user interface configurable to receive input and display hydraulic control settings, wherein the hydraulic control settings include at least a hydraulic pressure setting and a hydraulic flow setting. The control module may also include a processor executable to convert the hydraulic control settings to corresponding electrical currents, wherein the electrical currents correspond to at least the hydraulic pressure setting and the hydraulic flow setting. The control module may also include one or more communication interfaces coupled to the processor configurable to output the electrical currents to the hydraulic circuit to control hydraulics that operate one or more attachments of a machine. | 09-18-2014 |
20140260226 | SERVO ACTUATOR LOAD VECTOR GENERATING SYSTEM - A servo actuator system and method of operating the same includes a dual acting actuator comprising an actuator body and a movable member movable in the actuator body to define a first and second chamber on each side of the movable member. A first port is fluidly coupled to the first chamber and a second port is fluidly coupled to the second chamber. A fluid pump having a return is provided. A proportional valve assembly is fluidly coupled to the fluid pump, return and the first and second ports. The proportional valve assembly includes a plurality of metering orifices. A controller is operably coupled to the proportional valve assembly to control the plurality of metering orifices to generate a load vector having magnitude and direction and wherein an actual position of a movable member in an actuator body is indeterminate. | 09-18-2014 |
20140260227 | ADAPTIVE, LOW-IMPACT VEHICLE ENERGY HARVESTER - An adaptive, low-impact vehicle energy harvester system, and a method of harvesting vehicle energy, is provided. The system includes a plurality of channels disposed longitudinally in a trafficway, wherein each of the plurality of channels includes one or more compressible, elongated hollow bodies such that a movement of a vehicle along the trafficway causes contents in the elongated hollow bodies to be expelled from one end, a motor in communication with the hollow bodies such that the contents expelled from one end of the hollow bodies actuate the motor, and a control unit that varies a resistance to the movement of the contents in the elongated hollow bodies based on at least one of a mass of the vehicle, a velocity of the vehicle, and a rate of change of velocity of the vehicle. | 09-18-2014 |
20140260228 | SYSTEM AND METHOD FOR ADAPTIVE CONTROL OF A HYDRAULIC CONTROL SYSTEM OF A TRANSMISSION - The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump. | 09-18-2014 |
20140260229 | SYSTEM AND METHOD FOR FEED FORWARD CONTROL OF A HYDRAULIC CONTROL SYSTEM OF A TRANSMISSION - The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump. | 09-18-2014 |
20140260230 | HORIZONTAL ACTUATION COMPRESSED AIR ENERGY STORAGE SYSTEM - A modular compressed air energy storage system includes modular low pressure and high pressure subsystems coupled together with interstage pipes. Each of the subsystems includes a hydraulic vessel adapted to contain a heat transfer liquid and having a piston disposed therein for horizontal reciprocating movement. First and second pressure vessels are coupled to the hydraulic vessel on opposite sides of the piston, each adapted to contain the heat transfer liquid and/or a gas. First and second heat transfer devices are respectively disposed within upper regions of the pressure vessels. The piston is moveable in a first direction to displace at least some of the heat transfer liquid from the hydraulic vessel to the first pressure vessel and is moveable in a second direction to displace at least some of the heat transfer liquid from the hydraulic vessel to the second pressure vessel. | 09-18-2014 |
20140283507 | Method for the Speed Synchronization of a Crane Drive and Crane Drive - A method is used for synchronizing the speed of a hydraulic crane drive having at least one hydraulic consumer, which is fed with a variable volumetric rate of flow by way of at least one hydraulic variable displacement pump. The at least one hydraulic variable displacement pump is driven by way of a drive unit of the crane. By way of the crane control system, a swashplate angle of the at least one variable displacement pump is open and/or closed loop controlled as a function of the demanded volumetric flow rate for at least one consumer and/or on the basis of one additional parameter. | 09-25-2014 |
20140290233 | WATERCRAFT AND ELECTRICITY GENERATOR SYSTEM FOR HARVESTING ELECTRICAL POWER FROM WAVE MOTION - This disclosure provides improved nautical craft that can travel and navigate on their own. A hybrid vessel is described that converts wave motion to locomotive thrust by mechanical means, and also converts wave motion to electrical power for storage in a battery. The electrical power can then be tapped to provide locomotive power during periods where wave motion is inadequate and during deployment. The electrical power can also be tapped to even out the undulating thrust that is created when locomotion of the vessel is powered by wave motion alone. | 10-02-2014 |
20140290234 | WAVE POWER DEVICE - The invention relates to a wave power device | 10-02-2014 |
20140298783 | HYDRAULIC CONTROL DEVICE AND ABNORMALITY DETERMINATION METHOD FOR THE SAME - A hydraulic control device that controls a hydraulic pressure for a plurality of friction engagement elements included in an automatic transmission mounted on a vehicle to establish a plurality of shift speeds, including: a plurality of pressure regulation valves, a plurality of hydraulic switches, speed change control means, and abnormality determination means. | 10-09-2014 |
20140298784 | VIBRATION SUPPRESSION METHOD, CONTROLLER, DEVICE OF BOOM AND PUMP TRUCK - The present invention discloses a revolution vibration suppressing method for pump truck boom, comprising: detecting the vibration severity of the boom in the revolution direction; extracting dynamic characteristic parameters of the boom; calculating a control signal that can be used to control the revolving actuator to compensate the vibration severity according to the vibration severity and the dynamic characteristic parameters extracted; and driving the revolving actuator according to the control signal to move, to suppress the revolution vibration of the boom. In addition, the present invention further provides a revolution vibration suppression controller and a revolution vibration suppression device for a pump truck boom, and a pump truck comprising the device. With the technical scheme described above, the vibration of a pump truck boom in the revolution direction can be suppressed, and therefore the risk of failures of the boom is decreased and the operating safety in the work is improved. | 10-09-2014 |
20140298785 | INDUCTIVE DISPLACEMENT SENSOR - Inductive displacement sensor includes a coil and a target which is movable relative to the coil in a direction of movement, wherein an inductance of the coil is dependent on a position of the target relative to the coil, wherein the coil and the target at least partially overlap in the direction of movement. | 10-09-2014 |
20140305112 | Control Valve with Variable Pressure Relief - A hydraulic system and method of controlling hydraulic pressure are disclosed. The hydraulic system includes a pump fluidly coupled to a reservoir that contains hydraulic fluid, a control valve fluidly coupled to the pump, the control valve being selectively movable between at least two positions, a relief valve fluidly coupled to the pump via a relief conduit, the relief valve operable to flow hydraulic fluid from an outlet of the pump to the reservoir, and a variable pressure setpoint module fluidly coupled to the relief valve and the control valve. The variable pressure setpoint module being operable to open the relief valve in response to at least two pressure setpoints depending on a position of the control valve. | 10-16-2014 |
20140305113 | Power Split Transmission for a Travel Drive and Method for Controlling the Transmission - A power split transmission includes a hydraulic power branch having two hydraulic machines arranged in a hydraulic circuit, at least one of which comprises an adjustable displacement. The transmission comprises a control device for controlling the transmission ratio, and is configured to actuate at least the one adjusting device at a displacement setting. The displacement setting is adjusted in relation to a displacement setting oriented to a current demand, at least in a drive mode or drive mode section in which the displacement of one of the hydraulic machines reaches a maximum or is reduced from this maximum. | 10-16-2014 |
20140311138 | SYSTEMS AND METHODS FOR DETECTING A TYPE OF HYDRAULIC DEVICE - A system for detecting a type of hydraulic device. The system includes a hydraulic device. The system also includes a power supply having an engine and a controller. The controller is configured to detect a voltage of a signal from the hydraulic device, to categorize the signal as a type of signal of multiple types of signals based on the voltage, and to control a hydraulic output based on the voltage and the type of the signal. | 10-23-2014 |
20140318113 | CUSHIONED SWING CIRCUIT - A cushioned swing circuit provides the reduction of oscillation common in the operation of heavy equipment such as with boom members. The circuit utilizes a transfer of high pressure fluid flow (caused by the inertial of the swing during rapid deceleration) from one leg of the circuit to the other leg of the circuit or to the sump which serves as decompression for the oil that would ordinarily be trapped in the leg. These phenomena create the swing cushioning effect. | 10-30-2014 |
20140325971 | Hydromechanical Power Management of Fixed Displacement Boost Pumps - A hydraulic apparatus and a method of controlling the hydraulic apparatus are disclosed. The hydraulic apparatus includes a first pump having a first fixed displacement, a second pump having a second fixed displacement, and a diverter. The diverter includes a first diverter inlet port fluidly coupled to a discharge of the second pump, a first diverter outlet port fluidly coupled to a discharge of the first pump, and a second diverter outlet port fluidly coupled to a low pressure system, the low pressure system having a fluid pressure lower than a fluid pressure of the discharge of the first pump. The diverter is operable to selectively vary fluid communication between the first diverter inlet port and either the first diverter outlet port or the second diverter outlet port based on a reference pressure. | 11-06-2014 |
20140325972 | Hydraulic Hybrid Boom System Hydraulic Transformer - A hydraulic system includes a hydraulic actuator, an accumulator, an accumulator charge valve, and a hydraulic transformer fluidly connected between the accumulator charge valve and the accumulator. The hydraulic transformer includes a transformer motor mechanically coupled to a transformer pump. The accumulator charge valve is fluidly connected between the transformer motor and the hydraulic actuator. The transformer pump is sized to permit a maximum flow therethrough of no more than three-quarters of a flow permitted through the transformer motor. | 11-06-2014 |
20140325973 | PRIMARY PISTON ASSEMBLY FOR A MASTER BRAKE CYLINDER OF A BRAKING SYSTEM OF A VEHICLE, MANUFACTURING METHOD FOR A BRAKING UNIT, AND METHOD FOR OPERATING A BRAKING UNIT - A primary piston assembly for a master brake cylinder of a braking system of a vehicle, including a first primary piston component having a first piston element to which a driver braking force is transmittable in such a way that a pressure chamber volume of a pressure chamber of a master brake cylinder of the braking system which is fillable with liquid is reducible by moving the first piston element with the aid of the driver braking force, and a second primary piston component having a second piston element to which the first braking assisting force is transmittable in such a way that the pressure chamber volume of the pressure chamber is reducible by moving the second piston element with the aid of the first braking assisting force. | 11-06-2014 |
20140331659 | INDUSTRIAL VEHICLE AND METHOD FOR CONTROLLING INDUSTRIAL VEHICLE - An industrial vehicle includes a hydraulic mechanism, an operation lever, and a pump, a hydraulic control valve unit, a lever operation detector, an internal combustion engine controller, and a valve controller that controls the hydraulic control valve unit. When the lever operation detector detects the operation of the operation lever under a situation in which a speed of the internal combustion engine is less than or equal to a predetermined speed, the valve controller operates the hydraulic control valve unit to discharge the hydraulic oil without supplying the hydraulic oil to the hydraulic mechanism and instructs the internal combustion engine controller to increase the speed of the internal combustion engine, and subsequently operates the hydraulic control valve unit to supply the hydraulic mechanism with the hydraulic oil. | 11-13-2014 |
20140331660 | Hydraulic Machinery - The invention addresses the problem of avoiding insufficient flow being supplied to the hydraulic actuator and speed becoming insufficient during light loads in hydraulic machinery such as hydraulic shovels when the engine rotation speed is set low during normal work. The solution is to increase the discharge flow of the hydraulic pump ( | 11-13-2014 |
20140338315 | COMPRESSED GAS ENERGY STORAGE AND RELEASE SYSTEM - A compressed gas energy storage and release (CGESR) system and method. The system has a gas compressor, a container for storing compressed gas, a pressure engine, and an underground high temperature region. Conduits connect the gas compressor, the container and the pressure engine. The compressed gas drives the pressure engine. An electrical power generating means is operatively connected to said pressure engine to generate electricity. The system further comprises a means to heat at least a portion of one of the conduits utilizing heat from the underground high temperature region to heat the compressed gas therein prior to driving the pressure engine. | 11-20-2014 |
20140338316 | REGENERATION CIRCUIT FOR HYDRAULIC MOTOR, CONSTRUCTION MACHINE INCLUDING REGENERATION CIRCUIT, AND METHOD OF CONTROLLING REGENERATION CIRCUIT - A regeneration circuit includes an oil collection passage that collects return oil from a hydraulic motor to which pressure oil discharged from a hydraulic pump is supplied, a regeneration system that recovers energy from the collected return oil, and an oil resupply passage that resupplies pressure oil from the regeneration system to the hydraulic motor. The regeneration system includes a pressure oil inflow part that converts pressure energy of the collected return oil into mechanical energy, a pressure oil outflow part that outputs low pressure oil with a pressure lower than a pressure of the collected return oil to the oil resupply passage when the pressure energy of the collected return oil is converted into the mechanical energy, and a regeneration part that accumulates the mechanical energy. | 11-20-2014 |
20140345261 | METHOD FOR OPERATING A CLUTCH TRANSMISSION, CLUTCH TRANSMISSION - According to a method for operating a clutch transmission, especially a dual clutch transmission, which includes a hydraulic circuit having at least one pump for delivering hydraulic medium and at least one pressure accumulator for accommodating and making available a hydraulic medium under pressure, the pump associated with an electric motor is operated depending on a charge requirement of the pressure accumulator. To determine the charge requirement, the pump is driven by the electric motor, and the current consumed by the electric motor in the process is detected to determine the charge requirement. | 11-27-2014 |
20140345262 | METHOD AND A WAVE-POWER AGGREGATE TO EXTRACT ENERGY FROM WAVE MOTION IN A FLUID AND THE USE OF A WAVE-POWER AGGREGATE - The present invention relates to a wave-power aggregate and a method of extracting energy from wave motion in a liquid by means of a wave-power aggregate. The wave-power aggregate comprises a container which is situated at least partially in the liquid and also comprises an inflow and an outflow. The container is arranged to, under the influence of said wave motion, to let a first part of the container arrange itself in a first position and a second part of the container in a second position, where the first and second position corresponds to different potential energy states. The method comprises the steps of:
| 11-27-2014 |
20140345263 | HYDRAULIC HYBRID DRIVE SYSTEM AND METHOD FOR OPERATING A HYDRAULIC HYBRID DRIVE SYSTEM - The invention relates to a hydraulic hybrid drive system ( | 11-27-2014 |
20140352289 | POSITION ADJUSTMENT AND POSITION LOCKING OF A FLUID OPERATED ACTUATOR - A fluid operated actuator ( | 12-04-2014 |
20140360173 | HYDROSTATIC DRIVE SYSTEM - A hydrostatic drive system for a machine is provided. The hydrostatic drive system includes a first hydraulic circuit, and a second hydraulic circuit. The first hydraulic circuit includes a first pump and a first hydraulic motor configured to selectively receive a flow of pressurized hydraulic fluid from the first pump at a first pressure. The second hydraulic circuit includes a second pump and a second hydraulic motor configured to selectively receive the flow of the pressurized hydraulic fluid from the second pump at a second pressure. The hydrostatic drive system further includes a controller configured to maintain a pressure balance between the first and the second hydraulic circuits based on a difference between the first pressure and the second pressure. | 12-11-2014 |
20140373518 | SYSTEM AND METHOD FOR SPINNING UP A ROTARY ELEMENT OF A MECHANICAL DEVICE, PARTICULARLY A TURBOMACHINE - A system comprising a discharge valve that allows some of the fluid generated by a fluid generating source and intended for a drive torque generating member for a rotary element of a mechanical device to be removed so as to limit the corresponding rotational speed, this being done for a length of time that allows a thermal gradient to be reduced sufficiently that a phenomenon of deformation of said rotary element can be prevented. | 12-25-2014 |
20140373519 | ELECTRO-HYDRAULIC SYSTEM WITH FLOAT FUNCTION - A method of controlling a float function of a cylinder | 12-25-2014 |
20140373520 | SYSTEM AND METHOD FOR MAINTAINING CONSTANT LOADS IN HYDRAULIC SYSTEMS - A hydraulic system includes a pump ( | 12-25-2014 |
20150020511 | METHOD FOR ENERGY RECOVERY OF HYDRAULIC MOTOR - A method to recover energy in a reversible hydraulic motor system during a motor reverse event is disclosed. A swashplate of a hydraulic motor is pivoted over a center position when the hydraulic motor rotates in a first direction and is due to receiving a pressurized fluid from a pump. Thereafter, by de-stroking the pump a pressurized fluid to the hydraulic motor is restricted. Then, a valve is moved to a charge position to store the pressurized fluid into an accumulator. Next, the stored pressurized fluid of the accumulator is discharged to the hydraulic motor as the hydraulic motor begins rotation in an opposite, second direction. Subsequently, the valve is moved to a block position to inhibit flow of the pressurized fluid into or out of the accumulator. By up-stroking the pump, a continuous rotation of the hydraulic motor in the opposite, second direction is maintained. | 01-22-2015 |
20150027109 | HYDRAULIC SYSTEM INCLUDING A KINETIC ENERGY STORAGE DEVICE - A hydraulic system including hydraulic fluid, a hydraulic machine for pressuring the hydraulic fluid, a hydraulic circuit for delivering the hydraulic fluid to a hydraulic actuator, the hydraulic machine being configured to receive the hydraulic fluid from the hydraulic actuator and a kinetic energy storage device for storing energy in a kinetic form, the kinetic energy storage device being operably coupled to the hydraulic machine, the system being configured such that the hydraulic machine is operable to transfer energy from the hydraulic fluid received from the hydraulic actuator to the kinetic energy storage device. | 01-29-2015 |
20150033718 | FORKLIFT AND INCHING CONTROL METHOD OF FORKLIFT - In order to provide a forklift capable of performing an inching control suitable for a specific work and a running operation of the forklift and an inching control method of the forklift, an inching ratio calculating unit calculates an inching ratio, a target engine speed calculating unit calculates a target engine speed, a modulation control unit sets a time constant of the inching ratio in response to a speed difference between the target engine speed and outputs a correction inching ratio having the time constant set thereto, a multiplication unit outputs a correction absorption torque obtained by multiplying the correction inching ratio by a target absorption torque, and a HST pump electromagnetic proportional control output current converting unit outputs a current instruction value to a pump capacity setting unit. | 02-05-2015 |
20150033719 | Reducing Dig Force in Hydraulic Implements - In order to avoid cavitation in a boom cylinder head end at the beginning of a dig cycle, fluid from an alternate source is supplied to the head end before or in addition to fluid supplied by the main boom-up hydraulic circuit. In one embodiment, an electronic hydraulic valve, related sensors, and control system determines the beginning of a dig operation and uses fluid at an intermediate pressure to rapidly provide fluid to a boom head end cylinder to prevent voiding or cavitation before fluid under high pressure from the main pump can be brought to the cylinder. An on/off fluid switch is activated early in a dig operation to address low pressure at the boom cylinder head end and provide an alternate path for fluid into the cylinder in reaction to the boom being lifted by a motion of the stick and bucket in contact with the work surface. | 02-05-2015 |
20150033720 | Hydraulic Motor Drive System and Method - A hydraulic motor drive system is disclosed. The hydraulic motor drive system includes a pump, a flow control module fluidly coupled to a discharge of the pump via a first conduit, and a hydraulic motor fluidly coupled to the flow control module via a second conduit and a third conduit, and a controller operatively coupled to the flow control module. The controller is configured to operate the flow control module in a first mode, such that the flow control module blocks fluid communication between the pump and the hydraulic motor via the second conduit, and effects fluid communication between the pump and the hydraulic motor via the third conduit, and operate the flow control module in a second mode, such that the flow control module effects fluid communication between the pump and the hydraulic motor via the second conduit. | 02-05-2015 |
20150033721 | Liquid Nitrogen Conventional Generator - The Liquid Nitrogen Conventional Generator operates by using electrical energy from an existing power plant to collect, cool, store and utilize Nitrogen from the atmosphere to generate power, in any form required, to provide continuous, augmented, supplemental or alternate output of power in any predetermined form, including but not limited to electrical, mechanical and/or hydraulic, which may be produced individually or in any combination. | 02-05-2015 |
20150033722 | TURBINE SYSTEM FOR GENERATING POWER FROM A FLOW OF LIQUID, AND RELATED SYSTEMS AND METHODS - A turbine system that can be releasably anchored in a flow of liquid, like a waterfall, and generate power from the flow includes a runner operable to receive some or all of the flow of liquid and rotate to generate power, a penstock operable to direct some or all of the flow toward the runner, and an intake operable to direct some or all of the flow into the penstock. The runner may be coupled to a generator to generate electric power. The penstock has a length that is adjustable to accommodate changes in the height of the liquid drop or waterfall, which may be desirable if the distance between the top and bottom of the drop fluctuates like an ocean's tide. The turbine system also includes a valve operable to modify the flow of the liquid flowing into the runner, and a control circuit operable to determine an amount of liquid entering the penstock and, in response to the determined amount, move the valve to increase or decrease the flow of liquid into the runner. In addition, the turbine system includes an anchor to releasably hold the system in the flow of | 02-05-2015 |
20150040548 | HYDRAULIC SYSTEM HAVING LOW SPEED OPERATION - A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve. | 02-12-2015 |
20150040549 | Method and Control Device to Operate a Component of a Vehicle - Method for the operation of an assembly of a vehicle, whereas the assembly is transferable from an unactuated position into an actuated position by a pressure medium-actuated actuator, if two redundant pressure medium valves both occupy a pressure supply position, whereas, for the functional test of one of the redundant pressure medium valves, a first pressure medium valve is controlled in such a manner that the same occupies the pressure supply position, whereas a second pressure medium valve is controlled in such a manner that the same does not occupy the pressure supply position, and whereas if, upon this control of the two pressure medium valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, no reaction is detected, there is a closing at a proper second pressure medium valve, whereas if, despite this control of the two pressure medium valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, a reaction is detected, there is a closing at a defective second pressure medium valve. | 02-12-2015 |
20150047331 | HYDRAULIC SYSTEM FOR MACHINE - A hydraulic system for a machine is disclosed. The system includes an actuator configured to move a portion of the machine, a pump configured to supply pressurized fluid to the actuator, an accumulator fluidly coupled to the actuator, a valve arrangement configured to selectively direct the fluid discharged from the actuator to the accumulator for storage and to selectively direct the stored fluid from the accumulator to the actuator, and a controller. The controller is configured to determine an accumulator pressure, an actuator pressure, and an operational parameter associated with an implement system. Further, the controller is configured to determine an accumulator control mode. The controller determines an accumulator pressure leakage rate when the accumulator control mode is neutral. | 02-19-2015 |
20150047332 | HYDROSTATIC ENERGY RECOVERY SYSTEM AND METHOD - A system and method for converting pressure differentials to electricity is disclosed. Initially, a first chamber is empty and a second chamber holds compressed air/fluid. When the device is disposed in the large bodies of water, due to pressure difference inside the first chamber and the ambient pressure, water fills the first chamber. As the water passes through the first chamber, it turns the turbine or creates pressure difference in transducer to produce electricity. The device descends itself in the deeper water column due to added water in first chamber. When the device obtains equilibrium, the compressed air/fluid from second chamber is allowed to flow to the first chamber to evacuate the filled water. The evacuating water again turns the turbine or creates pressure difference in transducer to produce electricity. After evacuation of water, the device will ascend itself to a shallower depth and the process repeats. | 02-19-2015 |
20150052884 | HYDRAULIC ACTUATOR ARRANGEMENT - The present invention provides a hydraulic actuator arrangement | 02-26-2015 |
20150059325 | Hybrid Apparatus and Method for Hydraulic Systems - A hydraulic system is disclosed. The hydraulic system includes a first actuator fluidly coupled to a first rotating group in a first closed-loop circuit, a flow control module fluidly coupled to the first closed-loop circuit via a first conduit, a second actuator fluidly coupled to the flow control module via a second conduit, a second rotating group in selective fluid communication with the first conduit and the second conduit via the flow control module, and a controller operatively coupled to the flow control module. The controller is configured to operate the flow control module in a first mode and a second mode. The first mode effects fluid communication between the second rotating group and the first closed-loop circuit via the first conduit, and blocks fluid communication between the second rotating group and the second actuator via the second conduit. | 03-05-2015 |
20150075146 | METHOD FOR OPERATING A VEHICLE DRIVELINE - A method of operating a driveline including a powersplit transmission is provided. The driveline may be operated in a hydrostatic power transmission mode and a blended hydrostatic/mechanical power transmission mode. The method comprises the steps of providing a hydrostatic circuit, detecting a rapid deceleration of the vehicle, and adjusting a threshold of at least one pressure relief valve forming a portion of the hydrostatic circuit in response to the sudden deceleration. The at least one pressure relief valve facilitates quickly changing the driveline from the blended hydrostatic/mechanical power transmission mode to the hydrostatic power transmission mode. | 03-19-2015 |
20150075147 | HYDRAULIC CONTROL SYSTEM FOR MACHINE - A hydraulic control system for a machine is disclosed. The hydraulic control system includes a pump configured to pressurize a fluid, and a swing motor selectively driven by pressurized fluid from the pump. The swing motor is configured to move a part of the machine. The hydraulic control system also includes a controller in communication with the pump. The controller is configured to receive an input indicative of a difference between a desired speed and an actual speed of the swing motor, and determine if the swing motor is accelerating, decelerating, or operating at neutral mode. The controller is configured to determine an amount of return fluid from an actuator of the machine that is available as makeup fluid for the swing motor if the swing motor is operating at neutral mode. The controller is configured to control the pump based on at least the amount of return fluid. | 03-19-2015 |
20150082779 | WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE - A control unit of the work vehicle is configured to set an upper limit of a throttle opening degree based on third throttle upper limit information when a work vehicle is performing excavation work and when work implement is not in use, to set the upper limit based on the second throttle upper limit information when the work vehicle is performing excavation work and when the work implement is in use, and to set the upper limit based on the first throttle upper limit information when an angle of a boom is equal to or greater than a predetermined angle, even when the the work vehicle is performing excavation work. The second throttle upper limit information specifies a lower upper limit than the first throttle upper limit information, and the third throttle upper limit information specifies a lower upper limit than the second throttle upper limit information. | 03-26-2015 |
20150082780 | Drive system for hydraulically driven working mechanisms of a working machine - A drive system for hydraulically driven working mechanisms of a working machine includes an axial piston pump, the pump capacity and flow direction of which is varied by changing the pivot angle of the axial piston pump. The drive system includes a hydraulic motor connected via a line to the axial piston pump and drivably connected to the working mechanisms, a control unit operated to set the pump capacity of the axial piston pump to zero and a control valve arrangement that is actuated by the control unit to actuate a limiting device such that the pivot angle of the axial piston pump can be mechanically set to zero degrees (0°). | 03-26-2015 |
20150082781 | PNEUMATIC SYSTEM FOR ENGINES - A method to rotate crankshaft of an engine via a pneumatic system is disclosed herein. The engine includes a plurality of engine cylinders. The pneumatic system has an air compressor and a plurality of valves. The method includes monitoring angular orientation of the crankshaft and determining the position of the piston of the plurality of engine cylinders. An engine cylinder amongst the plurality of engine cylinders is selected with the piston in one of a power stroke or a compression stroke. A valve corresponding to the engine cylinder is activated. Upon activation of the valve, compressed air is supplied to the engine cylinder by the air compressor. The valve is then deactivated as the piston attains completion of one power stroke or one compression stroke. The activation, supply, and deactivation are sequentially repeated for each of the plurality of engine cylinders, based on predetermined firing order of the engine. | 03-26-2015 |
20150082782 | INDEPENDENT FLOW RATE CONTROLLING HYDRAULIC SYSTEM FOR PRESSURE CONTROL OF EXCAVATOR AND INDEPENDENT HYDRAULIC PRESSURE CONTROLLING METHOD USING THE SAME - An independent flow rate controlling hydraulic system for pressure control of an excavator, in which a hydraulic system of the excavator can be variably controlled via independent flow rate control. The hydraulic system includes a plurality of actuators which actuate a working apparatus, a pressure control-type hydraulic pump which feeds working fluid to the actuator, first and second electronic proportional control valves which are disposed at a piston-side inlet flow path and a load-side inlet flow path connected from the hydraulic pump to the actuators, third and fourth electronic proportional control valves which are disposed at a piston-side outlet flow path and a load-side outlet flow path connected from the actuators to a hydraulic tank, and a control unit which variably controls areas of the flow paths by controlling the first, second, third and fourth electronic proportional control valves depending on an amount by which a control stick is manipulated. | 03-26-2015 |
20150096288 | Systems and Methods for Heat Balance and Transport for Aircraft Hydraulic Systems - A thermal management system is provided. The thermal management system includes a first hydraulic system for circulating a first hydraulic fluid at a first temperature, a second hydraulic system for circulating a second hydraulic fluid at a second temperature that is higher than the first temperature, and a heat exchanger coupling the first hydraulic system to the second hydraulic system, wherein the heat exchanger is configured to exchange heat between the first hydraulic fluid and the second hydraulic fluid. | 04-09-2015 |
20150096289 | PRESSURISED ENERGY STORAGE SYSTEM IN WHICH THE HEAT ACCUMULATOR IS ARRANGED IN AN OVERPRESSURE ZONE - The invention relates to a compressed air energy storage system comprising a pressure accumulator ( | 04-09-2015 |
20150101322 | SYSTEM ARCHITECTURE FOR MOBILE HYDRAULIC EQUIPMENT - A system architecture for use on mobile hydraulic equipment. The system architecture includes a power system that includes an electrical generator, power supply electronics in electrical communication with the electrical generator, an electrical storage medium in electrical communication with the electrical generator and in parallel with the power supply electronics, and an electrical power bus for distributing power from the power system to a first component control system. The first component control system includes first drive electronics and at least a first electro hydrostatic actuator. The system architecture also includes a main controller. The power system is in data communication and electrical communication with the main controller, and the first component control system is in data communication with the main controller. | 04-16-2015 |
20150107232 | HYDRAULIC SYSTEM FOR CONTROLLING A JAW CRUSHER - A hydraulic system for controlling the position of a movable jaw of a jaw crusher includes a hydraulic cylinder having a piston with a piston rod for positioning the movable jaw. The hydraulic cylinder has a bore side space for containing a hydraulic fluid taking up crushing forces exerted by the movable jaw on the piston rod, and an annular side space containing a hydraulic fluid pressing the piston against hydraulic fluid of the bore side space. The hydraulic system further includes an annular side space accumulator having a fluid compartment, which is in fluid contact with the annular side space, and a gas compartment containing a pressurized gas applying a pressure on the hydraulic fluid in the annular side space. | 04-23-2015 |
20150107233 | Methods and apparatus for layer jamming - In some implementations, bending or other shape changes of a device are actuated by inflating or deflating a bladder in the device. Then, once the desired new shape is achieved by this actuation, another bladder in the device is layer-jammed, to make the device rigid in the new shape. In some cases, sheets in the layer-jamming bladder are coated with abrasive particles. In some cases, layer jamming bladders are interwoven to form a woven device. The rigidity of the woven device can be anisotropically controlled. Layer jamming some, but not all, of the bladders in the woven device causes the woven device to have a rigidity that varies by direction. In some cases, a layer-jamming bladder includes a solid layer with a crease in it. As a result, the bladder can easily bend at the crease. | 04-23-2015 |
20150113969 | HYDRAULIC HYBRID - A hybrid system, consisting of an internal combustion engine ( | 04-30-2015 |
20150121859 | APPARATUS AND METHOD FOR SUPPLYING FUEL TO ENGINE OF SHIP - Disclosed herein are an apparatus and a method for supplying a fuel to an engine of a ship. The apparatus for supplying a fuel to an engine of a ship includes: a high pressure pump pressurizing a liquefied natural gas (LNG) and supplying the pressurized LNG to the engine; a hydraulic motor driving the high pressure pump; and a lubricating pump supplying lubricating oil to the high pressure pump. | 05-07-2015 |
20150128579 | METHOD AND SYSTEM FOR STORING ENERGY - A method is provided for storing energy including the steps of: during a time period when electrical energy is available at low prices, pumping water from a lower reservoir to a reservoir at a higher elevation wherein the difference between the elevation of the higher reservoir and the lower reservoir is at least 100 meters; during a time period when electrical energy is available at a higher price, utilizing a Pelton turbine to generate mechanical energy using the difference between the potential energy of the water at the higher reservoir and the lower reservoir and thereby transferring water from the higher reservoir to the lower reservoir; converting the mechanical energy to electrical energy; and when the mechanical power is not being generated, maintaining the Pelton turbine in a spinning stand-by mode. | 05-14-2015 |
20150128580 | HYDRAULIC BRAKE - A hydraulic brake mechanism for use in hydraulic systems to provide braking of a hydraulic motor is disclosed. The brake mechanism provides proper braking under a range of operating conditions, including (1) the start of flow from the pump to the brake and motor and braking is not desired; (2) operating conditions in which constant flow is provided from the pump to the brake and motor and braking is not desired; (3) operating conditions in which abrupt decreases of flow from the pump to the brake and the motor occur, for example where flow is reduced due to being drawn by another work element or hydraulic load, but under which a reduced supply flow is still present and braking is not desired; and (4) operating conditions in which the hydraulic flow from the pump to the brake mechanism and the motor is shut off completely and braking is desired. | 05-14-2015 |
20150128581 | HYDROSTATIC TORQUE CONVERTER AND TORQUE AMPLIFIER - An example includes a hydraulically controllable coupling to couple a rotating input and to an output to rotate, or to decouple the input and the output, with coupling and decoupling modes selected by switching a hydraulic device such as a vane pump between a pumping mode and a mode in which it does not pump. In an example, the system cooperates with a transmission to increase the number of possible gear ratios in some examples. | 05-14-2015 |
20150135693 | ENGINE CONTROL APPARATUS FOR WORK MACHINE AND ENGINE CONTROL METHOD THEREOF - The present invention includes an information generator to set a lever manipulation amount total sum decrease flag during a period when a lever manipulation amount total sum is decreasing, a first processor to process an engine actual output, an engine actual output latching function block to output the maximum value of the engine actual output until the present during a period in which a lever manipulation amount total sum decrease flag is not set, and output the present engine actual output during a period in which the flag is set, a second processor to output an engine target output based on the engine output, and a controller to control the engine speed under limitation of the engine target output. | 05-21-2015 |
20150135694 | Gearbox Hydraulic Circuit - A gearbox hydraulic circuit includes a hydraulic pump connected to a fluid reservoir to generate a flow of pressurised fluid. A pressure circuit connected to the hydraulic pump conveys the flow of pressurised fluid. A pressure control valve disposed in the pressure circuit between the first line and the second line of the pressure circuit maintains the pressure of the pressurised fluid in the first line. A shunt connected to the pressure circuit is operable to route the flow of pressurised fluid from the first line to the second line to reduce the pressure in the first line. | 05-21-2015 |
20150135695 | SYSTEM AND METHOD FOR CONTROLLING HYDRAULIC COMPONENTS OF A WORK VEHICLE BASED ON STORED ELECTRO-HYDRAULIC SETTINGS - A method for controlling the operation of at least one hydraulic component of a work vehicle may generally include storing, with a computing device, a first electro-hydraulic setting and a second electro-hydraulic setting for the hydraulic component. The first electro-hydraulic setting may be associated with at least one of a pre-defined speed setting or a pre-defined sensitivity setting. The second electro-hydraulic setting may be associated with at least one of an operator-defined speed setting or an operator-defined sensitivity setting. In addition, the method includes receiving an input associated with an operator's selection of the first electro-hydraulic setting or the second hydraulic setting, and controlling the operation of the hydraulic component in accordance with the first electro-hydraulic setting or the second electro-hydraulic setting based on the operator's selection. | 05-21-2015 |
20150135696 | Turbomachinery Having Self-Articulating Blades, Shutter Valve, Partial-Admission Shutters, and/or Variable-Pitch Inlet Nozzles - An axial-flow turbine assembly that includes one or more features for enhancing the efficiency of the turbine's operation. In one embodiment, the turbine assembly includes a turbine rotor having blades that adjust their pitch angle in direct response to working fluid pressure on the blades themselves or other part(s) of the rotor. In other embodiments, the turbine assembly is deployable in an application, such as an oscillating water column system, in which the flow of working fluid varies over time, for example, as pressure driving the flow changes. In a first of these embodiments, the turbine assembly includes a valve that allows the pressure to build so that the flow is optimized for the turbine's operating parameters. In a second of these embodiments, one or more variable-admission nozzle and shutter assemblies are provided to control the flow through the turbine to optimize the flow relative to the turbine's operating parameters. | 05-21-2015 |
20150143803 | EXPANDABLE HIGH PRESSURE TANK FOR AIR COMPRESSOR AND METHODS OF USE - The present invention is directed, in part, to an apparatus and methods related to an expandable storage tank for compressed gas, the storage tank prepared from a puncture resistant, flexible fabric material in which the storage tank is expandable to a desired volume when inflated and when deflated. During periods of non-use the storage tank is retracted in a compact and folded manner to save space compared to when the tank is inflated. The storage tank is utilized by employing its use in conjunction with a traditional air compressor and can be configured with or without a rigid outer shell that expands in relation to the amount of compressed air transferred into the expandable storage tank. | 05-28-2015 |
20150299986 | STROKE OPERATION CALIBRATION CONTROL DEVICE FOR HYDRAULIC CYLINDER AND STROKE OPERATION CALIBRATION CONTROL METHOD FOR HYDRAULIC CYLINDER - A stroke operation calibration control device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; a malfunction detection unit outputting an error when the stroke length is in the predetermined measurement range; and a control unit prohibiting the reset until the stroke length has passed the reset reference point at power input time. | 10-22-2015 |
20150300384 | HYDRAULIC SYSTEM HAVING ENERGY RECOVERY - A hydraulic system for a machine is disclosed. The system may have a pump and a motor driven by pressurized fluid from the pump. An accumulator is configured to receive fluid discharged from the motor and to discharge fluid to the motor. The system may include a first valve to selectively communicate the higher pressure of conduits coupled between the pump and motor to the accumulator. A second valve and a third valve can be used to facilitate charging and discharging of the accumulator. The system may include a controller configured to implement a plurality of modes of operation, which each mode of operation may include a different combination of motor deceleration and motor acceleration segments during which the accumulator receives and discharges fluid, respectively. An input may be used to determine the segment of the work cycle. | 10-22-2015 |
20150308463 | SMOOTH CONTROL OF HYDRAULIC ACTUATOR - A method and system is provided for controlling a hydraulic actuator in a work machine by opening a load holding valve in a measured fashion in order to leak hydraulic pressure back into a depressurized portion of the hydraulic circuit, thereby minimizing or eliminating jerkiness in the actuator when the actuator is under an external load. | 10-29-2015 |
20150308467 | Turn Drive for a Wind Turbine, and Method for Rotating the Rotor Shaft of a Wind Turbine - The invention relates to a turn drive for a wind turbine. The turn drive comprises a shaft, a hydraulic motor for driving the shaft, and a drive line for supplying a pressurized hydraulic fluid to the hydraulic motor. According to the invention, the drive line is provided with a settable pressure-limiting valve. The invention additionally relates to an associated method for rotating the rotor shaft of the wind turbine. By means of the method according to the invention and the turn drive, the rotor blades can be mounted individually on the hub of the rotor, without the gearbox of the wind turbine becoming overloaded. | 10-29-2015 |
20150308469 | MACHINE CONTROL SYSTEM HAVING HYDRAULIC WARMUP PROCEDURE - A control system for a machine is disclosed. The control system may have a bypass passage situated to allow fluid to bypass an actuator, and a warmup valve disposed within the bypass passage that is movable between flow-passing and-blocking positions. A controller is configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, compare the pressure of the fluid of the actuator with a threshold, and move the warmup valve to the flow-blocking position and reduce a pump outlet pressure when the pressure of the fluid is greater than the threshold. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal. | 10-29-2015 |
20150316077 | METHOD FOR OPERATING A HYDRAULIC DEVICE WITH PUMP AND SERVOMOTOR, AND ASSOCIATED HYDRAULIC DEVICE - In a method for operating a hydraulic device for providing a supply to hydraulic consumers (V) on a plastics injection moulding machine, provision is made of a pump ( | 11-05-2015 |
20150320137 | FOOTWEAR ENERGY HARVESTING APPARATUS AND METHOD - An energy harvesting system for footwear is described having a sole, heel and an upper and comprising a first gaseous bellows pump formed at the sole of the footwear with the bellows hinged forward of the sole; a second gaseous bellows pump formed at the heel of the footwear with the bellows hinged forward of the heel. A gas reservoir is mounted to the upper of the footwear in fluid communication with first and second gaseous pumps downstream of the pumps and adapted to receive the gaseous medium exiting under pressure from the pumps. An axial turbine has an output shaft mounted on the footwear upper downstream of the reservoir and adapted to receive pressurized gas from the reservoir when a predetermined pressure threshold is attained in the reservoir so as to activate the axial turbine; and an electrical generator mounted on the upper, downstream of the axial turbine and engaged with the turbine output shaft which can be engaged only when a predetermined shaft velocity threshold has been attained. | 11-12-2015 |
20150322972 | Gas handling method for dual bottle subsea accumulators - The method of safely handling compressed gas in a dual bottle subsea accumulator during service operations comprising providing a gas bottle for the primary purpose of storing gas which will be compressed to provide accumulated energy, providing a hydraulic bottle with the primary purpose of converting the energy stored in the gas bottle into pressurized hydraulic supply fluid, providing interconnecting plates at the top and bottom of the gas bottle and the hydraulic bottle with porting to communicate the gas from the gas bottle to the hydraulic bottle, providing a first closure valve in a protected position within the top of the gas bottle, providing a second closure valve in a protected position within the bottom of the gas bottle, expelling a majority of the gas from the hydraulic bottle into the gas bottle, closing the first closure valve and the second closure valve, and removing the interconnecting plates from the gas bottle and the hydraulic bottle, and servicing the hydraulic bottle. | 11-12-2015 |
20150330419 | COMPRESSED AIR ENERGY STORAGE SYSTEM - The present disclosure is related to a method of pseudo-isothermal energy conversion between mechanical and pneumatic energy comprising the steps of: providing a gas/liquid unit wherein the gas/liquid unit may be a compression unit filled with gas and a liquid storage unit containing liquid, the compression unit having thermally conductive walls; compressing the gas by pumping the liquid into the compression unit via a liquid pump and producing compressed gas; concurrently transferring the heat created during the compression step through the walls of the compression unit; and transferring the compressed gas into a compressed gas storage unit and thereby storing energy in the form of pneumatic energy of a compressed gas. The method may also include expansion steps wherein the stored pneumatic energy in the form of compressed gas is converted into mechanical energy | 11-19-2015 |
20150337871 | HYDRAULIC CONTROL SYSTEM HAVING BIAS CURRENT CORRECTION - A hydraulic control system for a machine is disclosed. The hydraulic control system may include a pump configured to pressurize fluid, a displacement control valve configured to affect displacement of the pump, and a solenoid configured to bias the displacement control valve to a zero position. The hydraulic control system may also include a controller in communication with the solenoid. The controller may be configured to estimate a bias current that biases the displacement control valve to the zero position, and to control the displacement control valve based on the bias current. The controller also be further configured to monitor a pump parameter of the pump, and to determine a control error associated with the pump parameter. The controller may further be configured to selectively adjust the bias current based on the control error. | 11-26-2015 |
20150337873 | Soft Buckling Actuators - A soft actuator is described, including: a rotation center having a center of mass; a plurality of bucklable, elastic structural components each comprising a wall defining an axis along its longest dimension, the wall connected to the rotation center in a way that the axis is offset from the center of mass in a predetermined direction; and a plurality of cells each disposed between two adjacent bucklable, elastic structural components and configured for connection with a fluid inflation or deflation source; wherein upon the deflation of the cell, the bucklable, elastic structural components are configured to buckle in the predetermined direction. A soft actuating device including a plurality of the soft actuators and methods of actuation using the soft actuator or soft actuating device disclosed herein are also described. | 11-26-2015 |
20150337877 | WORK VEHICLE AND CONTROL METHOD FOR SAME - The target input shaft torque determination unit determines a target input shaft torque. The target output shaft torque determination unit determines a target output shaft torque so that a deceleration force for decelerating the vehicle is generated on the output shaft of the power transmission device in a state in which connection and disconnection states of the forward travel clutch and the reverse travel clutch are maintained at the state before the start of the shuttle action when the shuttle action is started. The torque-balance information is stored in a storage unit and defines a relationship between the target input shaft torque and the target output shaft torque to achieve a balance of the torques of a power transmission device. The command torque determination unit uses the torque-balance information to determine torque commands for the motor from the target input shaft torque and the target output shaft torque. | 11-26-2015 |
20150354547 | High Throughput Fabrication of Soft Machines - A soft robot device includes at least a first thermoplastic layer and a second thermoplastic layer, wherein at least one layer is comprised of an extensible thermoplastic material; at least one layer is an inextensible layer; and at least one layer comprises a pneumatic network, wherein the pneumatic network is configured to be in fluidic contact with a pressurizing source, wherein the first and second thermoplastic layers are thermally bonded to each other. | 12-10-2015 |
20150361754 | SHAPE MEMORY ALLOY POWERED HYDRAULIC ACCUMULATOR - A system, in certain embodiments, includes an accumulator. The accumulator includes a first cylinder configured to receive a fluid within an internal volume of the first cylinder. The accumulator also includes a piston configured to move axially within the first cylinder. Axial movement of the piston within the first cylinder adjusts the internal volume of the first cylinder. The accumulator further includes a plurality of shape memory alloy wires configured to cause the axial movement of the piston within the first cylinder. | 12-17-2015 |
20150361995 | FLOW CONTROL DEVICE AND FLOW CONTROL METHOD FOR CONSTRUCTION MACHINE - Disclosed are a flow control device and a flow control method for a construction machine for preventing the loss of fluid exhausted from a hydraulic pump when a boom and an arm of an excavator are operated in combination. The flow control device for a construction machine according to the present invention includes: an engine; a variable capacity hydraulic pump connected to the engine; a first hydraulic cylinder and a second hydraulic cylinder connected to the hydraulic pump; a first control valve disposed in a center bypass channel of the hydraulic pump, the first control valve, in neutral, returning the fluid exhausted from the hydraulic pump to a hydraulic tank and, when switched, controlling the driving, stopping, and direction change of the first hydraulic cylinder; a second control valve disposed downstream of the center bypass channel of the hydraulic pump, the second control valve, in neutral, returning the fluid exhausted from the hydraulic pump to the hydraulic tank and, when switched, controlling the driving, stopping, and direction change of the second hydraulic cylinder; a regeneration fluid channel for supplementing and reusing fluid returned to the hydraulic tank during a compression stroke of the first hydraulic cylinder, and a regeneration valve disposed in the regeneration fluid channel; and a pressure-compensated flow control valve which is disposed in a meter-in fluid channel of a spool of the first control valve and limits the quantity of working fluid supplied from the hydraulic pump to the first hydraulic cylinder when the first hydraulic cylinder and the second hydraulic cylinder are operated in combination. | 12-17-2015 |
20150369261 | HYDRAULIC DRIVE SYSTEM - A drive system includes a variable displacement pump and a variable displacement motor hydraulically driven by the pump. A controller is configured to determine a motor displacement command to shift the motor displacement, and a pump displacement command to change the pump displacement. The controller modifies the motor and pump displacement commands based on hydraulic fluid temperature, the grade on which the machine is travelling and the speed of the prime mover. The controller further coordinates transmittal of the pump and motor displacement commands to maintain the travel speed of the machine while changing the displacements of the pump and motor. | 12-24-2015 |
20160002886 | PILOT PRESSURE CONTROL SYSTEM - A pilot pressure control system for controlling a pilot signal pressure at a pilot inlet of a control valve includes a pilot outlet adapted to be connected to the pilot inlet. The pilot pressure control assembly further includes a first pilot valve assembly and a second pilot valve assembly. Each one of the first and second pilot valve assemblies are individually controllable so as to selectively provide a first fluid flow direction from a pressure line to the pilot outlet and a second fluid flow direction from the pilot outlet to a drain line. At least the first pilot valve assembly is adapted to assume a maximum pressure supply condition so as to supply a first pilot valve assembly maximum pressure to the pilot outlet. At least the second pilot valve assembly is adapted to provide a pressure drop from the pilot outlet to the drain line via the second pilot valve assembly. The pilot pressure control system is configured such that when the pilot pressure control system is connected to the pressure and drain lines and W hen the first pilot valve assembly is controlled so as to assume the maximum pressure supply condition and the second pilot valve assembly provides a fluid flow in the second fluid direction with a minimum pressure drop, the pressure at the pilot outlet is equal to or above 20 of the first pilot valve assembly maximum pressure (Pmax). | 01-07-2016 |
20160003267 | Electronic Control of Actuator Force and Torque with an Independent Metering Valve - A hydraulic system includes one or more sensors configured to measure a pressure at least one input or end of a hydraulic actuation device, such as a cylinder for example. A control module can be operatively coupled to the sensors and at least one metering valve. The control module can selectively open the metering valve when the pressure at one of the ends of the cylinder reaches a first pressure threshold to control the force on the cylinder rod, to permit flow from the end of the cylinder to the tank. | 01-07-2016 |
20160010668 | INITIALIZATION METHOD FOR ELECTRO-MECHANICAL BRAKE | 01-14-2016 |
20160010704 | Hydraulically-Driven Flywheel Uninterruptable Power Supply | 01-14-2016 |
20160010789 | SINGLE-AXIS DRIVE SYSTEM AND METHOD | 01-14-2016 |
20160025111 | SYSTEM AND METHOD FOR ENERGY STORAGE AND RETRIEVAL - Disclosed herein is an isothermal liquid piston natural gas compression and expansion system for storing and retrieving energy in large quantities that employs an existing infrastructure embodied in the natural gas pipeline and storage system, including the natural gas as a medium for the storage and retrieval of pressure energy for large scale sustainable energy storage. | 01-28-2016 |
20160025147 | TORSIONAL VIBRATION DAMPER AND ARRANGEMENT AND METHOD FOR THE DAMPING OF A DRIVETRAIN OF A MOTOR VEHICLE - The invention relates to a torsional vibration damper, in particular a dual-turbine damper, for a drivetrain of a motor vehicle, preferably for a drivetrain of a motor vehicle having a hydrodynamic torque converter, having a first damper and a second damper connected to the latter in series, where the two dampers are situated essentially on a common circumference or essentially in a common plane of the torsional vibration damper, there being a damper intermediate mass connected between the two dampers connected in series, and a centrifugal pendulum device provided on the damper intermediate mass. | 01-28-2016 |
20160025215 | METHOD AND ARRANGEMENT FOR THE DECELERATION OF A HYDROSTATIC TRANSMISSION - Method for deceleration of a hydrostatic transmission | 01-28-2016 |
20160032564 | Multiple Control Patterns for Machines with Hand and Foot Controls - A control system for a machine having traction devices, an implement, and a hydraulic system configured to drive the traction devices and the implement is disclosed. The control system may include a controller in communication with an operator interface and the hydraulic system. The controller may be configured to receive a signal from the operator interface to operate the machine according to a first predetermined control pattern, send signals to the to the hydraulic system to control the machine according to the first predetermined control pattern, receive a signal from the operator interface to operate the machine according to a second predetermined control pattern, and send signals to the hydraulic system to control the machine according to the second predetermined control pattern. | 02-04-2016 |
20160040689 | DEVICE AND METHOD FOR CONTROLLING HYDRAULIC PUMP IN CONSTRUCTION MACHINE - Disclosed are a device and a method for controlling a hydraulic pump in a construction machine, the method including: checking whether a dynamic characteristic of an engine deviates from a predetermined permissible range when a load is applied to the hydraulic pump and a pump load reaches pump torque required by the hydraulic pump; when the dynamic characteristic of the engine deviates from the predetermined permissible range, applying a pump load to the hydraulic pump so as to increase the pump torque to predetermined torque with a predetermined change rate; collecting information which is generated when the pump load is applied; generating a new torque change rate map by generating a torque change rate for each load section based on the information collected in the information collecting step; and updating an existing torque change rate map to the new torque change rate map generated in the map data generating step. | 02-11-2016 |
20160040690 | DRIVE CONTROL SYSTEM OF OPERATING MACHINE, OPERATING MACHINE INCLUDING DRIVE CONTROL SYSTEM, AND DRIVE CONTROL METHOD OF OPERATING MACHINE - A drive control system of a hydraulic excavator includes a control device. When accelerating a turning body to a target turning speed, the drive control device controls an operation of the electric motor driving device such that the electric motor outputs high efficiency torque by which a highest electric power efficiency is obtained at the target turning speed. The control device controls an operation of an oil pressure supply device such that residual torque obtained by subtracting the high efficiency torque from target torque is output from an oil-pressure motor. | 02-11-2016 |
20160046269 | HYDRAULIC TRANSMISSION DEVICE - Hydraulic transmission apparatus ( | 02-18-2016 |
20160047399 | METHOD, DEVICE, AND SYSTEM FOR CONTROLLING HYDRAULIC PUMP OF CONSTRUCTION MACHINE - The present disclosure relates to a method, a device, and a system for controlling a hydraulic pump of a construction machine, the system comprising: an engine; an engine control unit configured to control the engine by using engine limit torque information and current engine torque information of the engine; a hydraulic pump operated by power supplied from the engine; at least one actuator driven by a hydraulic pressure discharged from the hydraulic pump; and a hydraulic pump control device configured to control a limited swash plate angle of the hydraulic pump by using a torque of the hydraulic pump and the engine limit torque information received from the engine control unit. | 02-18-2016 |
20160052760 | METHOD FOR CONTROLLING A COMBINED ROTARY/PUSH MOVEMENT - The invention relates to a method and device for controlling a combined rotary/push movement of a load-receiving means of an industrial truck, in particular a three-way stacker, both the rotary movement and the push movement being brought about by means of respective hydraulic elements ( | 02-25-2016 |
20160053738 | DEPLOYMENT SYSTEM - A wave energy conversion system for harnessing wave energy in a body of water and converting the harnessed wave energy to pressurised fluid, and also a method of deploying such a wave energy conversion system. The wave energy conversion system comprises a unit including a buoyant structure responsive to wave motion, at least one pump and at least one tether adapted to be operably connected between the pump and a fixture below the unit, whereby movement of the buoyant structure relative to the fixture in response to wave motion converts harnessed energy to pressurised fluid. The unit is adapted to be deployed by moving the tether into coupling engagement with the fixture upon actuation of the pump in a manner causing movement of the tether into engagement with the fixture. | 02-25-2016 |
20160053778 | APPARATUS AND METHOD FOR CONTROLLING SPOOL DISPLACEMENT OF CONSTRUCTION MACHINE - Provided are an apparatus and a method for controlling spool displacement of a construction machine, which are capable of improving regeneration efficiency of the construction machine, and improving a fuel efficiency characteristic of the construction machine by reducing pressure loss in the operating mode by adjusting the quantity of spool displacement in a regeneration mode when a current pressure of a main pump is less than a predetermined operating pressure, and determining whether the construction machine is in an operating mode or the regeneration mode in real time according to an operating angle of a joystick and the current pressure of the main pump when the current pressure of the main pump is greater than or equal to the predetermined operating pressure to variably change the quantity of spool displacement in the operating mode. | 02-25-2016 |
20160053779 | OPERATION CONTROL SYSTEM - An operation control system for a work apparatus equipped to a work vehicle includes a controller controlling the work apparatus. A first hydraulic valve and a second hydraulic valve control hydraulic pressure supply to the work apparatus. An operation unit provides an operation input signal to the controller. A first mounting base and a second mounting base are provided adjacently to each other in the operation unit. A first single-operation tool is formed mountable on the first mounting base and a second single-operation tool is formed mountable on the second mounting base. Further, a multi-operation tool is mountable so as to straddle both the first mounting base and the second mounting base. | 02-25-2016 |
20160060846 | Method of Controlling Work of Excavator - Disclosed is a method of controlling work of an excavator. When a supply flow rate of hydraulic oil which is supplied to a working apparatus by a first pump among first and second pumps driven by the rotational force of the engine is higher than a requirement flow rate required by the working apparatus, the RPM of an engine is reduced, and hydraulic oil pumped by the first and second pumps are supplied to the working apparatus. Accordingly, an energy-saving effect such as a gas mileage of an excavator being reduced is obtained. | 03-03-2016 |
20160061193 | RAILROAD KINETIC ENERGY HARNESSING APPARATUS - An apparatus for harnessing energy from a wheel travelling on a railroad track includes an elongate body with a plurality of pockets spaced apart along a top surface thereof. Energy collection devices are installed in the pockets, and each includes an actuator extending proud of the top surface. A mounting assembly releasably mounts the body adjacent to the railroad track so that the actuators of the energy collection devices are positioned in a path of the wheel to be actuated thereby. The energy collection devices may be coupled to a low pressure fluid supply reservoir and a high pressure fluid accumulator, and used to pump fluid from the reservoir to the accumulator upon actuation. | 03-03-2016 |
20160061227 | VIBRATING RAM ARRANGEMENT, AND METHOD FOR OPERATING THE VIBRATING RAM ARRANGEMENT - The invention relates to a vibrating ram arrangement comprising a hydraulic assembly, a vibrator which is connected to the hydraulic assembly via hydraulic tubes, and a controller which is paired with the hydraulic assembly. The hydraulic assembly has a hydraulic pump which is driven by an internal combustion engine, and the vibrator has imbalances and an adjustable hydraulic engine for driving the imbalances. A hydraulic fluid is conducted through the hydraulic assembly, the hydraulic tubes, and the hydraulic engine in a circuit. A frequency sensor for determining the frequency of the vibrator is connected to the controller, and the controller is designed to control a volumetric flow rate conducted through the circuit dependent on the signal of the frequency sensor. According to the invention, the vibrator has a device, which is independent of the controller, for automatically adjusting a displacement volume of the hydraulic engine dependent on a pressure within the circuit. | 03-03-2016 |
20160061236 | METHOD FOR CONTROLLING HYDRAULIC SYSTEM OF CONSTRUCTION MACHINERY - The present disclosure relates to a method for controlling a hydraulic system of construction machinery. The method for controlling the hydraulic system of construction machinery according to the present disclosure includes an engine speed prediction step, in which a variable rated engine speed, which varies within a range larger than a fixed rated engine speed and smaller than a high idle engine speed for the fixed rated engine speed and a virtual engine speed, which is to be input later, are predicted to output a virtual engine speed value predicted before an actual engine speed is input. Accordingly, when an operation load is applied, pump torque may initially have a margin, and even though an engine speed is decreased due to the operation load, it is possible to prevent an engine speed decrease phenomenon in which the engine speed becomes remarkably smaller than the rated engine speed. | 03-03-2016 |
20160069356 | METHOD FOR STORING ENERGY - Disclosed is a method for storing energy using an electrically charged gas. The method includes the steps of compressing the electrically charged gas in a compression chamber using external force to generate compressed charged gas; storing the compressed charged gas received from the compression chamber in a containment chamber; transferring a portion of compressed charged gas into the energy recovery unit at high pressure; and expanding the compressed electrically charged gas to regenerate energy in the energy recovery unit. | 03-10-2016 |
20160069357 | VIBRATING RAM APPARATUS AND METHOD FOR OPERATING THE SAME - The invention relates to a method for operating a vibrating ram arrangement comprising a hydraulic assembly with a hydraulic pump driven by an internal combustion engine, a vibrator connected to the hydraulic assembly in a hydraulic circuit, a hydraulic clamping device connected to the vibrator for a material to be rammed, and a controller, with which a fluid flow through a hydraulic motor of the vibrator can be activated and deactivated and with which the hydraulic clamping device can be closed and opened. According to the invention, the controller requests at least one operating state value during a pause in the operation when the vibrator is deactivated and automatically stops the internal combustion engine if the operating state value corresponds to a specified value. Additionally, the controller automatically starts the internal combustion engine in order to resume the vibrating ram operation in the event of a user signal. | 03-10-2016 |
20160069359 | PRESSURE VESSEL HAVING PLURALITY OF TUBES FOR HEAT EXCHANGE - A system for compressing gas includes a source of gas, a gas output location, first and second pressure vessels, first and second gas input lines for directing gas from the source of gas respectively to the first and second pressure vessels, first and second gas output lines for directing gas respectively from the first and second pressure vessels to the gas output location, a hydraulic system for moving hydraulic fluid back and forth between the first and second pressure vessels to compress gas in the first and second pressure vessels in an alternating manner. The first and second pressure vessels each include a plurality of tubes for containing the gas as the gas is pressurized and for absorbing heat generated as the gas is compressed. | 03-10-2016 |
20160069360 | A CONTROL ARRANGEMENT OF A HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM - A control arrangement ( | 03-10-2016 |
20160076558 | METHOD OF INCREASING ELECTRO-HYDROSTATIC ACTUATOR PISTON VELOCITY - Provided is a system and method to generate and control hydraulic fluid flow that exceeds the fluid flow capacity of an electrically driven pump to achieve high actuator retraction/extension speeds and/or electrical flow capacity of an electrical storage system to better control electrical storage. Electric machines and hydraulic pumps generally have a maximum speed beyond which they cannot be operated at. Further, electrical storage systems typically have storage capacities and rates beyond which they cannot be operated at. While an alternate approach could be to increase the hydraulic pump displacement, thus lowering the required electric machine and pump speed to generate a certain flow, it is typically desirable to reduce pump displacement in order to reduce required electric machine torque and minimize component size and losses. | 03-17-2016 |
20160084271 | METHOD TO DETECT HYDRAULIC VALVE FAILURE IN HYDRAULIC SYSTEM - According to one aspect of the invention, a hydraulic system includes a controller connected to an operator interface, a pump operable in a first direction for supplying pressurized fluid, and a load-holding valve connected between the pump and a port for connection to an actuator. The load-holding valve may be controlled by the controller and operative in a first position to allow flow to the actuator to operate the actuator against a load and operative in a second position to block load-induced return flow from the actuator to the pump. The controller may be configured to receive a requested actuator stop, to control the first valve to move to the second position in response to the requested actuator stop, to monitor a first system condition in response to the requested actuator stop, to evaluate the monitored system condition with a prescribed criteria, and to determine whether or not to initiate a back-up control routine based on the evaluation. | 03-24-2016 |
20160084275 | WORK VEHICLE, AND CONTROL METHOD FOR WORK VEHICLE - A work vehicle including: a traveling hydraulic pump of a variable displacement type driven by engine; a hydraulic motor forming a closed circuit with the traveling hydraulic pump and driven by operating oil discharged from the traveling hydraulic pump; a drive wheel driven by the hydraulic motor; and a control device determining whether an operator of the work vehicle has an intention of decelerating the work vehicle, and when the operator has an intention of decelerating the work vehicle and when the work vehicle starts to increase its speed, the control device causes a capacity ratio obtained by dividing a capacity of the hydraulic motor by a capacity of the traveling hydraulic pump, to be equal to or larger than a value when the work vehicle starts to increase its speed, according to an increasing amount in the speed of the work vehicle. | 03-24-2016 |
20160084276 | HYDRAULIC DRIVE WITH RAPID STROKE AND LOAD STROKE - A hydraulic drive including a differential cylinder that has a first pressure chamber and a second pressure chamber and a differential piston, a first hydraulic pump that includes a pump intake and a pump outlet, a directional control valve having a first switching position and a second switching position, a high pressure tank, and an additional hydraulic cylinder that includes an additional pressure chamber hydraulically connected with the pump intake and with the high pressure tank and an additional piston limiting the additional pressure chamber, the differential piston being movably coupled with the additional piston, wherein in the first switching position of the directional control valve the first pressure chamber is hydraulically connected with the second pressure chamber, and in the second switching position of the directional control valve the second pressure chamber is not hydraulically connected with the first pressure chamber. | 03-24-2016 |
20160084277 | A HYDRAULIC SYSTEM FOR A WORKING MACHINE AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM - A hydraulic system includes a first and a second rotating hydraulic machine, the first and second hydraulic machine being arranged to provide a torque via a common output shaft; a first valve arrangement for providing a differential hydraulic pressure level over the first hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels, a second valve arrangement for providing a differential hydraulic pressure level over the second hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels; and a control unit configured to control the first valve arrangement and the second valve arrangement such that different discrete levels of torque are provided via the output shaft of the hydraulic system. A hydraulic system for providing different discrete levels of torque using one hydraulic machine and a plurality of differential pressure levels, and a method for controlling m hydraulic system, are also provided. | 03-24-2016 |
20160084278 | HYDRAULIC DRIVE WITH RAPID STROKE AND LOAD STROKE - A hydraulic drive including a first differential cylinder that includes a first and a second pressure chamber and a first piston that separates the first from the second pressure chamber and having two pumps delivering in opposite direction. The hydraulic drive further includes a second differential cylinder that includes a first and a second pressure chamber and a second piston that separates the first pressure chamber from the second pressure chamber, and a directional control valve that has a first and a second switching position. The pumps in the first switching position are respectively hydraulically connected via pressure chambers of the first differential cylinder that are different from each other and whereby the pumps in the second switching position are respectively connected via pressure chambers of the second differential cylinder that are different from each other. | 03-24-2016 |
20160084279 | HYDRAULIC DRIVE WITH RAPID STROKE AND LOAD STROKE - A hydraulic drive including at least one hydraulic cylinder that includes a piston chamber, an annulus and a piston that separates the piston chamber from the annulus. The hydraulic drive further includes a first hydraulic pump that has a pump intake and a pump outlet, a directional control valve that has a first and a second switching position, and a second hydraulic pump. The second hydraulic pump has a direction of delivery that is consistent with the direction of delivery of the first hydraulic pump at the pump outlet, wherein the second hydraulic pump in the first switching position of the directional control valve is hydraulically connected with the piston chamber and the second hydraulic pump in the second switching position of the directional control valve is not hydraulically connected with the piston chamber. | 03-24-2016 |
20160084280 | HYDRAULIC DRIVE WITH RAPID STROKE AND LOAD STROKE - A hydraulic drive, preferably for a hydraulic press, having a first synchronized cylinder that comprises a piston between first and second pressure chambers; at least one hydraulic pump whereby the pump outlet is hydraulically connected with the first pressure chamber of the first synchronized cylinder and the pump inlet is hydraulically connected with the second pressure chamber of the first synchronized cylinder; at least a second synchronized cylinder that comprises a piston between first and a second pressure chambers; whereby the piston of the first synchronized cylinder is mechanically movably coupled with the piston of the second synchronized cylinder; whereby the first pressure chamber of the second synchronized cylinder is hydraulically connected with the pump outlet; and whereby the second pressure chamber of the second synchronized cylinder can be connected with the pump inlet when a pressure limit in the second pressure chamber of the second synchronized cylinder is exceeded. | 03-24-2016 |
20160090998 | GRID SCALE ENERGY STORAGE SYSTEMS USING REHEATED AIR TURBINE OR GAS TURBINE EXPANDERS - Electrical power systems, including generating capacity of a gas turbine, where additional power is generated from an air expander and gas turbine simultaneously from a stored compressed air and thermal system. | 03-31-2016 |
20160091004 | METHOD FOR CONTROLLING PRESSURE IN A HYDRAULIC ACTUATOR - In conventional load-sense systems, there is a delay between a hydraulic function being impeded by an external force and further motion of the function. This is typically due to cavitation on the low pressure side of the pump. Electro-hydraulic systems, however, typically respond very quickly because the low pressure side of the pump may be pressurized because the low-pressure side of the actuator may feed directly to the pump rather than going to tank. Thus, an operator cannot as easily rely on feedback for when a function has encountered an external load. This may result in loss of vehicle traction or other drawbacks. Therefore, provided is a system and method for mimicking a load-sense system's responsiveness using an electro-hydrostatic system via an induced passive or active time-delay. | 03-31-2016 |
20160102685 | SELF-CONTAINED ENERGY EFFICIENT HYDRAULIC ACTUATOR SYSTEM - The self-contained energy efficient hydraulic actuator system of the present invention includes a hydraulic cylinder, a servo motor that is configured to produce rated torque from zero RPM to maximum rated RPM with rotor speed/position feedback to a servo motor, a pump, and a solenoid valve that enables the hydraulic cylinder to maintain its position without the motor running. The system has the ability to hold a load in place without motor operation via the use of the solenoid valve, and therefore saves energy and extends the motor lifetime by minimizing the motor running time. | 04-14-2016 |
20160102687 | Hydraulic unit - A hydraulic unit includes two pressure connections for supplying devices, in particular hydraulic rescue devices, including a first hydraulic circuit with a first pump arrangement and a first pressure connection and a second hydraulic circuit with a second pump arrangement and a second pressure connection, wherein the pump arrangements are driven at the same time by a common drive, and wherein by a first valve switch the first hydraulic circuit can be connected to the second hydraulic circuit and by a second valve switch the second hydraulic circuit can be connected to the first hydraulic circuit. The valve switches include a spring acting in the direction of an initial position and from the first hydraulic circuit or from the second hydraulic circuit a first control line runs to the first valve switch and from the second hydraulic circuit or from the first hydraulic circuit a second control line runs to the second valve switch. | 04-14-2016 |
20160107524 | Hydrostatic Transmission System of a Mobile Machine Traveling on a Slope with a Tilt - A hydrostatic transmission device of a mobile machine having—at least one first motor and at least one second motor,—at least one first dual motor and at least one second dual motor each having first and second elementary motor,—the second elementary motor of the first dual motor is linked with the first motor by a serial duct,—the second elementary motor of the second dual motor is linked with the second motor by a serial duct,—each serial duct has a valve having an opening for passage of the fluid into the serial duct, said valve having a first position in which said opening has a maximum cross-section, and a second position in which said opening has a reduced cross-section, the movement of said valve between these two positions activated a control instruction generated when the machine is travelling on a slope. | 04-21-2016 |
20160108933 | METHOD AND SYSTEM FOR STORING AND REUSING HYDRAULIC ENERGY - A method for storing and reusing hydraulic energy in a machine is disclosed. The method includes transferring the hydraulic energy from an actuator to an upstream side of a motor pump via a first valve, during a normal mode. The method includes directing excess hydraulic energy from a downstream side of the motor pump to an accumulator by opening an accumulator valve and closing a bypass valve, during an energy saving mode. The method includes retrieving stored hydraulic energy from the accumulator to the upstream side of the motor pump by opening the accumulator valve, during an energy discharging mode. | 04-21-2016 |
20160108937 | PRESSURE MAINTAINING APPARATUS, MACHINE TOOL, AND METHOD OF RUNNING PRESSURE MAINTAINING APPARATUS IN MACHINE TOOL - A machine tool includes: a plurality of hydraulic devices including hydraulic balance cylinders; a main hydraulic unit including a main hydraulic pump and a pump motor for supplying hydraulic oil in an operation period; and a pressure-maintaining hydraulic unit connected in parallel to an oil supply line of the main hydraulic unit and including a pressure-maintaining hydraulic pump and a pump motor being smaller in output than the main hydraulic pump and the pump motor. When at least one of the hydraulic devices is operated, the hydraulic oil is supplied from the main hydraulic pump and the pump motor to the hydraulic devices. When all of the hydraulic devices are stopped, the hydraulic oil is supplied from the pressure-maintaining hydraulic pump and the pump motor to the hydraulic device in the standby period to maintain the pressure of the hydraulic oil in the hydraulic device. | 04-21-2016 |
20160116060 | HYDROSTATIC BRAKING CONCEPT - Hydrostatic transmission and method for decelerating a hydrostatic transmission with a closed hydraulic fluid circuit, in which a hydraulic pump drivable by a drive engine and a hydraulic motor are arranged and connected fluidly to one another through two working lines. Alternately depending on the operational mode and on the conveying direction of the hydraulic pump, one working line is the low pressure line and the other one is the high pressure line. The hydraulic pump as well as the hydraulic motor are adjustable in their respective displacement volumes by means of a control unit. The hydraulic motor comprises a housing in which a hydrostatic drive mechanism having an inlet and an outlet is arranged. In a connecting line connecting the outlet and the inlet a pressure control valve is arranged, which can be flown through in direction to the inlet. The pressure control valve opens if the high pressure present at the outlet exceeds a predetermined pressure limit of the pressure relief valve. During the coasting operation of the hydrostatic transmission the displacement of the hydraulic pump and/or of the hydraulic motor are adjustable by means of the control unit in function of the speed of the drive motor or of the speed of the hydraulic pump. | 04-28-2016 |
20160123352 | A METHOD AND AN ARRANGEMENT IN A FOREST WORK UNIT - A method and an arrangement in a forest work unit, comprising storing power produced by a primary power source in an energy storing means in at least one first phase of a working cycle of the forest work unit by controlling a hydraulic pump-motor to convert at least some of the power produced by the primary power source into hydraulic power and by supplying it to the energy storing means to be stored therein. At least one second phase of the working cycle of the forest work unit comprises supplying stored power from the energy storing means for driving at least one tool. | 05-05-2016 |
20160123354 | SHOVEL AND METHOD OF CONTROLLING SHOVEL - A shovel includes a lower-part traveling body, an upper-part turning body mounted on the lower-part traveling body, a hydraulic actuator mounted on the upper-part turning body, an internal combustion engine disposed in the upper-part turning body, provided with a supercharger, and configured to be controlled at a constant rotational speed, a hydraulic pump connected to the internal combustion engine, and a controller configured to control horsepower absorbed by the hydraulic pump. The controller is configured to increase a load on the internal combustion engine with the hydraulic pump before a load on the hydraulic actuator increases. | 05-05-2016 |
20160130986 | POWER CONDITIONING AND ENERGY STORAGE DEVICE USING HYDRAULIC-PNEUMATIC SEQUENTIALLY FIRED PULSE FORMING NETWORKS - The present invention includes a mechanical energy storage device and method of making and using the same comprising: two or more pneumatic or hydraulic capacitors or accumulators, each of them connected to at least one hydraulic or pneumatic exhaust manifold and a hydraulic or pneumatic intake manifold through exhaust and intake valves, respectively; at least one hydraulic fluid or pneumatic reservoir in fluid communication with the hydraulic or pneumatic exhaust manifold via a hydraulic or pneumatic motor connected to an output device, and in fluid communication with the hydraulic or pneumatic intake manifold via hydraulic pump or pneumatic compressor driven by a source of variable power; and a governor or control valve disposed between the hydraulic or pneumatic exhaust manifold and the hydraulic or pneumatic motor connected to the output device. The use of compressible gas, pneumatic, and air are interchangeable for the purposes of this device. | 05-12-2016 |
20160138583 | Variable Retraction Rate Pump and Method for Operating Same - A pump system includes a pump and a storage volume in fluid communication with a discharge port of the pump. The pump includes a housing defining a pump bore and a pump piston disposed in sliding engagement with the pump bore, the pump piston being in selective fluid communication with the discharge port of the pump. A method for operating the pump system includes determining a time to drain an amount of a first fluid from the storage volume, and retracting the pump piston within the pump bore at a target retraction rate based at least partly on the time to drain the first fluid from the storage volume. | 05-19-2016 |
20160138617 | Multiple Gas Generator Driven Pressure Supply - A pressure supply device in accordance to one or more aspects includes an elongated body having an internal bore extending from a power end to a discharge end having a discharge port, two or more gas generators connected to the power end and a hydraulic fluid disposed in the bore between a piston and the discharge end. The ignition of one of the gas generators drives the piston to exhaust a partial volume of the hydraulic fluid that is less than the total operational volume of the hydraulic fluid under pressure to operate at a connected device. | 05-19-2016 |
20160138618 | HYDRAULIC REGENERATIVE AND RECOVERY PARASITIC MITIGATION SYSTEM - A hydraulic system is disclosed for use with a machine. The hydraulic system may have a pump configured to pressurize fluid, a first actuator configured to receive pressurized fluid from the pump, and an accumulator configured to receive fluid from the first actuator. The hydraulic system may also have a second actuator configured to receive pressurized fluid from the pump and the accumulator, and a pilot circuit configured to receive pressurized fluid from the pump and the accumulator. The hydraulic system may further have at least one valve movable to provide priority of fluid flow from the accumulator to the pilot circuit over the second actuator when a pressure of the accumulator is less than a low-pressure threshold. | 05-19-2016 |
20160138619 | Conserve Energy Through Independent Pump Control in a Hydraulic System - A hydraulic system includes a first pump to provided pressurized fluid to a first hydraulic circuit and a second pump to provide pressurized fluid to a second hydraulic circuit. When the hydraulic system is in an energy conservation mode, the output power of the first pump is reduced to less than the hydraulic power demand of the first hydraulic circuit. | 05-19-2016 |
20160144893 | Hydrostatic Traction Drive System - A hydrostatic traction drive system of a mobile machine has a first hydraulic traction motor associated with a first vehicle side and a second hydraulic traction motor associated with a second vehicle side. The hydraulic traction motors are operated in an open circuit and are jointly supplied with hydraulic fluid by a single hydraulic pump. The first hydraulic traction motor is controlled by a first control valve and the second hydraulic traction motor is controlled by a second control valve. The first hydraulic traction motor and the second hydraulic traction motor are each variable displacement motors with an electrically variable displacement volume, and the first control valve and the second control valve are electrically actuatable control valves. | 05-26-2016 |
20160145834 | VENT FOR LOAD SENSE VALVES - A load sense passage in a load sense hydraulic system may be vented by allowing flow from the load sense passage to a reservoir via a drain passage when a first flow control valve is in a neutral position. This venting may be prevented by preventing flow from the load sense passage to a reservoir via the drain passage when the first flow control valve is in a flow-allowing position. | 05-26-2016 |
20160145835 | DEVICE FOR CONTROLLING CONTROL VALVE OF CONSTRUCTION MACHINE, METHOD FOR CONTROLLING SAME, AND METHOD FOR CONTROLLING DISCHARGE FLOW RATE OF HYDRAULIC PUMP - An apparatus and method for controlling a control valve, and a method for controlling a discharge flow rate of a hydraulic pump for a construction machine are disclosed, which can control a spool shifting speed of a directional valve and a discharge flow rate of a hydraulic pump in accordance with a hydraulic fluid temperature in winter season with below zero temperatures. The apparatus for controlling a control valve includes a variable displacement hydraulic pump; a hydraulic actuator driven by hydraulic fluid that is supplied from the hydraulic pump; a control valve installed in a flow path between the hydraulic pump and the hydraulic actuator and shifted to control a start, stop, and direction change of the hydraulic actuator; an operation lever outputting an operation signal corresponding to an operation amount; a temperature sensor detecting a hydraulic fluid temperature of a hydraulic fluid tank connected to the hydraulic pump; and a controller applying a control signal that corresponds to the operation amount of the operation lever | 05-26-2016 |
20160153533 | HYDROSTATIC VARIATOR | 06-02-2016 |
20160160884 | SYSTEMS AND METHODS FOR SELECTIVELY ENGAGED REGENERATION OF A HYDRAULIC SYSTEM - A hydraulic system and method for using the same are provided. The hydraulic system includes a pump, a first actuator having a first head chamber and a first rod chamber, and a second actuator having a second head chamber and a second rod chamber. The hydraulic system further includes a first control valve and a second control valve. The second control valve to selectively provide regeneration fluid flow from the first rod chamber to the first head chamber in response to a first function command is less than a first function command limit, a second function command is greater than a second function command limit, and a second function load is greater than a second function load limit. | 06-09-2016 |
20160169357 | HYDROSTATIC ASSEMBLY | 06-16-2016 |
20160169382 | Method for Controlling a Hydrostatic Drive | 06-16-2016 |
20160177721 | LIQUID RING TURBINE AND METHOD OF USE | 06-23-2016 |
20160186786 | Controller Apparatus for an Electro-Hydraulic Drive Unit - A drive control device for operating an electro-hydraulic drive which has an electric motor with a variable rotational speed, a hydraulic pump which is driven by the electric motor, a hydraulic consumer with a movable element and hydromechanical safety device which is configured to be able to interrupt a flow of hydraulic fluid between the hydraulic pump and the hydraulic consumer, comprises a controller configured to actuate the electric motor for operation, and to interrupt the operation of the electric motor. The drive control device is configured to actuate the hydromechanical safety device in such a way that the flow of hydraulic fluid between the hydraulic pump and the hydraulic consumer is interrupted. | 06-30-2016 |
20160195112 | PISTON-CYLINDER UNIT AND METHOD FOR OPERATING SAME | 07-07-2016 |
20160200198 | COMPRESSED-AIR SYSTEM | 07-14-2016 |
20160252106 | HYDRAULIC DRIVE AND METHOD FOR DISCREETLY CHANGING THE POSITIONAL OUTPUT OF SAID DRIVE | 09-01-2016 |
20160252109 | HYDRAULIC DISPLACEMENT CONTROL SYSTEM | 09-01-2016 |
20160252110 | Multi-Segment Reinforced Actuators and Applications | 09-01-2016 |
20160252112 | HYDRAULIC POWER TOOL | 09-01-2016 |
20160376768 | Valve Subassembly having at Least Two Pump Lines for a Pump - A valve subassembly includes a pump connection location, a tank connection location, and two constantly adjustable direction control valves each with first and second operating connection locations and an input connection location. A first valve group includes one direction control valve whose input is connected in parallel to two separate pump lines such that pressurized fluid is directed exclusively from the two pump lines to the control connection location. The two pump lines include a maximum of a first pump line and each remaining pump line is a second pump line. The maximum one first pump line is directly connected to the pump connection location in fluid terms, and a separate constantly adjustable pump diaphragm is associated with each second pump line. Pressurized fluid is directed from the pump connection location via the pump diaphragm into the associated second pump line. | 12-29-2016 |
20160376932 | ORC STACK-SYSTEM CONTROL - The invention relates to a method for controlling ORC stacks with a total number n | 12-29-2016 |
20160377097 | TRAVEL AND WORK FUNCTIONS INTEGRATED INTO A HYDRAULIC HYBRID SYSTEM - A series hydraulic hybrid system for a vehicle is described. The system has a hydraulic circuit, a hydraulic working assembly, and a hydraulic accumulator assembly. The hydraulic circuit has a first hydraulic displacement unit in fluid communication with a second hydraulic displacement unit. The first hydraulic displacement unit is drivingly engaged with a power source. The hydraulic working assembly has a hydraulic implement and a hydraulic working pump in fluid communication with the hydraulic implement, the hydraulic working pump drivingly engaged with the power source. The hydraulic accumulator assembly has a high pressure hydraulic accumulator and a low pressure hydraulic accumulator. The hydraulic accumulator assembly selectively fluidly connects to the hydraulic circuit and the hydraulic accumulator assembly selectively fluidly connects to the hydraulic working assembly. | 12-29-2016 |
20180023270 | METHOD FOR CONTROLLING FLOW RATE OF HYDRAULIC PUMP OF CONSTRUCTION MACHINE | 01-25-2018 |
20190145083 | CONTROL OF VARIABLE GRAVITY DRIVEN HYDRAULIC LOADS | 05-16-2019 |
20190145435 | Multi-Segment Reinforced Actuators and Applications | 05-16-2019 |