VOLVO CONSTRUCTION EQUIPMENT AB Patent applications |
Patent application number | Title | Published |
20160130787 | FLOW RATE CONTROL VALVE FOR CONSTRUCTION MACHINE - Disclosed is a flow rate control valve for a construction machine. A flow rate control valve for a construction machine comprises: a valve body having a pump channel for receiving operating oil from a hydraulic pump, a supply channel connected to the pump channel, and an actuator port connected to a hydraulic actuator; a spool installed inside the valve body to be switchable such that, when switched in response to application of signal pressure, the spool selectively causes the supply channel and the actuator port to communicate with each other; a tank channel installed inside the valve body and connected to an operating oil tank; and an orifice formed in the spool to have an inlet formed on an end and an outlet communicating with the tank channel, wherein, when the spool is initially actuated, a part of the signal pressure is discharged to the operating oil tank via the orifice. | 05-12-2016 |
20160115672 | A POWER SYSTEM FOR A WORKING MACHINE - A power system for a working machine includes a transmission for driving the working machine, the transmission including a continuously variable gear box having a gear unit and a hydraulic variator unit; a work hydraulic circuit for controlling at least one hydraulic actuator of the working machine; wherein the hydraulic variator unit is hydraulically connected to the work hydraulic circuit to hydraulically transfer energy from the hydraulic variator unit to the work hydraulic circuit. | 04-28-2016 |
20160102438 | ASSEMBLY FOR VIBRATING A COMPACTING DRUM OF A COMPACTING MACHINE - An assembly is provided for vibrating a compacting drum of a compacting machine. The assembly includes a shaft rotatably mountable to a compacting drum of the compacting machine. The centre of mass of the shaft is offset from the geometrical rotation axis of the shaft. An outer eccentric member is arranged outside of the shaft, wherein the centre of mass of the outer eccentric member is offset from the geometrical rotation axis of the shaft. The outer eccentric member is displaceably mounted relative to the shaft for adjustment of the eccentricity of the assembly. An extension of the outer eccentric member in a direction parallel with the geometrical rotation axis of the shaft is at least two times an average extension of the outer eccentric member in a radial direction perpendicular to the geometrical rotation axis of shaft such that a mass of the outer eccentric member forms a distributed load along the geometrical rotation axis of the shaft. | 04-14-2016 |
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 |
20160075268 | DUMP BODY FOR A WORKING MACHINE - A dump both for a working machine includes two main plates for creating a load receiving surface. The two main plates are joined to each other by a weld joint. The dump body includes a backing plate arranged on the two main plates at the inside of the dump body. The backing plate covers the weld joint and is joined to the two main plates by the weld joint. | 03-17-2016 |
20160003494 | ACTUATOR CONTROLLING DEVICE FOR CONSTRUCTION EQUIPMENT AND ACTUATOR CONTROLLING METHOD THEREFOR - An actuator control apparatus for a construction machine and a method for controlling the same are disclosed, which can provide a more convenient and simplified operator equipment operation environment through reduction of unnecessary switches. The actuator control apparatus for a construction machine includes a first key input means for displaying HVAC control screen information having a plurality of different pieces of HVAC mode information, a second key input means having a plurality of lower setting keys for selection of the specific HVAC mode and operator setting for a parameter of the selected HVAC mode, and a controller displaying the preset HVAC control screen information when a first key signal is input from the first key input means and differently controlling the operation of the actuator that matches the specific HVAC mode in accordance with the specific HVAC mode information selected by the second key input means and the operator setting parameter for the specific HVAC mode. | 01-07-2016 |
20160003124 | VIBRATION REDUCTION DEVICE OF MUFFLER TAIL-PIPE FOR CONSTRUCTION EQUIPMENT - The present invention relates to a vibration reduction device of a muffler tail-pipe for construction equipment, comprising: an engine hood provided to one side of an engine room for the protection of the peripheral parts including an engine and a muffler, and having a through hole at one side of the top surface thereof; the muffler provided to the lower portion of the engine hood in a state where the muffler is connected to one side of the engine; a tail-pipe of which one end is connected to the muffler and the other end is protruded to the outside by penetrating the through hole of the engine hood; and a plurality of elastic support parts for fixing the tail-pipe such that the tail-pipe is elastically supported by the engine hood. The present invention can maximally reduce the vibration transmitted to the tail-pipe by the elastic support means when the tail-pipe vibrates with the muffler due to the vibration of the muffler by the engine, as the tail-pipe connected to the muffler is elastically supported from the engine hood through the elastic support parts. Therefore, the present invention can solve the problem of the connection portion of the muffler and the tail-pipe being easily deformed or damaged by the concentration of the stress to the connection portion of the muffler and the tail-pipe as the tail-pipe vibrates with the muffler according to the vibration of the muffler. | 01-07-2016 |
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 |
20150377259 | CONSTRUCTION EQUIPMENT PRESSURE CONTROL VALVE - A pressure control valve for a construction machine is disclosed, which prevents self-weight descent of a working device due to leakage of hydraulic fluid in a neutral position of the working device. The pressure control valve for a construction machine includes a holding valve block having a pilot signal pressure port and a drain flow path formed thereon; a holding poppet having a back pressure chamber formed therein to intercept leakage of hydraulic fluid from the hydraulic actuator to the control valve in a neutral state; a first elastic member pressing the holding poppet and elastically biasing an intercepted path between the hydraulic actuator and the control valve; a piston sliding in the holding valve block when pilot signal pressure is input through the pilot signal pressure port; a pilot poppet shifted to drain the hydraulic fluid in the back pressure chamber toward a drain flow path of the control valve in response to movement of the piston; a second elastic member pressing the pilot poppet and elastically biasing an intercepted path between the back pressure chamber of the holding poppet and the drain flow path of the control valve; and an auxiliary drain path draining the leaking hydraulic fluid through a drain path of the holding valve block if the leakage of the hydraulic fluid occurs on a check valve that opens or closes the path between the back pressure chamber of the holding poppet and the drain flow path of the control valve. | 12-31-2015 |
20150367849 | A METHOD FOR CONTROLLING THE SPEED OF A VEHICLE - A method is provided for controlling the speed of a vehicle that includes a drive train for driving the vehicle and a predetermined preferred speed set. The method includes determining whether or not a substantially constant speed of the vehicle is requested, if it is determined that a substantially constant speed is requested, determining whether the requested speed lies within or outside of the predetermined preferred speed set, and if it is determined that the requested speed lies outside of the predetermined speed set, automatically adjusting the speed of the vehicle to a vehicle speed that is within the predetermined speed set. | 12-24-2015 |
20150361641 | SWING CONTROL SYSTEM FOR CONSTRUCTION MACHINES - The disclosed invention relates to a swing control system for construction machines and is useful in a construction equipment in which the shaking or jerking movement of the upper swing structure due to the moment of inertia thereof is controlled by a simple electrical hydraulic control system so that although the swing manipulation is abruptly and repeatedly performed during the excavation or dumping operation, an operator can control the soft swing start/stop of the upper swing structure in the swing operation of construction machine, thereby improving manipulability and work efficiency of the work apparatus. | 12-17-2015 |
20150354174 | METHOD FOR CONTROLLING DRIVING SPEED OF CONSTRUCTION MACHINERY - Disclosed is a method for controlling a driving speed of construction machinery for preventing a sudden change in the driving speed during a combined operation for operating a work device while driving an excavator. The method for controlling the driving speed of the construction machinery, according to one embodiment of the present invention, relates to the method for controlling the driving speed of the construction machinery comprising a lower driving body, a turning device for turning an upper turning body with respect to the lower driving body, a driving device, the work device, an electronic proportional valve for controlling the discharge flow rate of a hydraulic pump, and a controller. The method comprises: a first step of detecting the amount of operation of the driving device, the work device, and the turning device according to the operation of same; a second step of calculating a required working oil flow rate corresponding to the amount of operation of the driving device, the work device, and the turning device; a third step of reducing the required working oil flow rate of the driving device calculated in the second step, according to a ratio set by a driver, so that an independent maximum driving speed of the driving device can be reduced by the setting by the driver; and a fourth step of combining the required working oil flow rates calculated in the second step and the third step, and outputting a control signal to the electronic proportional valve so that the combined flow rate is discharged from the hydraulic pump. | 12-10-2015 |
20150334806 | LAMP CONTROL DEVICE OF CONSTRUCTION MACHINE AND LAMP CONTROL METHOD THEREFOR - The present invention relates to a lamp control device of a construction machine and a lamp control method therefor, wherein the control of a plurality of lamps (for example: a working lamp, a deck lamp, a cabin lamp and a rear lamp) which are provided in a construction machine can be carried out by a first key input means which is a single typical switch button and a second key input means which is provided with a plurality of sub-setting keys such that unnecessary switches are removed from the inside of a cabin, thereby providing a more convenient and simplified equipment operation environment for workers. | 11-19-2015 |
20150330058 | METHOD FOR CONTROLLING HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE - A method for controlling a hydraulic system for a construction machine is disclosed, which can minimize a loss of pressure through expansion of an open area of a confluence spool in the case of singly driving a working device such as a boom. The method for controlling a hydraulic system includes a first step of detecting pilot signals according to operations of operation levers for first and second working devices through first and second pressure sensing devices and transmitting the detected pilot signals to the controller; a second step of determining whether the operation is a single operation of the operation lever for the first working device; a third step of supplying secondary signal pressure by an electro-proportional value to the confluence spool to expand an open area of the confluence spool with respect to the same operation pressure of the operation lever for the first working device and discharging hydraulic fluid discharged from a second hydraulic pump in proportion to the operation amount of the operation lever for the first working device if the operation lever for the first working device is operated to exceed a determined section in the case of singly driving the first working device due to the single operation of the operation lever for the first working device; and a fourth step of supplying the secondary signal pressure by the electro-proportional value to the confluence spool in proportion to the operation amount of the operation lever for the first working device and dividedly supplying the hydraulic fluid discharged from the second hydraulic pump to the first and second working devices in the case of performing a combined driving of the first and second working devices due to simultaneous operations of the operation levers for the first and second working devices. | 11-19-2015 |
20150329034 | FOOTREST FOR CONSTRUCTION MACHINE OPERATING ROOM - Disclosed is a footrest for an operating room on which the operator can rest his foot in order to balance his body when he is operating in the operating room, or working on a slope, etc. The footrest for a construction machine operating room according to the present invention includes: a footrest support having one end pivotably attached to a front pillar member of the operating room by means of a hinge pin; a fixing grip arranged on the pillar member below the hinge pin so as to detachably fix the footrest support; and a fixing pin fastened to a bracket arranged at the pillar member to hold the footrest, the fixing pin being attached to the bracket so as to be moved forward and backward, so that the fixing pin may move forward to press the upper surface of the footrest support when pivoting the footrest support horizontally. | 11-19-2015 |
20150328988 | ENGINE OUTPUT DISPLAY CONTROLLER AND METHOD FOR DISPLAYING ENGINE OUTPUT MODE THEREOF - The present invention relates to a method for displaying an engine output mode of an engine output display controller and a device thereof, the method for displaying the engine output mode of the engine output display controller which is connected to a screen display unit and controls engine output mode information set by a worker so as to display the engine output mode information on a screen through the screen display unit, comprising a step for controlling the display operation of the screen display unit such that the engine output mode information set by a worker is distinguished from the entire allowable output mode information of a corresponding engine in the case where a difference is detected between a worker set mode and an engine output mode. Before the operation of equipment of which an engine output display controller is in an idling state, the engine output mode information set by a worker is displayed on the screen separately from the entire allowable output mode information of the engine and the idling state mode information, thereby enabling workers to confirm the level of engine output in advance before the worker operates the equipment. | 11-19-2015 |
20150322974 | DRIVING CONTROL DEVICE OF CONSTRUCTION MACHINE - Disclosed is a driving control device for securing the operability at the beginning of driving by operating a driving operation device so as to prevent the quick start of equipment at the time of starting. A driving control device of a construction machine, according to the present invention, comprises: a hydraulic pump; a driving motor; a control valve provided to a path between the hydraulic pump and the driving motor and controlling the starting, stopping and direction conversion of the driving motor at the time of conversion; a driving speed selection valve provided to a path between a pilot pump and the driving motor and controlling the swivel angle of the swash plate of the driving motor at the time of conversion; a driving operation device provided to a path between the pilot pump and the control valve and outputting second signal pressure for converting the control valve at the time of operation; an operation amount detection means for detecting the operation amount of the driving operation means; and a control unit for outputting control signals to the driving speed selection valve such that the driving motor is converted to a low speed state if the operation amount of the driving operation device, which is detected by the operation amount detection means, is smaller than a preset set value, and the driving motor is converted to a high speed state if the operation amount of the driving operation device is larger than the preset set value. | 11-12-2015 |
20150322648 | DEVICE AND METHOD FOR CONTROLLING FLOW RATE IN CONSTRUCTION MACHINERY - A flow control apparatus and a flow control method for a construction machine are disclosed, which can perform ground leveling work for smoothing the ground by the self weight of a boom without supplying hydraulic fluid from a hydraulic pump to a hydraulic cylinder. The flow control method for a construction machine including a hydraulic pump, a hydraulic actuator connected to the hydraulic pump, a control valve controlling a flow direction of hydraulic fluid supplied to the hydraulic actuator, a work mode switching valve installed in a flow path between the control valve and the hydraulic actuator to perform switching between a normal work mode and a floating mode, a detection means for detecting a boom-down operation amount of an operation lever operated by a user, an electronic proportional valve controlling a discharge flow rate of the hydraulic pump, and a controller, the flow control method including a first step of determining whether the present mode is switched to the floating mode; a second step of changing the discharge flow rate of the hydraulic pump corresponding to the boom-down operation amount detected by the detection means if the present mode is switched to the floating mode; and a third step of outputting an electrical control signal to the electronic proportional valve so that the hydraulic pump can discharge the hydraulic fluid at the changed flow rate corresponding to the boom-down operation amount. | 11-12-2015 |
20150321559 | METHOD FOR CONTROLLING VEHICLE-INFORMATION DISPLAYING BY MEANS OF ECU AND APPARATUS THEREFOR - The present invention relates to a method for controlling vehicle-information displaying by means of an ECU and an apparatus therefor, the method comprising the steps of: causing an ECU to collect the vehicle information displayed by the ECU in an instrument cluster; extracting the data of graphic attributes from the collected vehicle-information according to various pieces of vehicle information; sequentially arranging the extracted data of the graphic attributes according to the predetermined transmission order of a drawing communication protocol dedicated for displaying vehicle information; and streaming the sequentially arranged data of the graphic attributes to the instrument cluster. Thus, the present invention can control displaying in instrument clusters of different display specifications by using the ECU for supporting the drawing communication protocol. | 11-12-2015 |
20150308162 | DOOR LOCKING DEVICE AND CONSTRUCTION MACHINE INCLUDING SAME - Disclosed are a door locking device which enables a user on the ground to easily open or close a side door even in the case where the height of the side door is changed, and a construction machine including the same. The door locking device, according to the present invention, comprises: a locking device case which is mounted on a side door; an operation handle which is rotationally fixed to the case; a striker which is mounted on a door frame for supporting the side door such that the side door can be opened or closed; a link which is rotationally fixed to the case and a lower end of which is connected to a rotation plate that is interlocked when the operation handle is operated; and a locking unit which is separated from the operation handle and connected to the upper end of the link so as to be mounted on the inside surface of the side door in the upward direction of the case, and which is interlocked by the link when the operation handle is operated so as to be locked to or released from the striker. | 10-29-2015 |
20150308079 | A METHOD FOR RECOVERING ENERGY AND A HYDRAULIC SYSTEM - A method is provided for recovering energy in a hydraulic system of a working machine. The hydraulic system includes at least one hydraulic cylinder for movement of a load, and a fan driven by a hydraulic motor. The file method includes pressurizing the hydraulic cylinder with a load pressure at one of the piston side and the piston rod side of the hydraulic cylinder for moving the load, the load pressure substantially exceeding a pressure difference between the piston side and the piston rod side of the hydraulic cylinder required to move the load, creating a counter pressure at the other of the piston side and piston rod side of the hydraulic cylinder, where the counter pressure is created by means of the hydraulic motor while the hydraulic motor is driven by a hydraulic return flow from the hydraulic cylinder, by creating the counter pressure by means of the hydraulic motor while the hydraulic motor is driven by a return flow of hydraulic fluid from the hydraulic cylinder, the counter pressure created by the hydraulic motor being a function of the magnitude of the return flow driving the hydraulic motor and the load on the hydraulic motor. Energy consumption of a vehicle can be reduced in a simple and cost-effective way. | 10-29-2015 |
20150299984 | CONTINUOUSLY VARIABLE TRANSMISSION AND A WORKING MACHINE INCLUDING A CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission includes a variator unit having a variator input shaft and a variator output shaft; a first planetary gear set having a first, a second and a third planetary member, the first planetary member being one of a ring wheel and a planet carrier, the second planetary member being the other one of the ring wheel and the planet carrier, and the third planetary member being a sun wheel, wherein the first planetary member of the first planetary gear set is operatively connected to a transmission input shaft; and a second planetary gear set having a sun wheel, a ring wheel and a planet carrier, the planet carrier being operatively connected to a transmission output shaft; wherein the variator input shaft is operatively connected to the second planetary member of the first planetary gear set; the variator output shaft is operatively connected to the sun wheel of the first planetary gear set, the sun wheel of the first planetary gear set being further operatively connected to the sun wheel of the second planetary gear set while having a variable gear ratio between the transmission input shaft and the transmission output shaft; and the ring wheel of the second planetary gear set being selectively connectable to the second planetary member of the first planetary gear set and to a gearbox housing of the continuously variable transmission. | 10-22-2015 |
20150298730 | PRESSURIZED MEDIUM ASSEMBLY - A pressurized medium assembly includes a first working chamber and a second working chamber. The first and second working chambers are adapted to together produce a load. The pressurized medium assembly includes a first control arrangement adapted to provide a fluid communication between the first working chamber and a pressure line in an on/off manner. The pressurized medium assembly further includes a second control arrangement adapted to provide a fluid communication between the second working chamber and a pressure line. The second control arrangement is adapted to proportionally regulate the pressure in the second working chamber. | 10-22-2015 |
20150292571 | CLUTCH ARRANGEMENT COMPRISING A SHIFT PISTON AND A PISTON HOUSING - A clutch arrangement includes a shift piston and a piston housing. The shift piston is arranged to be displaced in an axial direction relative to the piston housing between at least one gear position and a neutral position. The clutch arrangement also includes a spring element for forcing the shift piston towards the neutral position. The clutch arrangement includes a first return piston and a second return piston arranged on opposite sides of the spring element, and the spring element is accommodated within a recess of the shift piston and is pretensioned between the first return piston and the second return piston. In the neutral position the first return piston is forced by the spring element against a first stop element of the shift piston, defining an end position for the first return piston relative to the shift piston, and the second return piston is forced by the spring element against a second stop element of the shift piston, defining an end position for the second return piston relative to the shift piston. | 10-15-2015 |
20150285241 | APPARATUS AND METHOD FOR CONTROLLING PREFERENTIAL FUNCTION OF CONSTRUCTION MACHINE - A priority function control apparatus for a construction machine and a control method thereof are disclosed, which enable an operator to set the order of preference or the extent of preference of an optional device in the case where a work is done through replacement of the optional device attached to an excavator. The priority function control apparatus includes a hydraulic pump and a pilot pump; an optional device and an attachment connected to the hydraulic pump; an attachment operation lever outputting an operation signal when an operator performs an operation; an optional device spool controlling a flow direction of hydraulic fluid that is supplied from the hydraulic pump to the optional device; an attachment spool controlling an amount and a flow direction of the hydraulic fluid supplied from the hydraulic pump to the attachment; an electrical operation device for the optional device; an electro proportional reducing valve outputting secondary signal pressure that corresponds to the operation signal of the electrical operation device for the optional device; a first pressure detection sensor detecting in real time signal pressure depending on the operation amount of the attachment operation lever to output a detection signal; and a controller limiting the signal pressure that is applied from the electro proportional reducing valve to the optional device spool by the operation of the electrical operation device for the optional device to a preset signal pressure if a priority function is applied depending on the operation amount of the attachment through detection of the first pressure detection sensor. | 10-08-2015 |
20150284934 | APPARATUS AND METHOD FOR CONTROLLING SWING OF CONSTRUCTION MACHINE - Disclosed are an apparatus and method for controlling the swing of a construction machine, which are capable of achieving a preferential boom-up function or a preferential swing function based on a swing angle during the loading work using a complex operation of a boom-up and swing. The method for controlling the swing of a construction machine, comprises: a first step of selecting a preferential boom-up function or a preferential swing function via an external input device; a second step of determining whether to operate a complex operation by an operation signal based on the operation of a boom joystick and a swing joystick; and a third step of variably controlling, if the preferential boom-up function is selected and if it is a complex operation condition, the degree of opening of an electro hydraulic valve for the swing so as to relatively limit the flow that is supplied from a hydraulic pump to a swing motor, and variably controlling, if the preferential swing function is selected and if it is a complex operation condition, the degree of opening of an electro hydraulic valve for the boom so as to relatively limit the flow that is supplied from the hydraulic pump to a boom cylinder. | 10-08-2015 |
20150278638 | METHOD FOR AUTOMATICALLY RECOGNIZING AND SETTING ATTACHMENT AND DEVICE THEREFOR - A method and an apparatus for automatically recognizing and setting an attachment for a construction machine are disclosed. The method for automatically recognizing and setting an attachment includes detecting a kind and a type of the attachment from an attachment image, determining whether the attachment is a registered attachment, and automatically setting inherent functional values that match the attachment if the attachment is a registered attachment as the result of determination and automatically setting a user input attachment ID and functional values if the attachment is not a registered attachment. By automatically recognizing and setting the attachment that is attached to (or changed on) a construction machine (for example, excavator) using image processing, equipment setting can be optimized and easily adopted. | 10-01-2015 |
20150276055 | GEAR BOX FOR A WORKING MACHINE AND A METHOD FOR CONTROLLING A GEAR BOX - A gear box for a working machine is arranged to be positioned in a first set of speed-changing gears and a second set of speed-changing gears. The gear box includes a gear box housing, an input shaft configured to receive torque, and an output shaft for supplying torque out, from the gear box, wherein the output shaft is connected to a planetary gear set of the gear box, a friction disc clutch arrangement which is arranged between a ring gear of the planetary gear set and the gear box housing for enabling connection of the ring gear to the gear box housing, and a control unit configured to controllably alternate the friction disc clutch arrangement between: an engaged state and an at least partially engaged state when the gear box is positioned in the first set of speed-changing gears, and between a disengaged state and an at least partially engaged state when the gear box is positioned in the second set of speed-changing gears. A corresponding method for controlling a gear box is also provided. | 10-01-2015 |
20150275932 | TWIN PRIORITY VALVE - A hydraulic system for a work machine including a first and a second hydraulic actuator, and a first and a second hydraulic machine for providing hydraulic fluid to at least one of the first and the second actuator via a first and a second priority valve respectively. The first and second priority valves are controlled by a pressure drop ΔP over the inlet valve of the first actuator such that when ΔP is lower than a first threshold value T | 10-01-2015 |
20150252594 | LOCK DEVICE FOR HOOD OF ENGINE ROOM OF CONSTRUCTION MACHINE - Disclosed is a lock device for a hood of an engine room of a construction machine, capable of limiting the motion of the hood in the left and right directions and the forward and backward directions by an external force generated by a vibration caused during operation when the hood is closed. The lock device for a hood of an engine room of a construction machine according to the present invention comprises: a catch device mounted on the inner surface of the hood; a latch device including a latch plate mounted on an upper frame and a striker mounted on the latch plate in the forward and backward directions to attach/detach a locker of the catch device, the latch device limiting the motion of the hood in the left and right directions when the hood is closed; and a position guide which is mounted on the inner surface of the hood, and which has, at a lower end thereof, a stopper protrusion to be detachably coupled to the sliding groove formed in one side of the latch plate, the position guide limiting the motion of the hood in the forward and backward directions when the hood is closed. | 09-10-2015 |
20150251893 | ARRANGEMENT, A METHOD AND A COMPUTER PROGRAM FOR CONTROLLING FILLING OF A TANK - An arrangement is provided for controlling filling of a tank. The arrangement includes a sensor for measuring the level of liquid in the tank and a filling nozzle having an entrance tot receiving a tilling handle and filling the tank. The filling nozzle is provided with a controllable magnet, and the magnet is arranged to be activated or deactivated based on measurements performed by the level sensor. A method and a computer program for controlling filling of the tank are also provided. | 09-10-2015 |
20150226136 | METHOD FOR PROTECTING ENGINE FROM SHORT CIRCUITING AND WIRE FAILURE OF FAN CLUTCH, AND DEVICE THEREOF - The present invention relates to a method for protecting an engine from short circuiting and wire failure of a fan clutch, and a device thereof wherein the method for protecting an engine comprises: a step of sensing the temperature of a coolant if a fan rotates at a set minimum rpm by the short circuiting and wire failure of a fan clutch; a step of comparing the sensed coolant temperature and a set danger temperature; and a step of defaulting if the sensed coolant temperature is lower than the set danger temperature and reducing the engine rpm if the sensed coolant temperature is equal to or higher than the set danger temperature according to a result of the comparison such that overheating of the engine can be prevented. The engine rpm is gradually lowered so as to protect the engine at a first stage if the fan operates at the minimum rpm due to the cable short cut and failure of the fan clutch, and the engine is forcedly stopped so as to protect the engine at a second stage if the overheating of the coolant is serious, thereby ensuring durability of the engine. | 08-13-2015 |
20150219127 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY - A hydraulic system for a construction machine is provided, which enables a user to set or release a preferential function when an excavation work or leveling work using an excavator is performed. The hydraulic system for a construction machine includes first and second hydraulic pumps connected to an engine; first and second hydraulic actuators connected to the first and second hydraulic pumps; main control valves (MCV) installed in flow paths between the first and second hydraulic pumps and the first and second hydraulic actuators, respectively, and having spools shifted to control a start, a stop, and a direction change of the first and second hydraulic actuators; first and second operation levers outputting operation signals in proportion to a user's operation amount; a control device limiting a flow rate that is applied to the spool of any one of the first and second hydraulic actuators that share the first and second hydraulic pumps according to a user's operation of the first or second operation lever for a preferential function; and a control unit controlling driving of the control device so as to shift to or release the preferential function according to a user's determination. | 08-06-2015 |
20150207359 | BATTERY CHARGING SYSTEM FOR HYBRID CONSTRUCTION MACHINERY BY USING ROTATIONAL FORCE OF FAN AND CHARGING METHOD THEREFOR - A battery charging system and a charging method thereof for a hybrid construction machine using a rotating force of a fan are disclosed. The battery charging system includes a fan, a controller controlling a braking device of the fan and a battery which is charged with electric energy. The charging method includes controlling, by the controller, a braking device of the fan to decrease a fan rotating speed down to a target fan rotating speed if the current target fan rotating speed, which is obtained depending on a current cooling water temperature, a hydraulic fluid temperature, and an engine intake air temperature, is lower than an actually measured fan rotating speed; and charging, by the braking device, electric energy which is caused by a rotating force that is generated while the fan rotating speed is decreased from the actually measured fan rotating speed to the target fan rotating speed in the battery. Since the electric energy generated by the rotating force is stored in the battery, the engine operation time is reduced, and thus a fuel efficiency can be improved. | 07-23-2015 |
20150204360 | HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY - The present invention relates to a hydraulic control valve for construction machinery that is used to maintain secondary pilot pressure which is formed proportionally to the switching of a switching device so as to be equal to or below a setting pressure of a pilot pump. The hydraulic control valve of the present invention includes: a port of the pilot pump into which the pilot pressure flows; a tank port to which the pilot pressure is drained; a valve body at which a secondary pilot pressure port that selectively communicates with the port of the pilot pump and the tank port is formed; the switching device that is pivotally mounted on the valve body; a pilot control valve that is linked through pressurization of the switching device and has a spool which forms the secondary pilot pressure proportional to the amount of switching of the switching device by communicating the port of the pilot pump and the secondary pilot pressure port with each other during the switching; a valve spring that elastically supports the spool so as to communicate the secondary pilot pressure port and the tank port with each other; and a check poppet that is disposed in an openable and closable manner at a pilot passage whose inlet side communicates with the secondary pilot pressure port and whose outlet side communicates with the port of the pilot pump. | 07-23-2015 |
20150204229 | STRUCTURE FOR PREVENTING HEAT OF MUFFLER FOR CONSTRUCTION MACHINE FROM BEING DIFFUSED - Disclosed is a structure for preventing the heat of a muffler from being diffused, which prevents the heat generated by the muffler from being diffused into the peripheral components in the engine room and discharges the heat through the engine hood to the outside. The structure for preventing the heat of the muffler for a construction machine includes a plurality of frames mounted on the bottom of the engine room outside the muffler, a shield supported by the frames so as to surround the outside of the muffler to form a shielding area, and a detachment means formed on one side of the shield. | 07-23-2015 |
20150202665 | COOLING DEVICE CLEANING SYSTEM FOR CONSTRUCTION MACHINE - A cleaning system of a cooling device for a construction machine is disclosed, which includes a moving body mounted on a cooling device core of the construction machine and having a suction unit beating and sucking pollution materials formed on a front surface of the cooling device core and a dust collection portion storing the pollution materials sucked by the suction unit. The cleaning system of a cooling device for a construction machine includes the suction unit installed on the front surface of the cooling device core to beat and suck the pollution materials formed on the cooling device core, a unit driving portion moving the suction unit upward and downward on the front surface of the cooling device core, the dust collection portion storing the pollution materials sucked by the suction unit, and a suction pipe connecting the suction unit and the dust collection portion with each other. | 07-23-2015 |
20150176251 | DRIVING CONTROL METHOD FOR CONSTRUCTION MACHINE - A traveling control method for performing a smoothing work or the like through an operation of a working device during traveling is provided. The traveling control method includes a first step of inputting a set value of a delay time of a traveling switching function of a traveling switching valve; a second step of inputting in real time an operation signal value according to a user's operation of a joystick and a traveling pedal; a third step of determining whether to operate the traveling and working devices according to the operation of the traveling pedal and the joystick; a fourth step of switching the traveling switching valve to a traveling switching mode through control of the electronic valve and returning to the second step when the traveling pedal and the joystick are simultaneously operated; a fifth step of determining whether the traveling pedal is operated and the operation of the joystick is temporarily stopped for a predetermined time; a sixth step of determining whether the set value of the delay time of the traveling switching function is larger than an initially set time required and switching the traveling switching valve to the traveling switching mode if the set value is relatively larger than the initially set time; and a seventh step of releasing the traveling switching mode of the traveling switching valve through control of the electronic valve and returning to the second step in the case where the traveling pedal is not initially operated, in the case where the traveling pedal is operated and the joystick operation has been stopped over the predetermined time, or in the case where the initially set time required is larger than the set value of the delay time. | 06-25-2015 |
20150176246 | CONSTRUCTION MACHINE ON WHICH COUNTERWEIGHT PROVIDED WITH MUFFLER IS MOUNTED - Disclosed is a construction machine in which a muffler for reducing the noise of exhaust gas emitted from the engine is mounted inside a counterweight. According to the present invention, the construction machine on which a counterweight having a muffler is mounted comprises: an upper frame pivotably mounted on a lower moving body; a driver compartment and an engine compartment mounted on the upper frame; a suction pipe communicating with the exhaust pipe of an engine mounted in the engine compartment, and into which exhaust gas flows; a muffler main body for reducing the noise of inflowing exhaust gas by means of a noise reducing device therein; a muffler comprising an exhaust pipe which emits the muffled exhaust gas to the outside; a working tool pivotably mounted on the front end of the upper frame and consisting of a boom, an arm, and a bucket which are respectively driven by a hydraulic cylinder; and a counterweight mounted on the rear end of the upper frame and having a compartment formed so as to mount the muffler therein. | 06-25-2015 |
20150159682 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE - A hydraulic system provided with a relief valve for a construction machine is disclosed, which can reduce a discharge flow rate of a hydraulic pump when a relief valve is operated. The hydraulic system for a construction machine includes a variable displacement hydraulic pump connected to an engine, an attachment operation device outputting an operation signal in proportion to an operation amount by an operator, an attachment actuator connected to the hydraulic pump to be driven by an operation of the attachment operation device, a control valve installed in a flow path between the hydraulic pump and the attachment actuator and shifted to control a start, a stop, and a direction change of the attachment actuator, an orifice installed in a flow path branched from a discharge flow path of the hydraulic pump, a relief valve installed on a downstream side of the orifice in the flow path, and a controller outputting a control signal to a flow control valve of the hydraulic pump so as to reduce a discharge flow rate of the hydraulic pump when a difference between pressures before and after the orifice exceeds a predetermined value. | 06-11-2015 |
20150159678 | FLOW CONTROL VALVE FOR CONSTRUCTION MACHINERY - Disclosed is a flow control valve for construction machinery, the flow control valve being adapted to reduce pressure loss due to flow on return to a hydraulic tank during the boom-down operation of a large-scale excavator. The flow control valve for construction machinery according to the present invention comprises: first and second boom spools which are respectively coupled to first and second boom valve blocks, and which regulate working fluid that is respectively supplied from first and second hydraulic pumps to a boom cylinder during direction reversal; a boom-up flow-adjusting means which, in direction reversal of the first and second boom spools for boom-up drive, supplies working fluid from the first and second hydraulic pumps into a large chamber of the boom cylinder via the first and second boom spools respectively, and causes part of the flow of working fluid from the second hydraulic pump to pass via the second boom spool so as to be combined with working fluid being supplied from the first hydraulic pump to the large chamber of the boom cylinder due to direction reversal of the first boom spool; and a boom-down flow-adjusting means which, in direction reversal of the first and second boom spools for boom-down drive, causes part of the flow of working fluid coming back from the large chamber of the boom cylinder to return to the hydraulic tank via the first and second boom spools respectively, and causes part of the flow of working fluid coming back from the large chamber of the boom cylinder to combine as respective regenerative flows for working fluid on the small chamber side of the boom cylinder. | 06-11-2015 |
20150159346 | APPARATUS FOR CONTROLLING A CASCADED HYBRID CONSTRUCTION MACHINE SYSTEM AND A METHOD THEREFOR - The present invention relates to an apparatus for controlling a cascaded hybrid construction machine system and a method therefor, which apparatus includes: a control part for controlling an electric motor for driving an actuator differently according to whether or not the actuator performs a recovery action and whether or not an energy storage device can be recharged; and a motor driver for driving or stopping the electric motor by switching under the control of the control unit, wherein when the actuator performs a recovery action for both the overcharged state and the failure state of the energy storage device, the motor for driving the actuator is temporarily stopped by the switching of the motor driver so as to restrain the recovery energy generated, thus protecting the hybrid power source system and keeping the operator safe as well as resolving the problem of the working time being increased due to the system's shutting off. | 06-11-2015 |
20150151251 | METHOD FOR DIAGNOSING A SELECTIVE CATALYTIC REDUCTION CATALYST - A method for diagnosing a selective catalytic reduction (SCR) catalyst of an exhaust aftertreatment system of an internal combustion engine includes ensuring that a SCR catalyst NH3 storage level is substantially below the current maximal NH3 storage capacity of the SCR catalyst, initiating over-injection of reductant by the injector, stopping reductant injection upon registering, by the exhaust gas sensor, an increasing NOx+NH3 emission level and an NOx+NH3 emission level exceeding a predefined threshold value, and when the reduction injection is stopped recording an output signal of the exhaust gas sensor until an indication of a minimal or negligible SCR catalyst NH3 storage level is determined, and calculating a SCR catalyst NH3 storage capacity on the basis of the recorded output signal. | 06-04-2015 |
20150134209 | BUCKET MOVEMENT CONTROL DEVICE FOR AUTOMATICALLY SHAKING OFF FOREIGN SUBSTANCES AND METHOD THEREFOR - An apparatus for controlling bucket movement for automatically shaking off foreign substances is disclosed, which includes a bucket movement control unit controlling the bucket movement by determining whether to output an automatic control signal for automatically driving the bucket forward and backward at a predetermined speed even if an input value of a joystick is not changed or to output a manual control signal for driving the bucket according to an operation value of the joystick, in accordance with a selection/non-selection of an automatic mode by an automatic mode selection switch, an operation value detected by an operation value detection means, and an operation angle detected by an operation angle detection means, and outputting a corresponding signal to a bucket driving unit. The movement of the bucket can be automatically controlled so as to control the foreign substances contained in the bucket and to sprinkle earth and sand without any separate operation of an operator. | 05-14-2015 |
20150123428 | CAB PROTECTION APPARATUS FOR CONSTRUCTION MACHINERY - A cab protection apparatus for protecting an operator from a cab structure that is deformed when an excavator turns upside down or a heavy object that drops on the cab is disclosed. The cab protection apparatus for a construction machine having a lower driving structure, an upper frame mounted to swing on the lower driving structure, a cab mounted on the upper frame, a working device rotatably mounted on the upper frame, and a protection structure mounted on an outside of the cab, includes a front guard hinge-fixed to a front support frame of the protection structure to be opened or closed so as to protect a front portion of the cab; and a locking device including a striker mounted on the front support frame and a latch mounted on the front guard to be locked to or unlocked from the striker. | 05-07-2015 |
20150121655 | APPARATUS FOR SEMI-AUTOMATICALLY OPENING/CLOSING DOOR OF CONSTRUCTION EQUIPMENT - Disclosed is an apparatus for opening/closing a door in which the door can be semi-automatically closed in a preset section so as to enable an operator in an operating cab to easily close the door. The apparatus for semi-automatically opening/closing door of construction equipment according to the present invention comprises: an upper hinge mounted on the door and having a first receiving hole; an upper option pin which is detachably coupled to a bottom surface of the upper hinge and the bottom surface of which has a first plane and a first inclined surface extending from the first plane; a lower hinge mounted on an operating cab and having a second receiving hole; a lower option pin which is detachably coupled to an upper surface of the lower hinge and the upper surface of which has a second plane and a second inclined surface extending from the second plane; and a guide pin, the upper end of which penetrates through the upper option pin and is coupled to the first receiving hole of the upper hinge, and the lower end of which penetrates through the lower option pin and is coupled to the second receiving hole of the lower hinge. | 05-07-2015 |
20150113970 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY - Disclosed is a hydraulic system for performing land preparation works by means of a simultaneous boom-up and arm-in operation. The hydraulic system according to the present invention includes: an arm cylinder and a boom cylinder that are connected to first and second hydraulic pumps, respectively; a first boom control valve that is disposed in the discharge flow path of the second hydraulic pump; a second boom control valve that is disposed in the discharge flow path of the first hydraulic pump and causes the working fluid of the first hydraulic pump to converge with the working fluid which is supplied from the second hydraulic pump to the boom cylinder; a first arm control valve that is disposed in the discharge flow path of the first hydraulic pump; a second arm control valve that is disposed in the discharge flow path of the second hydraulic pump and causes the working fluid of the second hydraulic pump to converge with the working fluid which is supplied from the first hydraulic pump to the arm cylinder; a recycle valve that is disposed in the flow path between the working fluid inlet port of the first arm control valve and a hydraulic tank; and a second boom control valve spool having a parallel pressure section in which the boom-up pilot pressure does not increase with respect to the boom-up strokes during the simultaneous boom-up and arm-in operation. | 04-30-2015 |
20150107539 | ARRANGEMENT AND A METHOD FOR CONTROLLING THE TEMPERATURE OF AIR BEING FED TO A VEHICLE ENGINE - An arrangement for controlling the temperature of air being fed to a vehicle engine includes an engine compartment in which the engine is arranged. The engine compartment is provided with an ambient air intake allowing an airflow into the engine compartment. The engine is provided with an engine air intake arranged inside the engine compartment. The arrangement further includes an air fan for forcing the airflow via the ambient air intake into the inside of the engine compartment. The engine air intake is arranged in a position allowing at least a substantial part of the airflow to enter the engine air intake. | 04-23-2015 |
20150060165 | HYBRID CONSTRUCTION MACHINE - Disclosed is a hybrid construction machine in which a power component, including a generator interposed between an engine and a hydraulic pump, has multiple mounting points so as to be stably supported. The hybrid construction machine according to the present invention comprises an engine and a generator mounted in an upper frame, a power component, including the generator, connected between the engine and a hydraulic pump, and a plurality of fixing plates fixed on the upper frame, each of which has a mounting hole for fixing the power component. | 03-05-2015 |
20150059329 | HYDRAULIC SYSTEM FOR CONSTRUCTION EQUIPMENT - A hydraulic system for a construction machine having a pressure compensation valve is disclosed, which improves operability when a combined operation of a swing device and an attachment is performed. The hydraulic system includes a hydraulic pump, attachment and swing operation devices, an attachment actuator and a swing motor connected to the hydraulic pump, a first control valve controlling hydraulic fluid being supplied to the actuator, a second control valve controlling hydraulic fluid being supplied to the swing motor, a check valve installed on a flow path for detecting load pressures of the actuator to take a maximum pressure of the load pressures, a first pressure compensation valve having an opening amount that is controlled by a difference between the maximum load sensing pressure and the pressure of a discharge flow path of the first control valve, a second pressure compensation valve having an opening amount that is controlled by a difference between the maximum load sensing pressure and the pressure of the discharge flow path of the second control valve, a maximum load pressure sensor detecting the pressure of a maximum load sensing pressure line, and a control unit controlling a discharge flow rate of the hydraulic pump, wherein the system is configured so that the swing load pressure is not connected to the first pressure compensation valve on the attachment side when a combined operation of the swing device and the attachment is performed. | 03-05-2015 |
20150051798 | METHOD FOR TIPPING A LOAD AND A TIPPING DEVICE - A method for tipping a load by a working machine is provided. The working machine includes a load carrier and at least one lift cylinder adapted to raise the load carrier for tipping the load. The method includes obtaining a measure of the inclination angle of the working machine, where the inclination of the working machine is such that the rear end of the working machine is higher than the front end thereof, allowing a first maximal tipping pressure to the lift cylinder for raising the load carrier when the inclination angle is smaller than a predefined inclination angle, and allowing a second maximal tipping pressure to the lift cylinder for raising the load carrier when the inclination angle is greater than the predefined inclination angle, and where the second maximal tipping pressure exceeds the first maximal tipping pressure. A tipping device, a working machine comprising such a tipping device, a computer program and a computer program product are also provided. | 02-19-2015 |
20150046044 | METHOD FOR SELECTING AN ATTACK POSE FOR A WORKING MACHINE HAVING A BUCKET - A method for selecting an attack pose, when loading piled materials, for a working machine having a bucket includes acquiring three dimensional pile data, generating a set of attack poses, generating a bucket trajectory through the pile for each attack pose, for each attack pose in the set of attack poses, calculating a measure of a convexity of the pile surface for an area of the pile surface delimited by a bucket width and a vertical projection of the bucket trajectory, and selecting an attack pose based on the measure of convexity. | 02-12-2015 |
20150018153 | METHOD FOR CONTROLLING A POWER SPLIT CONTINUOUSLY VARIABLE TRANSMISSION AND A POWER SPLIT CONTINUOUSLY VARIABLE TRANSMISSION - A power split continuously variable transmission is provided including a variator unit having a first and a second variable displacement hydrostatic machine and a planetary gear unit. The power split continuously variable transmission is arranged to be controlled to perform a simultaneous reduction of displacements of the first and second variable displacement hydrostatic machines during at least a part of a lock up state of the power split continuously variable transmission. A method of operating such a transmission is also provided. | 01-15-2015 |
20140375415 | SYSTEM FOR PREVENTION OF AND PROTECTION AGAINST FIRE DUE TO FUSE MISUSE - The present invention relates to a system including a slow blow fuse interposed between a high-capacity fuse and a load, and which blocks an overcurrent from flowing into the load with a fusing part melted to be cut when the overcurrent having passed through the high-capacity fuse is input. The system protects equipment from damage to wiring and from the danger of fire that occurs due to electric overloads arising from fuse misuse and faulty circuit modification. | 12-25-2014 |
20140367529 | HYDRAULIC LINE FIXING APPARATUS FOR BOOM SWING-TYPE EXCAVATORS - A hydraulic pipe fixing apparatus for a boom-swing type excavator is disclosed, which makes hydraulic hoses for attachments and hydraulic hoses for additional option devices be arranged in predetermined positions inside a boom supporter ( | 12-18-2014 |
20140366951 | METHOD FOR CONTROLLING LOWERING OF AN IMPLEMENT OF A WORKING MACHINE - A method for controlling lowering of an implement of a working machine is provided. The working machine has a hydraulic system including a hydraulic cylinder for moving the implement and a first control valve for controlling the flow of hydraulic fluid from the piston side of the hydraulic cylinder, and a recovery unit connected to the control valve for recovering energy by receiving a return flow from the piston side of the hydraulic cylinder. The piston side of the hydraulic cylinder and the control valve are connected to each other, and the piston rod side of the hydraulic cylinder is connected to the control valve and to the recovery unit in a point between the control valve and the recovery unit. The method includes identifying a requested lowering speed of the implement, and identifying a desired pressure at the piston side of the hydraulic cylinder and controlling the recovery unit to provide a counter pressure resulting in the desired pressure at the piston side of the hydraulic cylinder, and enabling fluid communication between the piston side of the hydraulic cylinder and the recovery unit, and between the piston side of the hydraulic cylinder and the piston rod side of the hydraulic cylinder, via the control valve, and controlling the control valve in such a way that the flow through the control valve corresponds to the requested lowering speed of the implement. | 12-18-2014 |
20140365014 | APPARATUS FOR SETTING DEGREE OF CONTROLLABILITY FOR CONSTRUCTION EQUIPMENT - An apparatus for setting an operational sensitivity for construction equipment is disclosed, which includes an operation amount detection means for detecting an operation amount of an operation lever, a control unit receiving the operation amount detected by the operation amount detection means and calculating a drive amount according to a relationship between a pre-stored operation amount and the drive amount (that is, operational sensitivity), an actuator operating according to the drive amount calculated by the control unit, and an input unit setting or changing the relationship between the operation amount and the drive amount stored in the control unit according to a user's key operation. The apparatus is so configured that a user can set the operational sensitivity according to an operation section of a proportional control operation device in the case where a proportional control type driving device is controlled using a proportional control type input device in the construction equipment, and thus the user can change the setting of the operational sensitivity according to an object mounted on the driving device or working conditions to improve the operation performance and to seek operator's convenience. | 12-11-2014 |
20140364268 | CONTINUOUSLY VARIABLE TRANSMISSION AND A WORKING MACHINE INCLUDING A CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission includes a variator unit having a variator input shaft and a variator output shaft, and a first, a second, a third and a fourth planetary gear set, wherein each of the first and second planetary gear sets has a first member operatively connected to a common transmission input shaft, which transmission input shaft is common to the first and second gear sets, and a second member operatively connected to an output shaft, which output shaft is common to the first and second gear sets. Each of the first and second planetary gear sets further includes a third member, and the third planetary gear set has a first, a second and a third member. | 12-11-2014 |
20140350731 | DRIVER SELF-TUNING METHOD USING ELECTRO-HYDRAULIC ACTUATOR SYSTEM - The present invention relates to a driver self-tuning method using an electro-hydraulic actuator system, the method comprising: a step in which a specific EHA system is selected by a HMI; a step of displaying a graph defining the mapping relationship of an actuator speed command with respect to a joystick command of the selected EHA system; a step in which, when a predetermined button is pressed by a user, the actuator maximum speed is tuned by multiplying the maximum speed value of the actuator of the selected EHA system, which has been pre-stored, by gain that increases or decreases in proportion to the number of times the button was pressed; and a step of storing the tuned actuator maximum speed in the upper controller of the EHA system. Equipment using the electro-hydraulic actuator system makes it possible to directly tune actuator speed characteristics that cannot be achieved with existing equipment using, by way of example, HMI display equipment and operating buttons. | 11-27-2014 |
20140348716 | EXHAUST GAS REDUCTION DEVICE FOR HEAVY EQUIPMENT - An apparatus for reducing an exhaust gas for heavy equipment is provided, which can satisfy the intensified diesel engine exhaust gas regulation conditions through further providing of the selective catalytic reduction (SCR) device in addition to the diesel particulate filter (DPF), and minimize an influence of vibration due to engine driving through mounting of the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) device on the cowl frame. The apparatus for reducing an exhaust gas includes a cowl frame mounted on one side of the main frame that is adjacent to the engine to reduce an influence due to vibration of the engine; a diesel particulate filter (DPF) having one end portion that communicates with the other end portion of the exhaust pipe and is mounted on an upper end portion of the cowl frame, provided with diesel oxidation catalyst (DOC) therein, and capturing particulate matters; a mixing pipe having one end portion that communicates with the other end portion of the diesel particulate filter, one side of which communicates with an injection device injecting a reducing agent; and a selective catalytic reduction (SCR) device mounted on an upper end portion of the cowl frame to communicate with the other end portion of the mixing pipe to accelerate a reduction reaction between the injected reducing agent and nitrogen oxides (NOx) in the exhaust gas. | 11-27-2014 |
20140345268 | TRAVEL CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - A travel control system is disclosed for preventing off-course travel of equipment due to the overloading of a working piece such as a boom during a complex operation involving vehicle travel and simultaneous driving of the working piece. The travel control system according to the present invention comprises: a left-side travel motor and first working piece coupled to a first hydraulic pump; a plurality of change-over valves for respectively controlling operating fluid supplied from the first hydraulic pump to the left-side travel motor and first working piece; a right-side travel motor and second working piece coupled to a second hydraulic pump; a plurality of change-over valves for controlling operating fluid supplied from the second hydraulic pump to the right-side travel motor and second working piece; a straight-ahead travel valve for supplying the operating fluid of the first hydraulic pump to the left-side and right-side travel motors and supplying the operating fluid of the second hydraulic pump to the first and second working pieces; and a control valve for blocking the supply of operating fluid from the second hydraulic pump, via the straight-ahead travel valve, to the left-side travel motor and right-side travel motor during complex operation involving travel and the working piece. | 11-27-2014 |
20140343820 | ALL-ROUND HAZARD SENSING DEVICE FOR CONSTRUCTION APPARATUS - An everywhere risk detection apparatus for construction equipment is disclosed, which includes an IECU generating and outputting a prevent signal to a VECU if a moving object in an image input from a camera is positioned within a set radius (or area) from the equipment, and generates and outputs the prevent signal to the VECU if a distance between the moving object in the image input from the camera and the equipment is shorter than a set distance. Accordingly, the equipment is compulsorily stopped regardless of an operator's equipment operation, and thus the occurrence of an accident is prevented. | 11-20-2014 |
20140343805 | METHOD FOR CONTROLLING OPERATION OF DUMP FOR CONSTRUCTION MACHINERY - A method for controlling dump driving for a construction machine is disclosed, which can improve operability through simultaneous operation of boom-up and swing according to an operation of a swing joystick during a dumping work. | 11-20-2014 |
20140339824 | INPUT/OUTPUT PIPE REINFORCING DEVICE FOR VEHICLE COMPRESSOR - The present invention relates to an input/output pipe reinforcing device for a vehicle compressor, whereby it is possible to prevent a linking area between the compressor and the input/output pipe from becoming damaged or deformed due to vehicle engine vibration and loads transmitted from the outside. The invention relates to a reinforcing device which is provided in the linking area between a compressor linked to the vehicle engine and an input/output pipe for the inflow or outflow of a coolant compressed in the compressor, wherein the reinforcing device comprises: a body part which surrounds the outer circumferential surface of the input/output pipe and comprises a first body formed to support the outer circumferential surface of the input/output pipe, and a second body formed corresponding to the first body; a hinge shaft which is provided on one side in the length direction of the body part, and which secures the first body and the second body in a mutually rotatable fashion; and a flange which is joined to the compressor and comprises a first expanded part formed expanding towards the outer circumferential edge of the first body at one end in the length direction of the first body, a second expanded part formed in the second body so as to correspond to the first expanded part, and a securing part formed in the portion where the first expanded part and second expanded part touch in order to secure the first body and the second body. | 11-20-2014 |
20140336905 | GOOD-EFFICIENCY RPM ZONE DISPLAY DEVICE FOR CONSTRUCTION MACHINERY - An apparatus for displaying an RPM section having a good efficiency for a construction machine is disclosed, which includes a control unit outputting different control signals depending on whether a current engine RPM belongs to a predetermined RPM section having the good efficiency, and a good-efficiency display unit selectively turning on or off an LED lamp according to the control signal output from the control unit. Since the RPM section having the good efficiency of the construction machine equipment is defined and the LED lamp for indicating the good-efficiency state is turned on if the current engine RPM belongs to the RPM section, a client can finally achieve good fuel efficiency in using the construction machine equipment. | 11-13-2014 |
20140332309 | STEERING SYSTEM FOR WHEELED CONSTRUCTION EQUIPMENT - Disclosed is a steering system which is capable of ensuring that a wheeled excavator travels straight while being driven on a paved road. The steering system for wheeled construction equipment includes: a hydraulic oil pump; a steering motor connected to the hydraulic oil pump; a steering valve controlling the operation of the steering motor; a steering handle operating the steering motor and the steering valve according to steering manipulation by the driver; and a steering cylinder steered by the manipulation of the steering handle. The steering system further includes an idle mode control unit which converts working mode into a steering mode not having straight line driving recovery performance when working mode, in which working and driving are enabled, is selected, and which converts exclusive driving mode into a steering mode having the straight line driving recovery performance through a signal input when the exclusive driving mode, in which only driving is enabled, is selected. | 11-13-2014 |
20140331661 | ENGINE CONTROL METHOD OF CONSTRUCTION MACHINE - An engine control system for a construction machine is disclosed, which can compulsorily stop engine driving when an attachment or the like malfunctions against an operator's intention during the operation of an excavator or the like. The engine control system includes a first step of determining whether pilot signal pressure, which is detected when at least one of an operation lever and a traveling pedal for respectively operating an attachment, a swing device, and a traveling device is operated, exceeds a first set pressure, and a second step of determining whether the pressure on the outlet side of a main hydraulic pump exceeds a second set pressure, wherein if the pilot signal pressure detected in the first step does not exceed the first pressure and the pressure of the main hydraulic pump detected in the second step exceeds the second pressure, engine driving is compulsorily stopped by means of a control signal from the controller. | 11-13-2014 |
20140325975 | SWING RELIEF ENERGY REGENERATION APPARATUS OF AN EXCAVATOR - Disclosed is a swing relief energy regeneration apparatus in which working oil relieved into a hydraulic tank is stored in a pressure accumulator during swing and deceleration to recycle the stored pressure. The swing relief energy regeneration apparatus includes: a hydraulic pump and hydraulic motor; a swing motor connected to the hydraulic pump through first and second paths; a flow rate control valve controlling the working oil supplied from the hydraulic pump into the swing motor; a first passage having both ends branched and connected to the first and second paths to allow the working oil to move in one direction toward the first or second path from the hydraulic tank; a second passage defined parallel to the first passage and having both ends branched and connected to the upstream sides of the first and second paths to allow the working oil to move in one direction toward the hydraulic tank from the first or second path; a pressure accumulator disposed in a recycling path having one end connected to the second passage and the other end connected to the hydraulic motor to store the working oil relieved into the hydraulic tank; and a sluice valve opened to supply the working oil into the hydraulic motor from the pressure accumulator when the manipulation amount of a manipulation lever for controlling the operation of the excavator exceeds a set value. | 11-06-2014 |
20140318878 | WORKING MACHINE AND A METHOD FOR OPERATING A WORKING MACHINE - A working machine includes a prime mover for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the prime mover and the driving wheels for transmitting torque from the prime mover to the driving wheels. The transmission line includes a gearbox arranged between the prime mover and the wheels, and the working machine further includes at least one hydraulic machine in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine, and an electric machine for driving or braking the driving wheels and/or for driving or braking the at least one hydraulic machine. The electric machine is arranged in parallel with the prime mover with respect to the transmission line and is mechanically connected to the transmission line between the prime mover and the gearbox. The gearbox is a continuously variable transmission having a variator unit, and the gearbox has an operation mode where the rotation speed of the output shaft of the gearbox is zero or close to zero independently of the rotation speed of the input shaft of the gearbox at the same time as torque can be transmitted from the input shaft to the output shaft. | 10-30-2014 |
20140257578 | CONTROLLING DEVICE USED TO SAVE FUEL FOR CONSTRUCTION MACHINERY - A control apparatus for fuel savings for a construction machine is disclosed, which can set engine and pump input torques to be in a high efficiency section at an equal level of the final output horsepower of a pump if a fuel saving mode is selected through an installed fuel saving mode switch, and thus can obtain a fuel saving effect for an equal amount of work. | 09-11-2014 |
20140252785 | DEVICE FOR OPENING AND CLOSING THE ENGINE HOOD OF A CONSTRUCTION MACHINE - An apparatus for opening and closing an engine hood for a construction machine is disclosed that can open an engine hood, which is mounted on an engine room of a small excavator or the like to be opened and closed by a gas spring so that an operator opens the engine hood during checking and repairing various kinds of components in the engine room, at an angle desired by an operator. The apparatus for opening and closing an engine hood includes a frame having one side fixed to an upper swing structure and the other side fixed to a cowl frame, a guide rail having a guide groove formed in a length direction and a plurality of seat portions formed to be cut so as to communicate in a downward direction with respect to the guide groove and maintaining an opening angle that is set to open the engine hood in multiple stages, and a stay rod having a free end slidably formed along the guide rail and a fixed end rotatably fixed to the engine hood. | 09-11-2014 |
20140252179 | DEVICE FOR FIXING THE HYDRAULIC PIPING OF CONSTRUCTION EQUIPMENT - Provided is a device for fixing hydraulic piping to prevent the hydraulic piping from sliding down even when the bolt for coupling a clamp which fixes the hydraulic piping is loosened by the vibration generated during operation. The device for fixing the hydraulic piping of construction equipment includes: a piping sheet fixed to a boom structure; upper and lower clamps constituted by a fixed part fixed to the piping sheet and a concave groove for supporting the hydraulic piping; a coupling member for fixing the fixed part to the piping sheet; a hydraulic pipe fixing plate mounted on the piping sheet; a connecting hole for connecting a main pipe, which is connected to a main control valve mounted on an upper rotating body, to the hydraulic pipe disposed on the boom structure; and a bolt and nut for fixing the connecting hole to the hydraulic pipe fixing plate. | 09-11-2014 |
20140246899 | LOWER TRACK OF CRAWLER EXCAVATOR - Disclosed is a lower track for mounting rubber pads on a track shoe to be attachable and detachable after assembling a steel plate which is adhered with divisionally formed rubber pads as a single unit without additionally perforating coupling through-holes in the track shoe when the rubber pad which forms the lower track and the track shoe which is formed of a metal material are coupled. The lower track of a crawler excavator according to the present invention comprises: first and second rubber pads which are divisionally formed; a first steel plate which supports the bottom surface of the first rubber pad by surrounding the same, and has first hooks formed on the bottom surface thereof and coupling holes formed in a connection stepped-portion, which is formed at the opposite side of the first hooks; a second steel plate which supports the bottom surface of the second rubber pad by surrounding the same, and has second hooks formed on the bottom surface thereof, connection protrusions formed at the opposite side of the second hooks so as to be secured on the connection stepped-portion, and connection through-holes formed in the protrusions so as to correspond to the coupling holes; and coupling members sequentially passing through the through-holes formed in the second rubber pad and the through-holes formed in the second steel plate so as to be fixed in the coupling holes of the first steel plate. | 09-04-2014 |
20140245734 | HYBRID EXCAVATOR HAVING A SYSTEM FOR REDUCING ACTUATOR SHOCK - Disclosed is a hybrid excavator which reduces the impact generated at the start of the operation of the boom cylinder, or the like, of a hybrid excavator. The hybrid excavator according to the present invention comprises: a hydraulic pump motor connected to an electric motor and operated in the forward or reverse direction; a hydraulic cylinder connected to the hydraulic pump motor and operated in an expanding manner; a first and second hydraulic valve installed in a first and second passage, respectively, between the hydraulic pump motor and the hydraulic cylinder, for blocking the first and second passages when switched by an external control signal; a third hydraulic valve installed in the connecting path connected to first and second dividing passages. | 09-04-2014 |
20140244118 | SYSTEM FOR CONTROLLING LAND LEVELING WORK WHICH USES AN EXCAVATOR - A grading control system using an excavator is disclosed, which determines and controls an operation amount of an attachment by combining an estimated pose of the attachment and an operator's operation signal of a joystick when a working mode for grading the ground is selected. The grading control system using an excavator includes an actuator connected to a hydraulic pump, an attachment driven by the actuator, a control valve shifted to drive the actuator, an electric joystick, a pressure detection means, a means for setting a working mode, and a controller, and repeatedly performs receiving a joystick operation signal value, a pressure value of an arm cylinder, and information on whether to set the working mode, calculating an external force that is applied to the attachment by the pressure value generated in the arm cylinder if a grading mode is selected, estimating a pose of the arm by the calculated external force value, performing a signal process by filtering the pose of the arm, and calculating operation amounts of a boom and the arm by combining the estimated pose of the arm and a control signal value according to an operator's operation of the joystick and proceeding to an initial stage. | 08-28-2014 |
20140238010 | CONTROL SYSTEM FOR OPERATING WORK DEVICE FOR CONSTRUCTION MACHINE - Disclosed is a control system for controlling flow so as to allow simultaneous usage of a parallel flow path and a tandem flow path thereby reducing loss of pressure inside a control valve, when simultaneously operating work devices having different operating pressures. A control system for operating the work device, according to the present invention, provides the control system for operating the work device for a construction machine, comprising: first and second hydraulic pumps that are connected to an engine; a revolution control valve, an arm control valve, and a left driving control valve, which are installed on a first center bypass path of the first hydraulic pump, and each of which is connected via the parallel flow path; a boom control valve, a bucket control valve, and a right driving valve, which are installed on a second center bypass path of the second hydraulic pump, and each of which is connected via the parallel flow path; a pressure generation device; a bleed flow path, which is formed on a control spool at a lower side of a boom of the boom control valve, for maintaining an open state of the second center bypass path without closing same, when the boom control valve is switched so as to lower the boom; and a center bypass switch valve, which is installed on the lowermost side of the second center bypass path and is switched by means of a control signal for switching the boom control valve. | 08-28-2014 |
20140232135 | APPARATUS FOR PROTECTING COMPONENTS OF AN EXCAVATOR - The present invention relates to a structurally improved apparatus for protecting components of an excavator, which protects components inside an upper swing body comprising a hydraulic valve and a turning joint from damage from residue (R) such as rock fragments or stone fragments falling to the bottom of a boom base during scratch processing in a quarry mine. The apparatus comprises: a boom base supporting the bottom of a boom; a left and right cover support frame formed on a left and right center frame extending from the boom base; and a protective cover body detachably installed on the top of the left and right cover support frame. The protective cover body comprises: an inserting portion coupled to the back of the boom; a dipping plate for absorbing shock when residue falls; and a bottom plate formed on the bottom of the damping plate and contacting and supported on the upper side of the left and right cover support frame. | 08-21-2014 |
20140230643 | ACTUATOR DISPLACEMENT MEASUREMENT SYSTEM IN ELECTRONIC HYDRAULIC SYSTEM OF CONSTRUCTION EQUIPMENT - An actuator displacement measuring system in an electro-hydraulic system for a construction machine is disclosed, which can detect an actuator displacement using the characteristics of an electro-hydraulic system. The actuator displacement measuring system includes controlling driving of an electric motor, determining whether the electric motor is driven, determining whether a set pressure value of a relief valve is larger than or equal to a measured pressure value of the hydraulic system if a displacement value of an actuator that is always detected deviates from a zero value of a reference position, setting the actuator displacement value to a previous value if a pressure value of the hydraulic system is larger than or equal to a pressure value of a relief valve and calculating the actuator displacement value using a rotating speed of the electric motor. | 08-21-2014 |
20140207346 | METHOD FOR CONTROLLING A WORKING MACHINE - A method for controlling a working machine provided with a bucket as a work implement by which a lifting force can be exerted on an object such as a gravel pile, and at least one ground engaging element by which a traction force can be exerted on the same object is provided. A state input indicative of a current bucket state is received, the bucket height being a parameter of the current bucket state, determining a lifting force eliminating speed of the power source (“LFES”) at the current bucket state, the LFES being the speed at and above which no lifting force could be achieved considering a reaction force acting on the bucket caused by the traction force, and the speed of the power source is controlled not to reach the LFES in order that at least some lifting force could be achieved. | 07-24-2014 |
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 |
20140174071 | HYDRAULIC CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - The present invention relates to a hydraulic control system for construction machinery capable of variably adjusting a set pressure of a relief valve, which controls a set pressure of a hydraulic system, according to a value inputted by means of pressure in the hydraulic system or the manipulation of a joystick. The hydraulic control system comprises: a flow control valve installed in a passage between a hydraulic pump and a hydraulic actuator, for controlling the driving of the hydraulic actuator by being switched by a control signal according to the manipulation of the joystick; a main relief valve installed in a passage between an upstream-side discharge passage of the hydraulic pump and a hydraulic tank, for returning a working fluid to the hydraulic tank when a high load exceeding a set pressure occurs in the system; a pressure controlling means for controlling, either continuously or in stages, a set pressure of the main relief valve; a pressure sensing means for sensing a pressure at a discharge side of the hydraulic pump; and a controller for determining the value inputted by the manipulation of the joystick, and a required set pressure for the relief valve according to the system pressure sensed by the pressure sensing means, and then outputting a control signal to the pressure controlling means to enable a set pressure of the relief valve to be variably adjusted to a determined set pressure. | 06-26-2014 |
20140165968 | FUEL SYSTEM FOR AN EXCAVATOR - A fuel system is disclosed which is adapted to improve engine ignition properties by ensuring that, when the engine ignition is turned off, residual fuel left over in the engine area after use is not returned to the fuel tank but instead remains in a common rail injector area. The fuel system for an excavator according to the present invention comprises: a fuel tank having a fuel supply line for discharging fuel and a return line for returning residual fuel after combustion in the engine area; a water-fraction separator which is provided downstream of the fuel tank, removes the water fraction contained in the fuel that is sucked in, and consists of a hand pump that is linked to the fuel supply line and of a first filter that is linked to the hand pump and filters out extraneous material in the fuel; an injection pump which is provided downstream of the water-fraction separator and which provides an injector with a high pressure supply of the fuel, from which the extraneous material has been filtered out on passing through the first filter and a second filter linked thereto, such that said fuel is sprayed into an engine combustion chamber; a fuel control unit which is respectively linked to the second filter and the injection pump and controls the injection pump so as to control the volume of fuel supplied to the injector; and a check valve which is provided in the return line and ensures that, when the equipment is made to stop working because the engine ignition is turned off, residual fuel left over in the engine area after use is not returned to the fuel tank along the return line but instead remains in the injector area. | 06-19-2014 |
20140158235 | HYDRAULIC CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - A hydraulic control system for a construction machine is disclosed, which can operate an arm cylinder and a bucket cylinder by supplying hydraulic fluid from respective hydraulic pumps to the arm cylinder and the bucket cylinder during a combined operation, such as an excavating work, in which an arm joystick and a bucket joystick are simultaneously operated. The hydraulic control system includes a first arm control valve installed in a flow path between the first hydraulic pump and the arm cylinder and shifted to control a start, stop, and direction change of the arm cylinder in response to an operation of the arm joystick, a second arm control valve installed in a flow path between the second hydraulic pump and the arm cylinder and shifted to make discharged hydraulic fluid of the second hydraulic pump join hydraulic fluid of the arm cylinder to be supplied if a control signal according to the operation of the arm joystick exceeds a set value, a bucket control valve installed in a path between the second hydraulic pump and the bucket cylinder and shifted to control a start, stop, and direction change of the bucket cylinder in response to the operation of the bucket joystick, and a confluence cutoff proportional valve installed in a path between the second hydraulic pump and the second arm control valve. | 06-12-2014 |
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 |
20140145429 | SWIVEL JOINT FOR CONSTRUCTION MACHINERY - A swivel joint for a construction machine is disclosed, which is used to connect hydraulic pipes which supply a flow rate from a hydraulic pump mounted on an upper swing structure that swivels against a lower driving structure to components, such as a traveling motor and a steering cylinder, mounted on the lower driving structure. The swivel joint includes a hub mounted on any one of the lower driving structure and the upper swing structure and provided with a hydraulic fluid movement port formed thereon, a shaft mounted on the other of the lower driving structure and the upper swing structure and rotatably coupled to the hub, the shaft having a hydraulic fluid movement path formed in an axis direction to communicate with the port of the hub, and a planar thrust bearing mounted on a cover that is integrally fixed to the hub on an upper side of the shaft to rotate in a body with the hub when the upper swing structure swivels against the lower driving structure and to be in frictional contact with an upper surface of the shaft to rotatably support the shaft in the axis direction. | 05-29-2014 |
20140145415 | METHOD FOR CONTROLLING A WORKING MACHINE, AND A WORKING MACHINE - A method is provided for controlling a working machine that includes a front section having a frame and a pair of wheels arranged on a geometrical front wheel axis, and a rear section having a frame and a pair of wheels arranged on a first geometrical rear wheel axis and a pair of wheels arranged on a second geometrical rear wheel axis arranged behind the first rear wheel axis. The front section and the rear section are pivotally connected to each other for pivoting about a substantially vertical pivot axis. In a first control mode the wheels of the second geometrical rear wheel axis are steered to substantially follow the same tracks as the wheels of the geometrical front wheel axis when driving the working machine during cornering, and in a second control mode steering the wheels of the second geometrical rear wheel axis follow tracks which are different from the tracks of the wheels of the geometrical front wheel axis. | 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 |
20140137956 | HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY - Provided is a hydraulic control valve in which a center bypass passage is not blocked, but is unloaded when a swing and an arm are operated at the same time to prevent the pressure in a hydraulic pump from being increased. The hydraulic control valve includes: a hydraulic pump connected to an engine; a swing spool disposed upstream of a center bypass passage communicating with a discharge passage of the hydraulic pump to control the operation and stopping of a swing motor and directional switching of the swing motor when switched; an arm spool disposed downstream of the bypass passage to control the operation and stopping of an arm cylinder and directional switching of the arm cylinder when switched; and a center bypass control valve disposed within the arm spool, the center bypass control valve being switched by a discharge flow pressure of the hydraulic pump which is increased when a multi operation for simultaneously operating the swing and the arm is performed, and unloading the increased swing side pressure to the center bypass passage when switched. | 05-22-2014 |
20140137732 | FLOW CONTROL VALVE FOR CONSTRUCTION MACHINERY - A flow control valve for a construction machine is disclosed, which enables a combined operation for simultaneously operating a working device, such as an arm, and a swing device to be easily performed by limiting a part of hydraulic fluid that is supplied to the working device side by a priority valve that is shifted simultaneously or releasing the limiting function through shifting of a spool of the priority valve to a neutral position by pilot signal pressure that is separately applied according to a type of work. | 05-22-2014 |
20140137549 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY - Disclosed is a hydraulic system for controlling the degree of openness of an arm regeneration valve by driving an electronic proportional control valve during a combined operation of simultaneously operating an arm and a swing device. The hydraulic system for construction machinery according to the present invention is characterized by comprising: a hydraulic pump; a control valve for controlling the discharge flow from the hydraulic pump; an arm cylinder and a swing motor, each connected to the hydraulic pump; an arm controlling device and a swing controlling device; a pressure detecting means for the hydraulic pump; a controlled amount detecting means for the arm controlling device; a controlled amount detecting means for the swing controlling device; an arm control valve for controlling the driving of the arm cylinder; a swing control valve for controlling the driving of the swing motor; an arm regeneration valve for controlling the pressure at an upstream return passage of the arm control valve when the arm naturally descends; an electronic proportional control valve for outputting a signal voltage for switching the arm regeneration valve; and a controller for performing a control so as to generate a secondary signal voltage by outputting electrical control signals to both the control valve and the electronic proportional control valve so as to correspond to detection signals inputted from the pressure detecting means and controlled amount detecting means. | 05-22-2014 |
20140119827 | ASPHALT PAVEMENT CONSTRUCTING MACHINE AND METHOD OF OPERATION - The present invention relates to an asphalt pavement constructing machine and a method for operating an asphalt pavement constructing machine provided with an asphalt compacting surface for compacting asphalt mix on a paving surface during an asphalt pavement formation operation. At least one exciter is provided that vibrates the compacting surface at one or more frequencies selected to prevent the asphalt mix from adhering to the compacting surface. | 05-01-2014 |
20140090368 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY - A hydraulic system for a construction machine is disclosed, which can prevent off-course travel of the machine when a combined operation of a traveling device and a working device such as a boom is performed. The hydraulic system for a construction machine includes first and second hydraulic pumps, left and right traveling operation levers and actuator operation levers for first and second working devices, a left traveling motor connected to a discharge flow path of the first hydraulic pump and an actuator for the first working device, a right traveling motor connected to a discharge flow path of the second hydraulic pump and an actuator for the second working device, a first pressure compensated valve installed on one side of an upper stream and a downstream of the first control valve, a second pressure compensated valve installed on one side of an upper stream and a downstream of the second control valve, a third pressure compensated valve, a fourth pressure compensated valve installed on one side of an upper stream and a downstream of the fourth control valve, a first orifice connected to the first pressure compensated valve of the first control valve, a first load sensing line connected to the fourth pressure compensated valve of the fourth control valve, and a hydraulic tank, a second orifice connected to the second pressure compensated valve of the second control valve, a second load sensing line connected to the third pressure compensated valve of the third control valve, and the hydraulic tank, a confluence valve installed in a confluence flow path of the first and second hydraulic pumps, a traveling communication valve installed in a flow path connecting the downstream of the left traveling first pressure compensated valve to the downstream of the right traveling third pressure compensated valve, and a controller controlling communication of the traveling communication valve when a combined operation for simultaneously operating the traveling device and the working device is performed. | 04-03-2014 |
20140088834 | ARTICULATED VEHICLE WITH A CONTROLLABLE WHEEL ROUTE - An articulated vehicle with a controllable wheel route includes a first vehicle body, a first pair of wheels, which are individually suspended on both sides of the first vehicle body, and can travel on the ground, a second vehicle body hingedly connected to the first vehicle body, a second pair of wheels, which are individually suspended on both sides of the second vehicle body, and can travel on the ground, a regulator, which regulates a relative steering angle between the first vehicle body and the second vehicle body, a mode selector, which is configured to select a first mode and a second mode, and a controller, which receives the first mode signal or the second mode signal from the mode selector and controls the regulator according to the received signal. The route of a second pair of wheels is regulated to be identical to the route of a first pair of wheels in the first mode, and the route of a second pair of wheels is regulated to be different from the route of a first pair of wheels in the second mode. | 03-27-2014 |
20140083092 | HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT - A hydraulic circuit for construction equipment is provided, which supplements hydraulic fluid of a hydraulic pump for a cooling fan and hydraulic fluid of a main hydraulic pump and uses the supplemented hydraulic fluid as a hydraulic source of a RCV in order to supply signal pressure to a control valve that controls the driving of a hydraulic actuator. The hydraulic circuit includes first to third hydraulic pumps, a first control valve installed in a flow path of the first flow path, a second control valve installed in a flow path of the second hydraulic flow path, a hydraulic motor connected to the third hydraulic pump, a cooling fan connected to the hydraulic motor, a first shuttle valve having an input portion connected to the first hydraulic pump and the third hydraulic pump, a second shuttle valve having an input portion connected to the second hydraulic pump and the third hydraulic pump, and a pilot pressure generation device installed in a pilot flow path connected to the output portions of the first and second shuttle valves and shifted to supply the hydraulic fluid having a relatively high pressure among the hydraulic fluids of the first to third hydraulic pumps to the first and second control valves as pilot signal pressure. | 03-27-2014 |
20140081523 | VEHICLE WITH A CONTROLLABLE WHEEL ROUTE - A vehicle with a controllable wheel route includes a vehicle body, a first pair of wheels, which are individually suspended on both sides of the vehicle body to roll on the ground and can rotate around the vertical axis, a second pair of wheels, which are individually suspended on both sides of the vehicle body to roll on the ground, can rotate around the vertical axis, and are placed in the back of the first wheels, a regulator, which regulates each steering angle on the vertical axis of the first and second wheels, a mode selector, which is configured to select a first mode and a second mode, and a controller, which receives the first mode signal or the second mode signal from the mode selector and controls the regulator according to the received signal. The second wheel route is regulated to be identical to the first wheel route in the first mode, and the second wheel route is regulated to be different from the first wheel route in the second mode. | 03-20-2014 |
20140064850 | SURFACE COMPACTOR AND METHOD OF OPERATION - The present invention relates to a surface compactor and a method of operating a surface compactor. The surface compactor is provided with at least one compacting surface for compacting a substrate an excitation system that generates a substantially square wave vibrational displacement or force that vibrates the least one compacting surface during compaction to increase the compaction rate of the substrate. | 03-06-2014 |
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 |
20140023467 | INTEGRATED PAVING SYSTEM AND METHOD - The present invention relates to a device for transporting paving mix. The device is in the form of a reusable collapsible portable paving mix container. The portable paving mix container includes two end caps and a center section that are telescopically connected whereby the reusable collapsible portable paving mix container may be provided with an extended configuration and a collapsed configuration. | 01-23-2014 |
20140023438 | INTEGRATED PAVING SYSTEM AND METHOD - The present invention relates to machine for distributing and compacting paving mix on a paving surface. The machine includes a mix unloading section, an auger, a screed, a first drive arrangement, and a second drive arrangement. The auger distributes the mix on a paving surface. The screed compacts the mix on a paving surface. The first drive arrangement includes road wheels for self transport at highway speeds. The second drive arrangement includes a track assembly for jobsite transportation during a paving operation. | 01-23-2014 |
20140023436 | INTEGRATED PAVING SYSTEM AND METHOD - The present invention relates to a paving machine that includes an auger, a screed, and one or more sensors. The auger is adapted to distribute a paving mix on a paving surface. The screed is adapted to compact the mix on the paving surface to form the pavement. The one or more sensors are adapted to monitor the density of the pavement as it is compacted by the screed and provide output signals corresponding to the density so that the force exerted by the screed on the pavement as it is formed may be adjusted to achieve a desired pavement density. | 01-23-2014 |
20140022129 | DEVICE FOR FIXING A SATELLITE ANTENNA FOR CONSTRUCTION EQUIPMENT - An apparatus for fixing a satellite antenna for a construction machine is disclosed, which can adjust the height of the satellite antenna that is installed outside a cab to receive a signal of a satellite receiver installed inside the cab when the equipment is transported or operated in a workshop having a low ceiling. The apparatus for fixing a satellite antenna for a construction machine that is mounted outside a cab to receive a signal of a satellite receiver installed inside the cab, includes a bracket composed of a first mount portion mounted on an outer surface of the cab, a second mount portion formed to extend from the first mount portion to be bent, and a third mount portion formed to be bent against the second mount portion; a satellite antenna mounted on the second mount portion to receive a satellite signal; and a hanger fixing a pole, which is laid down to prevent the damage of the satellite antenna due to contact with an obstacle when the equipment is transported or operated, to the third mount portion. | 01-23-2014 |
20140020638 | EXHAUST GAS TEMPERATURE REDUCTION DEVICE FOR AN ENGINE OF CONSTRUCTION EQUIPMENT - Disclosed is a hydraulic circuit for controlling booms of construction equipment, wherein working oil which is relieved from a large chamber of a boom cylinder passes through an orifice so as to prevent the boom from lowering if an overload is applied when the boom is not being operated. The hydraulic circuit for controlling booms of construction equipment includes: a boom cylinder which is connected to a hydraulic pump via a first path and a second path; a boom control valve which is mounted on the path between the hydraulic pump and the boom cylinder; a holding valve which is mounted between the boom control valve and the first path of the boom cylinder and prevents the natural lowering of a boom when the boom control valve is in a neutral position; a port relief valve which is mounted to the first path at the lower side of a holding poppet and relieves working oil when an overload is generated at the first path; and an orifice valve which is mounted at the lower side of the port relief valve, relieves the working oil which passes through the port relief valve when the boom control valve is neutral so as to relieve the working oil through an orifice, and discharges the working oil which passes through the port relief valve to a hydraulic tank at the time of conversion due to boom-up pilot signal pressure which is applied to the boom control valve. | 01-23-2014 |
20140010688 | HYDRAULIC CIRCUIT FOR CONTROLLING BOOMS OF CONSTRUCTION EQUIPMENT - Disclosed is a hydraulic circuit for controlling booms of construction equipment, wherein working oil which is relieved from a large chamber of a boom cylinder passes through an orifice so as to prevent the boom from lowering if an overload is applied when the boom is not being operated. The hydraulic circuit for controlling booms of construction equipment includes: a boom cylinder which is connected to a hydraulic pump via a first path and a second path; a boom control valve which is mounted on the path between the hydraulic pump and the boom cylinder; a holding valve which is mounted between the boom control valve and the first path of the boom cylinder and prevents the natural lowering of a boom when the boom control valve is in a neutral position; a port relief valve which is mounted to the first path at the lower side of a holding poppet and relieves working oil when an overload is generated at the first path; and an orifice valve which is mounted at the lower side of the port relief valve, relieves the working oil which passes through the port relief valve when the boom control valve is neutral so as to relieve the working oil through an orifice, and discharges the working oil which passes through the port relief valve to a hydraulic tank at the time of conversion due to boom-up pilot signal pressure which is applied to the boom control valve. | 01-09-2014 |
20130334999 | ANTI-REBOUNDING CONTROL APPARATUS AND METHOD IN AN ELECTRICAL SWING SYSTEM OF A HYBRID EXCAVATOR - An anti-rebounding control apparatus is provided, which includes an anti-rebounding controller outputting a first command for setting a torque limit value to “0” if an electric motor speed value is equal to or smaller than an upper threshold value and equal to or larger than a lower threshold value in the case where a speed command value of “0” is input and outputting a second command for setting the torque limit value to a maximum value if the electric motor speed value is smaller than the lower threshold value, a torque regulator setting the torque limit value to “0” when the first command is input and setting the torque limit value to the maximum value when the second command is input, and an electric motor inverter intercepting a power that is supplied to an electric motor if the torque limit value is set to “0” and re-supplying the power to the electric motor if the torque limit value is set to the maximum value. Accordingly, the same performance as an anti-rebounding system that is used in a swing system of an existing hydraulic excavator can be implemented even in a system that performs a swing operation using an electric motor such as a hybrid (or electric) excavator. | 12-19-2013 |
20130333367 | HYDRAULIC CIRCUIT FOR PIPE LAYER - Disclosed is a hydraulic circuit for a pipe layer, in which the generation of hydraulic shock in equipment is prevented when an operating device or a moving device is finely operated during combined work in a pipe-laying operation mode. The hydraulic circuit for a pipe layer according to the present invention comprises a main control valve having a straight traveling valve and controls a discharged flow of a hydraulic pump by a negative flow control system, wherein the hydraulic circuit comprises: an unloading valve which linearly controls the closing of a passage of a flow that flows to a hydraulic tank from a center bypass passage of a hydraulic pump when an operating device or a moving device is finely operated during combined work; a pilot valve which is linked with a straight traveling valve, and supplies signal pressure corresponding to an operation signal of the moving device or the operating device to the unloading valve; and an operation mode switch valve which is switched during the combined work, and respectively supplies pilot signal pressure to the straight traveling valve, the pilot valve, and a valve spool which is installed on a downstream side of the center bypass passage of the hydraulic pump. | 12-19-2013 |
20130313053 | ARRANGEMENT FOR SUPPLYING OIL TO A BRAKE - An arrangement is provided for supplying oil to a brake arranged for braking an output shaft of a planetary gear. The arrangement includes a rotatable impeller for supplying oil to the brake and the impeller is arranged to be rotated by an input shaft of the planetary gear. | 11-28-2013 |
20130311054 | SWING CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A swing control system for a hybrid construction machine has a swing operating lever, an electric swing motor, a speed detection sensor which detects the rotary speed of a swing motor, a controller that calculates the driving speed of the swing motor by a swing operating signal created by the operation of the swing operating lever and by a detecting signal of the rotary speed, an inverter which drives the swing motor by a control signal from the controller, a swing inertia detector that detects the swing inertia of equipment and an inertia torque compensator which compares the torque compensation value in accordance with the equipment inertia, and outputs a calculated torque value for controlling the swing motor to the inverter. | 11-21-2013 |
20130303013 | METHOD OF PROVIDING AN ELECTRICAL CONNECTION ARRANGEMENT AND AN ELECTRICAL CONNECTION ARRANGEMENT - A method for providing an electrical connection arrangement between a first member and a second member is provided, as is a corresponding arrangement. The first member is made of electrically conductive material provided with a coating layer, and the electrical connecting arrangement includes a fastening element, the method including providing the first member with a first hole, arranging a sleeve in the first hole of the first member, such that the first member becomes electrically connected with the sleeve, coating an area of the first member including the sleeve, inserting the fastening element into the sleeve and through the first member, and engaging the fastening element with the second member, such that the fastening element becomes abutted against an uncoated surface portion provided on the sleeve to electrically connect the sleeve with the fastening element, and such that the fastening element becomes electrically connected to the second member. | 11-14-2013 |
20130301284 | DEVICE FOR FIXING WARNING LAMP OF A CONSTRUCTION MACHINE - A device for fixing a warning lamp of a construction machine according to the present invention is disposed on a side of a frame of an operating compartment, and includes an upper sleeve, a fixing bracket, a lower sleeve, a supporting lever, an upper elastic member, and a lower elastic member. The supporting lever spaces the upper sleeve apart from the lower sleeve by a certain distance, and rotatably supports the upper sleeve and the lower sleeve. The upper elastic member and the lower elastic member are coupled to both side ends of the supporting lever to elastically support the upper sleeve and the lower sleeve respectively, and are coupled in a multi-joint structure. When the construction machine is on a construction site in wet weather, or is kept on a certain site, the warning lamp can be adjusted to various postures. | 11-14-2013 |
20130298539 | EXHAUST GAS TREATMENT DEVICE FOR CONSTRUCTION MACHINE - An exhaust gas treatment apparatus for a construction machine is provided, which is connected to a diesel particulate filter trap (DPF) to discharge exhaust gas from an engine to outside through the DPF. The exhaust gas treatment apparatus for a construction machine includes a tail pipe main body provided with a plurality of ventilation holes penetratingly formed on the tail pipe main body to allow the outside air to pass through the ventilation holes, and installed on an outlet of the DPF; an exhaust heat dissipation unit provided with a plurality of tubes which respectively communicate with the ventilation holes, and are installed in a horizontal direction of the tail pipe main body; and a plurality of exhaust holes located in a longitudinal direction of the tubes and penetratingly formed in an exhaust gas discharge direction. | 11-14-2013 |
20130292998 | BRAKE CONTROL DEVICE OF WHEEL TYPE CONSTRUCTION MACHINE - Disclosed is a brake device for braking front and rear axles by working oil supplied to front and rear brake cylinders from a hydraulic pump according to the control of a brake pedal. The brake control device of a wheel type construction machine according to the present invention includes: a brake hydraulic pump and a brake pedal; a brake valve, of which a spool is converted according to the control of the brake pedal; a brake device having front and rear brake cylinders, which are driven by working oil supplied at the time of controlling the brake pedal and have different volumes, and front and rear discs to be engaged according to the operation of the front and rear brake cylinders; front and rear axles which are braked by the brake device; and a flow rate control valve mounted on a path between the brake pedal and either the front or rear brake cylinder, whichever has a relatively smaller volume, and distributing and supplying a flow rate to the front and rear brake cylinders according to the control angle of the brake pedal so as to synchronize the front and rear axles at a braking force generating time point. | 11-07-2013 |
20130291634 | LEVEL GAUGE - The present invention relates to a level gauge, and more particularly, to a level gauge provided on a device such as an engine or transmission of a vehicle to discharge aft from the device and prevent a foreign substance from being introduced therein. In addition, the level gauge and an oil net can be integrated into a single module, to thereby save costs. | 11-07-2013 |
20130291530 | BOOM-SWIVEL COMPOUND DRIVE HYDRAULIC CONTROL SYSTEM OF CONSTRUCTION MACHINE - Disclosed is a hydraulic control system for matching the drive speed of a boom up and a swing device according to the operation environment when compound-driving for manipulating boom and swing for excavation compensating error operation. The hydraulic control system of the present invention comprises: an operation mode selection switch for enabling the selection of an operation mode according to the operation environment; an electronic proportional pressure control valve for outputting a control signal pressure that is proportional to the manipulation of the operation mode selection switch when manipulating a boom operation lever for driving the boom up; a variable flow control valve that is placed on a flow channel between a first hydraulic pump and a spool for the swing device, and has an open area thereof that is variably matched proportional to the control signal pressure from the electronic proportional pressure control valve; and a controller having various types of operation modes previously set and stored thereon so as to control the flow being supplied to the spool for the swing device and a spool for the boom merge, according to the operation mode selected when manipulating the operation mode selection switch. | 11-07-2013 |
20130289835 | DRIVE CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - A drive control system for preventing a sudden slowdown of driving speed to reduce the shock felt by a driver, when compound-operating two-way driving and a work device in an excavator. | 10-31-2013 |
20130277582 | HOLDING VALVE FOR CONSTRUCTION EQUIPMENT - The present invention relates to a holding valve that is used for a hydraulic circuit for controlling a working device actuator of construction equipment, and to a holding valve for construction equipment in which a double nut and a sleeve are removed such that an assembling efficiency is improved and the cost is reduced, and further, the abnormal assembling of a piston can be prevented. | 10-24-2013 |
20130276441 | HYDRAULIC PUMP FOR CONSTRUCTION MACHINERY - Disclosed is a hydraulic pump for construction machinery for controlling to inhibit one-way driving when compound-operating two-way driving and work devices, such as a boom, to enhance operation efficiency. The hydraulic system for the construction machinery of the present invention provides the hydraulic system comprising: an operation device for driving and an operation lever for the work devices; a left driving motor which connects to a first hydraulic pump; a first control valve which is installed on the discharge flow path of the first hydraulic pump; a right driving motor which is connected to a second hydraulic pump; a hydraulic actuator which is connected to the first hydraulic pump and the second hydraulic pump; a second control valve which is installed on the discharge flow path of the first hydraulic pump or the second hydraulic pump; a third control valve which is installed on a flow path that branches from the discharge flow path of the second flow path; a first bypass valve which is connected to the upstream portion of the discharge flow path of the first hydraulic pump; a second bypass valve which is connected to the upstream portion of the discharge flow path of the second hydraulic pump; a confluence valve which is installed on a flow path which connects in parallel the discharge paths of the first and second hydraulic pumps; and a controller for controlling the opening of the first and second bypass valves and the confluence valve according to an operation signal that is input from the operation device for driving and the operation lever for the work device. | 10-24-2013 |
20130271380 | DISPLAY INTEGRATED CONTROL SYSTEMS AND DISPLAY INTEGRATED INPUT DEVICE - An integrated display control system is provided, which includes a plurality of display devices, and an integrated display input device selecting one of the display devices to be operated through device identification codes that respectively correspond to specific key signals input in accordance with user's key operation and controlling the operation (or function) of the selected display device through common control commands that respectively correspond to the user input key signals. Since the plurality of display devices can be individually and integratedly controlled using one input device, the manufacturing cost can be saved, and the space of an operator's seat can be secured. | 10-17-2013 |
20130269332 | ENERGY RECYCLING SYSTEM FOR A CONSTRUCTION APPARATUS - An energy recycling system is disclosed. When a construction apparatus performs a combined operation of a boom down operation and an arm out operation, hydraulic energy returned in the boom down operation is recycled for the arm out operation by the energy recycling system. An energy recycling system for a construction apparatus according to the present invention includes: a first hydraulic pump; a second hydraulic pump; an arm cylinder including a low-pressure chamber connected to the first hydraulic pump through an arm out supply passage; an arm out return passage connecting a high pressure chamber of the arm cylinder to a hydraulic tank; a boom cylinder including a low-pressure chamber connected to the second hydraulic pump through a boom down supply passage; a boom down return passage connecting a high pressure chamber of the boom cylinder to a hydraulic tank; a joining and recycling passage connecting the boom down return passage and the arm out supply passage to each other in parallel; a recycling passage connecting the boom down return passage and the boom down supply passage to each other in parallel; and a plurality of detecting means that detect pressure of the arm cylinder and pressure of the boom cylinder, respectively, to determine whether a hydraulic fluid, returned from the boom cylinder in a combined operation of a boom down operation and an arm out operation, is recycled. | 10-17-2013 |
20130268166 | ENGINE IDLING CONTROL DEVICE OF EXCAVATOR AND METHOD THEREOF - An engine idling control device for an excavator and a method thereof are provided, which can recognize the state of an engine, an on/off state of a function selection switch, and a user's intention to work that has maximally been reflected, reduce fuel use and production of carbon dioxide through automatic stopping or driving of the engine in accordance with an operation state of a safety device having convenience, and easily implement an engine stop and start function in accordance with a user's selection. The engine idling control device includes a first signal detection unit, a second signal detection unit, and an engine idling control unit automatically stopping or driving an engine in accordance with the state of the engine, the on/off state of the function selection switch detected by the first signal detection unit, and the operation state of the safety device detected by the second signal detection unit. | 10-10-2013 |
20130265686 | DEVICE AND METHOD FOR CONTROLLING POWER ACCORDING TO A LOAD OF A HYBRID EXCAVATOR - A power control apparatus and method according to a load of a hybrid excavator including an H-ECU is disclosed. If a difference between an actual power value actually used in a load (SW PEC and ISAM PEC) or in an ESS and a power value required for an actual use in the load is equal to or larger than a set error value, a power that is supplied from the ESS to the PECs and a power that is supplied between the PECs are controlled to be cut off, and thus high voltage is prevented from being continuously supplied to circuits to thereby prevent secondary problems (e.g., fire, trouble of equipment, and the like) from occurring due to the high voltage. | 10-10-2013 |
20130264077 | BATTERY COVER PROVIDED WITH FIRE EXTINGUISHING FUNCTION - A battery cover with a fire-extinguishing function is provided, which includes a fire-extinguishing tank disposed on an inner surface of the battery cover to store compressed air and fire-extinguishing fluid, so that the fire-extinguishing tank bursts and the fire-extinguishing fluid contained in the tank is sprayed to the battery to thereby suppress a fire in the case where the fire breaks out inside the battery due to overheat or electric leak of the battery. The battery cover with a fire-extinguishing function is coupled to an opening portion of a case that accommodates the battery therein to protect terminals of the battery in a battery pack, and includes the fire-extinguishing tank disposed on an inner surface of the battery cover to store the fire-extinguishing fluid therein. | 10-10-2013 |
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 |
20130256468 | DEVICE FOR FIXING HYDRAULIC PIPE OF BOOM SWING TYPE EXCAVATOR - A device for fixing a hydraulic pipe of a boom swing type excavator includes a swing support, which is connected to the front end of an upper swing body so as to swing, a working device, which is rotatably fixed to the swing support, a first hydraulic pipe supporting hole formed in a top plate of the upper swing member so that a hydraulic pipe passes therethrough from the control valve in the upper swing member, and a second hydraulic pipe supporting hole formed in a top plate of the swing support at a position corresponding to the first hydraulic pipe supporting hole, limiting the shaking of the hydraulic pipe in the right and left directions when the working device swings, and guiding displacement in the vertical direction. | 10-03-2013 |
20130245899 | SWING CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A swing control system for a hybrid construction machine includes a swing operation lever, a hydraulic pump, an electric swing motor that makes an upper swing structure swing against a lower driving structure in accordance with an electric control signal corresponding to an operation amount of the swing operation lever, a swing parking brake released in accordance with an operation signal of the swing operation lever to drive the swing motor, a control valve which drives a hydraulic cylinder for the swing parking brake by hydraulic fluid from the hydraulic pump to release the swing parking brake if the control valve is shifted by an input of the operation signal from the swing operation lever, and a controller that controls the swing parking brake through shifting of the control valve or controls driving of the swing motor in accordance with the operation signal from the swing operation lever. | 09-19-2013 |
20130241251 | CONSTRUCTION EQUIPMENT MACHINE WITH IMPROVED CONTROLLER ERGONOMICS - A construction equipment machine includes an operator station equipped with a driver seat which is rotatable around a vertical axis at least from a first operating position to a second operating position through an intermediate position, wherein the machine includes at least a first hand controller which the operator may use at least for some operations and at least in one position of the seat for operating a hydraulic implement. When the seat moves between the first position up to at least the intermediate position, the first hand controller is in a first configuration with respect the seat so as to be in a manipulatable position with respect to the seat, and, when the seat is in its second position, the controller is shifted to a second configuration where it is displaced to a non manipulatable position with respect to the seat. | 09-19-2013 |
20130239560 | HYDRAULIC PUMP CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - Disclosed is a hydraulic pump control system for minimising flow loss by optimally limiting the discharge flow volume of the hydraulic pump when an upper swivel body is made to swivel abruptly. The hydraulic pump control system according to the present invention comprises: a swivel motor which is connected to a hydraulic pump; a control spool for the swivel motor, which controls the hydraulic fluid supplied to the swivel motor during switch back by means of a control signal for a remote control valve; an orifice which is provided on the furthest downstream side of a centre bypass pathway; a regulator which controls the angle of inclination of the swash plate of the hydraulic pump; a swivel operation signal detection means which detects a swivel operation signal output from the remote control valve; an electronic proportional pressure reducing valve which outputs a secondary pressure proportional to the detection signal of the swivel operation signal detection means; and a shuttle valve of which the input sides are respectively coupled to the orifice and the electronic proportional pressure reducing valve, and the output side is coupled to the regulator. | 09-19-2013 |
20130238228 | CODE LOCK SYSTEM FOR PREVENTING THEFT AND METHOD THEREOF - An anti-theft code lock control system including an engine state determination unit, an off time determination unit, a code input unit, a code matching determination unit, and an engine control unit, and a method thereof are provided, which can solve problems of a system in the prior art that determines an equipment off state only by a key signal and thus does not operate a code lock system in the case where a key is in an on state but an engine is in the same state as an engine off state. | 09-12-2013 |
20130234507 | TURNING JOINT FOR ELECTRIC EXCAVATOR - The present invention relates to a turning joint for an electric excavator, which includes a direct current/alternating current convertor, an upper coil, a lower coil, and an inverter. A turning joint for an electric excavator (or a hybrid excavator) uses the principle of a transformer to transmit electric energy from the upper portion of the excavator to a travelling body in the lower portion thereof. Thus, even while an upper rotator body of an electric excavator performs a rotating operation, electric power can be supplied to a travelling electric motor in the lower portion of the electric excavator, to thereby perform a travelling operation. | 09-12-2013 |
20130228245 | FLOW CONTROL VALVE FOR CONSTRUCTION MACHINE - A flow control valve for a construction machine is provided, which can constantly control a flow rate of hydraulic fluid supplied to a hydraulic actuator through a flow control spool in a spool. The flow control valve for a construction machine, having a valve body in which a supply passage communicating with a pump passage and actuator ports connected to a hydraulic actuator are formed, and a spool installed in the valve body to be shifted, includes a flow control spool shifted in the spool to variably control a cross-sectional area of a passage connected to the one actuator port if a flow rate of the hydraulic fluid that flows through the supply passage is higher than a set flow rate, a first passage formed on the spool to communicate with the supply passage and a second passage formed on the spool to communication with the one actuator port and having a cross-sectional area that is varied depending on the shifting of the flow control spool. | 09-05-2013 |
20130228070 | HYDRAULIC CYLINDER WITH VARIABLE CUSHION ORIFICE - A hydraulic cylinder having a variable cushion orifice is provided, which can simply adjust the size of a cushion orifice hole, which is provided to mitigate impact generated at a stroke end of a cylinder rod, from the outside of the hydraulic cylinder. The hydraulic cylinder having a variable cushion orifice includes a first cushion orifice formed on a head cover, a second cushion orifice communicating with the first cushion orifice and having an inlet formed on an outer side surface of the head cover, a third cushion orifice making the second cushion orifice communicate with a hydraulic flow path formed on the head cover, and a plug for a variable orifice replaceably engaged with the second cushion orifice and having an orifice formed to adjust an amount of hydraulic fluid discharged to the hydraulic flow path through the first cushion orifice at the stroke end of the cylinder rod. | 09-05-2013 |
20130221703 | CONSTRUCTION MACHINE CAB HAVING A ROLLOVER PROTECTION STRUCTURE - A cab having a rollover protection structure for a construction machine is provided, which includes a front right pole positioned on the front right side of the cab and formed to extend upwardly from a bottom frame, a front left pole positioned on the front left side of the cab and formed to be spaced apart from the front right pole, a front upper end lateral pole connecting upper ends of the front right pole and the front left pole to each other, a first reinforcement member installed on an upper portion of the front right pole, and a second reinforcement member installed on a lower portion of the front left pole. | 08-29-2013 |
20130213031 | HYDRAULIC SYSTEM FOR A CONSTRUCTION MACHINE - Disclosed is a hydraulic system for a construction machine, which makes it possible to adjust the geometric position of a working device comprising a boom and an arm by means of a single manipulation lever, thereby enabling a leveling/flattening process to be conveniently performed. The hydraulic system includes: a working mode selection switch for selecting a leveling/flattening process; a boom driving switch valve for controlling the driving of a boom cylinder in response to a control signal from a first manipulation lever; an arm driving switch valve for controlling the driving of an arm cylinder in response to a control signal from a second manipulation lever; a shuttle valve including input parts that connect to both an electronic proportional control valve and to the first manipulation lever, respectively, and an output part connecting to the boom driving switch valve; and an electronic controller. | 08-22-2013 |
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 |
20130160439 | FLOW RATE CONTROL DEVICE FOR VARIABLE DISPLACEMENT TYPE HYDRAULIC PUMP FOR CONSTRUCTION EQUIPMENT - The present invention pertains to a hydraulic pressure control device of a variable displacement type hydraulic pump for construction equipment, wherein operable sections of operation systems are formed in a wide manner while the hydraulic pump discharges a relatively small flow rate compared with the operation amount of the respective operation systems in the case of complex operations, so as to improve the pressure loss and the fuel ratio of the hydraulic pump. The device includes a flow rate controller, which is preferably connected to an operation amount detecting means and a swash plate control device, and receives operation signals from the operation system of a control device that are detected by the operation amount detecting means so as to control the discharge flow rate of the hydraulic pump. In the case of the complex operations, the flow rate controller pre-determines the required flow rate of an actuator for the respective operation systems via the operation signals of the operation systems and subsequently operates the square root of the sum of the squares of the respective required flow rates so as to determine the discharge flow rate of the hydraulic pump, thereby controlling the swash plate control device. | 06-27-2013 |
20130146163 | DEVICE FOR CONTROLLING CONSTRUCTION EQUIPMENT - Provided is a device for controlling construction equipment for controlling the spool of an MCV, which is directionally controllable, to control working fluid which is supplied to a hydraulic actuator. According to the present invention, provided is a device for controlling construction equipment, comprising: a remote control valve for outputting a secondary signal pressure which is proportionate to the amount calibrated by an operator; a calibrated amount detection means for detecting the secondary signal pressure of the remote control valve; an electro proportional pressure reducing valve for outputting the secondary signal pressure; first and second shuttle valves, each of the shuttle valves having an input portion on one side which connects to the secondary signal pressure of the remote control valve, and an input portion on the other side to which output-side ports of the electro proportional pressure reducing valve connect respectively; a directional control spool for controlling the actuation of the hydraulic actuator when exchanging by means of the signal pressure output from the first and second shuttle valves; and a controller for outputting a control signal to the electro proportional pressure reducing valve so as to correspond to the operation amount which is input by the operation amount detection means. | 06-13-2013 |
20130144506 | ENGINE PROTECTING APPARATUS FOR PREVENTING THE INFLOW OF MOISTURE - The present invention relates to an engine protecting apparatus for preventing the inflow of moisture, which drops the RPM (revolutions per minute) of an engine by generating an RPM drop request signal when moisture drain does not occur, wherein a time is counted from the point when a moisture detection signal is received from a WIF sensor installed in a moisture separator, and moisture drain is checked at the point when a counted cumulative time exceeds a set time. When moisture drain is not performed even after a signal for moisture drain is received from a moisture detecting sensor installed in the moisture separator, a driver is aware of the seriousness of moisture separation to thus separate moisture in the moisture separator as soon as possible. This prevents fatal damages which may be aroused in an injector or fuel system due to the introduction of moisture into an engine. | 06-06-2013 |
20130137543 | CONTINUOUSLY VARIABLE TRANSMISSION AND A WORKING MACHINE - A continuously variable transmission has an input shaft and an output shaft. The transmission includes a variator unit having an input shaft and an output shaft, and a planetary gear wheel unit having a planet carrier, a first sun wheel and a second sun wheel. The input shaft of the transmission is rotationally connectable to the planet carrier and to the input shaft of the variator unit, and a shaft rotationally fixed to the first sun wheel is rotationally connectable to the output shaft of the variator unit. The planet carrier is provided with a first inner set of planet wheels for meshing engagement with the first sun wheel and a second outer set of planet wheels for meshing engagement with the second sun wheel. The first and second sets of planet wheels are in meshing engagement with each other, and a shaft rotationally fixed to the second sun wheel is rotationally connectable to the output shaft of the transmission via a first output member for obtaining a powersplit mode in Which power is transmitted via the second sun wheel. | 05-30-2013 |
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 |
20130125483 | APPARATUS FOR FIXING THE REAR GLASS OF AN OPERATOR CAB ON CONSTRUCTION MACHINERY - An apparatus for fixing the rear glass of a cab on construction machinery is provided. The apparatus includes a window frame forming a cab window frame; a weather strip coupled to the window frame to seal a gap between the window frame and the rear glass of the cab; a glass interior fixing portion including an engagement portion inserted and engaged between the window frame and the weather strip, a body portion extending from the engagement portion at right angles and having a groove and a glass support portion supporting the rear glass of the cab; a glass exterior fixing portion engaged with the glass support portion of the glass interior fixing portion to support the rear glass of the cab; and a stopper having one side fixed to the window frame to support the rear glass of the cab. | 05-23-2013 |
20130123055 | CONTINUOUSLY VARIABLE TRANSMISSION AND A WORKING MACHINE INCLUDING A CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission includes a variator unit having a variator input shaft and a variator output shaft, and first, second and third planetary gear sets. The first and second planetary gear sets are arranged together and each includes a first member operatively connected to a common transmission input shaft and a second member operatively connected to a common output shaft, each of the first and second planetary gear sets further including a third member. The third planetary gear set has a first, second and third member. The variator input shaft is operatively connected to the third member of the second planetary gear set and the variator output shaft is operatively connected to the third member of the first planetary gear set. The first member of the third planetary gear set is operatively connected to the variator output shaft. The second member of the third planetary gear set is selectively connectable to the third member of the second planetary gear set and selectively connectable to the transmission housing. The third member of the third planetary gear set is operatively connected to a transmission output shaft. The common output shaft is selectively connectable to the transmission output shaft. | 05-16-2013 |
20130121852 | SYSTEM FOR CONTROLLING HYDRAULIC PUMP IN CONSTRUCTION MACHINE - Disclosed is a system for controlling a hydraulic pump in a construction machine which can reduce the discharge flow of the hydraulic pump in proportion to the load pressure of the hydraulic pump to enhance operability by the driver. The present invention provides the system for controlling the hydraulic pump in the construction machine, which is characterized by detecting the discharge pressure of the hydraulic pump and the operation activity of an operation lever, and comparing the detected discharge pressure of the hydraulic pump and a predetermined pressure value, and when the detected discharge pressure exceeds the predetermined pressure value, the maximum dischargeable flow of the hydraulic pump is reduced in proportion to the difference between the detected pressure and the predetermined pressure value. | 05-16-2013 |
20130119784 | EMERGENCY STOP SYSTEM FOR A HYBRID EXCAVATOR - An emergency stop system for a hybrid excavator is provided, which includes an emergency switch and an emergency stop unit. In a normal operation state, a power supply that is applied from a power supply unit is provided to a hybrid controller and an engine controller, while when the emergency switch is pressed, the input power supply is intercepted to effectively stop the operation of the hybrid system in the case where equipment abnormality or an emergency situation occurs. Also, when the emergency switch is pressed, the power supply is applied to an emergency alarm unit and an energy discharge unit to notify an operator and neighboring persons of the equipment abnormality and emergency situation occurrence, and a hybrid power source vanishes completely. | 05-16-2013 |
20130116897 | SWING CONTROL APPARATUS AND METHOD OF CONSTRUCTION MACHINERY - A swing control apparatus and a swing control method for a construction machine are provided. The swing control apparatus includes a start position estimation unit, a stop target position calculation unit, and a swing motor position control unit. Even if an operator releases a lever or commands a stop at different times, an upper swing structure of the construction machine (for example, excavator) can be stopped within a predetermined range, and thus the inconvenience caused by an additional driving operation, which is required as the stop position differs according to the time point where the stop command starts, can be solved. | 05-09-2013 |
20130112291 | VALVE FOR CONTROLLING PRESSURE - A pressure control valve is provided, which includes a stopper having a flow path for preventing damping that is provided in a contact portion that is adjacent to an inner flow path of a main piston so that hydraulic fluid in the main piston is smoothly drained through a gap between stopper contact surfaces. | 05-09-2013 |
20130103272 | HORSEPOWER CONTROL SYSTEM OF A HYBRID EXCAVATOR AND CONTROL METHOD THEREFOR - Disclosed are a horsepower control system for a hybrid excavator and a control method thereof which controls the driving of a generator driver or a swing motor driver with a swing power ratio of 1 and a hydraulic power ratio of 1 in a first operation mode, and with a swing power ratio of r (a user set value) and a hydraulic power ratio of 1−r in a second operation mode. When the power required by the user is fully used, energy from an energy storage is used to maximize work capacity. When the total horsepower used is limited to the range of horsepower available, the limited use of the driving device is at a level of horsepower similar to that of a typical system, thereby minimizing fuel consumption. | 04-25-2013 |
20130103270 | FLOW CONTROL SYSTEM FOR A HYDRAULIC PUMP OF CONSTRUCTION MACHINERY - A flow control system of a hydraulic pump for a construction machine is provided, which can variably control a discharge flow rate of the hydraulic pump in accordance with load pressure generated by a hydraulic actuator such as a boom cylinder. According to the flow control system of a hydraulic pump, the discharge pressure of the hydraulic pump and the operation rate of the operation lever for the hydraulic actuators is detected, and standard load pressures of the respective hydraulic actuators are set. If the discharge pressure of the hydraulic pump is higher than the preset standard load pressures of the hydraulic actuators, the discharge flow rate of the hydraulic pump is proportionally reduced for the same operation rate in accordance with degrees of loads generated by the hydraulic actuators, while if the discharge pressure of the hydraulic pump is lower than the standard load pressures of the hydraulic actuators, the discharge flow rate of the hydraulic pump is controlled in proportion to the operation rate. | 04-25-2013 |
20130099079 | CLIP FOR CONSTRUCTION MACHINERY, HAVING A LATCH THAT MOVES IN MULTIPLE DIRECTIONS - A clip for a construction machine is provided, which prevents the damage of a fastening structure of a connector and facilitates the release of the connector when the connector is fastened to the clip using a connector fastening structure having the same shape in upper, lower, left, and right directions and a moving latch provided in the clip, in the case where the connector that is included in various kinds of wires and signal cables is mounted using the clip that is fixed to a structure of a vehicle of the construction machine. In addition, the clip has a structure whereby two connectors can be simultaneously fastened to one click using the fastening structure having the same shape, and the connector can be fixed to the clip in a desired direction without twisting of the wires using the fastening structure having the same shape in left and right directions. | 04-25-2013 |
20130098022 | CONTROL DEVICE FOR A HYDRAULIC PUMP OF CONSTRUCTION MACHINERY - A negative control type hydraulic pump control device mounted on a construction machine such as an excavator is provided. The hydraulic pump control device includes an accumulator storing a control signal pressure, a solenoid valve supplying any one of the signal pressure from the accumulator and a negative signal pressure to the regulator when a solenoid valve is shifted in accordance with applying of the control signal, and an operation lever locking unit turning ON/OFF the control signal applied to the solenoid valve in accordance with a driver's operation, wherein an inclination angle of a swash plate of a hydraulic pump is maintained with a minimum capacity by compensating for the negative signal pressure caused by hydraulic fluid supplied from the accumulator through shifting of the solenoid valve when an engine starts. | 04-25-2013 |
20130098021 | HYDRAULIC PUMP CONTROL SYSTEM FOR CONSTRUCTION MACHINERY - A hydraulic pump control system provided in a construction machine such as an excavator is provided. According to the hydraulic pump control system, a loss of a flow rate is reduced by initially supplying hydraulic fluid as much as necessary from a hydraulic pump to a hydraulic motor in order to accelerate a swing movement of an upper frame against a lower traveling structure or to make an upper swing structure swing. | 04-25-2013 |
20130090771 | CONTROL SYSTEM FOR A HYBRID EXCAVATOR - The present invention relates to a control system for a hybrid excavator including an engine, a hydraulic pump driven by the engine to drive a hydraulic actuator by hydraulic fluid, a generator driven by the engine to generate electric energy, and an energy storage device charging the electric energy generated by the generator and supplying the electric energy to an electric actuator, the control system comprising: a required torque detection means for detecting a torque that is required to drive the hydraulic pump; a charge amount detection means for detecting a charge rate (or charge amount) of the electric energy storage device; a memory storing a generation degree (or generation amount) in accordance with the torque and the charge rate (or charge amount); and a hybrid control means for controlling the generator in accordance with the torque value detected by the required torque detection means and the generation amount in a memory means that corresponds to the charge rate value (or charge amount) detected by the charge amount detection means. According to the control system, the fuel efficiency is optimized by driving the electric generator attached to the engine based on the required torque of the hydraulic pump and the preset generation amount value corresponding to the SOC (State Of Charge). | 04-11-2013 |
20130063893 | ENERGY REPOSITORY DISCHARGE SYSTEM FOR CONSTRUCTION MACHINERY - A discharge system of a stored energy for a construction machine is provided, which includes the energy storage, an electric discharge device discharging energy stored in the energy storage, and an energy cooling portion increasing the heat dissipation capacity of the electric discharge device by cooling heat generated in the electric discharge device for a time when the energy stored in the energy storage is discharged to the electric discharge device. Since the heat generated in the electric discharge device is cooled by a cooling device while the energy stored in the energy storage is discharged to the electric discharge device, the heat dissipation capacity of the electric discharge device is increased to shorten the discharge time. Also, the operation period of the cooling device is controlled in proportion to the residual voltage of the energy storage, and thus the cooling efficiency is maximized. | 03-14-2013 |
20130061424 | WATERPROOF GROMMET FOR A CAB ROOF OF CONSTRUCTION MACHINERY - A waterproof grommet mounted on a cab of a construction machine is provided, which includes a main body having a cable connection path formed therein and being bent to prevent an inflow of rainwater into the cab, a support plate inserted into and engaged with one side of the cab to support the main body, and a reinforcement rib formed at an end portion of an outer surface of the main body. | 03-14-2013 |
20130055886 | DOUBLE CHECK VALVE FOR CONSTRUCTION EQUIPMENT - An improved double check valve for a construction machine is provided, which can greatly reduce noise and hunting phenomenon by making check valves open and close within a predetermined time difference to correspond to pressure drops that occur due to an external load when a dozer blade working device is operated. The double check valve includes a hydraulic pump; a hydraulic cylinder connected to the hydraulic pump to drive a working device; a control valve installed in a flow path between the hydraulic pump and the hydraulic cylinder and shifted to control a start, a stop, and a direction change of the hydraulic cylinder; a pair of pistons installed on one side of a piston cylinder to open and close first flow paths and second flow paths provided between the control valve and the hydraulic cylinder, provided with plunger ground portions and notch portions, respectively, and dividedly formed to be shifted in opposite directions to each other when signal pressure that is introduced from any one of the first and second flow paths acts on check hydraulic pressure portions during temporary descending of the working device; a pair of check valves of which checking functions are released when the check valves are pressed through the shifting of the pistons; and a plunger installed inside the piston cylinder to move the pistons in a checking function release direction of the check valves while a flow rate of hydraulic fluid, having passed through the notch portions, forms pressure in the plunger ground portions of the pistons. | 03-07-2013 |
20130048826 | FIXING DEVICE OF HYDRAULIC PIPE OF CONSTRUCTION MACHINE - Disclosed therein is an apparatus for fixing hydraulic pipes for a construction machine having a hydraulic pipe clamp fixing a plurality of pipes to a boom structure, including: a lower clamp ( | 02-28-2013 |
20130032233 | HYDRAULIC PRESSURE-REGULATING VALVE FOR CONSTRUCTION EQUIPMENT - hydraulic control valve for a construction machine is provided. The hydraulic control valve includes a boom spool slidingly coupled into a valve block to be shifted to control the hydraulic fluid supplied from a first hydraulic pump and a second hydraulic pump to the actuator and provided with an internal path, a supply path of the first hydraulic pump and a supply path of the second hydraulic pump which are formed to be vertically symmetrical about the boom spool, check valves elastically supported to open and close the supply path of the first hydraulic pump and the supply path of the second hydraulic pump, respectively, bridge paths formed to be horizontally and vertically symmetrical with respect to a path formed on a sliding surface of the valve block to supply the hydraulic fluid, cylinder paths supplying the hydraulic fluid from the first hydraulic pump to the actuator. | 02-07-2013 |
20130032225 | PRESSURE CONTROL VALVE - A pressure control valve is provided. The pressure control valve includes a sleeve having an inlet port receiving hydraulic fluid and a low-pressure path communicating with a hydraulic tank, a main poppet opening and closing the low-pressure path with respect to the inlet port, a main poppet spring elastically biasing the main poppet in an initial state by pressing the main poppet, a pilot poppet having an orifice flow path to control pressure in the pressure chamber while maintaining a sliding state against a valve seat when pressure that exceeds a predetermined pressure is generated in the pressure chamber to open an internal flow path of the valve seat, and a pilot poppet spring elastically biasing the pilot poppet in an initial state by pressing the pilot poppet to maintain the internal flow path of the valve seat closed. | 02-07-2013 |
20130025720 | HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY - A hydraulic control valve for a construction machine is disclosed, which can variably control the flow of hydraulic fluid that is supplied to a hydraulic cylinder to drive a working device. The hydraulic control valve for a construction machine includes a valve block in which an inlet port and an outlet port that communicates with the inlet port is formed, a check valve provided with a first throttling portion to permit the flow of the hydraulic fluid from the inlet port to the outlet port and to variably control the flow of the hydraulic fluid from the outlet port to the inlet port, and a spool provided with a second throttling portion to variably control the flow of the hydraulic fluid from the outlet port to the inlet port through the check valve that is opened when the second throttling portion is shifted by pilot signal pressure. | 01-31-2013 |
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 |
20120292918 | ELECTRIC OPERATING SYSTEM FOR OPERATING AT LEAST ONE ELECTRIC EQUIPMENT FOR A WORK MACHINE AND WORK MACHINE COMPRISING AN ELECTRIC OPERATING SYSTEM - An electric operating system for operating at least one electric equipment article for a work machine is provided. This electric operating system includes a flywheel generator for generating electric power needed for the operation of the at least one electric equipment article. Further, the system includes a power electronic device connected to the output of the flywheel generator for adapting a voltage level provided by the flywheel generator to a voltage level required for the operation of the at least one electric equipment article. Finally, the system includes a connector device adapted for to be connectable to the power electronic device and the at least one electric equipment article when the at least one electric equipment article is attached to, or arranged at, the work machine for providing the at least one electric equipment article with electric power at the adapted voltage level. | 11-22-2012 |
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 |
20120221218 | METHOD OF CONTROLLING AN INTERNAL COMBUSTION ENGINE AND A CONTROL UNIT FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - A method of and a control unit arranged for controlling an internal combustion engine connected to a torque converter arranged to operate in a torque converter mode or a lock up mode are provided. The method includes determining whether the torque converter mode or the lock up mode is presently in operation and selecting to control an engine speed (N) in dependence of an operator input when the torque converter mode is present, and selecting to control an engine output power and/or engine output torque in dependence of operator input to the accelerator unit when the lock up mode is present. | 08-30-2012 |
20120138090 | SCREEN WIPER ARRANGEMENT AND METHOD FOR OPERATING A SCREEN WIPER ARRANGEMENT - A screen wiper arrangement is provided including a window screen and a screen wiper for cleaning the window screen, wherein the window screen is arranged in an opening of a cabin and inserted in a window frame, and wherein the window screen includes at least one screen portion which can be moved between an open and a closed position. The window screen includes an electrically conductive element coupleable to an electrical circuit which has at least a first state in response to a first position of the at least one screen portion and a second state in response to a second position of the at least one screen portion. One or more contact points are available for detecting if the electrical circuit is in the first or the second state, and a wiper control element is provided which controls the activation of the screen wiper system. | 06-07-2012 |
20120133157 | DOOR LOCKING ARRANGEMENT AND WORK MACHINE COMPRISING A DOOR LOCKING ARRANGEMENT - A door locking arrangement is provided for a door of a work machine for holding the door in an open position, wherein the door is pivotably connected to a cab wall. The door locking arrangement includes a first holding element and a second holding element forming a releasable connection for holding the door in its open position, wherein one of the two holding elements is arranged at an outside of the door facing the cab wall when the door is in its open position and the other holding element is arranged at the cab wall. An electric actuator is provided for releasing the releasable connection by separating the first holding element from the second holding element when the door is to be moved from its open position to its closed position. | 05-31-2012 |
20120109459 | HYDRAULIC STEERING SYSTEM COMPRISING A FIRST AND A SECOND STEERING MEMBER AND VEHICLE COMPRISING A HYDRAULIC STEERING SYSTEM - A hydraulic steering system for a vehicle includes a first steering member and a second steering member, wherein the first steering member is operationally connected to a first steering valve unit including a first steering valve, and wherein a priority valve controls a flow of a hydraulic fluid to one or more steering cylinders which provide for steering of the vehicle in a desired steering direction, wherein the priority valve gives priority to steering with the first steering member over the steeling with the second steering member. A second steering valve is provided functionally operable in series with a proportional flow control valve, wherein the second steering valve and/or the proportional flow control valve are controlled at least by the second steering member. | 05-03-2012 |
20120100956 | WORKING MACHINE AND A METHOD FOR OPERATING A WORKING MACHINE - A working machine includes a prime mover for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the prime mover and the driving wheels for transmitting torque from the prime mover to the driving wheels. The transmission line includes a gearbox arranged between the prime mover and the wheels, and the working machine further includes at least one hydraulic machine in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine, and an electric machine for driving or braking the driving wheels and/or for driving or braking the at least one hydraulic machine. The electric machine is arranged in parallel with the prime mover with respect to the transmission line and is mechanically connected to the transmission line between the prime mover and the gearbox. The gearbox is a continuously variable transmission having a variator unit, and the gearbox has an operation mode where the rotation speed of the output shaft of the gearbox is zero or close to zero independently of the rotation speed of the input shaft of the gearbox at the same time as torque can be transmitted from the input shaft to the output shaft. | 04-26-2012 |
20120067432 | HYDRAULIC SYSTEM AND A WORKING MACHINE COMPRISING SUCH A HYDRAULIC SYSTEM - A hydraulic system for a working machine includes at least one work function and a control valve unit for controlling hydraulic fluid to and from the work function, and a recovery unit connected to a return port of the control valve unit for recovering energy from the work function. The system further includes an arrangement for limiting the pressure of the hydraulic fluid at the return port, which pressure limiting arrangement has a pilot-operated valve adapted to set a maximum allowable pressure at the return port of the control valve unit. The pressure is variable by controlling the pilot-operated valve by a control unit. | 03-22-2012 |
20120065840 | VEHICLE AND METHOD FOR OPERATING A VEHICLE - A vehicle includes at least one of (i) an undercarriage and an upper carriage arranged rotatably about a vertical axis with respect to the undercarriage and (ii) a leverage means arranged pivotably about a horizontal axis with respect to the upper carriage, wherein a sensor system is provided for monitoring at least one stability criterion with respect of a tilt movement of the vehicle, and wherein a control unit is coupled to the sensor system for automatically initiating an action and/or performing an action for stabilizing the vehicle depending on the at least one stability criterion. The risk of an unexpected tilting of the vehicle can be reduced | 03-15-2012 |
20110314802 | SWING SYSTEM AND CONSTRUCTION MACHINERY OR VEHICLE COMPRISING A SWING SYSTEM - A swing system for construction machinery or a vehicle, particularly an excavator or a crane, includes a swing brake for blocking or unblocking a rotational movement of a first portion of the vehicle relative to a chassis portion of the vehicle, and a swing pump and a swing motor are provided for performing the rotational movement. The swing pump can be positioned in a neutral position where no rotational movement of the first portion takes place. At least one brake control actuator is provided for automatically engaging the brake when the swing pump is in its neutral position. The swing system can provide an improved control of the swing movement on a slope and an improved comfort during operation of the swing movement. | 12-29-2011 |
20110300992 | METHOD FOR OPERATING A BRAKE SYSTEM OF A WORK MACHINE AND BRAKE SYSTEM FOR A WORK MACHINE - A method for operating a brake system for a work machine that includes at least one operating brake acting directly or indirectly on at least one ground engagement element of the work machine and at least one operating brake actuator which is movable between a fully engaged position and a fully released position and an accelerator actuator for activating propulsion of the work machine. In an activated state of the brake system the operating brake actuator is moved automatically to its fully engaged position when the accelerator actuator is released. | 12-08-2011 |
20110218075 | PEDAL MAP SHIFT - A method is provided for controlling a prime mover adapted to drive at least one ground engaging element of a working machine. The method includes receiving an operator control input indicative of the control of the prime mover and determining at least one operation signal in response to the operator control input, which operation signal is sent for controlling the prime mover. The method also includes receiving a operating state input indicative of an operating state of the machine and selecting a control mode from at least one speed control mode in which the determined operational signal comprises a desired speed of the prime mover and at least one torque control mode in which the determined operational signal comprises a desired torque of the prime mover in response to the operating state input. | 09-08-2011 |
20110182665 | CONVEYOR ASSEMBLY FOR AN ASPHALT PAVING MACHINE - Conveyor assemblies for an asphalt paving machine and an asphalt paving machine. The conveyor assembly may include a first conveyor, a second conveyor generally parallel to the first conveyor, a central space being defined between the first conveyor and the second conveyor, and a cover assembly. The cover assembly may include a cover member positioned over the central space and covering the conveyor inner chains, the cover member having an upper surface substantially parallel to the conveyor surfaces, the cover member substantially preventing material from entering the central space between the first conveyor and the second conveyor, and a divider member connected to the cover member and extending generally perpendicular to the upper surface. The conveyor assembly may include scraper members operable to move material on the upper surface of the cover during movement of the conveyor chains. | 07-28-2011 |
20110131967 | BRAKE SYSTEM AND VEHICLE COMPRISING A BRAKE SYSTEM - A vehicle and a brake system for a vehicle include at least one hydraulic pump, wherein the at least one hydraulic pump is connected to an input fluid conduit and an output fluid conduit. A flow resistance unit is provided in the output fluid conduit of the at least one hydraulic pump for being selectively coupled into the output fluid conduit when brake torque is requested. | 06-09-2011 |
20110093229 | METHOD FOR CALIBRATING SENSORS - A method for calibrating sensors in a system including a plurality of sensors which are arranged so that they can be subjected to the same load includes the steps of detecting the level of an operating parameter for a certain load level individually by at least two of the sensors, calculating a mean value of the operating parameter for the sensors for the load level, determining a deviation from the mean value for each of the sensors, and saving the value of the deviations for use in operation of the system. | 04-21-2011 |
20110087407 | METHOD FOR CONTROLLING A POWER SOURCE - A method, an electronic control unit, a vehicle control system and a working machine for controlling an power source adapted to drive at least one ground engaging element of the working machine are provided. The method includes receiving an operator control input indicative of the control of the power source, receiving a state input indicative of an operating state of the machine, determining an operation signal in the response to the operator control input and the operating state input, and sending the determined operation signal for controlling the power source accordingly. An accelerator signal converter adapted to perform any of the method steps is provided, as is an Electronic Control Unit (ECU) including the accelerator signal converter, a vehicle control system including the ECU, and a working machine including the vehicle control system. | 04-14-2011 |
20110067944 | STRAIGHT MOTION ASSISTING DEVICE FOR A WORK MACHINE - A straight motion assisting device for a work machine is adapted for receiving an input indicative of a steering angle from a position of a moveable member and adapted for applying a restoring force for affecting the work machine towards a straight motion when the steering angle input indicates that the work machine deviates from the straight motion. The device includes a hydraulic system adapted to be effected by the displacement of the moveable member and adapted to apply the restoring force. | 03-24-2011 |
20110066336 | A METHOD FOR OPERATING A TRANSPORT VEHICLE, A TRANSPORT VEHICLE, A METHOD FOR CONTROLLLING OPERATION OF A WORK SITE AND A WORK SITE SYSTEM - A method is provided for operating a transport vehicle provided with a container with due regard to a weight of a received material in the container. The method includes receiving information associated to the weight of the received material in the container from an external source, and in response to the weight information controlling operation of the vehicle. | 03-17-2011 |
20110060508 | A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM - The present invention relates to a hydraulic system control unit, a hydraulic system and a working machine for controlling a hydraulic system adapted to perform at least one hydraulic work function in a working machine. The hydraulic system performs the hydraulic control function in accordance with an operation signal determined by a hydraulic system control unit. In a first step ( | 03-10-2011 |
20110060504 | METHOD AND A SYSTEM FOR OPERATING A WORKING MACHINE - A method and a system for operating a working machine provided with a hydraulic system and an operator control adapted to command actuation of the hydraulic system is provided. The system includes a first control unit and a second control unit for moving an implement on the working machine and/or for steering the working machine. The method includes receiving first information regarding a status of the operator control, and determining at least one hydraulic system control information based on the first information and sending the determined hydraulic system control information to a second control unit which is adapted to control the hydraulic system accordingly. | 03-10-2011 |
20110024204 | CONSTRUCTION VEHICLE WITH A SPLIT HYDRAULIC HOLDING UNIT - A construction vehicle includes a wheeled chassis supporting at least one article of work equipment, hydraulically actuated, a hydraulic power unit driving the work equipment including a hydraulic pump connected to an hydraulic liquid holding unit and to a hydraulic control unit distributing hydraulic power the work equipment, a driver's compartment including a driver's floor, wherein the hydraulic liquid holding unit includes a main hydraulic reservoir which is disposed on the chassis at a level lower than the driver's floor level, and at least one auxiliary hydraulic reservoir which is disposed on the chassis at a level above the driver's floor level. | 02-03-2011 |
20110010055 | CONTROL SYSTEM AND WORKING MACHINE COMPRISING THE CONTROL SYSTEM - A control system for a working machine includes a device for changing direction of the working machine, an operator controlled lever, and an electronic control unit adapted to receive an input signal indicative of desired direction from the position of the operator controlled element and to generate an output signal for producing a change of direction of the working machine, corresponding to the position of the operator controlled element, via said device. The control system includes an electronic safety device adapted to be controlled by the position of the operator controlled element and adapted to allow control of the device via the output signal and to block control of the device via the output signal, respectively, depending on the position of the operator controlled element. | 01-13-2011 |
20110005873 | BRAKE FOR A WORK MACHINE, A WHEEL HUB UNIT AND A WORK MACHINE - A brake for a work machine includes a brake rotor, a hydraulically operated device for actuating the brake by clamping the brake rotor, and an arrangement for damping jerks resulting from a sudden brake actuation. The brake rotor includes a pair of brake force transmitting discs and the damping arrangement is formed by a damping layer positioned between the discs and secured to each of the discs. | 01-13-2011 |
20110005848 | WORK MACHINE - A work machine includes a front section with a front frame, a first set of ground engaging members and a power source for propelling the work machine, a rear section with a rear frame, a second set of ground engaging members and a load-carrying container. The rear section includes an electric drive system adapted for driving at least one ground engaging member of the second set. The rear section is detachably connected to the front section. The power source of the front section is adapted to power the electric drive system in the rear section in an attached state of the front and rear sections. The electric drive system is adapted for driving the at least one ground engaging member of the second set for self-propelling of the rear section in a detached state. | 01-13-2011 |
20100332061 | METHOD AND A CONTROL SYSTEM FOR CONTROLLING A WORK MACHINE - A method is provided for controlling a work machine during operation in a repeated work cycle including controlling transfer of power to and from an energy storage arrangement in the work machine according to a predetermined control strategy, which is adapted for the characteristics of the work cycle. | 12-30-2010 |
20100327649 | METHOD AND A DEVICE FOR CONTROLLING A VEHICLE COMPRISING A DUMP BODY - A method for controlling a vehicle including a dump body includes automatically monitoring the contents of the dump body during an elevating motion, determining when the dump body has reached a predefined condition during the elevating motion, and controlling the vehicle when it is determined that the dump body has reached the predefined condition. | 12-30-2010 |
20100307846 | HYBRID ELECTRICAL WORKING MACHINE - A work machine includes a front section with a front frame and a first set of ground engaging members, a rear section with a rear frame and a second set of ground engaging members, and at least one pivot joint between the front section and the rear section allowing the front section to pivot with regard to the rear section. One of the front section and the rear section includes a power source, and the other of the front section and the rear section includes at least one electric motor adapted for driving at least one of the ground engaging members. | 12-09-2010 |
20100292049 | METHOD AND A SYSTEM FOR BRAKING A VEHICLE - A method for braking a vehicle is provided, wherein the vehicle includes a circuit adapted for transmitting a brake signal from an operator controlled braking element to brake devices arranged at a plurality of the vehicle's ground engaging elements via a brake fluid. The method includes detecting a fluid pressure in the circuit, using the detected fluid pressure level as an input for determining a brake power for at least one auxiliary brake in the vehicle, and controlling the auxiliary brake responsively. | 11-18-2010 |
20100289297 | COMPARTMENT MOUNTED AT AN UNDERSIDE OF AN UPPER FRAME OF A CONSTRUCTION EQUIPMENT - Construction equipment includes an undercarriage on which an upper frame is mounted, especially in the form of an excavator or crane. At an underside of the upper frame at least one flap and/or at least one compartment is arranged which can be open and closed and which is adapted such that a component of the construction equipment can be operated or is accessible or can be stored when the flap or compartment is open, or such that a compartment is provided for a fuel filler pump, a fuel suction hose, tools, accessories and/or spare parts. | 11-18-2010 |
20100263735 | METHOD FOR WHEN NECESSARY AUTOMATICALLY LIMITING A PRESSURE IN A HYDRAULIC SYSTEM DURING OPERATION - A method is provided for, when necessary, automatically limiting a pressure in a hydraulic system during operation. A system is arranged to deliver pressurized hydraulic fluid to at least one fluid actuated device arranged to perform a work function, where the procedure includes sensing a pressure in at least one position of the system, comparing the detected pressure value, or an associated value, with a first predefined pressure limit, and opening a communication of fluid between the fluid actuated device and a reservoir through a first conduit if the sensed pressure value, or an associated value, exceeds the predefined limit. | 10-21-2010 |
20100263362 | METHOD FOR CONTROLLING A WORKING MACHINE - A method for controlling a working machine including a hydraulic system for controlling a plurality of work functions, including lift and tilt of an implement, includes the steps of determining a maximum pressure of a hydraulic fluid for performing a certain task with the implement individually for at least one of the work functions, and delivering the hydraulic fluid, pressurized at most to the determined maximum pressure, to the work function. | 10-21-2010 |
20100257758 | ARRANGEMENT FOR SUSPENSION OF AN OPERATOR CAB ON A WORK MACHINE FRAME - An arrangement for suspension of an operator cab on a machine frame in order to permit controlled motion of the cab relative to the frame is provided. The arrangement includes at least one first suspension member disposed between an underside of the cab and the frame for supporting the cab on the frame. The arrangement further includes at least one second suspension member disposed between a rear side of the cab and a rigid support structure and wherein the second suspension member is arranged at an elevated position relative to the underside of the cab. The second suspension member is adapted to provide an increased rigidity against cab movements both in the longitudinal and lateral direction of the machine during operation of the work machine. | 10-14-2010 |
20100198466 | METHOD FOR PROVIDING AN OPERATOR OF A WORK MACHINE WITH OPERATION INSTRUCTIONS AND A COMPUTER PROGRAM FOR IMPLEMENTING THE METHOD - A method is provided for providing an operator of a work machine with operating instructions when the work machine is used in a repeated work cycle. The method includes automatically instructing the operator of the work machine how to operate the work machine in an optimum way with regard to a specific parameter on the basis of characteristics of the specific work cycle. | 08-05-2010 |
20100184005 | METHOD FOR PROVIDING AN OPERATOR OF A VEHICLE WITH OPERATING INFORMATION - A method for providing an operator of a vehicle with operating information includes providing at least one predetermined demonstration of the operating information, deciding if one of the at least one predetermined demonstration is desired to be presented to the operator and, if desired, automatically presenting the demonstration to the operator in an operator compartment of the vehicle when the operator is in an operational position. | 07-22-2010 |
20100179735 | A METHOD AND A SYSTEM FOR CONTROLLING AN INPUT POWER - A method for controlling power to at least one power consuming device includes detecting at least one first operational parameter and at least one second operational parameter, establishing a power value based on the detected values of the first and second operational parameters, and controlling the power consuming device in response to the established power value. | 07-15-2010 |
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 |
20100131122 | METHOD FOR CONTROLLING A WORK MACHINE DURING OPERATION IN A REPEATED WORK CYCLE - A method is provided for controlling a work machine during operation in a repeated work cycle including the steps of establishing a control strategy on the basis of at least one condition that varies in the course of the work cycle, and controlling at least one device in a work machine power transmission system in response to the established control strategy. | 05-27-2010 |
20100094492 | METHOD FOR OPERATING A WORKING MACHINE AND A WORKING MACHINE WITH AN IMPROVED TRANSMISSION LINE - A working machine and a method for operating the same are provided. The working machine is provided with: a power source and a plurality of driving wheels; a working hydraulic system including at least one hydraulic pump powered by the power source for moving an implement on the working machine and/or for steering the working machine; a transmission line arranged between the power source and the driving wheels for transmitting torque from the power source to the driving wheels; and a transmission unit arranged in the transmission line for reducing the mechanical interaction between the power source and the driving wheels. The method includes: detecting at least one operational parameter indicative of a working condition of the working machine; determining if the characteristic of the transmission unit should be altered on the basis of a magnitude of the detected operational parameter; altering the characteristic of the transmission unit if it is determined to be required. | 04-15-2010 |
20100089050 | METHOD FOR OPERATING A WORKING MACHINE AND A WORKING MACHINE - A method for operating a working machine provided with a power source providing power and a plurality of power consuming systems connected to the power source includes the steps of providing a model predicting a power demanded by at least one of the power consuming systems, detecting at least one operational parameter indicative of a power demand, using the detected operational parameter in the prediction model, and balancing a provided power to the demanded power according to the prediction model. | 04-15-2010 |
20100083650 | HYDRAULIC CIRCUIT FOR OPERATING A TOOL - A hydraulic circuit for operating a tool is provided that is particularly useful in construction equipment such as an excavator, crane, wheel loader, drilling machine, or others. Furthermore, a control unit and a method for controlling the hydraulic circuit and construction equipment including such a hydraulic circuit is disclosed. | 04-08-2010 |
20100042281 | METHOD AND A SYSTEM FOR PROVIDING FEEDBACK TO A VEHICLE OPERATOR - A method for providing feedback to a vehicle operator regarding an operational state of a vehicle power transmission system in operation includes the steps of detecting at least one operational parameter indicative of said operational state, and providing an audio feedback signal to the operator in response to a magnitude of the detected operational parameter. | 02-18-2010 |
20090287373 | CONTROL SYSTEM FOR A WORK MACHINE AND METHOD FOR CONTROLLING A HYDRAULIC CYLINDER - A control system for a work machine is provided, which system includes an electric machine, a hydraulic machine and at least one hydraulic cylinder. The electric machine is connected in a driving manner to the hydraulic machine. The hydraulic machine is connected to a piston side of the hydraulic cylinder via a first line and a piston-rod side of the hydraulic cylinder via a second line. The hydraulic machine is adapted to be driven by the electric machine and supply the hydraulic cylinder with pressurized hydraulic fluid from a tank in a first operating state and to be driven by a hydraulic fluid flow from the hydraulic cylinder and drive the electric machine in a second operating state. | 11-19-2009 |