| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 192850630 | Including fluid pressure control | 70 |
| 20100051408 | CONTROL DEVICE FOR A GEARBOX AND METHOD FOR CONTROLLING A GEARBOX - A control device for and a method of controlling a gearbox having a pressure-limiting device connected to a pressure medium source. A first controllable valve device is connected downstream of the pressure-limiting device and an actuating device is connected further downstream and adjusts the gearbox. A second controllable valve device is connected directly to the pressure medium source, via a supply line, and another actuating device is connected downstream of the second controllable valve device. An electric control device is provided for actuating the controllable valve devices and a sensor is connected to the electric control device for measuring pressure of the pressure medium in the supply line. The electric control device is connected to the second controllable valve device such that the second controllable valve device and the further actuating device are controlled by the pressure of the pressure medium in the supply line. | 03-04-2010 |
| 20100155192 | HYDRAULIC SYSTEM - The present disclosure relates to a hydraulic system with a hydraulic fluid, with a work element actuable by the fluid, with a fluid pump for the application of a fluid pressure to the fluid, with the fluid pump being operable to generate a reference depression in the system, and with a pressure sensor for the measurement of the fluid pressure which is in communication with a control unit which is designed to carry out a calibration of the pressure sensor with reference to the reference depression. The present disclosure also relates to a method for the calibration of a pressure sensor which is provided for the measurement of the fluid pressure of a hydraulic fluid contained in a hydraulic system. | 06-24-2010 |
| 20100181159 | Power transmission device and vehicle having the same - A power transmission device that includes a clutch that transmits power from a motor to an axle; a first pump that is driven by power from the motor to generate and output fluid pressure; a second pump that receives and is driven by a supply of electric power to generate and output fluid pressure; a pressure regulating valve that regulates a pressure of operation fluid output from the first pump, and delivers at least a portion of operation fluid discharged in connection with the pressure regulation to a lubrication target for use as lubricant; and a switching valve that switches between a first connection state and a second connection state. | 07-22-2010 |
| 20100193315 | Power transmission device and vehicle having the same - A power transmission device includes a clutch that transmits power from a motor to an axle; a first pump that is driven by power from the motor to generate and output fluid pressure; a second pump that receives and is driven by a supply of electric power to generate and output fluid pressure; a pressure regulating valve that functions as a linear solenoid valve and is formed with an input port, an output port that is connected to the clutch, and a drain port; and a switching valve that switches between a first connection state. | 08-05-2010 |
| 20100193316 | ACTUATION DEVICE FOR A CLUTCH - An actuation device and a method for actuating a clutch, in particular for a hybrid drive, include a master cylinder having an interior separated by a master piston into master and slave oil chambers. The slave oil chamber is connected, via a valve in a first valve position, to a tank line leading to an oil reservoir and in a second valve position, to a pressure line of the oil reservoir. The master oil chamber is connected via a working line to an oil chamber of a slave cylinder and to a compensating tank via a compensating line as a function of the position of the master piston. The compensating tank has a compensating volume which has, at its highest point, an overflow which is connected to the tank line and in its first position the valve connects the slave oil chamber to the compensating tank via a return line. | 08-05-2010 |
| 20100243402 | DEVICE FOR ACTUATING A DUAL CLUTCH TRANSMISSION - A device is provided for actuating a dual clutch transmission (DCT). In order to provide a device for actuating a dual clutch transmission for controlling a double clutch transmission with 5 synchronizer actuators and 2 input clutch actuators, the device includes, but is not limited to two branches, one branch comprising four flow regulators and one pressure regulator and the second branch comprising three flow regulators and one pressure regulator. The hydraulic system controls two clutch actuator pressures and five gear actuator positions. In this context, the flow regulators are used to control the rod position of a dual effect hoist and the pressure regulators control the effort available on the rod of a single effect hoist through a calibrated orifice. | 09-30-2010 |
| 20100300828 | Dual-Stage Regulator Valve Assembly - The present disclosure relates to dual-stage regulator valve assemblies for use with vehicle transmissions and methods of manufacturing the same. A dual-stage regulator valve is configured to increase a flow area in the valve during clutch fill thereby reducing transmission shift time. Transition between a clutch fill and a pressure control state is automated. | 12-02-2010 |
| 20110132717 | HYDRAULIC CONTROL APPARATUS OF AUTOMATIC TRANSMISSION - A circulation pressure is supplied to a starting device ( | 06-09-2011 |
| 20110155533 | Hydraulic system with a regulating circuit for controlling a motor vehicle transmission with automated actuation of clutches - The invention relates to a hydraulic system for controlling a vehicle transmission with automated actuation of clutches of a motor vehicle, having:
| 06-30-2011 |
| 20110168515 | FLOW RATE CONTROL VALVE FOR CLUTCH CONTROL DEVICE - A clutch control device for vehicle equipped with a clutch actuator driven by a working fluid, wherein secular change in the flow rate control valve for controlling the working fluid is compensated, and the rate of connection of the clutch is correctly controlled by a simple means. To control the stroke of a clutch actuator | 07-14-2011 |
| 20110168516 | FLOW RATE CONTROL VALVE FOR CLUTCH CONTROL DEVICE - A clutch control device for vehicle equipped with a clutch actuator driven by a working fluid, wherein the rate of connection of the clutch is correctly controlled by using a simple means while compensating for secular changes in a flow rate control valve that controls the working fluid. To control the stroke of the clutch actuator | 07-14-2011 |
| 20110174590 | ARRANGEMENT FOR INHIBITING RANGE SHIFTING IN A TRANSMISSION - An arrangement for inhibiting axial movement of a range clutch in a transmission includes a driver adapted to move the range clutch axially on an output shaft between a high range position and a low range position, a sensor arrangement adapted to sense at least one of reverse rotational direction and potential reverse rotational direction of at least one of a main shaft and the output shaft and to generate an inhibit range shift signal upon sensing at least one of reverse rotational direction and potential reverse rotational direction, and a controller adapted to inhibit operation of the driver upon receipt of the inhibit range shift signal from the sensor arrangement. A transmission and a vehicle including such an arrangement are also disclosed. A method for inhibiting axial movement of a range clutch in a transmission, and a method of retrofitting a transmission with an arrangement for inhibiting axial movement of a range clutch are also disclosed. | 07-21-2011 |
| 20110180364 | ELECTRO-HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of pressure and flow control devices and logic valve assemblies in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio. | 07-28-2011 |
| 20110192701 | Ventilation Device for a Hydraulic Cylinder - The invention proposes a ventilation device that is intended for a hydraulic cylinder, in particular a dual clutch transmission, and that comprises a flow channel that has an inlet and an outlet and passes through the ventilation device, and comprises a closing element that releases the outlet in at least a first functional position and closes said outlet in a second functional position. The ventilation device is characterized by the closing element being arranged in its first functional position in such a way that it closes the inlet. | 08-11-2011 |
| 20110278130 | HYDRAULIC CONTROL DEVICE - A hydraulic control device that controls a hydraulic pressure to be supplied to a hydraulic servo for a hydraulically driven friction engagement element in an automatic transmission that changes between shift speeds by switching an engagement state of the friction engagement element. The control device configured with a switching mechanism that allows communication between oil passage for a first pressure regulation mechanism and the oil passage for a hydraulic servo and blocking communication between an oil passage for the second pressure regulation mechanism and the oil passage for the hydraulic servo when the signal pressure is not input to the signal pressure input oil passage, and blocking communication between the oil passage for the first pressure regulation mechanism and the oil passage for the hydraulic servo and allowing communication between the oil passage for the second pressure regulation mechanism. | 11-17-2011 |
| 20110315503 | SELECTABLE VALVE ASSEMBLY FOR A VEHICLE TRANSMISSION - A hydraulic valve assembly for controlling a clutch in a vehicle transmission. The valve assembly includes a housing with a first port for connection to a source of pressurized hydraulic fluid, a displaceable sealing piston disposed within the housing, a valve spring for displacing the sealing piston, a snap-spring having first and second equilibrium positions, and an overstroke spring. In the first equilibrium position a spring force displaces the sealing piston to uncover the first port to enable fluid flow through the valve, and in the second equilibrium position the valve spring displaces the sealing piston to block the first port to block fluid flow through the valve. Moving from the first equilibrium position to the second equilibrium position includes displacing the overstroke spring. | 12-29-2011 |
| 20120055753 | HYDRAULIC SYSTEM - A hydraulic system is preferably used in combination with a motor and a clutch of a hybrid vehicle. The hydraulic system is comprised of a pump coupled with the motor to pressurize fluid; a pressurized fluid path coupled with the pump to conduct the pressurized fluid; an operating fluid path connecting the pressurized fluid path with the clutch to actuate the clutch; a depressurized fluid path to conduct depressurized fluid; and an on-off valve operated in cooperation with the clutch to selectively permit fluid connection of the pressurized fluid path to the depressurized fluid path so as to relieve pressure in the pressurized fluid path. | 03-08-2012 |
| 20120067690 | HYDRAULIC CLUTCH AND METHOD FOR DETERMINING AN ADAPTIVE CLUTCH FILL VOLUME OF THE HYDRAULIC CLUTCH - At least a method is provided learning a characteristic filling volume of a hydraulic clutch. The method includes, but is not limited to applying a pressure pulse to the hydraulic clutch when the clutch is in a disengaged state and determining an inflection event at an input or at an output of a torque path in which the hydraulic clutch is situated. A characteristic filling volume of the hydraulic clutch is derived from the determined inflection event. Furthermore, a method is provided for learning a characteristic return spring pressure of the hydraulic clutch, for engaging the hydraulic clutch and corresponding devices for carrying out these methods. | 03-22-2012 |
| 20120090945 | POWERTRAIN PRESSURE AND FLOW CONTROL SYSTEM FOR DOG CLUTCHES - A pressure and flow control system for a dog clutch includes a pilot valve, a regulating valve, and a selector. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The selector is configured to engage and disengage the dog clutch in response to the control signal. | 04-19-2012 |
| 20120090946 | POWERTRAIN PRESSURE CONTROL SYSTEM - A pressure control system includes a hydraulically-controlled component, a pilot valve, and a regulating valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal, which controls the hydraulically-controlled component. | 04-19-2012 |
| 20120090947 | POWERTRAIN PRESSURE AND FLOW CONTROL SYSTEM FOR A TORQUE CONVERTER CLUTCH - A pressure and flow control system for a torque converter clutch includes a pilot valve, a regulating valve, and a torque converter control valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The torque converter control valve is configured to engage and disengage the torque converter clutch in response to the control signal. | 04-19-2012 |
| 20120090948 | POWERTRAIN PRESSURE CONTROL SYSTEM - A clutch includes a pilot valve, a regulating valve, and a clutch control valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The clutch control valve is configured to engage and disengage the clutch in response to the control signal. The clutch may be configured as one of a wet clutch and a dry clutch. | 04-19-2012 |
| 20120138414 | CONTROLLING APPARATUS FOR FAN CLUTCH'S RPM IN IDLE AND METHOD THEREOF - A control method for controlling an idle rotation speed of a fan clutch may include sensing an idle state of a cooling fan by comparing a coolant temperature with a predetermined operating temperature, inputting a rotation speed of the cooling fan and the coolant temperature to an engine control unit (ECU), outputting a valve control signal controlled by the coolant temperature and the rotation speed of the cooling fan in the ECU, inputting the valve control signal to a valve, and opening/closing the valve according to the valve control signal. An apparatus for applying the method may include the fan clutch which comprises a housing, a rotor, a cover, an oil chamber, a valve, an antirotation bracket connected to the fan clutch and transmitting data, and an ECU calculating the valve control signal. | 06-07-2012 |
| 20120138415 | HYDRAULIC CONTROL DEVICE - A hydraulic control device is provided with a linear solenoid valve, a shift valve, and a controller. The linear solenoid valve has a gain switching chamber which produces a biasing force in a direction to close the linear solenoid valve to switch the gain characteristic of the linear solenoid valve when oil pressure is supplied to the gain switching chamber. The shift valve is configured to be switchable between a supply state in which the output oil pressure from the linear solenoid valve is supplied to the gain switching chamber and a blocked state in which the supply of the output oil pressure is blocked. The controller brings the shift valve into the supply state when a necessary oil pressure of an engagement element is high and into the blocked state when the necessary oil pressure of the engagement element is low. | 06-07-2012 |
| 20120152688 | AUTOMATIC TRANSMISSION SHIFT QUALITY VIA SELECTIVE USE OF CLOSED-LOOP PRESSURE FEEDBACK CONTROL - A method to control a hydraulically actuated clutch in a transmission of a vehicle includes monitoring a pressure in a hydraulic circuit providing pressurized fluid to the hydraulically actuated clutch with micro-electromechanical pressure sensor, providing a closed-loop feedback control command for a hydraulic control device providing the pressurized fluid to the hydraulic circuit based upon the monitoring pressure, and controlling the control device based upon the closed-loop feedback control command. | 06-21-2012 |
| 20120168274 | HYDRAULIC CIRCUIT FOR AUTOMATIC TRANSMISSION HAVING AREA CONTROLLED SHIFT ACTUATOR VALVE WITH FLOW FORCE COMPENSATION - A hydraulic circuit ( | 07-05-2012 |
| 20120186933 | CLUTCH AND A METHOD OF MODIFYING A CLUTCH - A manually-operated clutch has an actuator and a force limiter. The actuator has a control portion and an engagement portion, the control portion controlling a motive force that engages the engagement portion with a transmission. The force limiter is between the control portion and the engagement portion and limits the motive force above a predetermined threshold. | 07-26-2012 |
| 20120186934 | VEHICLE HYDRAULIC CLUTCH APPARATUS - A vehicle hydraulic clutch apparatus includes a clutch master cylinder that generates clutch working oil pressure in response to operation of a clutch pedal, and a concentric slave cylinder that engages and releases a friction clutch as the clutch working oil pressure generated by the clutch master cylinder is supplied thereto and discharged therefrom via an oil passageway. A flow restraint device ( | 07-26-2012 |
| 20120199437 | VEHICLE CONTROL DEVICE - A first clutch CL1 is disposed between engine Eng and left and right rear wheels RL, RR, and control of disengaging first clutch CL | 08-09-2012 |
| 20120211324 | VEHICLE FLUID PRESSURE CONTROL - A vehicle includes a pump configured to output fluid at a commanded pressure when driven by a motor. A first hydraulic device is operably connected to the pump and configured to operate in response to receiving fluid at a first pressure. A second hydraulic device is operably connected to the pump and configured to execute a shift command in response to receiving fluid at a second pressure. A control processor is configured to control the commanded pressure in accordance with a priority scheme. That is, the control processor is configured to direct at least a portion of the commanded pressure from the first hydraulic device to the second hydraulic device for a duration of a shift command based on the priority scheme and redirect at least a portion of the commanded pressure to the first hydraulic device upon completion of the shift action. | 08-23-2012 |
| 20120211325 | HYDRAULIC CONTROL DEVICE FOR VEHICULAR FRICTION CLUTCH - Providing a hydraulic control device for a friction clutch for a vehicle, which permits the vehicular friction clutch to have an improved response of its releasing action. The hydraulic control device includes a braking valve provided in an oil passage through which a working oil is discharged from a clutch cylinder to place the friction clutch in its engaged state, and the braking valve permits the working oil to be discharged from the clutch cylinder when a pressure acting on an end portion of the braking valve on the side of the clutch cylinder has exceeded a predetermined clutch releasing pressure value, so that a discharge flow of the working oil from a pressure chamber of the clutch cylinder is restricted due to the braking valve even when the pressure in the pressure chamber is reduced below the atmospheric pressure value, whereby it is possible to prevent an increase of a gap formed between a pair of pistons of the clutch cylinder, permitting an improvement of a response of the releasing action of the friction clutch. | 08-23-2012 |
| 20120234645 | FLUID PRESSURE CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - A fluid pressure control device including a first pump actuated by power from a motor; a pressure regulator that regulates a discharge pressure from the first pump; a second pump actuated by electric power; a switcher opening a first path extending from the pressure regulator to a fluid pressure chamber of a friction engagement element, and blocking a second path extending from the second pump to the fluid pressure chamber of the friction engagement element, when the signal pressure is equal to or more than a set pressure, and the switcher blocking the first and opening the second paths when the signal pressure is less than the set pressure; and a control that controls the second pump and the fluid supply unit to supply the fluid regulated by the pressure regulator to a destination different from the fluid pressure chamber of the friction engagement element when the motor is stopped. | 09-20-2012 |
| 20120247910 | METHOD FOR ADAPTING THE RAPID FILLING TIME OF A CLUTCH - A method of adapting the rapid filling time of a clutch. During adaptation, the clutch is filled by at least two successive rapid filling pulses with increasing rapid filling times. For each rapid filling pulse a reaction, resulting from the filling pulse, is monitored. If a defined reaction, for one of the rapid filling pulses, is recognized for the first time whereas for the, or for each of the previous rapid filling pulse(s) the defined reaction was not observed, then as a function of the rapid filling time of that rapid filling pulse for which the defined reaction was recognized for the first time, carrying out the adaptation of the rapid filling time and, for each rapid filling pulse used for the adaptation, gradients of the clutch pressure produced as a result of the respective rapid filling pulse are evaluated to determine the defined reaction pressure. | 10-04-2012 |
| 20120298469 | Clutch System and Method for Operating a Clutch System - A clutch system for closing and interrupting a force flow includes a clutch actuator that can have a pressure medium applied thereto, a first electrically actuatable valve device and a second electrically actuatable valve device. Pressure medium can be fed into a switching chamber of the clutch actuator by the first valve device for building up pressure, and pressure medium can be discharged again by the second valve device for releasing pressure. The clutch system interrupts or closes the force flow at a pressure P≧Pd in the switching chamber. A method for operating the clutch system for closing and interrupting a force flow prevents a subsequent pressure buildup in the switching chamber sufficient for actuating the clutch system if the first valve device and the second valve device malfunction. | 11-29-2012 |
| 20120298470 | HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - At pre-shift of a shift control, a line pressure control section determines a pressure raising amount ΔPL of a line pressure PL on the basis of a pressure raising amount map stored in a memory, and controls a line pressure controlling linear solenoid valve so that the line pressure PL regulated by a regulator valve is raised by this pressure raising amount ΔPL. For example, a control hydraulic pressure corresponding to the pressure raising amount ΔPL is applied to the regulator valve from the line pressure controlling linear solenoid valve. Thus, hydraulic oil supplied from an oil pump is mostly discharged from an output port for the line pressure PL. Therefore, although there is a possibility that the line pressure PL regulated within a line pressure circuit somewhat varies when stroke of a hydraulic piston starts, a decrease of the line pressure PL is suppressed sufficiently compared with the case where the line pressure PL is not raised as a conventional manner. | 11-29-2012 |
| 20130001037 | Device Having a Molded Seal - The invention relates to a device having at least one first component ( | 01-03-2013 |
| 20130020168 | CONTROL DEVICE AND METHOD FOR CONTROLLING - The invention relates to a control device and to a method for controlling an automated clutch, which includes a hydraulic clutch actuating system, which has a hydrostatic actuator, which is driven by and electric-motor actuating drive having an incremental displacement sensor in such a way that the actuator moves in a translatable manner. The invention includes an absolute displacement sensor, which detects the actuator position. | 01-24-2013 |
| 20130020169 | METHOD FOR CONTROLLING AN AUTOMATED CLUTCH - A method for controlling an automated clutch, which comprises a hydraulic clutch actuating system having a hydrostatic actuator, the pressure of which is detected. The method includes using the pressure of the hydrostatic actuator to adapt the characteristic curve of the clutch. | 01-24-2013 |
| 20130025998 | CLUTCH DEVICE AND CONTROL METHOD - A clutch device has a first clutch part and a second clutch part which can selectively be brought into engagement with one another with form fitting as well as a control unit which includes a disengagement unit and an actuator unit operable by means of a fluid pressure. A force disengaging the clutch parts can be generated by the disengagement unit and a force engaging the clutch parts can be generated by the actuator unit. The control device includes a pressure holding device to reduce a fluid pressure acting on the actuator unit in accordance with a predefined characteristic. | 01-31-2013 |
| 20130025999 | METHOD FOR OPERATING AN AUTOMATED CLUTCH - The invention relates to a method for operating an automated clutch of a motor vehicle, which is operated using a hydrostatic actuator of a hydraulic clutch operating system, which includes a slave cylinder and a master cylinder that contain hydraulic medium, a volume equalization of the hydraulic medium being carried out in a driving operation in order to counteract a detuning of the clutch operating system. The invention is distinguished by the fact that the volume equalization is carried out as needed during operation of the clutch depending on current clutch characteristic values, if the driving comfort is not, or not inappropriately, diminished. | 01-31-2013 |
| 20130032444 | METHOD FOR CONTROLLING AN AUTOMATED CLUTCH - A method for controlling an automated clutch ( | 02-07-2013 |
| 20130037372 | HYDRAULIC CLUTCH CONTROL DEVICE OF VEHICLE POWER UNIT - A hydraulic clutch control device of a vehicle power unit in which the oil pressure control valve is prevented from being exposed above the oil level even when a vehicle body inclines frontward or rearward. A housing chamber housing an actuator is formed in a housing chamber forming body attached to an engine main body and an oil pressure control valve partially facing the housing chamber is supported by the housing chamber forming body. An oil return hole used to return excess hydraulic oil from the housing chamber into the engine main body is provided in the housing chamber forming body to communicate with an upper portion of the housing chamber at an end portion of the housing chamber on a side close to the oil pressure control valve. | 02-14-2013 |
| 20130075222 | PRESSURE HOLDING TRANSMISSION CLUTCH WITH BALL CHECK VALVE - A check valve assembly for a clutch, including: an annular-shaped ring element including a first portion with: a first channel wholly enclosed by the first portion; a first through-bore between a radially inner surface of the first portion and the first channel; and a second through-bore between a radially outer surface of the first portion and the first channel. The assembly includes a first pressure regulating assembly at least partially disposed within the first channel and including: a spool axially displaceable within the first channel and including a space enclosed by the spool; a first ball disposed within the space and the first channel; and a first spring engaged with the spool. The spool is arranged to axially displace in response to hydraulic pressure at the first through-bore and axial force applied by the first spring to displace the first ball to block or unblock flow between the first and second through-bores. | 03-28-2013 |
| 20130105268 | Power Take-Off Transmission | 05-02-2013 |
| 20130112524 | HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION - A hydraulic control system for a transmission includes a pressure regular subsystem, a transmission range selection control subsystem, and a clutch control subsystem. The pressure regulator subsystem includes a source of pressurized hydraulic fluid for providing a flow of hydraulic fluid. The transmission range selection control subsystem includes a set of four valve assemblies actuated by a pair of solenoids. And the clutch control subsystem provides pressurized hydraulic fluid to a plurality of clutch actuators activated by a plurality of variable force solenoids through a plurality of valve assemblies. The plurality of valve assemblies of the clutch control subsystem are in fluid communication with the transmission range selection control subsystem, and the transmission range selection control subsystem employs the pressurized hydraulic fluid to engage a range selection through the clutch control subsystem. | 05-09-2013 |
| 20130118855 | METHOD FOR CONTROLLING CLUTCH OF AUTOMATIC TRANSMISSION FOR IMPROVEMENT OF FUEL EFFICIENCY - A method for controlling a clutch of an automatic transmission for improvement of fuel efficiency may include determining whether external driving conditions of a vehicle meets coasting conditions, determining a clutch slip control time and an amount of clutch slip torque according to internal driving conditions of the vehicle, performing slip control on a clutch that works at each step of the automatic transmission using the determined clutch slip control time and torque, wherein an engine brake torque transmitted to a final output shaft of the automatic transmission may be reduced. | 05-16-2013 |
| 20130192949 | POWERTRAIN HYDRAULIC SYSTEM FOR HYBRID ELECTRIC VEHICLES - A hydraulic system for a vehicle powertrain includes a module including a clutch, an electric machine and a first sump, a transmission including a line pressure source and a second sump, and a pump that supplies fluid from the first sump to the line pressure source when the source of line pressure is unavailable, and supplies fluid from the first sump to the second sump when fluid volume in the second sump is low. | 08-01-2013 |
| 20130213760 | METHOD AND APPARATUS FOR CLUTCH PRESSURE CONTROL - A method, apparatus and system for controlling transmission clutch system output pressures is provided. A transmission control unit and a pressure control device including an electro-hydraulic valve and a pressure switch cooperate to provide self-calibrating clutch pressure control systems. | 08-22-2013 |
| 20130256087 | SHIFTING ELEMENT WITH THREE SHIFT POSITIONS - A method of actuating a shifting element with three shift positions, having a simply controlled shifting cylinder as the actuating element, a shifting element for shifting to the three shift positions and a pressure regulator, such that the shifting cylinder is designed as a cylinder with one working line and the shifting element is pushed by the spring force of at least one spring element to an end position and moved to the other shift positions in opposition to the spring force. The central position is recognized in that, when the correct shifting element position is reached, the force for moving the shifting element in opposition to the spring force abruptly increases and, because of this, a specific pressure can be set by a pressure regulator for the central position. | 10-03-2013 |
| 20130319813 | LATCHING CLUTCH VALVE CONTROL SYSTEM - A valve assembly includes a valve body having an input in selective communication with an output, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The input communicates with the output when the valve piston is in a first position and the input does not communicate with the output when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body. | 12-05-2013 |
| 20130341152 | LATCHING CLUTCH VALVE CONTROL SYSTEM - An assembly includes a valve body having an inlet in selective communication with an outlet and having an unlatch port, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The inlet communicates with the outlet when the valve piston is in a first position and the inlet does not communicate with the outlet when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body. An unlatching mechanism is in communication with the unlatch port of the valve body. | 12-26-2013 |
| 20140001005 | Mechanical Slip Failsafe System For A Heavy-Duty Multi-Speed Fan Clutch | 01-02-2014 |
| 20140048377 | TRANSMISSION CLUTCH PISTON COMPENSATOR FEED CIRCUIT - A hydraulic control system of an automatic transmission includes a clutch compensator feed circuit that is in communication with clutch apply circuit exhaust fluid. The clutch compensator feed circuit receives exhaust fluid from one or more apply clutches, or other torque transmitting device(s), and feeds the exhaust fluid to the balance side of the clutch or other torque transmitting device. The clutch compensator feed circuit may be open to atmospheric pressure, such that the clutch compensator feed circuit is not pressurized with respect to atmospheric pressure. | 02-20-2014 |
| 20140083810 | HYDRAULIC SYSTEM FOR DOUBLE PISTON - A hydraulic system for a double piston includes a double piston that includes an operation piston with a first operation side and a second operation side, a first piston port for supplying hydraulic pressure to the first operation side, and a second piston port for supplying hydraulic pressure to the second operation side, a solenoid valve that receives a clutch control pressure and communicates with the first piston port through a first channel, a switch valve that receives the clutch control pressure from the solenoid valve, may be connected with the second piston port through a second channel, and selectively transmits the clutch control pressure to the second piston port, and a manual valve that receives a line pressure and selectively transmits the line pressure to the switch valve such that the clutch control pressure may be selectively transmitted to the second operation side through the second channel. | 03-27-2014 |
| 20140083811 | CLUTCH CONTROL SYSTEM OF CLUTCH APPARATUS FOR HYBRID VEHICLE - A clutch control system of a clutch apparatus for a vehicle, includes a regulator valve switchable between a first mode in which a fluid pressure of a hydraulic fluid to a pressurized chamber is regulated to a first predetermined fluid pressure and a second mode in which the fluid pressure to a canceller chamber is regulated to a second predetermined fluid pressure, the regulator valve discharging a portion of the hydraulic fluid as a drain lubricant to the clutch portion, a switching valve switchable between a supply mode in which the hydraulic fluid is supplied to the pressurized chamber and a discharge mode in which the pressurized chamber is connected to a reservoir, and a control valve controlling the regulator valve to be switched between the first mode and the second mode and controlling the switching valve to be switched between the supply mode and the discharge mode. | 03-27-2014 |
| 20140110213 | PATHS FOR SUPPLYING FLUID TO CLUTCHES OF AN AUTOMATIC TRANSMISSION - An assembly including an input including first, second, third and fourth passages, a shaft surrounding the input, a housing including a hub surrounding the shaft, a first path connecting the first passage to a first servo cylinder, a second path connecting the second passage to a second servo cylinder, a third path connecting the third passage to balance volumes, and a fourth path connecting the fourth passage to a third servo cylinder, bypassing the hub. | 04-24-2014 |
| 20140124324 | HYDRAULIC CONTROLLER FOR HYBRID DRIVE SYSTEM - A hydraulic control device configured with a source pressure generation section, a hydraulic servo for a clutch provided between an engine and a motor, a control solenoid valve that outputs a regulated source pressure to the hydraulic servo, and a switching section that switches a hydraulic passage, which extends between the source pressure generation section and the hydraulic servo to supply the engagement pressure, between a first and second state in which the hydraulic passage has a high conduit resistance compared to the first state at least until the clutch is engaged. The switching section switches the hydraulic passage into the second state during a failure in which the control solenoid valve is de-energized and the source pressure is directly supplied to the hydraulic servo as the engagement pressure, and switches the hydraulic passage into the first state during normal times when the failure does not occur. | 05-08-2014 |
| 20140291106 | CLUTCH CONTROL DEVICE IN POWER UNIT FOR VEHICLE - A solenoid body is attached to an outer surface side of a clutch cover attached to an engine main body so as to cover a pair of hydraulic clutches. A hydraulic control solenoid valve for controlling pressure of a hydraulic oil from an oil pump, a single switching valve for alternatively selecting hydraulic chambers of the pair of hydraulic clutches to be supplied with the hydraulic oil from the hydraulic control solenoid valve, and a shift solenoid valve for controlling operation of the switching valve are attached to the solenoid body. | 10-02-2014 |
| 20140360835 | FLUID FRICTION CLUTCH - The invention relates to a fluid friction clutch ( | 12-11-2014 |
| 20150034449 | ELECTRICALLY CONTROLLED SILICON OIL FAN CLUTCH ROTARY VALVE DEVICE - Disclosed is an electrically controlled silicon oil fan clutch rotary valve device. The valve device is based on a magnetic mandrel, including a triangle, a driven disc, a driving disc, and a guide disc intercombined, which achieves control over flow of silicon oil by controlling rotation of a valve, and achieves precise control over positions by resetting through a reset torsion spring and using outer teeth and inner teeth of the driving disc and the driven disc as well as a stop device. In the present invention, the valve may be controlled to be stable at an appropriate position through the size of the current of the coil, so as to achieve a stepless speed and achieve a purpose of precisely controlling the clutch. | 02-05-2015 |
| 20150041278 | Pneumatically Actuated Decoupling Device - A pneumatic decoupling device for an electromechanical actuator, in particular, for flight applications includes a pressure accumulator housing for storing a compressed gas, which can be released to a decoupling mechanism of an electromechanical actuator for separating the drive components, so that in the event of a decoupling the electromechanical actuator runs totally freely. | 02-12-2015 |
| 20150096864 | ACTUATOR SYSTEM FOR HYDRAULIC ACTUATION - An actuator system for hydraulic actuation of a clutch comprises a master cylinder with a master piston, a readjustment container for containing hydraulic fluid, a connection opening between the readjustment container and the master cylinder, where a degree of openness of the connection opening is dependent on the position of the master piston, and a hydraulic actuator to control a position of the master piston. In an actuator system, a control device for controlling the hydrostatic actuator is also provided, such that a speed of motion of the master piston is high while the connection opening is wide open, and low while the connection opening is open a little. In a method according to the disclosure, a position of the master piston is detected, and the actuator is controlled at different speeds depending on the position or the degree of openness. | 04-09-2015 |
| 20150114790 | PUMP APPARATUS WITH SWITCHING VALVE AND DRIVING POWER TRANSMISSION DEVICE - A pump apparatus with a switching valve includes an actuator that is rotationally driven, a pump, a switching valve and a driving power interrupting device. The pump discharges a fluid sucked by rotational driving of the actuator. The switching valve is changed in phase by the rotational driving of the actuator so as to be switchable among a plurality of destinations of the fluid discharged from a pump chamber of the pump. The driving power interrupting device for a valve is switchable between a state where rotational driving power of the actuator is transmitted to the switching valve and a state where the rotational driving power of the actuator is interrupted. | 04-30-2015 |
| 20160003309 | HYDRAULIC CONTROL DEVICE AND HYDRAULIC CONTROL METHOD - A hydraulic control device that includes a pressure regulating valve capable of regulating a source pressure to generate a control pressure higher than the oil pressure in the circulation oil chamber and supplying the control pressure to the engagement port, wherein when disengaging the lockup clutch, the hydraulic oil is circulated in the circulation oil chamber via the circulation input port and the circulation output port, and part of the hydraulic oil circulated in the circulation oil chamber is supplied to the engagement port, and when engaging the lockup clutch, the supply of the hydraulic oil circulated in the circulation oil chamber to the engagement port is cut off, and the control pressure is supplied to the engagement port. | 01-07-2016 |
| 20160010699 | TORQUE CONVERTER CLUTCH CONTROL VALVE SYSTEM | 01-14-2016 |
| 20160040731 | ADD-ON AUTOMATIC CLUTCH DEVICE - This add-on automatic clutch device is to be added onto a vehicle having manual transmission and a clutch, and includes: a first hydraulic pipe having one end connected to a clutch master cylinder unit of the vehicle; a second hydraulic pipe having one end connected to a clutch release cylinder unit of the vehicle; a cylinder having a first port connected to the other end of the first hydraulic pipe and a second port connected to the other end of the second hydraulic pipe; a piston provided in the cylinder so as to be able to move back and forth; and a motor that generates drive power to cause the piston to move back and forth. A first port and a second port are disposed such that when the piston reaches the bottom dead center, oil can flow between the first hydraulic pipe and the second hydraulic pipe by the first port and the second port being connected through the cylinder. | 02-11-2016 |
| 20160097448 | Control of Transmission Latch Valve - A transmission includes a latch valve with latched and de-latched states. In the de-latched state, the latch valve directs a control pressure to a clutch apply circuit. In the latched state, which is entered in response to a control pressure higher than a latch pressure, the latch valve directs a line pressure to the clutch apply circuit. A controller manages the transition from latched to de-latched differently depending upon the transmission input torque and gear state. At high transmission input torque, the controller first reduces the control pressure to rapidly accelerate a spool in the latch valve, and then increases the control pressure to prevent clutch slip. At low torque, the controller reduced the pressure to an intermediate value during the transition and then reduces it again. At moderate torques, the controller reduces the pressure directly to a target pressure in a single step. | 04-07-2016 |
| 20160146271 | HYDRAULIC SYSTEM OF A VEHICLE POWERTRAIN - A vehicle powertrain hydraulic system ( | 05-26-2016 |
| 20160178018 | HYDRAULIC SYSTEM FOR AN AUTOMATIC TRANSMISSION | 06-23-2016 |
| 20180023636 | VIBRATION DAMPER FOR A HYDRAULIC CLUTCH ACTUATOR | 01-25-2018 |
