| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 475116000 | Fluid controlled mechanical clutch or brake | 74 |
| 20090192002 | AUTOMATIC TRANSMISSION - A second clutch (C | 07-30-2009 |
| 20120178572 | PLANETARY TRANSMISSION WITH LAUNCH CLUTCH - A transmission system is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members a plurality of torque transmitting devices, a launch clutch, and a hydraulic circuit. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. | 07-12-2012 |
| 20090156345 | Speed Changing Transmission Apparatus - A composite planetary transmission section (P) is provided for synthesizing output from a stepless speed changing section ( | 06-18-2009 |
| 20130072338 | Hydrodynamic Clutch Device - A wet clutch arrangement includes a housing arrangement which is filled or fillable with fluid, a first friction surface formation which is rotatable with the housing arrangement around an axis of rotation and a second friction surface formation which is rotatable with a driven member around the axis of rotation and which can be brought into frictional engagement with the first friction surface formation by a piston pump. At least a portion of a torsional vibration damping arrangement is provided in a torque transmission path and includes an input region and an output region. The torsional vibration damping arrangement further includes at least in a first torque transmission path a phase shifter arrangement for generating a phase shift of rotational irregularities transmitted via the first torque transmission path relative to rotational irregularities transmitted via a second torque transmission path. | 03-21-2013 |
| 20100279810 | Transmission Clutch Assembly - The present disclosure relates to a piston-actuated clutch assembly for a transmission. Interconnecting members are integrated into a pressure plate of the clutch assembly. The interlocking members are configured to selectively interlock the piston and the pressure plate. The location of the interlocking members reduces wear on the piston and other transmission components. | 11-04-2010 |
| 20100279811 | AUTOMATIC TRANSMISSION GEAR AND CLUTCH ARRANGEMENT - A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members. | 11-04-2010 |
| 20090264237 | Automatic transmission - A first element of a duplex planetary gear set is selectively coupled to an input shaft via a third clutch, or is selectively fixed via a first brake. A second element is selectively coupled, via a second clutch, to an intermediate shaft that is directly coupled to a speed-increasing element of a simplex planetary gear set which increases the rotational speed of the input shaft, or is selectively fixed via a second brake. A third element is directly coupled to an output shaft. A fourth element is selectively coupled to the input shaft via a first clutch. Therefore, by increasing the speed of the rotation of the input shaft by the simplex planetary gear set and transferring it to the duplex planetary gear set, it is possible to reduce the torques on individual components of an automatic transmission and therefore to reduce the sizes of the individual components and the capacities of the individual friction engagement elements. | 10-22-2009 |
| 20100144477 | A Continuous Variable Transmission Assembly - A variable ratio drive assembly ( | 06-10-2010 |
| 20110143876 | AUTOMATIC TRANSMISSION FOR A VEHICLE - A transmission for a vehicle with a clutch and/or a brake which is hydraulically actuated by a cylinder and a piston actuator. A pressure chamber is located between the cylinder and the piston and a hydraulic pressure medium flows into the pressure chamber via an inlet. The pressure medium is supplied to the pressure chamber via a component fixed on the housing, a rotary passage between the fixed component and the rotatable component and then via the rotatable component. The radial distance of the radial middle of the rotary passage is larger than the smallest radial distance and smaller than the largest radial distance of the pressure chamber from the rotation axis of a central shaft of the automatic transmission. The radial arrangement of the rotary passage, between the radially smallest and largest diameters of the pressure chamber, neutralizes centrifugally generated forces on the pressure medium in the pressure chamber. | 06-16-2011 |
| 20120077634 | FULLY-GEARED CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission (CVT) responsive to a device for supplying a rotational force. The transmission comprises a planetary gear system that further comprises: a control element, an output element, and an input element caused to rotate responsive to the device for supplying rotational force. The output element is engaged with the control element and the input element. The CVT further comprises a control module comprising a controllable brake connected to the control element for allowing the control element to rotate freely, for stopping the control element and for slowing the control element to a speed between free rotation and stopped. | 03-29-2012 |
| 20100240484 | METHOD AND DEVICE FOR CONTROLLING AN AUTOMATIC TRANSMISSION - The invention relates to a method for controlling an automatic transmission having a torque converter, with the transmission having three gear sets and with the first gear set which has a first brake clutch and a second brake clutch being braked relative to the housing by means of simultaneous actuation of the first and second brake clutches, as a result of which an output shaft which is directly connected to the first gear set is likewise braked. The third gear set is connected in terms of gearing to an input shaft and to the first gear set and can be fixed relative to the housing by means of a third brake clutch. The simultaneous actuation of the first and second brake clutches takes place at least intermittently with the third brake clutch in a slipping state, controlling the speed of the torque converter relative to the engine. | 09-23-2010 |
| 20090280944 | Speed Change Transmission Apparatus - Disclosed is an apparatus including a stepless speed change device receiving an engine drive; a planetary transmission device for, by a plurality of planetary transmission mechanisms, combining an output from the stepless speed change device and the engine drive not subject to a speed change by the stepless speed change device; and a speed range setting device for outputting the drive combined by the planetary transmission device and divided into a plurality of speed ranges. The planetary transmission device, the speed range setting device and a forward-reverse changeover device are located forwardly of a rear end of an upstream transmission case portion. An electric motor may be used instead of the stepless speed change device. | 11-12-2009 |
| 20100222173 | AUTOMATIC GEARBOX - The present invention relates to an automatic transmission ( | 09-02-2010 |
| 20110009222 | PLANETARY WHEEL END WITH PILOTED SUN GEAR SHAFT - A planetary wheel end assembly includes an axle shaft having an inboard end and an outboard end, a planetary gear assembly receiving driving input from the axle shaft, and a rotational support element that pilots the outboard end of the axle shaft. The planetary gear assembly includes a sun gear that is fixed for rotation with the axle shaft, a plurality of planet gears that are in meshing engagement with the sun gear, a non-rotating ring gear that is in meshing engagement with the planet gears, and a planetary spider that supports the plurality of planet gears. The planetary spider provides driving output to rotate a wheel component. The rotational support element is positioned radially between the outboard end of the axle shaft and planetary spider to allow relative rotation between the planetary spider and the outboard end of the axle shaft. | 01-13-2011 |
| 20110118072 | MOTOR TRANSMISSION APPARATUS - A motor transmission apparatus is provided between a transmission output shaft coupled to a drive wheel and a motor shaft coupled to a motor/generator. The motor transmission apparatus includes a first power transmission path that is switched to a power transmission condition by a high clutch having a clutch oil chamber, and a second power transmission path that is switched to a power transmission condition by a low brake having a brake oil chamber. Working oil discharged from an oil pump is guided to an oil passage switching valve via an output control valve. The working oil is distributed to one of the clutch oil chamber and the brake oil chamber by the oil passage switching valve, and therefore interlocking, in which the high clutch and the low brake are engaged simultaneously, can be avoided. | 05-19-2011 |
| 20090215567 | AUTOMATIC TRANSMISSION - An automatic transmission comprises a multi-plate brake to brake a specified rotational element of a transmission mechanism, which includes a plurality of frictional plates, a piston, a piston cylinder member comprising cylinder in which the piston slides, and oil-pressure chambers which are formed between the piston and the cylinder and bias the piston toward the frictional plates with an oil pressure supplied thereto, and a valve body to supply the oil pressure to the oil-pressure chambers. Herein, the valve body is provided in the vicinity of an outer periphery of the piston cylinder member so as to be connected to the piston cylinder member via a connection portion, and there is provided an oil passage to supply the oil pressure from the valve body to the oil-pressure chambers via the connection portion. | 08-27-2009 |
| 20120149519 | TRANSMISSION ASSEMBLY HAVING VARIABLE FORCE CLUTCH - A transmission assembly for a machine is disclosed. The transmission assembly may have a clutch pack, a first pressure chamber, and a second pressure chamber. The transmission assembly may also have a first piston configured to push against the clutch pack when pressurized fluid is directed into the first pressure chamber, and a second piston configured to push against the first piston when pressurized fluid is directed into the first pressure chamber and inhibited from pushing against the first piston when pressurized fluid is directed into the second pressure chamber. | 06-14-2012 |
| 20110053725 | AUTOMATIC TRANSMISSION GEAR AND CLUTCH ARRANGEMENT - A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members. | 03-03-2011 |
| 20090176612 | Method for Operating an Automatic Gearbox - A method for operating an automatic transmission of a motor vehicle, in particular a variable-speed automatic transmission. The automatic transmission has five shift elements and for transferring torque or force in a forward gear and in a reverse gear at least three of the five shift elements are engaged. In a neutral position of the automatic transmission, to prevent torque or force flow at least one of the shift elements that are engaged in the respective forward or reverse gear is fully disengaged. | 07-09-2009 |
| 20110190088 | SELF-CONTAINED HYDRAULIC TORQUE MODULATING DEVICE - A torque modulating coupling device for operatively linking two shafts has a clutch and a piston disposed in a case. The piston selectively applies force to the clutch in response to hydraulic pressure, and a keyed feature adapted to couple with a corresponding keyed feature associated with at least one of the shafts. The coupling device can be formed with two cases that form an enclosure for the clutch and the piston, trapping the piston forces between the cases. This embodiment allows the device to also act as an axle housing cover. In another embodiment, the case is designed to bolt directly to an axle housing cover, trapping piston forces between the case and the cover. | 08-04-2011 |
| 20100093477 | HYDRAULIC CLUTCH CONTROL MECHANISM FOR A MULTI-MODE HYBRID TRANSMISSION - An electrically variable transmission (EVT) selectively establishes various EVT modes and a neutral mode. The EVT includes a source of pressurized fluid, fluid-actuated clutches, various solenoid-actuated valves including trim valves and blocking valves adapted to control a flow of pressurized fluid to the clutches to establish the transmission operating modes, and an electronic control unit (ECU). The ECU actuates different combinations of the solenoid-actuated valves to establish the different transmission modes. The solenoid-actuated valves are configured in such a manner as to provide the EVT with one or more default operating modes in the event the ECU temporarily loses electrical power. Depending on the particular configuration, the default modes can be the neutral mode alone, or the neutral mode combined with one or more of the EVT modes, with the EVT modes enabled by providing one or both of the blocking valves with a latching feature. | 04-15-2010 |
| 20120220407 | CLUTCH PISTON SUPPORT - An assembly includes a clutch support formed with multiple cylinders, each cylinder connectable to a source of hydraulic pressure that actuates a clutch, and a planetary gearset including a ring gear driveably connected to the clutch support. | 08-30-2012 |
| 20120220406 | Gearset Carrier and Servo Cylinder Assembly - A carrier assembly includes a first plate, a second plate spaced from the first plate and formed with a cylinder, pinions supported on the first and second plates; and a piston located in the cylinder for displacement along an axis of the cylinder. | 08-30-2012 |
| 20110003660 | DRIVE ARRANGEMENT WITH OPEN LOOP HYDRAULIC MECHANISM OPERABLE AS A PUMP OR A MOTOR - A drive arrangement suitable for driving a final drive comprises a first drive means and a power-splitting gear arrangement. A first hydraulic mechanism is operable either as a pump or a motor. The first hydraulic mechanism is capable of being driven from the first drive means or from the final drive or both concurrently, acting through the gear arrangement. The final drive is drivable through the gear arrangement from the first drive means or the first hydraulic mechanism or both concurrently. | 01-06-2011 |
| 20120322604 | AUTOMATIC TRANSMISSION GEAR AND CLUTCH ARRANGEMENT - A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members. | 12-20-2012 |
| 20110275468 | TRANSFER INCORPORATING WET BRAKE - An object of the present invention is to provide a transfer incorporating a wet brake which, for example, enables a gear shaft for a second gear and a sun gear to be supported by two bearings without inconveniences such as an increase in the axial dimension of the transfer. Accordingly, a brake hub ( | 11-10-2011 |
| 20120100947 | METHOD AND APPARATUS EFFECTING TORQUE TRANSFER THROUGH A TRANSMISSION DURING ENGINE AUTOSTOP AND AUTOSTART EVENTS - A powertrain system includes an engine coupled via an input member to a transmission to transfer torque to an output member. The engine is configured to execute an autostop event and an autostart event during ongoing powertrain operation. The transmission includes a plurality of planetary gear sets and a plurality of torque transfer clutches. The plurality of torque transfer clutches includes hydraulically-activated clutches and mechanical clutch devices, including an electromechanically-activated selectable one-way clutch. The transmission is configured to provide hydraulic pressure to activate the hydraulically-activated clutches using only a mechanically driven hydraulic pump. The transmission is configured to effect torque transfer among the input member, the plurality of planetary gear sets and the output member in one of a plurality of fixed gear states by selectively activating at least one of the plurality of torque transfer clutches. | 04-26-2012 |
| 20100048339 | Triple-axle-drive variable transmission for heavy machinery - The present invention provides a triple-axle-drive multistage transmission for heavy machinery which is provided between a bevel gear unit and a differential gear unit and conducts multistage gear shifting operation, including three forward speeds and two reverse speeds. | 02-25-2010 |
| 20130012349 | GEAR TRAIN UNIT AND ARRANGEMENT FOR A STAMPING PRESS - The invention relates to a gear train unit comprising a plurality of planetary gear train stages, which are connected one after the other and which each comprise a ring gear ( | 01-10-2013 |
| 475117000 | Temperature responsive control | 2 |
| 20090118049 | SHIFT CONTROL APPARATUS OF AUTOMATIC TRANSMISSION - A shift control method and apparatus of an automatic transmission for controlling a shift from one speed, achieved by engagement of a first and a second frictional element, to another speed, achieved by engagement of a third and a fourth frictional element. The method includes detecting a rotation speed of a turbine, detecting a rotation speed of at least one operating member of at least one planetary gear set of the automatic transmission, and controlling the shift according to the rotation speeds of the turbine and the operating member. The control includes overlapping a first shift, fromn the one speed to an additional speed, with a second shift, from the additional speed to the other speed. The additional speed has a gear ratio that is near a gear ratio of the one speed. | 05-07-2009 |
| 20090312131 | CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - An automatic transmission includes: a frictional engagement element arranged to be switched from an engagement state to a disengagement state at a switching from a running range to a neutral range, and including: frictional plates; a first piston arranged to push the frictional plates; a second piston arranged to push the frictional plates; a first hydraulic chamber arranged to receive a hydraulic fluid for pushing the first piston; and a second hydraulic chamber arranged to receive a hydraulic fluid for pushing the second piston; a first discharge speed switching section arranged to switch only a discharge speed of the hydraulic fluid of the first hydraulic chamber; and a control unit configured to increase the discharge speed of the hydraulic fluid of the first hydraulic chamber during a predetermined time period by the first discharge speed switching section at the switching from the running range to the neutral range. | 12-17-2009 |
| 475118000 | Speed responsive control | 10 |
| 475119000 | Safety device | 1 |
| 20080318723 | HYDRAULIC CONTROL SYSTEM OF 8-SPEED AUTOMATIC TRANSMISSION FOR VEHICLES - A hydraulic control system of an eight-speed automatic transmission includes a first clutch/second clutch control portion controlled by a first proportional control solenoid valve and selectively supplying hydraulic pressure of a first pressure control valve to the first clutch or the second clutch; a third clutch control portion controlled by a second proportional control solenoid valve and supplying hydraulic pressure of a second pressure control valve to the third clutch; a fourth clutch/first brake control portion controlled by a third proportional control solenoid valve and selectively supplying hydraulic pressure of a third pressure control valve to the fourth clutch or the first brake, the fourth clutch/first brake control portion supplying reverse range pressure to the first brake at the reverse speed; and a second brake control portion controlled by a fourth proportional control solenoid valve and directly supplying hydraulic pressure of a fourth pressure control valve to the second brake. | 12-25-2008 |
| 475120000 | Pressure control | 3 |
| 20090209383 | Transmission Clutch Control Apparatus And Method - A method for controlling a clutch assembly includes controlling an actual clutch fill pressure using open-loop pressure controls when an active fill phase is detected, and using closed-loop pressure controls when the active fill phase is complete or when an overfill condition is detected. The method supplies the actual clutch pressure according to a second set of open-loop pressure controls when a step in commanded clutch pressure is detected. The method monitors a fill pressure and time during the step, and applies the clutch pressure according to the closed-loop pressure controls when either value equals a corresponding threshold value. A clutch assembly has a piston for compressing clutch disks to initiate a shift event, an algorithm for controlling the shift event, and a sensor for determining an actual clutch pressure during the shift phases. The algorithm switches between closed-loop and open-loop pressure controls in response to different shift phases. | 08-20-2009 |
| 20090075773 | METHOD AND APPARATUS TO DETECT A MODE-GEAR MISMATCH DURING OPERATION OF AN ELECTRO-MECHANICAL TRANSMISSION - A method for operating the powertrain includes monitoring operator inputs, monitoring a transmission output, and terminating an engine operating mode when a time-rate change in the transmission output exceeds a threshold absent a change in the monitored operator inputs. | 03-19-2009 |
| 20090111636 | ELECTROYHYDRAULIC CONTROL DEVICE OF A GEAR UNIT - An electrohydraulic control device ( | 04-30-2009 |
| 475121000 | Ratio change | 6 |
| 20090170650 | SHIFT CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - A shift control apparatus that disconnects and connects respective pairs of friction engagement elements during downshift to a speed spaced apart by two or more steps through an intermediate shift speed. A shift controller controls a hydraulic pressure of a second shift release element by feedback control, and in accordance with the increase in the torque capacity of the second shift release element, also controls the torque capacity of a first shift engagement element so as to be sufficiently higher than the amount of change in the torque capacity of the second shift release element. The occurrence of adverse consequences in which a shift shock is generated is effectively suppressed because a sufficient reaction force cannot be ensured during engagement switching due to insufficient torque capacity of the first shift engagement element, and since the second shift release element cannot be appropriately feedback-controlled, difficulty in control of rotation change results. | 07-02-2009 |
| 20110245005 | AUTOMATIC TRANSMISSION CONTROL DEVICE - A control device controlling a vehicle's automatic transmission. The automatic transmission engages first and second friction engagement elements by fluid pressure from a pump operating using motive power from the vehicle's motor when a shift position is at a reverse traveling position, places the first friction engagement element on standby at a predetermined pressure that is higher than a stroke starting pressure by which a piston stroke is started and lower than a complete engagement pressure or engages the first friction engagement at the complete engagement pressure when the shift position is at a non-traveling position, and engages a third friction engagement element as a starting shift speed when the shift position is at a forward traveling position. When the shift position is at the forward traveling position, the first friction engagement element is placed on standby at the predetermined pressure if a vehicle speed is lower than a predetermined vehicle speed, or releases the predetermined standby pressure if the vehicle speed is equal to or higher than the predetermined vehicle speed. | 10-06-2011 |
| 20080214350 | PRESSURE ASSISTED PARK SERVO - A pressure assisted park servo assembly for an automatic transmission includes a servo or spool valve which receives pressurized hydraulic fluid from various sources including two solenoid valves and transmission ports. The servo valve controls two flows of pressurized hydraulic fluid to a servo assembly to place the transmission in or release it from park. The improved park servo assembly exhibits enhanced operating speed. | 09-04-2008 |
| 475122000 | Speed responsive valve control | 3 |
| 475123000 | Electrical control | 3 |
| 20090280945 | Transmission apparatus - A transmission apparatus is disclosed for transmitting power from a motor for driving an airport ground support tractor. The transmission apparatus includes a housing which has an input end and an output end, the housing defining a transmission enclosure. A torque converter is disposed within the housing, the torque converter having an input driven by the motor and an output for transmitting torque from the motor. An input shaft is rotatably supported within the housing, the input shaft having a first and a second extremity. The first extremity of the input shaft is driven by the output from the torque converter. A planetary gear train intermeshes with the input shaft, the gear train being disposed between the first and second extremities of the input shaft. A planetary gear train support is provided for rotatably supporting the planetary gear train. A casing is disposed coaxially relative to the input shaft, the casing intermeshing with the gear train and the input shaft is rotated in a first rotational direction. The planetary gear train is structured such that in a first mode of operation, when the input shaft is rotated in the first rotational direction, the casing is rotated in the first rotational direction. However, in a second mode of operation, when the input shaft is rotated in the first rotational direction, rotation of the casing relative to the housing is inhibited so that the planetary gear train support rotates in the second rotational direction. A main shaft has a driven end and a driving end, the main shaft being rotatably supported by the housing. The arrangement is such that the driven end of the main shaft is secured to the planetary gear train support so that the support selectively drives the main shaft in the first rotational direction and the second rotational direction. An output shaft has a first end and a second end. The output shaft is rotatably supported by the housing such that the output shaft is disposed coaxially relative to the main shaft so that the output shaft is selectively driven by the driving end of the main shaft. A first gear wheel defines a splined bore, the splined bore intermeshing with an external spline defined by the main shaft. The arrangement is such that, when the main shaft is rotating, the external spline and intermeshing splined bore cooperate for rotating the first gear wheel. A lay shaft is disposed within the enclosure, the lay shaft having a longitudinal axis disposed spaced and parallel relative to a rotational axis of the main shaft. A gear assembly is disposed within the enclosure such that the gear assembly is supported by the lay shaft for rotation thereof about the longitudinal axis. The gear assembly defines a driven gear and a driving gear which is disposed axially relative to the driven gear. The driven gear intermeshes with the first gear wheel such that when the first gear wheel rotates about the rotational axis of the main shaft, the intermeshing driving gear is rotated about the longitudinal axis of the lay shaft for rotating the gear assembly including the driven gear. A second gear wheel intermeshes with the driven gear, the second gear wheel defining a bore for the rotatable reception therein of the output shaft. A synchro device is operably disposed between the first and second gear wheels such that, in a first disposition of the synchro device, the motor rotates the main shaft which drives the first gear wheel for rotating the gear assembly for rotating the second gear wheel. The synchro device drivingly connects the second gear wheel to the output shaft so that a first gear ratio is established between the input and the output shafts. In a second disposition of the synchro device, the motor rotates the main shaft and the synchro device drivingly connects the main shaft to the output shaft and disconnects the second gear wheel from driving connection to the output shaft so that a second gear ratio is established between the input and the output shafts. An electro-hydraulic actuator is operatively connected to the synchro device for selectively moving the synchro device between the first and second dispositions thereof for selectively establishing the first and second gear ratios. | 11-12-2009 |
| 20090088281 | AUTOMATIC TRANSMISSION - An automatic transmission is provided. One embodiment of the automatic transmission may include a valve body including control valves for hydraulically controlling a friction engaging element provided within said transmission. The automatic transmission may further include an electric control unit located on said valve body for controlling gear shifting of said automatic transmission. The automatic transmission may further include a transmission case having a peripheral wall for at least partially enclosing a gear shift mechanism and an outer wall provided adjacent to said peripheral wall, wherein said electric control unit is located within a containing space surrounded by said peripheral wall, said outer wall and said valve body. | 04-02-2009 |
| 20080227580 | AUTOMATIC TRANSMISSION AND METHOD OF PREVENTING OVER-REVOLUTION OF THE SAME - An automatic transmission comprising a plurality of planetary gears disposed between an input shaft and an output shaft and having a plurality of rotational elements, a plurality of frictional elements selectively engaged and released for controlling rotations and connections of the plurality of rotational elements in accordance with instructions so as to realize a plurality of gear positions, rotational speed detecting means for detecting a rotational speed of a predetermined one of the plurality of rotational elements, other than the input shaft and the output shaft, and frictional element release means for releasing all of the plurality of frictional elements when it is judged that the rotational speed of the predetermined one of the plurality of rotational elements is higher than a predetermined rotational speed. | 09-18-2008 |
| 475125000 | Torque responsive control | 1 |
| 20090247344 | SHIFT CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - Strain gauges and a torque value calculating unit detect a value for torque acting on a sun gear, based on a reaction force. A torque phase detecting unit detects start of a torque phase at which only torque distribution changes while a gear ratio stays at the same level as before upshift, based on a change in the value for torque detected by the strain gauges and the torque value calculating unit. Consequently, when upshifting, an end of a piston stroke can be accurately determined by precisely detecting the torque phase during the shifting. Thus, problems such as burning of friction materials due to excessive heat generation in friction engagement elements can be eliminated. | 10-01-2009 |
| 475127000 | Pressure regulation | 13 |
| 20100137093 | Automatic Transmission with Closed Loop Pressure Electro-Hydraulic Control Module - An automatic transmission is disclosed that includes a clutch pressure control module housing having therein:
| 06-03-2010 |
| 20090011888 | AUTOMATIC TRANSMISSION HYDRAULIC PRESSURE CONTROL APPARATUS - An automatic transmission hydraulic pressure control apparatus decreases a hydraulic pressure lower limit value as much as possible without causing a non-operating zone of a solenoid valve to be included in a control region of the solenoid valve due to product variation. First and second determinations are alternately performed to determine if a solenoid command value is in a non-operating zone by alternately changing the solenoid command value to decrease and increase the actual hydraulic pressure in a step-like manner. The solenoid command value of an immediately previous cycle in which the first determining section determined that the solenoid command value was not in the non-operating zone is set as a solenoid command limit value when one of the first and second determining sections has determined that the solenoid command value is in the non-operating zone. | 01-08-2009 |
| 20080207375 | Hydraulic control apparatus for automatic transmission, and hybrid drive system provided with the same - A hydraulic control apparatus includes a switching device that switches between a hydraulic servo of the plurality of hydraulic servos of the first friction engaging element and a hydraulic servo of the plurality of hydraulic servos of the second friction engaging element so as to supply a control pressure from the one pressure regulating solenoid valve to each of the plurality of hydraulic servos, wherein the switching enables a control of an engagement and disengagement of the first friction engaging element and the second friction engagement element using the one pressure regulating solenoid valve. | 08-28-2008 |
| 20090286643 | COMBINATION CONTINUOUSLY VARIABLE TRANSMISSION AND PLANETARY TRANSMISSION - A modular assembly of a transmission is provided in which a continuously variable transmission module is separable from a planetary transmission module. When connected, the two modules function as a single transmission. The two modules are connectable in multiple orientations relative to each other. A single fluid source can be provided for operation of the two modules. | 11-19-2009 |
| 20090143180 | Hydraulic control device for automatic transmission - A hydraulic control device for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switching valve, and a hydraulic pressure supply switching valve. A second friction engagement element is engaged at high speed side shift speeds, a low speed that is one of low speed side shift speeds is achieved by engagement of a first friction engagement element and a third friction engagement element, and a high speed that is one of the high speed side shift speeds is achieved by engagement of a second friction engagement element and the third friction engagement element. | 06-04-2009 |
| 20110130237 | MANUAL VALVE CONTROL FOR MULTI-SPEED PLANETARY TRANSMISSION - A manual valve control for a multi-speed vehicle transmission is provided. Electronic and hydraulic components are provided, including trim valve systems that are multiplexed by a shift valve and a manual valve. The trim valves and shift valve are self-diagnosing via a plurality of multiplexed pressure switches. The control enables single and double range shifts among the multiple forward speed ratios, including shifts to and from sixth and higher forward ratios, reverse and neutral. The control also includes a reduced engine load at stop feature. In addition, a power off/limp home feature provides a plurality of failure modes, including a failure mode for sixth and higher forward speed ratios. | 06-02-2011 |
| 20090203480 | DEVICE FOR CONTROLLING A FLUID-ACTIVATED DOUBLE-ACTION OPERATING CYLINDER - A device for controlling a fluid-actuated, double-action operating cylinder ( | 08-13-2009 |
| 20110136608 | HYDRAULIC CONTROL SYSTEM OF POWER TRAIN FOR HYBRID VEHICLE - The present invention provides a hydraulic control system of a power train for a hybrid vehicle that allows the power train of a hybrid vehicle to implement all of two or more EV modes, two or more power split modes, and at least three or more fixed-stage modes, with a relatively simple configuration, and achieves satisfactory power performance of the power train and fuel efficiency and reduce the cost of the valve body, remove possibility of malfunction, and implements a limp home function when a controller is broken. | 06-09-2011 |
| 475128000 | Valving controls shift timing | 5 |
| 20090082153 | Driving device - In a driving device that includes a mechanical oil pump operated by power of an engine and a motor oil pump EOP operated by power of a motor, provided in parallel with each other, and check valves on discharge sides of the pumps, and pumps oil from any of the pumps and supplies the oil to a clutch included in a transmission, a through hole | 03-26-2009 |
| 20090143181 | Hydraulic control apparatus for automatic transmission - In a condition of a vehicle which remains stationary or is about to stop and of a forward second speed having a clutch and a brake engaged, an N range is changed from a D range based on a shift lever operation and a forward range pressure is discharged from a manual shift valve. At this time, an orifice and a check ball are used to delay discharge of oil paths which communicate with a linear solenoid valve relative to discharge of an oil path a | 06-04-2009 |
| 20090312132 | HYDRAULIC CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - A hydraulic control apparatus for an automatic transmission, including a sequential shift control means for performing sequential shift control in a case where it is necessary to execute the second shift during execution of the first shift. The sequential shift control includes starting reduction of hydraulic fluid pressure in the third friction element when a parameter that varies in accordance with a degree of progress of the first shift has reached a predetermined value, and performing piston stroke control that includes outputting a high hydraulic pressure command as a hydraulic fluid pressure to the second friction element when the selector valve is switched from the second position to the first position, and subsequent to completion of outputting of the high hydraulic pressure command, outputting a low hydraulic pressure command that is lower than the high hydraulic pressure command. | 12-17-2009 |
| 20090017952 | VALVE TIMING CONTROL APPARATUS - A first rotary member rotates with a crankshaft and has a first gear. A second rotary member rotates with a camshaft and has a second gear that is axially shifted from the first gear. A planetary rotary member has third and fourth gears, which are eccentrically meshed respectively with the first and second gears to perform a planetary motion. A biasing member is interposed between the planetary rotary member and a planetary carrier, which supports the planetary rotary member. The planetary rotary member is in contact with the biasing member at a contact portion having an axial center. The axial center is located on a radially inner side of a meshed portion between the second and fourth gears, which has a backlash larger than that of a meshed portion between the first and third gears. | 01-15-2009 |
| 475129000 | With fluid accumulator | 1 |
| 20100048340 | AUTOMATIC TRANSMISSION DAMPER MECHANISM - An automatic transmission damper mechanism provided between a first hydraulic passage ( | 02-25-2010 |
| 475131000 | Manually actuated ratio selector | 2 |
| 20090258746 | MANUAL VALVE CONTROL FOR MULTI-SPEED PLANETARY TRANSMISSION - A manual valve control for a multi-speed vehicle transmission is provided. Electronic and hydraulic components are provided, including trim valve systems that are multiplexed by a shift valve and a manual valve. The trim valves and shift valve are self-diagnosing via a plurality of multiplexed pressure switches. The control enables single and double range shifts among the multiple forward speed ratios, including shifts to and from sixth and higher forward ratios, reverse and neutral. The control also includes a reduced engine load at stop feature. In addition, a power off/limp home feature provides a plurality of failure modes, including a failure mode for sixth and higher forward speed ratios. | 10-15-2009 |
| 20120094797 | HYDRAULIC CONTROL SYSTEM OF CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE - A hydraulic control system of a continuously variable transmission for a vehicle reduces cost and improves quality reliability by adding switch valve function to a manual valve. The hydraulic control system may control a first brake operated at a first forward speed, a first clutch operated at a second forward speed, and a second brake operated at a reverse speed. The first clutch and the second brake may be operated by operation pressure controlled by a first proportional control solenoid valve and supplied through a manual valve, and the first brake may be operated by operation pressure controlled by a second proportional control solenoid valve, wherein the second proportional control solenoid valve controls hydraulic pressure received from the manual valve to be supplied to the first brake as the operation pressure. | 04-19-2012 |
| 475136000 | With ancillary pump or governor drive | 3 |
| 20080242464 | Electric oil pump control apparatus for vehicle, electric oil pump control method for vehicle, and shift apparatus - When the shift position is changed to the drive position, the amount of oil that is supplied to an automatic shift unit is increased by a larger amount as the standby hydraulic pressure is lower. Therefore, even if the standby hydraulic pressure is decreased, the required hydraulic pressure is more easily achieved when the shift position is changed to the drive position. Therefore, it is possible to decrease the standby hydraulic pressure without slowing down the response to the automatic shift unit to the hydraulic pressure and reducing the useful life of the automatic shift unit. Thus, the amount of electricity consumed by the electric oil pump is reduced. As a result, it is possible to enhance the fuel efficiency. | 10-02-2008 |
| 20120129640 | AUTOMATIC TRANSMISSION GEAR AND CLUTCH ARRANGEMENT - A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members. | 05-24-2012 |
| 475137000 | Plural pumps | 1 |
| 20110124459 | POWER TRANSMISSION APPARATUS - A power transmission apparatus mounted on a vehicle is provided with a motor that transmits power from the motor to an axle through a friction engagement element. The power transmission apparatus is further configured with a mechanical pump that pressure-feeds a fluid to a fluid pressure servo for the friction engagement element, and an electric pump that pressure-feeds the fluid to the fluid pressure servo of the friction engagement element. Furthermore, a lubrication supply passage is configured to connect to a flow passage extending from the electric pump to the fluid pressure servo. A first valve switches between opening and closing the lubrication supply passage such that, during a stop of the motor, so as to supply the fluid to the fluid pressure servo when in a driving position, and to the component to be lubricated when shifted to a neutral position. | 05-26-2011 |
| 475138000 | With positive clutch or brake | 4 |
| 20100248884 | Transmission for an Electrically Powered Vehicle - A simple, lightweight transmission for use in an electrically powered vehicle is disclosed. The transmission is symmetric in both weight and power distribution, and provides two input-to-output gear ratios, a neutral setting, and a park setting. A single “dog” clutch operates in splined relationship with a first shaft, and a single planetary gear assembly is connected to a second shaft. Sliding the dog clutch among four positions serves to shift the transmission among direct shaft engagement for direct drive, engagement through the planetary gear assembly for overdrive, disengagement for neutral, and double engagement for park. Preferred embodiments include reduction gears in the planetary gear assembly. Other embodiments include a synchronizer so as to synchronize the shaft rotation speeds when they are not exactly matched. Further embodiments include a dual-servo shift mechanism that prevents shifting into park unless a park servo is in its park position. | 09-30-2010 |
| 20120083374 | ARRANGEMENT COMPRISING AT LEAST ONE DOG CLUTCH - An arrangement which comprises at least one claw clutch that can be connected to at least one component of a transmission, such that the claw clutch is arranged substantially within a bearing support ( | 04-05-2012 |
| 20120083373 | ARRANGEMENT COMPRISING AT LEAST ONE DOG CLUTCH - An arrangement which comprises at least one claw clutch for the shiftable coupling and decoupling of a shaft ( | 04-05-2012 |
| 20130017919 | Transfer Case with Planetary Gear Range ShiftingAANM Klemm; LauraAACI Shelby TownshipAAST MIAACO USAAGP Klemm; Laura Shelby Township MI USAANM Gady; RichardAACI Rochester HillsAAST MIAACO USAAGP Gady; Richard Rochester Hills MI USAANM Starna; MatthewAACI New BaltimoreAAST MIAACO USAAGP Starna; Matthew New Baltimore MI USAANM Khoryshev; AlekseyAACI TroyAAST MIAACO USAAGP Khoryshev; Aleksey Troy MI US - A transfer case having a planetary gear set, a clutch collar, and an actuator. The actuator is configured to actuate the clutch collar between a low speed range position in which the clutch collar engages a planet gear carrier of the planetary gear set, and a high speed range position in which the clutch collar engages a sun gear of the planetary gear set. | 01-17-2013 |
| 475140000 | Spring engaged, fluid released clutch or brake device | 2 |
| 20110287884 | PARKING MECHANISM FOR TRANSMISSION - A parking mechanism of a transmission with a planetary gear mechanism for speed changing and outputting the rotation of a driving force source, includes a plurality of friction elements which change a speed ratio of the planetary gear mechanism by being engaged or released; and an engaging unit which engages the friction elements. The engaging unit maintains at least two interlock friction elements, which are engaged to interlock the transmission, out of the plurality of friction elements in engaged states when the operation of the driving force source stops due to a key-off operation. | 11-24-2011 |
| 20100160103 | CLUTCHING METHOD AND MECHANISM FOR ELECTRICALLY VARIABLE TRANSMISSIONS - An electrically variable transmission includes an input member, an output member, two planetary gear sets, two electric motors, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include a rotating clutch and a brake. The rotating clutch and the brake share a common fixed connection. The rotating clutch is released by a stationary actuator that engages a rotatable release plate. The actuator is engaged to release the rotating clutch when the brake is engaged. | 06-24-2010 |
| 475144000 | Fluid controlled one-way devices | 4 |
| 20090312133 | Compact transmission preventing a vehicle from moving backward on a slope - A compact transmission includes a clutch unit for controlling power transmitted from a bevel gear unit coupled to an output shaft of an engine. The clutch unit includes a subsidiary forward clutch part including friction plates coupled to an inner peripheral surface of an axle housing of the clutch unit; a subsidiary coupling coupled to a backward coupling through a one-way bearing; friction disks coupled to an outer peripheral surface of the subsidiary coupling, the friction plates and the friction disks being arranged alternately; and a piston disposed on one side of the friction plates and the friction disks. When a vehicle moves backwardly on an upward slope, an application of hydraulic pressure to a forward clutch part is interrupted and hydraulic pressure is applied to the subsidiary forward clutch part, so that the piston is moved by the hydraulic pressure to compress the friction plates and the friction disks, thereby fixing the subsidiary coupling to the axle housing. | 12-17-2009 |
| 20100022342 | Front Wheel Drive Automatic Transmission with a Selectable One-Way Clutch - A vehicle includes a front-wheel drive (FWD) transmission having a case, a selectable one-way clutch (SOWC) indexed to the case, pressurized fluid, and a valve body assembly (VBA). The VBA has a piston in communication with the fluid, a return spring, and an actuator plate in continuous contact with or connected to each of the piston and a shift lever of the SOWC. Fluid moving the piston and plate in one direction locks the SOWC to enable a reverse mode, and the spring moves the piston and the plate in another direction to unlock the SOWC in a forward mode. A method prevents spin losses in the FWD transmission by positioning a two-mode SOWC within a case, positioning a VBA adjacently and externally to the case, and admitting pressurized fluid into the VBA to engage the SOWC only during a reverse operating mode. | 01-28-2010 |
| 20120115663 | SELECTABLE ONE-WAY CLUTCH WITH BREAKAWAY FEATURE - A selectable overrunning clutch and breakaway, i.e., energy absorbing, cone clutch is disposed in series between two elements of a planetary gear automatic transmission. An annular piston is received within a complementary cylinder and includes a male cone clutch member that mates with a stationary female cone clutch member. Also carried by the annular piston is an annular drive ring which engages a planetary gear assembly element such as a ring gear. Disposed between the drive ring and the piston is a selection ring having a plurality of circumferential apertures or ports that receive a like plurality of struts. The face of the annular piston includes pockets or recesses that receive the struts and the face of the drive ring includes notches or surfaces against which the struts engage. Tangentially disposed in the annular piston is a small selection piston which rotates the selection ring between two positions to either allow overrunning in one direction between the annular piston and the annular drive ring or lock the two components together. | 05-10-2012 |
| 20120220408 | Mechanism for Controlling a Transmission Component - A transmission latching mechanism includes a component of a transmission gearset, a member secured to and able to rotate with the component, and a piston fixed against rotation and moveable alternately to latch the mechanism, thereby holding the member against rotation and to unlatch the mechanism, thereby releasing the member to rotate. | 08-30-2012 |
| 475146000 | Fluid motor structure | 4 |
| 20100075794 | TRANSMISSION ACTUATION SYSTEM - A transmission system without dynamic seals, specifically, an actuator for a vehicle transmission including a first rotating clutch pack engageable with a planetary gearset a first non-rotating actuator piston for engaging the clutch pack and a first bearing for isolating a first rotation of the clutch pack from the piston. A transmission system is provided using an electromechanical system for shifting the clutches, allowing a smaller pump only for lubrication of the transmission and the torque converter flow. | 03-25-2010 |
| 20100099533 | PLANETARY POWER TAKE OFF DEVICE - A power take off device includes input and output shafts and an integral planetary gear set. The power take off device may be a single speed or a two speed device. The input shaft and the output shaft are mechanically connected through the planetary gear set. In one mode of operation of the power take off device, a substantial speed reduction and torque increase is provided between the input shaft and the output shaft. The power take off device may change to a second mode of operation without stopping to provide a direct one to one speed and torque ratio between the input shaft and the output shaft. A planetary gear set clutch unit includes a two direction actuator that provides fluid pressure actuation and release of the clutch unit with a single input signal. | 04-22-2010 |
| 20090253544 | Hydraulic Clutch Control System - A transmission includes two blocking valves that control fluid pressure to a plurality of clutches. The blocking valves are characterized by a plurality of states that result in at least three transmission operating conditions. Each of the three operating conditions is characterized by fluid pressure being unavailable to a respective one of the plurality of clutches. | 10-08-2009 |
| 475148000 | With one-way device | 1 |
| 20100022343 | Rear Wheel Drive Automatic Transmission with a Selectable One-Way Clutch - A vehicle includes a rear-wheel drive (RWD) automatic transmission having a stationary member, a two-mode selectable one-way clutch (SOWC), pressurized fluid, and a valve body assembly (VBA). The VBA has a piston, a return spring, and an actuator linkage in contact with the piston and a shift lever of the SOWC. Fluid moves the piston and linkage in one direction to lock the SOWC and enable a reverse mode having no spin losses, and the spring moves the piston and linkage in another direction to unlock the SOWC in a forward mode. A method reduces spin losses by admitting fluid into the VBA to move the piston in one direction to thereby rotate the shift lever of the SOWC to one angular position to lock a driving member of the transmission to the stationary member during reverse, engine braking first gear, and manual low speeds. | 01-28-2010 |
