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| Number | Title | Issue Date |
| 7712594 | Dual clutch arrangement for a dual clutch transmission Dual clutch arrangement for a dual clutch transmission. The dual clutch arrangement has a housing, an input shaft, a first friction clutch, a second friction clutch, two output shafts, a hub which is fixed to the housing, a first piston/cylinder arrangement which is... | 05/11/2010 |
| 7690491 | Twin-clutch device A twin-clutch device includes first and second clutch actuating mechanisms; a first clutch disconnection/connection control mechanism for exerting on the first clutch actuating mechanism a controlling force for switching disconnection/connection of the first clutch ... | 04/06/2010 |
| 7648012 | Dual clutch arrangement A dual clutch arrangement for a dual clutch transmission for motor vehicles, having a first and a second friction clutch which are each fluidically actuable. A first piston arrangement serves to actuate the first friction clutch and has a first piston, a first pisto... | 01/19/2010 |
| 7637363 | Clutch device for automatic speed changer A clutch device for an automatic transmission includes a clutch drum, first and second frictional coupling elements, both supported by the clutch drum, a first piston axially movably disposed radially outwardly of the clutch drum and operating to couple the first fr... | 12/29/2009 |
| 7571794 | Hydraulic clutch actuation system A hydraulic clutch actuation system having a hydraulic clutch control device which includes at least one clutch master cylinder that communicates via a pressure-medium line with a clutch slave cylinder used for actuating a clutch device, the pressure prevailing in t... | 08/11/2009 |
| 7549523 | Friction apply device of an automatic transmission A second clutch piston formed of a plurality of members including a cylindrical cylinder member, a disc-shaped bottom plate member that fits in one end portion of that cylinder member, and a snap ring, has a plurality of long positioning protrusions provided on an i... | 06/23/2009 |
| 7527136 | Actuating arrangement in a transmission for two pressure medium-actuatable shift elements An activation assembly in a transmission for two pressure-activated friction shifting elements positioned immediately behind each other axially, basically on the same radial transmission diameter and are constructed as a disc coupling or a disc brake, each of which ... | 05/05/2009 |
| 7497312 | Clutch assembly A clutch assembly for use in a transmission of a motor vehicle is provided including, a stationary frame, a non-rotating apply piston mounted with the frame, a clutch hub torsionally connected with a portion of a friction pack, a clutch housing torsionally connected... | 03/03/2009 |
| 7445108 | Dual clutch transmission with radially nested clutches having a common disk carrier A dual clutch transmission having radially nested clutches including an outer clutch having first inner and outer clutch disks that are interleaved between each other where the first outer clutch disks are operatively mounted to a first outer support carrier. The tr... | 11/04/2008 |
| 7416069 | Clutch arrangement in an automatic transmission having an installation space-saving coolant supply A clutch arrangement in an automatic transmission, comprising two axially adjacent multi-disk clutches (B, E) to each is assigned a piston/cylinder arrangement for axially actuating the clutch, a pressure compensation space for a dynamic clutch actuation pressure co... | 08/26/2008 |
| 7392890 | Torque transmitting unit A torque transmitting unit in the power train of a motor vehicle for transmitting torque between a drive unit having an output shaft and a transmission having at least one input shaft. A clutch is positioned between the transmission input shaft and the drive unit ou... | 07/01/2008 |
| 7370745 | Hydraulic clutch-release system A hydraulic clutch-release system has a dual-piston clutch actuator for actuating a twin clutch of an automated manual transmission of a vehicle. The actuator has pistons disposed coaxially with one another in a housing. The pistons are accommodated movably relative... | 05/13/2008 |
| 7350635 | Hydraulic double clutch Hydraulic double clutch is provided that includes fluidically interconnected balancing chambers that are associated with a first and a second clutch piston. ... | 04/01/2008 |
| 7350633 | Apply piston for a power transmission An apply piston for a torque-transmitting mechanism in a power transmission includes a first circumferential periphery and a second circumferential periphery radially inward of the first circumferential periphery and axially displaced therefrom. The apply piston has... | 04/01/2008 |
| 7341134 | Clutch and brake unit A clutch and/or brake unit is described with at least three components that can rotate relative to each other, each of which is connected, fixed against rotation, with at least one disk. The disks can selectively be brought into frictional engagement, friction locke... | 03/11/2008 |
| 7322455 | Torque transmitting unit A torque transmitting unit in the power train of a motor vehicle for transmitting torque between a drive unit having an output shaft and a transmission having at least one input shaft. At least one clutch unit is positioned between the drive unit and the transmissio... | 01/29/2008 |
| 7320391 | Alternative pack designs for multidisk clutches A method and apparatus reduces hot spotting in transmission clutch packs actuated by a piston with axial fingers engaging the clutch pack. The method and apparatus combine an alternative pack arrangement with the fingered actuator, the alternative pack preferably be... | 01/22/2008 |
| 7318512 | Dual clutch transmission with radially nested clutches having a common disk carrier A dual clutch transmission having radially nested clutches includes an outer clutch having a plurality of first outer clutch disks, a plurality of first inner clutch disks, and a first inner support carrier, with the first inner clutch disks operatively mounted to t... | 01/15/2008 |
| 7311187 | Dual clutch transmission clutch cooling circuit A hydraulic circuit for controlling the application of pressurized cooling fluid to the clutches of a dual clutch transmission including a cooling unit in fluid communication with a source of the pressurized cooling fluid and adapted to exchange heat from the coolin... | 12/25/2007 |
| 7300375 | Hydraulic circuit for the control of a drive train A hydraulic circuit for the control of a double clutch transmission which has two transmission groups, each with an isolating clutch and with a plurality of shift clutches for the engagement and disengagement of gear steps, the hydraulic circuit having for each tran... | 11/27/2007 |
| 7293637 | Modular twin clutch transmission input for hybrid vehicle An assembly for transmitting power from two power sources, such as an internal combustion engine and an electric motor having a rotor, to a transmission input shaft includes a clutch hub driveably connected to the rotor, a first clutch secured to the clutch hub for ... | 11/13/2007 |
| 7287634 | Torque transmitting unit and drive train for it The invention relates to a torque transmission device, especially for a drive train comprising an internal combustion engine and a twin-clutch transmission having two transmission input shafts and one transmission output shaft, each transmission input shaft being co... | 10/30/2007 |
| 7278523 | Dual clutch transmission with axially parallel clutches having an improved backing plate assembly A dual clutch transmission with an axially parallel clutches that includes a disc support having a first circumferential groove, a backing plate having a corresponding second circumferential groove, and an annular spring element adapted to concurrently fit within th... | 10/09/2007 |
| 7278525 | Internally and externally splined clutch hub for torque-transmitting mechanisms in a power transmission A transmission assembly in accordance with the invention includes a plurality of torque-transmitting mechanisms. A hub member of the assembly includes a radially extending wall, and a circumferentially extending wall formed integrally with the radially extending wal... | 10/09/2007 |
| 7267215 | Actuating device for transferring a control piston force of an engaging/disengaging device to a double clutch An actuating device for transferring a control force of an engaging/disengaging device to a double clutch for coupling a drive shaft to two transmission input shafts is described. The actuating device includes at least two first pistons corresponding to the first cl... | 09/11/2007 |
| 7258217 | Frictional engagement structure using multiple disks A frictional engagement structure includes a first drum arranged at the inner periphery of a transmission casing, a second drum arranged at the inner periphery of the first drum, first friction plates splined to the casing or the first drum, second friction plates s... | 08/21/2007 |
| 7258212 | Oil pressure control device for automatic transmission In an automatic transmission having multiple oil pressure control valves for controlling friction engagement elements, a first and second pressure modulating valves are provided between an oil pressure generating means (pump) and the oil pressure control valves. A s... | 08/21/2007 |
| 7249665 | Double clutch A double clutch for a transmission with two transmission input shafts is disclosed having two clutches which can rotate about a common rotational axis, are arranged one behind the other in the axial direction, and have a common driving outer plate support and which ... | 07/31/2007 |
| 7247114 | Automatic transmission A forward/reverse change-over mechanism (3) of an automatic transmission comprises a forward clutch (5) inside a drum (7) with the base (7c) which rotates together with an input shaft (1). The forward clutch (5) engag... | 07/24/2007 |
| 7246692 | Dual clutch mechanism for a transmission A dual clutch mechanism includes an input shaft, a first output shaft and a second output shaft. The input shaft is axially spaced from the first and second output shafts, which can allow for a decreased diameter of the dual clutch mechanism. Axially spacing the inp... | 07/24/2007 |
| 7246693 | Support housing for torque-transmitting mechanisms in a power transmission A piston support housing for a transmission assembly includes a plurality of axially-extending finger portions engaging a plurality of spline portions formed in a corresponding transmission case, and a plurality of friction plates are assembled adjacent the piston s... | 07/24/2007 |
| 7232022 | Clutch-purpose hydraulic servo In a hydraulic servo for a clutch, a cancel plate is disposed on a second clutch drum that undergoes the same rotation as a second clutch drum provided with a cylinder portion, in such a fashion that the cancel plate is restricted from moving to a side opposite from... | 06/19/2007 |
| 7226380 | Automatic speed changer A second planetary gear unit PR and a clutch C1 for outputting reduced speed rotation are located on one axial side of a first planetary gear unit PU, with an output unit located therebetween. A clutch C2 which connects/disconnects an input shaft 2 | 06/05/2007 |
| 7211017 | Inter-axle differential lock shift mechanism An improved inter-axle differential locking clutch is provided that aligns the actuator and the clutch member thereby reducing space and material requirements in the axle assembly housing. The clutch also eliminates the need for a pushrod and shift fork thereby redu... | 05/01/2007 |
| 7207922 | Motor vehicle comprising a drive train having a multiple clutch drive A power train for a motor vehicle is configured with a control unit operable to increase or decrease the flow of operating fluid as a function of the instantaneous demand for the supply of the operating fluid to at least one of multiple clutch arrangements in such a... | 04/24/2007 |
| 7189182 | Transmission clutch control system A power transmission includes a rotary input member adapted to receive drive torque from a source of torque, a rotary output member and a torque transmitting mechanism selectively operable to transfer drive torque between the input member and the output member. The ... | 03/13/2007 |
| 7182194 | Low power modulating clutch control system with combination accumulator and piston actuator A power transmission device includes a rotary input member receiving drive torque from a source of torque, a rotary output member for providing drive torque to an output device and a torque transfer mechanism for transferring drive torque between the input member an... | 02/27/2007 |
| 7178654 | Low power modulating clutch control system A power transmission device includes a rotary input member adapted to receive drive torque from a source of torque, a rotary output member adapted to provide drive torque to an output device and a torque transfer mechanism operable to transferring drive torque from ... | 02/20/2007 |
| 7174996 | Hydraulic fluid feeder Supplying fluids different in pressure from one end of a revolving shaft without providing a diagonal hole in the revolving shaft for supply holes for feeding hydraulic fluid and lubricating oil. The time for manufacturing and the cost of providing a hydraulic fluid... | 02/13/2007 |
| 7171867 | Multi-clutch system with blended output system for powertrain transmissions A transmission system is provided utilizing multiple sets of clutch friction elements, each engaged to transfer torque from a torque input, such as an engine, to different gear ratios. The sets of clutch friction elements are operated simultaneously to provide a ble... | 02/06/2007 |
