Paul D Stevenson - Ann Arbor MI, US Scott H Wittkopp - Ypsilanti MI, US Richard A Winship - Westland MI, US James B. Borgerson - Ann Arbor MI, US Joel M. Maguire - Northville MI, US Kent H. Kienzle - Ann Arbor MI, US Donald L. Dusenberry - Farmington Hills MI, US Jeffrey J. Biallas - Dexter MI, US Clinton E. Carey - Monroe MI, US
A powertrain includes a power transmission having an input shaft continuously connected directly between an engine and a planetary gear member of a first planetary gearset. Another member of the planetary gearset is selectively grounded by a torque transmitting mechanism to establish a reaction member during the launch of a vehicle incorporating the powertrain. The reaction member is established during both the lowest forward drive ratio and the reverse drive ratio. A third member of the planetary gearset transmits the torque from the input shaft, as modified by the planetary gearset, to other planetary gearsets in down stream power flow arrangement with the first planetary gearset.
Shushan Bai - Ann Arbor MI, US Donald L. Dusenberry - Farmington Hills MI, US Joel M. Maguire - Northville MI, US Andrew W. Phillips - Saline MI, US
Assignee:
GM Global Technology Operations, Inc. - Detroit MI
International Classification:
B60W 10/02
US Classification:
477180
Abstract:
A launch control system for a vehicle having an engine includes a clutch that selectively enables torque transfer from the engine. A control module determines a launch torque based on a throttle position and an engine speed to achieve a target engine stall speed. The control module determines a clutch torque based on the launch torque and that regulates engagement of the clutch based on the clutch torque.
Thermal Simulation Friction Device Cooling Control
Andrew W. Phillips - Saline MI, US Donald L. Dusenberry - Farmington Hills MI, US James M. Hart - Belleville MI, US
International Classification:
F16D 65/853
US Classification:
188264D, 192 7012
Abstract:
A cooling system for cooling a friction device includes a flow control device which controls a flow of fluid through the friction device. A controller estimates a temperature state of the friction device and calculates a flow command based on the temperature state. The controller operates the flow control device based on the flow command. The temperature state is one of a temperature of the friction device and a thermal energy of the friction device.
Shawn H. Swales - Canton MI, US Joel M. Maguire - Northville MI, US Andrew W. Phillips - Rochester MI, US Clinton E. Carey - Monroe MI, US James B. Borgerson - Auburn Hills MI, US Donald L. Dusenberry - Farmington Hills MI, US James M. Hart - Belleville MI, US Scott H. Wittkopp - Ypsilanti MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F16H 3/62
US Classification:
475275
Abstract:
The hybrid powertrain has a plurality of members that can be utilized to provide eight forward speed ratios and one reverse speed ratio in a hybrid transmission architecture. The transmission includes three planetary gear sets having five torque-transmitting devices and four fixed interconnections. The powertrain includes an engine, a damper, a pump, an engine disconnect clutch, and a drive motor, all operatively connected with the transmission to provide strong hybrid operating capability.
James B. Borgerson - Clarkston MI, US Donald L. Dusenberry - Farmington Hills MI, US Andrew W. Phillips - Rochester MI, US Scott H. Wittkopp - Ypsilanti MI, US Clinton E. Carey - Highland MI, US James M. Hart - Belleville MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F16H 3/72 F16H 3/44
US Classification:
475 5, 475282, 475288
Abstract:
A powertrain is provided having a multi-speed transmission. The 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. Each of the planetary gear sets includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.
Automatic Transmission Having Torque Converter Bypass
Andrew W. Phillips - Rochester MI, US Donald L. Dusenberry - Farmington Hills MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F16H 47/08
US Classification:
475 55
Abstract:
An automatic transmission having an improved lock up torque converter configuration includes two drive members: a first quill or tubular drive member which carries the output of the torque converter to the transmission gearbox and a second co-axial shaft or drive member which is driven by the torque converter lockup clutch and thus directly carries the engine output to the transmission gear box and bypasses the torque converter. The transmission gearbox includes two planetary gear assemblies having certain elements which are selectively grounded to the transmission housing by two friction brakes. This transmission, torque converter and torque converter clutch configuration prevents torque converter clutch engagement in its lower gear and forces torque converter clutch lockup in its upper gear.
Shushan Bai - Ann Arbor MI, US Paul G. Otanez - Troy MI, US Vijay A. Neelakantan - Rochester Hills MI, US Donald L. Dusenberry - Farmington Hills MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F16F 15/123
US Classification:
464 682
Abstract:
A system for absorbing vibration created by operation of an engine of the present invention includes a first plate driven by an engine shaft and a torque transmitting device for transferring torque from the engine shaft to a transmission input shaft. The system includes a first vibration absorber and a second vibration absorber. The first vibration absorber includes at least one selectively moveable mass. The second vibration absorber includes at least one biasing member and generally opposing ends. The first vibration absorber is configured to absorb vibrations created at a first harmonic of the engine and the second vibration absorber is configured to absorb vibrations created at multiple harmonics of the engine.
Scott H. Wittkopp - Ypsilanti MI, US James B. Borgerson - Clarkston MI, US Donald L. Dusenberry - Farmington Hills MI, US James M. Hart - Belleville MI, US Farzad Samie - Franklin MI, US Alexander Millerman - Bloomfield Hills MI, US Chunhao J. Lee - Troy MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F16D 13/04
US Classification:
192 47, 192 41 R
Abstract:
A selectable one-way clutch (SOWC) assembly uses hydraulic-actuation to select operating modes within a rotating housing. Two races of the SOWC assembly can rotate at disparate speeds, i. e. , one race is not grounded prior to actuation. The SOWC assembly has a pair of races keyed to different housings and hubs. The housing and hub can be attached to different elements of a gear train, for example, which can be rotating during the various gear states. A hydraulic actuator or multiple actuators can be keyed to the housing, with axial motion of the actuator or actuators selecting a state or operating mode of the SOWC assembly. The actuator has axially-extending tabs that engage radially-extending fingers of the selector plate, thus rotating the selector plate in different directions when applied or released. Multiple actuators can be used in conjunction with multiple selector plates to provide additional SOWC operating modes.
Isbn (Books And Publications)
Effects Of Construction On Structures: Proceedings Of Sessions Of Geo-Congress 98