Gm Global Technolgoy Operations, Inc.

Shanghai Jiaotong University

Robert Boschgmbh

Chengliang Yin

Chunhao J Lee

Li Chen

Jian Yao

Farzad Samie

Chi-Kuan Kao

Yu Dong

Jie Shu

Dongxu Li

Mingliang Zhang

Zhao Ding

Futang Zhu

A torque transmitting device () includes a clutch housing () rotatable about an axis (A), a first set of clutch plates (A) splined to the clutch housing (), and a second set of clutch plates (B) interleaved with the first set and rotatable about the axis (A) of rotation. A push plate assembly () is splined to the clutch housing () for rotation therewith. A roller assembly () includes a roller housing () splined to the clutch housing (), a roller supporter () housed in the roller housing (), and a roller element () supported by the roller supporter (). A wedge assembly () includes a wedge housing () connected to a wedge block (). The wedge housing () includes a ramp member () defining a ramp surface () with the roller element () contacting the ramp surface (). A motion converter () is disposed between the push plate assembly () and the wedge housing () such that axial movement of the push plate assembly () causes rotation of the wedge assembly () relative to the roller assembly ().

Rotating electrical wedge torque transmitting device

A two-speed transmission is provided. The transmission comprises a planetary gear train () having a sun gear, a fixed annular gear (), at least one planet gear () and a planet carrier (). A dual clutch () is disposed between the planetary gear train and a prime mover which outputs rotational movement. The dual clutch is configured to be driven into a first clutching mode in which it kinematically couples the sun gear with the prime mover, and a second clutching mode in which it kinematically couples the planet carrier with the prime mover. And an actuator is configured to selectively drive the dual clutch into one of its first and second clutching modes. An electric vehicle comprises the two-speed transmission.

Two-speed transmission and electric vehicle

An actuation system for actuating a clutch piston of a transmission includes an actuator and a lever. A first end of the lever is attached to the actuator. The lever is pivotable about a lever connection location. Movement of the actuator rotates the lever about the lever connection location. A spring assembly is pivotable about a spring connection location, and pivotably connected to the lever at a second end of the lever. When the actuator is disposed in an un-actuated position, the spring assembly is positioned such that a pre-loaded spring force is directed along a zero moment path to generate a zero moment in the lever. When the actuator is disposed in an actuated position, the spring assembly is rotated so that the spring force is directed along a moment generating path in order to generate a moment in the lever to rotate the lever.

Dry dual clutch transmission actuation system using electrical motor with force aided lever

A torque transmitting system includes a case, first and second clutch plates, and a ramp member that is selectively rotatable about an axis and that defines a ramp surface. The system also includes an electric motor having a motor housing, wherein the case is rotatable relative to the housing about the axis. The motor is configured to selectively apply torque to rotate the ramp member. The system additionally includes a roller element mounted with respect to the case and contacting the ramp surface. The ramp surface is configured such that, when the ramp member is rotated about the axis, the roller element exerts a reaction force on the ramp surface that urges the ramp member to move in a first axial direction and thereby transmit the reaction force to the clutch plates. A transmission assembly including the above described torque transmitting system is also disclosed.

Torque transmitting system

A torque transmitting device includes a plurality of clutch plates, a ramp member that is selectively rotatable about an axis and that defines a ramp surface, a worm gear that is operatively connected to the ramp member for rotation therewith about the axis, and a roller element contacting the ramp surface. The ramp surface is configured such that, when the ramp member is rotated about the axis, the roller element exerts a reaction force on the ramp surface that urges the ramp member to move in a first axial direction and thereby transmit the reaction force to the clutch plates.

Torque transmitting device

Growing community of inventors

Shanghai, China

Chengliang Yin