Patent ID: 6672180
Filing Date: 2004-01-06
Classification: F16H,Y10T

Abstract:
A transmission for transferring drive power from an engine to a driveline, comprising:a first shaft adapted to be driven by the engine; a second shaft adapted to drive the driveline; a first constant-mesh gearset having a first drive gear fixed to said first shaft and which is meshed with a first driven gear rotatably supported on said second shaft; a second constant-mesh gearset having a second drive gear fixed to said first shaft and which is meshed with a second driven gear rotatably supported on said second shaft; a third constant-mesh gearset having a third drive gear fixed to said first shaft and which is meshed with a third driven gear rotatably supported on said second shaft; a fourth constant-mesh gearset having a fourth drive gear fixed to said second shaft and which is meshed with a fourth driven gear rotatably supported on said first shaft; a first clutch having a first sleeve moveable between a released position and a locked position for releaseably coupling said first driven gear to said second shaft, a first clutch pack operably disposed between said first driven gear and second shaft, a first thrust mechanism for exerting a clutch engagement force on said first clutch pack in response to movement of said first sleeve from its released position toward its locked position, and a first power-operated actuator for moving said first sleeve between its released and locked positions; a first clutch ring fixed for rotation with said first driven gear and having clutch teeth engageable with clutch teeth on said first sleeve when said first sleeve is in its locked position; a blocker ring supported for sliding movement in response to movement of said first sleeve, said blocker ring adapted to engage said thrust mechanism for causing movement thereof relative to said first clutch pack; a second clutch having a second sleeve that is moveable from a released position to a first locked position for releaseably coupling said second driven gear to said second shaft, said second sleeve is further moveable from its released position to a second locked position for releaseably coupling said third driven gear to said second shaft, and a second power-operated actuator for moving said second sleeve; a third clutch having a third sleeve moveable between a released position and a locked position for releaseably coupling said fourth driven gear to said first shaft, a second clutch pack operably disposed between said fourth driven gear and said first shaft, a second thrust mechanism for exerting a clutch engagement force on said second clutch pack in response to movement of said fourth sleeve from its released position toward its locked position, and a third power-operated actuator for moving said third sleeve; and a transmission controller for controlling actuation of said first, second and third power-operated actuators.