Patent ID: 6427550
Filing Date: 2002-08-06
Classification: F16H,Y10T

Abstract:
A twin-clutch transmission for use in a motor vehicle having an engine and a driveline, comprising:an output shaft adapated for connection to the driveline and having an output gear fixed thereto; a first input shaft rotatably supporting a first speed gear meshed with said output gear; a first engine clutch operable for establishing a releasable drive connection between the engine and said first input shaft; a first shift clutch operable for releaseably coupling said first speed gear to said first input shaft to establish a drive connection between said first input shaft and said output shaft; a second input shaft rotatably supporting a second speed gear meshed with said output gear; a second engine clutch operable for establishing a releasable drive connection between the engine and said second input shaft; a second shift clutch operable for releasably coupling said second speed gear to said second input shaft to establish a drive connection between said second input shaft and said output shaft; a first fluid pump driven by said first input shaft; a second fluid pump driven by said second input shaft; and a flow path connecting said first fluid pump to said second fluid pump such that when said first engine clutch and first shaft clutch are engaged and said second engine clutch and second shift clutch are released, driven rotation of said first input shaft causes high pressure fluid to be transferred through said flow path to said second pump for synchronizing the rotary speed of said released second input shaft with that of said output shaft.