Patent ID: 6460425
Filing Date: 2002-10-08
Classification: F16H,Y10T

Abstract:
A twin-clutch transmission for use in a motor vehicle having an engine and a driveline, comprising:an output shaft adapted for connection to the driveline; a first input shaft driving a first countershaft; a second input shaft driving a second countershaft; a first engine clutch operable for establishing a releasable drive connection between the engine and said first input shaft; a second engine clutch operable for establishing a releasable drive connection between the engine and said second input shaft; a first constant-mesh gearset driven by said first countershaft; a second constant-mesh gearset driven by said second countershaft; a first shift clutch for releaseably engaging said first gearset to establish a drive connection between said first countershaft and said output shaft; a second shift clutch for releasably engaging said second gearset to establish a drive connection between said second countershaft 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 pump to said second pump such that when said first engine clutch and first shift 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 from said first pump to said second pump for synchronizing the rotary speed of said second gearset driven by said released second input shaft to that of said output shaft.