Patent ID: 6523657
Filing Date: 2003-02-25
Classification: F16D

Abstract:
Multiple-clutch device, for installation in a drivetrain of a motor vehicle between a drive unit and a transmission, comprising a first clutch arrangement associated with a first transmission input shaft of the transmission, and a second clutch arrangement associated with a second transmission input shaft of the transmission for transmitting torque between the drive unit and the transmission, in which at least one of the clutch arrangements, has a greater effective friction radius than a other of said clutch arrangements, said at least one clutch arrangement serving as a starting clutch and being a plate clutch arrangement including plates in a stack, said at least one clutch arrangement including additionally, at least one of the following groups of features:a) plates in said plate stack which have at least one friction facing which can frictionally engage with plates having no friction facing, at least one of the plates with no friction facing being thicker in an axial direction than a thickness of a friction clement carried on the friction facing of an adjacent plate; b) at least one plate in said stack has a friction facing, said friction facing being of a sintered material, and at least one other plate in said stack has a friction facing of another friction facing material, said another friction facing material having a progressive frictional coefficient curve (d&mgr;/d&Dgr;N) in relation to a slip speed (&Dgr;N).