Patent ID: 6595339
Filing Date: 2003-07-22
Classification: F16H

Abstract:
A multi-step automatic transmission for a motor vehicle with a plurality of clutches and brakes which are designed, at least partly, as wet-running multi-disk clutches with inner and outer disk carriers, and each of the inner disk carriers having a disk set and each of the outer disk carriers having a disk set, the disk set of the inner disk carrier together with an associated disk set of the outer disk carrier forming a clutch, and a hydraulic piston (1) being associated with each clutch for engaging and disengaging the clutch;wherein a baffle plate (2) is associated with the piston (1) of the clutch such that the piston space is separated into a first pressure chamber (3) and a second pressure chamber (4), and the first pressure chamber (3) and the second pressure chamber (4) are both loadable with a desired variable pressure without hindering a total stroke of the piston (1).