Clutch piston that applies through compensation dam

Abstract

A hydraulically applied clutch for a vehicle drivetrain includes a hub, a piston, and a compensation dam. The piston is sealed to the hub at a piston outer diameter and a piston inner diameter. The piston has a plurality of axial protrusions for applying an axial force to a clutch plate. The compensation dam is sealed to the hub at a compensation dam outer diameter. The compensation dam has a plurality of apertures for receiving the plurality of axial protrusions. In an example embodiment, the piston outer diameter and the compensation dam outer diameter are axially aligned. In an example embodiment, the hydraulically applied clutch includes a plurality of seals, each installed on a one of the plurality of axial protrusions for sealing the plurality of axial protrusions for the plurality of apertures.

Dependencies are inferred from the claim text.