Double clutch unit has at least one disc clutch, and operating piston and disc carrier with at least one pressure compensating hole or cooling fluid drain hole in radially outer or center region

摘要

At least one(64,72) of the clutch assemblies is constructed as a disc clutch and has an operating piston(110,130) defining a pressure chamber(118,140) and is especially for engaging the clutch by hydraulic pressure medium. The disc clutch assemblies are fed with cooling oil. The operating piston and if desired one disc carrier has at least one pressure compensating hole(162) and/or cooling fluid drain hole(164) in a radially outer and/or center region. An Independent claim is included for the drive train of a motor vehicle with a proposed clutch unit between the drive unit and transmission.