Hydraulically controlled friction clutch, in particular single-disc dry clutch, primarily for motor vehicles

摘要

A hydraulically controlled friction clutch, in particular a single-disc dry clutch for motor vehicles, has an annular piston which is guided axially within the transmission case, can be subjected hydraulically to pressure on its rear side and, at its front side, serves to actuate the clutch release lever. A pressure transmitter cylinder is furthermore provided and, as a function of a clutch pedal actuation - this supplies the annular piston with a hydraulic control pressure via a conduit system with control valves. The annular piston is guided in an annular cylinder which is part of a hydraulic clutch thrust bearing which surrounds the transmission input shaft concentrically but with a radial clearance and therefore freely. In the interior of the transmission case, the hydraulic clutch thrust bearing is screwed to the said case in the region of the so-called clutch bell. In a hydraulically controlled friction clutch of this kind, additional mechanical actuating elements are replaced by a hydraulic clutch thrust bearing with various non-return valves and are therefore superfluous. This makes possible considerable weight savings on the clutch. The clutch is easy to operate since frictional resistances do not occur. A further advantage is the elimination of readjustment of the clutch.