Hydraulic clutch control device

摘要

The device (12) has a control piston (16) mounted in a body (14) and carrying a compression spring (48) that elastically returns a valve (38) in a position in which the valve is disengaged from a communication unit (34). The valve has a pressure force application unit (P) comprising hydraulic pressure surfaces (50, 52) that are plain and perpendicular to displacement direction of the valve. The surfaces stress the valve against elastic return force of the valve by fluidic pressure effect on the application unit. An independent claim is also included for a valve module for a hydraulic control device.