Patent ID: 6467262
Filing Date: 2002-10-22
Classification: F16D

Abstract:
A hydraulic system for a hydraulically actuated clutch arranged between an internal combustion engine and a transmission as part of an electrohydraulic clutch control system, and including hydraulic emergency control, comprisinga pump driven by the internal combustion engine and delivering pressurized fluid to a work line; a throttle valve in the work line; a regulating valve having an output port connected to the clutch by a clutch line, said regulating valve comprising means for controlling the clutch upon failure of an electrical supply for the electrohydraulic clutch control system; a first control line connected to the work line upstream of the throttle valve and to a first control input of the regulating valve; a second control line connected to the work line downstream of the throttle valve and to a second control input of the regulating valve; a third control line connected to the clutch line and to a third control input of the regulating valve; wherein, when pressure in the first control line increases faster than pressure in the second control line, an opening cross section between a pressure port and the output port increases.