SOLENOID OPERATED CLUTCH ENGAGEMENT

摘要

PCT No. PCT/US82/01061 Sec. 371 Date Aug. 4, 1982 Sec. 102(e) Date Aug. 4, 1982 PCT Filed Aug. 4, 1982.An electrical solenoid operates a three-way valve having a vent port, a port connected to a source of high pressure hydraulic fluid and a port connection to a pilot valve. A check valve supplied from a source of low pressure hydraulic fluid is connected to the cylinder of a clutch or servo of an automatic transmission when a pilot valve opens this communication upon energizing the solenoid coil. The clutch cylinder is depressurized through the pilot valve to the vent port of the solenoid-operated valve.