Patent ID: 7325885

Claim:
A regulator valve for controlling the pressure of fluid engaging a torque-transmitting mechanism in a transmission, the valve comprising: a valve body forming a valve bore and a plurality of passages; a spool valve slidably disposed in said valve body; a check valve selectively closing one of said passages when fluid pressure in said one of said passages is not greater than a first predetermined pressure and opening when fluid pressure in said one of said passages is greater than said first predetermined pressure; a spring disposed in said valve bore and biasing said spool valve in one direction; and said spool valve, check valve, spring, valve bore and passages being cooperatively configured to control the pressure of fluid provided at the torque-transmitting mechanism such that the fluid is provided at a linearly increasing pressure until said first predetermined pressure is achieved to the torque-transmitting mechanism and at a second constant predetermined pressure greater than said first predetermined pressure after said first predetermined pressure is provided.