Patent ID: 7517296

Claim:
A variable motor/generator cooling control system for an electrically variable hybrid vehicular transmission comprising: a solenoid valve; a line pressure source of pressurized fluid; at least one motor/generator; at least one relay valve, having a first position and a second position being controlled by said solenoid valve, and operable to selectively distribute said pressurized fluid from said line source to said at least one motor/generator for cooling; wherein said solenoid valve controls said at least one relay valve by selectively variably pressurizing a control passage; and a multiplex valve having a first position and a second position, wherein said multiplex valve is operable to selectively distribute said pressure within said control passage to said at least one relay valve when said multiplex valve is in said first position, and to selectively distribute said pressure within said control passage to a damper trim valve when said multiplex valve is in said second position.