Patent ID: 8226526

Claim:
A control system for controlling a hybrid drive unit of a vehicle, the control system comprising: a pressure regulator valve in fluid communication with a plurality of fluid lines and configured for regulating a line pressure of a fluid within the plurality of fluid lines; a first valve in fluid communication with at least one of the plurality of fluid lines and configured for opening and closing fluid communication between the plurality of fluid lines and a first clutch for engaging and disengaging the first clutch respectively; and a second valve in fluid communication with at least one of the plurality of fluid lines and configured for opening and closing fluid communication between the plurality of fluid lines and a second clutch for engaging and disengaging the second clutch respectively; wherein the first valve disengages the first clutch and the second valve disengages the second clutch to operate the hybrid drive unit in a first mode, the first valve engages the first clutch and the second valve disengages the second clutch to operate the hybrid drive unit in a second mode, the first valve engages the first clutch and the second valve engages the second clutch to operate the hybrid drive unit in a third mode, and the first valve disengages the first clutch and the second valve engages the second clutch to operate the hybrid drive unit in a fourth mode.