Patent ID: 7311187

Claim:
A hydraulic circuit for controlling the application of pressurized cooling fluid to the clutches of a dual clutch transmission, said circuit including: a cooling unit in fluid communication with a source of said pressurized cooling fluid and adapted to exchange heat from said cooling fluid with another media; first and second regulators in fluid communication with said source of pressurized cooling fluid and separately in fluid communication with said cooling unit, said first regulator being in fluid communication with a first clutch of the dual clutch transmission, said second regulator being in fluid communication with a second clutch of the dual clutch transmission such that said first regulator is adapted to operatively provide said cooling fluid to the first clutch and said second regulator is adapted to operatively provide said cooling fluid to the second clutch; and at least one control actuator adapted to selectively control said regulator to provide a first variable predetermined amount of cooling fluid from said cooling unit to said clutches as primary cooling, and also to provide a second variable predetermined amount of cooling fluid from said source to said clutches thereby supplementing said cooling fluid from said cooling unit.