Patent ID: 7117881

Claim:
A control system comprising: a directional valve assembly designed for controlling a cooling system for a clutch and for ensuring a minimum pressure and suctioning function of a pump, wherein the valve assembly comprises a single valve for ensuring cooling of the clutch and the minimum pressure and the suctioning function of the pump, and wherein the valve comprises a first actuating piston, a second actuating piston, and at least seven ports, and first and the second actuating pistons are housed in a valve chamber and are slidable, and at least one of the at least seven ports are connected to at least one of the clutch cooling system, a return line for the clutch cooling system, the pump, and a pilot pressure source, wherein the at least seven ports of the valve comprise a first, a second, a third, and a fourth port on the valve chamber, and the clutch cooling system is connected to the first, the second, the third, and the fourth ports on the valve chamber.