Patent ID: 7124715
Filing Date: 2006-10-24
Classification: B60H,F01P,F02M

Abstract:
1. An engine cooling system comprising: a primary cooling circuit having: a pump for pumping liquid coolant to an engine; an engine return line for coolant returned from the engine; a radiator having a inlet side and an outlet side; a bypass; and a primary flow control valve and a pump return line, the primary flow control valve and the bypass being connected in parallel with the radiator inlet side and the bypass connected to the engine return line, the radiator outlet side and the bypass connected to the primary flow control valve and the primary control valve being operative to control flow as between the radiator and the bypass to allow fluid to flow from the radiator only when the sensed temperature of the coolant is above a normal running temperature of the engine; the temperature responsive control valve being operable, depending upon the sensed temperature of the coolant, to shut off flow through both of the inlets simultaneously, to shut off flow through the first inlet while permitting flow through the second inlet and to shut off flow through the second inlet while permitting flow through the first inlet.