Patent ID: 7069880
Filing Date: 2006-07-04
Classification: F01P

Abstract:
1. An engine cooling system comprising: a primary cooling circuit having an engine supply line, a pump return line, a radiator for cooling liquid coolant for the engine and a pump to circulate the coolant through said engine supply line to the engine, from the engine to said radiator and from said radiator back to said pump through said pump return line; an auxiliaries cooling circuit having at least one auxiliary heat exchanger for cooling one or more further liquids and arranged so that coolant can flow from said engine supply line through said auxiliary heat exchanger and be returned as an auxiliaries return flow into said pump return line; a heater circuit having a heater comprising a liquid to air heat exchanger and arranged so that coolant can flow from said engine supply line through the engine and then through said heater and be returned as a heater return flow into said pump return line; and a common control valve provided between said auxiliary heat exchanger and said pump return line and between said heater and said pump return line to control both said auxiliaries return flow and said heater return flow.