Patent ID: 8434432
Filing Date: 2013-05-07
Classification: F01N,F01P,F02M,Y02T

Abstract:
1. A cooling system for an internal combustion engine, comprising: an engine coolant circuit having an engine coolant circuit inlet and an engine circuit coolant circuit outlet; a radiator having a radiator inlet and a radiator outlet; a first pipeline that hydraulically connects the radiator outlet and the engine coolant circuit inlet; a second pipeline that hydraulically connects the engine coolant circuit outlet and radiator inlet; a coolant pump located in the first pipeline and that pumps a coolant to the engine coolant circuit inlet; a thermostatic valve located in the first pipeline and between the coolant pump and the radiator outlet and that at least partially opens a connection between radiator outlet and the engine coolant circuit inlet; a bypass pipeline that hydraulically connects the second pipeline to the first pipeline; and an exhaust gas recirculation (EGR) cooler located in the bypass pipeline, wherein the bypass pipeline hydraulically connects the second pipeline to an intermediate point of the first pipeline that is located between the thermostatic valve and the radiator outlet, and the cooling system further comprises an auxiliary coolant pump located in the bypass pipeline upstream from the EGR cooler, and a controller controls said auxiliary coolant pump.