EGR COOLING SYSTEM FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To maintain a cooling effect of EGR gas always under a stable condition by regulating flow rate of refrigerant pumped to EGR cooler. SOLUTION: This system is provided with a hybrid electric equipment cooling system cooling EGR gas of an EGR device 35 by an EGR cooler 37 without receiving heat supply from a combustion chamber of the engine 11, and is provided with a variable water pump 44 varying flow rate of cooling water pumped to the EGR cooler 37. An inverter 19 is provided on a downstream side of a radiator 42 and on an upstream side of the EGR cooler 37, and delivery quantity of the variable water pump 44 is regulated based on EGR gas temperature detected by an exhaust gas temperature sensor 37a. COPYRIGHT: (C)2006,JPO&NCIPI