ENGINE COOLING DEVICE FOR HYBRID VEHICLE

摘要

PURPOSE:To improve startability of an internal combustion engine by connecting a driving electric motor to an internal combustion engine by a cooling water circulating circuit and warming the internal combustion engine when the driving electric motor is driven. CONSTITUTION:An engine cooling device for a hybrid vehicle is provided with a driving electric motor 2, a battery 3 for supplying electric power to the driving electric motor, an engine 4 for driving a generator 5 so as to supply electric power to the battery 3, and a third cooling water circulating passage R3 for connecting a first cooling water circulating passage R1 for cooling at least the electric motor 2 to a second cooling water circulating passage R2 for cooling the engine 4.