| 摘要 |
PROBLEM TO BE SOLVED: To enable a rapid decrease in temperature of an entire vehicle by promoting a temperature decrease of a cooling system on the electric motor side using a cooling system on the power supply side which is relatively cooler, in an electric motor and power supply wherein the cooling capability (working assurance temperature) required to meet the operating conditions differs. SOLUTION: While operating a hybrid vehicle, electric pumps 46, 49 and an electric fan 50 of first and second cooling systems C1, C2 are driven, increasing and decreasing the amount of cooling water circulated and the amount of cold air provided to radiators 44, 47. This cools the power supply of a power head 40 and the like and electric motors 1, 4 to a specified temperature region. At this time, when operation of the vehicle is stopped by turning the key to OFF and the water temperature of each of the cooling systems C1, C2 rises abruptly, a valve BM1 is kept closed and a valve BM2 is opened. As a result, a mid reservoir tank 51 connects to a reservoir tank 53 of the second cooling system C2 such that the cooling capability of the second cooling system C2 increases from the cooling water that is at a relatively low temperature in the tank 51. |
