| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for optimizing a supply flow rate of heated cooling water to an internal combustion engine at the time of preheating. SOLUTION: A thermal storage system supplies cooling water stored in a heat retention manner in a thermal storage tank to a cooling water passage of the internal combustion engine by an electric water pump. This is characterized by an engine wall surface temperature estimation means for estimating temperature at a wall surface of the internal combustion engine, a tank water temperature estimation means for estimating temperature of the cooling water stored in the thermal storage tank and a flow rate control means for controlling the flow rate of the cooling water to be supplied by the electric water pump according to a temperature difference between the estimated wall surface temperature and the temperature of the cooling water stored in the thermal storage tank. Control is made so that for instance the more the temperature difference is, the more the supply flow rate of the cooling water to the cooling water passage increases. COPYRIGHT: (C)2006,JPO&NCIPI
|
