| 摘要 |
PURPOSE:To prevent low temperature corrosion, by calculating control deviation value of the temperature of cooling water, through comparing the temperature of a combustion chamber and the set degree of temperature of the cooling fluid, and regulating the flow of the cooling fluid according to this control deviation value, for keeping the temperature of the combustion chamber at the fixed degree over the whole of load range. CONSTITUTION:A temperature detecting element 11 is set on an internal combustion engine 6, for detecting the temperature of a combustion chamber, and a detected value is input into a comparison setting element 12. Proper degree of temperature of cooling fluid, which is correspondent with the temperature of the combustion chamber, at every load of the engine 6, is set in the comparison setting element 12, and control deviation value of the temperature of the cooling water is output, according to the deviation value between the set degree of temperature of the cooling fluid, and the input detected value sent from the temperature detecting element 11. A frequency converter 13 varies the rotating speed of a motor 2 which drives a cooling fluid pump 3, for a quantity of variation which corresponds with said control deviation value. |
