| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine cooling water circulation device capable of keeping combustibility of an internal combustion engine good by keeping the temperature of intake air adequate even during cold time and after warming-up.SOLUTION: In a cold state, thermostat valves 34, 38 are closed and a thermostat valve 62 is opened, and an intercooler water pump 50 is stopped. As a result, cooling water does not flow in a radiator 36 but circulates in an exhaust cooling adaptor 20 and an intercooler 18, and so intake air is heated by the intercooler 18. This keeps combustibility good during cold while preventing an intake air system from being frozen. After warming-up, the thermostat valves 34, 38 are opened and the thermostat valve 62 is closed, and the heated cooling water does not flow in the intercooler 18. Cooling water cooled by the intercooler water pump 50 and an intercooler radiator 52 flows in the intercooler 18, instead, to cool the intake air. This keeps combustibility good after warming-up. |
