| 摘要 |
PURPOSE:To realize quick warm-up and prevent oxidation and corrosion by providing a switching valve opening or closing the connection between the upper section of a water jacket and the atmosphere and a temperature detecting means detecting the refrigerant temperature in the water jacket. CONSTITUTION:A water jacket 2 is filled with a liquid refrigerant while an engine is stopped. A reservoir tank 24 is connected to a lower tank 21 via the first refrigerant circulation passage 26 and is connected to the water jacket 2 via the second refrigerant circulation passage 27 provided with a refrigerant feed pump 4. The first solenoid valve 12 opens or closes the connection between the upper section of the water jacket 2 and the atmosphere. The first temperature switch 14 detects the refrigerant temperature in the water jacket 2. The solenoid valve 12 is opened during the predetermined cold start. Accordingly, quick warm-up is realized during the cold start, and oxidation and corrosion can be prevented. |
