| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable promotion of temperature rising of a supercharger 2 only when the warming-up of the supercharger 2 is needed, in an engine cooling device provided with: a high-temperature coolant circulation path 20 for extracting coolant for an engine 1 with the supercharger 2 to the outside followed by returning; and a low-temperature coolant circulation path 30 for circulating coolant to be supplied to a water-cooled intercooler 3. <P>SOLUTION: The engine cooling device includes flow path control means (41, 42) for forming a first flow path (refer to the solid line arrow) for circulating the coolant extracted from the engine 1 to a water jacket 2b provided on the supercharger 2 or a second flow path for circulating the coolant in the low-temperature coolant circulation path 30 to the water jacket 2b (refer to the dashed line arrow in Fig.2). A control unit 100 controls the flow path control means (41, 42) to form the first flow path (refer to the solid line arrow) when coolant temperature thw2 in the low-temperature coolant circulation path 30 is a predetermined threshold Y or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
