| 摘要 |
PROBLEM TO BE SOLVED: To provide a constitution capable of further properly controlling cooling of an engine.SOLUTION: An engine cooling device (40) includes a cooling liquid passage (42), a pump (43) and a pump control section (45). The pump is electrically driven, its flow rate is variable by switching normal and reverse rotations, and the pump can be intermittently driven in both of normal rotation and reverse rotation. The pump control section controls the driving of the pump. The pump control section rotates the pump in the reverse direction and intermittently drives the pump in a minimum flow rate region where a flow rate of cooling liquid circulated in a cooling liquid jacket (16) is minimum. |
