| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an engine cooling device that facilitates the reduction of a device size and prevents an increase of power consumption. <P>SOLUTION: The engine cooling device includes: a vehicle traveling engine; a pump driven by the engine; a heat exchanger; a circulation path that circulates a coolant between the engine and the heat exchanger by the driving of the pump; a solenoid valve 6 capable of opening and closing the circulation path; and a control device that controls the operation of the engine. The solenoid valve 6 is provided with: a valve body 10 movable to a position of separating from a valve seat 9 and a position in contact with the valve seat 9 and held in contact with the valve seat 9; and a solenoid 12 that maintains the contact between the valve body 10 and the valve seat 9 by electrical conduction. The valve body 10 is provided movably to the position of separating from the valve seat 9 by the fluid pressure of the coolant during the driving of the pump when the solenoid 12 is in a non-conductive state. A control device is provided to perform control so that electrical conduction to the solenoid 12 is started before the engine is started. <P>COPYRIGHT: (C)2012,JPO&INPIT |
