| 摘要 |
PURPOSE:To supply the required quantity of cooling gas by turning a valve plate according to a radiator passing air temperature to control the opening and closing of the first return hole and axially moving the valve plate according to temperature of the water in a pump to control the opening and closing of the second return hole. CONSTITUTION:When a radiator passing air temperature reaches a designated value, a valve plate 31 interlocking with a bimetal 29 opens the first return hole 23. Then, viscous fluid is supplied to a torque transmission surface 22 to keep the rotation of a fan at the medium speed. When the temperature of the cooling water in a water pump 38 reaches a designated temperature, a rod 47 interlocking with a thermostat 46 is moved, whereby the valve plate 33 is moved to open the second return hole 24 to increase the rotating speed of the fan. Thus, the required quantity of gas according to a caloritic value of an engine can be supplied with good accuracy. |
