| 摘要 |
PURPOSE:To effectively utilize the deceleration energy of a vehicle for cooling therein, by surely detecting the deceleration of the vehicle on the basis of the detected values of the vehicle speed and the negative pressure of an intake manifold to drive a compressor for the cooling. CONSTITUTION:The negative pressure of a manifold 14 is found out by a negative pressure detector 9 made of a diaphragm 10. The speed of a vehicle is found out in terms of the output signal of a speedometer. It is first judged whether the vehicle speed is higher than a set level or not. When the speed is not higher than the set level, as during the stoppage of the vehicle, a compressor 1 is put in operation. When the speed is higher than the set level, it is judged whether the negative pressure is higher than a set level or not. When the negative pressure is higher than the set level, namely, the vehicle is being decelerated, the compressor 1 is put in operation. When the negative pressure is not higher than the set level, namely, in the high load state such as acceleration, rapid movement and uphill movement, the compressor 1 is put out of operation. |
