| 摘要 |
PURPOSE:To enable a diesel car and others which produce no negative pressure in an intake manifold, to be controlled in a device where the discharge temperature of an evaporator and a compressor under the accelerating condition are controlled by configurating the device in such a manner that the accelerating condition is determined by the differential coefficient of the engine speed. CONSTITUTION:The number of revolution of an engine is detected by an engine speed sensor 10, and the stepping depth of an accelerating pedal is detected by an accelerating switch 13. The both detected signals are inputted into a control amplifier 14 where (14) the number of revolution of the engine 10 is differentiated allowing change in differential coefficient to be compared one by one. This allows the amplifier 14 to determine whether a car is running at a stationary speed or is accelerating based on the amount of the above said change. Simultaneously, the car is determined by the acceleration switch 13 whether it is accelerating or not. If the car is found to be accelerating, an operation rate control signal is outputted allowing the compressor operating temperature to be set higher through a thermo-amplifier 3. Then, this effects an ON-OFF control of a relay. This configuration enables even a car which produces no negative pressure in an intake manifold to be controlled. |
