What is the reason why it is easy to turn off the air conditioner when idling?

Air conditioning and refrigeration systems are major energy consumers of engines. When the refrigeration system is started, 10%- 15% of the power of the engine will be used to drive the refrigeration compressor and fan. If the engine suddenly increases such a large resistance when idling, it is likely to cause the engine to stall due to lack of power.

Therefore, when the air conditioner switch is pressed for refrigeration, the signal to turn on the air conditioner will be sent to the engine computer first, and the engine computer will accelerate the engine through the throttle control system first, and then engage the compressor to avoid flameout due to sudden load.

Generally, the reasons that lead to the flameout of the idle air conditioner are the problems of the throttle idle control system, such as the dirty throttle without timely maintenance and cleaning, or the stuck or damaged idle valve.

In addition, in some models, the application signal to turn on the air conditioner and start the compressor is executed simultaneously. If the application signal is not sent out for some reason (such as line disconnection), the compressor will be put into operation without increasing the speed of the engine, which will easily cause the engine to stall.

In any case, it is a fault to turn on the air conditioner and turn off the engine, so it is necessary to carry out targeted maintenance instead of adjusting the accelerator pedal or tightening the accelerator cable to avoid the fault from expanding.