What is the reason for idling jitter of air-conditioned cars?

The unstable idle speed of automobile air conditioner is generally caused by excessive carbon deposition in the engine, because when the air conditioner is turned on, the compression of the air conditioner will increase the engine load, and the engine controls the throttle opening and the fuel injection amount of the injector according to the standard parameters. If there is carbon deposit in the throttle and injector, it will affect the actual intake and injection quantity, and the carbon deposit will also affect the atomization effect and air-fuel ratio of the mixture. This will lead to insufficient idle power of the engine and fail to meet the requirements brought by the air conditioning compressor. Idle speed will gradually decrease. When it is reduced to the limit value, the engine will repeatedly adjust the air intake and fuel injection, which gives us the phenomenon of unstable idle speed.