What happens if a small rag falls into the accelerator and hits the car?

According to the load of the engine, the air intake is controlled. Throttle is a device on the engine intake system, which is a circular steel plate with a shaft in the middle and controlled by throttle cable. Therefore, when we step on the accelerator, we actually increase the air intake, not the fuel supply. When the air intake increases, the computer will instruct the fuel injector to increase the fuel supply. When the engine is running at low speed, due to the small throttle opening and the small air intake (flow), some extremely fine dust (not filtered by the air filter) and exhaust gas in the engine valve chamber will be deposited on the throttle and the air intake of the idle speed control valve, resulting in the problems of slow throttle response (reduced actual air intake) and unstable idle speed.

Throttle (also called throttle body), the throttle is dirty, clean it to solve the jitter and fuel consumption. Throttle has many functions, mainly in the following aspects: 1, to improve power by accelerating or decelerating; 2, through its self-regulation, correct the air intake function; 3. Why can't the spark plug of the EFI car get water under normal circumstances? Because when the throttle valve is opened to the maximum extent, the nozzle will stop injecting oil and play the role of cleaning the cylinder; 4. The function of controlling the operation of the engine assembly (the idle switch inside the engine is working); 5, control the flap, through the work of the sensor, control the size of the air intake, for the promotion of power; Dirty throttle is mostly caused by poor air quality and poor oil quality. Due to the negative pressure, the carbon deposit produced in the process of gasoline combustion will infect the throttle valve and make it not close well, thus increasing the intake air, causing signal transmission errors, resulting in high fuel consumption and engine idling jitter. Therefore, during the maintenance period, always check the throttle opening. If it exceeds the normal range, it should be cleaned.