What will happen if the idle motor is broken?

1, idle motor is related to idle speed, and failure will lead to excessive idle speed.

2. The idle motor will make abnormal noise before it fails, so pay attention to it.

3. If there is something wrong with the circuit, the idle speed will suddenly decrease.

Function:

1, when idling, change the cross-sectional area of the idle air passage according to the engine temperature and load, so that the engine has the best idle speed under different working conditions.

2. The idle motor is mainly used to bear the idle speed of the car, and its purpose is to adjust the idle speed according to the engine load during idle speed.

3. The idle stepper motor is installed on the throttle body and used by the engine controller to control the idle speed of the engine. When the engine speed deviates from the idle speed, it is adjusted by the throttle valve to control the amount of air entering the intake manifold, which is mechanically operated by the accelerator pedal wire rope.

Idle speed means that the engine runs with no load, and it only needs to overcome the friction resistance of its internal parts and does not output power to the outside. The lowest speed to maintain the stable operation of the engine is called idle speed, which is one of the five basic working conditions of the engine. The idle speed of an engine with good working performance is generally 550-800 rpm.

Idle speed can be adjusted by adjusting throttle opening and idling oil supply. Generally speaking, the minimum idle speed is the best when the engine does not shake in the idle speed range and the acceleration performance is good.

When you have a satisfactory mount, you will have to deal with idling every day. Simply put, idling means that the engine is "not working".

Idle speed phenomenon, that is, the car is parked while the engine is "chugging"-burning engine oil for nothing is really a waste! At this time, the mechanical work generated by gasoline combustion is consumed by the friction of internal parts.

According to GB 18285-2005, the idling condition refers to the no-load running state of the engine. That is, the clutch is in the engaged position and the transmission is in the neutral position (the car with automatic transmission should be in the "parking" or "P" position); In the automobile equipped with carburetor fuel supply system, the choke valve is in the full open position; The accelerator pedal is in the fully released position. High idle condition means that the above conditions (except the last one) are met. The accelerator pedal stably controls the engine speed at 50% rated speed or high idle speed specified in the manufacturer's technical documents.

References:

Baidu encyclopedia: idle speed