The ECU determines the concentration of the engine combustion air-fuel ratio based on the difference in electric potential from the oxygen sensor and controls the duration of injection accordingly.

The ignition coil converts the low-voltage electricity from the primary winding resistance into high-voltage electricity from the secondary winding resistance, which is discharged through the spark plug to produce a spark that ignites the fuel-air mixture in the cylinder.

Converts the electrical energy from the battery into mechanical energy to drive the engine flywheel to rotate to reach the engine start.

The electronic throttle consists of a throttle, a throttle driver and a throttle position sensor. The command from the ECU is that the throttle driver works to influence the opening of the throttle through the transmission gear.

Automobile air conditioning compressor is the heart of the automobile air conditioning refrigeration system, constantly delivering compressed air to the storage tank, so that the pressure inside the tank gradually increases, so as to obtain the required compressed air. It plays the role of compressing and transporting refrigerant vapor.