Composition of the fuel system

1. Electronic control unit

The electronic control unit calculates, processes and judges the various information input from various sensors of the engine according to its stored program, and then outputs instructions to control the action of the relevant actuators, so as to achieve the purpose of fast, accurate and automatic control of the engine. The electronic control unit (ECU) is the integrated control unit of the engine, and its basic component is mainly a microcomputer.

2. Sensors

The sensor converts non-electrical signals into electrical signals, or converts signals from physical, electrical, and chemical quantities into signals that can be understood by the electronic control unit.

The main sensors on the vehicle are: vehicle speed sensor, oxygen sensor, crankshaft position sensor, intake pressure sensor, temperature sensor (such as water temperature, intake air temperature). ), air flow sensor, knock sensor, throttle position sensor, vehicle speed sensor, ignition signal sensor, etc.

3. Actuator

According to the electronic control signal output by the electronic control unit of the actuator, the required mechanical action is completed to achieve a series of adjustment and control. The main actuators on the vehicle are: electric gasoline pump, electromagnetic fuel injector, idle electronic control valve, ignition device, exhaust gas recirculation device, etc.