What are the main components of automobile circuits?

Hello, the composition of the whole vehicle circuit

The whole vehicle circuit usually consists of power supply circuit, starting circuit, ignition circuit, lighting and lighting signal device circuit, instrument information system circuit, auxiliary device circuit and electronic control system circuit.

1, power supply circuit

Also known as charging circuit, it is a circuit composed of battery, generator, regulator and charging indicator light. The circuit can also include power distribution and circuit protection devices.

2. Start the circuit

It is a circuit composed of starter, starting relay, starting switch and starting protection circuit. The low-temperature preheating starting device and its control circuit can also be included in this circuit.

3. Ignition circuit

This is a special circuit for gasoline-powered cars. It consists of ignition coil, distributor, electronic ignition controller, spark plug and ignition switch. The electronic ignition control system controlled by microcomputer is generally included in the engine electronic control system.

4, lighting and lighting signal device circuit

It is a circuit composed of headlights, fog lights, position lights, turn signals, brake lights, reversing lights, interior lights and related control relays and switches.

5, instrument information system circuit

It is a circuit composed of instruments and their sensors, various alarm indicators and controllers.

6, auxiliary device circuit

It is a circuit composed of various electrical equipment to improve the safety and comfort of vehicles. The types of auxiliary electrical equipment vary with different models. The higher the grade of the vehicle, the more complete the auxiliary electrical equipment. Generally, it includes windshield wiper and cleaning device, windshield defrosting (anti-fog) device, air conditioning device, audio device, etc. More advanced models are also equipped with electric window lifting devices, electric door locks, electric seat adjustment devices, electric remote control rearview mirrors, etc. The electronically controlled airbag is included in the electronic control system.

7. Electronic control system circuit

It is mainly composed of engine control system (including fuel injection, ignition and emission control), automatic transmission and constant speed driving control system, anti-lock braking system and airbag control system.