The composition of the traditional automotive ignition system

Ignition system is the most fundamental power source for engine operation, and the composition of the ignition system is relatively complex. After all, it is necessary to ensure that an electric spark can be generated inside the cylinder in a timely, accurate and reliable manner to ignite the combustible mixture and generate sufficient power. Currently there are three ignition systems, of which the electronically controlled ignition system is a new type of ignition system widely used in modern times.

First, the type and composition of the ignition system

There are three types of automotive engine ignition system: traditional ignition system, electronic ignition system and microcomputer control ignition system (with or without power distributor). Modern automobiles mostly use electronic ignition systems, which are mainly composed of power supply, sensors, ECU, ignition devices, ignition coils, distributors, spark plugs and so on. Composition; microcomputer control ignition system mainly consists of sensors, ECU, ignition module, ignition coil and spark plugs. Composition.

In the composition of the ignition system, the ignition coil is a very important and relatively complex part, mainly composed of primary coil, secondary coil, iron core, ignition module and so on. Then, the ignition unit controls the ignition coil primary circuit according to the instruction. When the circuit is energized, the ignition coil primary circuit is turned on. When the primary circuit is cut off, a high voltage is induced in the secondary coil, which is sent to the spark plug of the working cylinder through the distributor or directly, thus completing the ignition.

Third, the ignition system components and role

1. Sensors

Sensors are used to check the ignition-related information on engine conditions, and the results will be used as data ignition sent to and from the electronic control unit for control.

2. Control Unit

The electronic control unit is the control core of the electronic control system. It analyzes the data from the sensor, through the pre-programmed program to calculate the judgment, the ignition coil of the primary circuit of the best ignition advance angle and conduction time of the control signal sent to the controller.

3, ignition equipment

Ignition is electronically controlled / it can amplify the ignition signal output from the electronic control system, drive the ignition coil work.

4. Ignition Coil

The ignition coil converts the 12V, 24V low voltage DC of the power supply to 15-20kv high voltage DC. There is only one ignition coil in the electronically controlled ignition system with a distributor, while there are multiple ignition coils in the system without a distributor.

5. Distributor

According to the ignition sequence of the engine, the distributor sends the high voltage electricity generated by the ignition coil to the spark plugs of each cylinder in turn.

6. Spark Plugs

Spark plugs utilize the high voltage generated by the ignition coil to produce an electric spark that ignites the air-fuel mixture in the cylinder.