What does the ignition system consist of? What is the composition of the ignition system

The ignition system of an automobile is composed of a battery, a generator, a distributor, an electric fire coil and a spark plug.

Among them, the primary coil of the power supply, the cut-off current and the ignition coil constitute the low-voltage circuit part, and the ignition coil, the distributor and the spark plug constitute the high-voltage circuit part.

The ignition of the car mainly relies on the spark plug, the car can instantly release an electric spark of sufficient energy between the two poles of the spark plug when ignition, and ignite the fuel mixture in the engine cylinder at the same time, when the gasoline engine is compressed to a point, the spark plug ignites the gas mixture, so that the engine outputs power.

The ignition system on the car is divided into two kinds, one is the traditional ignition system, the other is the electronic ignition system, and the current distributor ignition system is the most advanced ignition system at present.

According to the different power supply, it can be divided into battery ignition system and magneto ignition system, the working principle of the two is basically similar, but the low-voltage circuit of the two is somewhat different, the general car has a battery, so the car is the battery ignition system, aircraft, tractors, small gasoline engines use the magneton ignition system.

The ignition system is a very important part of the car, once a part of the ignition system is damaged, it will affect the engine work.

The ignition system is mainly composed of power supply (battery and generator), ignition switch, ignition coil, capacitor, cut-off, power distributor, spark plug, damping resistance and high-voltage wire, etc., and the ignition mold is used to control the opening and closing of the instrument circuit, the primary circuit of the ignition system and the relay circuit of the starter.

The ignition coil acts as an automatic transformer and is used to convert the 12V, 24V or 6V low-voltage DC power supplied by the power supply into 15 20kV high-voltage direct current. The distributor is composed of a cut-off, a distributor, a capacitor and an ignition pre-adjustment device. It is used to turn on and cut off the primary circuit of the ignition system when the engine is working, so that the secondary winding of the ignition coil generates high voltage, and according to the ignition time and ignition sequence required by the engine, the high voltage generated by the ignition coil is distributed to the spark plug of the corresponding cylinder.

The power breaker is mainly composed of a power breaker cam, a power breaker contact, and a movable contact arm of the power breaker. The cut-off cam is driven by the engine camshaft and rotates at the same speed, i.e., the engine crankshaft rotates twice every two weeks, and the cut-off cam rotates once per week.

The power distributor consists of a distributor cover and a distributor head. A spark plug used to distribute the high-voltage electricity generated by the ignition coil to each cylinder. There is a central electrode and a plurality of side electrodes on the distributor cover, and the number of side electrodes is equal to the number of cylinders of the engine.

The fire distributor head is mounted on the camshaft of the distributor and rotates together with the distributor shaft.

Photo by Q&A) Mercedes-Benz S-Class Ideal One Buick GL8 Xpeng P5 Xpeng Motors P7 Xpeng G3 @2019

The ignition system consists of a battery, an ignition switch, an ignition coil, an ignition control module, a high-voltage line, a spark plug, etc. Vertical.

When the compression of the steam fiber carrying engine is close to the top dead center, the combustible mixture is ignited by the spark muvolt plug, so as to burn the external work, for this reason, the combustion chamber of the gasoline engine is equipped with a spark plug. The function of the ignition system is to generate a spark with sufficient energy between the two electrodes of the spark plug at regular intervals according to the working sequence of the cylinder. Hope!!

The ignition system usually consists of a battery, a generator, a distributor, an ignition coil and a spark plug, etc.; It is divided into traditional ignition system and electronic ignition system. The ignition system is an important part of the gasoline engine, and the good performance of the ignition system has a great impact on the power, fuel consumption and exhaust pollution of the engine. All devices capable of generating an electric spark between the two electrodes of the spark plug are called engine "ignition systems".

The composition of the electronic ignition system is as follows:

1. The electronic ignition system generally adopts a closed magnetic ignition coil. The closed magnetic type uses an iron core like a rolling core to wind the primary coil, and then wraps the secondary coil outside, and the magnetic field lines form a closed magnetic circuit from the iron core. The advantages of closed magnetic ignition coil are less magnetic flux leakage, small energy loss, and small volume;

2. The distributor is composed of a power breaker, a power distributor, a capacitive laugh cover device and an ignition pre-adjustment device. The distributor handles multiple jobs. The first job is to distribute the high pressure from the coil to the correct cylinder.

This is done by the lid and rotor. The coil is connected to the rotor, which turns inside the lid. The rotor turns through the contacts of each cylinder.

As the tip of the rotor passes through each contact, the coil generates a high-voltage pulse. The pulse impinges through the gap between the rotor and the contacts (they are not really in contact) and then continues through the spark plug wire, onto the spark plug of the corresponding cylinder;

3. Spark plugs, commonly known as fire nozzles. Its function is to send a pulse high-voltage electrical discharge from the high-voltage wire (nozzle wire) to break through the air between the two electrodes of the spark plug and generate an electric spark to induce the mixed gas in the gas cylinder. Basic conditions for a high-performance engine:

High energy and stable spark collision preparation, evenly mixed mixture, high compression ratio;

4. The ignition controller is the actuator of the engine control system, and its function is to control the on-off of the primary winding circuit of the ignition coil through the conduction and cut-off of the internal high-power transistor according to the command signal sent by the microcomputer, so that the ignition coil generates high voltage;

5. The ignition signal generator is a sensor that converts non-electric power into electric power, which converts the angle of the crankshaft of the automobile engine or the position of the piston in the cylinder into the corresponding electrical pulse signal in a certain way, and finally sends it to the electronic controller to control the on-off of the primary circuit and generate an ignition signal;

6. The ECU of the electronic control unit is to calculate, process and judge according to the information input from the sensors of the engine and the data and programs of the memory, and then output the command to control the electronic ignition controller to achieve the purpose of accurately controlling the ignition of the engine.