What is the structure of the ignition coil? What is the structure of an ignition coil?

The ignition coil is composed of the main coil, the secondary coil, the magnetic core, the switching triode and other auxiliary components, the main coil is charged by the battery, the secondary coil is discharged and the spark plug is ignited, and the triode is responsible for switching. The charging time is controlled by the battery voltage and engine speed to ensure that the energy of each charge is consistent, the ignition coil has two kinds: 3 wires and 4 wires, 3 wires are positive and negative for the power supply, and the switch controls the ECU instruction, and the 4 wires have an additional ignition detection line, which can detect whether the spark plug is ignited and whether there is a discharge current in the secondary coil.

To put it simply, the ignition coil is a transformer, that is, the voltage of tens of volts is raised to tens of thousands of volts, but the voltage input to the primary coil is provided by the electronic ignition.

2: The reason why the ignition coil burns out.

Mainly the aging breakdown of the insulation layer or the damage of the switching triode, the large spark plug gap will lead to the main coil load, large heating, fast aging of the insulation layer, small spark plug gap leads to large discharge current of the secondary coil, fast heating, fast aging of the insulation layer, the assembled ignition coil may have poor durability of insulating materials, large internal resistance of the coil and fast heating, and the life of the transistor will be shorter if the quality is not high.

If it is always burned out, and it burns out soon after replacement, and why?

Let's take a look at the problem of the generator first, if the power generation is too high, the load of the ignition coil is too heavy, it is easy to burn out, but if the power generation is too high, then the body electrical appliances, such as light bulbs, will often be damaged; Of course, the quality of the accessories is not ruled out, so it is best to measure the power generation first.

If the spark plug gap is too large, adjust the gap or replace the spark plug.

The quality of gasoline is not good, try to change to high-grade gasoline.

If the compression ratio of the cylinder is wrong, adjust the compression ratio.

If there is a program failure in the computer version, you can go to the repair shop and use the computer to test the car and clear the wrong information. If it doesn't work, it may be that there is a problem with your car's transmission.

The power supply voltage is unstable.

The resistance of the high voltage is abnormal, replace the high voltage line.

There is a short circuit in the secondary.

The ignition coil is overheated due to the high primary current of the ignition controller.

It does not work well when subjected to high temperature and high pressure waves.

There is a small chance that it is a problem with the coil itself, so you can try a different brand.

The ignitor manifold does not work well.

Hello, there are two sets of coils in the usual ignition coil, primary coil and secondary coil. The primary coil uses thicker enameled wire, usually about 200 500 turns of enameled wire about millimeters, and the secondary coil uses thinner enameled wire, usually about 15000 25000 turns of enameled wire about millimeters. One end of the primary coil is connected with the positive pole of the low-voltage power supply on the vehicle, and the other end is connected with the switchgear (cut-off).

One end of the secondary coil is connected with the primary coil, and the other end is connected with the output end of the high-voltage line to output high voltage.

It can be divided into open magnetic circuit ignition coil and closed magnetic circuit ignition coil.

1. When the primary coil is connected to the power supply, a strong magnetic field is caused around it with the growth of current, and the iron core stores the magnetic field energy;

2. When the switchgear cuts off the electrical-air-fuel circuit of the primary disturbance coil, the magnetic field of the primary coil is rapidly attenuated, and the secondary coil will induce a very high voltage;

3. The faster the magnetic field of the primary coil disappears, the larger the current at the moment of current cut-off, and the larger the turn ratio of the two coils, the higher the voltage induced by the secondary coil;

4. One end of the secondary coil is connected with the primary coil, and the other end is connected with the output end of the high-voltage line to output high-voltage electricity.

The ignition coil is equivalent to an autotransformer, which can convert 12V low-voltage direct current into high-voltage direct current. According to the different structural forms of the magnetic circuit, the ignition coil can be divided into two types: open magnetic circuit type and closed magnetic circuit type. Huisheng's traditional ignition system widely uses open magnetic circuit ignition coils, and closed magnetic circuit ignition coils are mostly used in electronic ignition systems.

The function of the ignition coil is to convert low-voltage electricity into 15000 40000 volts of high-voltage electricity to meet the needs of spark plug ignition. According to the different magnetic circuits and structures, the ignition coil can be divided into open magnetic circuit and closed magnetic circuit. Most of the traditional ignition systems use an open magnetic circuit ignition coil.

Closed magnetic circuit ignition coils are commonly used in high-energy ignition electronic ignition systems. (1) The basic structure of the open magnetic circuit ignition coil is as follows: it is composed of an iron core, a winding, a bakelite cover, a porcelain cup, etc.

The core is made of thick silicon steel sheets, and the core is wound with primary and secondary windings. The secondary winding is generally wound with a diameter of enameled wire for 11000 26000 turns; The resistance of the primary winding is outside, and the enameled wire is generally used 230 370 turns. One end of the secondary winding is connected to a spring blade in the high-voltage jack of the cover, and the other end is connected to one end of the primary winding; The two ends of the primary winding are connected to the low-voltage terminals on the cover, respectively.

Install a magnetically conductive steel sleeve between the winding and the bushing, and fill it with asphalt or transformer oil to reduce magnetic flux leakage, strengthen insulation, and prevent moisture ingress. (2) The structure of the closed magnetic circuit ignition coil is as follows: in the traditional open magnetic circuit ignition coil, the magnetic flux of the secondary winding in the iron core forms a loop through the magnetic conductive steel sleeve, and the magnetic field line passes through the empty Hu Qi up and down, the magnetic circuit reluctance is large, the magnetic flux loss is large, and the conversion efficiency is low (about 60%); The core of the ignition coil that closes the magnetic circuit is in the shape of "Yue" or "Kou".

The primary winding is wound inside the core, and the secondary winding is wound outside the primary winding. The iron core forms a closed magnetic circuit in which there is only a tiny air gap. The ignition coil of the closed magnetic circuit has less leakage, less magnetoresistance, less energy loss, and high conversion efficiency, which can make the ignition coil miniaturized.

The open and closed magnetic circuits of the ignition coil are shown in the following figure: (3) Model 1 of the ignition coilProduct**DQ stands for Ignition Coil, DQG stands for Dry Ignition Coil, DQD stands for Ignition Coil for Electronic Ignition System.

2.Voltage level 1-12V, 2-24V, use **1 - single-cylinder and regimental sail twin-cylinder engines 2 - four-cylinder and six-cylinder engines 3 - four-cylinder and six-cylinder engines (with additional resistors) 4 - six-cylinder and eight-cylinder engines (with additional resistors) 5 - six-cylinder and eight-cylinder engines 6 - engines above eight cylinders 7 - non-contact distributor 8 - high-energy collapse hail 9 - others (including three-cylinder, five-cylinder and seven-cylinder) 4Design serial number 5

Deformation**.

Similar to the transformer, this part can be adapted to the current engine, and the voltage of tens of amperes can be upgraded to tens of thousands of volts. Including main coils, cores, switching transistors, secondary coils and so on.

This is a structure, when ignition, this coil can be better ignited, the structure is very simple, there is an ignition coil inside, there is a switch device, and there is an increase in the energy of the ignition coil.

This is an important part of the car, and when it is connected to the spark plug, there will be a shortage of voltage. The core part is the ignition coil and switchgear, which will be connected to the spark plug to increase the energy of the igniter.

The ignition coil functions as follows:The additional resistor in the low-voltage circuit of the ignition coil is used to balance the high-voltage spark, and the magnetic field can reach saturation at low engine speed, and when the engine is high speed, due to the shortening of time, the magnetic field cannot achieve saturation, and the secondary voltage generated will be insufficient, and the spark will be weakened.

The ignition coil is divided into two types according to the magnetic circuit: open magnetic type and closed magnetic type, the traditional ignition coil is open magnetic type, and its iron core is stacked with silicon steel sheets of about millimeters, and the iron core is wound with secondary and primary coils. The closed magnetic type uses a similar iron core to wind the primary coil, and then winds the secondary coil outside, and the magnetic field line is formed by the iron core to form a closed magnetic circuit.

How often is the ignition coil replacedGenerally, it is replaced every 100,000 km. When a car engine is running, there is usually a high-voltage inrush current of nearly kV on the ignition coil. Because of its long-term work in a high-temperature, dusty, and vibrating environment, it will inevitably age and even be destroyed.

If it is not replaced immediately, it will affect the operating characteristics of the engine. However, when we say more than 100,000 kilometers, it is not a fixed replacement cycle time. Generally, as long as the ignition coil can work normally, and the surface is not obviously aged, it does not need to be replaced.