Why does the ignition coil leak electricity? Let's take a brief look at the ignition coil, a very important part of the ignition system. The ignition coil is actually a transformer with a primary winding inside, also called a primary coil, a secondary winding, a secondary coil, an iron core, an insulating substance, etc. The ignition coil can convert the 12-volt voltage of the car to a high voltage of 20,000 to 30,000 volts. The ignition system of the car uses this high-voltage electricity to ignite the mixture in the cylinder to provide power to the car.
The primary coil current is turned on and off by computer pulse control. When turned on, the primary inductance converts electrical energy into magnetic energy in the magnetic core. This stage is the period of crankshaft closing angle, the purpose is to store energy. The current cannot be too large, the time cannot be too long, otherwise the coil is too hot and consumes energy, the current cannot be too small, the time cannot be too short, otherwise the energy storage is insufficient.
When the current of the primary coil is interrupted, the magnetic energy is released from the secondary coil to generate a high voltage of 20kv~45kv. The primary generates a high voltage of more than 200v but no energy is consumed by the circuit. The secondary high voltage loads the ignition spark plug. The breakdown gas discharges between the electrodes to generate electric sparks and ignites the cylinder. Combustible gas mixture.
The working environment of the ignition coil is relatively harsh, and it needs to withstand high temperature and high pressure, so it is normal to wear. If you choose an ignition coil of poor quality, the wear speed will be accelerated, affecting the power and ignition performance of the car. Therefore, when replacing the ignition coil, we try to choose a better quality to avoid damage or leakage.