The electrical plate of the spark plug ignites the mixture in the cylinder through repeated and continuous energy production. At that time, other parts of the ignition system generate timely high-voltage electrical pulses to form sparks and generate explosions. provide the engine power and produce the necessary energy.
The structure of the spark plug consists of a thin metal plate passing through an insulating ceramic material. There is a metal shell around the bottom of the insulator, which is tightly spiral screwed. At the cylinder head, an electrode is welded to the bottom of the metal shell to form a grounding effect with the car body. Additionally, the center end of the electrode must be separated by a tiny discharge gap.
Then the high voltage current from the distributor will conduct electricity through the center electrode and then dischargera in the discharge space at the bottom. At that time, the spark plug will work to generate sparks to burn. mixture, and the engine will get energy and power output.
Detailed information:
Precautions for disassembly and assembly of spark plugs
1. The area around the screws, spark plug electrodes and gaskets should be kept clean, dry and free of oil, otherwise it will cause current leakage, leakage air, weakening of sparks and other faults.
2. Be careful when disconnecting the high voltage wire connector and do not forcefully shake the spark plug insulation during operation, otherwise the sealing performance of the spark plug will be destroyed.
3. The engine can be disassembled once cooled. After loosening the spark plug to remove, use a hoseend to blow the dirt around the spark plug one by one to prevent dirt from escaping. fall into combustion after unscrewing the spark plug inside.
4. Tighten to the required torque. If it is too loose, it will cause air leakage. If it is too tight, the gasket will lose its elasticity, which will also cause air leakage. Since the tapered spark plug does not require a seal, it is particularly important to respect the tightening torque.
5. When installing, first use a sleeve to align the spark plug with the screw hole, then gently screw it in by hand until it is about half of the total thread length , then tighten it with a return lever. If the hand is not smooth when twisting, you need to go out and check whether the threads are aligned or whether there are any impurities contained in the threads. Do not tightenblindly to avoid damaging the screw holes and damaging the cylinder head, especially the aluminum alloy cylinder head. .
Baidu Encyclopedia-Spark Plug