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Little knowledge about spark plugs
 
In order to improve the working life of the spark plug, the discharge of the electrode diameter of less than 1mm, such as platinum, iridium and other precious metal materials as the electrode spark plug came into being. Some spark plugs, in order to extend the life of the side electrode, so that the side electrode also has good electrical conductivity and thermal conductivity, the side of the electrode is also wrapped within the copper core.
Spark plug in the combustion chamber after the ignition is completed, the temperature can not be too high, not because of the spark plug itself is too high and cause early combustion. But the temperature can not be too low, otherwise, the spark plug can not be self-purification, easy to accumulate carbon fouling. The thermal performance of the spark plug can be determined by selecting the calorific value of the spark plug.
The spark plug itself does not produce heat, but it can, like a radiator, remove the excess heat from the combustion chamber and move it into the engine's cooling system. The heat dissipation of the spark plug is determined by the length of the insulation nozzle, the amount of gas surrounding the insulation, the material, the structure of the center electrode, and the structure of the ceramic insulator.



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