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The performance of the spark plug with the development of the automotive industry and continuous imp...
With the development of the automobile industry, the performance of the spark plug is also improving, in order to improve the quality of the work of the gasoline engine, for example, to improve the exhaust purification effect, using a wide gap spark plug (gap of 1.0 ~ 1.2mm); Radio noise, developed a non-interference spark plugs and so on. In the past, the life of the spark plug is very short, the car manufacturers regulations, the car driving 3 000 km (or 6 months) must check or replace the spark plug. With the spark plug and the improvement of the ignition device, coupled with some of the measures to clean the exhaust, the spark plug life greatly improved. It is generally stipulated that the vehicle must check or replace the spark plug after 10 000 km (or every 1 year) Platinum spark plugs longer life, usually in the car driving within 100 000 km without checking the replacement..........…
Spark plugs have good insulation and thermal conductivity, high mechanical strength...
Insulators must have good insulation and thermal conductivity, high mechanical strength, can withstand high temperature thermal shock and chemical corrosion. The shell is steel. The size of the hexagonal thread of the shell has been incorporated into the ISO international standard. The spark plug electrode includes a center electrode and a side electrode, with a spark gap between the two. The size of the gap directly affects the engine start, power, job stability and economy. Reasonable clearance is related to ignition voltage. The electrode material must have good resistance to electrical erosion (spark ablation) and corrosion (chemical - thermal corrosion), and should have good thermal conductivity. Between the center electrode and the wiring screw is a conductor glass sealant, it is necessary to be able to conduct electricity, but also to withstand the mixture of high pressure combustion, while ensuring its sealing.…
Spark plug working principle...
The other parts of the ignition system generate positive high voltage electrical pulses, which generate sparks and generate an explosion to provide the energy required for the engine power output.
The other parts of the ignition system generate positive high voltage electrical pulses, which generate sparks and generate an explosion to provide the energy required for the engine power output.
And the structure of the spark plug is made of an elongated metal plate through a ceramic material with an insulating function. The lower part of the insulator has a metal shell around it and is screwed to the cylinder head The bottom of the metal shell in the welding electrode and the car body to form a grounding effect. In addition, at the end of the center of the electrode, it must be separated by a slight discharge gap.
Then, the high-voltage current from the distributor will conduct through the central electrode and then discharge at the discharge gap at the bottom, and the spark plug will function to produce a spark-burning mixture. The engine will generate energy and output power.
It can be seen, the spark plug is to enter the engine combustion of gasoline and air mixed gas to ignite the device, working in high temperature, high pressure conditions, is one of the petrol engine consumables, it plays in the engine running quite Important role, and the fuel economy or not, the operation is smooth, have a great relationship.…
Types of car spark plugs...
1, quasi-type spark plug: insulator skirt slightly into the shell end, side electrode in the shell outside the face, is the most widely used one.