Automobile Spark Plug Product Types

1. Standard spark plug: the insulator skirt is slightly retracted into the end face of the shell, and the side electrode is outside the end face of the shell. It is the most widely used type.
2. Insulator protruding spark plug: The insulator skirt is longer and protrudes beyond the end face of the shell. It has the advantages of large heat absorption and good anti-fouling ability, and can be directly cooled by the inlet air to reduce the temperature, so it is not easy to cause hot fire, so it has a wide thermal adaptability range.
3. Thin electrode type spark plug: Its electrode is very thin, characterized by strong sparks and good ignition ability. It can ensure the engine starts quickly and reliably even in severe cold seasons. It has a wide thermal range and can meet a variety of purposes.
4. Cone seat type spark plug: Its shell and screw thread are made into a cone shape, so it can maintain a good seal without a gasket, thereby reducing the size of the spark plug, which is more beneficial to the engine design.
5. Multipolar spark plug: Generally, there are two or more side electrodes. The advantage is reliable ignition and the gap does not need to be adjusted frequently. Therefore, it is often used in some gasoline engines where the electrode is easy to ablate and the spark plug gap cannot be adjusted frequently.
6. Surface spark plug: namely surface gap type, it is the coldest type of spark plug. The gap between the center electrode and the shell end face is concentric.
In addition, in order to suppress radio interference from automobile ignition systems, resistive and shielded spark plugs were produced. Resistive spark plugs have a 5-10kΩ resistor inside the spark plug, while shielded spark plugs use a metal shell to shield and seal the entire spark plug. Shielded spark plugs can not only prevent radio interference, but can also be used in waterproof and explosion-proof situations.