Spark Plug for Automotive

The spark plug for automotive is a key component of the engine ignition system.The spark plug for automotive function is to ignite and ignite the mixture. The high voltage generated by the ignition coil breaks through the air between the positive and negative electrodes, form spark and generating a flame core to ignite the mixed gas in the cylinder, and then engine will start to operate.

The spark plug for automotive Structure: It is mainly composed of a central electrode, side electrodes, insulator, metal housing and connecting nuts, etc. The central electrode is connected to the wiring nut, and the current is introduced through this. The insulator wraps the central electrode to prevent current leakage. The metal housing is connected to the engine cylinder head and grounded. The side electrode is installed on the housing and maintains a certain gap from the central electrode.

One: The spark plug for automotive By material:

1.Nickel alloy spark plugs: They are widely used, have low cost and good durability, but they are prone to wear and need to be replaced regularly. They are suitable for general family cars.

2. Platinum spark plugs: They have superior performance compared to nickel alloys, with a high melting point, stable chemical properties, stable ignition energy, and a long service life. They are used in mid-to-high-end models.

3. Iridium spark plugs: They have strong ignition energy and fine electrodes, enabling rapid and precise ignition, enhancing engine power and fuel economy. However, they are relatively expensive and are often used in high-performance engines.

4. Double iridium spark plugs: Both the central electrode and the side electrode are made of iridium, further enhancing the ignition performance. They offer excellent cold start and acceleration performance, as well as a long service life.

Two:The spark plug for automotive Classified by appearance:

Standard spark plug: The insulator skirt is slightly retracted into the end face of the housing, and the side electrodes are outside the end face of the housing. It is the most widely used type.

2. Insulator protruding spark plug: The insulator skirt is relatively long and protrudes beyond the end face of the housing. It has the advantages of large heat absorption and good anti-fouling ability, and can be directly cooled by the intake air to lower the temperature. Therefore, it is not easy to cause hot ignition, and thus has a wide thermal adaptability range.

3. Fine-electrode spark plugs: Their electrodes are very thin. They are characterized by strong sparks, good ignition performance, and can ensure the engine starts quickly and reliably even in cold seasons. They have a wide thermal range and can meet various applications.

4. Conical seat type spark plug: Its housing and the threaded insertion are made into a conical shape, so it can maintain a good seal without a gasket, thereby reducing the volume of the spark plug and being more beneficial to the design of the engine.

5. Multi-pole spark plugs: The side electrodes are usually two or more. Their advantages are reliable ignition and the gap does not need to be adjusted frequently. Therefore, they are often used in gasoline engines where the electrodes are prone to erosion and the gap of the spark plugs cannot be adjusted frequently.

6. Edge spark plug: Also known as edge gap type, it is the coldest type of spark plug, with the gap between the center electrode and the end face of the shell being concentric.

In addition, in order to suppress the interference of the automotive ignition system to the radio, resistive and shielded spark plugs have been produced. Resistive spark plugs are equipped with a resistor of 5-10kΩ inside the spark plug, while shielded spark plugs use a metal housing to shield and seal the entire spark plug. Shielded spark plugs can not only prevent radio interference but also be used for waterproofing and explosion-proofing the occasion.

The spark plug for automotive Replacement cycle

The replacement cycle is affected by factors such as the material of the spark plugs, the operating conditions of the engine and the usage environment. Nickel alloy spark plugs are generally replaced every 20,000 to 30,000 kilometers. Platinum spark plugs should be replaced every 40,000 to 60,000 kilometers. Iridium and double-iridium spark plugs should be replaced every 60,000 to 100,000 kilometers. If a vehicle experiences difficulties in starting, reduced power, increased fuel consumption, etc., it may be due to a decline in the performance of the spark plugs, which need to be inspected and replaced in advance.