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History of spark plug structure (2)

PubTime:2017-10-25

  3, nickel-based alloy and copper core electrode spark plug
  The most basic requirements for extending into the combustion chamber electrode are ablation (erosion and chemical corrosion) and good thermal conductivity.
  With the development of materials science and technology, the electrode material has experienced the evolution of iron, nickel, nickel base alloy, nickel-copper composite material and precious metal. Now the most commonly used is nickel-based alloy. In general, the thermal conductivity of pure metals is superior to that of alloys, but the chemical corrosion of pure metals (such as nickel) to the combustion gases and the solid deposits formed is more sensitive than alloys. Therefore, the electrode material is nickel-based to add chromium, manganese, silicon and other elements, chromium to improve the ability to resist corrosion, manganese and silicon to improve chemical resistance, especially for the great harm of sulfur oxidation resistance. Nickel-based alloys are less thermally conductive than copper, with copper cores and their nickel-based alloys (or other precious metal alloys) that will greatly improve the thermal conductivity of the electrodes.
  Domestic spark plug type suffix in the C on behalf of the copper core electrode, CC on behalf of the double copper core electrode.
  4, ordinary type and resistance type spark plug
  Spark plug as a spark discharge generator, is a broadband continuous electromagnetic radiation interference source. In order to suppress the strong interference caused by the electromagnetic radiation generated by the flashover to the radio field, to protect the radio communication and to prevent the malfunction of the vehicle electronic device, the world has accelerated the development of the resistance spark plug since the 1960s. China has also issued a series of mandatory electromagnetic compatibility of the national standard for the spark plug ignition engine-driven vehicle radio interference characteristics of the strict restrictions, so the demand for resistance-type spark plugs is also greatly increased. Resistive spark plug in the structure and the general type is not a big difference, just the insulator within the conductor sealant to resist the sealant.
  This article is organized by Guangzhou He Neng Auto Parts Co., Ltd.

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