1, divided by spark plug electrode material:
Common ones are copper core, yttrium gold, platinum, iridium gold and platinum-iridium alloy. These materials themselves have good electrical conductivity. Among them, noble metal spark plugs have higher melting point, high temperature and high pressure resistance and better quality, so noble metal spark plugs can emit stronger and more stable sparks and have a relatively longer service life, which can be considered by car owners when replacing spark plugs. Generally, the original spark plugs of low-end cars are resistance spark plugs, while the original spark plugs of luxury cars and mid-to high-end models are mostly iridium spark plugs.
2. According to the number of spark plugs:
First-class spark plug, second-class spark plug, third-class spark plug and fourth-class spark plug (that is, we usually say one claw, two claws, three claws and four claws), the higher the series, the better the ignition performance.
Spark plug brand
There are dozens of brands of spark plugs in China, such as Zhuzhou Xiang Torch and Lightning, most of which are ordinary spark plugs. Foreign brands mainly include: bosch, a German Bosch company, which is mainly used in German series cars, with a market share of about 40%; Ngk, mainly used in Japanese cars (Nissan, etc. ), the market share is about 20%; Denso, produced by Denso Japan, is mainly used in Japanese cars and cars of major automobile manufacturers in the world, with a market share of nearly 20%. Champion, the American champion company, has a market share of about10%; Acdelco, produced by ac Deco Company, is mainly used in cars of American General Motors Company. Other brands are: autolite, Authelet Toto of America, eyquem, Yikang of France, etc. Others account for about 5%, and there are more than ten kinds of * * *.