Spark plugs have good insulation and thermal conductivity, high mechanical strength...

Release time: 2017-09-23 16:47:12

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.