High Quality Common Rail Diesel /Fuel Injector Nozzle DLLA145SM012

Fuel injector is the core part of engine fuel injection system, and its technical condition has great influence on the normal performance of engine. Because the injector working environment is extremely bad, directly exposed to high temperature and high pressure combustion

In the chamber, the oil film at the nozzle is prone to oxidation, polymerization and other reactions, resulting in carbon accumulation at the nozzle. Existing studies have found that carbon deposition in injector holes will lead to increased fuel injection flow loss, poor atomization and combustion quality, and decreased engine power and economy. Zhou Jianwei et al. studied the carbon deposition characteristics of the injector of direct injection gasoline engine and found that the carbon deposition degree of each hole of the injector was different, and the carbon deposition showed two morphologies: dry rough and wet smooth. Liaquat et al. analyzed the carbon deposition in jet holes of a single cylinder diesel engine after 250 h durability test, and found that carbon deposition was mainly distributed at the top of the injector, consisting of C, O, Zn and S.

Element composition. Barbour et al. analyzed the morphology characteristics of carbon deposit in the hole after cutting the injector hole of a certain diesel engine after working for 60 h, and found that there was a layer of coarse carbon deposit inside the injector hole of carbon deposit.

Kumagai et al. studied the influence of Zn element in the fuel oil of a single cylinder diesel engine on the carbon deposition in the jet hole, and found that whether Zn element was contained or not, there was more carbon deposition at the outlet side of the jet hole than at the inlet side, but when the oil contained Zn element, the carbon deposition particles in the hole were smaller and uniform in texture.