New Injector Nozzle Dlla157p1425 0433171887 for Fuel Injector 0445120049

The fuel injector is used to atomize the fuel into small droplets and inject them into the combustion chamber. It is an important part of the fuel supply system of diesel engine.

With the increase of diesel car production year by year, the problem of cold start of diesel engine and emission pollution has aroused wide attention, among which the cold start of diesel engine is the focus of research. Fuel atomization, combustion and emission of harmful pollutants depend on the performance of low temperature cold start, which will directly affect the working efficiency and service performance of the engine. It is found that cold start preheating can effectively reduce the wear of parts, improve fuel efficiency and reduce the emission of harmful pollutants. Due to its small size, simple structure and rapid heating, PTC material has attracted wide attention.

At present, the two kinds of PTC materials with the highest utilization rate are: ceramic based PTC material and polymer based PTC material. PTC (positive temperature coeffici ent) is a kind of thermistor with positive temperature coefficient. Its characteristic is that the resistivity is basically unchanged or changes little within a certain temperature range. When the temperature reaches a specific temperature (Curie temperature of the material), The resistivity increases rapidly by 103 to 109 orders of magnitude, which enables self-limiting heating to ensure that the fuel heated in the injector does not undergo a phase change beyond its boiling point during cold start-up.