Analysis On The Performance Of Fuel Injector For High-pressure Common Rail Electronically Controlled Diesel Engine

The world’s growing awareness of environmental protection, people for the automobile engine in energy saving and pollutant control of the increasingly stringent requirements. Diesel engine has the advantages of low fuel consumption is, and in the discharge area, although the diesel exhaust CO, HC emissions are very low, but its particulate emissions of gasoline engine is very high, is several times or even more. Therefore, all the countries in the world adopt diesel vehicle and its emission control put forward more and more requirements. In order to meet the requirements of diesel engine exhaust emissions, diesel high pressure common rail fuel injection technology to meet this requirement, but also is the development direction of the diesel engine.High pressure fuel injection technology gradually by the automobile industry height seriously, our country also has a high pressure fuel injection system of research reports, but on electronically controlled high pressure common rail injection system compared with foreign countries far away. The fuel injection system of diesel engine is the core part, in order to achieve a low pollution, low fuel consumption and high power, high pressure common rail fuel injection system has a very important significance. While the fuel injector for high pressure common rail fuel injection system is one of the core components, the researchers focus on the object, but the development of technology has a certain degree of difficulty. This paper from the diesel high pressure common rail system composition and the principle of work and other aspects, for electronically controlled high pressure common rail system to analyze, study; then taking Jiangling pickup truck with0445110305electronic control injector fuel injection characteristic research topics, using contrast experiment method, using the German Bosch diesel fuel injection pump test bench and FSA740EPS815detecting instrument construction of high-pressure common rail injector bench test, to the injector air gap spacers as main object of study, by changing the thickness contrast analysis and discuss the effect of fuel injector fuel injection characteristic primary factor. The results show that:the injector gas gap gasket thickness changes to the discharge point, full load point, high pressure injection point three point of cycle fuel injection quantity has obvious effect. The comparison between the experiment data is further illustrated its influence is the change in triggering the onset time and off time, to realize the system control strategy optimization plays a certain role.