Diesel Injector Fuel Injector 0445120114 Bosch for Dodge RAM 2500 5.9L Cummins Turbo Diesel I6 enginel)

Effect of Double Injector on Combustion Process in a 396 Series Diesel Engine (part 7)

5 Conclusion

The injection system of the 396 series diesel engine with flat-top convex basin combustion chamber is improved and a dual-injector is adopted in each cylinder. A 3D combustion model is established for simulated calculation and analysis of the combustion process of the engine when the 5-hole and 8-hole injectors and 4-hole dual-injector are adopted.

The following conclusions can be drawn based on the parameter characteristics of the base engine: (1) The result of the case adopting 4-hole dual-injector shows that, when compared with the case of adopting 8-hole injector, the spatial distribution area of the fuel is widened, the mixing effect between fuel spray and air in cylinder is intensified, and the combustion is relatively complete, so the combustion process of the case of adopting 8-hole injector is improved. (2) The result of the case of adopting 4-hole dual-injector shows that, when the injection duration is shortened, the ignition delay period is slightly shortened, the peak combustion heat release rate, the maximum combustion pressure and the maximum average temperature in cylinder are increased, the combustion heat release is concentrated, the accumulated heat release is equivalent, and the NO emission is significantly increased. (3) The result of the case of adopting 4-hole dual-injector shows that the proper injection duration shall be selected based on comprehensive consideration of the pressure in cylinder, effective power and NO emission. According to the operation parameters and structural characteristics of the 396 series diesel engine, 22°CA injection duration is more suitable.

6  Acknowledgments

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was financially supported by Discipline and Master's Site Construction Project of Guiyang University by Guiyang City Financial Support Guiyang University [JX-2019], Supporting Program for Top Scientific and Technological Talents in Universities of Guizhou Province (No.[2018] 062), the Science and Technology Foundation of Guizhou Province (No.[2018]1006) and Key Construction Projects of the First Class University (Phase I) of Guizhou Province in 2017- the First Class Course(No.2017158418 and No.2017158435).