低温环境下喷油参数对柴油机燃烧和排放的影响

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中图分类号：TK421 文献标识码：A DOI：10.7535/hbkd.2025yx04001

Influence of fuel injection parameters on combustion and emissions of diesel engine under low temperature environment

ZHU Hairong1，GUO Xuefang1，DI Zhipeng1，WANG Zhao （1.Schoolof Mechanical Engineering，Hebei Universityof Scienceand Technology，Shjiazhuang，Hebei O5oo18，China; 2.Hebei Tuopu Machinery Electric Company Limited，Shijiazhuang，Hebei O5ool8，China）

Abstract：Inordertostudytheimpactof diferentinjection parameters （numberof injectionholes，injectionangle，injection advanceangle）onthe in-cylindercombustionandemision performanceof diesel engineunderlow temperature environment，a thre-dimensional modelofacertaintypeof direct-injection diesel enginewas established，andcombustionsimulation was carriedoutfordiferentinjectionparametersofdieselengineunderlowtemperatureenvironment.Theresultsshowthatthe fuelinjectionparameters influencethefuelinjectionduration，thefuelspatialdistribution，theswirlinthepitatthebottomof the combustion chamber，the penetration distance and difusionangleof the fuel spray，the fuel-air mixing timeand mixing efect，whichwillafectthecombustionandemisionperformanceof thedieselengine；Thedieselenginecanobtainthebest power performance under low temperature environment when the numberof injection holes is 8，theinjection angle is 150∘ ，and the injection advance angle is 18°CA BTDC（before top dead center）. The mechanism of the influence of injection parameters ondieselenginecombustionandemission underlowtemperatureenvironmenthasbeenobtained，which providessome reference for the optimization of diesel engine injection parameters under low temperature environment.

Keywords：internal combustion engineengineering；diesel engine；fuel injectionparameters；combustion simulation；low temperatureenvironment

柴油发动机具有扭矩大、热效率高、输出功率大、运行可靠性高和燃料安全性好等优势，广泛应用于车辆、船舶动力、航空航天、农业机械、国防装备等诸多领域[1]。（剩余15401字）