燃烧室形状及喷油策略对柴油机排放的综合影响  

Combined Effects of Piston Bowl Geometry and Fuel Injection Strategies on Emissions of a Diesel Engine

作　　者：毛瑞卿 刘少康[1,2] 王斌 王言言 贾德鸣 MAO Ruiqing;LIU Shaokang;WANG Bin;WANG Yanyan;JIA Deming(State Key Laboratory of Intelligent Agricultural Power Equipment,Luoyang 471039,China;Luoyang Tractor Research Institute Co.,Ltd.,Luoyang 471039,China)

机构地区：[1]智能农业动力装备全国重点实验室,河南洛阳471039 [2]洛阳拖拉机研究所有限公司,河南洛阳471039

出　　处：《拖拉机与农用运输车》2024年第2期71-75,87,共6页Tractor & Farm Transporter

基　　金：混动/电动农机动力系统及智能控制单元关键技术研发与总成创制(2022YFD2001202)。

摘　　要：通过数值模拟的方法研究了活塞凹坑几何形状及喷油策略对柴油机排放的综合影响。活塞凹坑几何形状及不同喷油策略是影响直喷式柴油发动机油气混合、燃烧以及排放的重要因素。在保证活塞凹坑容积、发动机压缩比、总喷油量、总喷油持续时间不变的前提下,本文对三种不同的喷油策略及四种不同的活塞几何形状相结合的方案进行了研究,结果表明多次喷油及改变燃烧室形状对柴油机排放有着显著的影响。Piston bowl geometry and different fuel injection strategies are important factors affecting emissions in a DI diesel engine,which have been numerically analyzed in this paper.Under the premise of ensuring chamber volume,compression ratio,total injection amount and total injection duration,this paper analyses the emissions of a diesel engine with three different fuel injection strategies and four different piston bowl geometries.The results show that multiple injection and change of combustion chamber shape have a significant impact on diesel engine emissions.

关 键 词：燃烧室几何形状 喷油策略 多次喷油 污染物排放 直喷柴油机 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]