预喷参数对轻型车用高压共轨柴油机振动影响  

Effect of Pilot Injection Parameters on Vibration of High Pressure Common Rail Diesel Engine for Light-Duty Vehicles

作　　者：罗福强[1] 周靖 周立迎[1,2] 周志峰 LUO Fu-qiang;ZHOU Jing;ZHOU Li-ying;ZHOU Zhi-feng(School of Automotive and TrafEc Engineering,Jiangsu University,Jiangsu Zhenjiang 212000,China;School of Mechanical Engineering,Guizhou Institute of Technology,Guizhou Guiyang 550003,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212000 [2]贵州理工大学机械工程学院,贵州贵阳550003

出　　处：《机械设计与制造》2023年第5期109-112,共4页Machinery Design & Manufacture

基　　金：多孔喷油器各孔喷射特性对柴油机喷雾及燃烧影响的研究,黔科合基础[2018]1006。

摘　　要：以某一轻型车用四缸高压共轨柴油机为研究对象,研究了预喷参数对柴油机整机振动的影响。在不改变柴油机零部件的前提下,改变预喷油量和主、预喷时间间隔,对比分析各参数下柴油机整机的振动情况。试验结果表明:随着预喷油量的增加,整机振动变大。怠速工况下预喷对整机振动影响更为明显。预喷油量的确定必须要由主、预喷时刻以及循环喷油量共同决定才能实现减振;存在最佳主、预喷时间间隔使整机振动最小,并且这一时间间隔与喷油量及主喷时刻相关。Taking a four-cylinder high-pressure common-rail diesel engine of light-duty vehicles as the research object,the influence of pilot injection parameters on the vibration of the whole machine was studied.By changing the parameters of pilot injection quantity and interval of pilot-main injection timing,the influence of each parameter on the vibration was compared and analyzed on the premise of not changing the components.The test results show that with the increase of pilot injection quantity,the vibration of the whole machine increases.The effect of pilot injection on the vibration of the whole machine is more obvious at idle speed.The determination of the pilot injection quantity must be determined by the main injection timing,pilot injection timing and the circulating fuel quantity together in order to reduce the vibration of the whole machine.For minimum machine vibration,there is an optimal interval of pilot-main injection timing that is related to the quantity of fuel injection and the main injection timing.

关 键 词：预喷参数 高压共轨柴油机 振动 燃烧 压力升高率 

分 类 号：TH16[机械工程—机械制造及自动化] TK427[动力工程及工程热物理—动力机械及工程] TK421.2