柴油机喷油器各孔喷射特性循环波动相关分析  

Correlation Analysis on Cycle-to-cycle Variation of Fuel Injection Characteristics for Each Hole of Diesel Engine Injector

作　　者：吴习文[1,2] 罗福强[2] 董少锋[2] 崔慧峰[3] 叶兵舰 

机构地区：[1]中国人民解放军镇江船艇学院,江苏镇江212003 [2]江苏大学汽车与交通工程学院,江苏镇江212013 [3]江铃汽车股份有限公司,江西南昌330001

出　　处：《车用发动机》2014年第5期67-71,共5页Vehicle Engine

基　　金：国家自然科学基金资助项目(51176068);江苏高校优势学科建设工程资助项目;江苏省博士创新基金(CXZZ12_0674);江苏省普通高校研究生科研创新计划项目(KYLX_1034)

摘　　要：测量100个循环喷油器各孔喷雾冲击力,计算得到了各孔喷油规律,分析了各孔喷油持续期、平均喷油率及循环波动随喷油泵转速和循环喷油量的变化,以及各孔喷油持续期、平均喷油率与对应循环喷油量的相关性。结果表明:对于柱塞式泵-管-嘴系统,随喷油泵转速的升高,各孔平均喷油率均值逐渐减小,其波动率逐渐减小;随喷油量的增加,平均喷油率均逐渐增加,波动率逐渐减小;随着喷孔轴线与针阀轴线夹角的增加,平均喷油率均值减小;各孔平均喷油率与循环喷油量具有较大相关性。The injection characteristics for each hole of injector was acquired by measuring 100 cycles ot spray moment. I ne variation of injection duration, mean fuel injection rate and cycle-to-cycle variation with fuel pump speed and fuel injection quantity, and their correlation with corresponding fuel injection quantity for each hole were analyzed. The results show that the mean fuel injection rate for each hole of plunger-type pump-pipe-nozzle system decreases and increases gradually with the increase of fuel pump speed and fuel injection quantity respectively, and its cycle-to-cycle variation both decrease with the increase of fuel pump speed and fuel injection quantity. In addition, the mean fuel injection rate decreases with the increase of angle between nozzle orifice axis and needle valve axis. Accordingly, the mean fuel injection rate for each hole has great correlation with fuel injection quantity.

关 键 词：柴油机 柱塞泵 喷油器 喷油特性 循环波动 相关性 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]