直喷式柴油机喷油特性的测试分析  

Measurement and Analysis of Fuel Injection Characteristics of a Direct Injection Diesel Engine

作　　者：乔信起[1] 宋永臣[2] 颜淑霞[3] 高希彦[2] 陈家骅[2] 黄震[1] 

机构地区：[1]上海交通大学机械与动力工程学院 [2]大连理工大学动力工程系 [3]上海交通大学人事处

出　　处：《农业机械学报》2004年第3期37-40,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：高等学校博士学科点专项科研基金资助项目 (项目编号 :9414 116)

摘　　要：为分析柴油机的燃烧过程和性能 ,在喷油泵试验台上用 W.Bosch长管法研究了喷油过程。介绍了试验装置和原理 ,分析了测试精度。试验结果表明 :喷油管内气泡产生与压力波尾部形状有关 ;长管内残余压力很低 ,燃油声速接近理论声速 ;喷油率图近似于梯形 ,燃油喷射呈“先急后缓”的特征 ;喷油压力、喷油始点、喷油持续角和喷油率均取决于柴油机转速和负荷。In order to analyze the combustion process and performance of a diesel engine,the fuel injection process was investigated by using W.Bosch long-tube method on an injection pump test stand. The measuring apparatus and the measuring principle and accuracy were presented. The experimental results show that the bubble emergence in high-pressure line relates to the tail configuration of the pressure wave,the residual long-tube pressure is very low,and the sound speed in the tube approaches the theoretical value. The injection rate pattern approximates a trapezoid with a steep front lateral side and a gentle back one. The injection pressure,timing,duration and rate depend on the engine speed and load.

关 键 词：直喷式柴油机 喷油特性 测试分析 W.Bosch长管法 试验装置 

分 类 号：TK423.8[动力工程及工程热物理—动力机械及工程]