车用直喷柴油机递增负荷工况下的微粒排放特性  

Particulate Emission Behavior from an Automotive D.I.Diesel Engineunder Transient Operating Conditions of Increasing Load

作　　者：刘江唯[1] 刘忠长[1] 刘巽俊[1] 王忠恕[1] 

机构地区：[1]吉林大学内燃机系,吉林长春130025

出　　处：《内燃机学报》2002年第6期492-496,共5页Transactions of Csice

基　　金：国家自然科学基金资助项目(59976011);国家重大基础研究发展规划项目(2001CB209205)。

摘　　要：采用自行设计的柴油机微粒袋式取样系统对车用柴油机恒转速、增转矩工况下的微粒排放进行了研究。试验结果表明:在恒转速增转矩瞬态工况下,随着转矩增加率的增大,微粒及其不可溶成分和可溶性有机成分排放量均增加;高转速时转矩增加率对微粒排放的影响稍大。不可溶成分的增加是微粒排放量增大的主要原因,但转速较低时可溶性有机成分的增加也不容忽视。冷却介质温度较低时微粒排放量增大。Particulate emission behavior from an automotive DI diesel engine under several transient operating conditions of constant speed and uniformly increasing torque were experimentally studied with a bag sampling system developed by ourselves.Test results show that mass concentration of particulates including its dry soot and soluble organic fraction increases with increase of torque rise rate,and the increase of dry soot is the major contributor,but the increase of soluble organic fraction should be considered at low speed conditions.Lower coolant temperature leads to higher particulate emissions.

关 键 词：车用直喷柴油机 递增负荷工况 微粒排放特性 瞬态工况 

分 类 号：U464.172[机械工程—车辆工程]