进气涡流对车用直喷式柴油机瞬态工况下微粒排放的影响  

Effect of Intake Swirl on Particulate Emission from an Automotive D.I.Diesel Engine Under Transient Operating Conditions

作　　者：刘忠长[1] 刘巽俊[1] 张兆合[2] 

机构地区：[1]吉林工业大学内燃机工程系,长春130025 [2]解放军汽车管理学院

出　　处：《内燃机学报》2000年第2期153-155,共3页Transactions of Csice

基　　金：国家自然科学基金 !(5 96 76 0 2 8);中国高等教育博士学科点专利基金! (970 1 85 0 6 )资助项目

摘　　要：用自行设计的喷气式可变涡流进气系统 ( AIVSIS)调节气缸内的涡流水平 ,试验研究了进气涡流对车用直喷式柴油机恒转速增转矩瞬态工况下微粒排放的影响。结果表明 ,对于一定涡流比的瞬态工况 ,随着转矩变化率的增大 ,柴油机的微粒排放量逐渐增加。涡流比越小 ,瞬态工况微粒的排放随转矩变化率增大的速率越高。相同转矩增长率的瞬态工况 ,随着涡流比的增大 ,柴油机微粒的排放量逐渐降低。提高恒转速增转矩瞬态工况气缸内的涡流强度 。Effect of intake swirl on particulate emission from under an automotive D.I.diesel engine under transient operating conditions was experimentally studied.In-cylinder intake swirl was changed by means of a self-designed air injection variable swirl intake system (AIVSIS).Test results showed that in the event the engine speed is constant at every swirl ratio the particulate emission increases with the increase of engine torque increase rate.At transient operating conditions with the same torque increase rate,the particulate emission decreases with the increase of swirl ratio.In the case of higher swirl ratio transient operating conditions,particulate emission increase rate is smaller with the increase of engine torque increase rate.Particulate emission can be improved using AIVSIS to increase the swirl level in the cylinder for the engine transient operating conditions that engine speed is constant and torque is increased continuously.

关 键 词：直喷式柴油机 车用发动机 进气涡流 微粒排放 

分 类 号：U464.172[机械工程—车辆工程] TK421.5[交通运输工程—载运工具运用工程]