可变进气正时降低汽油机冷起动排放的研究  

Research on Emission Reduction of Gasoline Engines during Cold-Start by Variable Intake Valve Timing

作　　者：王巍[1] 于秀敏[1] 赵弘志[2] 

机构地区：[1]吉林大学 [2]中国第一汽车集团公司技术中心

出　　处：《汽车技术》2010年第10期5-8,共4页Automobile Technology

摘　　要：对一款可变进气正时的发动机进行冷起动性能测试,研究了进气门开启时刻对冷起动过程排放的影响。结果表明,推迟进气门的开启时刻(负进气提前角)有利于冷起动阶段HC、CO排放量的降低,且进气相位为362.5°和372.5°的HC和CO排放量较其他角度略低。简述了推迟进气门开启时刻可以降低排放物的主要原因。Cold start performance test is made to a gasoline engine with variable intake valve timing,and the influence of intake valve opening timing on emission during cold start is studied.The results showed that retarded intake valve timing（negative intake valve timing） is beneficial to reducing emission of HC and CO during cold start,and compared with other degrees,the emission at intake valve timing of 362.5° and 372.5° is slightly lower.The main cause of reduced emission by retarded intake valve timing is outlined in the paper.

关 键 词：汽油机 可变进气正时 冷起动 排放 

分 类 号：U464.171[机械工程—车辆工程]