【摘要】 针对TU5JP4汽油机低温起动过程进行试验,分析研究了配气相位进气时刻的改变对内燃机低温起动及排放的影响.结果表明,适当推迟进气门打开时刻,改变进气门和排气门的重叠角,适当减少气缸内进气量,相对增大废气量,不仅使内燃机低温起动燃烧作功明显改善,起动持续时间减少,而且有利于降低内燃机低温起动产生的CO和HC废气量.更多还原

【Abstract】 With the help of TU5JP4Gasoline engine low temperature start process experiment,the effects of the intake time change of gas distribution phase on the low temperature start and its exhaust emission performance of internalcombustion engine are investigated and analysed.The results show that the appropriate delay of intake valve open timing,and hence the change of valve timing overlap of the intake valve and exhaust valve,and the proper decrease of in-cylinder fresh intake gas and increase of in-cylinder residual exhaust gas,can not only significantly improve the performance of internal combustion engine low temperature start combustion work,shortening start duration,can but also help to reduce the quantities of HC and CO emissions during the low temperature start process.更多还原