顶岸狭缝间隙对汽油机未燃 HC 排放的影响研究  

Investigation on the Effect of Top Land Crevices on Unburnt Hydrocarbon Emissions in Spark Ignition Engines during the Start and Warm up Period

作　　者：庞俊国[1] 刘明安[1] 潘克煜[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1998年第5期64-67,共4页Journal of Xi'an Jiaotong University

基　　金：福特-中国发展计划资助项目

摘　　要：通过对汽油机起动及怠速工况下活塞顶岸狭缝处瞬态温度的测量以及对瞬时未燃ＨＣ排放的测量，探索在该工况下未燃ＨＣ排放的主要影响因素以及顶岸狭缝间隙在总体未燃ＨＣ排放中所占的比例，为进一步研究降低火花发动机在起动及怠速工况下未燃ＨＣ的排放提供了依据．文中建立了火花点火发动机起动热机工况下顶岸狭缝间隙处未燃ＨＣ生成的数学模型．与实验结果相比较，证明该模型具有较高的准确性．In order to understand the factors which affect the hydrocarbon(HC) emissions and the effect of top land crevices during the start and warm up period, experiments are carried out to measure the top land surface temperature and the instantaneous HC emissions. A model to predict the unburnt HC formation in the top land crevices during the start and warm up period is established. The calculation results by the model show good agreement with the experimental results.

关 键 词：顶岸狭缝障隙 未燃HC 汽油机 废气排放 

分 类 号：TK411.51[动力工程及工程热物理—动力机械及工程]