多缸汽油机怠速时HC、CO排放的缸间差异研究

基金项目:

北京市科技新星计划资助项目(XD1002K01)

国家留学回国人员基金资助项目(ZD1002K8)

详细信息

A Study on the Variational Emission of Unburned Hydrocarbon and Carbon Monoxide from Cylinders in S. I. Engine Under Idle Condition

College of Environment and Energy Engineering, Beijing Polytechnic University, Beijing, 100022

摘要: 采用与排放的常规测量方法(通常为排气总管取样)、不同的各缸分别取样测量方法,对492QC发动机怠速时的HC、CO排放及其缸间差异进行了研究.结果表明;试验用发动机各缸的CO排放差异不大,HC的排放差异很大,HC排放最大的为HC排放最小的10倍之多.如能使各缸的HC排放水平都能达到排放浓度最小,则发动机的HC排放可降低为由排气总管测得的HC体积分数的30%左右.
- CO排放 /
- HC排放 /
- 多缸发动机 /
- 怠速
Abstract: Experimental study was made on the different emission of unburned hydrocarbon and carbon monoxide from different cylinders in 492QC S.I. engine under idle condition. The sample of the hydrocarbon and carbon monoxide emission was taken from the exhaust port exit of each different cylinder, which shows that the difference of carbon monoxide emission from cylinder to cylinder is not large; while the difference of hydrocarbon emission is very large; in fact the hydrocarbon emission of No. 1 cylinder is the largest and the hydrocarbon emission of No. 4 cylinder is the least if the hydrocarbon emission of all the cylinders can be decreased to the level of No.4 cylinder, the hydrocarbon emission of the experimental engine will at least decrease to 30% of the volume fraction of HC measured at the general exhaust pipe.
- unburned hydrocarbon /
- carbon monoxide /
- S. I. engine /
- idle