摘要
冷起动是发动机排放CO、HC和NOX等有害物最为严重的一个阶段。而在冷起动阶段,不同的环境、不同的时间、不同的状况、不同的燃油品质等,其排放值大小又各不相同,故排放法规中对此多作了相应的规定。而就发动机的均温时间(停机时间)对冷起动排放的影响展开研究,并通过试验及过程分析,定性地得出结论,对控制发动机有害物质的排放具有十分积极的意义。
The cold-start is the most serious stage in which harmful substance of engine such as CO,HC and NOX etc emits. In this stage,the emission value is not identical in different environments,different time,different state and different fuel oil characters etc. So it is significant for harmful substance control of engine to be researched on influence of equal temperature time playing on emission of engine in cold-start,and getting qualitative conclusion through analysis on test and course.
出处
《交通标准化》
2005年第2期57-59,共3页
Communications Standardization
关键词
均温时间
CVS系统
废气稀释
定容采样
文丘里管
数据采集
equal temperature time
constant-volume sampling system
exhaust gas dilution
constant-volume sampling
critical flow venture
data gathering
