【摘要】 选取中国和日本的4种采用电控燃油喷射的汽油机轿车进行了冷起动过程HC和CO排放参数测试。试验结果表明,空燃比的有效控制仍是优化冷起动过程的重点和难点。提出控制冷起动过程排放的关键时段在起动后的30s,在此期间应设法对空燃比实施有效控制以及优化冷起动过程。更多还原

【Abstract】 In this paper, the CO and HC emissions parameters of the four kinds of electronic control fuel injection cars are detected during coldstart period. According to the results of detects, efficiently controlling airfuel ratio is important and difficult in optimizing coldstart period emissions. The key period of controlling coldstart period emissions is in the front of 30 s after coldstart. During this period, the four measurements could be used to efficiently control airfuel ratio and optimize coldstart period emissions.更多还原