【摘要】 介绍了废气再循环（ＥＧＲ）降低柴油机ＮＯｘ排放的原理和控制方法，考察了不同工况下柴油机废气污染物的排放分布情况，并进行了柴油机废气再循环的试验。试验结果表明，在柴油机稍作更改，成本增加不多的基础上，采用 ＥＧＲ能够较有效地降低 ＮＯｘ排放。更多还原

【Abstract】 The mechanism and coned measure to reduce ha have been described in this paper. The diesel engine exhaust emissions in different operation modes were examined. The tests of diesel engine with EGR have been carried out. The test results show that the Nox can be effectively improved by using EGR, while a little modification of the diesel engine is requital and the cost only slightly increases.更多还原