浅谈柴油机满足国IV两条技术路线

近年来，随着人们对环境保护的日趋重视，世界各国对内燃机废气排放的要求变得越来越严格，轻型柴油车开始实施国Iv标准。目前由于机内排放控制并不能完全起到净化效果，因此对已排出燃烧室但尚未排到大气中的废气进行处理，采取机外控制技术显得很有必要。PM和NOx是柴油机主要排放污染物，如何同时降低这两种尾气组成，达到国Ⅳ排放水平，是当今世界柴油机技术的难点和研究热点。本文介绍目前国内满足柴油机国IV排放标准的SCR和EGRDPF／DOC两种主流技术路线。通过对比分析两种系统的原理和优缺点得出适合国内发展的路线，并浅谈未来柴油机排放控制的发展方向。

On the diesel engine to meet the Euro IV two technical routes

In recent years, as people increasingly pay attention to environmental protection, the world of the internal combustion engine emissions requirements become more stringent, light diesel vehicles start to implement national IV standards. At present, because the machine can not be completely emission control and purify the effect, and therefore have not yet discharged into the atmosphere in the combustion chamber exhaust gas processing, taken out of the machine control technology becomes necessary. PM and NOx emissions of major pollutants in diesel engine, while reducing both how the composition of the exhaust gas to reach the country IV emission levels, is a difficult and hot topic in today＇s world of diesel engine technology. This article describes the current domestic diesel engines meet Euro IV emission standards SCR and EGR DPF/DOC two mainstream technology roadmap. Through comparative analysis of the principles and advantages and disadvantages of both systems Good for domestic route development and future direction Talking diesel emissions control