“国内也在进一步研究机内净化技术,包括级温燃烧技术、二级增压技术等,采用这些技术后可以在机内使燃料充分燃烧,降低缸内温度,抑制高温富氧条件下氮氧化物的产生,并减少微粒排放。但是在现有技术条件下,很难在不借助后处理系统的条件下达到国Ⅳ排放标准,至于外国公司是否已经研发出更先进的机内净化技术来满足国Ⅳ排放要求,目前我还不太清楚。但是使用后处理系统(SCR、EGR+DPF)是主流的国Ⅳ技术路线,并且我认为这是 ”China is also further study of the machine purification technology, including the level of combustion technology, two supercharger technology, the use of these technologies can make the fuel within the machine to fully burn, reduce the cylinder temperature, inhibition of high temperature and oxygen enrichment of nitrogen Oxide production and reduce particulate emissions.But in the current state of technology, it is difficult to reach the national emission standards without the aid of aftertreatment system, as to whether foreign companies have developed more advanced in-machine purification technology to I am still not sure about the country IV emissions requirements, but the use of aftertreatment systems (SCRs, EGR + DPFs) is the dominant national IV technology route and I think it is