Reduction of HC emissions at cold-start is a challenge in order to meet the future stringent regulations of ultra low emission vehicles ( ULEV ). 为适应欧以上汽车法规,对点燃式发动机冷起动工况下HC排放的研究已经成为目前发动机领域的热点之一。
Also mentioned the research progress on theoretical analysis of combustion, chemical kinetics mechanism, and theoretically analyzed the combustion process and mechanism of ultra low emission of DME. 叙述了燃烧过程的理论研究和化学反应动力学的研究状况,从理论上探讨了DME的燃烧过程及其实现超低排放(ULE)的机理。
A series of experience has shown that diesel engine could work more efficiently and softly with ultra low emission by DME. 在各种柴油机上的试验结果表明:二甲醚能够实现柴油机高效、超低排放(ULE)、柔和无烟燃烧。
Homogeneous Charge Compression Ignition ( HCCI ) combustion has advantages of low fuel consumption and ultra low NOx emission. However, the challenges from the autoignition control difficulty and narrow operation region limit the practical application of this technology. 汽油均质充量压缩着火(HCCI)燃烧能显著改善发动机燃油经济性、大幅度降低NOx排放,但存在着燃烧控制困难,负荷范围有限以及瞬态工况不易控制等问题。
Emission Control Technologies for Ultra - low Emission Vehicles 汽车尾气超低排放(ULE)控制技术