【作者】

Robert Bank

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。ABSTRACT In the past, technology transfer took place from large bore diesel engines to smaller diesel engines, e.g. in commercial vehicles and passenger cars. This transfer contained for instance supercharging technologies, commonrail injection as well as operating and combustion processes. But technology transfer also occurred in the field of exhaust gas treatment systems. The best example of this is the ammonia SCR technology which was initially introduced for large bore diesel engines in the late nineties of last century and represents nowadays the standard application for denitrification of exhaust gas in smaller diesel engines in order to comply to actual emission regulations. However, after this initial transfer of technologies the specific boundary conditions for on-road applications, i.e. the superior fuel quality as well as the faster development cycles and more strict emission regulations led to faster development and implementation of the transferred technologies. With that several technologies appeared such as high pressure common rail injection systems, EGR concepts as well as new exhaust gas treatment concepts. In the field of small diesel engines this contains diesel oxidation catalyst (DOC), NOx storage catalysts (NSC), ammonia SCR catalysts and coated particulate filter (CDPF) systems with additional DOC or SCR coatings. Furthermore the exhaust gas systems were completed with sensors and actuators in order to guarantee efficiency and reliability as well as emission monitoring. The functionality of a state-of-the-art exhaust gas system is based on closed loop control using model based approaches within the control algorithms instead of open loop control or operation based on fixed maps. Thus even the most stringent emission limits can be fulfilled with high reliability and limited system costs.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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