Experimental and 3D, embedded modeling for diesel engine SCR deposit
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- 作者：F. Qian ; L. Lü ; T. Feng ; D. Yang
- 关键词：Key WordsDiesel engine ; Urea ; SCR ; Deposit ; 3D model ; Embedded model
- 刊名：International Journal of Automotive Technology
- 出版年：2017
- 出版时间：April 2017
- 年：2017
- 卷：18
- 期：2
- 页码：219-227
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Automotive Engineering;
- 出版者：The Korean Society of Automotive Engineers
- ISSN：1976-3832
- 卷排序：18
文摘
Nowadays, the selective catalytic reduction (SCR) is a promising solution to fulfill stringent nitrogen oxide (NOX) emission standards enforced by worldwide regulation bodies for lean burning engines. However, in the practical operation, urea deposits occur under unfavorable conditions, which bring about a failure of urea dosing strategy, affect the SCR system de-NOx performance and lowering the fuel economy by increasing the engine back pressure. This paper will present 3D deposit model, which can be used to predict the deposit position. Furthermore, a model-based controls strategy and calibration are designed. The comparison test results of both engine emission tests and vehicle field tests shows there is significant deposits improvement with the embedded model.