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승용디젤엔진에서 엔진 Map base 제어 로직을 이용한 Urea-SCR 최적 분사에 따른 NOx 저감율과 NH3 슬립에 관한 실험적 연구An Experimental Study on NOx Reduction Ratio and NH₃ slip through the Optimum Injection of Urea-SCR Using Engine Map based Control in light Duty Diesel Engine
- Other Titles
- An Experimental Study on NOx Reduction Ratio and NH₃ slip through the Optimum Injection of Urea-SCR Using Engine Map based Control in light Duty Diesel Engine
- Issue Date
- Sep-2009
- Publisher
- 한국자동차공학회
- Keywords
- DCU(Dosing Controller Unit-인젝터 제어 장치); FTIR(Fourier transform Infrared Spectroscopy-전자분광분석장비); Mass flow rate(배출가스의 질량 유량); Urea-SCR(요소 선택적 환원 촉매); DPF(Diesel Particulate Filter)
- Citation
- 한국자동차공학회 2009년도 추계학술대회, v.2009, no.09, pp 883 - 890
- Pages
- 8
- Indexed
- OTHER
- Journal Title
- 한국자동차공학회 2009년도 추계학술대회
- Volume
- 2009
- Number
- 09
- Start Page
- 883
- End Page
- 890
- ISSN
- 2713-7171
- Abstract
- In this study, a map- based Dosing Control Unit(DCU) has been developed for effectively reducing NOx emission and minimizing NH₃ slip rate in the Urea-SCR system. DCU mapping were based on inlet gas temperature, NOx and O₂ concentration in the exhaust for optimizing urea dosing rate. An engine bench test has been performed under ECE-15 mode which is major part of NEDC engine emission test mode. From the results of this work, it can be found that Nox emission could be dramatically reduced by 65% compared to DOC based exhaust system by using the map-based dosing control algorithm developed by this work. It can also found that this map-based dosing control algorithm could keep the averaged NH₃ slip below 4ppm for the various operating conditions. As a results, it can be confirmed that optimum injection strategy of urea solution is very effective way for urea-SCR exhaust system to maximize its deNOx performance and meet the future strict NOx emissions regulations.
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