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논문 기본 정보

자료유형
학술저널
저자정보
박영준 (국민대학교) 홍우경 (국민대학교) 가재금 (국민대학교) 조용석 (국민대학교) 주재근 (쌍용자동차) 김현옥 (쌍용자동차)
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제19권 제5호
발행연도
2011.9
수록면
118 - 124 (7page)

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To reach the Euro-6 regulations of PM and NO<SUB>x</SUB> for light-duty diesel vehicles, it will be necessary to apply the CDPF and the de-NO<SUB>x</SUB> catalyst . The described system consists of a catalytic configuration, where the CDPF is placed downstream of the diesel engine and followed by a urea injection unit and a urea-SCR catalyst. One of the advantages of this system configuration is that, in this way, the SCR catalyst is protected from PM, and both white PM and deposits become reduced. In the urea-SCR system, the injection control of reductant is the most important thing in order to have good performance of NO<SUB>x</SUB> reduction. The ideal ratio of NH₃ molecules to NO<SUB>x</SUB> molecules is 1:1 based on NH₃ consumption and having NH₃ available for reaction of all of the exhaust NO<SUB>x</SUB>. However, under the too low and too high temperature condition, the NO<SUB>x</SUB> reduction efficiency become slower, due to temperature window of SCR catalyst. And space velocity also affects to NO<SUB>x</SUB> conversion efficiency. In this paper, rig-tests were performed to evaluate the effects of NO<SUB>x</SUB> and NH₃ concentrations, gas temperature and space velocity on the NO<SUB>x</SUB> conversion efficiency of the urea-SCR system. And vehicle test was performed to verify control strategy of reductatnt injection. The developed control strategy of reductant injection was improved over all NO<SUB>x</SUB> reduction efficiency and NH₃ consumption in urea-SCR system. Results of this paper contribute to develop urea-SCR system for light-duty vehicles to meet Euro-5 emission regulations.

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Abstract
1. 서론
2. 실험장치 및 방법
3. 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-556-000491750