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논문 기본 정보

자료유형
학술저널
저자정보
강석호 (건설기계부품연구원) 박은용 (테스크) 권오현 (대동공업) 김훈명 (한국자동차연구원) 강정호 (한국자동차연구원)
저널정보
한국동력기계공학회 동력시스템공학회지 동력시스템공학회지 제24권 제6호
발행연도
2020.12
수록면
51 - 58 (8page)
DOI
10.9726/kspse.2020.24.6.051

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It is a well-known fact that a urea-SCR system is a highly efficient after-treatment system for NOx reduction; however, it is advisable to reduce the time to reach the light-off temperature due to its sensitivities to the exhaust gas temperature. Therefore, an experimental study was conducted on the reduction of the time to reach the light-off temperature through the application of the thermal insulation on the after-treatment system and the resulting NO<SUB>x</SUB> reduction efficiency. The engine used in this study is a 74 kW diesel engine with a displacement of 3.8 liters, a common rail fuel injection system was applied, and the after-treatment system was composed of DOC, DPF, SCR and AOC. Every performance test was conducted on the non-road diesel engine"s certification test mode, NRTC mode, and the identical after-treatment systems and engines were used on the test except for the application of insulation. As a result, through the application of insulation on the after-treatment system, the temperature rise time of the SCR catalyst was shortened which made it possible to reach the urea injection start point more quickly, and the NO<SUB>x</SUB> emission was reduced. In addition, the rise of the SCR catalyst temperature by the applied insulation made the reduction reaction by NH₃ adsorbed on the catalyst in the low-temperature section activated which led to an 10.54% increase of NO<SUB>x</SUB> reduction efficiency.

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Abstract
1. 서론
2. 실험장치 및 방법
3. 실험결과
5. 결론
References

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