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수소 혼합에 따른 CNG 엔진 특성에 관한 연구 Experimental study on Combustion and Emissions characteristics with Hydrogen Enrichment in a CNG Engine

논문 기본 정보

저자정보
(한국기계연구원) (한국기계연구원) (한국기계연구원) (한국기계연구원) (한국기계연구원)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2010년 한국자동차공학회 학술대회 및 전시회
발행연도
수록면
542 - 547 (6page)
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수소 혼합에 따른 CNG 엔진 특성에 관한 연구
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    초록·키워드

    These day, in recent natural gas engine designs, blending hydrogen with compressed natural gas is considered. The mixture of CNG and hydrogen is named HCNG. Hydrogen allows leaner air-fuel ratio and retarded spark timing. These can reduce NOx considerably without use of exhaust after-treatment equipment. Hydrogen enrichment could significantly extend the lean operation limit and decrease burn duration. However, NOx emissions were increased with hydrogen addition at a certain air-fuel ratio due to hydrogen’s fast burn speed. Also hydrogen addition leads to a higher combustion temperature at a constant spark timing. If spark timing was optimized to MBT, the advantage of hydrogen’s high burn speedcan be taken without obvious increase in NOx emissions while the hydrogen fraction increases. In this study, the experiment were carried out to compare with CNG and H₂ fractions 30% of HCNG blends in aspect of the engine performances. The retarded spark timing was evaluated with HCNG at higher air-fuel ratios and. The results indicated that the NOx, THC, CO, CO₂ and CH₄ emissions were reduced with catalyst.

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      UCI(KEPA) : I410-ECN-0101-2013-556-001769595