Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Limit Compression Ratio of Knock Occurring by $R_{dH2}$ in the Heavy Duty Hydrogen-CNG Fueled Engine

대형 수소-천연가스 기관의 수소첨가율에 따른 노크발생 한계압축비

  • Kim, Yong-Tae (Graduate School of Sungkyunkwan University) ;
  • Lee, Jong-Tai (School of Mechanical Engineering, Sungkyunkwan University)
  • Published : 2006.03.01
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Abstract

A heavy duty hydrogen-natural gas fueled engine can obtain stable operation at ultra lean conditions and reduce emissions extremely. Reduction of $CO_2$ in its engine is one of the most benefit. In this study, rate of hydrogen addition($R_{dH2}$) and compression ratio($\varepsilon$) were investigated including performance of this engine. As results, it was found that phenomenon of pressure oscillation when increasing $R_{dH2}$ and $\varepsilon$, it means occurring knock. It consider that pressure oscillation was increased due to fast burning speed of hydrogen. Even if same compression ratio, pressure oscillation was remarkable increased according to increasing $R_{dH2}$. Therefore, limit compression ratio of knock occurring was reduced by increasing $R_{dH2}$.

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References

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