HC2-2: EXPERIMENTAL ANALYSIS OF THERMAL EFFICIENCY IMPROVEMENT DUE TO HIGH EGR RATIO IN HCCI ENGINES FUELLED WITH DME AND NATURAL GAS(HC: HCCI Combustion,General Session Papers)
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概要
- 論文の詳細を見る
The effect of exhaust gas recirculation (EGR) on combustion characteristics and thermal efficiency has been investigated in homogeneous charge compression ignition (HCCI) engines using diesel engines with single- and multi-cylinder having compression ratios of 17.8 and 18.2 respectively. These HCCI engines were operated by natural gas premixed with a small amount of dimethyl ether (DME) as an ignition source. In the present study, the effect of EGR was focused on improvement in the brake thermal efficiency. It is noticed that the brake thermal efficiency higher than 4% was achieved by the high EGR ratio of 0.5 compared with the case without EGR, and almost equal improvements due to EGR are obtained in both single- and multi-cylinder engines. It is found that an increase in brake thermal efficiency due to EGR is based on the improvement in combustion efficiency mainly resulting from a significant reduction in the unburned hydrocarbon emission.
- 一般社団法人日本機械学会の論文
- 2008-07-28
著者
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Ueki H
Faculty Of Engineering Nagasaki University
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Ueki Hironobu
Graduate School Of Science & Technology Nagasaki University
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Ishida Masahiro
Graduate School of Science & Technology, Nagasaki University
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Sakaguchi Daisaku
Graduate School of Science & Technology, Nagasaki University
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Ishida Masahiro
Graduate School Of Science And Technology Nagasaki University
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Sakaguchi Daisaku
Graduate School Of Science And Technology Nagasaki University
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SAKAGUCHI Daisaku
Nagasaki University
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JUNG Sukho
Graduate School of Science and Technology, Nagasaki University
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Jung Sukho
Graduate School Of Science And Technology Nagasaki University
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