A Study of the Factors Influencing HCCI Combustion in an Over-Expansion Cycle Engine

HCCI 燃焼に及ぼす超過膨張サイクルの影響要因の検討

This study analyzes the factors influencing the thermal efficiency of HCCI combustion in an over-expansion cycle engine. There are many influencing factors when combining the over-expansion cycle and HCCI combustion since 80 experimental conditions were included when varying compression ratio, expansion ratio, intake air temperature and equivalence ratio. The combustion efficiency is shown to be one of the dominant factors. Since the correlation coefficient between the combustion efficiency and ISFCg was -0.90. The over-expansion cycle is also shown to be effective to improve the thermal efficiency. The late-closing of intake valves contributes to extending the operating range of HCCI combustion.本研究では,HCCI 燃焼における超過膨張サイクルの熱効率に影響する要因を検討する.HCCI 燃焼と超過膨張サイクルの2 つを組み合わせ,圧縮比,膨張比,吸気温度,当量比を変化させた80 条件を検討した.そこで,燃焼効率が1 つの重要な要因であることが明らかとなった.また,超過膨張サイクルは熱効率増大に有効であり,HCCI燃焼の運転範囲拡大にも繋がることが明らかとなった.


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  • Accession Number: 01666799
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jan 31 2018 3:19PM