105 ガソリン機関の高膨張比化が熱効率に及ぼす影響(熱機関II)

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  • 105 Effect of High Expansion Ratio on the thermal Efficiency in a S. I Engine

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In this study, the more-expansion effect is realized by changing the valve timing. Compared to early-closing, late-closing resulted in a higher thermal efficiency, and thus variation of late-closing was investigated. The expansion ratio was also varied and investigated. A thermodynamic analysis was made, and results showed reasonable agreement with the experimental data.

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