413 車両運転パターンと走行燃費の関係(環境負荷低減のためのエネルギー変換技術II)(オーガナイズドセッション(c)環境負荷低減のためのエネルギー変換技術)

概要

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The vehicle fuel economy deteriorates at low temperature. The main reason is the increase of cooling loss and friction loss. Friction loss changes with cylinder wall temperature, and the indicated thermal efficiency increased with lowering the cylinder wall temperature. Since the cylinder wall temperature can be estimated by a simplified heat transfer model, fuel consumption during warm-up can be calculated from the equation between the indicated power and the indicated thermal efficiency. To confirm the validity of this method the vehicle fuel consumption was measured under actual running condition. The values calculated by this method indicate a good approximation to the experimental ones.
社団法人日本機械学会の論文
2000-09-25