直噴ディーゼル機関の燃焼室内熱損失のメカニズムに関する研究　第２報　　燃焼系パラメータの熱流れへの影響

木村 修二, 松井 幸雄, 小池 正生, 榎本 良輝

doi:10.1299/kikaib.63.3194

直噴ディーゼル機関の燃焼室内熱損失のメカニズムに関する研究　第２報　　燃焼系パラメータの熱流れへの影響

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タイトル別名

Study of Heat Rejection Mechanism of a Direct-injection Diesel Engine. 2nd Report. Effects of Combustion Control Item on Heat Flux.
チョクフンディーゼルキカンノネンショウシツナイネツソンシツノメ

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Experimental investigations are being conducted on a single-cylinder direct-injection diesel engine to examine the effects of combustion chamber specifications and swirl ratios on the heat release and transient heat transfer characteristics. Heat rejection was examined on the basis of heat release calculations using cylinder pressure time histories. Transient surface temperature data obtained from stationary locations in the piston and cylinder head were used as the basis for determining the transient heat flux rates. The results showed good agreement with the heat rejection calculated from cylinder pressure data and that transient heat flux in a piston cavity was reduced with the larger cavity diameter and a higher swirl ratio. On the other hand, a transient heat flux in a piston head was not changed by the cavity diameter and swirl ratio.