2421 二段噴射によるDI-PCCIディーゼル機関の出力範囲拡大に関する研究 : 回転速度に応じた噴射条件の選択(G07-3 エンジンシステム(3),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

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  • 2421 A Study for Expansion of Output Range in a DI-PCCI Diesel Engine by Two-Stage Injection : Adaptation of Injection Conditions to Varied Engine Speeds

抄録

The objective of present work is to obtain a strategy for adapting injection conditions to varied engine speeds in two-stage direct-injection PCCI operation in a diesel engine. To this end, an experimental study was conducted using a single-cylinder test engine varying first- and second-injection timings. The results indicate that problems of high maximum pressure rise rate at a low engine speed and low thermal efficiency at a high engine speed can be solved by adjusting injection timing. However, under a high engine speed condition, there remains a problem of increased CO emission.

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