20502 高過給・広域多量EGRのディーゼル燃焼における多段噴射の効果(エネルギー・環境問題に対応するエンジン・燃料技術(1),OS.11 エネルギー・環境問題に対応するエンジン・燃料技術)

概要

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The recently investigated CO_2 advantages of automobile diesel engines are an effective countermeasure against global warming. Diesel engines must also give lower exhaust emissions such as NOx and particulate matter (PM). The authors have made reductions in these emissions using high-boost pressure and high-fuel-injection-pressure methods, along with a broad range and high rate of exhaust gas recirculation (EGR). In this study, multistage injection such as pilot injection and after injection was applied to high boosted and wide range EGR diesel combustion. The effect of multistage injection was evaluated to compare with single injection. And also the effect of after injection timing on the formation of Smoke was investigated by using high-speed video camera. At high boosted and high rate EGR, pilot injection is effective to reduce Smoke compare to single injection. Also after injection can improve BSNOx and Smoke.
2009-03-05