New Concept for Simultaneous Improvement in Thermal Efficiency, Each Energy Losses and Exhaust Emissions in a Heavy Duty Diesel Engine

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  • 大型ディーゼルエンジンにおける熱効率，エネルギ損失およびエミッション同時改善コンセプト
  • オオガタ ディーゼルエンジン ニ オケル ネツ コウリツ,エネルギ ソンシツ オヨビ エミッション ドウジ カイゼン コンセプト

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Abstract

By means of a heavy duty single cylinder diesel engine equipped with multiple fuel injectors, direct control of heat release rate profile was possible through different air fuel mixture formation from that in conventional diesel engines equipped with a single fuel injector. As a result, both friction and cooling losses were reduced while keeping indicated thermal efficiency by maintaining the peak firing pressure and averaged in-cylinder temperature. Furthermore, simultaneous reduction in Smoke and NOx emissions without any deterioration in CO or THC emissions was achieved even under conventional diffusion combustion, not the low temperature combustion.

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