444 エタノール混合ガソリンエンジンにおける排気再循環の適用 : 再循環ガス温度の影響(環境関連技術)

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  • 444Effects of EGR Temperature on Performance and Emissions of SI Engine fueled with Ethanol : Gasoline Mixture
  • エタノール混合ガソリンエンジンにおける排気再循環の適用(再循環ガス温度の影響)
  • エタノール コンゴウ ガソリンエンジン ニ オケル ハイキ サイジュンカン ノ テキヨウ(サイジュンカン ガス オンド ノ エイキョウ)

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Ethanol-enriched gasoline plays an important role in reducing fossil fuel by enabling the increase of thermal efficiency in gasoline engine. The object of this study is to experimentally evaluate a performance and exhaust emissions Of a single-cylinder, four stroke, naturally aspirated type gasohne engine with hot EGR for NOx control operating on ethanol mixing gasoline (E0-E50). The combustion characteristics such as specific fuel consumption, thermal efficiency, exhaust temperature and emissions of NOx, CO, HC, CO_2, HCHO are compared with those of JIS K2202 #2 regular gasoline. Experimental results are as follows, (1) NOx concentrations and exhaust gas temperature increase with increase of ethanol ratio in gasoline/ethanol engine, (2) EGR enables to reduce the NOx concentrations significantly and the emissions Of CO , HC for E25, E50 are lower than the case of regular gasoline. The use of hot EGR has positive effects on improvement of fuel evaporation.

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