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  • Summary & Details

Achievement of Medium Speed and Load Premixed Diesel Combustion with Variable Valve Timing

可変バルブタイミングによる予混合ディーゼル燃焼の中速中負荷域への適用

Detailed Information

Author(J)1) 村田 豊, 2) 川野 大輔, 3) 草鹿 仁, 4) 大聖 泰弘, 5) 鈴木 央一, 6) 石井 素, 7) 後藤 雄一, 8) 小高 松男
Author(E)1) Yutaka Murata, 2) Jin Kusaka, 3) Yasuhiro Daisho, 4) Daisuke Kawano, 5) Hisakazu Suzuki, 6) Hajime Ishii, 7) Yuichi Goto, 8) Matsuo Odaka
Affiliation(J)1) 早稲田大学大学院, 2) 交通安全環境研究所, 3) 早稲田大学, 4) 早稲田大学, 5) 交通安全環境研究所, 6) 交通安全環境研究所, 7) 交通安全環境研究所, 8) 交通安全環境研究所
Affiliation(E)1) Waseda University, 2) Waseda University, 3) Waseda University, 4) National Traffic Safety and Environment Laboratory, 5) National Traffic Safety and Environment Laboratory, 6) National Traffic Safety and Environment Laboratory, 7) National Traffic Safety and Environment Laboratory, 8) National Traffic Safety and Environment Laboratory
Abstract(J)可変バルブタイミングによる吸気バルブの遅閉じは,圧縮端の雰囲気温度を制御することができ,軽油の予混合化を促進した上での着火時期の制御が可能となることがわかった.この技術をEGR,過給と組み合せることは,中高負荷運転域におけるNOxと黒煙の同時低減を実現するひとつの指針となりうることを示した.

Translation

Abstract(E)A variable valve timing (VVT) mechanism was used to realize premixed charge compression ignition (PCCI) combustion to improve both emissions and thermal efficiency in a light duty diesel engine. By means of late intake valve closing, compressed gas near the top dead center could be lowered, thereby increasing ignition delay to enhance premixed charge. The VVT mechanism combined with EGR and supercharging systems could simultaneously reduce NOx and smoke, extending the operating region of PCCI combustion to higher load conditions.

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