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  • Summary & Details

Effect of Increased Injection Rate on Thermal Efficiency and Output-Power under Supercharged Operation in Low-Pressure Direct-Injection Hydrogen Engines

低圧直噴水素エンジンの高噴射率化が過給運転時の熱効率と出力向上に与える影響

Detailed Information

Author(J)1) 箕田 賢太郎, 2) 新村 暢大, 3) 及川 昌訓, 4) 山田 聖哉, 5) 塚本 翔太, 6) 宮本 世界, 7) 三原 雄司, 8) 高木 靖雄
Author(E)1) Kentaro Minoda, 2) Nobuhiro Shimmura, 3) Masakuni Oikawa, 4) Seiya Yamada, 5) Shota Tsukamoto, 6) Sekai Miyamoto, 7) Yuji Mihara, 8) Yasuo Takagi
Affiliation(J)1) 東京都市大学大学院, 2) 東京都市大学大学院/川崎重工業, 3) 東京都市大学, 4) 東京都市大学大学院, 5) 東京都市大学大学院, 6) 川崎重工業, 7) 東京都市大学, 8) 東京都市大学
Affiliation(E)1) Tokyo City University, 2) Tokyo City University/Kawasaki Heavy Industries, 3) Tokyo City University, 4) Tokyo City University, 5) Tokyo City University, 6) Kawasaki Heavy Industries, 7) Tokyo City University, 8) Tokyo City University
Abstract(J)低圧直噴水素エンジンの高出力化に向けて過給を用いると,筒内圧上昇に伴う混合気形成の悪化によりNOxの増加が懸念される.本研究では,噴射率を高めた同一噴孔形状の噴射弁を用いて,高出力運転時の機関性能を評価した.その結果,高噴射率化により,高出力運転時の熱効率向上とNOx生成低減を実現した.

Translation

Abstract(E)Supercharging is an effective method for increasing the output of low-pressure direct-injection hydrogen engines. However, there are concerns that it may increase NOx emissions owing to worsened mixture formation. In this study, the engine performance under high-output operation was evaluated using injectors with the same nozzle hole geometries but different injection rates. The results confirmed that employing a high-injection-rate injector improved thermal efficiency and reduced NOx generation during high-output operation.

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