Active fuel design—A way to manage the right fuel for HCCI engines

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• 作者：Zhen Huang ; Zhongzhao Li ; Jianyong Zhang ; Xingcai Lu ; Junhua Fang…
• 关键词：active fuel design ; HCCI ; gasoline ; n ; heptane ; engine ; combustion
• 刊名：Frontiers in Energy
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：10
• 期：1
• 页码：14-28
• 全文大小：3,545 KB
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• 作者单位：Zhen Huang (1)
  Zhongzhao Li (1)
  Jianyong Zhang (1)
  Xingcai Lu (1)
  Junhua Fang (1)
  Dong Han (1)
  
  1. Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  Energy Technology
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：2095-1698

文摘

Homogenous charge compression ignition (HCCI) engines feature high thermal efficiency and ultralow emissions compared to gasoline engines. However, unlike SI engines, HCCI combustion does not have a direct way to trigger the in-cylinder combustion. Therefore, gasoline HCCI combustion is facing challenges in the control of ignition and, combustion, and operational range extension. In this paper, an active fuel design concept was proposed to explore a potential pathway to optimize the HCCI engine combustion and broaden its operational range. The active fuel design concept was realized by real time control of dual-fuel (gasoline and n-heptane) port injection, with exhaust gas recirculation (EGR) rate and intake temperature adjusted. It was found that the cylinderto- cylinder variation in HCCI combustion could be effectively reduced by the optimization in fuel injection proportion, and that the rapid transition process from SI to HCCI could be realized. The active fuel design technology could significantly increase the adaptability of HCCI combustion to increased EGR rate and reduced intake temperature. Active fuel design was shown to broaden the operational HCCI load to 9.3 bar indicated mean effective pressure (IMEP). HCCI operation was used by up to 70% of the SI mode load while reducing fuel consumption and nitrogen oxides emissions. Therefore, the active fuel design technology could manage the right fuel for clean engine combustion, and provide a potential pathway for engine fuel diversification and future engine concept.