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Effects of Engine Load, Inlet Air Temperature, Valve Overlap and EGR on Diesel HCCI Engine

机译：发动机负荷，进气温度，气门重叠和EGR对柴油HCCI发动机的影响

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摘要

Homogeneous charge compression ignition (HCCI) engines are being considered as a future alternative for conventional engines, because they have a great potential to reduce NOx emission and maintain low PM emission of engines, while achieving higher thermal efficiency compared with SI engines. But, they also pose their own problems: high hydrocarbon and CO emissions and difficulties in control combustion process. In this paper, the HCCI engine is achieved by directly injecting diesel fuel into cylinder near the TDC position of exhaust stroke, which is very early compared with the fuel injection timing of conventional diesel engine. The effects of engine load, inlet air temperature, valve overlap and EGR on HCCI engine were studied. When the engine load or inlet air temperature increases, the start of combustion is advanced; inert gases contained in the EGR can delay the auto-ignition time; larger negative valve overlap also advance the combustion. Larger negative valve overlap can benefit fuel vaporization and make the smoke emission decreased. Larger EGR can slow the combustion rate and control the combustion process.
机译：均质充量压缩点火（HCCI）发动机被认为是常规发动机的未来替代方案，因为与SI发动机相比，它们具有减少NOx排放并保持发动机低PM排放的巨大潜力。但是，它们也带来了自己的问题：高碳氢化合物和一氧化碳排放以及控制燃烧过程的困难。在本文中，HCCI发动机是通过在排气冲程的TDC位置附近直接将柴油燃料喷射到气缸中来实现的，这与传统柴油机的燃料喷射正时相比非常早。研究了发动机负荷，进气温度，气门重叠和EGR对HCCI发动机的影响。当发动机负荷或进气温度升高时，燃烧开始。 EGR中包含的惰性气体会延迟自动点火时间；较大的负气门重叠也可促进燃烧。较大的负气门重叠可以使燃料汽化并使烟气排放减少。较大的EGR会降低燃烧速度并控制燃烧过程。

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  • 来源
  • 会议地点 Harbin(CN)
  • 作者

    Zhengguo Cai; rnYuushou Nakayama; rnTakeshi Shiono;

  • 作者单位

    Lei Shi@Key Laboratory for Power Machinery and Engineering of Education Ministry, School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China--Kangyao Deng@Key Laboratory for Power Machinery and Engineering of Education Ministry, School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China--Yi Cui@Key Laboratory for Power Machinery and Engineering of Education Ministry, School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China--Haiyong Peng@Key Laboratory for Power Machinery and Engineering of Education Ministry, School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China--;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 船舶工程;
  • 关键词

    HCCI; Diesel engine; Valve overlap; EGR;

    机译：HCCI;柴油机;气门重叠; EGR;

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