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A new six stroke single cylinder diesel engine referring Rankine cycle

Author

Listed:
  • Chen, Hao
  • Guo, Qi
  • Yang, Lu
  • Liu, Shenghua
  • Xie, Xuliang
  • Chen, Zhaoyang
  • Liu, Zengqiang

Abstract

Six stroke engine presented by Conklin and Szybist is an effective way to recover energy of exhaust gas by adding a partial exhaust stroke and steam expansion stroke. Characteristics of the engine are analyzed and its disadvantages are pointed out. A new six stroke diesel engine is presented here. It refers rankine cycle inside cylinder. Total exhaust gas is recompressed and at a relatively low back pressure in the fourth stroke water is injected to which maintains liquid phase until the piston moves to the TDC. At c′ 720 °CA (crank angle) the water becomes saturated. An ideal thermodynamics model of exhaust gas compression, water injection and expansion is constructed to investigate this modification. Properties at characteristic points are calculated to determine the increased indicated work. Results show that the work increases with the advance of water injection timing and the quality of water. The cycle is more efficient and the new engine has potential for saving energy. Moreover, it is forecasted that HC and PM emissions may reform with steam in reality and H2 is produced which will react with NOX.

Suggested Citation

  • Chen, Hao & Guo, Qi & Yang, Lu & Liu, Shenghua & Xie, Xuliang & Chen, Zhaoyang & Liu, Zengqiang, 2015. "A new six stroke single cylinder diesel engine referring Rankine cycle," Energy, Elsevier, vol. 87(C), pages 336-342.
    • Handle: RePEc:eee:energy:v:87:y:2015:i:c:p:336-342
    DOI: 10.1016/j.energy.2015.04.107
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    References listed on IDEAS

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    Cited by:

    1. Zhu, Sipeng & Liu, Sheng & Qu, Shuan & Deng, Kangyao, 2017. "Thermodynamic and experimental researches on matching strategies of the pre-turbine steam injection and the Miller cycle applied on a turbocharged diesel engine," Energy, Elsevier, vol. 140(P1), pages 488-505.
    2. Li, Lifu & Zhang, Zhongbo, 2019. "Investigation on steam direct injection in a natural gas engine for fuel savings," Energy, Elsevier, vol. 183(C), pages 958-970.

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