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A Study of the Impact of Methanol, Ethanol and the Miller Cycle on a Gasoline Engine

Author

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  • Luke Oxenham

    (Department of Engineering, Durham University, Durham DH1 3LE, UK)

  • Yaodong Wang

    (Department of Engineering, Durham University, Durham DH1 3LE, UK)

Abstract

This paper focuses on the investigation and optimisation of the Miller cycle, methanol, ethanol and turbocharging when applied to a high-performance gasoline engine. These technologies have been applied both individually and concurrently to test for potential compounding effects. Improvements have been targeted with regards to both emission output and performance. Also assessed is the capability of the engine to operate when exclusively powered by biofuels. This has been carried out numerically using the 1D gas dynamics tool ‘WAVE’, a 1D Navier–Stokes equation solver. These technologies have been implemented within the McLaren M838T 3.8L twin-turbo engine. The Miller cycle early intake valve close (EIVC) improved peak efficiency by 0.17% and increased power output at low and medium loads by 11%. Reductions of 6% for both NO x and CO were also found at rated speed. The biofuels achieved NO x and CO reductions of 60% and 96% respectively, alongside an efficiency increase of 2.5%. Exclusive biofuel use was found to be feasible with a minimum 35% power penalty. Applied cooperatively, the Miller cycle and biofuels were not detrimental to each other, compounding effects of a further 0.05% efficiency and 2% NO x improvements were achieved.

Suggested Citation

  • Luke Oxenham & Yaodong Wang, 2021. "A Study of the Impact of Methanol, Ethanol and the Miller Cycle on a Gasoline Engine," Energies, MDPI, vol. 14(16), pages 1-24, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:4847-:d:610950
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    References listed on IDEAS

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    1. Xuewei Pan & Yinghua Zhao & Diming Lou & Liang Fang, 2020. "Study of the Miller Cycle on a Turbocharged DI Gasoline Engine Regarding Fuel Economy Improvement at Part Load," Energies, MDPI, vol. 13(6), pages 1-26, March.
    2. Wang, Yaodong & Lin, Lin & Zeng, Shengchuo & Huang, Jincheng & Roskilly, Anthony P. & He, Yunxin & Huang, Xiaodong & Li, Shanping, 2008. "Application of the Miller cycle to reduce NOx emissions from petrol engines," Applied Energy, Elsevier, vol. 85(6), pages 463-474, June.
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    Cited by:

    1. Brian Gainey & Ziming Yan & John Gandolfo & Benjamin Lawler, 2022. "High Load Compression Ignition of Wet Ethanol Using a Triple Injection Strategy," Energies, MDPI, vol. 15(10), pages 1-23, May.
    2. Yangxun Liu & Weinan Liu & Huihong Liao & Hasier Ashan & Wenhua Zhou & Cangsu Xu, 2022. "An Experimental and a Kinetic Modelling Study of Ethanol/Acetone/Ethyl Acetate Mixtures," Energies, MDPI, vol. 15(9), pages 1-15, April.

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