LAPSE:2023.20132
Published Article
LAPSE:2023.20132
A Study of the Impact of Methanol, Ethanol and the Miller Cycle on a Gasoline Engine
Luke Oxenham, Yaodong Wang
March 10, 2023
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 NOx and CO were also found at rated speed. The biofuels achieved NOx 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% NOx improvements were achieved.
Keywords
Ethanol, Methanol, miller cycle, petrol engine, turbocharger
Suggested Citation
Oxenham L, Wang Y. A Study of the Impact of Methanol, Ethanol and the Miller Cycle on a Gasoline Engine. (2023). LAPSE:2023.20132
Author Affiliations
Oxenham L: Department of Engineering, Durham University, Durham DH1 3LE, UK
Wang Y: Department of Engineering, Durham University, Durham DH1 3LE, UK [ORCID]
Journal Name
Energies
Volume
14
Issue
16
First Page
4847
Year
2021
Publication Date
2021-08-09
Published Version
ISSN
1996-1073
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Original Submission
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PII: en14164847, Publication Type: Journal Article
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LAPSE:2023.20132
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doi:10.3390/en14164847
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Mar 10, 2023
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