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

Oxenham, Luke; Wang, Yaodong

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


Authors

Luke Oxenham



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 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 achieve

Citation

Oxenham, L., & Wang, Y. (2021). A Study of the Impact of Methanol, Ethanol and the Miller Cycle on a Gasoline Engine. Energies, 14(16), Article 4847. https://doi.org/10.3390/en14164847

Journal Article Type Article
Acceptance Date Aug 5, 2021
Online Publication Date Aug 9, 2021
Publication Date Aug 2, 2021
Deposit Date Dec 20, 2021
Publicly Available Date Mar 29, 2024
Journal Energies
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 14
Issue 16
Article Number 4847
DOI https://doi.org/10.3390/en14164847

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Published Journal Article (11.4 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited




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