ID | 65162 |
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Author |
Kobashi, Yoshimitsu
Faculty of Natural Science and Technology, Okayama University
Inagaki, Ryuya
Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
Shibata, Gen
Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
Ogawa, Hideyuki
Division of Energy and Environmental Systems, Graduate School of Engineering, Hokkaido University
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Abstract | Here, ozone (O-3) was introduced into the intake air in a natural gas fueled engine ignited by diesel fuel, a natural gas-diesel dual fuel engine, to utilize the reactive O-radicals decomposed from the O-3 for the promotion of the ignition and for improvements in the thermal efficiency and exhaust emissions. The engine experiments were performed over a range of equivalence ratios of the natural gas in a single cylinder engine. The timing of the pilot injection of the diesel fuel was varied from early in the compression stroke to near top dead center to examine the changes in the effects of the O-3 addition on the ignition and combustion with the pilot injection timing while varying the O-3 concentration. The results showed that the combination of the O-3 addition and the early pilot injection is a means to improve the thermal efficiency and unburned emissions with a small amount of O-3. Further, the improvement in the thermal efficiency and the reduction of the unburned hydrocarbons with the O-3 addition are more pronounced for lower equivalence ratios of natural gas, while the O-3 addition has a limited effect on the thermal efficiency and the unburned hydrocarbons for higher equivalence ratios of the natural gas.
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Keywords | Dual fuel engine
ozone
natural gas
diesel fuel
pilot injection
thermal efficiency
exhaust emissions
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Note | This is an Accepted Manuscript of an article published by SAGE Publications.
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Published Date | 2023-3-24
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Publication Title |
International Journal of Engine Research
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Publisher | SAGE Publications
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ISSN | 1468-0874
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Content Type |
Journal Article
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language |
English
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OAI-PMH Set |
岡山大学
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Copyright Holders | © IMechE 2023.
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File Version | author
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DOI | |
Web of Science KeyUT | |
Related Url | isVersionOf https://doi.org/10.1177/14680874231162144
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Citation | Kobashi Y, Inagaki R, Shibata G, Ogawa H. Improvements in thermal efficiency and exhaust emissions with ozone addition in a natural gas-diesel dual fuel engine. International Journal of Engine Research. 2023;0(0). doi:10.1177/14680874231162144
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Funder Name |
Japan Society for the Promotion of Science
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助成番号 | 22K03938
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