Optimization of gasoline compression ignition combustion with ozone addition and two-stage direct-injection at middle loads

Kobashi, Yoshimitsu; Dan Da, Tu Dan; Inagaki, Ryuya; Shibata, Gen; Ogawa, Hideyuki

Optimization of gasoline compression ignition combustion with ozone addition and two-stage direct-injection at middle loads

Kobashi, Yoshimitsu; Dan Da, Tu Dan; Inagaki, Ryuya et al.

International journal of engine research, 2022, 23(2), 232-242

Permalink : https://hdl.handle.net/2115/83734

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アクセス権	open access
URI	https://hdl.handle.net/2115/83734
タイトル	Optimization of gasoline compression ignition combustion with ozone addition and two-stage direct-injection at middle loads
著者	Kobashi, Yoshimitsu ; Dan Da, Tu Dan ; Inagaki, Ryuya ; Shibata, Gen ; Ogawa, Hideyuki
e-Rad_Researcher 80469072 著者名 Kobashi, Yoshimitsu
著者名 Dan Da, Tu Dan
著者名 Inagaki, Ryuya
著者名 Shibata, Gen
e-Rad_Researcher 40185509 著者名 Ogawa, Hideyuki
言語	英語
キーワード	Gasoline compression ignition engine
	ozone
	two-stage injection
	thermal efficiency
	exhaust emissions
発行日	2022-02-01
出版者	SAGE Publications
収録物名	International journal of engine research
巻(号)	23(2)
ページ	232-242
抄録	Ozone (O-3) was introduced into the intake air to control the ignition in a gasoline compression ignition (GCI) engine. An early fuel injection at -68 degrees CA ATDC was adopted to mix the fuel with the reactive O-radicals decomposed from the O-3, before the reduction of the O-radicals due to their recombination would take place. The second injection was implemented near top dead center to optimize the profile of the heat release rate. The engine experiments were performed around the indicated mean effective pressure (IMEP) of 0.67 MPa with a primary reference fuel, octane number 90 (PRF90), maintaining the 15% intake oxygen concentration with the EGR. The quantity of the first injection, the second injection timing as well as the ozone concentration were changed as experimental parameters. The results showed that the GCI operation with the ozone addition makes it possible to reduce the maximum pressure rise rate while attaining high thermal efficiency, compared to that without the ozone. Appropriate combinations of the ozone concentration and the first injection quantity achieve low smoke and NOx emissions. Further, the ozone-assisted GCI operation was compared with conventional diesel operation. The results showed that the indicated thermal efficiency of the ozone-assisted GCI combustion is slightly lower than that of the conventional diesel combustion, but that GCI assisted with ozone is highly advantageous to the smoke and NOx emissions.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Kobashi Y, Dan Da TD, Inagaki R, Shibata G, Ogawa H. Optimization of gasoline compression ignition combustion with ozone addition and two-stage direct-injection at middle loads, International journal of engine research 23(2) pp. 232-242. Copyright © [2022] Institution of Mechanical Engineers (IMechE). DOI: 10.1177/1468087420984574.
PISSN	1468-0874
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1177/1468087420984574