Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation

Abstract The combustion of spark ignition engines converted to bi-fuel CNG is unstable and proper air and fuel mixing strategy is a concern. Also, CNG fuel causes the coefficient of variation for indicated mean effective pressure (COVimep) higher than 10 which is into the region of unstable combusti...

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Main Authors:	D., Ramasamy, Z. A., Zainal, K., Kadirgama, Briggs, Horizon Walker-Gitano
Format:	Article
Language:	English
Published:	Elsevier 2016
Subjects:	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics
Online Access:	http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/1/fkm-2016-deva-Effect%20of%20Dissimilar%20Valve%20Lift%20on%20a%20bi.pdf

id	ump-13954
recordtype	eprints
spelling	ump-139542018-01-30T23:41:25Z http://umpir.ump.edu.my/id/eprint/13954/ Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation D., Ramasamy Z. A., Zainal K., Kadirgama Briggs, Horizon Walker-Gitano TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics Abstract The combustion of spark ignition engines converted to bi-fuel CNG is unstable and proper air and fuel mixing strategy is a concern. Also, CNG fuel causes the coefficient of variation for indicated mean effective pressure (COVimep) higher than 10 which is into the region of unstable combustion. In order to create stable combustion more turbulence is required. This paper studies the valve movement with dissimilar valve lift (DVL) to increase swirl in the engine. The intake valve is the last point of airflow entry into an engine and the modification of the movement can contribute to increase turbulence. Three {DVL} setting simulated via computational fluid dynamics (CFD) gave improvement in peak pressure by 4 and a 32.2 improvement in flame propagation speed compared to baseline CNG. Engine testing shows that, the engine {COVimep} improves up to 8.7, while efficiency improves by 5.7 and {BSFC} is reduced by 5.4 respectively with the 1Â mm {DVL} at 4000Â rpm compared to baseline CNG. The rate of heat release (ROHR) also shows early heat release of the fuel. The novelty is better mileage for future {CNG} engine design. Elsevier 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/13954/1/fkm-2016-deva-Effect%20of%20Dissimilar%20Valve%20Lift%20on%20a%20bi.pdf D., Ramasamy and Z. A., Zainal and K., Kadirgama and Briggs, Horizon Walker-Gitano (2016) Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation. Energy, 112. 509 - 519. ISSN 0360-5442 (Print), 1873-6785 (Online) http://dx.doi.org/10.1016/j.energy.2016.06.116 10.1016/j.energy.2016.06.116
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics
spellingShingle	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics D., Ramasamy Z. A., Zainal K., Kadirgama Briggs, Horizon Walker-Gitano Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
description	Abstract The combustion of spark ignition engines converted to bi-fuel CNG is unstable and proper air and fuel mixing strategy is a concern. Also, CNG fuel causes the coefficient of variation for indicated mean effective pressure (COVimep) higher than 10 which is into the region of unstable combustion. In order to create stable combustion more turbulence is required. This paper studies the valve movement with dissimilar valve lift (DVL) to increase swirl in the engine. The intake valve is the last point of airflow entry into an engine and the modification of the movement can contribute to increase turbulence. Three {DVL} setting simulated via computational fluid dynamics (CFD) gave improvement in peak pressure by 4 and a 32.2 improvement in flame propagation speed compared to baseline CNG. Engine testing shows that, the engine {COVimep} improves up to 8.7, while efficiency improves by 5.7 and {BSFC} is reduced by 5.4 respectively with the 1Â mm {DVL} at 4000Â rpm compared to baseline CNG. The rate of heat release (ROHR) also shows early heat release of the fuel. The novelty is better mileage for future {CNG} engine design.
format	Article
author	D., Ramasamy Z. A., Zainal K., Kadirgama Briggs, Horizon Walker-Gitano
author_facet	D., Ramasamy Z. A., Zainal K., Kadirgama Briggs, Horizon Walker-Gitano
author_sort	D., Ramasamy
title	Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
title_short	Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
title_full	Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
title_fullStr	Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
title_full_unstemmed	Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation
title_sort	effect of dissimilar valve lift on a bi-fuel cng engine operation
publisher	Elsevier
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/ http://umpir.ump.edu.my/id/eprint/13954/1/fkm-2016-deva-Effect%20of%20Dissimilar%20Valve%20Lift%20on%20a%20bi.pdf
first_indexed	2023-09-18T22:17:09Z
last_indexed	2023-09-18T22:17:09Z
_version_	1777415413171224576

Effect of Dissimilar Valve Lift on a bi-fuel CNG Engine Operation

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