Performance of Combustion and Emissions Characteristics of Ethanol Dual Injection Spark Ignition Engine

Al-Muhsen, NFO; Hong, G; Ismail, FB

Performance of Combustion and Emissions Characteristics of Ethanol Dual Injection Spark Ignition Engine

Al-Muhsen, NFO Hong, G

Ismail, FB

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Publisher:: Universiti Malaysia Pahang Publishing
Publication Type:: Journal Article
Citation:: International Journal of Automotive and Mechanical Engineering, 2021, 18, (3), pp. 9082-9093
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Al-Muhsen, NFO
dc.contributor.author	Hong, G https://orcid.org/0000-0002-1905-1161
dc.contributor.author	Ismail, FB
dc.date.accessioned	2022-05-20T07:25:40Z
dc.date.available	2022-05-20T07:25:40Z
dc.date.issued	2021-01-01
dc.identifier.citation	International Journal of Automotive and Mechanical Engineering, 2021, 18, (3), pp. 9082-9093
dc.identifier.issn	2229-8649
dc.identifier.issn	2180-1606
dc.identifier.uri	http://hdl.handle.net/10453/157564
dc.description.abstract	Ethanol dual injection (DualEI) is a new technology to maximise the benefits of ethanol fuel to the spark-ignition engine. In this study, the combustion and emissions characteristics in a DualEI spark-ignition engine with a variation of the direct injection (DI) ratio and engine speed were experimentally investigated. The volume ratio of DI was varied from 0% (DI0%) to 100% (DI100%), and two engine speeds of 3500 and 4000 RPM were tested. The spark timing for maximum brake torque (MBT) was first determined, and then the results of the effect of DI ratio on the engine performance at the MBT conditions were discussed and analysed. The results showed that the MBT timing for the DI and spark timings were 330 and 30 CAD bTDC, respectively. At the MBT timing, the indicated mean effective pressure slightly increased from 0.47 to 0.50 MPa when the DI ratio increased from DI0% to DI100%. However, the maximum combustion pressure significantly decreased by 8.32%, and volumetric efficiency increased by 4.04%. This was attributed to the reduced combustion temperature due to the cooling effect of ethanol fuel enhanced by the DI strategy. The indicated specific carbon monoxide and hydrocarbons significantly increased due to poor mixture quality caused by fuel impingement associated with the overcooling effect. However, the indicated specific nitric oxides significantly decreased due to the temperature reduction inside the combustion chamber. Results showed the potential of DualEI to increase the compression ratio and consequently increase the engine thermal efficiency without the risk of engine knock
dc.language	en
dc.publisher	Universiti Malaysia Pahang Publishing
dc.relation.ispartof	International Journal of Automotive and Mechanical Engineering
dc.relation.isbasedon	10.15282/IJAME.18.3.2021.20.0697
dc.rights	This is an open access article under the CC BY license
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0902 Automotive Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.title	Performance of Combustion and Emissions Characteristics of Ethanol Dual Injection Spark Ignition Engine
dc.type	Journal Article
utslib.citation.volume	18
utslib.for	0902 Automotive Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	recently_added	*
dc.date.updated	2022-05-20T07:25:38Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	18
utslib.citation.issue	3

Abstract:

Ethanol dual injection (DualEI) is a new technology to maximise the benefits of ethanol fuel to the spark-ignition engine. In this study, the combustion and emissions characteristics in a DualEI spark-ignition engine with a variation of the direct injection (DI) ratio and engine speed were experimentally investigated. The volume ratio of DI was varied from 0% (DI0%) to 100% (DI100%), and two engine speeds of 3500 and 4000 RPM were tested. The spark timing for maximum brake torque (MBT) was first determined, and then the results of the effect of DI ratio on the engine performance at the MBT conditions were discussed and analysed. The results showed that the MBT timing for the DI and spark timings were 330 and 30 CAD bTDC, respectively. At the MBT timing, the indicated mean effective pressure slightly increased from 0.47 to 0.50 MPa when the DI ratio increased from DI0% to DI100%. However, the maximum combustion pressure significantly decreased by 8.32%, and volumetric efficiency increased by 4.04%. This was attributed to the reduced combustion temperature due to the cooling effect of ethanol fuel enhanced by the DI strategy. The indicated specific carbon monoxide and hydrocarbons significantly increased due to poor mixture quality caused by fuel impingement associated with the overcooling effect. However, the indicated specific nitric oxides significantly decreased due to the temperature reduction inside the combustion chamber. Results showed the potential of DualEI to increase the compression ratio and consequently increase the engine thermal efficiency without the risk of engine knock

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http://hdl.handle.net/10453/157564