Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine

This article is aimed at exploring syngas as an alternative fuel for the modern gas engines. It presents the experimental results on the effect of start of injection on combustion, performance and emissions of a direct-injection spark-ignition engine powered by syngas of H2/CO composition. The engin...

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Main Authors:	Hagos, F. Y., Abd Rashid, A. Aziz, Shaharin, A. Sulaiman
Format:	Article
Language:	English
Published:	Sage Publications 2016
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/1/Effect%20of%20Injection%20Timing%20on%20Combustion%2C%20Performance%20and%20Emissions%20of%20Lean-Burn%20Syngas%20%28H2-Co%29%20In%20Spark-Ignition%20Direct-Injection%20Engine.pdf

id	ump-7963
recordtype	eprints
spelling	ump-79632018-04-25T08:03:19Z http://umpir.ump.edu.my/id/eprint/7963/ Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine Hagos, F. Y. Abd Rashid, A. Aziz Shaharin, A. Sulaiman TJ Mechanical engineering and machinery This article is aimed at exploring syngas as an alternative fuel for the modern gas engines. It presents the experimental results on the effect of start of injection on combustion, performance and emissions of a direct-injection spark-ignition engine powered by syngas of H2/CO composition. The engine was operated with wide open throttle at minimum advance to achieve maximum brake torque. Two different start of injections were selected to represent before and after inlet valve closing and the excess air ratio (λ) was set at 2.3. The engine operation at start of injection = 120° before top dead center was found to be best for combustion and performance at speed up to 2100 r/min. At engine speed higher than 2100 r/min, this start of injection does not permit maximum performance due to injection duration limitation. Hence, early injection at start of injection = 180° before top dead center was adopted at higher speed with better combustion and performance. Therefore, best performance of syngas in direct-injection spark-ignition engine could be attained by setting start of injection at 120° before top dead center for lower speeds and at 180° before top dead center for speed greater than 2100 r/min. Even though fast combustion of syngas suggested late injection for better combustion, performance and emissions, its lower calorific value resulted in operational limitations for direct-injection system particularly at higher speeds maintaining air–fuel ratio close to the stoichiometry. Sage Publications 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/7963/1/Effect%20of%20Injection%20Timing%20on%20Combustion%2C%20Performance%20and%20Emissions%20of%20Lean-Burn%20Syngas%20%28H2-Co%29%20In%20Spark-Ignition%20Direct-Injection%20Engine.pdf Hagos, F. Y. and Abd Rashid, A. Aziz and Shaharin, A. Sulaiman (2016) Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine. International Journal of Engine Research, 17 (9). pp. 921-933. ISSN 1468-0874 (print); 2041-3149 (online) http://dx.doi.org/10.1177/1468087415623910 DOI: 10.1016/j.jiec.2014.05.035
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Hagos, F. Y. Abd Rashid, A. Aziz Shaharin, A. Sulaiman Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
description	This article is aimed at exploring syngas as an alternative fuel for the modern gas engines. It presents the experimental results on the effect of start of injection on combustion, performance and emissions of a direct-injection spark-ignition engine powered by syngas of H2/CO composition. The engine was operated with wide open throttle at minimum advance to achieve maximum brake torque. Two different start of injections were selected to represent before and after inlet valve closing and the excess air ratio (λ) was set at 2.3. The engine operation at start of injection = 120° before top dead center was found to be best for combustion and performance at speed up to 2100 r/min. At engine speed higher than 2100 r/min, this start of injection does not permit maximum performance due to injection duration limitation. Hence, early injection at start of injection = 180° before top dead center was adopted at higher speed with better combustion and performance. Therefore, best performance of syngas in direct-injection spark-ignition engine could be attained by setting start of injection at 120° before top dead center for lower speeds and at 180° before top dead center for speed greater than 2100 r/min. Even though fast combustion of syngas suggested late injection for better combustion, performance and emissions, its lower calorific value resulted in operational limitations for direct-injection system particularly at higher speeds maintaining air–fuel ratio close to the stoichiometry.
format	Article
author	Hagos, F. Y. Abd Rashid, A. Aziz Shaharin, A. Sulaiman
author_facet	Hagos, F. Y. Abd Rashid, A. Aziz Shaharin, A. Sulaiman
author_sort	Hagos, F. Y.
title	Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
title_short	Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
title_full	Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
title_fullStr	Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
title_full_unstemmed	Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine
title_sort	effect of injection timing on combustion, performance and emissions of lean-burn syngas (h2/co) in spark-ignition direct-injection engine
publisher	Sage Publications
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/ http://umpir.ump.edu.my/id/eprint/7963/1/Effect%20of%20Injection%20Timing%20on%20Combustion%2C%20Performance%20and%20Emissions%20of%20Lean-Burn%20Syngas%20%28H2-Co%29%20In%20Spark-Ignition%20Direct-Injection%20Engine.pdf
first_indexed	2023-09-18T22:05:10Z
last_indexed	2023-09-18T22:05:10Z
_version_	1777414659129737216

Effect of Injection Timing on Combustion, Performance and Emissions of Lean-burn Syngas (H2/CO) in Spark-Ignition Direct-Injection Engine

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