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., Aziz, A.R.A., Sulaiman, S.A.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.25695 /
Published: SAGE Publications Ltd 2016
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994013309&doi=10.1177%2f1468087415623910&partnerID=40&md5=e682580ac57c10b2d5ba40b27389f407
http://eprints.utp.edu.my/25695/
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spelling utp-eprints.256952021-08-27T09:40:46Z Effect of injection timing on combustion, performance and emissions of lean-burn syngas (H2/CO) in spark-ignition direct-injection engine Hagos, F.Y. Aziz, A.R.A. Sulaiman, S.A. 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. © 2015 Institution of Mechanical Engineers. SAGE Publications Ltd 2016 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994013309&doi=10.1177%2f1468087415623910&partnerID=40&md5=e682580ac57c10b2d5ba40b27389f407 Hagos, F.Y. and Aziz, A.R.A. and Sulaiman, S.A. (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. http://eprints.utp.edu.my/25695/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
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. © 2015 Institution of Mechanical Engineers.
format Article
author Hagos, F.Y.
Aziz, A.R.A.
Sulaiman, S.A.
spellingShingle Hagos, F.Y.
Aziz, A.R.A.
Sulaiman, S.A.
Effect of injection timing on combustion, performance and emissions of lean-burn syngas (H2/CO) in spark-ignition direct-injection engine
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 Ltd
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994013309&doi=10.1177%2f1468087415623910&partnerID=40&md5=e682580ac57c10b2d5ba40b27389f407
http://eprints.utp.edu.my/25695/
_version_ 1741197017953075200
score 11.62408

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