Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine

The use of lean nitrogen oxide traps is an attractive solution for reducing the tailpipe emissions of nitrogen oxides in vehicles with diesel engines. During the operation, nitrogen oxides are stored on the surfaces of lean nitrogen oxide traps, and regeneration of lean nitrogen oxide traps is requi...

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Main Authors:	Koochak, Mostafa, Gharehghani, Ayatallah, Shahbakhti, Mahdi
Format:	Article
Published:	SAGE Publications 2013
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/5844/ http://umpir.ump.edu.my/id/eprint/5844/ http://umpir.ump.edu.my/id/eprint/5844/

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recordtype	eprints
spelling	ump-58442015-06-30T02:54:02Z http://umpir.ump.edu.my/id/eprint/5844/ Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine Koochak, Mostafa Gharehghani, Ayatallah Shahbakhti, Mahdi TJ Mechanical engineering and machinery The use of lean nitrogen oxide traps is an attractive solution for reducing the tailpipe emissions of nitrogen oxides in vehicles with diesel engines. During the operation, nitrogen oxides are stored on the surfaces of lean nitrogen oxide traps, and regeneration of lean nitrogen oxide traps is required for proper operation. In this paper, two in-cylinder combustion strategies for regeneration of lean nitrogen oxide traps were assessed for a high-speed direct-injection diesel engine. In particular, a delayed and extended main strategy and a premixed compression ignition strategy were studied through experiments and simulations. The experimental data were collected from a 1.5 l diesel engine to analyze its combustion, exhaust temperature, fuel consumption, and emission characteristics resulting from either the delayed and extended main strategy or the premixed compression ignition strategy. The results indicated that the premixed compression ignition strategy offered a better fuel economy and lower soot and nitrogen oxide emissions, while the delayed and extended main strategy offered a hotter exhaust temperature and higher production rates of reductant species. In addition, a one-dimensional numerical lean nitrogen oxide trap model was designed and validated to study the efficiency of the surface adsorbents on lean nitrogen oxide traps for each of these two strategies in terms of a reduction in the nitrogen oxide emissions. The simulation results revealed that both strategies can reach a lean nitrogen oxide trap efficiency rate of 100% when the exhaust gas recirculation rate was equal to 30% but that the lean nitrogen oxide trap efficiency rate drops when lower exhaust gas recirculation rates were applied. Overall, the results indicated that the premixed compression ignition strategy performed better than the delayed and extended main strategy in terms of the fuel economy and lower tailpipe emissions. SAGE Publications 2013 Article PeerReviewed Koochak, Mostafa and Gharehghani, Ayatallah and Shahbakhti, Mahdi (2013) Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 227 (12 ). pp. 1661-1673. ISSN 2041-2991 http://dx.doi.org/10.1177/0954407013504751 DOI: 10.1177/0954407013504751
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Koochak, Mostafa Gharehghani, Ayatallah Shahbakhti, Mahdi Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
description	The use of lean nitrogen oxide traps is an attractive solution for reducing the tailpipe emissions of nitrogen oxides in vehicles with diesel engines. During the operation, nitrogen oxides are stored on the surfaces of lean nitrogen oxide traps, and regeneration of lean nitrogen oxide traps is required for proper operation. In this paper, two in-cylinder combustion strategies for regeneration of lean nitrogen oxide traps were assessed for a high-speed direct-injection diesel engine. In particular, a delayed and extended main strategy and a premixed compression ignition strategy were studied through experiments and simulations. The experimental data were collected from a 1.5 l diesel engine to analyze its combustion, exhaust temperature, fuel consumption, and emission characteristics resulting from either the delayed and extended main strategy or the premixed compression ignition strategy. The results indicated that the premixed compression ignition strategy offered a better fuel economy and lower soot and nitrogen oxide emissions, while the delayed and extended main strategy offered a hotter exhaust temperature and higher production rates of reductant species. In addition, a one-dimensional numerical lean nitrogen oxide trap model was designed and validated to study the efficiency of the surface adsorbents on lean nitrogen oxide traps for each of these two strategies in terms of a reduction in the nitrogen oxide emissions. The simulation results revealed that both strategies can reach a lean nitrogen oxide trap efficiency rate of 100% when the exhaust gas recirculation rate was equal to 30% but that the lean nitrogen oxide trap efficiency rate drops when lower exhaust gas recirculation rates were applied. Overall, the results indicated that the premixed compression ignition strategy performed better than the delayed and extended main strategy in terms of the fuel economy and lower tailpipe emissions.
format	Article
author	Koochak, Mostafa Gharehghani, Ayatallah Shahbakhti, Mahdi
author_facet	Koochak, Mostafa Gharehghani, Ayatallah Shahbakhti, Mahdi
author_sort	Koochak, Mostafa
title	Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
title_short	Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
title_full	Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
title_fullStr	Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
title_full_unstemmed	Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine
title_sort	experimental and simulation study of in-cylinder strategies for regeneration of lean nitrogen oxide traps in a high-speed direct-injection diesel engine
publisher	SAGE Publications
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/5844/ http://umpir.ump.edu.my/id/eprint/5844/ http://umpir.ump.edu.my/id/eprint/5844/
first_indexed	2023-09-18T22:01:16Z
last_indexed	2023-09-18T22:01:16Z
_version_	1777414413903462400

Experimental and Simulation Study of In-Cylinder Strategies For Regeneration of Lean Nitrogen Oxide Traps In A High-Speed Direct-Injection Diesel Engine

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