Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine

A two-stroke engine complete with a scavenging system, operating with external pumping mechanism is being developed. The engine comprises of two pair of combustion chambers and a pair of piston pumps that are integrated onto the Scotch-Yoke crank mechanism. The Schnurle type loop scavenging arrangem...

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Main Author:	Ng, Tee Neng
Format:	Thesis
Language:	English
Published:	2006
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/2137/1/NgTeeNengMFKM2006.pdf
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id	my-utm-ep.2137
record_format	uketd_dc
spelling	my-utm-ep.21372018-06-13T07:05:39Z Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine 2006-04 Ng, Tee Neng TJ Mechanical engineering and machinery A two-stroke engine complete with a scavenging system, operating with external pumping mechanism is being developed. The engine comprises of two pair of combustion chambers and a pair of piston pumps that are integrated onto the Scotch-Yoke crank mechanism. The Schnurle type loop scavenging arrangement was selected for the scavenging arrangement for the engine port design. The pump was to be driven by the engineâ€™s pistons linkages. The significant advantages of this opposed piston-driven pump concept is the double action of air pumping at every 180Â° interval of crankshaft revolution. In addition, extensive work using Computational Fluid Dynamic code simulation tools were applied throughout the project to ensure that the scavenging port geometry is optimized. Also developed was a scavenging test rig specifically to verify the simulation results. The unfired tracer gas sampling method was developed for the scavenging measurement purposes. The experimental testing was carried out successfully with the use of instrumentations such as Dewetron High Speed Data Acquisition and crank encoder. Both the simulation results and experimental results showed good scavenging characteristic, where the scavenging efficiency is closed to the perfect mixing scavenging model. The development of the scavenging system will allow for the reduction of the pollutant emission, and the overcome short-circuiting problem of the two-stroke engine 2006-04 Thesis http://eprints.utm.my/id/eprint/2137/ http://eprints.utm.my/id/eprint/2137/1/NgTeeNengMFKM2006.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ng, Tee Neng Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
description	A two-stroke engine complete with a scavenging system, operating with external pumping mechanism is being developed. The engine comprises of two pair of combustion chambers and a pair of piston pumps that are integrated onto the Scotch-Yoke crank mechanism. The Schnurle type loop scavenging arrangement was selected for the scavenging arrangement for the engine port design. The pump was to be driven by the engineâ€™s pistons linkages. The significant advantages of this opposed piston-driven pump concept is the double action of air pumping at every 180Â° interval of crankshaft revolution. In addition, extensive work using Computational Fluid Dynamic code simulation tools were applied throughout the project to ensure that the scavenging port geometry is optimized. Also developed was a scavenging test rig specifically to verify the simulation results. The unfired tracer gas sampling method was developed for the scavenging measurement purposes. The experimental testing was carried out successfully with the use of instrumentations such as Dewetron High Speed Data Acquisition and crank encoder. Both the simulation results and experimental results showed good scavenging characteristic, where the scavenging efficiency is closed to the perfect mixing scavenging model. The development of the scavenging system will allow for the reduction of the pollutant emission, and the overcome short-circuiting problem of the two-stroke engine
format	Thesis
qualification_level	Master's degree
author	Ng, Tee Neng
author_facet	Ng, Tee Neng
author_sort	Ng, Tee Neng
title	Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
title_short	Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
title_full	Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
title_fullStr	Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
title_full_unstemmed	Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
title_sort	design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2006
url	http://eprints.utm.my/id/eprint/2137/1/NgTeeNengMFKM2006.pdf
_version_	1747814400438304768

Design and optimization of the scavenging system of a multi-cylinder two-stroke scotch-yoke engine

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