Engine downsizing simulation based on low rpm variable valve timing system

Downsizing an engine has proven to be one of an effective way to reduce emissions and fuel consumption. Theoretically, when an engine is running at high speed, maximum overlapping between the intake and exhaust valve is needed for a lean „breathing‟ of the engine. But when an engine is running at li...

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Main Author:	Sabaruddin, Ainul Aniyah
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Automobiles Automobiles - Fuel consumption
Online Access:	http://psasir.upm.edu.my/id/eprint/70522/1/FK%202016%2098%20IR.pdf
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id	my-upm-ir.70522
record_format	uketd_dc
spelling	my-upm-ir.705222019-08-21T06:36:10Z Engine downsizing simulation based on low rpm variable valve timing system 2015-12 Sabaruddin, Ainul Aniyah Downsizing an engine has proven to be one of an effective way to reduce emissions and fuel consumption. Theoretically, when an engine is running at high speed, maximum overlapping between the intake and exhaust valve is needed for a lean „breathing‟ of the engine. But when an engine is running at lighter speed and load, these maximum overlapping techniques may be useful to be use to lessen the engine‟s fuel consumptions and emissions. To optimize these „breathing‟ of the engine, it requires a different set of valve timing at different speed. This is due to the fact that as the speed increases, the duration of intake valve to have more fresh air decreases and combusted gas may not exit the chamber in time. Therefore, varying the intake timing of an engine could help produce higher power and, if applied to smaller and lighter engine, it could result in a lower fuel consumption as well. In this particular research that has been conducted through simulations and complemented by experimental works, it has been realized that downsizing an engine together with the implementation of variable valve timing is able to generate similar power with an increase in volumetric efficiency, while slightly lowering fuel consumption. As reported by many researchers, the variable valve timing method is indeed proven for improved fuel economy, lower emissions and higher torque under any operating condition Automobiles Automobiles - Fuel consumption 2015-12 Thesis http://psasir.upm.edu.my/id/eprint/70522/ http://psasir.upm.edu.my/id/eprint/70522/1/FK%202016%2098%20IR.pdf text en public masters Universiti Putra Malaysia Automobiles Automobiles - Fuel consumption
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Automobiles Automobiles - Fuel consumption
spellingShingle	Automobiles Automobiles - Fuel consumption Sabaruddin, Ainul Aniyah Engine downsizing simulation based on low rpm variable valve timing system
description	Downsizing an engine has proven to be one of an effective way to reduce emissions and fuel consumption. Theoretically, when an engine is running at high speed, maximum overlapping between the intake and exhaust valve is needed for a lean „breathing‟ of the engine. But when an engine is running at lighter speed and load, these maximum overlapping techniques may be useful to be use to lessen the engine‟s fuel consumptions and emissions. To optimize these „breathing‟ of the engine, it requires a different set of valve timing at different speed. This is due to the fact that as the speed increases, the duration of intake valve to have more fresh air decreases and combusted gas may not exit the chamber in time. Therefore, varying the intake timing of an engine could help produce higher power and, if applied to smaller and lighter engine, it could result in a lower fuel consumption as well. In this particular research that has been conducted through simulations and complemented by experimental works, it has been realized that downsizing an engine together with the implementation of variable valve timing is able to generate similar power with an increase in volumetric efficiency, while slightly lowering fuel consumption. As reported by many researchers, the variable valve timing method is indeed proven for improved fuel economy, lower emissions and higher torque under any operating condition
format	Thesis
qualification_level	Master's degree
author	Sabaruddin, Ainul Aniyah
author_facet	Sabaruddin, Ainul Aniyah
author_sort	Sabaruddin, Ainul Aniyah
title	Engine downsizing simulation based on low rpm variable valve timing system
title_short	Engine downsizing simulation based on low rpm variable valve timing system
title_full	Engine downsizing simulation based on low rpm variable valve timing system
title_fullStr	Engine downsizing simulation based on low rpm variable valve timing system
title_full_unstemmed	Engine downsizing simulation based on low rpm variable valve timing system
title_sort	engine downsizing simulation based on low rpm variable valve timing system
granting_institution	Universiti Putra Malaysia
publishDate	2015
url	http://psasir.upm.edu.my/id/eprint/70522/1/FK%202016%2098%20IR.pdf
_version_	1747812858232569856

Engine downsizing simulation based on low rpm variable valve timing system

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