Effects of Air Intake Pressure to the Engine Performance, Fuel Economy and Exhaust Emissions on a Small Gasoline Engine

Nik Rosli, Abdullah and Nafis Syabil, Shahruddin and R., Mamat and Aman Mohd, Ihsan Mamat and Aminuddin, Zulkifli (2014) Effects of Air Intake Pressure to the Engine Performance, Fuel Economy and Exhaust Emissions on a Small Gasoline Engine. Journal of Mechanical Engineering and Sciences (JMES) , 6. pp. 949-958. ISSN 2289-4659 (print); 2231-8380 (online). (Published)

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Abstract

The study presents the engine performance, fuel economy and exhaust emissions at variations of air intake pressure. In carburetor system, the air intake pressure is influenced by the degree of opening throttle plate and venturi effect which draw the fuel to the combustion chamber. The experimental work is carried out at variations of engine speed and load using a single cylinder four stroke gasoline engine attached with a dynamometer. The measured exhaust emissions compositions are used to determine the mode of combustion. The results show that the standard air intake system resulted in rich combustion which then led to incomplete combustion which is caused by less availability of air for the combustion process. Eliminating the air filter reduces the air flow restriction in the air intake system resulted in better combustion and less unburned components due to higher air availability. Higher air intake pressure is better in increasing the efficiency of combustion within a limited time to improve fuel economy, power output and exhaust emissions. Better combustion also leads to the reduced unburned components such as carbon (C), hydrogen (H2), carbon monoxide (CO) and hydroxide (OH) that resulted in cleaner emissions.

Item Type:	Article
Uncontrolled Keywords:	Air intake pressure; Air filter; Air fuel ratio; Fuel consumption; Exhaust emissions
Subjects:	T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Faculty of Mechanical Engineering
Depositing User:	fawaz
Date Deposited:	06 Feb 2014 06:47
Last Modified:	30 Jan 2018 03:45
URI:	http://umpir.ump.edu.my/id/eprint/4116
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