Influence of Intake Air Temperature on Performance of Small Gasoline Engine

Abstract

This research study was to investigate the influence of intake air temperature on the performance of a multi-propose small gasoline engine. The single-cylinder 208 cm^3 four-strokes gasoline engine was tested at speed 1,500-4,000 RPM. The engine intake air conditions were prepared in case of 1) warm air that was like the air around the engine at 50-55°C and room humidity 2) low temperature using evaporative cooling pad system (ECP) with the room temperature water and 3) very low temperature by using the ECP system with cool water at 0.5°C. The engine performance was tested on the water break dynamometer to determine torque, speed, fuel consumption and air induction rate. The result shown that reducing air temperature before taking into the engine by ECP system influences on the increasing of density, relative humidity and pressure of the intake air. The lower temperature of intake air provides an engine torque increasing of 3.21% at 2,000 RPM (use room temperature water) and 7.76% at 3,500 RPM (use cool water) and the specific fuel consumption reduces 7.04% at 3,500 RPM. The exhaust temperature and HC-emissions are decreased when compare to the warm air intake to the engine test.

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Author Information
Tawarat Treeamnuk, Suranaree University of Technology, Thailand
Krawee Treeamnuk, Suranaree University of Technology, Thailand
Sakkarin Papakae, Suranaree University of Technology, Thailand

• Category: ACSEE2018

Posted by James Alexander Gordon

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