Effects of SI Engine Operating Temperature Fuelled with Gasoline Ethanol Blends on Performance and Emissions Characteristics (original) (raw)

Abstract

The atmospheric temperature in different regions of India is varying between 0℃ and 50℃, and because of this huge variation, it is not easy for the engine to operate under these adverse conditions. Therefore, it is very important to investigate the most suitable operating temperature for the engine to obtain the better performance and emission results. The purpose of this investigation is to analyze the problem experimentally to find the better engine performance and emissions levels by using threecylinder four-stroke SI engine computerized test rig used ethanol-gasoline different blends as engine fuel i.e. blended rates 0%, 5%, 10%, 15%, and investigate the engine operating temperature levels at which performance emission level is better with different ethanol gasoline blended fuels. In this analysis, the operational parameters of a three cylinder, four-stroke gasoline engine such as brake power (bp), brake thermal efficiency (η th) and brake specific fuel consumption (bsfc) have been experimentally investigated for different ethanol-gasoline blended fuels also examined emission characteristics such as hydrocarbons (HC) and nitric oxide (NO x). These characteristics (bsfc) are measured with constant engine speed, different engine operating temperatures i.e., coolant temperatures and constant loads of dynamometer. The results obtained on performance and emissions of engine parameters at 3000 rpm with 12 Kg of dynamometer load, i.e., brake thermal efficiency (η th), brake power (bp) and brake specific fuel consumption hydrocarbons (HC) also nitric oxide (NO x) have presented graphically with respect to the coolant temperature of the engine. The present study showed that it is suitable to operate the engine at temperature 65°C-75°C for obtaining better performance and emissions indications for gasoline and ethanol gasoline blends.

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