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INFLUENCE OF ISOBUTANOL BLEND IN SPARK IGNITION ENGINE PERFORMANCE AND EMISSIONS OPERATED WITH GASOLINE AND ETHANOL

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Author(s): D.Balaji, | Dr.P.Govindarajan, | J.Venkatesan

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 2;
Issue: 7;
Start page: 2859;
Date: 2010;
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Keywords: INFLUENCE OF ISOBUTANOL BLEND IN SPARK IGNITION ENGINE

ABSTRACT
This paper investigates the effect of using unleaded gasoline and additives blends on spark ignition engine (SI engine) performance and exhaust emission. A four stroke, single cylinder SI engine was used for conducting this study. Performance tests were conducted for fuel consumption, volumetric efficiency, brake thermal efficiency, brake power, engine torque and brake specific fuel consumption, while exhaust emissions were analysed for carbon monoxide (CO), Hydrocarbon (HC), and Oxides of nitrogen (NOx) using unleaded gasoline and additives blends with different percentages of fuel at varying engine torque condition and constant engine speed. The result showed that blending unleaded gasoline with additives increases the brake power,volumetric and brake thermal efficiencies and fuel consumption. The CO and HC emissions concentrations in the engine exhaust decreases while the NOx concentration increases. The addition of 5% isobutanol and 10% ethanol to gasoline gave the best results for all measured parameters at all engine torque values. Keywords: Fuel additive; Gasoline-Additives blend; Exhaust emissions .
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