Ecology, Environment and Conservation Paper

EXPERIMENTAL INVESTIGATIONS ON EXHAUST EMISSIONS OF COPPER COATED ENGINE WITH METHANOL BLENDED GASOLINE

N.V. Srinivasulu, K. Kishor and M.V.S. Murali Krishna

Abstract

Investigations were carried out to evaluate the exhaust emissions of two stroke and four stroke of single cylinder, spark ignition (SI) engine having copper coated engine [CCE, copper-(thickness, 250 ) coated onpiston crown and inner side of cylinder head] provided with catalytic converter with copper as catalyst with methanol blended gasoline (85% gasoline and 15% methanol by volume) and compared withconventional engine (CE) with neat gasoline operation. Exhaust emissions of carbon mono oxide (CO), unburnthydro carbons (UBHC) were varied with different values of brake mean effective pressure (BMEP).Aldehdyes were measured at full load operation of the engine. The engine was provided with catalyticconverter with copper as catalyst. There was provision for injection of air into the catalytic converter. Brakethermal efficiency increased with methanol blended gasoline with both versions of the engine.CCE showedimprovement in the performance when compared with CE with both test fuels. 4-Stroke enginedecreasedexhaust emissions effectively in comparison with 2-stroke engine with both versions of theengine. Catalyticconverter with air injection significantly reduced pollutants with different test fuels on bothconfigurationsof the engine.