Experimental Investigations on Performance Evaluation of Four Stroke Copper Coated SI Engine With Methanol Blended Gasoline With Catalytic Converter-A Review
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 10
Abstract
The performance evaluation of four stroke spark ignition engine with gasoline and alcohol (methanol and ethanol) blended gasoline was reviewed and research gaps were identified. This paper reports performance evaluation of four–stroke, single–cylinder, water cooled, variable compression ratio (3–9), variable speed (2200–3000 rpm) spark ignition engine with brake power of 2.2 kW at a speed of 3000 rpm. The combustion chamber of the engine was coated with copper (Copper Coated Engine, CCE) [copper-(thickness, 300 μ) was coated on piston crown, inner side of liner and cylinder head]. The engine was fuelled with methanol blended gasoline [20% methanol with 80% gasoline with varied spark ignition timing. The engine was provided with catalytic converter with sponge iron as catalyst along with air injection. The performance of CCE with methanol blended gasoline was compared with engine with conventional combustion chamber (CE) with gasoline operation. Performance parameters of brake thermal efficiency, brake specific energy consumption, exhaust gas temperature and volumetric efficiency were determined at different values of brake mean effective pressure of the engine. Exhaust emissions (carbon mono oxide {CO) emissions, un-burnt hydro carbon (UBHC) emissions and nitrogen oxide (NOx) levels) were evaluated at full load operation of the engine. Aldehydes (formaldehyde and acetaldehyde) were measured by wet method of 2,4, dinitrophenyle method at full load operation of the engine. Combustion characteristics were measured at full load operation with Piezo electric pressure transducer, TDC (top dead center) encoder, console, and pressure-crank angle software package. NOx emissions were controlled by employing selective catalytic reduction (SCR) technique with the use of modified zeolite and lanthanum zeolite infused with urea. Methanol blended gasoline operation improved performance, reduced CO, UBHC emissions and NOx levels when compared with gasoline operation with both versions of the combustion chamber. At recommended and ignition timing, CCE with test fuels of gasoline and methanol blended gasoline improved performance and reduced pollution levels, when compared with CE. Catalytic converter with sponge iron as catalyst along with air injection significantly reduced pollutants with test fuels. Combustion characteristics improved with CCE in comparison with CE with both test fuels.
Authors and Affiliations
B. Raja Narender, Dr. P. V. Krishana Murthy, Dr. Md. Yousuf Ali, Dr. M. V. S Murali Krishna
Keywords
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