Experimental Investigation on Variable Compression Ratio of Single Cylinder Four Stroke SI Engine Working under Ethanol – Gasoline Blend

B. V. Lande, Dr. Suhas Kongre


Ethanol has the potential to improve engine efficiency and
reduce harmful emissions when used as a Fuel in Spark
ignited engine. The greatest advantage of ethanol as a fuel in
SI Engines is its high octane number, high latent heat of
evaporation. The thermal efficiency of an SI engine that is the
ability to convert fuel energy to mechanical energy, mainly
depend on the compression ratio. It is therefore advantage to
increase this as much as possible. High octane number fuels
can be used with high compression ratios, thus yielding higher
energy efficiency. This work investigate to suggest suitable
ethanol gasoline blend and compression ratio for single
cylinder four strokes SI Engine on the basis of performance
and exhaust emissions. A single cylinder four stroke SI
Engine was tested with different blend of ethanol – gasoline
like E5 (5% ethanol +95% gasoline), E10 (10% ethanol +
90% gasoline) E15 (15% ethanol + 85% petrol) and E20
( 20% + 80% gasoline) with Variable compression ratio. The
performance parameter evaluated BSFC, Brake thermal
efficiency and also exhaust emission CO2,Co & HC%. The
result showed that higher compression ratio improved engine
Performance and reduction in exhaust emission.

Full Text:



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