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The continuous growth of population and development of industries give rise to massive increase in the global energy demand in recent years. Therefore present work investigated the combustion and emission characteristics of an unmodified four stroke single cylinder variable compression ratio diesel engine utilizing isopropyl alcohol (2-propanol)-diethyl ether blends with diesel. The different fuel samples were prepared using 10% isopropyl, alcohol 5% diethyl ether by volume (IPD15), 15% isopropyl alcohol, 5% diethyl ether by volume (IPD20) and 20% isopropyl alcohol 5% diethyl ether by volume (IPD25) with neat standard diesel. All experiment tests were performed with at variable compression ratio 17 and 18 at different load conditions. The effect of blends and compression ratio on combustion parameters viz. peak cylinder pressure and rate of heat release along with exhaust emissions CO, CO2, HC and NOx, were investigated.

The aim of present work is to investigate the performance and emission characteristics of a four stroke, single cylinder variable compression ratio engine fuelled with blends of diethyl ether, linseed oil methyl ester and neat diesel. In the experiment content of diethyl ether kept constant as 5% by volume for all fuel samples whereas linseed methyl ester biodiesel content was varied as 10%, 15% and 20% by volume. The different fuel samples DLD15, DLD20 and DLD25 with neat standard diesel. Experiment tests were performed with engine speed 1500 rpm and variable compression ratio 16, 17 and 18 at different load conditions. The effect of blends and compression ratio on different performance parameters viz. brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), and exhaust gas temperature along with emissions CO, CO2, HC and NOx, were investigated. Results showed that DLD20 and DLD25 exhibited the prominent engine performance and exhaust emissions compared to diesel fuel.