Effect of injection timing on emission analysis of a constant speed diesel engine running on biodiesel fuelled with pure diesel fuel.

Abstract

In the development of alternative, biodegradable, and renewable fuels used for internal combustion (IC) engines to obtain the power. Therefore, in this present study, influence of fuel injection timing on the exhaust emission of a single cylinder, four stroke, and direct injection(DI) diesel engine was considered. It has been experimentally investigated using rubber seed and jatropha seed oil blended diesel fuel from 20%(B20)to 40%(B40) with an increment of 10%. The engine was tested at different loads from no load to full load conditions with diesel fuel at normal injection pressure of 220 bar and fuel injection timing of 24 0CA BTDC. The experimental tests were performed at 210CA BTDC injection timings by changing the thickness of advance shim. The experimental results obtained show that CO and UHC emissions were decreasedfor the proportion of B20,NOx and exhaust gas temperatureincreased with increasing amount of biodiesel concentration in the fuel mixture.