Study on emission reduction techniques by in-cylinder reduction method for compression ignition engines

Abstract

Internal Combustion Engines have been one of the contributors of urban air pollution. The usage of CI engines in the locomotives and other applications are inevitable. Emissions from the diesel engines are a major concern. In this paper, an ephemeral examination of the significant studies involving the engine’s characteristics especially those involved in emissions and performance powered with biodiesel blends, biodiesel blends doped with additives, in-cylinder reduction technique in CI engine are presented. The usage of biodiesel in the CI engine results in improved performance with a slender decrease in the engine power and also decrease in emissions of carbon monoxide, nitrogen oxide and unburnt hydrocarbon. However, emission reduction technologies improve the emission results and doping of fuel with additives results in stabilization of engine power. It is understood from the study that emission could be reduced when the engine is run at conditions like 20% blended fuel, lower weight percentage of biologically derived fuel additive, 20% EGR with 20% blended fuel. In most of the cases, a decrease in engine performance up to 5% are recorded due to increase in specific fuel consumption leading to decrease in thermal efficiency.