Studies on digital controlled fumigation in di diesel engine with nanoadditive

Abstract

Diesel engine was invented over a century ago and its usage all over the world has been the increasing in a tremendous manner because of its efficiency with respect to fuel economy, power output and clean exhaust newlineflues. The main challenges associated with the growth of diesel engines newlineinclude depletion of fossil fuels and increasing stringent emission norms. The newlinedepletion of fossil fuels has been studied by many researchers and newlinereplacement by alternative fuels, engine modifications and fuel system newlinemodifications are some of the methods attempted by them. The issues newlineinvolved in alternative fuels include high pressure requirement, leakage from newlineoperation, and decrease in food crops. The emission norms are also attempted newlineby many researchers. Exhaust Gas Recirculation (EGR) and Selective newlineCatalyst Reduction (SCR) are some of the methods adopted to reduce newlineemission in diesel engines. In the latest version of diesel engines, digital newlinecontrols have replaced the traditional analog types for more precision and newlinecontrolled fuel injection rates and timings to enhance combustion and to newlinereduce exhaust gases.Fumigation is the use of highly volatile fuel into the intake air newlineupstream of the diesel engine intake manifold either by spraying, carburetting newlineor injecting. This method has the advantage of providing a portion of the total newlinefuel supply premixed with intake air, thus providing some energy to intake newlineair. It requires minor modifications of the engine like providing low pressure newlinefuel injector, separate fuel tank, lines and controls. A comparatively higher newlinepercentage of fuels can be used as miscibility is avoided in this method newline newline