Investigation on Single Cylinder RCCI Engine Fuelled with Blends of Diesel biodiesel And Ethanol Gasoline

Abstract

newline Conventional diesel engines are prone to generate the oxides nitrogen (NOx) newlineand particulate matter (PM) emission. Simultaneous reduction in NOx and PM newlineemission is challenging task due to their tradeoff relationship. For this, various low newlinetemperature combustion strategies has been adopted by the worldwide researchers. newlineAmongst all, reactivity controlled compression ignition (RCCI) is the most newlinepromising one, due to their effective control on combustion phasing and heat release newlinerate (HRR). In RCCI, low reactivity fuel such as gasoline (i.e. low cetane number) is newlineinjected in early compression stroke by port fuel injection (PFI) and high reactivity newlinefuel such as diesel (i.e. high cetane number) is directly injected single or multiple newlinetimes during the combustion cycle. newlineThis research work mainly focuses on simultaneous reduction in NOx and newlinePM emission without affecting thermal efficiency and without use of modern exhaust newlineafter treatment system. Emission, performance and combustion characteristics of newlinemodified constant speed non road single cylinder RCCI (reactivity controlled newlinecompression ignition) engine were investigated for gasoline diesel and various newlineblends of ethanol gasoline and diesel biodiesel. Obtained results were compared with newlinethe conventional single cylinder diesel engine. This research work involves newlinepreparation of various fuel blends, essential modifications in the existing engine for newlineRCCI operation, critical analysis of variation in key parameters for gasoline diesel newlineand lower blends of ethanol gasoline and diesel biodiesel, modeling and simulations newlineof the combustion, model calibration and validation by using the GT power software. newlineAfter exhaustive experimentation and detailed analysis it has been concluded newlinethat, in comparison with the conventional diesel engine, for 3.6 kW condition, there newlinewas a 92% reduction in the NOx and 72% reduction in smoke opacity observed as an newlineeffect of reduction in combustion chamber temperature for E20-B20 blend. newlineCompared to conventional diesel, there was an 11% ris