Effect of Modifications of Piston Bowl Geometry in Stationary Diesel Engine Fuelled with Biodiesel–A Comprehensive Review

Abstract

The fossil fuels are depleting at an alarming rate and as a result its cost is also increasing rapidly. Effect of fossil fuel emissions in the atmosphere is observed more. In this context, effective alternator with suitable changes in the existing CI engine are required. One such alternator is Biodiesel. As literature reveals that usage of Biodiesel in the existing engine will not give the original performance as diesel. Therefore, it is necessary to study the suitable changes that are to be done in the existing engine. Piston Bowl Geometry (PBG) is the major factor in diesel engine, even slight modifications done in the PBG gives the large changes in the fuel consumption rate, Performance, Emissions and combustion parameters. This present article, reviews the detailed study of various Piston Bowl Geometries such as Re-entrant type, Toroidal type, trapezoidal, shallow depth etc.., in relevance with its design, performance, emissions and combustion characteristics. And it also reviews the suitability of modified PBG with Biodiesel fuelled CI engine as compared to existing Hemispherical PBG diesel engine which can be used in future to overcome the problems encountered in petroleum based fuel engines.

Effect of modifying bowl geometry for IC engine fueled with diesel and Biofuels - Review

“…In the first scenario, the injector has fewer holes and a deep bowl, but in the second situation, the injector has more holes and a skin-deep bowl. The following are a few of the most frequent geometries [84]: Figure 1 shows the geometry of the omega shape cylinder (OCC) that is found to be more practical for attaining solid squeeze in a short amount of time [87]. At medium to high engine speeds, the OCC's results were shown to be superior to those of a hemispherical combustion cylinder (HCC) or a shallow-profundity combustion cylinder (SCC).…”