ABSTRACT
Biodiesel is derived from vegetable oil, animal fat, and waste frying oil. The properties of these fuels are similar to those of petroleum diesel fuel. Biodiesel is a promising substitute fuel for CI engines as it is free from sulfur, is non-corrosive, and produces lower exhaust emission compared to conventional diesel. However, the obstacles to biodiesel use in diesel engines are poor low-temperature properties, higher viscosity and density, and inferior engine characteristics. The use of pure biodiesel in engines causes issues like injector choking, piston ring sticking, and poor spray characteristics. Also, it produces greater NO emission and inferior engine characteristics compared to conventional diesel. These must be rectified before the commercialization of biodiesel. Conventional injection systems fueled with biodiesel produced more emissions, thus failing to meet the emissions norms imposed by the government of India. Higher emissions from diesel engines cause environmental pollution, acid rain, global warming, and ozone layer depletion. Researchers have been making efforts from this perspective to improve performance and lessen emission from diesel engines through engine modification or advanced injection strategies like single injection, split injection, and multiple injection strategies, along with a combination of split injection and EGR strategy. Hence, this present investigation studies the effect of advanced injection strategies on diesel engine performance and combustion characteristics of biodiesel and conventional diesel.
