A review on effect of compression ratio on the performance, combustion and emission characteristics of compression ignition engine fuelled with biodiesel

In the present world it is essential to find an alternate fuel source due to the increased industrialization and depletion in natural resources. The method of obtaining biodiesel from various sources and blending them with diesel is adopted in many economically developed and developing countries around the world. Presently lots of researches are being performed to evaluate biodiesel as alternative fuel for diesel engine due to associated problems with use of conventional diesel such as environmental degradation, petroleum depletion etc. However, the combustion behavior of biodiesel is different from diesel. To compensate the effects of utilization of biodiesel and maximize the performance, input parameters of the engine should be adjusted. Biodiesel is receiving increased attention as an alternative, non-toxic, biodegradable and renewable diesel fuel. It is derived from oils and fats by transesterification with alcohols. The main hurdle to the commercialization of biodiesel is the cost of raw materials. Increasing the consumption of fuel in power and automobile sector, increase the pollution of the environment. Smoke and NOx are main pollutants of emission from diesel engine and it is very difficult to control them simultaneously petroleum based fuels is a finite resource that is rapidly depleting. Consequently, petroleum reserves are not sufficient enough to last many years. Biodiesel is one of the alternative fuel made from vegetable oil, friendly for environment and has no effect on health and can reduce the emission compared with diesel fuel.