Performance and Emissions of Internal Combustion Engine Fuelled With CNG - A Review

Abstract – The development of alternative fuels such as natural gases has become very essential because of the continuously decrease in the petroleum reserves and also their contribution for pollutants. In this paper, a survey of research papers on the utilization of Compressed Natural Gas in the Internal Combustion engines along with its effects on the performance and emissions is done. It is revealed that the performance characteristics except thermal efficiency and exhaust temperature, various other performance parameters like brake mean effective pressure, power, torque and brake specific fuel consumption are decreased for CNG fuelled engine while the emission characteristics of unburnt hydrocarbon, Carbon monoxide and Carbon-di-oxide except nitrogen oxides are better for CNG compared to petrol and diesel engines. The improvement in performance is observed with the addition of hydrogen.