Emissions from diesel engines are very harmful for the environment and for human health. An experimental and comparative study having been done with diesel engines, referred to as dual-fuel (Diesel + CNG) engines and also incorporate there EGR system to extremely minimize NOx emission. The use of compressed natural gas (CNG) as a partial supplement for liquid diesel fuel is a very promising solution for reducing pollutant emissions, particularly
nitrogen oxides (NOx) and particulate matters (PM), from conventional diesel engines. In most applications of this technique, natural gas is inducted or injected in the intake manifold to mix uniformly with air, and the homogenous natural gas–air mixture is then introduced to the cylinder as a result of the engine suction. It is seen that because of lower thermal efficiency and higher carbon monoxide (CO) and unburned hydrocarbon (HC) emissions; particularly at part load. The use of exhaust gas recirculation (EGR) is expected to partially resolve these problems and to provide further reduction in NOx emission as well.
Diesel Engine, CNG, Dual fuel mode, EGR, DOE software