CORRELATIONS OF EXHAUST EMISSIONS FROM A DIESEL-ENGINE WITH DIESEL FUEL PROPERTIES

Mathematical expressions are presented in this paper that correlate th e exhaust emissions from a single-cylinder diesel engine with some of the most important properties of the fuels used. Exhaust emissions mea sured were carbon monoxide, unburned hydrocarbons, nitrogen oxides, an d particulate matter. The experiments were performed using a matrix of 68 fuels, The cetane number of the fuels covered the range 42-58, the density varied between 0.84 and 0.860 g/mL, and the sulfur content va ried from 0.05 to 0.20 wt 40, All predictions were based on specific p oints of the distillation curve, the cetane number, and the density of the fuels. In the case of particulate matter emissions, sulfur conten t was also employed. Very good predictions were obtained for all the e missions considered. The aromatic content was not used as a predictor variable because it was found to have a strong intercorrelation with t he cetane number, density, and the 90% distillation point.