In this work we present analytical method of exhaust emissions calculation. The main objective of this research was to develop equations which may enable prediction of actual exhaust emissions of a vehicle powered by gasoline engine in condition of European Urban Driving Cycle ECE-15 (UDC-ECE-15). The suggested functions investigate the influence of different parameters of vehicle on exhaust emissions in conditions of UDC-ECE-15 and identify opportunities to reduce them. For the calculations we developed novel equations calculating fuel consumption. For the calculations of emissions, in addition to the equations, we have used emission rates from various laboratories sources. For each mode of UDC-ECE-15 we have developed a separate set of equations and recalculated rates of emission for each mode. This approach allows one to assess more accurately the effect of each design parameter of a vehicle on the level of pollution from exhaust gases, which is very important for vehicle designing. Calculations have shown that fuel consumption does not have a direct impact on the amount of exhaust gases and it affects in conjunction with driving mode. The results showed that HC and CO emission factors are almost two and four times greater than those of suburban driving cycles (SUDC). All these differences are mainly attributed to the greater proportion of idling periods and higher vehicle speed fluctuations in the UDC-ECE-15. Moreover, it is shown that the effect of various design parameters on vehicle fuel consumption and exhaust emissions can be studied utilizing the proposed model.
