Effect of driving resistances on energy demand and exhaust emission in motor vehicles

Among the fundamental factors affecting emissions of internal combustion engines is resistance to motion acting on car. This an important factor be taken into account when testing cars in conditions simulated a chassis dynamometer. The dependence driving function vehicle speed determined basis various methods, most frequently used which so-called alternative method specified procedures for type approval motor vehicles with respect emission pollutants exhaust gases. values adopted accordance differ from actual car road conditions. one reasons why and fuel consumption engine real differs given by manufacturer, including limits standards. paper presents evaluation influence energy demand gases sample passenger SI fuelled petrol LPG.