Abstract

There are many changes in the automotive industry which leads to improved to safety and reduce fuel consumption. A new design of vehicles are being modernized, reducing aerodynamic resistances and the weight of vehicle units. However it is forgotten about the same time changing and updating the fuel consumption’s tests. The cars are tested with New European Driving Cycle test which based on directive 91/441/EEC (26 June 1991). It’s been 23 years. NEDC was developed at a time when European vehicles were lighter and less powerful. The test offers a stylized pattern for low speed acceleration (a = 0.89 m / s), speed, ride at idle, but temporary increase is much steeper and more dynamic in practice, in part due to the excess capacity of modern engines.

This paper presents a comparison of fuel combustion Polish users registered on the famous automotive’s forum between factory data vehicles selected. As a result, it is hard for drivers to reach the certified values in practice.

The new version of the driving cycle should be more realistic to the everyday use of additional equipment and gadgets that are installed in modern vehicles.