AUTOMOBILE FUEL CONSUMPTION CHANGES AS AFFECT OF LOAD

Load is one of the fuel consumption affecting factors and is hard to measure. A new methodology for load impact measurement was carried out for both: on-road and chassis dynamometer experiments. Three driving cycles were introduced: impulse, gradual and pulsing. The gradual driving cycle was chosen as best suitable for further experiments. The experiments were performed using the chassis dynamometer, fuel consumption meter, global positioning system data logger, automobile diagnostic equipment and automobile scales. The experiments were made with Renault Trafic automobile with three different load regimes: near mass full, near mass equipped and near half of difference of the previous two. The fuel consumption is increasing by increasing the load, every 100 kg load increases the fuel consumption by 2.58- 2.95 % varying from the driving cycle in on-road, and 2.57- 2.89 % on chassis dynamometer experiments.