With the development of alternative drive concepts for vehicles, the PEM-fuel cell constitutes a highly promising solution due to its high efficiency and local zero emissions. In order to analyze the behavior of the components, the efficiency and thus energy losses along the drive train, a model capable of simulating the longitudinal dynamics of the vehicle was build in the simulation software GT-SUITE. In this way, after outlining the underlying model, the fuel consumption of the vehicle and the power consumption of the vehicle components, e.g. of the aircompressor, could be determined by means of driving cycle-analysis. Furthermore the influence of different parameters regarding the energy losses, such as the fuel cell temperature and system pressure, was demonstrated. Likewise the dimension of the battery and fuel cell concerning the driving cycles was elucidated. Three different operating strategies of the fuel cell were compared for the purpose of lowering the fuel consumption, whereby none of the two alternative strategies showed considerable reduction in contrast to the reference strategy. However, different energy losses and behaviors of the vehicle components were exhibited, so that these insights could be used for advanced strategies.