Font Size: 

To obtain reliable results from tests performed on the roller dynamometers, it is mandatory to know the rotating parts' inertia for both the stand and powertrain of the tested vehicle. Similarly, the estimation of the power losses appearing in the dynamometer, in the vehicle powertrain, and at the tire-rollers contact, is also required for the experiments of interest, mainly as functions of speed. During tests, the influences of the moment of inertia and drag torques are mixed, making it difficult to separate them from the experimental results.  The paper presents possible ways to assess firstly the inertia of the rotating parts and then the resistances accompanying the rolling of the vehicle wheels at different speeds.