International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Road experiments were conducted – when accelerating the motorcycle to the limit values of longitudinal geometric stability and the loss of contact of the front wheel with the road or reaching the “wheelie” phenomenon. From the theory of the motorcycle it follows that the critical accelerations depends on the height of the center of mass and its horizontal coordinate. In the presence of a passenger, the center of gravity is moved back and up, which leads to a decrease in the theoretical value of these accelerations. Therefore, the experiments were conducted on a motorcycle equipped with a suitcase and a passenger located on the back seat. The received information is recorded and visualized on a portable computer, and then processed in the Matlab and Excel environment. The results obtained from the experiments and the accumulation of databases can be used to create models for determining the influence of the driver’s behavior, the passenger’s influence, models for determining the behavior of the motorcycle and the comfort of the trip. During the measurements, the change in position of the driver and passenger is not taken into account.

Modal simulations comparing the behaviour of different types of motorcycle suspension in specific conditions are found in the literature. However, there is a lack of sufficient field experiments that can be used both to calibrate the models and to realistically assess the advantages and disadvantages of alternative designs. The aim of this publication is to evaluate the behavior of the authors’ alternative front suspension of a motorcycle in braking mode. To achieve this goal, a series of road tests were conducted on the same motorcycle equipped with a different type of front suspension. Both experiments were conducted with the same equipment using the same methodology. The results were processed in the Matlab environment. The obtained results can be used both to evaluate the designed suspension and to validate simulation models and optimize the suspension according to the same methodology. The results were processed in the Matlab environment. The obtained results can be used to validate simulation models and optimize the suspension