Кostenko A. The Forecasting of the course stability factors of the passenger car taking into consideration scattering of tyres rigid features

In dissertation work the research problem is solved, which is connected with forecasting and improvement of the course stability factors of the passenger cars mo-tion by means of the rational tyres location with optimum rigid features. For determination of the course stability factors of the passenger car motion sys-tem of the differential equations is formed, which describes the model of the passen-ger car motion taking into account the track. The system allows to investigate the in-fluence on course stability of each tyre motion, installed to car, and their rigid hetero-geneity. Experimentally the features of the lateral withdrawal of the tyres that were used in designed mathematical model are determined. It is established that parameters of course stability are closely connected with springy characteristic of the tyres, the rigid feature of that has heterogeneity. The tyres position, that has rigid heterogeneity, changes the critical speed. The angular effect available in tyres brings to that upon angle wheel turn 0 = 0 car will move on circular path moreover direction will depend on tyres position, importance of the air pressure in each tyre and sharing the vertical load on tyres. The studies results according to forecasting of the course stability factors of the passenger cars motion are accepted to ДП "ДЕРЖАВТОТРАНСНДІПРОЕКТ" and СТО "Opel" OOO "Gratium Ltd" "Adam Opel AG".