The article considers conditions for increasing passive safety of vehicles due to the use of temperature calculation in friction pairs of brake units taking into account their active heat dissipation. This temperature calculation allows designers at the design stage of new brake units to determine their optimal configuration, required frictional surface of the friction brakes, taking into account their thermal stability in conditions of increased friction dynamics, which, ultimately, ensures passive safety of transport.

The article discusses the conditions for increasing the passive safety of vehicles due to the use of the results of calculating the temperature regime in frictional friction pairs in the design of brake assemblies, both taking into account their active heat dissipation, and taking into account the contact thermal resistances along the path of the dissipated heat flows. This temperature calculation allows, at the design stage of new brake units, to determine their optimal geometric arrangement, taking into account the increased thermal dynamics of friction of friction pairs during their active heat dissipation. In addition, it becomes possible to recommend the optimal frictional pairs of friction in the brake units, taking into account their thermal stability. The use of the above thermal calculations will ensure an increase in the performance of the brake units, which, ultimately, will provide an increase in the passive safety of vehicles.

The interrelation of thermal modes of brake units of transport vehicles on their reliability and durability depending on operational factors of transport is considered. It is assumed that all the kinetic energy of rotating and translationally moving masses in the brake nodes is converted into thermal energy. In this regard, a criterion is used that characterizes the thermal energy released in the brakes and the operational criterion of transport vehicles. Comparison of these criteria makes it possible to evaluate the performance and durability of brake components, as well as to outline ways of their structural perfection depending on heat dissipation.