The effect of an additional braking system on the working brakes loading and the average speed of highly mobile wheeled vehicles and its assessment

Introduction. The main property to assess in multi-purpose wheeled vehicles is their mobility, characterized by cross-country pass ability, high-speed and autonomy. At the same time, the main factor of assessment is the high speed (high average speed) which can ensure a high wheeled vehicles mobility. One of the promising ways to increase the speed of highly mobile wheeled vehicles is to increase their braking efficiency due to the use of an additional deceleration system preserving the service brake system operability during intensive driving.

The purpose of the study was to increase the mobility speed of wheeled vehicles by improving the braking properties with the help of an additional braking system.

Methodology and research methods. A set of full-scale mathematical modeling was used to assess the additional braking system effect on the working brakes loading and the average speed of highly mobile wheeled vehicles in the totality of road and soil conditions. The use of the mathematical modeling complex made it possible to study and control the movement of a car by a driver-operator along statistically specified routes in “real time”. The following indicators were used to assess the additional braking system effectiveness: the working brakes temperature; reduction of energy dissipated by the service braking system during the drive; the dependence of the average travel speed on the transmission units effecting its deceleration.

Scientifi c novelty and results. The method presented in this work allowed assessing the effect of the additional braking system on the working brakes load and the average speed of highly mobile wheeled vehicles motion at the design stage in the conditions close to real operation.

Practical significance. The high efficiency of the additional braking system application for highly mobile wheeled vehicles has been proven. The degree of the working brake system loading reduction, as well as the level of the considered machines average speed in the totality of road conditions were determined.

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