Davlatshoev Rashid Asankhonovich,  Mazhitov B.Zh.

Annotation:

The paper presents a generalized analytical model of realizable longitudinal vehicle deceleration that simultaneously accounts for thermal fading of brake mechanisms, adhesion properties of the road surface, dynamic redistribution of vertical loads, and the operation of electronic ABS/EBD systems. It is shown that the realizable deceleration is determined by the minimum of the braking capability of the system and the tire–road adhesion limit. A numerical simulation for a Mercedes W211 vehicle on a 5° slope, taking brake heating into account, is carried out. The obtained results demonstrate the influence of brake fading on braking efficiency and emphasize the limited ability of electronic safety systems to compensate for the reduction in braking force.

Keywords: realizable deceleration, braking system, brake fade, tire–road adhesion, ABS, EBD, dynamic load redistribution.