→Braking in corners is differentiated into low to medium deceleration and high deceleration.
→At low to medium deceleration, the vehicle tends to veer into the curve.
→For high deceleration, the effects of the longitudinal forces on the reduction of the transferrable side forces have to be taken into consideration along with the brake force distribution between the axles.
→Considering the brake force distribution, two possibilities exist. Firstly if the rear axle is overbraked, it moves beyond the friction limit resulting in the rear of the vehicle breaking away (oversteer). If on the other hand, the front axle is overbraked, steering control is lost, but the vehicle remains in control.
As assessement criteria, the values of the motion parameters 1 s after the start of the braking process (driver's response time) for steady state cornering with fixed steering wheel is considered as shown in the figure.
The initial radius, initial lateral acceleration and longitudinal deceleration are parameters which are varied. If these values lie above the reference line with respect to deceleration for exact holding of the initial curve radius, it points to the vehicle drifting into the curve during braking. The limit of maneuverability is characterized by the fact that the lateral acceleration at the beginning of braking drops to zero. The yaw rate in this case drops below the reference line, since the vehicle drifts with its front axle towards the outer edge of the curve.