Influence of Longitudinal Dynamic processes on Lateral Dynamics
The primarily longitudinal dynamic processes
- acceleration
- load changes (releasing the accelerator, declutching)
- braking
usually also lead to lateral dynamic vehicle responses during cornering, which the driver has to compensate by a steering correction.
On roads with sufficient traction, this vehicle response is primarily determined by the dynamic shift of axle-load between front and rear axles, which takes place during acceleration or deceleration, due to a pair of forces consisting of the circumferential forces acting at the wheels and the inertia force acting in the center of gravity of the vehicle and the associated changes in the lateral tire force.
On slippery roads or in the case of very high longitudinal tire forces (high brake power), however, a reduction of the transferable lateral tire forces in the presence of simultaneously acting longitudinal tire forces will have a stronger effect.
Especially during braking, even during straight-ahead driving, a lateral-dynamic vehicle response which has to be controlled by the driver arises when a significant difference in the coefficients of friction is encountered between the left and right lanes (μ-split).