Basic Components

In conventional steering systems, there is a direct mechanical connection between the steering wheel and the steering gear. That means there is a constant, specific relationship between the angle of the steering wheel and the angle of the wheels. In this version, only one ratio can be used in a vehicle. Selecting the appropriate ratio is a compromise because the different and somewhat contradictory requirements must be satisfied as best as possible. The important requirements can only be fulfilled optimally by a variable ratio. Such a ratio changes the actual steering angle of the wheels depending on the vehicle speed and steering angle. Dynamic steering generally implements two variable ratios with comfortable and sporty characteristics. The variable ratios are implemented by an additional electro-mechanical steering pinion actuator that superimposes the driver's steering movement. In emergencies such an actuator malfunction, the steering functions exactly like conventional steering. The mechanical connection between the steering wheel and the front axle is not disconnected. The advantages of dynamic steering are even more extensive. The system is also activated in conjunction with the ESP and its sensors under poor driving conditions. Through selective variation of the front wheel steering angle, the dynamic steering supports the ESP within dynamic driving limits.