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The steering torque provides the driver with useful information about the driving condition of the vehicle. However, the realization of a satisfying characteristic of the steering torque for the customer leads to restrictions in the design of suspension parameters. Increasing requirements for the steered axle regarding costs, weight and package are the consequences. Another result is the conflict of objectives during the suspension design.
The goal is a reduction of the requirements while ensuring the present characteristic of the steering torque at the same time. Therefore, existing restrictions in the design of suspension parameters should be lifted and resulting negative effects be compensated by the electromechanical power steering system. Altogether, the ranges of suspension parameters used in the suspension design can be increased and existing Conflicts of objectives can be resolved.
In the beginning the state of the art regarding axle kinematics and electric power steering are researched. Based on a validated vehicle model the resulting effects of modified suspension parameters on the steering are analyzed and evaluated. Subsequently, a control concept to compensatre negative effects on the steering is developed and validated. In the end the whole concept of modified suspension parameters and steering control is validated. The suitability of the chosen approach to solve the specified problem can be assessed in this way.