Electronic Power Assisted Steering Torque Limiting Method

The patent applies dynamics by making the limitation of assisting steering torque conditional rather than static. The system dynamically adjusts whether to limit the torque based on plausibility checks of sensor signals and driving conditions. When signals are plausible, full performance is allowed; when implausible, limitation is applied. This resolves the contradiction by making the system adaptive to actual operating conditions rather than applying a fixed limitation.

The patent changes the parameter of torque limitation from a constant value to a conditional variable. By introducing plausibility criteria based on sensor signal validation and driving condition assessment, the system transforms the torque limitation parameter from a static safety measure to a dynamic control parameter that adjusts between full performance and limited performance modes based on signal validity.

The patent applies preliminary action by performing plausibility checks on sensor signals before the assisting steering torque is applied. The system validates signals in advance based on predefined criteria and driving conditions, preventing erroneous torques from being generated in the first place. This proactive approach allows full performance when signals are valid while preventing unsafe situations before they occur.

The patent implements feedback by continuously monitoring sensor signals and driving conditions to assess their plausibility. The system uses feedback from multiple sensors and system states to determine whether the current operating conditions justify applying full assisting torque or whether limitation should be applied. This closed-loop feedback mechanism enables the system to maintain high performance while automatically preventing unsafe situations.