Steering Rack End-Position Detection with Torque-Based Peak Tracking

The patent replaces the mechanical detection method (using maximum/minimum steering angle values directly) with an electrical detection method (monitoring torque sensor signals). By detecting the torque value changes during steering operations and identifying when torque exceeds predetermined thresholds, the system achieves more precise rack end position detection without being affected by mechanism twist or backlash, thereby resolving the contradiction between simplicity and precision.

The patent implements a feedback mechanism where the torque sensor continuously monitors the torque values during steering operations. When the torque value exceeds a predetermined threshold, the system identifies this as the rack end position and provides feedback to the control unit. This feedback-based detection method ensures high precision in rack end position detection, which directly improves the precision of subsequent reference point calculations derived from these end positions.

The patent employs parameter changes by establishing predetermined torque thresholds that define the detection criteria for rack end positions. By monitoring whether the actual torque values exceed these predetermined parameters, the system can detect not only standard installations but also nonstandard rack installations. If the detected end positions fall outside expected ranges or patterns, the system identifies the nonstandard installation condition, thereby achieving both operational simplicity and adaptability to various installation types.