Steering Assistance Control for Road Cant Compensation
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Solution Overview
Problem
The existing steering assistance control systems for vehicles often result in a left-right difference in turning performance due to manufacturing variations and wear, leading to discomfort and reduced security for occupants as the same steering-wheel angle produces different turning experiences on left and right turns.
Innovation Solution
A steering assistance control apparatus that includes a detection unit to recognize the road surface cant and a correction unit to adjust the steering target steering-wheel angle based on steering characteristic values for left and right steering, calculated from traveling speed and road surface cant data, thereby minimizing the left-right difference in turning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same steering-wheel angle is used for both left and right steering, then the steering control system is simple to operate, but the turning performance differs between left and right directions causing occupant discomfort
Solution Approach 1:
The patent applies local quality by implementing different steering characteristic values for left and right steering directions. The correction unit selectively applies appropriate steering characteristic values based on the steering direction, allowing each direction to have optimized turning performance while maintaining a unified steering control interface for the driver.
Solution Approach 2:
The patent changes the steering characteristic parameter based on steering direction. The correction unit dynamically selects between different steering characteristic values (first value for left steering, second value for right steering) to compensate for manufacturing variations and wear, ensuring consistent turning performance without requiring different steering mechanisms.
2Reliability
If steering characteristic values are corrected based on road surface cant detection, then the turning performance consistency between left and right steering is improved, but the device complexity increases due to additional detection and correction units
Solution Approach 1:
The correction unit performs multiple functions: it detects steering direction, selects appropriate steering characteristic values, and applies corrections to the steering target steering-wheel angle. This multi-functional approach consolidates what could be separate complex subsystems into a single integrated unit, reducing overall system complexity while achieving consistent turning performance.
Solution Approach 2:
The patent implements feedback by using the detected road surface cant information to dynamically adjust the steering characteristic values. The correction unit continuously monitors steering operations and applies real-time corrections based on the detected cant, creating a closed-loop control system that automatically compensates for road conditions without requiring manual intervention.
Data Source
AI summary
A steering assistance control apparatus to be applied to a vehicle includes a detection unit and a correction unit. The detection unit is configured to detect a road surface cant of a road on which the vehicle is traveling. The correction unit is configured to correct a steering target steering-wheel angle in a steering control system, on the basis of a steering characteristic value for each of left steering and right steering and the road surface cant detected by the detection unit. The steering characteristic value indicates a steering characteristic for each combination of a traveling speed and the road surface cant.