Vehicle Steering Control with Snow Chain Detection
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Solution Overview
Problem
Existing vehicle steering systems, such as AFS and RWS, face interference issues when snow chains are mounted, leading to instability and interference with vehicle components due to reduced clearance between wheels and peripherals.
Innovation Solution
A cooperative control method between AFS and RWS, where a controller determines snow chain mounting via wheel speed sensors, selectively controlling operations to prevent interference by adjusting steering angles and disabling systems when necessary, ensuring stable vehicle operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If RWS operates when snow chain is mounted on rear wheel, then turning stability is improved, but interference between snow chain and peripheral portions occurs
Solution Approach 1:
The controller detects snow chain mounting status in advance through vibration sensors and preemptively disables RWS operation when snow chains are detected on rear wheels, preventing interference before it occurs. This preliminary detection and prevention mechanism resolves the contradiction by avoiding the harmful interference while maintaining turning stability through alternative control modes.
2Ease of operation
If AFS operates when snow chain is mounted on front wheel, then steering convenience is improved, but interference between snow chain and peripheral portions occurs
Solution Approach 1:
The controller detects snow chain mounting status on front wheels through vibration sensors and preemptively disables AFS operation when snow chains are detected, preventing interference before it occurs. This preliminary detection and prevention mechanism resolves the contradiction by avoiding harmful interference while maintaining steering convenience through normal steering control.
3Reliability
If snow chain mounting detection is added to steering control system, then interference prevention is improved, but device complexity increases
Solution Approach 1:
The system uses the vehicle's existing wheel speed sensors to detect snow chain mounting status by analyzing vibration patterns, eliminating the need for separate detection sensors. The controller autonomously determines snow chain presence based on vibration frequency analysis and automatically adjusts steering control accordingly. This self-service approach using existing hardware resolves the contradiction by achieving reliable interference prevention without adding device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents interference and maintains steering stability by compensating for steering angles, allowing the vehicle to operate as if all systems are active, even when snow chains are mounted, thus enhancing travel stability and convenience.
Implementation Method 1
determining whether a snow chain has been mounted by comparing the number of times of vibrations of a certain peak or more detected by respective wheel speed sensors with respect to a current vehicle speed
Data Source
AI summary
A steering control method and system for a vehicle may determine whether the snow chain has been mounted by comparing the number of times of vibrations of a certain peak or more detected by respective wheel speed sensors with respect to a current vehicle speed with a predetermined value, and selectively controls the operations of an AFS and a RWS according to the position of the wheel on which the snow chain has been mounted, when it is determined that the snow chain has been mounted.