Steering Angle Control for Vehicle Slip Traction Recovery
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Solution Overview
Problem
Vehicles, especially 2WD and some 4WD models, experience difficulty maintaining traction on low-friction road surfaces such as rainy or snowy roads, leading to potential loss of control.
Innovation Solution
A steering control device and method that determines if a vehicle is slipping, uses the current steering angle as a reference to control the driving shaft, and steers the road wheels left or right within a specific angular range to increase traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle uses conventional steering control on low-friction road surfaces, then the steering wheel position remains stable and easy to control, but the vehicle loses traction and slips
Solution Approach 1:
The system automatically detects vehicle slip conditions and adjusts road wheel steering angles without driver intervention. The slip determination unit monitors vehicle state, and when slipping is detected, the controller autonomously steers the road wheels left or right relative to the current steering angle to increase traction, then returns to the original angle, all without requiring driver action.
Solution Approach 2:
The system changes the steering angle parameter dynamically based on detected slip conditions. When slipping is detected, the controller adjusts the road wheel steering angle by a predetermined angle in left or right directions relative to the current steering angle, creating parameter variation that increases traction on low-friction surfaces.
2Reliability
If the road wheels are steered left or right to increase traction, then vehicle control on slippery roads improves, but the steering system complexity increases
Solution Approach 1:
The existing steering system components (steering wheel, driving shaft, road wheels, controller) are made to serve multiple functions. The same steering mechanism that normally follows driver input is also capable of autonomous slip correction by adjusting road wheel angles relative to the current steering angle, eliminating the need for separate correction mechanisms.
Solution Approach 2:
The system implements a feedback loop where the slip determination unit continuously monitors vehicle slip conditions, and based on this feedback, the controller adjusts the road wheel steering angles accordingly. When slipping is detected, the system steers the road wheels left or right, and when slip is resolved, it returns to the original angle, creating a closed-loop control system.
Data Source
AI summary
The present disclosure provides a steering control apparatus, a method therefor and a steering system, wherein, when a vehicle slips, the steering control apparatus increases traction by steering a road wheel to the left and right along a current steering direction. Particularly, the steering control apparatus comprises: a slip occurrence determination unit for determining whether or not the vehicle has slipped; a steering angle determination unit for, when it is determined that the vehicle has slipped, determining a current steering angle of a steering wheel as a reference steering angle; and a control unit for controlling a driving shaft so that the road wheel may be steered to the left and right within a first angle range on the basis of the reference steering angle.