Braking Lateral Pull Correction via Wheel Angular Acceleration
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Solution Overview
Problem
Existing methods for controlling lateral draft during motor vehicle braking are slow and noticeable to the driver, leading to an annoying feeling of loss of control, particularly in small vehicles with short wheelbases.
Innovation Solution
A method that calculates the difference in angular accelerations between left and right wheels and adjusts the drag forces accordingly to rapidly correct the lateral pull by increasing the drag force on one wheel and reducing it on the other, using a correction value proportional to the acceleration difference, which is continuously applied from the onset of braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brake control methods are used to correct lateral draft, then the lateral pull is corrected, but the correction is slow and noticeable to the driver, causing a feeling of loss of control
Solution Approach 1:
The control system calculates the angular acceleration difference between left and right wheels in real-time and applies corrective drag force adjustments immediately, before the driver can perceive the lateral pull. This preliminary correction action prevents the driver from noticing the instability rather than correcting it after detection.
Solution Approach 2:
The patent replaces conventional mechanical brake control with an electronically controlled drag force adjustment system. By using actuators to modify drag forces on individual wheels based on calculated angular acceleration differences, the system achieves faster and more precise correction compared to traditional mechanical brake systems.
2Reliability
If the drag force is adjusted to correct lateral pull, then braking stability is improved, but the control system complexity increases
Solution Approach 1:
The control system automatically detects angular acceleration differences between wheels and self-corrects the lateral pull by adjusting drag forces on individual wheels. This self-service mechanism eliminates the need for manual driver intervention and reduces the complexity of external control systems while maintaining braking stability.
Solution Approach 2:
The system continuously monitors angular acceleration of each wheel and uses this feedback to dynamically adjust drag forces. The feedback loop compares the angular acceleration difference against a threshold and applies corrective drag forces only when needed, optimizing the balance between braking stability and control system simplicity.
Data Source
Figure 1~3
AI summary
The invention relates to a method for controlling lateral pulling of a moving motor vehicle (1) during braking, characterized in that said method comprises the following steps: a) calculating a representative value of the variation between the angular accelerations of the left (2) and right (3) wheels of the wheelset (4); b) calculating a correction value; c) for each wheel (2,3) of the wheelset (4), controlling the associated braking means (6) in such a way as to modify the drag force applied by the associated braking means (6) as a function of the correction value calculated in step b).