Steering-Angle Brake Force Distribution for Vehicle Stability
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Solution Overview
Problem
Conventional braking control devices lack effective means to improve vehicle straight advancing stability and turning responsiveness during braking, particularly in relation to steering angle detection.
Innovation Solution
A braking control device that includes a first braking unit for the steering wheel and a second braking unit for the non-steering wheel, with a control device that adjusts the braking force distribution based on steering angle information to enhance stability and responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking force distribution between front and rear wheels is determined only based on brake operation amount and steering wheel operation amount, then the control system remains simple, but the straight advancing stability and turning responsiveness during vehicle turning cannot be sufficiently improved
Solution Approach 1:
The control device acquires steering angle-related values in advance and uses them proactively to adjust braking force distribution. By detecting the steering angle before turning occurs and preparing the appropriate braking force distribution, the system improves straight advancing stability and turning responsiveness without requiring complex real-time adjustments during turning maneuvers.
Solution Approach 2:
The braking force distribution is made dynamic by continuously adjusting it based on the detected steering angle-related value. The control device changes the braking force distribution between front and rear wheels according to the steering angle, enabling the system to adapt to different turning conditions and improve both stability and responsiveness.
2Reliability
If the ratio of regenerative braking force to friction braking force is changed based on steering wheel operation amount, then some posture control is achieved, but the turning responsiveness and straight advancing stability are not sufficiently improved
Solution Approach 1:
The control device applies different braking force distributions to different wheels based on the steering angle-related value. By independently controlling the braking force on front and rear wheels according to the detected steering angle, the system creates localized braking effects that improve turning responsiveness while maintaining overall vehicle stability and ease of handling.
3Ease of operation
If the braking force distribution is not adjusted based on steering angle, then the control system remains simple to operate, but the ease of turning and straight advancing stability cannot be optimized
Solution Approach 1:
The control device automatically adjusts the braking force distribution based on the detected steering angle-related value without requiring driver intervention. The system self-regulates the braking forces on front and rear wheels according to the steering angle, improving ease of turning and straight advancing stability while keeping the operation simple for the driver.
Data Source
AI summary
A control device includes: a first braking unit, that applies a first braking force to a steering wheel of a vehicle; a second braking unit, that applies a second braking force to a non-steering wheel of the vehicle; and a control device that controls the first braking unit, and the second braking unit, according to a target braking force, where the control device includes a steering angle information acquiring unit that acquires a steering angle-related value related to a steering angle of the steering wheel, and a distribution changing unit that executes a distribution change control of changing a braking force distribution between the first braking force and the second braking force based on the steering angle-related value when the target braking force is applied.