Regenerative Braking Anti-Lock Control for Vehicle Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing anti-lock brake systems (ABS) in vehicles fail to maintain stability during regenerative braking, leading to discomfort and potential safety risks due to sudden deceleration changes and inability to adapt to varying road adhesion conditions.
Innovation Solution
A regenerative braking anti-lock control system that activates a regenerative braking anti-lock mode when the hydraulic anti-lock brake unit fails, adjusting the actual regenerative torque output by the motor to prevent wheel locking and maintain vehicle stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If regenerative braking is applied during hydraulic brake failure, then energy recovery is achieved, but wheel locking occurs and vehicle stability deteriorates
Solution Approach 1:
The control system continuously monitors wheel speed and calculates wheel deceleration to detect locking tendency. When wheel deceleration exceeds a threshold indicating locking risk, the system provides feedback to reduce regenerative braking torque, preventing wheel lockup and maintaining vehicle stability while still recovering energy.
Solution Approach 2:
The regenerative braking torque is dynamically adjusted based on real-time wheel conditions. The system transitions from fixed torque application to variable torque control, modulating the motor torque according to wheel deceleration feedback to prevent locking while maximizing energy recovery under varying road adhesion conditions.
2Productivity
If regenerative braking torque is increased to improve deceleration performance, then braking efficiency improves, but wheel locking tendency increases on low-adhesion roads
Solution Approach 1:
The system uses wheel deceleration feedback to adapt regenerative braking torque to current road conditions. By continuously monitoring wheel speed changes and comparing against thresholds, the system automatically adjusts torque to match road adhesion levels, maintaining high braking efficiency on high-adhesion surfaces while preventing lockup on low-adhesion surfaces.
Solution Approach 2:
The control system changes the torque parameter dynamically based on detected wheel conditions. When wheel deceleration indicates low-adhesion conditions or locking tendency, the system modifies the regenerative braking torque parameter to prevent locking, thereby adapting to varying road conditions while maintaining overall braking efficiency.
3Reliability
If hydraulic anti-lock brake unit is used for wheel locking prevention, then wheel locking is prevented, but system complexity increases and reliability decreases when hydraulic system fails
Solution Approach 1:
The patent extracts the anti-lock braking function from the hydraulic system and implements it independently through the motor controller. By using the motor's torque control capability to prevent wheel locking, the system eliminates dependence on the hydraulic anti-lock brake unit, reducing overall system complexity while maintaining reliability through a simpler electrical control approach.
Solution Approach 2:
The system replaces the mechanical-hydraulic anti-lock braking mechanism with an electrical control approach. The motor controller uses electrical torque modulation to prevent wheel locking, substituting the complex hydraulic valve and pressure control system with a simpler electronic control system that achieves the same anti-lock function.
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
Enhances vehicle driving stability and safety by preventing wheel locking and adapting to changing road conditions, ensuring smooth deceleration without hydraulic braking intervention.
Implementation Method 1
each of the motors is configured to drive one of the wheels
Implementation Method 2
a locking tendency of at least one of the wheels
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
A regenerative braking anti-lock control method, device, system for a vehicle, and the vehicle, which relates to the field of vehicle technology. The method comprises: in response to the required regenerative torque of the plurality of wheels, a braking state of the hydraulic brake module, and a locking tendency of at least one of the wheels meeting a first preset condition, activating a regenerative braking anti-lock mode; wherein, the braking state of the hydraulic brake module comprises the state of a hydraulic anti-lock brake unit, and the first preset condition comprises: the state of the hydraulic anti-lock brake unit is in a fault state; and adjusting the actual regenerative torque outputted by the motor according to the locking tendency and the required regenerative torque of the wheel in response to the regenerative braking anti-lock mode being in an activated state.