Parking Brake Control Using Front-Rear Force Distribution
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Solution Overview
Problem
Existing braking systems for motor vehicles, particularly those with electromechanical brakes, lack stability during parking on inclined surfaces and fail to provide redundancy in case of component failure, leading to potential vehicle movement.
Innovation Solution
A method and system that utilizes both rear and front wheel brakes for parking braking, with a control unit adjusting clamping forces dynamically based on slope and load conditions, ensuring redundancy and improved stability by allowing one brake to take over if the other fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only rear wheel brakes are used for parking braking, then the device complexity is reduced, but the vehicle stability on slopes deteriorates and reliability is compromised
Solution Approach 1:
The patent merges the parking braking function across all four wheel brakes (front and rear) instead of using only rear wheel brakes. The control unit coordinates all wheel brakes to generate holding braking force, combining their effects to improve vehicle stability on slopes while maintaining system reliability through distributed braking force.
Solution Approach 2:
The patent segments the parking braking function across multiple independent wheel brakes (front left, front right, rear left, rear right) rather than relying on a single brake assembly. This segmentation allows the system to distribute the holding braking force across multiple points of contact, improving stability and providing redundancy if one brake fails.
2Device complexity
If only rear wheel brakes are used for parking braking, then the device complexity is reduced, but the reliability deteriorates due to lack of redundancy
Solution Approach 1:
The patent segments the parking braking function across multiple independent wheel brakes (front left, front right, rear left, rear right) rather than relying on a single brake assembly. This segmentation allows the system to distribute the holding braking force across multiple points of contact, improving stability and providing redundancy if one brake fails.
Solution Approach 2:
The control unit monitors the operational status of all wheel brakes and pre-configures redundancy relationships. If a failure is detected in one wheel brake, the system automatically compensates by increasing the clamping force on remaining functional brakes, providing fail-safe operation before critical failure occurs.
3Stability of the object's composition
If clamping forces are dynamically adjusted based on slope and load conditions, then the vehicle stability is improved, but the control complexity increases
Solution Approach 1:
The control unit dynamically adjusts the clamping force of each wheel brake based on real-time operating conditions including slope angle, vehicle load, and brake operational status. The system transitions from static to dynamic control, optimizing the distribution of holding braking force across all wheel brakes to maintain vehicle stability under varying conditions.
Solution Approach 2:
The control unit receives feedback signals about the operational status of wheel brakes and environmental conditions (slope, load), processes this information, and adjusts the clamping force accordingly. This closed-loop control ensures optimal vehicle stability while adapting to changing conditions without requiring overly complex manual intervention.
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 stability on slopes by distributing clamping forces effectively and provides fail-safe operation even in the event of brake or control system failures.
Implementation Method 1
a clamping force induced by the at least one rear wheel brake and a clamping force induced by the at least one front wheel brake are present to cause a desired holding braking force
Data Source
AI summary
A method for operating a braking system for a motor vehicle is proposed. The method includes the step of operating at least one rear wheel brake and at least one front wheel brake to perform a parking braking function when there is a requirement for parking braking. Furthermore, a braking system, a method for controlling it, a computer program, a control unit and a motor vehicle are proposed.