Disc Brake Force Modulation for Noise and Vibration Control
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Solution Overview
Problem
Current Brake-by-Wire (BBW) vehicle braking systems face challenges in reducing or eliminating noise and vibrations, requiring lengthy development times and significant resources due to inefficient testing processes.
Innovation Solution
A method for controlling braking force distribution in BBW systems using an active control algorithm that detects critical frequencies through sensors like microphones or accelerometers, adjusting braking forces to mitigate noise and vibrations by implementing time-variable force signals and altering the ratio of braking forces applied to disc brake pistons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If testing is performed on a prototype braking system during development, then noise and vibration issues can be optimized, but development time and resources are significantly increased
Solution Approach 1:
The patent applies preliminary action by determining a target distribution of braking forces before actual braking operation. The electronic control unit pre-calculates the optimal braking force distribution between left and right wheels based on desired vehicle deceleration, preventing noise and vibration issues before they occur during braking testing or operation.
Solution Approach 2:
The patent implements feedback by using sensors to detect actual vehicle deceleration and comparing it with desired deceleration. The electronic control unit continuously adjusts the distribution of braking forces based on this feedback, ensuring noise and vibration reduction while maintaining braking performance.
2Object-affected harmful factors
If testing is performed on a prototype braking system during development, then noise and vibration issues can be optimized, but resource consumption increases significantly
Solution Approach 1:
The patent applies self-service by enabling the braking system to automatically adjust its own braking force distribution without external testing or intervention. The electronic control unit autonomously monitors vehicle deceleration and redistributes braking forces as needed, eliminating the need for costly prototype testing and refinement cycles.
Solution Approach 2:
The patent replaces mechanical testing and physical prototype refinement with an electronic control system that uses sensors and algorithms to optimize braking force distribution. This substitution of mechanical testing with electronic control reduces resource consumption while achieving the same noise and vibration reduction goals.
3Object-affected harmful factors
If braking forces are distributed unevenly between left and right wheels, then noise and vibrations are reduced, but braking stability may be compromised
Solution Approach 1:
The patent applies dynamics by making the braking force distribution adaptive rather than static. The electronic control unit continuously adjusts the braking force distribution between left and right wheels based on real-time vehicle deceleration feedback, allowing the system to maintain braking stability while reducing noise and vibrations through dynamic redistribution.
Solution Approach 2:
The patent implements parameter changes by modifying the distribution of braking forces as a controllable parameter. The electronic control unit changes the braking force parameters applied to each wheel based on detected vehicle deceleration, optimizing both noise reduction and braking stability through dynamic parameter adjustment.
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
This approach reduces or eliminates noise and vibrations in vehicle braking systems, shortening development time and costs by enabling automatic actuation modifications based on real-time sensor data, thereby improving system performance and efficiency.
Implementation Method 1
detection, e.g., by means of a microphone or accelerometer, of current operating frequency information of the braking system
Data Source
AI summary
The invention relates to a method for controlling a braking system of a vehicle for distributing braking forces on at least one piston of a disc brake caliper of the vehicle. The method is performed by a braking system control system. The method comprises the steps of:receiving, by the control system, a request for applying a braking force following a braking action applied on a pedal/button of the braking system;applying the required braking force to the at least one piston;detecting a current characteristic frequency information of the braking system by means of at least one sensor operationally associated with the braking system, this characteristic frequency is representative of current noises and/or vibrations associated with the braking system;comparing this detected current characteristic frequency information with a reference characteristic frequency representative of a critical operating condition of the braking system;if the detected current characteristic frequency information of the braking system is equal to the reference characteristic frequency, the method further comprises the step of:applying to the at least one piston of a disc brake caliper of the vehicle an additional braking force generated by superimposing a force signal having a time-variable amplitude on said requested braking force.