Disc Brake Noise Reduction via Electronic Actuator Control
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Solution Overview
Problem
Existing motor-vehicle disc brake noise reduction solutions are complex and ineffective, failing to fully address noise issues during braking and non-braking conditions without compromising safety.
Innovation Solution
A method involving sensors to detect noise parameters and an electronic controller that activates noise attenuation functions, reducing actuation pressure during braking and temporarily activating the fluid actuator when the vehicle is not braking, while ensuring safety and adaptability to various driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If existing noise reduction devices are implemented, then disc brake noise is reduced, but device complexity increases and performance remains insufficient
Solution Approach 1:
The system uses sensors to detect noise levels from disc brakes and feeds this information back to an electronic controller. The controller then automatically adjusts brake actuation pressure or activates attenuation functions based on the detected noise levels, creating a closed-loop feedback system that reduces noise without requiring complex mechanical modifications to the brake assembly itself
Solution Approach 2:
The invention replaces complex mechanical noise reduction devices with an electronic control system that uses sensors, microprocessors, and fluid pressure control to achieve noise attenuation. This electronic approach substitutes mechanical complexity with electronic intelligence and software-based noise attenuation algorithms
2Object-affected harmful factors
If noise attenuation functions are activated, then disc brake noise is reduced, but braking safety may be compromised
Solution Approach 1:
The system dynamically adjusts noise attenuation strategies based on real-time driving conditions, vehicle speed, and brake usage patterns. The electronic controller modulates the attenuation function intensity and timing to ensure safety is maintained while achieving noise reduction, allowing the system to adapt its behavior rather than applying fixed attenuation rules
Solution Approach 2:
The system changes operational parameters such as fluid actuator pressure levels and attenuation function activation timing based on detected noise conditions and driving context. By dynamically adjusting these parameters, the system achieves noise reduction while maintaining adequate braking force and safety margins through intelligent parameter modulation rather than fixed reductions
3Measurement precision
If sensor-based noise detection is implemented, then noise levels are accurately detected, but manufacturing costs increase
Solution Approach 1:
The system uses existing multi-functional vehicle sensors and electronic control units that already serve other vehicle functions. By programming these existing components to also detect and respond to brake noise, the system achieves accurate noise detection without adding dedicated noise sensors, thereby avoiding the cost increase that would result from adding specialized single-function components
Solution Approach 2:
The electronic controller and existing sensor network serve dual purposes: their primary vehicle control functions plus noise detection and attenuation. This self-service approach allows the system to achieve accurate noise measurement using components already present in modern vehicles, eliminating the need for additional dedicated noise sensing hardware and reducing overall manufacturing costs
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
Effectively reduces or eliminates disc brake noise in both braking and non-braking scenarios without affecting vehicle safety, with the ability to adapt to different driving conditions and alert drivers to potential issues.
Implementation Method 1
The sensors associated with the disc brakes can be, for example, vibration sensors of any known type, for example, accelerometers or piezoelectric sensors.
Implementation Method 2
The sensors associated with the disc brakes can be, for example, vibration sensors of any known type, for example, accelerometers or piezoelectric sensors.
Data Source
AI summary
A vehicle braking system includes a controller that receives signals from sensors associated with vehicle disc brakes, which allow detection of a parameter indicative of a degree of noise generated from each disc brake. When noise generation is detected, the controller activates a noise attenuation function of a first type if the vehicle is braking, and of a second type if the vehicle is not braking. The first type involves reducing actuating pressure of a fluid actuator associated with the disc brake for which noise generation is detected. The second type involves temporarily activating, while the vehicle is running and not braking, the fluid actuator associated with the disc brake which is generating noise. The controller also receives signals indicative of vehicle operating parameters which allow conditions to be defined in which priority is given to vehicle safety, and in which the noise attenuation function is excluded.