Electrohydraulic Brake Module Mount Failure Acoustic Warning
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Solution Overview
Problem
Existing brake systems, particularly in electrohydraulic and brake-by-wire systems, face challenges in detecting a loss of support or failure of the holding device, leading to potential brake fluid loss and pressure loss, which can result in a total brake system failure without immediate indication.
Innovation Solution
A mechanical stop device is integrated into the brake control module, positioned at a defined distance from adjacent vehicle components, which generates a repetitive acoustic warning signal due to vibrational excitations during driving, alerting the user to a potential loss of support or failure of the holding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a holding device is used to mount the brake control module to the vehicle body, then the brake control module can be securely positioned, but the holding device may break or loosen without immediate detection
Solution Approach 1:
The brake control module uses its own weight and the vibrational excitations from vehicle operation to automatically detect holding device failures. The system monitors itself by detecting changes in its own position and vibrations without requiring external monitoring systems.
Solution Approach 2:
The system uses vibrational excitations from the vehicle chassis and operation to create detectable signals. When the holding device fails, the changed vibration pattern of the brake control module serves as the detection mechanism, converting mechanical vibrations into a failure indication.
2Measurement precision
If electronic monitoring systems are used to detect holding device failures, then detection accuracy can be improved, but system complexity and cost increase
Solution Approach 1:
The brake control module monitors itself using its own weight and vibrational characteristics. The control unit processes signals from the acceleration sensor that detect changes in the module's own state, eliminating the need for separate monitoring systems.
Solution Approach 2:
The system replaces complex electronic monitoring with a simple acceleration sensor that detects mechanical vibrations and position changes. The sensor signals are processed by the existing control unit, substituting elaborate monitoring electronics with a straightforward mechanical-vibration-based detection method.
3Adaptability or versatility
If the brake control module is mechanically decoupled from the bulkhead, then mounting flexibility is improved, but loss of support becomes harder to detect
Solution Approach 1:
The system uses vibrational excitations from vehicle operation to create detectable signals. When support is lost, the changed vibration pattern of the brake control module serves as the detection mechanism, allowing detection regardless of mounting position.
Solution Approach 2:
The brake control module monitors its own support status by detecting changes in its position and vibrational characteristics. The system uses its own weight and operational vibrations to automatically detect when mounting support is lost.
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
The mechanical stop device effectively and reliably alerts the user to a potential failure of the holding device, preventing damage to the brake system by providing a simple, inexpensive, and non-electronic means of monitoring the brake assembly's integrity.
Implementation Method 1
the stop device interacts with the in particular directly adjacent vehicle component, by repeatedly hitting or striking it, due to vibrational-mechanical excitation of the chassis during driving
Implementation Method 2
the stop device interacts with the in particular directly adjacent vehicle component, by repeatedly hitting or striking it
Data Source
AI summary
An assembly for an electrohydraulic brake system of a vehicle, including at least one brake control module which has an electronically actuated pressure supply device which, in the installed state of the assembly, is fluidically coupled to at least one wheel brake of the vehicle. The brake control module is connected to a holding device for arrangement on a vehicle body. The brake control module includes a mechanical stop device which, when the assembly is installed, is spaced apart at a distance from an adjacent vehicle component and, by interaction with the vehicle component, emits a warning signal in the event of a loss of support of the brake control module.