Brake Unit Radial Flange Mounting for Bulkhead Noise Decoupling
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Solution Overview
Problem
Modern brake units mounted on vehicle bulkheads experience direct structure-borne sound transmission due to the bulkhead acting as an amplifying diaphragm, leading to noise issues, especially in autonomous driving systems, where acoustic decoupling is crucial but challenging due to limited structural space.
Innovation Solution
A radial flange on the brake unit's housing with a vibration-damping element between the bulkhead and housing, and a fastening element that engages around the flange without direct contact, ensuring acoustic decoupling while optimizing structural space, using elastomer materials for damping and secure fastening options like screws or welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the brake unit is mounted directly on the bulkhead, then the structural space is optimized, but structure-borne sound is directly transmitted into the motor vehicle
Solution Approach 1:
A bearing block is introduced as an intermediary component between the brake unit housing and the bulkhead. This bearing block serves as a mediator that acoustically decouples the brake unit from the bulkhead, preventing structure-borne sound transmission while maintaining the compact mounting arrangement. The bearing block is fastened to the bulkhead with fastening elements that engage around a radial flange on the housing.
2Object-affected harmful factors
If a separate bearing block is provided for acoustic decoupling, then structure-borne sound transmission is reduced, but the structural space conditions are not met
Solution Approach 1:
The bearing block is designed to integrate closely with the brake unit housing through the radial flange connection. The bearing block and housing are positioned adjacent to each other with the flange providing a compact interface, merging their functional spaces while maintaining acoustic decoupling. This integration allows the bearing block to be accommodated within the existing structural space constraints.
3Ease of manufacture
If the bulkhead serves as an amplifying diaphragm surface, then the brake unit is easily mounted, but noise reaches occupants in unimpeded fashion
Solution Approach 1:
The bearing block acts as an intermediary that breaks the direct acoustic path between the brake unit and the bulkhead. While the bulkhead remains the mounting surface for the bearing block, the bearing block itself serves as the acoustic barrier, preventing the bulkhead from functioning as an amplifying diaphragm for brake unit noise.
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 solution effectively decouples the brake unit from the bulkhead, reducing noise transmission and maintaining structural integrity without additional space, ensuring comfort and reliability in autonomous driving scenarios.
Implementation Method 1
a vibration-damping element is arranged between the bulkhead and the housing surface facing toward the bulkhead
Implementation Method 2
using elastomer materials for damping
Data Source
AI summary
A motor vehicle having a bulkhead includes: a brake unit, a housing of which is fastenable to the bulkhead of the motor vehicle. An actuating member for actuation of the brake unit extends through the bulkhead. A radial flange is provided on a housing surface facing toward the bulkhead. On the bulkhead, there is provided at least one corresponding fastening element which at least partially engages around the radial flange.