Brake Shield Labyrinth Ventilation Debris Protection
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Solution Overview
Problem
Existing brake shields that protect disc brakes from debris often compromise cooling efficiency, as they either allow debris to reach the disc when open or trap debris when closed, failing to provide effective protection across the temperature range of the brake disc.
Innovation Solution
A brake shield made from labyrinth ventilation material with tortuous paths that allow air to flow while preventing the passage of debris, such as grit and water droplets, by using a sheet material with corrugated or louvred structures that constrain fluid flow to parallel paths, ensuring effective ventilation and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shield is fitted to protect the brake disc from debris, then protection from contamination is improved, but cooling air flow is reduced
Solution Approach 1:
The shield is segmented into multiple parallel labyrinthine paths that divide the flow of air while maintaining debris protection. Each path is a separate tortuous channel, allowing air to pass through multiple segments rather than a single blocked opening, thus resolving the contradiction between protection and cooling.
Solution Approach 2:
The shield transitions from a two-dimensional flat barrier to a three-dimensional labyrinthine structure with tortuous paths. This dimensional transformation allows air to flow through the shield's thickness via multiple winding channels while maintaining the protective function, simultaneously achieving both debris protection and adequate cooling airflow.
2Object-affected harmful factors
If the shield is in closed state to protect from debris, then protection is improved, but cooling efficiency deteriorates
Solution Approach 1:
The shield employs dynamic thermal expansion properties of the labyrinthine material. When the brake disc is cool, the shield maintains a closed state with overlapping edges for debris protection. When the brake disc heats up, thermal expansion causes the shield to change shape and open, allowing cooling air to flow to the disc directly, thus dynamically adapting to temperature conditions.
Solution Approach 2:
The shield utilizes changes in physical parameters (shape and opening state) in response to temperature changes. The material's dimensional parameters change with temperature, transforming the shield from a closed protective state at low temperatures to an open cooling state at high temperatures, resolving the contradiction between protection and cooling efficiency.
3Temperature
If the shield is in open state to allow cooling air flow, then cooling is improved, but debris protection deteriorates
Solution Approach 1:
Even in the open state, the shield maintains segmented labyrinthine paths rather than a completely open structure. The parallel tortuous channels continue to provide some debris filtration while allowing adequate cooling airflow, thus maintaining partial protection while achieving improved cooling.
4Object-affected harmful factors
If a complex shield arrangement is used to provide both protection and cooling, then performance is improved, but device complexity increases
Solution Approach 1:
The shield merges multiple functions into a single integrated structure. The same labyrinthine shield provides both debris protection and cooling airflow simultaneously, eliminating the need for separate protective and cooling components. This merging reduces overall device complexity while maintaining both protection and cooling performance.
Solution Approach 2:
The shield is designed as a multi-functional component that simultaneously performs debris protection, cooling airflow management, and thermal adaptation. This universal design consolidates multiple protective and cooling functions into one structure, reducing the number of separate components needed and simplifying the overall brake system.
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 facilitates cooling while preventing contamination, ensuring the brake disc remains protected from debris and water, even when submerged, with quick water drainage and improved protection for sensitive brake materials like carbon ceramic discs.
Implementation Method 1
a plurality of tortuous paths extend through the sheet material, distributed over the surface of the sheet, and the tortuous paths do not provide a line of sight through the material
Implementation Method 2
When the brake disc heats up the shield changes shape, to an open state, and allows cooling air to flow to the disc directly
Data Source
AI summary
A brake shield (4) includes a labyrinth ventilation material (5) though which air may pass, but which resists the passage of debris. The labyrinth ventilation material may be a sheet material and may define on or more tortuous paths through the material, wherein the one or more tortuous paths do not provide a line of sight through the material.