Brake Dust Filtration in Vented Disk Brakes Using Guided Airflow
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Solution Overview
Problem
Existing disk brake systems fail to effectively prevent the release of brake dust into the environment, despite previous attempts at containment through filters and other mechanisms.
Innovation Solution
A disk brake device with a brake dust filter housing and means for forced guidance of brake dust, where the guidance is integrated into the brake caliper and brake pads, using guide plates or brake dust guidance elements to direct abraded particles radially inward along the friction surfaces to a filter housing, leveraging existing cooling channels for air flow to aid in dust collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a brake dust filter housing is arranged downstream from the brake caliper, then brake dust can be collected, but brake dust still escapes into the environment before reaching the filter
Solution Approach 1:
A guide plate is introduced as an intermediary component between the brake pad and the filter housing. This guide plate actively directs the brake dust particles along a defined path toward the filter, preventing uncontrolled dispersion into the environment while maintaining system simplicity.
Solution Approach 2:
The brake dust collection system is segmented into distinct functional zones: the brake pad generation zone, the guide plate transport zone, and the filter housing collection zone. This segmentation allows each component to perform its specific function efficiently, with the guide plate serving as a dedicated transport mechanism.
2Object-generated harmful factors
If a large container is used to collect all abraded particles during the service life of brake pads, then complete collection is achieved, but the device becomes bulky and complex
Solution Approach 1:
The guide plate performs preliminary action by directing and concentrating brake dust particles toward the filter housing during the braking process. This preliminary guidance ensures that particles are systematically transported to the collection point, maximizing the efficiency of a compact filter housing.
Solution Approach 2:
The system utilizes air flow (pneumatics) generated during braking to transport brake dust particles through the guide plate and into the filter housing. This natural air flow mechanism eliminates the need for additional mechanical transport devices, keeping the system compact.
3Object-generated harmful factors
If brush seals are used to enclose the brake caliper, then some dust containment is achieved, but no effective flow guidance for brake dust is provided
Solution Approach 1:
The guide plate serves as an active intermediary that not only contains brake dust but also provides positive flow guidance. Unlike passive brush seals, the guide plate actively directs particles along a defined path, combining containment and flow control functions in a single component.
4Object-generated harmful factors
If flushing air supply and discharge are implemented near the brake pad, then brake dust can be discharged, but the system complexity increases without sufficient dust prevention
Solution Approach 1:
The guide plate utilizes the natural air flow already present during braking to transport brake dust particles. This self-service approach leverages the existing pneumatic environment without requiring additional flushing air supply systems, maintaining simplicity while achieving effective dust transport.
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 solution significantly minimizes brake dust release into the environment by ensuring it is directed to a filter, allowing for a more compact design and efficient collection, while maintaining cost-effectiveness and simplicity in production.
Implementation Method 1
which are connected, in terms of flow, to cooling channels in the interior of the brake disk
Implementation Method 2
The filter contains means that cause the abraded brake particles entrained by the air flow to be introduced into the filter
Data Source
AI summary
A disk brake device for a vehicle, that includes an internally-ventilated or solid brake disk. The internally-vented brake disk is configured having ventilation openings on the vehicle side, on the radial inside in the region of a brake disk chamber, which ventilation openings are fluidically connected to cooling channels in the interior of the brake disk. The solid brake disk is configured without such ventilation openings and with cooling channels. A brake caliper fitting is configured over the brake disk with a brake pad arranged on both sides of the brake disk. The brake disk device is configured with a brake dust filter housing that encompasses the brake disk on the radial outside and is arranged downstream of the brake caliper, together with the brake pads. The disk brake device has at least one means for forced guidance of brake dust.