Disk Brake Dust Suction Casing With Venturi Particle Extraction
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Solution Overview
Problem
Disc brakes in motor vehicles generate harmful brake dust during braking, which poses an environmental burden.
Innovation Solution
A disc brake system with a casing that partially encompasses the brake disc, incorporating a suction port and a suction device, such as a vacuum generator based on the Coanda or Venturi effect, to extract brake dust using a compressed air system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter is arranged in the structural element to absorb brake dust, then the environmental burden from brake dust is reduced, but the device complexity increases due to additional components
Solution Approach 1:
The suction device is integrated directly into the casing structure, combining the housing and particle extraction functions into a single unified component. This eliminates the need for separate structural elements and filters, reducing overall device complexity while maintaining the ability to capture brake dust particles.
Solution Approach 2:
The particle extraction function is separated from the main brake assembly and implemented as a distinct suction device connected to the casing. This allows the brake system to focus on its primary function while the extracted suction system handles particle removal, simplifying the overall design compared to integrating all functions into a single complex structure.
2Object-affected harmful factors
If a suction device is added to extract brake dust, then brake dust is captured more effectively, but the device complexity and space requirements increase
Solution Approach 1:
The suction device utilizes pneumatic principles to generate airflow that draws brake dust particles into the casing. This pneumatic approach replaces more complex mechanical collection systems, achieving effective particle capture through pressure differentials created by the pneumatic suction mechanism.
Solution Approach 2:
The suction device changes the airflow parameters within the brake assembly by introducing a controlled suction flow that alters the natural dispersion of brake dust. By modifying the airflow velocity and direction parameters, the system effectively directs particles toward the collection area without requiring additional mechanical components.
3Object-affected harmful factors
If the casing completely surrounds the brake disc, then particle extraction is improved, but the air gap for cooling and lubrication is reduced
Solution Approach 1:
The casing is designed to partially surround the brake disc rather than completely enclosing it, creating localized coverage where particle extraction is most needed. This partial enclosure maintains sufficient air gaps in critical areas for cooling and lubrication while providing adequate containment for particle capture in the braked zone.
Solution Approach 2:
The suction device is positioned to create a localized suction field that extends beyond the immediate casing area. This partial action approach allows the suction effect to reach particles in areas where the casing does not fully enclose the disc, maintaining cooling airflow while still achieving effective particle extraction.
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 the environmental impact by capturing and separating brake dust, utilizing a compact and reliable suction system that integrates with existing vehicle systems.
Implementation Method 1
the suction device is a vacuum generator whose operation is based on a Coanda effect
Implementation Method 2
the suction device is a vacuum generator whose operation is based on a Venturi effect
Implementation Method 3
a filter, in particular an air filter, is arranged in the dust container
Data Source
Figure 1
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AI summary
A disc brake (1) for a motor vehicle comprises a brake disc and a brake caliper (4) in which two brake pads and a mechanism for actuating the brake pads are arranged, as well as a casing (12) that partially encloses the brake disc. The casing (12) has a suction port () for particle extraction. In one embodiment, a compressed air-operated suction device (18) is attached to the suction port of the casing (12).