Brake Pad Insert for Wet Braking Film Vaporization
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Solution Overview
Problem
Existing brake pad systems under wet conditions face challenges in effectively removing the liquid film from the brake disk surface without causing additional wear and relying on complex electronic controls and sensors.
Innovation Solution
Incorporating a densified temperature-resistant fibre-containing insert within the brake pad that radially extends over at least 50% of the friction path, disrupting the liquid film and enhancing friction to vaporize the liquid through heat dissipation, without the need for elaborate electronic controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brake pads are pressed onto the brake disk with low pressure to remove liquid film, then wet braking performance is improved, but additional wear occurs on the brake disk and brake pads
Solution Approach 1:
The brake pad incorporates a porous insert made of densified temperature-resistant fiber-containing material that absorbs the liquid film from the brake disk surface through capillary action, eliminating the need for friction-based wiping and reducing wear
Solution Approach 2:
The insert material is designed with specific porosity and thermal properties to absorb liquid and generate sufficient heat through normal braking friction to vaporize the absorbed liquid, transforming the approach from mechanical wiping to thermal-evaporative removal
2Reliability
If controlled additional braking processes are used to remove liquid film, then wet braking performance is improved, but elaborate sensing and control mechanisms are required
Solution Approach 1:
The porous insert automatically absorbs liquid film during normal braking operations without requiring external sensing or control systems, as the absorption and vaporization process occurs passively through the material's inherent properties
Solution Approach 2:
The liquid film removal function is extracted from the active control system and embedded into the passive brake pad structure through the porous insert, eliminating the need for separate sensing and control mechanisms
3Reliability
If brake pads continuously press against brake disk to prevent liquid film formation, then wet braking performance is maintained, but energy is wasted and wear increases
Solution Approach 1:
The porous insert performs liquid film removal autonomously during normal braking operations, converting waste heat that would otherwise be dissipated into useful energy for vaporizing the absorbed liquid, thereby eliminating the need for additional energy-consuming braking cycles
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 improves wet braking performance by maintaining high friction coefficients and reducing wear, achieving self-accelerating vaporization of the liquid film without complex control mechanisms.
Implementation Method 1
friction contact between brake disk and the insert within the brake pads which generates heat dissipation in the friction zone that suffices to vapourise at least a part of the liquid
Implementation Method 2
generates heat dissipation in the friction zone that suffices to vapourise at least a part of the liquid
Implementation Method 3
hydrodynamic gliding with very low coefficient of friction in the area of contact between the non-modified part of the brake pad and the brake disk
Data Source
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AI summary
The invention relates to a brake system comprising a brake disk and at least one brake pad, characterised in that the brake pad has an insert of a densified temperature-resistant fibre-containing material, which insert radially extends over at least 50 % of the radial extension of that brake pad.