Segmented Brake Piston Design for Uniform Pressure Distribution
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Solution Overview
Problem
Existing brake pistons suffer from large weight and height costs, and fail to consistently generate uniform contact and pressure between the brake disc and pad, leading to non-uniform wear, squeal noises, and uneven frictional heat during braking.
Innovation Solution
A brake piston design featuring a first member with a plurality of pipe-shaped second members, each with a smaller radial dimension than the first member, allowing for reduced diameter and weight, and enabling locally varying brake pressure distribution through off-center and varying radial dimensions, which can be produced with optimized materials and methods for individual functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a conventional cylindrical brake piston with constant diameter is used, then the structure is simple and easy to manufacture, but the weight and size are large
Solution Approach 1:
The brake piston is divided into multiple segments with different radial dimensions along its longitudinal axis. Specifically, it comprises a first piston end portion, a central portion with reduced radial dimension, and a second piston end portion. This segmentation allows the piston to reduce overall volume and weight while maintaining structural integrity and functional performance.
2Quantity of substance
If a brake piston with reduced central portion is used, then the brake fluid intake is reduced, but the contact pressure uniformity between brake pad and disc deteriorates
Solution Approach 1:
The brake piston features locally varied radial dimensions tailored to specific functional requirements. The central portion has a reduced radial dimension to minimize brake fluid volume, while the first and second piston end portions maintain larger radial dimensions to ensure uniform contact pressure distribution with the brake pad and disc, respectively. This local quality differentiation resolves the contradiction between fluid volume reduction and pressure uniformity.
3Volume of moving object
If multiple pipe-shaped second members are used, then the piston diameter is reduced and compactness is improved, but the manufacturing complexity increases
Solution Approach 1:
The brake piston integrates multiple pipe-shaped second members (at least two) that extend along the longitudinal axis, each with different radial dimensions. These members are combined within a single piston structure, allowing volume reduction while managing manufacturing complexity through integrated design. The merging of multiple functional elements into one component achieves compactness without requiring separate assemblies.
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 design reduces the size and weight of the brake piston, minimizes brake fluid volume, and enhances uniform contact and pressure distribution, reducing wear and noise while improving compactness and manufacturing flexibility.
Implementation Method 1
By varying a hydraulic pressure in said hydraulic chamber, the brake piston can be moved back and forth, thus acting on a brake pad
Implementation Method 2
The brake pad can thus be pressed into contact with e.g. a brake disc to generate brake forces
Data Source
AI summary
The invention concerns a brake piston for a vehicle brake, the brake piston comprising:a first member comprising a first piston end portion for resting against a brake pad of the vehicle brake;a plurality of pipe-shaped second members that are each integrally formed with or connected to the first member and each comprise at least one brake fluid receiving portion that extends along a longitudinal axis of the brake piston.