Brake Disc Ventilated Variable Resistant Section

Solution Overview

Problem

Prior brake discs suffer from inefficient ventilation and heat dissipation due to the width and shape of connection elements, which also increase the mass and gyroscopic effect, making it difficult to optimize ventilation efficiency while reducing mass.

Innovation Solution

The brake disc design features connection elements with a variable resistant section and radial extensions that enhance ventilation channels, allowing for improved airflow and reduced mass, while the drive elements engage both flanges to transmit braking forces efficiently, separating structural and fluid dynamic functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the connection elements have significant overall dimensions to guarantee sufficient resistant section, then the structural strength is improved, but the section of ventilation channels is reduced and mass increases

Engineering Contradiction:

Improveresistant section of connection elementsVSAvoidmass of brake disc

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The connection elements have variable resistant section along their length, with greater section at the ends where structural strength is needed for connecting flanges, and reduced section in the middle portion to maximize ventilation channel area. This local differentiation of properties resolves the contradiction between structural strength and ventilation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The connection elements extend in the radial dimension of the brake disc, with their resistant section varying along the radial direction. This dimensional approach allows optimization of both structural strength (at flange interfaces) and ventilation (in the disc interior) by strategically placing material where it is most needed.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Strength

If the connection elements have significant overall dimensions to guarantee sufficient resistant section, then the structural strength is improved, but the ventilation efficiency is reduced

Engineering Contradiction:

Improveresistant section of connection elementsVSAvoidventilation efficiency

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The connection elements have variable resistant section along their length, with greater section at the ends where structural strength is needed for connecting flanges, and reduced section in the middle portion to maximize ventilation channel area. This local differentiation of properties resolves the contradiction between structural strength and ventilation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The connection elements are conceptually divided into different functional zones: end portions for structural connection and middle portions for ventilation. This segmentation allows each zone to be optimized for its specific function, with the resistant section varying to balance structural and fluid dynamic requirements.

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If the connection elements have significant overall dimensions, then the structural integrity is improved, but the gyroscopic effect increases

Engineering Contradiction:

Improvestructural integrityVSAvoidgyroscopic effect

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The connection elements have variable resistant section along their length, with greater section at the ends where structural strength is needed for connecting flanges, and reduced section in the middle portion to maximize ventilation channel area. This local differentiation of properties resolves the contradiction between structural strength and ventilation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The resistant section parameter of the connection elements is changed along their length, transitioning from larger dimensions at the ends to smaller dimensions in the middle. This parameter variation reduces the overall mass and gyroscopic effect while maintaining structural integrity where it is most critical.

Inventive Principle:

Principle #35Parameter changes

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 design achieves optimal heat dissipation and reduced mass, enhancing ventilation efficiency and structural integrity by optimizing the shape of connection elements and drive elements, allowing for better airflow and reduced gyroscopic effect.

Implementation Method 1

the connection elements do not allow optimal air flow

Methodology Applied

Scientific EffectAir flow:

Implementation Method 2

transforming kinetic energy into heat energy by means of friction between the disc and pads

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

achieve efficient heat dissipation into the environment

Methodology Applied

Scientific EffectHeat dissipation: Convection

Data Source

PatentUS8733517B2Brake disc ventilated

Publication Date: 2014.05.27 FRENI BREMBO SPA

AI summary

A brake disc of a rotation axis, comprising a support carrier, a braking band comprising two flanges connected by a plurality of connection elements which define ventilation channels for the braking band, at least one drive element able to connect the support carrier and the braking band to each other. The connection elements have a variable resistant section in an axial direction parallel to the rotation axis, the resistant section being measured in an area substantially parallel to the direction of the air flow inside the ventilation channels. Such resistant section progressively increasing as it moves from a median resistant section towards the respective connection resistant sections of the connection element to the flanges.