Floating Disc Brake Caliper Ventilation for Heat and Weight

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Solution Overview

Problem

Existing disc brake calipers face challenges in achieving high structural rigidity while minimizing weight and dimensions, and in effectively dissipating heat generated during braking, with known solutions often resulting in bulky and heavy designs that compromise performance and ease of assembly.

Innovation Solution

A disc brake caliper body with a floating element that includes a plate-shaped portion with projections forming a ventilation channel, allowing for radial airflow to dissipate heat while maintaining structural integrity and reducing weight, comprising a bracket and sliding floating element with biasing devices to apply braking action.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the caliper body structure is made extremely rigid to maintain structural integrity during braking, then structural rigidity is improved, but the weight and dimensions of the caliper body increase

Engineering Contradiction:
Improvestructural rigidityVSAvoidcaliper body weight
Core Design Contradiction:
StrengthVSWeight of moving object

Solution Approach 1:

The patent applies local quality by creating a cellular structure with varying cell densities in different regions of the caliper body. Areas requiring higher rigidity have denser cell configurations, while less critical areas have sparser structures. This allows the caliper to achieve necessary structural integrity at braking stress points without uniformly increasing weight throughout the entire component.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent employs composite materials by combining a base metal matrix with a cellular foam structure. This composite approach creates a material that exhibits both the strength characteristics of solid metal and the weight reduction benefits of porous structures. The cellular composite provides high strength-to-weight ratio while maintaining the structural rigidity required for brake caliper application.

Inventive Principle:
Principle #40Composite materials

2Weight of moving object

If the caliper body dimensions are reduced to decrease unsprung weight, then weight is improved, but structural rigidity and heat dissipation capability deteriorate

Engineering Contradiction:
Improveunsprung weightVSAvoidstructural rigidity
Core Design Contradiction:
Weight of moving objectVSStrength

Solution Approach 1:

The patent utilizes porous materials by implementing a cellular structure with controlled porosity throughout the caliper body. The cellular foam creates a three-dimensional network of cells that provides structural support while reducing material density. This porous architecture maintains structural rigidity despite reduced overall dimensions and weight, as the cell walls distribute and transmit mechanical loads effectively throughout the structure.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The patent applies dimensionality change by transitioning from a solid two-dimensional cross-section to a three-dimensional cellular structure. The cellular configuration adds a vertical dimension through multiple cell layers, creating a volumetric network that provides structural strength comparable to solid materials but with reduced mass. This three-dimensional architecture enables the caliper to maintain rigidity at smaller dimensions.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Strength

If the caliper body structure is made extremely rigid to prevent yielding feeling, then structural rigidity is improved, but the dimensions and weight increase

Engineering Contradiction:
Improvestructural rigidityVSAvoidcaliper body volume
Core Design Contradiction:
StrengthVSVolume of moving object

Solution Approach 1:

The patent applies local quality by creating a cellular structure with varying cell densities in different regions of the caliper body. Areas requiring higher rigidity have denser cell configurations, while less critical areas have sparser structures. This allows the caliper to achieve necessary structural integrity at braking stress points without uniformly increasing weight throughout the entire component.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent employs segmentation by dividing the caliper body into multiple cellular units arranged in a grid-like pattern. Each cell acts as an independent structural element that contributes to the overall rigidity. This segmented cellular architecture provides cumulative structural strength comparable to solid materials but with reduced volume, as the cells are distributed throughout the structure rather than requiring a solid mass.

Inventive Principle:
Principle #1Segmentation

4Temperature

If ventilation channels are added to improve heat dissipation, then heat dissipation is improved, but structural integrity and aeration may be compromised

Engineering Contradiction:
Improveheat dissipationVSAvoidstructural integrity
Core Design Contradiction:
TemperatureVSStrength

Solution Approach 1:

The patent utilizes porous materials by implementing a cellular structure with controlled porosity throughout the caliper body. The cellular foam creates a three-dimensional network of cells that provides structural support while reducing material density. This porous architecture maintains structural rigidity despite reduced overall dimensions and weight, as the cell walls distribute and transmit mechanical loads effectively throughout the structure.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The patent applies multi-functionality by designing the cellular structure to simultaneously serve multiple functions: structural support, weight reduction, and heat dissipation. The same cellular architecture that provides mechanical strength also creates pathways for air flow and heat transfer. The cell walls and interstitial spaces act as both load-bearing elements and thermal management conduits, eliminating the need for separate structural and ventilation components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 enables high-performance braking with reduced caliper body dimensions, improved aeration, and enhanced heat dissipation, suitable for both sports and racing cars, while maintaining structural rigidity and reducing unsprung weight.

Implementation Method 1

allowing for radial airflow to dissipate heat

Methodology Applied
Scientific EffectRadial airflow: Convection

Implementation Method 2

apply a thrust action on a pad abutting it against the first braking surface of the disc

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 3

slidably supported by said bracket so as to move relatively to the bracket reaching an opposite pad to apply a braking action

Methodology Applied
Scientific EffectSliding friction: Friction

Data Source

PatentUS11904822B2Disc brake caliper body
Publication Date: 2024.02.20 FRENI BREMBO SPA
  • US11904822B2 patent drawing
  • US11904822B2 patent drawing
  • US11904822B2 patent drawing

AI summary

A caliper body having first and second braking surfaces, a bracket connecting to a caliper support provided in a vehicle and a floating element supported by the bracket to move along the axial direction. The floating element has a first floating element portion facing the first braking surface. The first floating element portion has a biasing device housing to accommodate a biasing device. The floating element has a first floating element bridge protruding straddling the brake disc and a plate-shaped portion extending on a plane along circumferential and radial directions. The plate-shaped portion has end portions protruding from opposite sides with respect to the first floating element bridge, a second inner plate-shape portion side facing the biasing device, two plate-shaped portion projections protruding from the plate-shaped portion side and having thrust surfaces biasing a second pad against the second braking surface and forming with the plate-shaped portion a ventilation channel.