Brake Hydraulic Device Intermediate Wall Heat Dissipation

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Solution Overview

Problem

The intermediate wall part in brake hydraulic devices for vehicles experiences strength reduction due to heat buildup, which can compromise the housing's integrity during prolonged operation.

Innovation Solution

The formation of recessed or projecting portions on the intermediate wall part enhances heat dissipation and maintains strength by increasing the surface area, while the thickness is kept minimal, and the use of resin material allows for integral molding with the wall part.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the intermediate wall part is made thick to increase strength, then the strength increases, but the heat dissipation ability deteriorates

Engineering Contradiction:
Improvestrength of intermediate wall partVSAvoidheat dissipation ability
Core Design Contradiction:
StrengthVSTemperature

Solution Approach 1:

The patent transitions from changing wall thickness (one dimension) to adding surface features like ribs and protrusions (surface dimension). This allows heat dissipation enhancement through increased surface area without compromising structural strength, as the features are added to the surface rather than increasing overall thickness.

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

Solution Approach 2:

The patent applies local quality by adding heat dissipation features (ribs, protrusions) only to specific areas of the intermediate wall part that require enhanced heat dissipation. This allows differential treatment of different regions - areas needing strength maintain thickness while areas needing heat dissipation gain surface features.

Inventive Principle:
Principle #3Local quality

2Temperature

If the intermediate wall part is made thin to improve heat dissipation, then the heat dissipation ability improves, but the strength decreases

Engineering Contradiction:
Improveheat dissipation abilityVSAvoidstrength of intermediate wall part
Core Design Contradiction:
TemperatureVSStrength

Solution Approach 1:

Instead of increasing wall thickness to gain strength, the patent adds three-dimensional surface features (ribs, protrusions) that provide structural reinforcement through their geometry. This allows thin walls to achieve adequate strength while maintaining excellent heat dissipation capabilities.

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

Solution Approach 2:

The patent creates a composite structure by integrating heat dissipation features (ribs, protrusions) into the intermediate wall part. This composite design combines the functions of structural support and thermal management in a single integrated component, achieving both strength and heat dissipation simultaneously.

Inventive Principle:
Principle #40Composite materials

3Productivity

If the housing operates continuously, then the productivity increases, but the temperature of the coil increases causing strength decrease

Engineering Contradiction:
Improvecontinuous operation capabilityVSAvoidcoil temperature
Core Design Contradiction:
ProductivityVSTemperature

Solution Approach 1:

The patent converts the harmful heat generated by continuous coil operation into a beneficial effect by designing heat dissipation features that actively utilize this heat flow. The ribs and protrusions create controlled thermal pathways that manage heat distribution, preventing localized overheating while enabling continuous operation.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The intermediate wall part with its heat dissipation features acts as a thermal intermediary between the coil and the external environment. It provides controlled thermal management, transferring heat from the coil in a managed manner that prevents temperature buildup while enabling continuous operation.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 configuration effectively prevents strength decrease in the housing due to heat and ensures stable operation by improving heat dissipation and structural integrity.

Implementation Method 1

the ability to dissipate heat of the intermediate wall part can be enhanced because the surface area of the peripheral wall part becomes large since at least one of the recessed portion and the projecting portion is formed on the intermediate wall part

Methodology Applied
Scientific EffectHeat dissipation: Convection

Data Source

PatentEP2832598B1Brake hydraulic device for vehicle
Publication Date: 2019.01.09 AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
  • EP2832598B1 patent drawingFigure 1
  • EP2832598B1 patent drawingFigure 2A~2B
  • EP2832598B1 patent drawingFigure 3

AI summary

Provided is a brake hydraulic device for a vehicle, including: a base body having a hydraulic pressure path for brake fluid formed therein; an electromagnetic valve which opens and closes the hydraulic pressure path; an electromagnetic coil which drives the electromagnetic valve; and a housing (20) attached to the outer surface of the base body and having a housing chamber for accommodating the electromagnetic valve and the electromagnetic coil. The housing (20) includes a peripheral wall part (30) having openings formed on a front side and a rear side thereof, and an intermediate wall part (40) partitioning a space inside the peripheral wall part (30) into a front side and a rear side. The housing chamber is provided on the rear side of the intermediate wall part (40), and recessed portions (46, 48) and a projecting portion (47) is formed on a front surface (40a) of the intermediate wall part (40). On this configuration, deformation of the housing caused by heat can be prevented.