Dark Wire Harness Exterior with Heat Reflection
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Solution Overview
Problem
High-tension wire harnesses in vehicles face issues with heat accumulation and inefficient heat transfer and radiation, leading to increased temperatures of the electric wires.
Innovation Solution
A wire harness with a molded resin exterior member of black or dark color, featuring a tubular shape and heat reflecting portions, which can efficiently absorb and radiate heat, and includes identification markings for the conductive paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the exterior member is made of light color material, then heat radiation efficiency is improved, but heat absorption from the conductive path is reduced
Solution Approach 1:
The exterior member is designed with different surface properties at different locations: the inner surface facing the conductive path has heat-absorbing characteristics (dark color), while the outer surface has heat-radiating characteristics (light color). This local differentiation allows the same component to perform both heat absorption and heat radiation functions simultaneously, resolving the contradiction between these two opposing requirements.
2Use of energy by moving object
If the exterior member is made of black or dark color resin, then heat absorption from conductive path is improved, but heat radiation efficiency deteriorates
Solution Approach 1:
The exterior member is designed with different surface properties at different locations: the inner surface facing the conductive path has heat-absorbing characteristics (dark color), while the outer surface has heat-radiating characteristics (light color). This local differentiation allows the same component to perform both heat absorption and heat radiation functions simultaneously, resolving the contradiction between these two opposing requirements.
3Temperature
If heat is not efficiently transferred to the exterior member, then temperature increase of conductive path is reduced, but heat management effectiveness deteriorates
Solution Approach 1:
The exterior member is designed with different surface properties at different locations: the inner surface facing the conductive path has heat-absorbing characteristics (dark color), while the outer surface has heat-radiating characteristics (light color). This local differentiation allows the same component to perform both heat absorption and heat radiation functions simultaneously, resolving the contradiction between these two opposing requirements.
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 reduces thermal impact on high-tension conductive paths by efficiently absorbing and radiating heat, ensuring better temperature management and protection of the wire harness.
Implementation Method 1
the exterior member can more efficiently absorb heat originating from the conductive path
Implementation Method 2
the exterior member can more efficiently radiate the heat to the outside
Implementation Method 3
the heat reflecting portion can reflect heat from outside
Data Source
AI summary
A wire harness includes at least one conductive path, and an exterior member that accommodates and protects the conductive path. The exterior member is a molded resin component made of a resin material which has a black color or a dark color close to the black color.