Flat Routing Member for Vehicle Wiring Harness Noise Reduction
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Solution Overview
Problem
The complexity and weight of vehicle wire harnesses due to numerous electrical wires for power supply and increasing electromagnetic noise issues, particularly in automated driving systems, necessitate a simplified configuration that reduces noise interference and component count.
Innovation Solution
A vehicle circuit body featuring a flat routing member with a strip-shaped conductor for the main power supply line, accompanied by a shielding member and parallel ground wires to block electromagnetic noise, allowing for a reduced number of wires and components, and using sheet members to manage and route electrical wires effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If numerous electrical wires are used for power supply to meet increasing electronic component requirements, then power supply capability is improved, but wire harness complexity and weight increase
Solution Approach 1:
Multiple electrical wires for power supply are merged into a single flat routing member with a strip-shaped conductor. This consolidation maintains the required power supply capability while significantly reducing the number of individual wires and overall harness complexity.
Solution Approach 2:
The flat routing member uses a composite structure combining a strip-shaped conductor with insulating and protective layers. This composite design enables high power transmission capacity in a single integrated component, replacing multiple separate wires.
2Power
If numerous electrical wires are bundled together for power supply, then power supply capability is improved, but weight of the wire harness increases
Solution Approach 1:
Multiple heavy electrical wires are combined into a single flat routing member with a strip-shaped conductor. This merging reduces the total weight while maintaining the cumulative power supply capability of all original wires.
3Ease of manufacture
If traditional wire routing without shielding is used, then manufacturing simplicity is maintained, but electromagnetic noise interference increases
Solution Approach 1:
A shielding member is introduced as an intermediary component between the flat routing member and surrounding environment. This shielding layer blocks electromagnetic noise while the overall structure remains simple and easy to manufacture as a integrated assembly.
4Reliability
If large protectors are used to house the main line, then protection capability is improved, but device size and cost increase
Solution Approach 1:
The protective function is merged directly into the flat routing member through integrated insulating and protective layers. This eliminates the need for separate large protectors, reducing overall device size while maintaining protection capability.
Solution Approach 2:
The flat routing member incorporates thin film-like insulating and protective layers that provide adequate protection without requiring bulky external protectors. These layered structures offer sufficient reliability in a compact form.
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 simplifies the main line structure, reduces weight and noise interference, and eliminates the need for large protectors and additional noise countermeasures, thereby lowering costs and improving manufacturing efficiency.
Implementation Method 1
a shielding member that blocks noises from the flat routing member for power supply and is disposed between the flat routing member and the electrical wire bundle
Implementation Method 2
a flat routing member that forms a main line of a vehicle circuit body... the flat routing member for power supply, which electrically connects electronic components and a power supply
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A vehicle circuit body (1) includes a flat routing member (20) that forms a main line of the vehicle circuit body (1), and an electrical wire bundle (10) that includes a plurality of electrical wires (11, 12) in a prescribed routing shape (99), in which a part of the electrical wire bundle (10) which forms the main line is routed on the flat routing member (20).