Noise Eliminating Wire Harness with Direct Capacitor Connection
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Solution Overview
Problem
Conventional wire harnesses with capacitor connection circuits extending side by side suffer from incomplete noise elimination due to noise propagation by induction, necessitating a reconsideration of the entire wire harness structure to enhance noise elimination performance.
Innovation Solution
A noise eliminating wire harness design where a capacitor is directly connected to a conductor connection portion at an intermediate portion of the wire, eliminating the need for branch wires and reducing noise propagation by induction, with the capacitor connected via a terminal using methods like soldering or press-clamping, and positioned near the load to enhance noise elimination performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitor connection circuits are extended side by side from the main wire, then the capacitor can be connected to eliminate noise, but noise propagates to the downstream side by induction and noise elimination becomes incomplete
Solution Approach 1:
The patent extracts the capacitor connection from the conventional side-by-side wire extension and repositions it to connect directly to the main wire at an intermediate portion. This extraction eliminates the parallel wire configuration that causes inductive coupling and noise propagation, while maintaining the capacitor's noise elimination function.
Solution Approach 2:
The patent introduces a conductor connection portion at an intermediate portion of the main wire as an intermediary connection point. This intermediary structure allows the capacitor to be connected directly to the main wire without requiring side-by-side extension, thereby preventing inductive noise propagation while ensuring effective noise elimination.
2Adaptability or versatility
If capacitor connection circuits are extended away from the main wire path, then connection flexibility is improved, but the structure becomes more complex and space is wasted
Solution Approach 1:
The patent merges the capacitor connection directly into the main wire path by connecting at an intermediate portion. This integration eliminates the need for separate extended connection circuits, reducing structural complexity and space requirements while maintaining connection flexibility through the direct attachment point.
3Shape
If branch wires are used to connect the capacitor, then the capacitor can be positioned independently, but noise propagation by induction increases and attenuation characteristics worsen
Solution Approach 1:
The patent extracts the capacitor connection from the branch wire configuration and connects it directly to the main wire. This extraction eliminates the inductive coupling pathway that branch wires create, thereby improving noise attenuation characteristics while still allowing the capacitor to be positioned independently at the desired location.
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 significantly enhances noise elimination performance by eliminating noise propagation through induction and achieving better attenuation characteristics, particularly effective when a car radio antenna is present, reducing the need for external fixing members and optimizing space usage.
Implementation Method 1
a capacitor (39) for eliminating noise which is connected to the ground
Implementation Method 2
there is a fear that the noise is propagated to the downstream side by induction
Data Source
AI summary
There is provided a noise eliminating wire harness capable of enhancing a noise elimination performance. In the wire harness 31, an intermediate portion of a sheath 34 of a wire 33 is removed to expose a conductor 35, thereby forming a conductor connection portion 36, and a capacitor 39 is directly connected to this conductor connection portion 36. The capacitor 39 is directly connected to the conductor connection portion 36 without using any wire serving as a branch wire. The capacitor 39 is connected to the conductor connection portion 36 in perpendicularly intersecting relation thereto. The capacitor 39 is connected to the wire 33 in such a condition that there is not provided any portion extending side by side with the wire 33.