Vehicle Composite Cable Assembly With EMC Shielded Power and Communication
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Solution Overview
Problem
Existing vehicle cables face challenges in providing simultaneous communication and power functions to electronic parking brakes (EPB) and anti-lock brake systems (ABS) while ensuring adequate electromagnetic compatibility (EMC) shielding to prevent interference and malfunctions.
Innovation Solution
A composite cable assembly is designed to integrate communication and power functions into a single cable, featuring a communication unit with shielding and a power unit, both covered by a cable shielding layer and jacket, to enhance EMC performance and stability within limited vehicle spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a communication cable and a power cable are integrated into a single composite cable, then installation convenience and space utilization are improved, but electromagnetic interference between the communication unit and power unit increases
Solution Approach 1:
The composite cable is divided into separate communication unit and power unit, each with their own shielding layers. The communication unit has a communication shielding layer covering the communication lines, while the power unit has a power shielding layer covering the power lines. This segmentation allows independent shielding of each unit to prevent electromagnetic interference while maintaining integration benefits.
Solution Approach 2:
Shielding layers act as intermediary elements between the communication lines and power lines. The communication shielding layer and power shielding layer serve as mediators that block electromagnetic fields, preventing direct interference between the communication unit and power unit while allowing both units to coexist in the same cable.
2Reliability
If shielding layers are added to the composite cable, then electromagnetic compatibility is improved, but cable complexity and manufacturing difficulty increase
Solution Approach 1:
The shielding structure is segmented into distinct communication shielding layer and power shielding layer, each applied to their respective units. This modular shielding approach simplifies manufacturing compared to a single complex shielding system, as each shielding layer can be independently applied and controlled.
Solution Approach 2:
The communication shielding layer is nested within the communication unit, and the power shielding layer is nested within the power unit. These nested shielding structures are then integrated into the composite cable with a common outer jacket, creating a hierarchical shielding system that is easier to manufacture than a single-layer complex shield.
3Area of stationary object
If the communication unit and power unit are placed close together in limited vehicle space, then space utilization is improved, but mutual electromagnetic influence increases
Solution Approach 1:
The communication shielding layer and power shielding layer serve as intermediary barriers between the communication unit and power unit. These shielding layers block electromagnetic fields, allowing the units to be placed close together in limited vehicle space without significant mutual interference.
Solution Approach 2:
The shielding protection is applied locally to each unit (communication shielding layer for communication lines, power shielding layer for power lines) rather than requiring a uniform shielding approach throughout the entire cable. This localized shielding enables efficient space utilization while maintaining electromagnetic compatibility.
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 composite cable assembly effectively provides simultaneous communication and power to EPB and ABS systems, significantly reducing electromagnetic interference and improving reliability, while also enhancing flexibility and bending resistance for stable connections within vehicles.
Implementation Method 1
a communication unit shielding layer covering the pair of communication lines to shield the pair of communication lines
Implementation Method 2
a cable shielding layer covering the communication unit and the power unit together to shield the communication unit and the power unit
Data Source
AI summary
The present disclosure relates to a composite cable for a vehicle and a composite cable assembly, which are capable of simultaneously providing a communication function and power to an electronic parking brake (EPB) and an anti-lock brake system (ABS) for use in a vehicle, and maximizing electromagnetic compatibility (EMC) shielding performance between internal components or external cables.