Loop Circuit Body for Vehicle with Integrated Trunk Harness
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Solution Overview
Problem
The increasing complexity of vehicle electrical systems leads to a rise in the number of electric wires, size, and weight of circuit bodies, complicating manufacturing and increasing costs due to the need for multiple connections and components like junction boxes.
Innovation Solution
A circuit body with a simplified structure featuring a loop configuration of control boxes connected via trunk and branch line harnesses, where the trunk line harness integrates power and communication lines, and branch line harnesses connect control boxes to electrical components, reducing the need for separate power and communication lines and eliminating the requirement for junction boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of electrical components and control systems is increased to meet growing vehicle functionality requirements, then the functional capability of the circuit body is improved, but the number of electric wires, size, and weight of the circuit body increases
Solution Approach 1:
The patent combines multiple functions (power distribution, signal transmission, control) into integrated control boxes that serve multiple purposes. The trunk line harness integrates both power lines and communication lines into a single structured system, reducing the overall number of separate wires and components needed, thereby reducing weight while maintaining enhanced functionality.
Solution Approach 2:
The control boxes are designed to perform multiple functions simultaneously - distributing power to multiple systems, controlling power supply/cutoff, protecting against excessive current, and managing communication signals. This multi-functionality reduces the need for separate dedicated components for each function, reducing overall circuit body weight.
2Adaptability or versatility
If the number of electrical components and control systems is increased to meet growing vehicle functionality requirements, then the functional capability of the circuit body is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The circuit body is segmented into modular control boxes that can be independently designed, manufactured, and assembled. Each control box handles specific functions, and the trunk line harness provides a standardized connection structure. This segmentation reduces overall system complexity by breaking down the complex integrated system into manageable modular units.
Solution Approach 2:
Multiple functions are merged into the control boxes and the trunk line harness structure, reducing the number of separate components needed. The integrated design consolidates power distribution, signal transmission, and control functions into a unified system architecture, simplifying the overall device structure.
3Reliability
If separate power lines and communication lines are used to ensure reliable and independent transmission, then the reliability of signal and power transmission is improved, but the number of electric wires and device complexity increase
Solution Approach 1:
The trunk line harness merges power lines and communication lines into a single integrated structure that maintains independent transmission paths within the same harness. This consolidation reduces the number of separate wire bundles and connection points while preserving the reliability of independent signal and power transmission through proper internal routing and shielding.
4Adaptability or versatility
If traditional junction boxes and separate connection components are used to distribute power and control signals, then the distribution functionality is improved, but the manufacturing cost and manufacturing time increase
Solution Approach 1:
The control boxes and trunk line harness integrate the functions previously performed by separate junction boxes and connection components into a unified modular system. This integration reduces the total number of parts that need to be manufactured and assembled, thereby reducing manufacturing time and cost while maintaining full distribution functionality.
Solution Approach 2:
The system is segmented into standardized modular control boxes that can be manufactured independently and assembled in different configurations to meet different vehicle requirements. This modularity streamlines the manufacturing process by allowing parallel production of standard modules and reducing assembly complexity.
Data Source
AI summary
A circuit body for a vehicle is wired on a vehicle body of the vehicle for performing supply of electric power to an electrical component and communication of various communication signals with the electrical component. The circuit body includes: a plurality of control boxes separately disposed on the circuit body and capable of controlling input and output of at least one of the electric power and the communication signal; a trunk line harness connecting one of the plurality of control boxes and another of the plurality of control boxes; and a branch line harness connecting the control box and the electrical component. The circuit body has a loop structure in which at least part of the plurality of control boxes are annularly connected via the trunk line harness.