On-Vehicle Network Wiring With Redundant Power Over Data Lines
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Solution Overview
Problem
The existing on-vehicle network systems face challenges in achieving redundancy with a simpler structure and efficient wiring use, particularly in autonomous driving systems where high-speed data communication is required, leading to increased weight and complexity due to the need for multiple power and data wiring networks.
Innovation Solution
The solution involves superimposing redundant power on data wiring between electronic control devices, allowing power to be transmitted from one power supply device to another via data wiring, reducing the number of physical power supply wires needed while maintaining system redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power supply wirings and data wirings are used for each electronic control device, then system reliability is improved through redundancy, but device complexity and wiring weight increase
Solution Approach 1:
The patent combines power supply wiring and data wiring into a single integrated cable bundle that connects electronic control devices. The power supply line and data line are merged into one physical infrastructure, reducing the number of separate wiring harnesses while maintaining functional separation through signal isolation techniques.
Solution Approach 2:
The integrated wiring structure serves multiple functions simultaneously: it provides both power supply and data communication between electronic control devices. This multi-functional wiring reduces overall system complexity by eliminating the need for separate dedicated power and data wiring harnesses.
2Reliability
If separate power supply wirings and data wirings are used for each electronic control device, then system reliability is improved through redundancy, but the weight of the wire harness increases
Solution Approach 1:
The patent combines power supply wirings and data wirings into a single integrated cable bundle that connects electronic control devices. The power supply line and data line are merged into one physical infrastructure, reducing the number of separate wiring harnesses while maintaining functional separation through signal isolation techniques.
3Reliability
If redundant power supply systems are constructed with separate power storage units and power supply wirings, then system reliability is improved, but the number of components and wiring complexity increase
Solution Approach 1:
The patent combines power supply wirings and data wirings into a single integrated cable bundle that connects electronic control devices. The power supply line and data line are merged into one physical infrastructure, reducing the number of separate wiring harnesses while maintaining functional separation through signal isolation techniques.
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 approach enables a more reliable and efficient power supply redundancy with fewer wirings, reducing the weight of the wire harness and improving the reliability of the on-vehicle network system, especially in high-speed data communication applications like autonomous driving.
Implementation Method 1
a data wiring connection unit that superimposes power on data transmitted and received between the electronic control devices
Data Source
AI summary
As the level of autonomous driving of an automobile is improved, traveling in a system without a driver is required, and high reliability of the system is essential. One method for achieving high reliability is redundancy of a power supply. To construct a redundant power supply network, a redundant power supply network is required in addition to a main power supply network, and the number of wires of the network increases. In addition, since a cable having a thick core wire is used as a power supply wiring in order to handle a large current, the weight of the cable becomes heavy, which leads to fuel consumption degradation of the vehicle. An electronic control device 11-B receives power fed from a power storage unit 12-A via another electronic control device 11-A, as a redundant power supply redundant to a power superimposition data wiring 16. That is, the electronic control device 11-B receives power fed or transmitted from both the directly-connected power storage unit 12-B and the indirectly-connected power storage unit 12-A.