Master ECU Programming for Faster Vehicle Assembly
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Solution Overview
Problem
The management of programs for electronic control units (ECUs) in vehicle manufacturing is time-consuming, requiring compatibility checks and updates, which hinders manufacturing efficiency and increases carbon dioxide emissions.
Innovation Solution
A vehicle manufacturing method involving the placement of a vehicle control unit and a master control unit with a non-volatile program storage unit, where the master control unit connects with multiple vehicle control units via communication wires and writes programs directly to them, simplifying the process and reducing the need for individual checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If program compatibility checks and updates are performed for each ECU in the manufacturing process, then program management reliability is improved, but manufacturing time increases and productivity decreases
Solution Approach 1:
The master control unit performs program compatibility checks and updates in advance before the ECUs are installed in the vehicle. By completing the program management process during ECU assembly rather than during vehicle manufacturing, the patent eliminates time-consuming checks and updates from the production line, thereby improving manufacturing efficiency while ensuring program compatibility through preliminary verification
Solution Approach 2:
The patent introduces a master control unit as an intermediary device that manages multiple ECUs. This master control unit centralizes the program management function, allowing it to write and verify programs for multiple ECUs sequentially or in parallel, thereby reducing the overall time required compared to individual manual management of each ECU
2Manufacturing precision
If program compatibility checks and updates are performed for each ECU, then program version accuracy is improved, but work time period increases
Solution Approach 1:
The master control unit performs program compatibility checks and version verification in advance during ECU assembly. This preliminary action ensures program version accuracy is confirmed before installation, eliminating the need for time-consuming checks during vehicle manufacturing while maintaining high precision in program management
Solution Approach 2:
The patent merges the program management functions (writing, compatibility checking, and version verification) into a single integrated process performed by the master control unit. This consolidation allows multiple verification steps to be executed in a streamlined manner, reducing total work time while maintaining program version accuracy
3Manufacturing precision
If individual program writing is performed for each vehicle control unit, then program management precision is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The master control unit serves as an intermediary that automates the program writing process for multiple ECUs. It sequentially or in parallel writes programs to each ECU through communication wires, eliminating the need for manual individual programming operations. This automation maintains program management precision while significantly reducing operation difficulty
Solution Approach 2:
The master control unit is designed with universal functionality to manage multiple different types of ECUs. It can write programs to various vehicle control units through standardized communication protocols, thereby simplifying the operation process while maintaining precision across different ECU types without requiring separate manual procedures for each
Data Source
AI summary
A vehicle manufacturing method includes a placement step of placing, in a vehicle, a vehicle control unit and a master control unit, the vehicle control unit including a non-volatile program storage unit and controlling a function unit installed in the vehicle by executing a program stored in the program storage unit, a wire-connection step of connecting the master control unit with plural vehicle control units by a communication wire, and a writing step of executing a writing process of writing the program to the program storage unit for the vehicle control unit which is connected with the master control unit by the communication wire.