Zone ECU Blinker Synchronization in Centralized Vehicle Control
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Solution Overview
Problem
In vehicle automation systems, integrating the arithmetic processing function and the control function of actuators into a central processing unit poses challenges in synchronizing the control of actuators distributed throughout the vehicle, leading to potential deviations in lighting and buzzer timings.
Innovation Solution
A vehicle control system is implemented, featuring multiple zone ECUs distributed across the vehicle, connected via a time synchronization network to a central processing unit. Each zone ECU adjusts its blinking timing signal based on shared information from other zone ECUs via a local network, ensuring synchronized control of actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control function of actuators is integrated into a central processing unit, then the system complexity is reduced and management is simplified, but the synchronization of distributed actuators becomes difficult to maintain
Solution Approach 1:
The patent segments the control system into a central processing unit and multiple zone ECUs distributed throughout the vehicle. Each zone ECU is responsible for controlling actuators in its specific zone, allowing localized control while maintaining overall system management through the central unit. This segmentation resolves the contradiction by distributing control functions to maintain synchronization reliability while keeping system management simplified through hierarchical architecture.
Solution Approach 2:
The patent introduces zone ECUs as intermediary devices between the central processing unit and distributed actuators. These zone ECUs receive control signals from the central unit and locally manage actuator synchronization within their zones. This intermediary layer resolves the synchronization difficulty by providing localized timing adjustment and signal distribution without requiring direct complex wiring between the central unit and each actuator.
2Measurement precision
If signal lines are directly connected from the central processing unit to each actuator, then control precision is improved, but the number of signal lines increases significantly
Solution Approach 1:
The patent segments the signal distribution system into hierarchical levels: the central processing unit sends control signals to multiple zone ECUs, which then distribute signals to actuators within their respective zones. This segmentation dramatically reduces the total number of signal lines required while maintaining control precision through the use of time-synchronization networks that ensure accurate signal transmission at each hierarchical level.
Solution Approach 2:
The patent transitions from a flat, direct connection architecture to a hierarchical, multi-dimensional control architecture. By organizing control signals through intermediate zone ECUs arranged in zones throughout the vehicle, the system reduces wiring complexity while maintaining control precision through structured signal distribution paths and time-synchronization protocols.
3Adaptability or versatility
If different signal paths are used from the central processing unit to distributed actuators, then system flexibility is improved, but control synchronization becomes difficult to achieve
Solution Approach 1:
The patent introduces zone ECUs as intermediary devices that receive control signals from the central processing unit and locally manage synchronization of actuators within their zones. These intermediaries use time-synchronization networks to coordinate timing across different signal paths, resolving the synchronization difficulty while maintaining the flexibility of using multiple communication protocols and path types (time-synchronization network, time-asynchronous network, local network) throughout the system.
Data Source
AI summary
A vehicle control system includes a plurality of zone ECUs and a central processing unit. Each zone ECU outputs a blinking timing signal for blinking a blinker installed in a vehicle on the basis of a blinking control signal received from the central processing unit. Furthermore, the zone ECUs are configured to be connected to each other via a local network, share blinking timing information of the blinker with another zone ECU via the local network, and adjust a blinking timing signal of the zone ECUs on the basis of the shared information.