Vehicle ECU Wake-Up Masking for Abnormal Signal Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic control devices for vehicles may fail to enter a wake-up state due to continuous masking processes triggered by abnormal wake-up signals, leading to excessive power consumption and restricted functionality when the power supply is off.
Innovation Solution
An electronic control device that includes a masking process to prevent entering a wake-up state under abnormal conditions and a canceling process when the power supply turns on, ensuring efficient power usage by storing electric power in a battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the execution unit performs a masking process to prevent entering wake-up state under abnormal conditions, then the reliability of power management is improved, but the functionality of the electronic control device becomes excessively restricted
Solution Approach 1:
The masking state is made dynamic and temporary rather than permanent. The execution unit stores masking state information in a register and automatically cancels the masking when specific conditions are met (power supply state changes or wake-up signal received), allowing the system to adapt between security (masking) and functionality (unmasking) based on operational context
Solution Approach 2:
The system changes the parameter of wake-up signal reception based on power supply state. When power supply state is off, the terminal masks abnormal wake-up signals; when power supply state changes to on, the masking is canceled and normal wake-up signal reception is restored, thus resolving the contradiction between reliability and adaptability
2Loss of energy
If the execution unit continuously performs masking process, then the battery power consumption is reduced, but the electronic control device cannot respond to normal wake-up requests
Solution Approach 1:
The masking process is applied periodically or conditionally rather than continuously. The execution unit checks power supply state changes and wake-up signal conditions to determine when to apply or cancel masking, ensuring energy savings during off state while maintaining responsiveness during on state or when legitimate wake-up requests occur
3Ease of operation
If the terminal receives wake-up signal when power supply state is off, then the device can respond to external requests, but the battery power is depleted excessively
Solution Approach 1:
The terminal's wake-up signal reception capability is dynamically changed based on power supply state. When power supply state is off, the terminal masks wake-up signals to prevent excessive power consumption. When power supply state changes to on, the masking is canceled and normal reception is restored, resolving the contradiction between operational responsiveness and energy conservation
Data Source
AI summary
When the power supply state is in the off state and the input voltage is equal to or higher than the prescribed voltage, the electronic control device of the vehicle starts the mask processing when the reception of the wake-up signal by the terminal satisfies the abnormal condition. In the masking process, the execution device does not put the electronic control device in a wake-up state based on the wake-up signal. When the power supply state is turned on after the masking process, the execution device performs a cancellation process of canceling the masking process.