Vehicle Controller Mode Switching for Stable Power-Saving Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic control devices in vehicles face challenges in transitioning to power-saving modes without interruptions caused by wake-up requests, particularly due to erroneous recognition of link-down states in communication networks.
Innovation Solution
An electronic control device with a controller configured to operate in multiple modes, including a first mode for communication processing, a second mode for transitioning after communication stoppage, a third mode for power-saving by stopping communication processing, and transitioning back to the first mode upon renewed communication except for wake-up requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the controller transitions to a power-saving mode after communication stoppage, then power consumption is reduced, but the system may be interrupted by wake-up requests due to erroneous link-down state recognition
Solution Approach 1:
The controller executes preliminary processing before transitioning to the power-saving mode, including stopping communication processing and setting a flag to prevent wake-up requests from causing unintended transitions back to the normal mode. This preliminary action ensures that the transition process completes without interruption even if wake-up requests are received during the transition period.
Solution Approach 2:
The system prepares for potential wake-up requests by implementing a protective mechanism that prevents these requests from causing unintended mode transitions. The flag setting and processing stoppage create a cushioning effect that absorbs the impact of erroneous wake-up requests during the critical transition period to power-saving mode.
2Loss of energy
If the controller stops communication processing in power-saving mode, then power consumption is optimized, but communication responsiveness may be delayed
Solution Approach 1:
The controller dynamically adjusts its operation mode based on communication activity. It transitions between normal mode (full communication processing) and power-saving mode (reduced communication processing) to optimize power consumption while maintaining communication capability when needed. The mode transition is triggered by communication stoppage detection, creating a dynamic adaptation to actual usage patterns.
3Speed
If the controller remains in normal mode to ensure immediate communication responsiveness, then communication speed is maintained, but power consumption increases
Solution Approach 1:
The controller periodically monitors communication activity and transitions between normal mode and power-saving mode based on detected communication patterns. When communication stops for a predetermined period, it transitions to power-saving mode. This periodic monitoring and mode switching allows the system to balance power consumption with communication responsiveness according to actual usage conditions.
Data Source
AI summary
An electronic control device includes a transceiver and a controller. The controller is configured to operate in one of multiple modes including a first mode, a second mode, and a third mode. The controller transitions from the first mode to the second mode in response to a stoppage of communication between the transceiver and a communication device during the controller operating in the first mode, and transitions from the second mode to the third mode in response to a predetermined period having passed without the communication in the second mode. The controller is configured to transition from the second mode to the first mode in response to an occurrence of the communication during the controller operating in the second mode except when the communication is a reception of a wake-up request that requests the controller to transition to the first mode.