ECU Wakeup Mode Switching for Lower Power Consumption
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Solution Overview
Problem
The evaporative emission leak diagnosis in vehicles requires significant power consumption, and existing methods using a soak timer to manage starting factors may not adequately support changes in operation modes, potentially leading to insufficient resource allocation for different modes.
Innovation Solution
An electronic control unit with a microcomputer that identifies starting factors during initialization and selects appropriate operation modes, allowing for dynamic switching between modes based on changing factors to optimize resource allocation and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the microcomputer is shut down or placed in sleep mode to reduce power consumption, then power consumption is reduced, but the ability to respond to multiple starting factors and switch operation modes is impaired
Solution Approach 1:
The microcomputer dynamically adjusts its operational state based on starting factors. It can be in sleep mode during evaporative emission leak diagnosis to save power, but can be quickly activated when another starting factor occurs (e.g., ignition switch turned on). The system monitors starting factors and transitions between sleep mode and active mode as needed, making the power consumption and responsiveness adaptable to current operational requirements.
2Use of energy by moving object
If a resource is selected based on a starting factor to execute an operation mode, then power consumption is reduced, but the resource may become insufficient when another starting factor occurs during execution
Solution Approach 1:
The system continuously monitors starting factors during operation mode execution. When another starting factor occurs (e.g., ignition switch turned on during evaporative emission leak diagnosis), the system detects this change and responds by switching to the appropriate operation mode. This feedback mechanism ensures that resource allocation always matches current operational requirements, maintaining reliability while optimizing power consumption.
Data Source
AI summary
An electronic control unit includes a microcomputer configured to be started by a plurality of starting factors, in which different operation modes are associated with each of the starting factors, and a resource is associated with each of the operation modes. The microcomputer identifies a starting factor in an initialization process started by the starting factor, and selects and executes an operation mode associated with the starting factor identified. When another starting factor is generated during execution of the operation mode, the microcomputer stops execution of the operation mode and restarts, and then executes an operation mode associated with the other starting factor.