Vehicle Control Device Sleep Mode Transition via Voltage Thresholds
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Solution Overview
Problem
The existing systems for determining the startup or sleep mode of microprocessors in vehicles are complex, leading to slowed power saving effects due to dependency on multiple startup factors.
Innovation Solution
An electronic control device with a processing unit that shifts to sleep mode based on system power supply voltage thresholds, using a power supply monitoring unit to determine when to enter or exit sleep mode, allowing for rapid transitions regardless of startup factor statuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microcomputer determines startup or sleep mode based on multiple startup factors, then the control logic can be comprehensive, but the process becomes complicated and shifting to sleep mode is slowed down
Solution Approach 1:
The patent extracts the sleep mode determination logic from the complex multi-factor startup factor evaluation system. By creating a separate, dedicated determination unit that independently evaluates sleep conditions based on voltage thresholds and timing, the system separates the sleep control function from the overall startup factor processing, thereby simplifying the overall process while maintaining reliable control.
Solution Approach 2:
The patent segments the control process by dividing it into distinct functional units: one handling startup factors and another dedicated to sleep mode determination. This segmentation allows the sleep determination unit to operate independently with simplified logic, reducing overall process complexity while ensuring both functions are performed reliably.
2Reliability
If the microcomputer uses multiple startup factors to determine sleep mode, then the control can be thorough, but the time to shift to sleep mode increases
Solution Approach 1:
The determination unit continuously monitors system voltage and pre-evaluates sleep conditions in advance. By maintaining readiness to determine sleep mode at any time based on pre-collected voltage information and timing data, the system can rapidly transition to sleep mode when conditions are met, without needing to re-evaluate multiple startup factors at the moment of transition.
Solution Approach 2:
The patent extracts the sleep determination function into a separate unit that operates independently from the startup factor processing. This extracted unit can quickly assess sleep conditions using its dedicated evaluation criteria (voltage thresholds and timing) without being constrained by the more comprehensive startup factor analysis, thereby reducing the time to shift to sleep mode while maintaining reliable control.
3Measurement precision
If the system continuously monitors multiple startup factors, then the control precision can be maintained, but the power consumption increases
Solution Approach 1:
The patent implements dynamic monitoring where the determination unit actively evaluates sleep conditions when voltage changes are detected or at predetermined intervals, rather than continuously monitoring all startup factors. This dynamic approach maintains measurement precision for sleep determination while reducing overall power consumption by adjusting the monitoring intensity based on system state.
Solution Approach 2:
By extracting the sleep determination function into a separate unit with its own simplified monitoring strategy, the system can maintain precise sleep condition detection without requiring the full precision of continuous multi-factor monitoring. The extracted unit uses targeted voltage threshold comparisons and timing checks that consume less power than comprehensive startup factor analysis.
Data Source
AI summary
The present invention provides an electronic control device including a processing unit having a function of shifting to a sleep mode in which the processing unit is adapted to start up from the sleep mode according to occurrence statuses of one or more startup factors, and shift to the sleep mode according to a system power supply voltage.