Vehicle Power-Off Control for Neutral Parking Without Battery Drain
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Solution Overview
Problem
When a vehicle is parked in a tandem configuration, performing a power-off operation with the automatic park-range switching function disabled can lead to continued power supply to electrical components, resulting in battery drain over time.
Innovation Solution
A control device for vehicles that, when a power-off operation is performed while the automatic park-range switching function is disabled by a predetermined special operation, switches the power source off while setting the transmission to a neutral range and interrupting power supply to electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the automatic park-range switching function is disabled and power-off operation is performed, then the vehicle can be moved from neutral range, but power supply to electrical components is maintained causing battery drain
Solution Approach 1:
The system changes the power supply state parameter based on the automatic park-range switching function status. When the function is disabled, the system transitions to a power-off state that interrupts power to electrical components, preventing battery drain while maintaining vehicle movability through neutral range positioning.
2Duration of action of moving object
If the power source is turned off with accessory power source on, then electrical components remain powered, but this causes dead battery in long-term parking
Solution Approach 1:
The system performs a preliminary check of the automatic park-range switching function status before executing power-off operation. Based on this pre-assessment, it determines whether to interrupt power to electrical components, preventing battery drain before long-term parking occurs.
Solution Approach 2:
The power source control unit automatically adjusts power supply to electrical components based on the system state, without requiring manual intervention. When automatic park-range switching is disabled, the system self-manages power interruption to prevent battery drain during long-term parking.
3Adaptability or versatility
If neutral range is maintained with power-off operation, then vehicle is in movable state, but continued power supply consumes battery
Solution Approach 1:
The system dynamically changes the power supply parameter based on the automatic park-range switching function status. When the function is disabled, power supply to electrical components is interrupted while maintaining neutral range positioning, achieving energy savings without sacrificing parking flexibility.
Data Source
AI summary
An electronic control unit of a vehicle having an automatic park-range switching function for automatically turning off a power supply after switching to a P range when a power-off operation is performed, wherein when a power-off operation is performed in a state where the automatic park-range switching function is disabled by a predetermined special operation, the vehicle is turned off in a state where the vehicle is in a neutral range and the power supply is turned off in a state where power supply to the electrical components is interrupted. As a result, the vehicle is parked in a movable state, and battery exhaustion of the power supply is suppressed.