Vehicle Drive Mode Switching for Slippery Geofencing Entrances
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Solution Overview
Problem
When switching from internal combustion engine drive to motor drive in geofencing zones, vehicles are prone to slipping due to slippery road surfaces, particularly in rainy conditions, which can lead to loss of traction and control.
Innovation Solution
A vehicle control system that includes a processor to assess road surface conditions and switch the drive mode to motor power at a position outside the geofencing zone where the likelihood of slipping is low, using road surface information such as rainfall and wiper operation data to determine safe switching points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive mode is switched from internal combustion engine to motor at the perimeter of geofencing zone, then the vehicle can enter the restricted zone compliant with emissions regulations, but the vehicle may slip on slippery road surfaces during the switching process
Solution Approach 1:
The system performs preliminary assessment of road surface conditions before the vehicle reaches the geofencing zone perimeter. When slippery conditions are detected, the control device提前 switches from internal combustion engine drive to motor drive at a position before the perimeter, rather than waiting until the vehicle is at the boundary. This preliminary switching action prevents the slip-prone condition from occurring during mode transition at the restricted zone entrance.
Solution Approach 2:
The system continuously monitors road surface conditions through sensors (detecting rainfall, wiper operation, road alignment) and uses this feedback information to dynamically adjust the drive mode switching decision. When the feedback indicates slippery road surfaces, the system modifies its normal switching behavior to avoid switching at the geofencing zone perimeter, thereby preventing vehicle slip while maintaining compliance with emissions regulations.
2Object-affected harmful factors
If drive mode switching is delayed to avoid slippery road surfaces, then vehicle slip probability is reduced, but the vehicle may travel a longer distance on internal combustion engine power before entering the restricted zone
Solution Approach 1:
The system performs preliminary assessment of road surface conditions before the vehicle reaches the geofencing zone perimeter. When slippery conditions are detected, the control device提前 switches from internal combustion engine drive to motor drive at a position before the perimeter, rather than waiting until the vehicle is at the boundary. This preliminary switching action prevents the slip-prone condition from occurring during mode transition at the restricted zone entrance.
Solution Approach 2:
The system changes the spatial parameter of the switching position based on road surface conditions. Under normal conditions, switching occurs at the geofencing zone perimeter. When slippery conditions are detected, the system dynamically adjusts the switching position parameter to a location before the perimeter where road conditions are safer, thereby optimizing both safety and travel efficiency.
Data Source
AI summary
A vehicle control device configured to control switching of drive mode of a vehicle including an internal combustion engine and a motor includes a processor configured to switch, in a case where a road surface of a perimeter of a geofencing zone is a road surface on which there is a high probability that the vehicle slips, in a movement route from an outside of the geofencing zone to an inside of the geofencing zone, the drive mode of the vehicle to drive by the motor in a state in which there is a low probability that the vehicle slips, outside the geofencing zone.