Vehicle Air Recirculation Control for Parking Lot Entry Detection
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Solution Overview
Problem
Current vehicle air conditioning systems lack the ability to automatically adjust based on the vehicle's location without driver or passenger input, particularly in determining when the vehicle has entered a parking lot.
Innovation Solution
A device and method utilizing a Global Navigation Satellite System (GNSS) to determine the vehicle's location, combined with a map of road links and altitude changes, to control the air conditioner to internal mode when the vehicle is deemed to be in a parking lot, with set values adjusted based on surrounding environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the air conditioner is manually controlled based on driver or passenger input, then the system can adapt to user preferences, but the convenience and automation level is reduced
Solution Approach 1:
The air conditioning system automatically detects vehicle location using GNSS signals and map data, and autonomously switches between external and internal air circulation modes without requiring driver or passenger input. The controller independently makes control decisions based on whether the vehicle is detected to be in a parking lot or on a road.
Solution Approach 2:
The system changes the air circulation mode parameter automatically based on location parameters. When the vehicle enters a parking lot (detected through GNSS signal loss and altitude changes), the system switches from external air circulation mode to internal air circulation mode, and vice versa when exiting the parking lot.
2Device complexity
If the vehicle location is determined using GNSS signals only, then the system is simple to implement, but the accuracy of detecting parking lot entry is insufficient
Solution Approach 1:
The system combines multiple detection methods including GNSS signal reception status, altitude changes from barometric pressure sensors, and map data matching to determine vehicle location and parking lot entry. This multi-parameter approach improves detection accuracy while maintaining reasonable system complexity.
Solution Approach 2:
The system uses map data as an intermediary to interpret GNSS location information. By comparing real-time GNSS coordinates with stored map data including road links and parking lot boundaries, the system can accurately determine whether the vehicle has entered a parking lot, even when GNSS signals are temporarily blocked.
3Object-affected harmful factors
If the air conditioner switches to internal mode automatically in parking lots, then the comfort level improves, but the energy consumption increases due to continuous operation
Solution Approach 1:
The system continuously monitors vehicle location through GNSS signals and altitude sensors, providing feedback to the controller. When the vehicle exits the parking lot (detected through GNSS signal restoration or altitude changes), the system automatically switches back to external air circulation mode, preventing unnecessary continuous operation and reducing energy consumption.
Solution Approach 2:
The air circulation mode is dynamically adjusted based on real-time vehicle location rather than remaining static. The system transitions between external and internal modes as the vehicle enters and exits parking lots, optimizing both comfort and energy efficiency by matching the operating mode to the actual environmental conditions.
Data Source
AI summary
A device configured for controlling a vehicle includes a navigation for receiving a Global Navigation Satellite system (GNSS) signal to determine at least one location of the vehicle, storage for storing a map including a plurality of road links, and a controller that determines whether the vehicle has entered a parking lot based on a result of determining whether a first location of the vehicle is connected to the road link based on the map and a result of determining whether a road link connected to a second location of the vehicle immediately before the first location among the plurality of links is connected to a parking lot entry/exit point, and controls an air conditioner in an internal air mode when it is determined that the vehicle has entered the parking lot, providing a pleasant environment to a driver and a passenger.