Smart Key System Door Lock Control with Engine State Detection
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Solution Overview
Problem
Smart key systems for vehicles do not allow drivers to lock doors from outside the vehicle when the engine is still running, leaving vehicles vulnerable to theft and causing inconvenience.
Innovation Solution
A method for controlling a smart key system that enables door locking outside the vehicle when the engine is running, with two modes: one allowing door locking if the smart key is outside and the engine is off, and another mode that deactivates door locking if the smart key is inside or the engine is on, along with theft prevention features like engine shutdown and alert messaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door lock function is deactivated when the engine is running to prevent theft, then vehicle security is improved, but convenience of door locking is worsened
Solution Approach 1:
The door lock function is made dynamic by allowing it to be activated or deactivated based on real-time detection of the smart key's position relative to the vehicle. When the smart key is detected outside the vehicle, the door lock function can be activated even with the engine running, providing flexibility and convenience while maintaining security when the key is inside.
Solution Approach 2:
The system changes the operational parameter of the door lock function based on the detected state of the smart key. When the smart key is detected outside the vehicle, the system parameter changes to allow door locking with the engine running, whereas when the key is inside, the parameter reverts to deactivating the function for security reasons.
2Ease of operation
If the door lock function is activated outside the vehicle with the engine running, then convenience of door locking is improved, but vehicle theft risk is worsened
Solution Approach 1:
The smart key acts as an intermediary that mediates between the driver's intent to lock the door and the vehicle's security system. By detecting the smart key's position, the system uses this intermediary information to intelligently decide whether to allow door locking with the engine running, thus balancing convenience and security.
Solution Approach 2:
The system implements feedback by continuously monitoring the smart key's position and using this information to control the door lock function. When the smart key is detected outside the vehicle, the feedback loop enables door locking with the engine running, while when the key is inside, the feedback deactivates the function, thus adapting to the current state to prevent theft.
3Reliability
If warning sound is generated when smart key is deviated from vehicle, then theft prevention is improved, but passenger comfort is worsened
Solution Approach 1:
Instead of continuously generating warning sounds, the system applies partial action by generating warnings only under specific conditions - when the smart key is detected outside the vehicle and the engine is running. This selective warning approach provides theft prevention without causing unnecessary discomfort to passengers during normal operations.
Data Source
AI summary
The present disclosure relates to a method for controlling a smart key system for door lock of a vehicle configured with at least two modes, the method including selecting one of a first mode and a second mode, detecting an ON/OFF state of an engine of the vehicle and a key signal of a smart key, activating a door lock function performed outside of the vehicle, if it is confirmed through the key signal that the smart key is present outside of the vehicle, in case the first mode is selected, and deactivating a door lock function performed outside of the vehicle, if it is confirmed through the key signal that the smart key is present inside the vehicle or the engine is running, in case the second mode is selected.