Vehicle Immobilizer Control via Keyless App Authorization
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Solution Overview
Problem
Existing vehicle driving authorization systems lack adequate protection against unauthorized use and theft, particularly when keys are left in the vehicle for car-sharing purposes, as they do not effectively integrate keyless access systems with immobilizers to prevent unauthorized starting and movement.
Innovation Solution
A driving authorization system that combines a connectivity unit with a keyless access authorization system and an immobilizer, where the immobilizer is activated only through an application, ensuring it remains deactivated unless the vehicle is unlocked via the application, preventing unauthorized use by integrating with a backend server for authorization checks and secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a keyless access authorization system is used for car-sharing, then ease of operation is improved, but security against unauthorized use deteriorates
Solution Approach 1:
The patent combines the keyless access authorization system with an immobilizer system into a single integrated driving authorization system. The control unit coordinates both the access lock and immobilizer functions, ensuring that unauthorized users cannot merely access the vehicle but also cannot start or move it, thereby resolving the security weakness of standalone keyless systems
Solution Approach 2:
The control unit acts as an intermediary between the keyless access system and the immobilizer system. It receives authorization status from the keyless system and conditionally controls the immobilizer accordingly, creating a layered security approach where the intermediary ensures that both access and starting authorization must be validated
2Ease of operation
If the access lock is deactivated to allow vehicle entry, then ease of operation is improved, but security against unauthorized starting deteriorates
Solution Approach 1:
The system performs preliminary authorization checking for both access lock and immobilizer control before allowing vehicle operation. The control unit verifies authorization status in advance and only deactivates the immobilizer when proper authorization is confirmed, preventing the scenario where access is granted but starting remains blocked
Solution Approach 2:
The patent merges the control of access lock and immobilizer into a single coordinated system. When the access lock is deactivated for authorized users, the immobilizer is simultaneously and conditionally deactivated, ensuring seamless operation without requiring separate authorization steps, thereby maintaining both ease of operation and security
Data Source
AI summary
A driving authorization system for a vehicle includes a connectivity unit for communication at least with a key and a keyless access authorization system. A server has an access lock, which can be activated or deactivated by the key and/or the keyless access authorization system. The keyless access authorization system is an application on a mobile device, further having an immobilizer. The immobilizer is designed in such a way that it is activated when the access lock is activated by the application and is deactivated again in this case only when the access lock is deactivated by the application.