Smart Entry System ID Verification Disablement Control
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Solution Overview
Problem
The existing smart entry systems for vehicles face issues where the ID verification of a portable device is disabled when left inside, preventing authorized passengers from starting the engine and potentially allowing unauthorized individuals to steal the vehicle, while also risking unauthorized engine starts if the disablement is cancelled.
Innovation Solution
A smart entry system with a disablement control device that prohibits or cancels the ID verification disablement when a passenger is detected inside the vehicle, using specified operations and alarms to ensure only authorized individuals can start the engine, and associates transponder IDs with portable device IDs for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ID verification is disabled when the portable device is left inside the vehicle, then the security against unauthorized engine starts is improved, but the utility deteriorates because authorized passengers cannot use the portable device to start the engine
Solution Approach 1:
The system dynamically adjusts the ID verification state based on real-time detection of passenger presence. When a passenger is detected inside the vehicle, the system maintains ID verification enabled, allowing engine starts. When no passenger is detected and the portable device is left inside, the system disables ID verification to prevent unauthorized starts. This dynamic adaptation resolves the contradiction between security and utility.
Solution Approach 2:
The system uses feedback from passenger detection mechanisms (such as sensors detecting presence inside the vehicle) to determine whether to enable or disable ID verification. This feedback loop allows the system to automatically adjust its security state based on actual usage conditions, ensuring both security when devices are left inside and utility when passengers are present.
2Reliability
If the ID code is always disabled when the portable device is left in the vehicle, then the security against theft is improved, but the utility deteriorates because any passenger present in the vehicle cannot use the portable device
Solution Approach 1:
The system dynamically switches between two operational states: when a passenger is detected inside the vehicle, ID verification remains enabled for normal operation; when no passenger is detected (indicating the device was left inside), ID verification is disabled to prevent theft. This dynamic state transition resolves the contradiction by adapting security measures to actual conditions.
Solution Approach 2:
The passenger detection system provides feedback that triggers appropriate security responses. When sensors detect a passenger inside the vehicle, the system maintains normal ID verification functionality. When no passenger is detected after the device should have been removed, the system disables ID verification, thereby preventing unauthorized use while maintaining facility for authorized users.
3Ease of operation
If the disablement of the ID code is cancelled when the door unlock operation is conducted from outside, then the facility is improved allowing engine start again, but the security deteriorates because unauthorized persons could start the engine with the portable device
Solution Approach 1:
The system uses feedback from the door unlock operation and subsequent passenger detection to determine whether to cancel the disablement. When a door unlock operation is detected and a passenger is subsequently detected inside the vehicle, the system cancels the disablement, restoring facility. However, if no passenger is detected (suggesting the device was left inside), the disablement remains active, maintaining security. This conditional feedback mechanism resolves the contradiction.
Solution Approach 2:
The system dynamically adjusts the ID verification state based on the sequence of events: door unlock operation triggers a re-evaluation, and if passenger presence is confirmed, the system transitions from disabled to enabled state, restoring facility while maintaining security through conditional validation.
Data Source
AI summary
Even if there is the ID verification confirmation of the ID signal that is transmitted in response to the request signal of the vehicle-inside transmitting antenna at the lock of the doors, the disablement of the ID code of the transmitter located inside the vehicle that has been registered at the memory is prohibited when at least one of operations of the lock switch of the transmitter that is located outside or inside the vehicle and the vehicle-inside switches is detected. Accordingly, the passenger inside the vehicle can start the engine by using the transmitter left behind in the vehicle.