Vehicle Function Restriction System with Dynamic Valet Key Scenarios
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Solution Overview
Problem
Existing vehicle function restriction systems lack versatility in restricting vehicle functions based on the person to whom the vehicle is lent, as they only offer a single restriction state when using a valet key.
Innovation Solution
A vehicle function restriction system that includes a valet key mounted in the vehicle, allowing the user to set different restriction levels and valid periods for various vehicle functions when lending the vehicle to another person, using a restriction setting unit to impose activation restrictions based on the valet key's dismounting and re-mounting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single restriction state is implemented for valet key usage, then the system is simple to operate, but the adaptability to different lending scenarios is poor
Solution Approach 1:
The system dynamically adjusts the restriction state based on the detected lending scenario. The restriction ECU receives scenario information from the scenario setting unit and automatically configures appropriate function restrictions, transforming a static single-state system into a dynamic multi-state system that adapts to different situations while maintaining ease of operation.
Solution Approach 2:
The system changes the restriction parameters (which functions are restricted and for how long) based on the lending scenario. Different scenarios trigger different restriction configurations, allowing the same valet key system to provide customized restriction levels for different lending purposes without requiring manual reconfiguration by the user.
2Adaptability or versatility
If multiple restriction states are implemented for different lending scenarios, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The restriction ECU serves multiple functions: it manages the valet key authentication, determines the lending scenario based on input from the scenario setting unit, configures appropriate restrictions, and enforces them across different vehicle systems. This multi-functional approach allows the system to handle multiple restriction scenarios without adding separate dedicated systems for each function.
Solution Approach 2:
The scenario setting unit acts as an intermediary between the user and the restriction ECU. It provides a user-friendly interface for selecting lending scenarios and translates these selections into specific restriction configurations that the restriction ECU can execute, simplifying the overall system architecture while enabling multiple restriction states.
3Ease of operation
If fixed restriction periods are implemented, then the system is easier to manage, but the flexibility to accommodate different lending durations is reduced
Solution Approach 1:
The restriction period is dynamically determined based on the lending scenario selected by the user. Different scenarios can specify different duration parameters, allowing the system to automatically adjust the restriction period to match the intended lending duration. This dynamic approach maintains ease of operation while providing adaptability to various time requirements.
Data Source
AI summary
A vehicle function restriction system for installation in a vehicle. The vehicle includes a master key allowed to activate any function of the vehicle. The system includes a valet key mounted in the vehicle and configured to dismountable from the vehicle to be lent to a person to whom the vehicle is lent. A restriction setting unit sets the vehicle in a restriction state when the valet key is dismounted from the vehicle. The restriction setting unit sets at least one restricted vehicle functions which is not activated by the valet key, in accordance with the person to whom the vehicle is lent.