Utility Vehicle Speed Limiter Locking for Authorized Changes
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Solution Overview
Problem
Existing utility vehicle speed limiting systems do not prevent vehicle speed limits set by a specific person from being changed by anyone other than that person.
Innovation Solution
A utility vehicle equipped with a vehicle speed limiting operation tool and a prohibition unit that allows the specific person to prohibit or permit changes to the vehicle speed limit, using an attachment and detachment mechanism to secure or remove the speed limiting tool, along with a display section to indicate the set speed limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle speed limiting operation tool is made detachable to prevent unauthorized changes, then the security against unauthorized modification is improved, but the ease of operation for authorized changes deteriorates
Solution Approach 1:
The patent introduces an attachment tool as an intermediary device that mediates between the speed limiting operation tool and the vehicle body. The attachment tool has a first engagement portion that couples with the vehicle body and a second engagement portion that couples with the speed limiting operation tool. This intermediary mechanism allows only authorized persons with the specific attachment tool to detach or attach the speed limiting operation tool, thereby preventing unauthorized changes while maintaining ease of operation for authorized personnel.
2Adaptability or versatility
If the vehicle speed limit settings are made changeable by any driver, then the adaptability to different driving needs is improved, but the control over who can modify settings deteriorates
Solution Approach 1:
The attachment tool serves as an intermediary authorization mechanism that enables adaptability for different driving needs while maintaining control over who can modify settings. By requiring the attachment tool for any modification, the system allows multiple authorized drivers to change speed limits according to their needs, while the physical intermediary prevents unauthorized modifications.
Solution Approach 2:
The patent extracts the authorization control function from the vehicle's electronic system and implements it through a separate physical attachment tool. This extraction allows the vehicle to maintain simple authorization control through a physical mechanism while still enabling adaptability for different drivers' needs through the same tool.
3Ease of operation
If the speed limiting operation tool is permanently fixed to the vehicle body, then the ease of operation is improved, but the ability to prevent unauthorized changes deteriorates
Solution Approach 1:
The patent applies dynamics by making the connection between the speed limiting operation tool and the vehicle body changeable rather than fixed. The attachment tool enables the system to dynamically switch between attached (protected) and detached (modifiable) states. This dynamic approach allows the system to maintain ease of operation when attached while providing protection against unauthorized changes through the ability to detach.
Solution Approach 2:
The attachment tool acts as a intermediary that enables both ease of operation and protection against unauthorized changes. When attached, it provides easy access to speed limiting functions; when detached, it prevents unauthorized modifications. The intermediary mechanism thus resolves the contradiction between ease of operation and security.
Data Source
AI summary
A utility vehicle includes traveling devices 11, 12 that support a travel body on a ground surface; a motive power unit provided on the travel body; a power transmission device 20 that transmits motive power from the motive power unit to the traveling devices 11, 12 as travel power; a speed change operation tool 18 that changes a vehicle speed, which is the speed of the travel power, a vehicle speed limiting operation tool 34 that sets an upper limit of the vehicle speed, and a vehicle speed limiting operation prohibition unit 35 that prohibits operation of the vehicle speed limiting operation tool.