Vehicle Theft Prevention Device Using Throttle and Side Stand Code Input
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Solution Overview
Problem
Existing vehicle theft prevention devices can be compromised by exchanging the theft prevention unit, allowing unauthorized individuals to start a vehicle by rewriting the memory code, thus failing to prevent third-party access.
Innovation Solution
A vehicle theft prevention system that includes a portable transmitter, a receiver unit, and an engine control unit, which uses a second ID code generation mechanism intrinsic to each vehicle, requiring authorized input through throttle and side stand manipulations to register and output the correct code, preventing engine operation unless the correct code is entered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the theft prevention unit is exchanged with a brand new one, then the ID code can be rewritten to match the memory code, but this allows third parties to move the vehicle
Solution Approach 1:
The system divides the theft prevention functionality into two separate components: the receiver unit that generates the ID code and the engine control unit that stores the reference code. This segmentation ensures that even if one component is replaced, the other retains the authenticating information, preventing unauthorized access.
Solution Approach 2:
The second reference code is pre-registered in the engine control unit during vehicle assembly or initial setup. This preliminary action ensures that the authenticating code is already in place before any potential theft attempts, making it impossible for unauthorized users to successfully replace components and gain access.
2Ease of operation
If the memory code is written to the control unit during first use, then the theft prevention unit can control engine starting, but the code can be rewritten by exchanging the theft prevention unit
Solution Approach 1:
The system introduces a second layer of authentication by storing the second reference code in the engine control unit, separate from the first reference code in the receiver unit. This dimensional separation creates multiple authentication barriers, making it significantly more difficult for unauthorized users to compromise the system through simple component replacement.
3Adaptability or versatility
If a brand new engine control unit is exchanged, then the system should accept authorized code registration, but third parties might input erroneous codes
Solution Approach 1:
The system provides feedback through the indicator light to confirm successful code registration. When the second reference code is correctly registered in the engine control unit, the indicator light turns on, providing immediate feedback to the authorized user. This feedback mechanism prevents erroneous code registration by allowing unauthorized users to verify whether their input was successful.
Data Source
AI summary
A theft prevention device makes an ECU operable by transmitting a second ID code to the ECU from a keyset when an input code agrees with a first ID code. A device is provided for inputting a second reference code which is collated with a second ID code provided to a receiver unit of an ECU or a keyset. A device is provided which, when the inputted code and a pre-registered second reference code agree with each other, writes the registered second reference code into the receiver unit as the second ID code. The code which is inputted as the second reference code is inputted based on an opening/closing manipulation of a throttle provided to a vehicle and a plurality of times of standing/storing manipulation of a side stand with and one digit of the code being represented by the number of throttle manipulations during two side stand standing/storing manipulations.