Vehicle theft prevention device

Abstract

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a system block diagram view of a theft prevention device according to one embodiment of the present invention;

FIG. 2 is a rear perspective view of a scooter-type motorcycle for mounting the theft prevention device of one embodiment of the present invention thereon;

FIG. 3 is a block diagram showing a second ID code registration function, and more particularly, a view showing a function necessary for registration processing at the time of assembling a finished vehicle in a factory;

FIG. 4 is a block diagram showing the second ID code registration function when the receiver unit is exchanged;

FIG. 5 is a flow chart showing registration processing of the second ID code when the receiver unit is exchanged;

FIG. 6 is a functional block diagram showing the registration function of the second ID code when only an ECU is exchanged with a brand new ECU; and

FIG. 7 a constitutional view of an immobilizer system.

Claims

1. A vehicle theft prevention device comprising: a portable transmitter arranged outside a vehicle for transmitting a first ID code;a receiver unit for receiving the first ID code transmitted from the portable transmitter and for outputting a second ID code when the first ID code agrees with a preset first reference code; andan engine control unit for starting an engine control when the second ID code is inputted to the engine control unit and the second ID code agrees with a preset second reference code;wherein the vehicle theft prevention device includes a code inputting means for recording the second reference code to the engine control unit, and a means for writing the registered second reference code into the receiver unit as the second ID code.

2. The vehicle theft prevention device according to claim 1, wherein the portable transmitter includes a deciphering means for deciding the first ID code based on a cipher inputted from the receiver unit, and the receiver unit includes a reference code decision means for deciding the first reference code based on the outputted cipher.

3. The vehicle theft prevention device according to claim 1, wherein a code which is inputted for registering the second reference code to the engine control unit is inputted in response to an open/close manipulation of a throttle provided to the vehicle and a standing/storing manipulation of a side stand provided to the vehicle.

4. The vehicle theft prevention device according to claim 2, wherein a code which is inputted for registering the second reference code to the engine control unit is inputted in response to an open/close manipulation of a throttle provided to the vehicle and a standing/storing manipulation of a side stand provided to the vehicle.

5. The vehicle theft prevention device according to claim 1, wherein the second reference code is a value intrinsic to each vehicle.

6. The vehicle theft prevention device according to claim 2, wherein the second reference code is a value intrinsic to each vehicle.

7. The vehicle theft prevention device according to claim 3, wherein the second reference code is a value intrinsic to each vehicle.

8. The vehicle theft prevention device according to claim 4, wherein the second reference code is a value intrinsic to each vehicle.

9. A theft prevention device adapted to be used with a vehicle comprising: a portable transmitter for transmitting a first ID code;a receiver unit for receiving the first ID code transmitted from the portable transmitter and for outputting a second ID code when the first ID code agrees with a preset first reference code; andan engine control unit adapted for starting an engine control when the second ID code is inputted and the second ID code agrees with a preset second reference code;wherein the vehicle theft prevention device includes a code inputting means for recording the second reference code to the engine control unit, and a means for writing the registered second reference code into the receiver unit as the second ID code.

10. The theft prevention device according to claim 9, wherein the portable transmitter includes a deciphering means for deciding the first ID code based on a cipher inputted from the receiver unit, and the receiver unit includes a reference code decision means for deciding the first reference code based on the outputted cipher.

11. The theft prevention device according to claim 9, wherein a code which is inputted for registering the second reference code to the engine control unit is inputted in response to an open/close manipulation of a throttle provided to the vehicle and a standing/storing manipulation of a side stand provided to the vehicle.

12. The theft prevention device according to claim 10, wherein a code which is inputted for registering the second reference code to the engine control unit is inputted in response to an open/close manipulation of a throttle provided to the vehicle and a standing/storing manipulation of a side stand provided to the vehicle.

13. The theft prevention device according to claim 9, wherein the second reference code is a value intrinsic to each vehicle.

14. The vehicle theft prevention device according to claim 10, wherein the second reference code is a value intrinsic to each vehicle.

15. The vehicle theft prevention device according to claim 11, wherein the second reference code is a value intrinsic to each vehicle.

16. The vehicle theft prevention device according to claim 12, wherein the second reference code is a value intrinsic to each vehicle.