JP4510604B2 - Vehicle anti-theft device - Google Patents

Description

  The present invention relates to a vehicle antitheft device.

Conventionally, as a vehicle antitheft device, for example, a vehicle antitheft device disclosed in Patent Document 1 has been proposed. This type of vehicle antitheft device collates the portable device side ID code of the portable device possessed by the user with the vehicle side ID code of the vehicle, and permits the engine to start when the two ID codes match. In general, when starting the engine based on such ID code verification, the engine startup is permitted based on mechanical verification based on matching of the recesses and protrusions between the keyway and the key cylinder. Thus, it is difficult to start the engine by unauthorized means, and the security level of the vehicle antitheft device is improved.
JP 2004-197668 A

  In recent years, as crimes targeting vehicles such as vehicle theft and vandalism increase, interest in improving the security level of vehicles has increased. Against this background, various devices having the effect of suppressing vehicle theft and vandalism have been proposed and provided, including the vehicle anti-theft device described above. However, the improvement of theft technology level by the theft and the improvement of the security level of the vehicle anti-theft device also have the aspect of “wet pretend”, and research and development for improving the security level of the vehicle anti-theft device is more important than ever. It has become.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicle theft prevention device that can further improve the security level.

In order to solve the above-described problem, in the invention according to claim 1, a portable device possessed by a user, an ID signal transmitted from the portable device, and a portable device-side ID code included in the ID signal are received. And a vehicle-side anti-theft device comprising a control unit that permits the vehicle to run when both ID codes match with each other and the vehicle-side ID code that the device itself has. Composed of a plurality of types of portable devices , the regular portable device has a portable device-side ID code of the regular portable device and a regular identification code indicating that the portable device is a regular portable device, the replenishment portable device includes a portable device ID code of the replenishment portable device, and a supplementary identification code indicating an in itself portable unit replenishment, the control unit, the positive Tadashiyo controller taken instead to become replenishment controller or we provided, wherein Supply for portable device, sends said identification code for the replenishment in response to a request signal from the replenishment control unit, said normal portable machine, identifying the normal response to a request signal from the replenishment control unit send the code, the replenishment control unit includes a storage means for user code user chromatography tHE was arbitrarily set is stored, the replenishment control unit, the supplementary identification code by transmitting the request signal When the mobile phone side of the replenishing mobile device has the registration authentication, it is determined whether or not the code input from the external device matches the user code. When the ID code is registered to itself as the vehicle-side ID code , the request signal is transmitted and the regular identification code is received, the registration authentication is not performed, and the portable device-side ID code that the regular portable device has The vehicle And it is required to register himself as an ID code.

In the invention described in claim 2, the vehicle theft prevention device according to claim 1, before Symbol supply control unit, the request signal transmitted to continue over time defining the identification code for said normal reception In this case, the gist is to register the portable device side ID code of the regular portable device as the vehicle side ID code.

The operation of the present invention will be described below.
According to the first aspect of the present invention, when the replenishment control unit receives the replenishment identification code from the replenishment portable device, the replenishment portable device performs registration authentication and the registration authentication is established. Is registered as a vehicle-side ID code. For this reason, the vehicle-side ID code cannot be added or rewritten for the set of the replenishment control unit and the replenishment portable device unless registration authentication is established. Changing the ID code is suppressed. For example, a vehicle control company and a regular portable device are delivered to a vehicle manufacturer, and a vehicle control unit and a supplemental portable device are delivered to other companies (for example, dealers and maintenance shops). The security level of the antitheft device can be further improved.

In particular, when the replenishment control unit receives the replenishment identification code, the portable device included in the replenishment portable device on condition that the code input from the external device matches the user code stored in the storage means The side ID code is registered to itself as the vehicle side ID code. That is, the replenishment control unit determines whether or not the vehicle-side ID code can be registered to itself based on the result of registration authentication using the user code. Thus, since the user code unique to the user is used when registering the vehicle-side ID code, changes in the vehicle-side ID code by a person other than the user can be further suppressed. Therefore, according to the present invention, the security level of the vehicle antitheft device can be further improved.

According to the second aspect of the present invention, when the replenishment control unit receives the regular identification code, the replenishment control unit does not perform registration authentication, but instead uses the portable device side ID code of the regular portable device on the vehicle side. A delay time is provided before registration as an ID code. That is, the replenishment control unit registers the portable device-side ID code of the regular portable device as the vehicle- side ID code when the request signal is transmitted and the regular identification code is continuously received for a specified time. For this reason, when registering the portable device side ID code of the regular portable device in the replenishment control unit, it is possible to register the portable device side ID code in the replenishment control unit without performing complicated operations such as registration authentication. it can. In addition, when a third party who cannot know the existence of the delay time registers the portable device side ID code in the replenishment control unit, the intended response is not fed back from the replenishment control unit. There is a high probability that the registration of the portable device side ID code will be given up after judging that the registration has failed. Therefore, according to the present invention, it is possible to improve the convenience of the vehicle antitheft device while preventing an unauthorized change of the vehicle side ID code by a third party.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle antitheft device which can improve a security level further can be provided.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the vehicle antitheft device 1 includes a regular portable device 10 (ignition key) and a regular control unit 20 that are supplied from a supply company 5 to a vehicle manufacturing company 6, and a dealer from the supply company 5. 7 is provided with a replenishing portable device 30 (ignition key) and a replenishment control unit 40. That is, in this embodiment, the portable devices 10 and 30 and the control units 20 and 40 are supplied from the supply company 5 through two distribution channels.

  The regular control unit 20 is disposed in the vehicle at the vehicle manufacturing company 6 when the vehicle is manufactured, for example. Similarly, in the vehicle manufacturer 6, the regular portable device 10 is registered in the regular control unit 20 so that the ID codes match between the regular portable device 10 and the regular control unit 20. On the other hand, the replenishment control unit 40 is provided to the user via the dealer 7 for replacement when the regular control unit 20 fails, for example. The replenishing portable device 30 is provided to the user via the dealer 7 when, for example, a spare portable device is required after purchasing a vehicle, or when the regular portable device 10 is lost.

  Hereinafter, the vehicle antitheft device 1 when the regular control unit 20 is replaced with the replenishment control unit 40 will be described. In the present embodiment, the description of the pair of the legitimate portable device 10 and the legitimate control unit 20 is omitted assuming that there is no room for unauthorized means.

  As shown in FIG. 2, the vehicle antitheft device 1 includes a replenishment control unit 40 and a transmission / reception circuit 41. An antenna 41 a disposed near the key cylinder in the vehicle is connected to the transmission / reception circuit 41. The replenishment control unit 40 can communicate with the regular portable device 10 and the replenishment portable device 30 via the transmission / reception circuit 41 and the antenna 41a.

The legitimate portable device 10 includes a transponder 10a. The replenishing portable device 30 includes a transponder 30a. In these transponders 10a and 30a, ID information is written in advance. Specifically, in the transponder 10a, its own ID code (portable device side ID code) and a regular identification code indicating that it is the regular portable device 10 are written as ID information, while in the transponder 30a, The own ID code (portable device side ID code) and the replenishment identification code indicating that it is the replenishment portable device 30 are written as ID information. When the magnetic energy is supplied, the transponders 10a and 30a are activated, modulate ID information recorded in advance to a predetermined frequency, and transmit it as an ID signal. That is, the legitimate portable device 10 transmits a legitimate identification code indicating itself according to the magnetic energy (request signal), while the replenishment portable device 30 indicates itself according to the request signal. A replenishment identification code to the effect is transmitted.

  When the activation signal is input from the replenishment control unit 40, the transmission / reception circuit 41 transmits a request signal having a predetermined frequency via the antenna 41a. That is, the transmission / reception circuit 41 supplies magnetic energy to the transponder 10a or the transponder 30a when an activation signal is input from the replenishment control unit 40. Further, when the transmission / reception circuit 41 receives the ID signal transmitted from the regular portable device 10 or the replenishment portable device 30 via the antenna 41a, the transmission / reception circuit 41 demodulates the ID signal into a pulse signal and outputs the pulse signal to the replenishment control unit 40. To do.

  The replenishment control unit 40 includes a CPU (not shown), a first memory 40a, a second memory 40b as storage means, and a counter. In the first memory 40a, the same ID code as each portable device side ID code of the regular portable device 10 and the replenishing portable device 30 is written in advance as a vehicle side ID code. On the other hand, an arbitrary default code (for example, four numeric characters) is written as a user code in the second memory 40b. The procedure for storing the portable device side ID code of the regular portable device 10 and the portable device side ID code of the replenishing portable device 30 in the first memory 40a will be described later.

  When the supply control unit 40 detects that the key plate portion of the regular portable device 10 or the supplemental portable device 30 is inserted into the key cylinder using a switch or the like, the supply control unit 40 outputs an activation signal to the transmission / reception circuit 41. The request signal is transmitted via the antenna 41a.

  When the ID signal is input as a response to the request signal, the replenishment control unit 40 performs collation to determine whether or not the portable device side ID code and the vehicle side ID code included in the ID signal match. . If both ID codes match, the replenishment control unit 40 outputs a travel permission signal. The travel permission signal is input to the engine control device or the like via, for example, an in-vehicle information network (for example, CAN: Controller Area Network). When the travel permission signal is input and the regular portable device 10 or the replenishing portable device 30 is rotated, the engine control device performs ignition control, fuel injection control, and the like to start the engine and Make it possible to run.

Next, a procedure for storing the portable device-side ID code of the regular portable device 10 and the portable device-side ID code of the replenishment portable device 30 in the first memory 40a of the replenishment control unit 40 will be described.
The replenishment control unit 40 registers a vehicle-side ID code when a code rewriting device (external device) 50 permanently installed in the dealer 7 is connected to the in-vehicle information network and a registration mode switching signal is input from the code rewriting device 50.・ Switch to a changeable mode (registration mode). Here, the code rewriting device 50 is configured to be connectable to an in-vehicle information network, and is a device for transmitting commands and data to the replenishment control unit 40 through the in-vehicle information network.

  In the registration mode, the replenishment control unit 40 performs registration processing for registering the portable device side ID code of the regular portable device 10 or the replenishment portable device 30 as the vehicle side ID code every predetermined time. Specifically, when the supply control unit 40 determines that the regular portable device 10 is inserted into the key cylinder, the portable device side ID code of the regular portable device 10 is stored in the first memory 40a after a predetermined time has elapsed. Write to. On the other hand, if it is determined that the replenishment portable device 30 is inserted in the key cylinder, the replenishment control unit 40 determines the portable device side ID of the replenishment portable device 30 on condition that registration authentication using the user code is established. By writing the code as the vehicle-side ID code in the first memory 40a, the replenishing portable device 30 is registered to itself. Then, the replenishment control unit 40 ends the registration mode. Hereinafter, the registration process performed by the replenishment control unit 40 will be described in detail according to the flowchart shown in FIG.

  First, in step 100, the replenishment control unit 40 determines whether or not an ID signal has been received. If it is determined that the ID signal has been received, the replenishment control unit 40 determines whether or not the regular identification code is included in the ID signal in step 101. When it is determined that the regular identification code is included in the ID signal, the replenishment control unit 40 determines that the regular portable device 10 has been inserted into the key cylinder. Then, the replenishment control unit 40 increments the count value M in step 102.

  In subsequent step 103, the replenishment control unit 40 determines whether or not the value of the count value M is larger than a threshold value TM (delay time). When it is determined that the value of the count value M is larger than the threshold value TM, that is, when it is determined that the state in which the ID signal is received continues for a time longer than the time indicated by the threshold value TM, the replenishment control In step 104, the unit 40 writes the portable device side ID code as the vehicle side ID code in the first memory 40a. In step 105, the replenishment control unit 40 resets the count value M (sets to “0”) and notifies that the portable device side ID code of the regular portable device 10 is registered as the vehicle side ID code ( For example, a notification is given by a buzzer provided in the vehicle compartment), and the process ends. As described above, when receiving the regular identification code, the replenishment control unit 40 writes the portable device side ID code in the first memory 40a as the vehicle side ID code after the period indicated by the delay time has elapsed.

  On the other hand, if it is determined in step 101 that the replenishment identification code is included in the ID signal, the replenishment control unit 40 receives a code (authentication code) of a predetermined format (code length etc.) from the code rewriting device 50 in step 106 Code) is determined. When it is determined that the authentication code is input from the code rewriting device 50, the replenishment control unit 40 determines whether or not the authentication code matches the user code in step 107 (registration authentication). If it is determined that the authentication code matches the user code and the registration authentication is established, the replenishment control unit 40 uses the portable device side ID code included in the ID signal in step 108 as the vehicle side ID code in the first memory 40a. Write and finish the process. In this way, the replenishment control unit 40 determines whether or not to perform registration authentication depending on whether the identification code for replenishment or the regular identification code is included in the ID signal, that is, depending on the type of the received identification code. Judgment. When the registration authentication is established and the vehicle-side ID code is already stored in the first memory 40a, the replenishment control unit 40 stores the portable device-side ID code of the replenishment portable device 30 in the first memory 40a. It may be changed so as to be additionally registered as the second vehicle-side ID code.

  Incidentally, the user code stored in the second memory 40b of the replenishment control unit 40 can be rewritten. When the change mode switching signal is input from the code rewriting device 50, the replenishment control unit 40 switches to a mode (change mode) in which the user code can be changed. In the change mode, if the authentication code input from the code rewriting device 50 matches the user code stored in the second memory 40b, the replenishment control unit 40 then renews the authentication code input from the code rewriting device 50. Is written in the second memory 40b as a user code. Then, the replenishment control unit 40 ends the change mode.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) When the replenishment control unit 40 receives the replenishment identification code, it determines whether or not the authentication code input from the code rewriting device 50 matches the user code stored in the second memory 40b. Perform registration authentication to judge. When the registration authentication is established, the replenishment control unit 40 writes the portable device side ID code of the replenishment portable device 30 in the first memory 40a as the vehicle side ID code. For this reason, the vehicle-side ID code cannot be added or rewritten for the set of the replenishment control unit 40 and the replenishment portable device 30 unless registration authentication is established. The change of the vehicle ID code is suppressed. That is, in the dealer 7, the vehicle-side ID code stored in the first memory 40 a of the supply control unit 40 cannot be changed unless the authentication code corresponding to the user code is input by the code rewriting device 50. Therefore, the security level of the vehicle antitheft device 1 can be further improved.

  (2) When the replenishment control unit 40 receives the replenishment identification code, the replenishment portable device 30 has the portable device-side ID code provided that the authentication code from the code rewriting device 50 matches the user code. It writes in the 1st memory 40a as a vehicle side ID code. That is, the replenishment control unit 40 determines whether or not to register the portable device side ID code as the vehicle side ID code based on the result of the registration authentication using the user code. Thus, since the user-specific user code is used when registering the vehicle-side ID code, it is possible to further suppress changes in the vehicle-side ID code by a person other than the user. Therefore, the security level of the vehicle antitheft device 1 can be further improved.

(3) When receiving the regular identification code, the replenishment control unit 40 writes the portable device side ID code as the vehicle side ID code in the first memory 40a after the period indicated by the delay time has elapsed. That is, when receiving the regular identification code, the replenishment control unit 40 does not perform registration authentication and provides a delay time until the portable device side ID code of the regular portable device 10 is registered as the vehicle side ID code. For this reason, about the regular portable device 10, the portable device side ID code can be written in the first memory 40a of the replenishment control unit 40 as a vehicle side ID code without performing a complicated operation such as registration authentication. Further, a third party who cannot know the existence of such a delay time has failed to register the portable device ID code because a notification indicating the completion of registration is not given from the replenishment control unit 40 for a certain period of time. There is a high probability of judging and giving up registration of the portable device side ID code. Therefore, according to the vehicle anti-theft device 1, the convenience of the vehicle anti-theft device 1 can be improved while suppressing an unauthorized change of the vehicle-side ID code by a third party.

  (4) In order to write the user code in the second memory 40b of the replenishment control unit 40, it is necessary to use the code rewriting device 50 provided in the dealer 7. For this reason, the user cannot set or change the user code directly, and the user needs to go to the dealer 7. Therefore, even if the user code leaks to a third party, the portable device side ID code can be written as the vehicle side ID code in the first memory 40a of the replenishment control unit 40 unless the third party goes to the dealer. Therefore, the security level of the vehicle antitheft device 1 can be further improved.

  (5) In the second memory 40b of the replenishment control unit 40, a preset default code is stored as a user code. For this reason, even when the user code is not set by the user, the third party cannot change the vehicle-side ID code without knowing the default code. Therefore, the user can save the trouble of setting the user code, and the convenience of the vehicle antitheft device 1 can be improved.

In addition, you may change the said embodiment as follows.
In the above embodiment, a default code that is different for each vehicle type may be written in advance in the second memory 40b as a user code. This saves the user the trouble of setting the user code, and even if the default code for a certain vehicle type is known to a third party, the default code for another vehicle type cannot be known, thus preventing vehicle theft. The security level of the device 1 can be further improved.

  In the above embodiment, the replenishment control unit 40 writes the portable device side ID code as the vehicle side ID code in the first memory 40a after a lapse of a certain time after receiving the regular identification code of the regular portable device 10. . However, when receiving the regular identification code, the replenishment control unit 40 writes the portable device side ID code in the first memory 40a when a predetermined operation unit is operated in a preset operation mode. Also good. That is, the delay time from when the replenishment control unit 40 receives the ID signal to when the portable device side ID code is registered is not limited to the period indicated by the count value M as in the above embodiment, but a predetermined operation unit May be set as a period resulting from operating in a predetermined manner. For example, when receiving the regular identification code of the regular portable device 10, the replenishment control unit 40 first uses the portable device side ID code as the vehicle side ID code after the door knob is operated in a preset operation mode. You may make it write in the memory 40a.

  In the above embodiment, the user code input method is not limited to the method using the code rewriting device 50. For example, when a numeric keypad provided in the vehicle compartment is operated in the registration mode, the replenishment control unit 40 may write a code input by the numeric keypad as a user code in the second memory 40b. Further, the user code input method may be changed for each vehicle type. In this way, the security level of the vehicle antitheft device 1 can be further improved.

  In the above embodiment, an authentication code used for registration authentication may be input by an operation from a numeric keypad provided in the vehicle compartment, instead of input from the code rewriting device 50.

  In the above embodiment, the registration authentication method is not limited to the verification of the authentication code input by the code rewriting device 50 and the user code. For example, the replenishment control unit 40 stores an operation mode preset by the user, for example, an operation mode in which a predetermined switch is pressed a plurality of times in the second memory 40b in advance. It may be changed so that registration authentication is determined to be established when the operation unit is operated.

  In the above embodiment, the regular control unit 20 may have the same configuration as the replenishment control unit 40. That is, when the regular control unit 20 transmits a request signal to the regular portable device 10 and the replenishment portable device 30 and receives the replenishment identification code, the authentication code input from the code rewriting device 50 and the user The portable device side ID code may be registered to itself as a vehicle side ID code on condition that the code matches.

  In addition, even when the replenishment control unit 40 transmits a request signal and receives the regular identification code, the portable device side ID code is used as the vehicle side ID code on the condition that the authentication code matches the user code. You may make it register.

Next, technical ideas that can be grasped from this embodiment and other embodiments will be described below.
(1) In the vehicle theft prevention device, wherein the storage unit, the default code different for each vehicle model is stored in advance as a user code.

  (2) The portable device possessed by the user and the ID signal transmitted from the portable device are received, and the portable device side ID code included in the ID signal is compared with the vehicle side ID code that the user has. In a vehicle antitheft device comprising a control unit that permits the vehicle to run when the ID code matches, a storage means for storing a user code arbitrarily set by a user is provided, and the code input from an external device is the user A vehicle anti-theft device characterized by registering the portable device side ID code as the vehicle side ID code on condition that it matches the code.

(3) In a vehicle anti-theft device provided with a control unit that permits the vehicle to run when both the ID codes match by collating the portable device-side ID code of the portable device with the vehicle-side ID code of the portable device. In the code registration method for registering the vehicle-side ID code in the control unit, the control unit transmits a request signal, transmits an identification code from the portable device that has received the request signal, and receives the identification code The control unit performs registration authentication when determining that the identification code is an identification code from the portable device that requires registration authentication, and sets the portable device side ID code on the vehicle side on condition that the registration authentication is established. A code registration method characterized by registering itself as an ID code. According to the invention described in the technical idea (3), the control unit that has received the identification code from the portable device performs registration authentication based on the identification code. Then, the control unit registers the portable device side ID code as the vehicle side ID code with the registration authentication as a condition. That is, the control unit determines whether or not to perform registration authentication depending on the type of the identification code. Therefore, according to the present invention, the security level of the vehicle antitheft device can be further improved.

The schematic diagram which shows the distribution | circulation aspect of the regular portable machine of the antitheft device in this embodiment, the regular control part, the supplementary portable machine, and the supplementary control part. The electric block diagram of the vehicle antitheft device. The flowchart which shows the registration process which the control part for replenishment of the vehicle antitheft device performs.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle antitheft device, 10 ... Regular portable machine, 20 ... Regular control part, 30 ... Replenishment portable machine, 40 ... Replenishment control part, 40b ... 2nd memory as a memory | storage means, 50 ... As external apparatus Code rewriting device.

Claims (2)

The portable device possessed by the user and the ID signal transmitted from the portable device are received, the portable device-side ID code included in the ID signal is compared with the vehicle-side ID code that the user has, and both ID codes are In a vehicle anti-theft device comprising a control unit that allows the vehicle to run when they match,
The portable device comprises a plurality of types of portable devices, regular portable devices and replenishment portable devices,
The regular portable device has a portable device-side ID code of the regular portable device and a regular identification code indicating that the portable device is a regular portable device,
The replenishing portable device has a portable device-side ID code of the replenishing portable device, and a replenishment identification code indicating that it is a replenishing portable device
Wherein the control unit includes a positive Tadashiyo controller instead it is made replenishment controller or we provided taken in,
The replenishment portable device transmits an identification code for the replenishment in response to a request signal from the replenishment control unit,
The legitimate portable device transmits the legitimate identification code in response to a request signal from the replenishment control unit,
The replenishment control unit includes a storage means for user code User chromatography THE was arbitrarily set is stored,
When the replenishment control unit transmits the request signal and receives the replenishment identification code, the replenishment control unit performs registration authentication to determine whether or not a code input from an external device matches the user code. When the registration authentication is established , the portable device side ID code of the replenishing portable device is registered as the vehicle side ID code , and the request signal is transmitted to receive the regular identification code. A vehicle antitheft device characterized by registering the portable device side ID code of the legitimate portable device as the vehicle side ID code without performing the registration authentication . Prior Symbol replenishment control unit, when sending the request signal received continuously over a specified time an identification code for said normal, the vehicle-side ID of the portable device ID code with the said normal portable device The vehicle antitheft device according to claim 1, wherein the vehicle antitheft device is registered as a code.

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