JP3692593B2 - Vehicle anti-theft device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle antitheft device.
[0002]
[Prior art]
Conventionally, when a vehicle is stolen, the vehicle anti-theft device automatically reports the position of the vehicle to the operation center, notifies the police of the position information from the operation center, and returns the stolen vehicle to the police. It is known for the purpose of receiving.
[0003]
[Problems to be solved by the invention]
However, in the case of a conventional vehicle anti-theft device having a function of automatically reporting the position of the own vehicle to the operation center, a GPS (Global Positioning System), a car phone, a control unit, etc. for monitoring the position of the own vehicle If the thief finds that it is installed, the report of location information is easily stopped by destroying or removing it, and there was a problem that the recovery function could not be performed sufficiently .
[0004]
The present invention has been made in view of such a conventional problem, and if a vehicle thief destroys or removes an in-vehicle communication system, it automatically detects it, stops the engine, and cannot self-run. An object of the present invention is to provide a vehicle antitheft device that prevents vehicle theft.
[0005]
The present invention also reports the vehicle position to a predetermined location at the time of vehicle theft determination, receives a vehicle stop command transmitted from the predetermined location, and forcibly stops if traveling at a predetermined speed or less, It is an object of the present invention to provide a vehicle antitheft device that can enhance the safety to the surroundings and more reliably prevent theft.
[0006]
The present invention further sets an ID code for permitting operation between the in-vehicle communication system and the immobilizer unit, and prevents the in-vehicle communication system from operating unless the ID code verification is established when the engine is started. An object of the present invention is to provide a vehicle antitheft device.
[0007]
[Means for Solving the Problems]
The vehicle antitheft device of the invention of claim 1 is a vehicle position monitoring means for monitoring the position of the own vehicle, and an in-vehicle communication means for reporting the vehicle position information monitored by the vehicle position monitoring means to a predetermined place. The key ID number transmitted from the vehicle key is received and collated, and when the collation is established, the immobilizer unit that gives the engine start permission, the vehicle position monitoring means, and the vehicle-mounted communication means are diagnosed for abnormality. An abnormality diagnosis means that warns the vehicle when an abnormality is diagnosed, a failure determination means that gives an engine stop command to the immobilizer unit when a predetermined time has elapsed after the abnormality diagnosis means performs an abnormality diagnosis and performs a warning, and an abnormality diagnosis When a predetermined release code is received after the warning by the means and before the engine is stopped by the immobilizer unit, the destruction determination means Those having a fracture determination canceling means for canceling the operation.
[0008]
According to a second aspect of the present invention, in the vehicle antitheft device of the first aspect, when the in-vehicle communication means receives a predetermined release code transmitted from a predetermined location, the destruction determination releasing means cancels the operation of the destruction determination means. It is a thing.
[0009]
According to a third aspect of the present invention, in the vehicle antitheft device according to the first aspect, the destruction determination release means receives a predetermined release code input from an in-vehicle keyboard and releases the operation of the destruction determination means. is there.
[0010]
In these vehicle antitheft devices according to the first to third aspects of the present invention, the vehicle-mounted communication means reports the vehicle position information monitored by the vehicle position monitoring means to a predetermined place such as the operation center. Also, the abnormality diagnosis means diagnoses the presence / absence of abnormality between the own vehicle position monitoring means and the vehicle-mounted communication means, warns the vehicle when the abnormality is diagnosed, and after this warning, until a predetermined time elapses. When the predetermined release code is not received, the destruction determination means gives an engine stop command to the immobilizer unit to forcibly stop the engine of the vehicle. In this way, when the own vehicle position monitoring means and the in-vehicle communication means are illegally removed or destroyed, the vehicle is prevented from being self-propelled to prevent theft.
[0011]
Also, when the vehicle position monitoring means and the vehicle-mounted communication means break down and the abnormality diagnosis means determines that an abnormality has occurred, it is not necessary to stop the engine forcibly because it is not a vehicle theft, so after the abnormality diagnosis means performs a warning, When the passenger enters a predetermined release code before the destruction determination means operates, or when a predetermined release code sent from a predetermined location such as the operation center is received, the destruction determination means is kept from operating. To be able to drive.
[0012]
Invention of Claim 4 Is described in claim 1 The vehicle anti-theft device The in-vehicle communication means is Receives a vehicle stop command sent from a specified location And When the vehicle-mounted communication means receives the vehicle stop command, the vehicle-mounted communication means includes forced stop means for performing engine stop control if the host vehicle speed is lower than a predetermined speed.
[0013]
In the vehicle antitheft device according to the fourth aspect of the present invention, the user makes a telephone call or the in-vehicle antitheft device automatically reports the vehicle theft to a predetermined location, for example, the operation center through the in-vehicle communication device, and from the predetermined location. When the on-vehicle communication means receives the vehicle stop command when the vehicle stop command is transmitted, the forced stop means compares the own vehicle speed with a predetermined speed, and performs engine stop control if the vehicle speed is low.
[0014]
As a result, when a thief runs away from a stolen vehicle, the vehicle is forcibly stopped when the speed falls below a predetermined speed to prevent the escape and prevent the vehicle from being carried away without affecting the surroundings.
[0015]
According to a fifth aspect of the present invention, in the vehicle antitheft device according to the fourth aspect, the in-vehicle communication means Is The engine stop control by the forced stop means I do With During engine stop control The vehicle position monitoring means has a function of reporting vehicle position information monitored by the vehicle position monitoring means to the predetermined location.
[0016]
In the vehicle antitheft device according to the fifth aspect of the present invention, the stolen vehicle is forcibly stopped and the vehicle position at the time of the stop is reported to a predetermined place by the in-vehicle communication means. As a result, the location of the stolen vehicle can be confirmed and returned.
[0017]
According to a sixth aspect of the present invention, there is provided a vehicle antitheft device that receives and collates with an in-vehicle communication information means that communicates with a predetermined place and a key ID number transmitted from a vehicle key, and when collation is established. An immobilizer unit that gives permission to start the engine, an ID code setting unit that determines an ID code for the next engine start when the engine is stopped between the in-vehicle communication unit and the immobilizer unit, and the immobilizer unit becomes an ID code setting unit when the engine is started A communication function stop means is provided for collating the set ID code and disabling the operation of the in-vehicle communication means if the collation is not established.
[0018]
In the vehicle antitheft device according to the sixth aspect of the present invention, two-way communication is performed with a predetermined location, for example, an operation center through on-vehicle communication means, and necessary information transmitted from the predetermined location is received for driving. Use. However, in terms of information security, it is necessary to enable two-way communication with a predetermined place by a vehicle-mounted communication means only for a specific user. Therefore, the ID code at the next start is automatically decided between the immobilizer unit and the in-vehicle communication means when the engine is stopped, and if the ID code verification is not established, bidirectional communication with a predetermined place by the in-vehicle communication means To ensure information security.
[0019]
【The invention's effect】
According to the first to third aspects of the present invention, the abnormality diagnosing means diagnoses the presence / absence of abnormality between the own vehicle position monitoring means and the vehicle-mounted communication means, and when the abnormality is diagnosed, a warning is given to the inside of the vehicle. After that, when the predetermined time has passed, an engine stop command is given to the immobilizer unit to forcibly stop the vehicle engine, so that if the vehicle position monitoring means or in-vehicle communication means is illegally removed or destroyed, The self-running can no longer be performed and theft can be surely prevented.
[0020]
In addition, when the occupant inputs a predetermined release code or receives a predetermined release code transmitted from a predetermined place such as an operation center after the abnormality diagnosis means performs a warning and before the destruction determination means operates. Since the destruction determination means is not operated, the vehicle position monitoring means and the vehicle-mounted communication means can be continuously operated instead of the vehicle theft, and the vehicle theft can be prevented and There is no inconvenience to users.
[0021]
According to the invention of claim 4, when a vehicle theft occurs, a vehicle stop command is transmitted to a corresponding vehicle from a predetermined location such as an operation center, and when the vehicle-mounted communication means receives the vehicle stop command. Since the forced stop means controls the engine to stop if the vehicle speed is lower than the predetermined speed, if the thief is driving away from the stolen vehicle, It is forcibly stopped to prevent the escape, and the surroundings are not adversely affected at the time of the forced stop.
[0022]
According to the invention of claim 5, in the vehicle antitheft device of claim 4, the stolen vehicle is forcibly stopped and the vehicle position at the time of the stop is reported to a predetermined place by the in-vehicle communication means. Therefore, it is possible to check the location of the stolen vehicle that is no longer able to run on its own and return it, thereby enhancing the vehicle theft prevention effect.
[0023]
According to the invention of claim 6, the ID code at the next start is automatically determined when the engine is stopped between the immobilizer unit and the in-vehicle communication means, and if the ID code verification is not established, the predetermined place by the in-vehicle communication means Bi-directional communication is not permitted with the vehicle, so it can be used for driving by performing bi-directional communication with a predetermined place through in-vehicle communication means, and also ensuring information security it can.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a common embodiment of the vehicle antitheft device according to the first, second and fourth aspects of the present invention. The vehicle antitheft device according to this embodiment includes a key 2 having a predetermined key ID number registered and a transponder 1 capable of transmitting the key ID number signal, and an antenna 3 attached to a key cylinder of the vehicle. And the amplifier (AMP) 4, the engine controller (ECCS) 5 that controls the engine, and the key ID number from the transponder 1 received by the antenna 3 and amplified by the amplifier 4 are collated. When the engine start switch is established, the engine start switch can be turned on, and when the engine start switch is turned on by the key 2, the start permission ID code is collated with the engine controller 5, and the fuel injection control is performed on the engine controller 5 only when the collation is established. Is provided with an immobilizer unit (IMMC / U) 6.
[0025]
In addition to these, the vehicle anti-theft device has a control circuit 7a, a locator circuit 7b, and a modem circuit 7c. When each input signal satisfies a predetermined condition, it is determined that the theft has occurred, and an anti-theft alarm command, an anti-theft alarm command In-vehicle communication system (IVCS) 7, GPS 8 that gives the in-vehicle communication device 7 planar position information of the vehicle, and a predetermined time when the immobilizer unit 6 determines the occurrence of vehicle theft. There is a car phone 10 which automatically dials the telephone number, here the operation center 9, and transmits theft occurrence and own vehicle position information.
[0026]
The vehicle antitheft device further operates to make the horn 11 continuously ring when the immobilizer unit 6 determines the occurrence of the vehicle theft, and to flash around the flasher lamp and the headlamp 12 to notify the surrounding people of the theft occurrence. An alarm unit 13 is provided. This alarm unit 13 also has an inclination sensor at a predetermined angle against a theft in which a door, trunk, hood or the like is opened without following a normal key operation or keyless entry operation, and the vehicle is to be carried away by a tow truck. An alarm operation is also performed when it is detected that the above inclination has occurred.
[0027]
The immobilizer unit 6 performs verification processing of the key ID number of the key 2 described above and verification processing of the start permission ID code with the engine controller 5 and also performs failure diagnosis processing of the in-vehicle communication device 7 and the GPS 8 at a predetermined cycle. When these abnormalities are detected, a warning lamp (W / L) 14 installed in the vehicle is turned on, and at the same time, the operation center 9 is automatically notified of the occurrence of a failure through the automobile telephone 10, and then for a predetermined time. A function for causing the alarm unit 13 to perform a theft alarm when the time has elapsed and for the engine controller 5 to stop fuel injection when the vehicle speed detected by the speed sensor 15 is equal to or less than a predetermined value; From the operation center 9 until the predetermined time has passed after reporting the failure It has a function to prohibit the alarm operation and the engine stop operation when receiving a removal instruction.
[0028]
Next, the operation of the vehicle anti-theft device configured as described above will be described based on the flowchart of FIG. When starting the engine, the key ID number signal transmitted from the transponder 1 when the key 2 is inserted into the key cylinder and rotated is received by the antenna 3, amplified by the amplifier 4, and transmitted to the immobilizer unit 6.
[0029]
The immobilizer unit 6 collates the key ID number registered in advance with the key ID number from the transponder 1, and when the collation is established, determines that it is a starting operation with a regular key and turns on the accessory switch and key switch. Allow and connect the electrical system to the battery power supply.
[0030]
Next, the immobilizer unit 6 collates with the engine controller 5 the start permission ID code determined in advance during the previous engine stop operation. If the collation is established, the engine controller 5 is permitted to perform fuel injection control and the engine can be started. To do. Here, if the ID code verification is not established, the engine controller 5 is not allowed to perform fuel injection control. Therefore, even if the cell motor rotates, the engine cannot be started, theft by an unauthorized key is prevented, and the immobilizer unit 6 In addition, even the large-scale thief who replaces the engine controller 5 and the engine controller 5 is prevented from stealing the vehicle, thereby preventing vehicle theft.
[0031]
Further, during the traveling of the vehicle, the in-vehicle communication device 7 periodically reports the own vehicle position information detected by the GPS 8 to the operation center 9 through the automobile telephone 10 and monitors the position information of the vehicle on the operation center 9 side.
[0032]
However, if the thief steals the vehicle by some clever means that cannot be prevented even by the vehicle theft function, and the self-propelled vehicle such as this, the automatic position report function determines the position of the stolen vehicle at the operation center 9. Therefore, it is expected that the thief takes measures to destroy the in-vehicle communication device 7 and the GPS 8 so that they cannot be notified.
[0033]
In preparation for this, the immobilizer unit 6 periodically performs failure diagnosis of the in-vehicle communication device 7 and the GPS 8 in accordance with the procedure shown in FIG. 2, and automatically notifies the operation center 9 when an abnormality occurs. That is, failure diagnosis is periodically executed (step S1), and if an abnormality has occurred (step S2), the warning lamp 14 in the vehicle is first turned on to notify the driver, and at the same time, an abnormality also occurs in the operation center 9. Is notified through the car phone 10 (step S3). Turning on the warning lamp 14 may cause some trouble during the operation of a regular user, but if the proper procedure operation that should be known to the regular user is taken when the warning lamp 14 is lit, This is because the next alarm operation or engine stop process is not performed.
[0034]
If the warning lamp 14 is turned on and a cancel command is not transmitted from the operation center 9 even after a predetermined time has elapsed, it is considered that the driving is by the thief (steps S4 to S6).
[0035]
Then, a speed signal is taken from the speed sensor 15, and if it is less than the predetermined speed, an engine stop command is given to the engine controller 5 to stop the engine (steps S7 and S8), and the alarm unit 13 is operated to continuously turn the horn 11 The flasher lamp and the headlamp 12 are flashed and informed that the vehicle is a stolen car (step S9).
[0036]
Note that even when the theft is determined in the above steps S4 to S6, if the vehicle speed is not less than the predetermined value, forced engine stop control is performed in order to prevent a nearby person or vehicle from being affected by a sudden stop due to engine stop. Is not performed, only the alarm operation is performed and the surroundings are notified (steps S7 and S9).
[0037]
Thus, in the vehicle antitheft device of the first embodiment, the in-vehicle communication device 7, the GPS 8, and the car phone 9 are destroyed so that the thief is not known and tracked by the operation center 9. It is judged that there is a high probability of theft when it is removed or removed, and theft is prevented by forced stop and alarm operation of the engine, and when the vehicle speed is high, the forced stop of the engine is prohibited and the adverse effects on the surroundings are prevented. It prevents it in advance.
[0038]
Next, a common embodiment of the vehicle antitheft device according to claims 1, 3 and 4 of the present invention will be described with reference to FIG. The feature of this embodiment is that the immobilizer unit 6 periodically diagnoses a failure of the car phone 10 in addition to the in-vehicle communication device 7 and the GPS 8, and turns on the warning lamp 14 at the time of any failure diagnosis. The engine stop control and the alarm operation control are prohibited by inputting a predetermined release code through a keyboard 16 installed in the vehicle until a predetermined time elapses after the 14 is turned on. Other configurations are the same as those in the first embodiment shown in FIG.
[0039]
In the second embodiment, the immobilizer unit 6 inputs the release code in step S5 in the flowchart of FIG. 2 by the user using the keyboard 16 within a predetermined time after the warning lamp 14 is turned on. In addition, the alarm action is not performed.
[0040]
The release code input using the keyboard 16 is registered in advance by a legitimate user. Therefore, the thief cannot decode the release code and cannot input the correct release code within a predetermined time. Therefore, if the in-vehicle communication device 7, the GPS 8 or the car phone 10 is destroyed or removed, an alarm must be issued. The operation can be performed, and if the vehicle is traveling at a predetermined speed or less, the engine can be forcibly stopped to prevent theft.
[0041]
If the user is a legitimate user, if the in-vehicle communication device 7, the GPS 8 or the car phone 10 breaks down and the warning lamp 14 is turned on, the alarm operation and the engine stop operation are prohibited by an operation of inputting a predetermined release code through the keyboard 16. It is possible to reduce the inconvenience of operability.
[0042]
In the first and second embodiments, the forced stop control of the engine is executed only when the speed is equal to or lower than a predetermined speed. However, this is not particularly limited, and the first to second embodiments are not limited thereto. The embodiment of the invention of Item 3 includes a technique for performing the forced stop control of the engine regardless of the traveling speed. In this case, the engine stop control can be performed in a manner such as stopping the engine when the fuel runs out.
[0043]
Next, an embodiment of the vehicle antitheft device according to claims 4 and 5 of the present invention will be described with reference to FIGS. The feature of the third embodiment is that if an engine stop command transmitted from the operation center 9 is received by the car phone 10, the engine unit 6 can be operated if the immobilizer unit 6 is not more than a predetermined value when the vehicle speed of the speed sensor 15 is observed. A feature is that the controller 5 is forced to stop the engine, and at the same time, the own vehicle position at the time of stop detected by the GPS 8 is automatically transmitted to the operation center 9 through the automobile telephone 10. Therefore, other configurations are the same as those in the first embodiment shown in FIG. 1, and detailed descriptions thereof are omitted by giving the same reference numerals.
[0044]
In the third embodiment, when the user notices the theft and calls the operation center 9 to report the stolen vehicle, the operation center 9 urgently sends a stop command to the stolen vehicle, and the corresponding vehicle When the car phone 10 receives the command, the immobilizer unit 6 gives an engine stop command to the engine controller 5 according to the flowchart shown in FIG. 5 to forcibly stop the engine.
[0045]
That is, it is periodically determined whether or not an engine stop command is sent from the operation center 9 (step S21), and if the engine stop command is received, it is determined whether or not the vehicle speed is a predetermined value or less (step S22).
[0046]
If the vehicle speed is less than or equal to a predetermined value, the immobilizer unit 6 gives an engine stop command to the engine controller 5, and the engine controller 5 stops the fuel injection control to forcibly stop the vehicle (step S23). Further, the immobilizer unit 6 Gives an alarm command to the alarm unit 13 and causes the horn 11, the flasher lamp, and the head lamp 12 to perform an alarm operation to inform the surroundings that the car is a stolen car (step S24). At the same time, the immobilizer unit 6 gives a command to the in-vehicle communication device 7 to transmit information on the current position detected by the GPS 8, that is, information on the stop position, to the operation center 9 through the car phone 10 (step S25).
[0047]
As a result, the operation center 9 that has received the report of the stolen vehicle can urgently stop the corresponding stolen vehicle and can also specify its current position, thereby preventing vehicle theft.
[0048]
If the vehicle speed when the engine stop command is received is higher than the predetermined speed, the forced stop control is not performed (step S22), and only the alarm operation is performed to inform the surroundings of the stolen vehicle ( In step S24), the vehicle position is transmitted to the operation center 9 (step S25). This prevents the surroundings from being adversely affected by a forced stop during high-speed traveling.
[0049]
Note that the embodiment of the invention of claim 4 is not limited to the above-described third embodiment, and includes a technique for performing the forced stop control of the engine regardless of the traveling speed. In this case, the engine stop control can be performed in a manner such as stopping the engine when the fuel runs out.
[0050]
Next, an embodiment of the vehicle antitheft device according to claim 6 of the present invention will be described with reference to FIGS. In accordance with the widespread use of the automobile phone 10, information communication may be performed bidirectionally with a predetermined location, for example, the operation center 9, and information unique to each vehicle may be received from the operation center 9 and used. Information security that allows only legitimate users to receive and obtain information on this is important.
[0051]
Therefore, in the fourth embodiment, the start ID code at the next start is set when the engine is stopped with the immobilizer unit 6 together with the control circuit 7a, the locator circuit 7b, and the modem circuit 7c in the in-vehicle communication device 7, and the engine An ID code setting unit 7d for checking the ID code at the time of starting is provided. Other constituent elements are substantially the same as those of the first embodiment shown in FIG. 1, and the same reference numerals are given and detailed description thereof is omitted.
[0052]
The in-vehicle communication device 7 periodically transmits the vehicle position detected by the GPS 8 to the operation center 9 through the automobile phone 10, and the operation center 9 manages the current position of each vehicle. And if it becomes a stolen vehicle as in the first embodiment and the in-vehicle communication device 7 and the GPS 8 are destroyed, the immobilizer unit 6 turns on the warning lamp 14 and notifies the operation center 9 through the car phone 10, If the release code is not transmitted from the operation center 9 within a predetermined time, the engine stop control is forcibly performed.
[0053]
In addition to such a function, the ID code setting unit 7d of the in-vehicle communication device 7 determines the ID code for the next activation with the immobilizer unit 6 during engine stop control (step S31) as shown in the flowchart of FIG. (Steps S32 and S33).
[0054]
Next time, when the engine is newly started, the ID code registered in the ID code setting unit 7d is collated between the immobilizer unit 6 and the in-vehicle communication device 7, and when the collation is established, the in-vehicle communication device 7 When an information request is made from the in-vehicle communication device 7 to the operation center 9 through the automobile telephone 10, a code indicating that ID code verification is established is transmitted simultaneously, and the operation center 9 confirms the verification establishment code. Then, the requested information is transmitted. As a result, the security of communication information between the in-vehicle communication device 7 and the operation center 9 can be protected.
[0055]
Note that the vehicle antitheft device of the invention of claim 6 is not limited to the fourth embodiment shown in FIG. 6, and those in-vehicle communication devices 7 are also used in the second embodiment and the third embodiment. This can be realized in the same manner by incorporating the ID code setting unit 7d.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of a first embodiment of the present invention.
FIG. 2 is a flowchart of a vehicle anti-theft processing procedure in the above embodiment.
FIG. 3 is a functional block diagram of a second embodiment of the present invention.
FIG. 4 is a functional block diagram according to a third embodiment of the present invention.
FIG. 5 is a flowchart showing a vehicle theft prevention processing procedure in the embodiment.
FIG. 6 is a functional block diagram of a fourth embodiment of the present invention.
FIG. 7 is a flowchart of ID code setting processing of the in-vehicle communication device in the above embodiment.
[Explanation of symbols]
1 transponder
2 key
3 Antenna
4 Amplifier
5 Engine controller
6 Immobilizer unit
7 In-vehicle communication device
7a Control circuit
7b Rotary circuit
7c modem circuit
7d ID code setting section
8 GPS
9 Operation Center
10 Car phone
13 Alarm unit
14 Warning lamp
15 Speed sensor
16 keyboard

Claims (6)

Own vehicle position monitoring means for monitoring the position of the own vehicle;
Vehicle-mounted communication means for reporting the vehicle position information monitored by the vehicle position monitoring means to a predetermined location;
An immobilizer unit that receives and collates a key ID number transmitted from a vehicle key, and grants engine start permission when collation is established;
An abnormality diagnosis unit that diagnoses the presence or absence of an abnormality between the vehicle position monitoring unit and the vehicle-mounted communication unit, and performs a warning in the vehicle when the abnormality is diagnosed;
A failure determination means for giving an engine stop command to the immobilizer unit when a predetermined time has elapsed after the abnormality diagnosis means diagnoses the abnormality and performs a warning; after the warning by the abnormality diagnosis means, the engine by the immobilizer unit A vehicle antitheft device comprising destruction determination cancellation means for canceling the operation of the destruction determination means when a predetermined cancellation code is received before stopping.   2. The vehicle theft prevention according to claim 1, wherein when the in-vehicle communication means receives the predetermined release code transmitted from the predetermined location, the destruction determination release means releases the operation of the destruction determination means. apparatus.   2. The vehicle antitheft device according to claim 1, wherein the destruction determination cancellation unit receives the predetermined cancellation code input from a vehicle-mounted keyboard and cancels the operation of the destruction determination unit. The in-vehicle communication means receives a vehicle stop command transmitted from a predetermined location ,
When the vehicle-mounted communication means receives the vehicle stop command, the vehicle-mounted communication means includes forced stop means for performing engine stop control if the host vehicle speed is lower than a predetermined speed.
The vehicle antitheft device according to claim 1 . The in-vehicle communication unit has a function of performing the engine stop control by the forced stop unit and reporting the vehicle position information monitored by the vehicle position monitor unit during the engine stop control to the predetermined location. The vehicle antitheft device according to claim 4. An in-vehicle communication means for communicating with a predetermined place;
An immobilizer unit that receives and collates a key ID number transmitted from a vehicle key, and grants engine start permission when collation is established;
ID code setting means for determining an ID code at the next engine start when the engine is stopped between the in-vehicle communication means and the immobilizer unit;
A communication function stop means for checking the ID code set in the ID code setting means when the engine is started, and disabling the operation of the in-vehicle communication means if the verification is not established; Vehicle anti-theft device.

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