JP4644987B2 - Anti-theft device for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for preventing vehicle theft.
[0002]
[Prior art]
When the vehicle key with the ID number stored is inserted into the ignition key cylinder and turned, the ID number is verified between the in-vehicle immobilizer and the key, and if the key ID number matches the pre-stored ID number, the immobilizer further A vehicle antitheft device is known in which an ID number is collated between the engine controller and the engine controller, and if the ID number matching result is obtained, the engine is allowed to start or continue to operate (e.g. -131568).
[0003]
[Problems to be solved by the invention]
However, the conventional vehicle antitheft device cannot be said to have sufficient antitheft performance, and further improvement is desired.
[0004]
An object of the present invention is to improve the anti-theft performance.
[0005]
[Means for Solving the Problems]
(1) Invention of Claim 1 memorize | stores a 1st ID number, The portable vehicle key which can transmit the 1st ID number, The engine control apparatus which memorize | stores a 2nd ID number, 3rd The anti-theft device for a vehicle for collating the ID numbers with the electrical parts that store the ID numbers and determining permission or non-permission of engine starting and operation continuation, wherein the fourth ID number, Storage means for storing an ID number and a sixth ID number; ID reading means for reading out each ID number from the vehicle key, the engine control device and the electrical component; and the first ID number of the vehicle key It matches the fourth ID number of the storage means, the second ID number of the engine control device matches the fifth ID number of the storage means, and the third ID number of the electrical component is The sixth of the storage means ID matching means for permitting the engine to start and continue operation when the ID number matches the ID number.
(2) The vehicle antitheft device according to claim 1 includes removal storage means for detecting and storing that the vehicle antitheft device has been removed from the vehicle, and the ID verification means stores the vehicle antitheft device in the removal storage means. If no removal is stored, the third ID number of the electrical component and the sixth ID number of the storage means are not collated, and both ID numbers match.
(3) In the vehicle antitheft device according to claim 3, the storage unit stores a verification result of the third ID number of the electrical component by the ID verification unit and the sixth ID number of the storage unit, When the ID collating unit stores the ID mismatch of the electrical component in the storage unit, the electrical component can be used even if the removal storage unit does not store the removal of the vehicle antitheft device. The third ID number is compared with the sixth ID number of the storage means.
(4) In the vehicle antitheft device according to claim 4, there are a plurality of the electrical parts, each storing a third ID number, and the ID reading means obtains a third ID from all the electrical parts. Reading, by the ID collating means, the third ID number of each electrical component is collated with the sixth ID number of the storage means, and the first ID number of the vehicle key is the fourth ID number of the storage means. The second ID number of the engine control device matches the fifth ID number of the storage means, and the third ID numbers of all the electrical components are the same as those of the storage means. When it matches with the sixth ID number, the engine is allowed to start and continue to operate.
(5) In the vehicle antitheft device according to claim 5, when there is an electrical component whose third ID number cannot be read by the ID reading unit by the ID verification unit, the electrical component is an ID verification target electrical component. Excluded from parts.
(6) The vehicle antitheft device according to claim 6 is configured so that the ID collating unit repeats the reading of the third ID number from the plurality of electrical components by the ID reading unit a predetermined number of times. When the third ID number cannot be read from the electrical component, engine start and operation continuation are not permitted.
(7) In the vehicle antitheft device according to claim 7, when a blank ID number is read from the electrical component by the ID collating unit by the ID collating unit, a sixth ID of the storage unit is stored in the electrical component. The ID number is sent and stored.
[0006]
【The invention's effect】
(1) According to the invention of claim 1, the first ID number of the vehicle key coincides with the fourth ID number of the storage means, and the second ID number of the engine control device is the fifth ID number of the storage means. The anti-theft performance has been improved by allowing the engine to start and continue operating when the third ID number of the electrical component matches the sixth ID number of the storage means. Can be made.
(2) According to the invention of claim 2, when removal of the vehicle antitheft device is not stored in the removal storage means, the third ID number of the electrical component is compared with the sixth ID number of the storage means Since both ID numbers match each other, the time required for ID verification can be reduced without deteriorating the anti-theft performance.
(3) According to the invention of claim 3, when the ID mismatch of the electrical component is stored in the storage means, even if the removal of the vehicle antitheft device is not stored in the removal storage means, Since the third ID number of the electrical component and the sixth ID number of the storage means are collated, the antitheft performance can be improved.
(4) According to the invention of claim 4, the first ID number of the vehicle key coincides with the fourth ID number of the storage means, and the second ID number of the engine control device is the fifth ID number of the storage means. When the third ID number of all electrical parts matches the sixth ID number of the storage means, the engine start and the continued operation are permitted. Can be further improved.
(5) According to the invention of claim 5, when there is an electrical component for which the third ID number cannot be read out, the electrical component is excluded from the electrical component subject to ID verification. Even when an electrical component is replaced by a person or when an electrical component fails, engine start-up and operation continuation can be permitted without deteriorating the anti-theft performance.
(6) According to the invention of claim 6, when the third ID number cannot be read from all the electrical components even if the readout of the third ID number from a plurality of electrical components is repeated a predetermined number of times. Since the engine is not allowed to start and continue to operate, even if the reading of the ID number from the electrical parts fails, it is possible to avoid immediately disabling the engine starting and continuing operation. .
(7) According to the invention of claim 7, when the blank ID number is read from the electrical component, the sixth ID number of the storage means is sent to the electrical component for storage. Even when a part is replaced with a new part, a new electrical part can be used as an effective electrical part for ID collation, and deterioration of the anti-theft performance accompanying electrical part replacement can be prevented.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the configuration of an embodiment. A vehicle antitheft device (on-vehicle device) 2 according to an embodiment stores a first ID number (hereinafter referred to as ID1), a portable vehicle key 1 capable of transmitting the ID1 wirelessly, and a second The ID number is collated between the engine controller 5 that stores the ID number (hereinafter referred to as ID2) and the electrical components 7 to 9 that store the third ID number (hereinafter referred to as ID3). Determine permission or disapproval of starting and continuing operation.
[0008]
An antenna 1a, a capacitor 1b, and a nonvolatile memory 1c are embedded in the head portion of the vehicle key 1. The antenna 1a receives a signal radio wave having a predetermined frequency transmitted from the key ID reading device 3 of the in-vehicle device 2, and the capacitor 1b stores the signal received by the antenna 1a as ID transmission power. The vehicle-specific ID 1 is stored in advance in the nonvolatile memory 1c, and when the transmission of the signal radio wave from the key ID reading device 3 is completed, the key ID reading device 3 from the antenna 1a is used using the power stored in the capacitor 1b. ID1 of the memory 1c is transmitted to.
[0009]
The in-vehicle device 2 includes a key ID reading device 3, an immobilizer 4, and a power source 6. The switch 10 is an ignition switch that is turned on when the vehicle key 1 is inserted into an ignition key cylinder (not shown) and set to the ON position or the START position.
[0010]
The key ID reading device 3 is installed in an ignition key cylinder and includes an antenna 3a, a switch 3b, an oscillator 3c, a decoder 3d, and the like. When the vehicle key 1 is inserted into the ignition key cylinder and set to the ON position or the START position, the ignition switch 10 is turned on, and an ID1 reading command for the vehicle key 1 is sent from the immobilizer 4 described later to the key ID reading device 3. Upon receiving this command, the key ID reading device 3 switches the switch 3b to the transmission T side, and transmits a signal of a predetermined frequency output from the oscillator 3c to the vehicle key 1 via the antenna 3a for a predetermined time. When the transmission of the signal radio wave to the vehicle key 1 is completed, the key ID reading device 3 switches the switch 3b to the reception R side, receives ID1 transmitted from the vehicle key 1 via the antenna 3a, and receives the ID number from the decoder 3d. Is demodulated and sent to the immobilizer 4.
[0011]
The immobilizer 4 includes a CPU 4a, a memory 4b, a power-on reset circuit 4c, and the like, and the IDs stored in advance in the vehicle key 1, the engine controller 5 and the electrical components 7 to 9 are checked against respective registered IDs, Determine whether to allow or discontinue starting and continuing operation. The memory 4b has a fourth ID number (hereinafter referred to as ID4) and a fifth ID registered in advance for collation with ID1 of the vehicle key 1, ID2 of the engine controller 5, and ID3 of the electrical components 7-9. A number (hereinafter referred to as ID5), a sixth ID number (hereinafter referred to as ID6), information on an electrical component for which an ID is requested (hereinafter referred to as an effective electrical component), and effective electrical components 7-9 The ID collation result, the number of ID requests to the effective electrical components 7-9, the power-on reset flag, etc. are stored.
[0012]
The power-on reset circuit 4c outputs a power-on reset signal when power is supplied from the power source 6 to the immobilizer 4, and sets 1 in the power-on reset flag of the memory 4b. Although the immobilizer 4 is always supplied with power from the power source 6, if the immobilizer 4 is removed from the vehicle for some reason, the power supply from the power source 6 is cut off. When the removed immobilizer 4 or the new immobilizer 4 is attached to the vehicle, the power-on reset circuit 4c outputs a power-on reset signal and sets 1 in the power-on reset flag of the memory 4b. That is, the power-on reset circuit 4c is a circuit that detects that the immobilizer 4 has been removed from the vehicle, and the power-on reset flag in the memory 4b is a flag that stores that the immobilizer 4 has been removed from the vehicle.
[0013]
The engine controller 5 includes a CPU 5a and a memory 5b, and performs engine throttle control, fuel injection control, ignition control, and the like (not shown). In the memory 5b, ID2 unique to the vehicle is stored in advance. The meter unit 7 is a unit in which a speedometer (not shown), an engine tachometer, a fuel meter, and the like are integrally formed, and includes a memory 7a for storing ID3 unique to the vehicle. The audio device 8 is an acoustic device that plays CDs and MDs and receives radio and FM broadcasts, and includes a memory 8a for storing ID3 unique to the vehicle. The navigation device 9 is a device that performs detection of the current position, route search to the destination, route guidance, and the like, and includes a memory 9a for storing ID3 unique to the vehicle.
[0014]
2 and 3 are flowcharts showing an antitheft control program according to an embodiment. The operation of the embodiment will be described with reference to these flowcharts. When the vehicle key 1 is inserted into the ignition key cylinder and set to the ON position or the START position and the ignition switch 10 is turned on, the CPU 4a of the immobilizer 4 starts execution of this antitheft control program.
[0015]
In step 1, the key ID reading device 3 is controlled to read the key ID 1 from the vehicle key 1. In the subsequent step 2, the read key ID1 is collated with a registered ID4 stored in advance in the memory 4b. In step 3, the collation result between the key ID1 and the registered ID4 is confirmed. If they match, the process proceeds to step 4, and if they do not match, the antitheft control is terminated without giving permission to start and continue the engine. To do.
[0016]
If the key ID1 matches the registered ID4, it is checked in step 4 whether 1 is set in the power-on reset flag of the memory 4b. If the power-on reset flag is set to 1, it is determined that the immobilizer 4 has been removed, and ID collation with the effective electrical components 7-9 is performed in steps 5-15. On the other hand, if 1 is not set in the power-on reset flag, it is determined that the immobilizer 4 has not been removed, and the process proceeds to step 16.
[0017]
In step 16, the electrical component ID collation result at the time of the previous engine start stored in the memory 4b is read, and it is confirmed whether or not the previous ID collation result of the effective electrical components 7 to 9 is “mismatch”. If there is no record of removal of the immobilizer 4 in the power-on reset flag and the previous ID verification result of the effective electrical components 7 to 9 is the same, ID verification is not performed again with the effective electrical components 7 to 9 However, it is determined that a sufficiently high anti-theft performance can be secured, and the process proceeds to step 21 in FIG. 3 without performing the ID collation process with the electrical components in steps 5 to 15. On the other hand, although there is no record of removal of the immobilizer 4 in the power-on reset flag, if the previous ID collation result of the effective electrical components 7 to 9 does not match, steps 5 to 15 are performed to ensure high anti-theft performance. Then, ID verification is performed again with the effective electrical components 7-9.
[0018]
When the ID verification with the effective electrical components 7 to 9 is necessary, first, in step 5, the active electrical components 7 to 9 registered in the memory 4b are requested to transmit the ID. In step 6, it is confirmed whether or not there is a response to the ID request from all the effective electrical components 7 to 9 registered in the memory 4b, and if there is a response from all the effective electrical components 7 to 9, the process proceeds to step 7 If no response is received from one of the registered active electrical components 7 to 9, the process proceeds to step 11.
[0019]
If even one of the registered active electrical components 7 to 9 has not responded, the ID request count N of the electrical components stored in the memory 4b is incremented in step 11, and the process proceeds to step 12. In step 12, it is confirmed whether or not the ID request count N for the electrical component has reached a preset determination reference count No. When the determination reference count No is reached, permission to start the engine and continue operation is not given. Terminate the anti-theft control. Here, the determination reference number No is, for example, 4 times. On the other hand, if the ID request count N for the electrical component has not reached the determination reference count No, the process proceeds to step 13 where the responded electrical component is stored in the memory 4b as a valid electrical component and re-registered. Then, it returns to step 5 and repeats the ID collation process of the electrical component mentioned above.
[0020]
If there is a response to the ID request from all the active electrical components 7 to 9 registered in the memory 4b, the ID request count N stored in the memory 4b is cleared to 0 in step 7. In subsequent step 8, it is confirmed whether or not there is a blank ID among the IDs sent from the effective electrical components 7-9. If there is a blank ID, the process proceeds to step 14, where the registered ID 6 stored in the memory 4b is read out and sent to the electrical component that has returned the blank ID, and stored in the memory of the electrical component. And it returns to step 5 and repeats the ID collation process mentioned above with respect to an electrical component.
[0021]
If none of the IDs sent from the effective electrical components 7 to 9 are blank, the process proceeds to step 9 where ID3 sent from each of the effective electrical components 7 to 9 is collated with the registered ID 6 in the memory 4b. In step 10, it is confirmed whether or not the ID3 of all the effective electrical components 7 to 9 matches the registered ID6. If all the ID3 matches the registered ID6, the process proceeds to step 21 in FIG. On the other hand, if any one of the ID3 of the effective electrical components 7 to 9 does not match the registered ID6, the process proceeds to step 15, and the verification result of the mismatch between the electrical component ID3 and the registered ID6 is stored in the memory 4b. The anti-theft control is terminated without giving permission to start and continue operation of the engine.
[0022]
In step 21 of FIG. 3, the engine controller 5 is requested to transmit the engine ID 2, and in the subsequent step 22, the engine ID 2 is checked against the registered ID 5 in the memory 4 b. In step 23, it is confirmed whether or not an ID matching result is obtained. If no matching result is obtained, the antitheft control is terminated without giving permission to start the engine and continue operation. On the other hand, if the engine ID 2 matches the registered ID 5, the process proceeds to step 24, where the power-on reset flag in the memory 4b is reset to 0, and in step 25, an engine start and operation continuation permission signal is sent to the engine controller 5. .
[0023]
In this way, the first ID number ID1 of the vehicle key 1 matches the fourth ID number ID4 of the memory 4b, and the second ID number ID2 of the engine controller 5 is the fifth ID number ID5 of the memory 4b. And when the third ID number ID3 of the electrical components 7 to 9 matches the sixth ID number ID6 of the memory 4b, the engine is started and continued to operate. Can be improved.
[0024]
If the removal of the immobilizer 4 is not stored, the third ID number ID3 of the electrical components 7-9 and the sixth ID number ID6 of the memory 4b are not checked, and both ID numbers match. Therefore, the time required for ID verification can be shortened without deteriorating the anti-theft performance. If the ID mismatch of the electrical components 7-9 is stored in the memory 4b, even if the removal of the immobilizer 4 is not stored, the third ID number ID3 of the electrical components 7-9 is stored. Since the collation with the sixth ID number ID6 of the memory 4b is performed, the anti-theft performance can be improved.
[0025]
When there is an electrical component that cannot be read from the third ID number ID3, the electrical component is excluded from the electrical component subject to ID verification, so that the electrical component is replaced by the vehicle owner. Even in the case of failure of electrical components, the engine can be allowed to start and continue to operate without deteriorating the anti-theft performance. Further, if the third ID number ID3 cannot be read from all the electrical components even if the reading of the third ID number ID3 from a plurality of electrical components is repeated a predetermined number of times N, the engine is started and operated. Since the continuation is not permitted, even if the reading of the ID number from the electrical component fails, it is avoided that the engine start and the continuation of the operation are not immediately permitted. Further, when a blank ID number is read from an electrical component, the sixth ID number ID6 of the memory 4b is sent to the electrical component and stored, so that even when the electrical component is replaced with a new one, A new electrical component can be used as an effective electrical component for ID collation, and the anti-theft performance can be prevented from deteriorating due to the replacement of the electrical component.
[0026]
When the vehicle key is inserted into the key cylinder and turned to the START position, if the engine is started immediately as in the case of a conventional vehicle, an ID verification result will be obtained after the engine is started. If it is obtained, it will immediately disallow subsequent engine operation. On the other hand, when priority is given to ID verification over engine startup, when the vehicle key is inserted into the key cylinder and turned to the START position, ID verification is performed immediately without starting the engine, and an ID matching verification result is obtained. Allow the engine to start if The present invention can be applied to any case where priority is given to engine startup over ID verification, and where ID verification is given priority over engine startup.
[0027]
Further, the type and quantity of the electrical component (effective electrical component) to be subjected to ID verification are not limited to the above-described embodiment. The anti-theft performance can be improved as the number of effective electrical components increases. In order to further improve the anti-theft performance, it is desirable that at least one of the effective electrical components is fixed to the vehicle body so that it cannot be removed.
[0028]
In the above-described embodiment, the power-on reset circuit 4c and the power-on reset flag of the memory 4b have been described as an example of the removal storage means for detecting and storing that the vehicle antitheft device has been removed from the vehicle. The storage means is not limited to the above-described embodiment.
[0029]
In order to further improve the anti-theft performance, ID3 of the electrical component and ID6 stored in the immobilizer may be set to different ID numbers for each electrical component.
[0030]
Furthermore, in the above-described embodiment, an example in which the ID number is wirelessly transmitted from the portable vehicle key to the in-vehicle device is shown. However, the ID number is magnetically recorded on the portable vehicle key, and the ID number is magnetically recorded by the in-vehicle device. Also for a vehicle antitheft device that reads an ID number and a vehicle antitheft device that forms a portable vehicle key with a magnetic card and reads an ID number magnetically recorded on the magnetic card by an in-vehicle device The present invention can be applied, and the effects as described above can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an embodiment.
FIG. 2 is a flowchart illustrating an antitheft control program according to an embodiment;
FIG. 3 is a flowchart illustrating an anti-theft control program according to an embodiment following FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle key 2 Car-mounted apparatus 3 Key ID read-out apparatus 3a Antenna 3b Switch 3c Decoder 4 Immobilizer 4a CPU
4b Memory 4c Power-on reset circuit 5 Engine controller 5a CPU
5b Memory 6 Power supply 7 Meter unit 7a Memory 8 Audio device 8a Memory 9 Navigation device 9a Memory 10 Ignition switch

Claims (7)

A portable vehicle key capable of storing the first ID number and transmitting the first ID number, an engine control device storing the second ID number, and an electrical component storing the third ID number A vehicle antitheft device that collates ID numbers between them and decides whether to start or continue operation of the engine.
Storage means for storing a fourth ID number, a fifth ID number, and a sixth ID number;
ID reading means for reading each ID number from the vehicle key, the engine control device, and the electrical component;
The first ID number of the vehicle key matches the fourth ID number of the storage means, and the second ID number of the engine control device matches the fifth ID number of the storage means, and An antitheft device for vehicles, comprising: an ID verification unit that permits engine start and operation to be continued when a third ID number of the electrical component matches a sixth ID number of the storage unit . The vehicle antitheft device according to claim 1,
A removal storage means for detecting and storing that the vehicle antitheft device has been removed from the vehicle;
The ID collating unit does not collate the third ID number of the electrical component with the sixth ID number of the storage unit when the removal storage unit does not store the removal of the vehicle antitheft device. The vehicle antitheft device, characterized in that both ID numbers coincide with each other. The vehicle antitheft device according to claim 2,
The storage means stores a verification result of the third ID number of the electrical component by the ID verification means and the sixth ID number of the storage means,
In the case where the ID mismatch of the electrical component is stored in the storage unit, the ID collating unit is configured so that the removal of the vehicle antitheft device is not stored in the removal storage unit. The vehicle antitheft device, wherein the third ID number is compared with the sixth ID number of the storage means. In the vehicle antitheft device according to any one of claims 1 to 3,
There are a plurality of the electrical components, and a third ID number is stored in each.
The ID reading means reads a third ID from all the electrical components,
The ID collating means collates the third ID number of each electric component with the sixth ID number of the storage means, and the first ID number of the vehicle key is the fourth ID number of the storage means. And the second ID number of the engine control device matches the fifth ID number of the storage means, and the third ID numbers of all the electrical components are the sixth ID numbers of the storage means. An anti-theft device for a vehicle that permits starting and continuing operation of the engine when the ID number matches. The vehicle antitheft device according to claim 4,
The anti-theft device for vehicles, wherein when there is an electrical component for which the third ID number cannot be read out by the ID reading unit, the ID verification unit excludes the electrical component from the electrical component subject to ID verification . The vehicle antitheft device according to claim 4 or 5,
When the ID collating unit repeats the third ID number read from the plurality of electrical components by the ID reading unit a predetermined number of times, but the third ID number cannot be read from all the electrical components. The vehicle anti-theft device is characterized in that the start and operation of the engine are not permitted. The vehicle antitheft device according to any one of claims 4 to 6,
The ID collating means, when a blank ID number is read from the electrical component by the ID reading means, sends the sixth ID number of the storage means to the electrical component for storage. Anti-theft device for vehicles.

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