JP2003025959A - Theft prevention device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve an enhancement of theft prevention performance. SOLUTION: In the theft prevention device for a vehicle, ID numbers are verified respectively between a portable vehicle key 1 storing a first ID number and capable of transmitting the first ID number, an engine control device 5 storing a second ID number and eleatrical components 7-9 storing a third ID number and permission or non-permission regarding starting and continuing of the operation of an engine is determined. The theft prevention device is provided with a memory means 4b storing a fourth ID number, a fifth ID number and a sixth ID number; ID reading out means 3, 4a for reading out the respective ID numbers from the vehicle key 1, the engine control device 5 and the eleatrical components 7-9; and ID collating means 4 for permitting the starting and continuing of the operation of the engine in the case where the first ID number of the vehicle key 1 is coincident with the fourth ID number of the memory means 4b, the second ID number of the engine control device 5 is coincident with the fifth ID number of the memory means 4b and the third ID number of the eleatrical components 7-9 is coincident with the sixth ID number of the memory means 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing vehicle theft.

[0002]

2. Description of the Related Art When a vehicle key in which an ID number is stored is inserted into an ignition key cylinder and turned, the ID number is collated between the in-vehicle immobilizer and the key, and the ID number of the key is compared with the previously stored ID number. If there is a match, I will be transferred between the immobilizer and engine controller.
There is known a vehicle anti-theft device which performs D number verification and permits starting or continuing operation of an engine when a verification result of ID number matching is obtained (for example, Japanese Patent Laid-Open No. 10-
No. 131568).

[0003]

However, the conventional vehicle antitheft device cannot be said to have sufficient antitheft performance, and further improvement is desired.

An object of the present invention is to improve antitheft performance.

[0005]

Means for Solving the Problems (1) The invention of claim 1 stores a first ID number, a portable vehicle key capable of transmitting the first ID number, and a second ID number. An antitheft device for a vehicle, which compares an ID number between an engine control unit that stores the information and an electrical component that stores a third ID number, and determines whether to permit or deny starting and continuing the operation of the engine. Storage means for storing a fourth ID number, a fifth ID number and a sixth ID number, an ID reading means for reading out the respective ID numbers from the vehicle key, the engine control device and the electrical components, and the vehicle The first ID number of the key matches the fourth ID number of the storage means, and the second ID of the engine control device.
The number matches the fifth ID number of the storage means, and
When the third ID number of the electric component coincides with the sixth ID number of the storage means, an ID collating means for permitting the engine to start and continue the operation is provided, thereby achieving the above object. (2) The vehicle antitheft device according to claim 1 further comprises a removal storage unit that detects and stores that the vehicle antitheft device has been removed from the vehicle, and the vehicle ID antitheft device is stored in the removal storage unit by the ID collating unit. If the removal of No. is not stored, the third ID number of the electrical component and the sixth ID number of the storage unit are not checked, and both ID numbers are considered to match. (3) In the vehicle antitheft device according to claim 3, the storage unit is configured to cause the storage unit to generate a third ID of the electrical component by the ID matching unit.
A comparison result between the number and the sixth ID number in the storage means, and if the ID comparison means stores the ID mismatch of the electrical component in the storage means, the vehicle is stored in the removal storage means. The third ID of the electrical component, even if the removal of the antitheft device is not stored.
The number is collated 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 electric components, each of which stores a third ID number, and the ID reading means outputs the third ID from all the electric components. The third ID number of each of the electrical components is read out, the third ID number of each of the electrical components is compared with the sixth ID number of the storage unit, and the first ID of the vehicle key is read out.
The number 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 the third ID numbers of all the electrical components match the sixth ID number of the storage means. In this case, 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 for which the third ID number cannot be read by the ID reading unit by the ID collating unit, the electronic component is targeted for ID collation. It is designed to be excluded from the parts. (6) In the vehicle antitheft device according to claim 6, even if the ID collating unit repeats reading the third ID number from the plurality of electrical components by the ID reading unit a preset number of times, When the third ID number cannot be read from the electric component, the starting and continuing operation of the engine is prohibited. (7) In the vehicle antitheft device according to claim 7, when a blank ID number is read from the electrical component by the ID reading unit by the ID collating unit, the sixth component of the storage unit is stored in the electrical component. The ID number is sent and stored.

[0006]

(1) According to the invention of claim 1, 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 is the same. It matches the fifth ID number of the storage means and the third electrical component.
Since the engine start and the continuous operation of the engine are permitted when the ID number of No. 1 matches the sixth ID number of the storage means, the antitheft performance can be improved. (2) According to the invention of claim 2, when the removal storage means does not store removal of the vehicle antitheft device,
Since the third ID number of the electrical component and the sixth ID number of the storage unit are not collated and both ID numbers are made to coincide with each other, the time required for the ID collation without deteriorating the antitheft performance. Can be shortened. (3) According to the invention of claim 3, when the storage unit stores the ID mismatch of the electrical component, even when the removal storage unit does not store the removal of the vehicle antitheft device, Since the third ID number of the electrical component is compared with the sixth ID number of the storage means, the antitheft performance can be improved. (4) According to the invention of claim 4, the first I of the vehicle key
The D number matches the fourth ID number of the storage means, and the second ID number of the engine control device is the fifth I number of the storage means.
The third ID of all electrical components that matches the D number
When the number coincides with the sixth ID number of the storage means, starting and continuing operation of the engine are permitted, so that the antitheft performance can be further improved. (5) According to the invention of claim 5, when there is an electrical component whose third ID number cannot be read, the electrical component is
Since D is excluded from the electrical components to be verified, even if the vehicle owner replaces the electrical components or the electrical components fail, the engine start and continue operation will not be impaired without reducing the anti-theft performance. can do. (6) According to the invention of claim 6, when the third ID number cannot be read from all the electrical components even if the reading of the third ID number from the plurality of electrical components is repeated a preset number of times. Makes it impossible to start the engine and continue the operation. Therefore, even if the reading of the ID number from the electrical components fails, it is possible to prevent the engine from immediately starting and continuing the 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 and stored therein. Even if the parts are replaced with new ones, the new electric parts can be used as effective electric parts for ID verification.
It is possible to prevent the anti-theft performance from being deteriorated due to the replacement of electrical components.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of one embodiment. The vehicle antitheft device (vehicle-mounted device) 2 according to the embodiment is
A portable vehicle key 1 that stores a first ID number (hereinafter referred to as ID1) and can wirelessly transmit the ID1, and an engine controller 5 that stores a second ID number (hereinafter referred to as ID2). , The third ID number (hereinafter, referred to as ID3) is compared with the electrical components 7 to 9 that store the third ID number, and the permission or non-permission of starting and continuing the operation of the engine is determined.

The head of the vehicle key 1 has an antenna 1a,
A capacitor 1b and a non-volatile memory 1c are embedded. The antenna 1a receives a signal radio wave of a predetermined frequency transmitted from the key ID reading device 3 of the vehicle-mounted device 2, and the capacitor 1b stores the signal received by the antenna 1a as electric power for ID transmission. A vehicle-specific ID1 is stored in advance in the non-volatile memory 1c, and when the transmission of the signal radio wave from the key ID reading device 3 is completed, the electric power stored in the capacitor 1b is used to extract the key ID reading device 3 from the antenna 1a. ID1 of the memory 1c is transmitted to.

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 is set to an ON position or a START position.

The key ID reading device 3 is installed in the ignition key cylinder and has 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 the immobilizer 4 described later
Sends an ID1 reading command for the vehicle key 1 to the key ID reading device 3. Receiving this command, the key ID reading device 3 switches the switch 3b to the transmission T side, and outputs a signal of a predetermined frequency output from the oscillator 3c for a predetermined time.
It transmits to the vehicle key 1 via the antenna 3a. 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 receiving R side, receives the ID1 transmitted from the vehicle key 1 via the antenna 3a, and the decoder 3d transmits the ID number. It demodulates to and sends to the immobilizer 4.

The immobilizer 4 includes a CPU 4a and a memory 4
b, the power-on reset circuit 4c, etc., and the IDs stored in advance in the vehicle key 1, the engine controller 5, and the electrical components 7 to 9 are collated with the respective registered IDs, and the engine start and the continuous operation of the engine are continued according to the collation result. Decide whether to allow or disallow. The memory 4b is the vehicle key 1
ID1 of the engine controller 5, the ID2 of the engine controller 5 and the ID3 of the electrical components 7 to 9, respectively, which are registered in advance for comparison with a fourth ID number (hereinafter referred to as ID4) and a fifth ID number (hereinafter referred to as ID5). ) And a sixth ID number (hereinafter, referred to as ID6), information of an electric component for which an ID is requested (hereinafter, referred to as valid electrical component), a result of ID collation with valid electrical components 7 to 9, and valid electrical component. ID to 7-9
The number of requests, the power-on reset flag, etc. are stored.

The power-on reset circuit 4c outputs a power-on reset signal when power is supplied from the power supply 6 to the immobilizer 4, and sets 1 in the power-on reset flag of the memory 4b. The immobilizer 4 is always supplied with power from the power supply 6, but if the immobilizer 4 is removed from the vehicle for some reason, the power supply from the power supply 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 to 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 of the memory 4b is a flag that stores that the immobilizer 4 has been removed from the vehicle.

The engine controller 5 has a CPU 5a and a memory 5b, and performs throttle control, fuel injection control, ignition control, etc. of an engine (not shown). The vehicle-specific ID2 is stored in advance in the memory 5b. The meter unit 7 is a unit in which a speedometer, an engine tachometer, a fuel gauge, etc., which are not shown, are integrally formed,
A memory 7a for storing the vehicle-specific ID3 is provided. The audio device 8 is an audio device that plays back CDs and MDs, receives radio and FM broadcasts, and
It has a memory 8a for storing D3. The navigation device 9 is a device that detects the current position, searches for a route to a destination, and guides a route.
It has a memory 9a for storing

2 and 3 are flowcharts showing an antitheft control program according to one embodiment. The operation of one embodiment will be described with reference to these flowcharts.
When the vehicle key 1 is inserted into the ignition key cylinder, the CPU 4a of the immobilizer 4 is in the ON position or START.
When the ignition switch 10 is set to the position and the ignition switch 10 is turned on, execution of this antitheft control program is started.

In step 1, the key ID reading device 3 is controlled to read the key ID1 from the vehicle key 1.
In the subsequent step 2, the read key ID1 is stored in the memory 4b.
The registered ID 4 stored in advance is checked. In step 3, the collation result of the key ID 1 and the registered ID 4 is confirmed. If they match, the process proceeds to step 4. If they do not match, the antitheft control ends without giving permission to start and continue the operation of the engine. To do.

If the key ID1 matches the registration ID4,
At step 4, it is confirmed whether the power-on reset flag of the memory 4b is set to 1. If the power-on reset flag is set to 1, it is determined that the immobilizer 4 has been removed, and step 5
15 to 15 perform ID collation with effective electrical components 7 to 9. On the other hand, if the power-on reset flag is not set to 1, it is determined that the immobilizer 4 has not been removed, and the process proceeds to step 16.

In step 16, the electric component ID collation result at the time of the last engine start stored in the memory 4b is read out, and the previous ID collation result of the effective electric components 7-9 is "
If there is no record of the removal of the immobilizer 4 in the power-on reset flag and the previous ID matching results of the valid electrical components 7 to 9 are the same, the valid electrical components are checked again. 7-9 and ID
It is determined that a sufficiently high anti-theft performance can be secured without performing the collation, and the process proceeds to step 21 in FIG. 3 without performing the ID collating process with the electrical components in steps 5 to 15. On the other hand, if there is no record of the removal of the immobilizer 4 in the power-on reset flag, but if the ID verification results of the previous effective electrical components 7 to 9 are inconsistent, steps 5 to 15 are performed to ensure high antitheft performance. With valid electrical components 7-9 and ID again
Match.

If ID verification with the active electrical components 7-9 is required, first in step 5, the active electrical components 7-9 registered in the memory 4b are requested to transmit their IDs. In step 6, it is confirmed whether or not there is a response to the ID request from all the valid electrical components 7-9 registered in the memory 4b, and if there is a response from all the valid electrical components 7-9, the process proceeds to step 7. If even one of the registered valid electrical components 7 to 9 does not respond, the process proceeds to step 11.

If even one of the registered valid electrical components 7 to 9 does not respond, the step S11 increments the number N of the electrical component ID requests stored in the memory 4b, and the process proceeds to the step 12. move on. In step 12, it is confirmed whether or not the ID request count N for the electric component has reached a preset determination reference count No, and when the ID reference count No has reached the determination reference count No, permission for starting and continuing operation of the engine is not given. Terminate the anti-theft control. Here, the determination reference number No is, for example, four times. On the other hand, when the ID request count N for the electrical component has not reached the determination reference number No, the routine proceeds to step 13, where the responding electrical component is stored in the memory 4b as an effective electrical component and re-registered. After that, the process returns to step 5, and the above-described ID collation processing of the electrical component is repeated.

When all the active electrical components 7 to 9 registered in the memory 4b have responded to the ID request, in step 7, the ID request count N stored in the memory 4b is cleared to zero. In the following step 8,
It is confirmed whether or not there is a blank ID among the IDs sent from the effective electrical components 7 to 9. If there is a blank ID, the process proceeds to step 14, where the registration ID 6 stored in the memory 4b is read and sent to the electrical component that returned the blank ID, and stored in the memory of that electrical component. Then, returning to step 5, the above-mentioned I
The D matching process is repeated.

If there is no blank ID among the IDs sent from the effective electric components 7 to 9, the process proceeds to step 9,
The ID3 sent from each effective electrical component 7-9 is checked against the registered ID6 in the memory 4b. In step 10, it is confirmed whether or not the ID3s of all the effective electrical components 7 to 9 match the registration ID6, and all the ID3s are registered ID6.
If it matches with, the process proceeds to step 21 in FIG. On the other hand, if even one of the IDs 3 of the effective electrical components 7 to 9 does not match the registered ID 6, the process proceeds to step 15, and the matching result of the mismatch of the electrical component ID 3 and the registered ID 6 is stored in the memory 4b. End the anti-theft control without giving permission to start the engine and continue operation.

In step 21 of FIG. 3, the engine controller 5 is requested to send the engine ID2, and in the following step 22, the engine ID2 is collated with the registered ID5 in the memory 4b. In step 23, it is confirmed whether or not the ID matching result is obtained. If the ID matching result is not obtained, the antitheft control is terminated without giving permission to start and continue the operation of the engine. On the other hand, when the engine ID2 matches the registered ID5, the process proceeds to step 24, the power-on reset flag of the memory 4b is reset to 0, and in the following step 25, an engine start and operation continuation permission signal is sent to the engine controller 5. .

As described above, 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 used.
Matches 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 start and the continued operation are permitted, so that the antitheft performance can be improved. .

If the removal of the immobilizer 4 is not stored, the third ID number ID3 of the electrical components 7 to 9 and the sixth ID number ID6 of the memory 4b are not checked and both ID numbers are not checked. Since the IDs are matched, the time required for ID verification can be shortened without deteriorating the anti-theft performance. In addition, the electrical components 7 to the memory 4b
If the ID mismatch of 9 is stored, even if the removal of the immobilizer 4 is not stored,
Since the third ID number ID3 of the electrical components 7 to 9 and the sixth ID number ID6 of the memory 4b are collated,
The anti-theft performance can be improved.

When there is an electrical component from which the third ID number ID3 cannot be read, the electrical component is excluded from the electrical components subject to ID verification. Therefore, the owner of the vehicle replaces the electrical component. In the case where the engine is damaged or the electric component is broken, it is possible to allow the engine to start and continue to operate without deteriorating the anti-theft performance. In addition, if the third ID number ID3 is not read from all the electric components even if the reading of the third ID number ID3 from the plurality of electric components is repeated a preset number of times N, the engine is started and operated. Since the continuation is disallowed, even if the reading of the ID number from the electrical components fails,
Immediate disabling of starting and continuing the engine is avoided. Further, when the blank ID number is read from the electric component, the sixth ID number ID6 of the memory 4b is sent to the electric component to be stored, so that even if the electric component is replaced with a new one. It is possible to use a new electric component as an effective electric component for ID verification, and prevent the antitheft performance from being deteriorated due to replacement of the electric component.

If the engine is started immediately when the vehicle key is inserted into the key cylinder and turned to the START position, as in the case of the conventional vehicle, I is started after the engine is started.
The D collation result is obtained, and when the ID non-coincidence collation result is obtained, immediately after that, the continuation of the operation of the engine is prohibited. On the other hand, if priority is given to ID verification over engine start, when the vehicle key is inserted into the key cylinder and turned to the START position, ID verification is performed without starting the engine immediately and ID verification results are obtained. If it does, the engine is allowed to start. INDUSTRIAL APPLICABILITY The present invention can be applied to both cases of prioritizing engine startup over ID verification and prioritizing ID verification over engine startup.

Further, the type and quantity of the electrical component (effective electrical component) for which ID verification is performed are not limited to those in the above-described embodiment. The greater the number of effective electrical components, the more the anti-theft performance can be improved. In order to further improve the anti-theft performance, it is desirable to fix at least one of the effective electrical components to the vehicle body so that it cannot be removed.

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. However, the removable storage means is not limited to the above-described embodiment.

In order to further improve the anti-theft performance, the electric component ID3 and the ID6 stored in the immobilizer may be different ID numbers for each electric component.

Further, in the above-mentioned one embodiment, an example in which the ID number is wirelessly transmitted from the portable vehicle key to the in-vehicle device has been shown. For a vehicle antitheft device of a type that magnetically reads an ID number by a device, or a vehicle antitheft device of a type that a portable vehicle key is formed by a magnetic card and an ID number magnetically recorded on the magnetic card is read by an in-vehicle device. The invention of the present application can also be applied to the above, and the effects described above can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment.

FIG. 2 is a flowchart showing an antitheft control program according to an embodiment.

FIG. 3 is a flowchart showing the antitheft control program of the embodiment following FIG. 2;

[Explanation of symbols]

1 vehicle key 2 In-vehicle device 3 key ID reading device 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 devices 8a memory 9 Navigation device 9a memory 10 Ignition switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02D 29/02 F02D 29/02 K 45/00 345 45/00 345L 376 376B 376H F02N 11/10 F02N 11 / 10 Z 15/00 15/00 FF Term (Reference) 2E250 AA21 BB08 BB09 BB68 CC10 CC13 CC15 DD03 DD06 EE04 FF23 FF27 FF36 FF44 JJ05 KK03 LL00 SS04 3G084 BA11 BA16 BA28 CA01 DA02 DA28 DA31 EB02 BB02 A02 BB06 A02 BB06 A02 BB06 A02 DF02 EA14 EA15 EC09 FA00 FA29 FB10 GA01 3G093 AA01 BA04 CA01 CB14 DA13 EA05 EA09 EA12 EC01 FA03 FA12

Claims (7)

[Claims] 1. A first ID number for storing a first ID number
A portable vehicle key capable of transmitting a number, an engine control unit that stores a second ID number, and an electrical component that stores a third ID number are collated with each other to verify the ID numbers and start and operate the engine. A vehicle antitheft device for determining whether to permit or disallow continuation, the storage device storing a fourth ID number, a fifth ID number and a sixth ID number, the vehicle key, the engine control device, and ID reading means for reading each ID number from the electrical component, a first ID number of the vehicle key and a fourth ID number of the storage means, and a second of the engine control device
The ID number of the same matches the fifth ID number of the storage means,
The vehicle antitheft device further comprises: ID collating means for permitting start and continued operation of the engine when the third ID number of the electrical component matches the sixth ID number of the storage means. apparatus. 2. The vehicle antitheft device according to claim 1, further comprising: a removal storage unit that detects and stores that the vehicle antitheft device has been removed from the vehicle, wherein the ID collating unit is the removal storage unit. If the removal of the vehicle antitheft device is not stored, the third ID number of the electrical component and the sixth ID number of the storage means are not checked, and both ID numbers are considered to match. Anti-theft device for vehicles characterized by. 3. The vehicle antitheft device according to claim 2, wherein the storage unit compares the third ID number of the electrical component with the sixth ID number of the storage unit by the ID matching unit. The ID collating means stores the I of the electrical component in the storage means.
When D disagreement is stored, even if the removal storage unit does not store removal of the vehicle antitheft device, the third ID number of the electrical component and the sixth storage unit of the storage unit are stored. An anti-theft device for a vehicle, which is characterized by collating with an ID number. 4. The vehicle antitheft device according to claim 1, wherein there are a plurality of the electrical components, and a third ID number is stored in each of the electrical components. Third from all the above electrical components
The ID collating means collates the third ID number of each of the electrical components with the sixth ID number of the storing means, and the first ID number of the vehicle key is stored in the storing means. Fourth I
D number, 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 stored in the storage means. An antitheft device for a vehicle, which permits starting and continuing operation of an engine when the sixth ID number matches. 5. The anti-theft device for a vehicle according to claim 4, wherein the ID collating means includes a third means for reading the ID.
When there is an electric component whose ID number cannot be read, the electric component is excluded from the electric components for which ID verification is performed. 6. The vehicle antitheft device according to claim 4 or 5, wherein the ID collating means sets a predetermined number of times of reading a third ID number from the plurality of electrical components by the ID reading means. If the third ID number cannot be read out from all of the electrical components even after repeating the above, the vehicle antitheft device is characterized in that starting and continuing the operation of the engine is prohibited. 7. The vehicle antitheft device according to any one of claims 4 to 6, wherein the ID collating means reads a blank ID number from the electrical component by the ID reading means. A vehicle antitheft device, characterized in that the sixth ID number of the storage means is sent to the electrical component and stored therein.