JP3722923B2 - Identification code discrimination device in immobility system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an identification code discriminating apparatus in an immobilizer system, and more particularly to speeding up an identification code discriminating process in an immobilizer system that prevents theft of a vehicle.
[0002]
[Prior art]
Conventionally, immobilizer systems have been proposed as devices for preventing theft of automobiles. This immobilizer system has a built-in transponder that oscillates an identification code registered in advance on the grip of the key. The identification code is an extremely complicated code for the purpose of preventing theft, and different identification codes are used for the master key and the spare key corresponding to the same automobile. On the other hand, the vehicle body is equipped with a controller (immobilizer ECU). When a master key or a spare key with a built-in transponder is inserted into the key cylinder, the immobilizer ECU transmits an electromagnetic wave to the transponder from an antenna coil provided in the key cylinder. The transponder uses the electromagnetic energy to oscillate the identification code in the antenna coil. The immobilizer ECU inputs an identification code from the key via the antenna coil, and compares the identification code with the identification codes of the master key and the spare key registered in advance in a predetermined order. For example, the immobilizer ECU first reads and compares the identification code of the master key, and if not matched, reads out and compares the identification code of the spare key. The immobilizer ECU performs comparison in a predetermined order. If both codes match, the engine is allowed to drive. Conversely, if both codes do not match until the end, the engine is not allowed to drive. Yes.
[0003]
In other words, the immobilizer ECU compares the input identification code with several types of pre-registered identification codes in the pre-registered order, so that even the master key and the spare key with different identification codes can be compared and determined reliably. it can.
[0004]
[Problems to be solved by the invention]
By the way, the identification code communicated bidirectionally between the key of the immobilizer system and the immobilizer ECU described above is increasingly complicated in order to improve the anti-theft performance. For example, random number data is included in the electromagnetic wave transmitted from the immobilizer ECU to the key, and the receiving transponder converts the identification code with a function stored in advance using the random number and transmits the converted code to the immobilizer ECU. On the other hand, the immobilizer ECU obtains an identification code by inversely transforming the transmitted identification data transmitted using a function using a random number transmitted to a spare key or the like, and the identification code is based on a master key or a spare key registered in advance. It is compared and determined in order with the identification code of each key registered in advance.
[0005]
However, the time required for such a complicated determination process takes about 100 milliseconds to 200 milliseconds even with only one master key determination process. If there are two spare keys, it takes 1 second to the entire system until the engine is driven. It takes a very long time of 2 seconds. Therefore, there is a problem that the user always feels uncomfortable with the length of time until the engine is driven.
[0006]
The present invention has been made to solve the above-described problems, and its object is to shorten the identification code determination processing time so that a user does not feel uncomfortable in an automobile equipped with an immobilizer system. It is an object of the present invention to provide an identification code discriminating apparatus in an immobility system.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, first storage means for storing in advance an identification code having the same content as an identification code different from each other transmitted from a plurality of transmission means, respectively, as an in-vehicle side identification code, and the first storage When the second storage means storing the reading order of the plurality of in-vehicle identification codes stored by the means and the identification code transmitted from any one of the plurality of transmitting means are received, the second According to the reading order stored in the storage unit, the vehicle-mounted side identification code stored in the first storage unit is read, and compared with the identification code, it is determined that the code determination unit and the code determination unit match. And a control means for generating an engine drive permission signal for enabling control of the engine, and the next reading order is stored in the second storage means. It is summarized in that with a Rushokomi means.
[0008]
According to a second aspect of the present invention, in the identification code discriminating apparatus in the immobilizer system according to the first aspect, when the writing unit determines that the code discriminating unit is coincident, the coincidence vehicle-side identification code is read next time. The gist is to specify the first vehicle-mounted side identification code in the order and store it in the second storage means.
[0009]
According to a third aspect of the present invention, in the identification code discriminating apparatus in the immobilizer system according to the first aspect, the plurality of transmission means transmit a second identification code for opening a door, which is different from each other. A third storage unit that stores in advance an identification code having the same content as the identification code as a second vehicle-mounted side identification code; and a second identification code transmitted from any one of the plurality of transmission units A second code determining means for comparing the second identification code with the second vehicle-mounted side identification code stored in the third storage means to determine whether or not they match, and the second code When it is determined that the determination means match, the second control means for generating a door lock release signal for releasing the door lock and the second code determination means match, and it is determined that they match. A second on-vehicle side identification code stored in the first storage means of the transmission means corresponding to the second on-vehicle side identification code is designated as the first on-vehicle side identification code in the reading order and stored in the second storage means Writing means and
The gist is that
[0010]
According to the first aspect of the present invention, the code discriminating unit reads the vehicle-mounted side identification code stored in the first storage unit in accordance with the reading order stored in the second storage unit, and the identification code transmitted from the transmission unit and Compare and determine whether they match. When it is determined that the code determination means match, the control means generates an engine drive permission signal for enabling control of the engine. Therefore, for example, when only one transmission means is always used among a plurality of transmission means, the vehicle-mounted identification code for the identification code of only one transmission means is the first comparison target. If the writing means is stored in the second storage means, the determination processing operation by the code determination means is completed once. As a result, the discrimination process of the code discrimination means is completed in a short time.
[0011]
According to the second aspect of the present invention, the writing means writes the in-vehicle side identification code of the transmitting means having the highest probability of being used next to the second storage means. As a result, the discrimination process by the code discrimination means has a high probability of being completed once, and can be completed in a short time.
[0012]
According to the third aspect of the present invention, when the second code discriminating unit discriminates the transmitting unit used for releasing the door lock, the second writing unit stores it in the first storage unit of the transmitting unit. The in-vehicle side identification code thus designated is designated as the first in-vehicle side identification code in the reading order and stored in the second storage means. That is, the transmission means used to open the door has the highest probability of being used for engine startup. Accordingly, the discrimination processing operation by the code discrimination means has a high probability of being completed at a time, and can be completed in a short time.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
[0014]
FIG. 1 is a block diagram showing an immobilizer system for an automobile. The immobilizer system includes an automobile 1, a master key 2, and two spare keys 3 and 4 indicated by broken lines in FIG. The automobile 1 includes an immobilizer ECU 5, a transceiver 6, a sensor 7, and a fuel injection control device (EFI ECU) 8.
[0015]
The immobilizer ECU 5 is connected to the transmitter / receiver 6 and outputs a signal including the random number α to the transmitter / receiver 6 and an immobilizer code signal via the transmitter / receiver 6. The transceiver 6 comprises an amplifier 6a and an antenna coil 6b disposed on the outer periphery of the key cylinder. The amplifier 6a converts the signal from the immobilizer ECU 5 into an electromagnetic wave from the antenna coil 6b and transmits it to the antenna coil of the transponders 2a, 3a, 4a of the keys 2, 3, 4 inserted into a key cylinder (not shown). It has become. The immobilizer ECU 5 is connected to the EFIECU 8 and outputs an engine drive permission signal EA described later to the EFIECU 8.
[0016]
The master key 2 has a transponder 2a built in the grip portion. The spare key 3 has a transponder 3a built in the grip portion. The spare key 4 has a transponder 4a built in the grip portion. The transponders 2a, 3a, and 4a include central processing units (CPUs) 2b, 3b, and 4b, EEPROMs 2c, 3c, and 4c, and an antenna coil (not shown).
[0017]
The EEPROM 2c stores in advance the key side encryption code 30 of the master key 2 in addition to the control program of the CPU 2b. As shown in FIG. 2, the key-side encryption code 30 includes a data processing code 30a and a fixed code 30b. The data processing code 30a is configured as a 40-bit function in the present embodiment, and the fixed code 30b is configured with 8 bits in the present embodiment.
[0018]
The CPU 2b executes a key side identification code generation process in accordance with a control program stored in the EEPROM 2c. The CPU 2b is executed based on a signal including the random number α.
[0019]
The CPU 2b reads the data processing code 30a constituting the key side encryption code 30, and generates a 40-bit encryption code 30c. The encryption code 30c is created by the CPU 2b using the value of the random number α from the immobilizer ECU 5 at that time. More specifically, this random number α is substituted into a data processing code 30a as a 40-bit function and processed into a 40-bit encryption code 30c. Accordingly, the encryption code 30c having a different value is processed depending on the value of the random number at that time.
[0020]
Next, the CPU 2b reads the created encryption code 30c and the fixed code 30b of the key-side encryption code 30, and synthesizes both the codes 30c and 30b to create the key-side identification code IDk0 of the master key 2. That is, as shown in FIG. 2, in this embodiment, the key side identification code IDk0 of the master key 2 is composed of 48 bits, the lower 8 bits are composed of the fixed code 30b, and the upper 40 bits are processed. The encryption code 30c is used. Then, the CPU 2b transmits the created key side identification code IDk0 of the master key 2 to the antenna coil 6b on the immobilizer ECU 5 side through its own antenna coil.
[0021]
Note that the transponders 3a and 4a of the other spare keys 3 and 4 have the same configuration, and each EEPROM 3c and 4c has a key-side encryption code composed of data processing codes 31a and 32a and fixed codes 31b and 32b. 31 and 32 are stored in advance. Then, the CPUs 3b and 4b create encryption codes 31c and 32c from the data processing codes 31a and 32a, synthesize the encryption codes 31c and 32c and the fixed codes 31b and 32b, and identify the key sides of the spare keys 3 and 4, respectively. Codes IDk1 and IDk2 are created and transmitted. In the present embodiment, the data processing codes 30a to 32a and the fixed codes 30b to 32b of the key side encryption codes 30 to 32 are set to different values for each key.
[0022]
The immobilizer ECU 5 includes a central processing unit (CPU) 5a, a ROM 5b, a RAM 5c, and an input / output interface 5d. In addition to the control program, the ROM 5b includes an immobilizer encryption code 40 for the master key 2, an immobilizer encryption code 41 for the first spare key 3, and an immobilizer encryption code 42 for the second spare key 4. It is remembered. The immobilizer side encryption code 40 of the master key 2 is set to a value that matches the key side encryption code 30 of the master key 2 described above. Further, the immobilizer side encryption code 41 of the first spare key 3 is set to a value coincident with the key side encryption code 31 of the first spare key 3, and the immobilizer side encryption code 42 of the second spare key 4 is Values corresponding to the key-side encryption code 32 of the second spare key 4 are set.
[0023]
Therefore, each immobilizer side encryption code 40-42 is similarly composed of data processing codes 40a-42a and fixed codes 40b-42b as shown in FIG. The data processing codes 40a to 42a are composed of 40 bits in this embodiment, and the fixed codes 40b to 42b are composed of 8 bits in this embodiment.
[0024]
The CPU 5a executes immobility side identification code creation processing, code determination processing, and immobility system release processing in accordance with a control program stored in the ROM 5b. The CPU 5a is connected to a sensor 7 that detects whether or not a key provided in the key cylinder is inserted, and each process is executed based on the detection signal. In the present embodiment, when the sensor 7 detects that a key is inserted into the key cylinder, an electromagnetic wave including a randomly set random number α is transmitted to the transponder of the key, and the previously used key is immobilized. An identification code creation process is executed, and then a code determination process is executed. The RAM 5c temporarily stores the key (one of the master key 2, the spare key 3, and the spare key 4) that was inserted into the key cylinder last time and the arithmetic processing result of the CPU 5a. The key used can be known.
[0025]
The immobility side identification code creation processing refers to a processing operation for creating immobility side identification codes IDi0 to IDi2 for the keys 2 to 4 using the respective immobility side encryption codes 40 to 42 stored in the ROM 5b.
[0026]
When the previously used key (one of the master key 2, the spare key 3, and the spare key 4) is, for example, the master key 2, the CPU 5a first searches for the previously used key stored in the RAM 5c, and the key Is determined to be the master key 2, the immobilizer side identification code creating process is executed for the master key 2. In this immobility side identification code creation process, the CPU 5a reads the data processing code 40a constituting the immobility side encryption code 40 of the master key 2 and generates a 40-bit encryption code 40c. The encryption code 40c is generated using the same random number α as the random number α transmitted to the transponder 2a of the key 2 into which the CPU 5a is inserted. More specifically, this random number α is substituted into a data processing code 40a as a 40-bit function and processed into a 40-bit encryption code 40c. Accordingly, the encryption code 40c having a different value is processed depending on the value of the random number α at that time.
[0027]
Next, the CPU 5a reads the generated encryption code 40c and the fixed code 40b of the immobilizer side encrypted code 40, and synthesizes both the codes 40c and 40b to generate the immobilizer identification code IDi0. That is, as shown in FIG. 3, in this embodiment, the immobility side identification code IDi0 is composed of 48 bits, the lower 8 bits are composed of the fixed code 40b, and the upper 40 bits are composed of the encryption code 40c. It has come to be. Then, the CPU 5a stores the created immobilizer side identification code IDi0 of the master key 2 in the RAM 5c, and ends the immobilizer identification code creation process of the master key 2. If the previously used key is the spare key 3, similarly, the immobilizer identification code IDi1 is generated by executing the immobilizer identification code preferentially for the spare key 3. If the previously used key is the spare key 4, similarly, the immobilizer identification code creation process is executed preferentially for the spare key 4, and the immobilizer identification code IDi2 is created.
[0028]
Accordingly, the key-side identification codes IDk0 to IDk2 and the immobility-side identification codes IDi0 to IDi2 obtained from the key-side encryption codes 30 to 32 and the immobilizer-side encryption codes 40 to 42 using the same random number α are respectively The key-side identification code IDk0 and the immobilizer-side identification code IDi0, the key-side identification code IDk1 and the immobilizer-side identification code IDi1, and the key-side identification code IDk2 and the immobilizer-side identification code IDi2 are values that match.
[0029]
When the immobility identification code creation process for the key used last time is completed, the mode shifts to the code determination process for the key. The code discrimination processing compares the immobility side identification codes IDi0 to IDi2 created in the previous immobilization side identification code creation processing with the key side identification codes IDk0 to IDk2 transmitted from the keys 2 to 4 inserted into the key cylinder. The process of determining whether or not they match.
[0030]
When the key used last time is, for example, the master key 2 and the key inserted into the key cylinder this time is the master key 2, the CPU 5a transmits a random number α and the immobilizer side identification code IDi0 of the master key 2 created, and the transceiver 6 The key-side identification code IDk0 input from is compared. If it is determined in this code discrimination process that both codes IDi0 and IDk0 match, the CPU 5a shifts to an immobilization system cancellation process described later, and stores in the RAM 5c that the last used key is the master key 2. deep.
[0031]
If the previously used key is, for example, the master key 2 and the key inserted into the key cylinder this time is the spare key 3, the CPU 5a inputs the immobilizer side identification code IDi0 created for the previously used master key 2 as described above. The key side identification code IDk1 of the spare key 3 is compared. If it is determined in this code discrimination process that the codes IDi0 and IDk1 do not match, the CPU 5a immediately performs the immobilization side identification code creation process for the spare key 3 and creates the immobilization side identification code IDi1 of the spare key 3. Then, the code identification process is executed for the key identification code IDk1 of the spare key 3 that has been input and the immobilization identification code IDi1 that has been input. In addition to the process, the fact that the last used key is the spare key 3 is stored in the RAM 5c.
[0032]
Further, when the previously used key is, for example, the master key 2 and the key inserted into the key cylinder this time is the spare key 4, the CPU 5a inputs the immobilizer side identification code IDi0 created for the previously used master key 2 as described above. The key side identification code IDk2 of the spare key 3 is compared. If the CPU 5a determines that the codes IDi0 and IDk2 do not match in this code discrimination process, the CPU 5a immediately performs the immobilizer side identification code creation process for the spare key 3 and creates the immobilizer side identification code IDi1 of the spare key 3. Then, the code identification process is executed for the key identification code IDk2 of the input spare key 4 and the immobilization identification code IDi1 that has been input. If it is determined in the code identification process that the codes IDi1 and IDk2 do not match, the CPU 5a immediately uses the spare key. The immobilizer side identification code creating process for No. 4 is performed, and the immobilizer side identification code IDi2 of the spare key 4 is created. Then, the code identification process is executed for the key identification code IDk2 of the spare key 4 that has been input and the immobilization identification code IDi2 that has been input. If it is determined that the codes IDi2 and IDk2 match in this code identification process, the CPU 5a releases the immobilization system In addition to the process, the fact that the last key used is the spare key 4 is stored in the RAM 5c.
[0033]
Furthermore, when the key used last time is, for example, the master key 2 and the key inserted into the key cylinder this time is not the keys 2, 3 and 4 registered in the ROM 5b in advance, the CPU 5a first uses the last time as described above. The code determination process for the master key 2, the code determination process for the spare key 3, and the code determination process for the spare key 4 are executed next. If it is determined that they all do not match, the CPU 5 a does not shift to the immobilization system release process.
[0034]
When the CPU 5a shifts to the immobilizer system release process, it continues to output the engine drive permission signal EA to the fuel injection control device (EFIECU) 8 until the keys 2, 3 and 4 are removed from the key cylinder.
[0035]
The EFIECU 8 includes a central processing unit (CPU) 8a, a ROM 8b, a RAM 8c, an input / output interface 8d, and the like. The CPU 8a starts and controls the engine according to a control program stored in the ROM 8b, and executes various calculation processes for calculating the injection amount and injection timing of fuel supplied to the engine and controlling the drive of the engine. Yes. The RAM 8c temporarily stores the calculation processing result of the CPU 8a.
[0036]
When the engine drive permission signal EA is output from the immobilizer ECU 5, the CPU 8a calculates the injection amount and the injection timing of the fuel supplied to the engine in response to an ON signal of an ignition key switch (not shown), and controls the drive of the engine. The arithmetic processing for performing is performed. Further, when the engine drive permission signal EA is not output from the immobilizer ECU 5, the CPU 8a does not execute the arithmetic processing for controlling the driving of the engine even when an ON signal of an ignition key switch (not shown) is input. . That is, when the engine drive permission signal EA is not output from the immobilizer ECU 5, the engine is not driven and the automobile 1 does not move.
[0037]
Next, the operation in the code discrimination process of the ID code processing system of the immobilizer system configured as described above will be described with reference to the flowchart shown in FIG.
For example, if the previously used key is the spare key 3, when the user inserts the spare key 3 into the key cylinder, the sensor 7 senses it and outputs the information to the immobilizer ECU 5. When the CPU 5a of the immobilizer ECU 5 inputs the information through the input / output interface 5d in Step 1, the CPU 5a moves to Step 2, outputs a signal including the random number α to the transceiver 6, and stores it in the RAM 5c in Step 3. The immobilizer side identification code creation process is performed on the spare key 3 which is the previously used key, and the immobilizer identification code IDi1 of the spare key 3 is created. On the other hand, when the transponder 3a of the spare key 3 receives an electromagnetic wave including the random number α through its antenna coil in step 11, the key side identification code IDk1 is created in step 12 by performing key side identification code creation processing. When the key side identification code IDk1 is created, the transponder 3a oscillates the code IDk1 from its own antenna coil to the antenna coil 6b of the transceiver 6 in step 13.
[0038]
When the CPU 5a inputs the key side identification code IDk1 from the transmitter / receiver 6 in step 4, the CPU 5a moves to step 5 and performs code discrimination processing for the spare key 3 used last time. That is, in step 5, the created immobilizer side identification code IDi1 is compared with the input key side identification code IDk1. When it is determined that the codes IDi1 and IDk1 coincide with each other, the CPU 5a immediately outputs an engine drive permission signal EA to the EFIECU 8 at step 6 and at step 7 stores data indicating what key was used at that time in the RAM 5c. To remember.
[0039]
If it is determined in step 5 that the two codes do not match, the CPU 5a immediately determines in step 8 whether there is a key that has not been subjected to code generation processing. Then, an immobilizer side identification code creation process is performed for the key, and both codes are compared in step 5. If it is determined in step 8 that code creation processing has been performed for all keys, the keys are determined to be inconsistent.
[0040]
When the engine drive permission signal EA is input, the CPU 8a of the EFIECU 8 executes various arithmetic processes for controlling the drive of the engine in response to the ON signal of the ignition key switch. That is, this system first determines whether or not the input key side identification code is correct for the key used last time.
[0041]
Next, features of the present embodiment configured as described above will be described below.
(1) In this embodiment, the RAM 5c of the immobilizer ECU 5 stores the previously used key (one of the master key 2, the spare key 3, and the spare key 4), and the input key side identification code is When determining whether or not it is correct, first, the immobilizer side identification code creation process is preferentially performed for the previously used key, and the code determination process is performed. Therefore, when the same key is repeatedly used, it can be determined that the key side identification codes IDk0, IDk1, and IDk2 are correct in a short time.
[0042]
(2) In the present embodiment, the immobilizer ECU 5 outputs a transmission signal including the random number α to the transceiver 6 and performs immobilizer-side identification code generation processing for the previously used key stored in the RAM 5c, for example, the master key 2. Then, the immobilizer side identification code IDi0 of the master key 2 is created. Accordingly, since the immobilizer side identification code IDi0 can be created for the previously used key before the key side identification code IDk0 from the master key 2 is input, the code determination when the same key is used repeatedly is determined. The treatment can be performed in an extremely short time.
[0043]
(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a block diagram showing an immobilization system of a car. The immobilizer system includes an automobile 11, a master key 12, and two spare keys 13, 14 indicated by broken lines in FIG.
[0044]
The automobile 11 includes an immobilizer ECU 15, a transceiver 16, a sensor 17, a fuel injection control device (EFI ECU) 18, a radio wave key receiver 19, a door lock device D, and the like.
[0045]
The immobilizer ECU 15 is connected to the transmitter / receiver 16, and outputs a signal including the random number α to the transmitter / receiver 16 and inputs an immobilizer code signal via the transmitter / receiver 16. The transceiver 16 includes an amplifier 16a and an antenna coil 16b disposed on the outer periphery of the key cylinder. The amplifier 16a converts the signal from the immobilizer ECU 15 and converts it into an electromagnetic wave from the antenna coil 16b and transmits it to the antenna coil of the transponders 12a, 13a, 14a of the keys 12, 13, 14 inserted into a key cylinder (not shown). ing. The immobilizer ECU 5 is connected to the EFIECU 18 and outputs an engine drive permission signal EA to the EFIECU 18 as in the first embodiment. The radio wave key receiver 19 is connected to the door lock device D, and outputs a control signal to the door lock device D based on the received radio wave. The radio wave key receiver 19 is connected to the immobilizer ECU 15 and outputs a key recognition signal to be described later to the immobilizer ECU 15 based on the received radio wave.
[0046]
The master key 12 has a transponder 12a built in the grip portion. The spare key 13 has a transponder 13a built in the grip portion. The spare key 14 has a transponder 14a built in the grip portion. Each of the transponders 12a, 13a, and 14a includes a central processing unit (CPU) 12b, 13b, and 14b, EEPROMs 12c, 13c, and 14c, and an antenna coil (not shown). The master key 12 includes a door lock on switch 12d and a door lock off switch 12e in the grip portion. The spare key 13 includes a door lock on switch 13d and a door lock off switch 13e in the grip portion. The spare key 14 includes a door lock on switch 14d and a door lock off switch 14e in the grip portion. Further, the master key 12, the spare key 13, and the spare key 14 are each provided with a transmitter (not shown) that oscillates each signal based on each switch operation.
[0047]
The EEPROM 12c stores in advance the key side encryption code 50 of the master key 12 in addition to the control program of the CPU 12b. As shown in FIG. 6, the key-side encryption code 50 includes a data processing code 50a and a fixed code 50b. The data processing code 50a is configured as a 40-bit function in the present embodiment, and the fixed code 50b is configured with 8 bits in the present embodiment.
[0048]
The CPU 12b executes key side identification code generation processing in accordance with a control program stored in the EEPROM 12c. The CPU 12b is executed based on a signal including the random number α.
[0049]
The CPU 12b reads the data processing code 50a constituting the key side encryption code 50 and generates a 40-bit encryption code 50c. The creation of the encryption code 50c is performed by the CPU 12b by the value of the random number α from the immobilizer ECU 15 at that time in the same manner as in the first embodiment.
[0050]
Then, the CPU 12b reads the created encryption code 50c and the fixed code 50b of the key-side encryption code 50, and synthesizes both the codes 50c and 50b to create the key-side identification code IDk3 of the master key 12 as shown in FIG. Then, the CPU 12b transmits the created key side identification code IDk3 of the master key 12 to the antenna coil 16b on the immobilizer ECU 15 side through its own antenna coil.
[0051]
The transponders 13a and 14a of the other spare keys 13 and 14 have the same configuration, and each EEPROM 13c and 14c has a key-side encryption code composed of a data processing code 51a and 52a and a fixed code 51b and 52b. 51 and 52 are stored in advance. Then, the CPUs 13b and 14b create encryption codes 51c and 52c from the data processing codes 51a and 52a, synthesize the encryption codes 51c and 52c and the fixed codes 51b and 52b, and identify the key sides of the spare keys 13 and 14, respectively. Codes IDk4 and IDk5 are created and transmitted. In the present embodiment, the data processing codes 50a to 52a and the fixed codes 50b to 52b of the key side encryption codes 50 to 52 are set to different values for each key.
[0052]
When the door lock on switch 12d of the master key 12 is pushed, the master key 12 oscillates a lock on signal 12X to the radio wave key receiver 19, and when the door lock off switch 12e is pushed, the master key 12 sends a lock off signal 12Y to the radio key receiver 19. Oscillates. When the door lock on switch 13d of the spare key 13 is pushed, the spare key 13 oscillates a lock on signal 13X to the radio wave key receiver 19, and when the door lock off switch 13e is pushed, the spare key 13 sends a lock off signal 13Y to the radio key receiver 19. Oscillates. When the door lock on switch 14d of the spare key 14 is pushed, the spare key 14 oscillates a lock on signal 14X to the radio wave key receiver 19, and when the door lock off switch 14e is pushed, the spare key 14 sends a lock off signal 14Y to the radio key receiver 19. Oscillates. The lock-on signals 12X, 13X, and 14X are signals for locking the door. The lock-off signals 12Y, 13Y, and 14Y are signals for releasing the door lock. For each signal, it is determined which of the master key 12, the spare key 13, and the spare key 14 is oscillated. Key identification code is included so that you can.
[0053]
The radio wave key receiver 19 includes a central processing unit (CPU) 19a, a ROM 19b, a RAM 19c, an input / output interface 19d, a receiver 19e, and the like. The CPU 19a executes various arithmetic processes such as a signal discrimination process in accordance with a control program stored in the ROM 19b. In addition to the control program, the ROM 19b stores various data such as a key identification code registered in advance for each key. The RAM 19c temporarily stores the calculation processing result of the CPU 19a.
[0054]
The CPU 19a receives lock-on signals 12X, 13X, and 14X and lock-off signals 12Y, 13Y, and 14Y transmitted from the keys 12, 13, and 14 via the receiver 19e. When the CPU 19a receives these signals, the CPU 19a executes signal discrimination processing. In the signal discrimination process, if the input signal is a lock-on signal 12X, 13X, or 14X, the CPU 19a outputs a control signal for locking the door to the door lock device D to lock the door.
[0055]
If the input signal is the lock-off signal 12Y, the CPU 19a outputs a control signal for unlocking the door to the door lock device D to release the door lock, and at the same time the master key 12 from the key identification code included in the lock-off signal 12Y. The key identification signal 12Z is output to the immobilizer ECU 15. If the input signal is the lock-off signal 13Y, the CPU 19a outputs a control signal for releasing the door lock to the door lock device D to release the door lock, and the spare key 13 from the key identification code included in the lock-off signal 13Y. And the key identification signal 13Z is output to the immobilizer ECU 15. If the input signal is the lock-off signal 14Y, the CPU 19a outputs a control signal for unlocking the door to the door lock device D to release the door lock, and the spare key 14 from the key identification code included in the lock-off signal 14Y. The key identification signal 14Z is output to the immobilizer ECU 15. The key identification signals 12Z to 14Z are signals indicating which of the keys 12 to 14 is used to open the door.
[0056]
The immobilizer ECU 15 includes a central processing unit (CPU) 15a, a ROM 15b, a RAM 15c, an input / output interface 15d, and the like. In addition to the control program, the ROM 15b stores in advance an immobilizer encryption code 60 for the master key 12, an immobilizer encryption code 61 for the first spare key 13, and an immobilizer encryption code 62 for the spare key 14. . The RAM 15c temporarily stores the key identification signals 12Z to 14Z from the radio wave key receiver 19 and the calculation processing result of the CPU 15a. The immobilizer encryption code 60 of the master key 12 is set to a value that matches the key encryption code 50 of the master key 12 described above. In addition, the immobilization side encryption code 61 of the first spare key 13 is set to a value that matches the key side encryption code 51 of the first spare key 13, and the immobilization side encryption code 62 of the second spare key 14 is Values corresponding to the key-side encryption code 52 of the second spare key 14 are set.
[0057]
Accordingly, the immobilizer-side encrypted codes 60 to 62 are similarly composed of data processing codes 60a to 62a and fixed codes 60b to 62b as shown in FIG. The data processing codes 60a to 62a are composed of 40 bits in the present embodiment, and the fixed codes 60b to 62b are composed of 8 bits in the present embodiment.
The CPU 15a executes immobility side identification code creation processing, code determination processing, and immobility system release processing according to a control program stored in the ROM 15b. The CPU 15a is connected to a sensor 17 that detects whether or not a key provided in the key cylinder is inserted, and each process is executed based on the detection signal. In the present embodiment, when the sensor 17 detects that a key has been inserted into the key cylinder, an electromagnetic wave including a randomly set random number α is transmitted to the transponder of the key, and at the time of getting on the automobile 11 The immobilizer side identification code creating process is executed for the key that opened the door, and then the code determining process is executed.
[0058]
The immobility side identification code creation processing refers to a processing operation for creating immobility side identification codes IDi3 to IDi5 for the keys 12 to 14 using the respective immobility side encryption codes 60 to 62 stored in the ROM 15b.
[0059]
When the key (one of the master key 12, the spare key 13, and the spare key 14) that opens the door by radio waves when boarding is, for example, the master key 12, the CPU 15a first opens the door stored in the RAM 15c. If it is determined that the key is the master key 12, the immobilizer side identification code creating process is executed for the master key 12. In this immobility side identification code creation process, the CPU 15a reads the data processing code 60a constituting the immobility side encryption code 60 of the master key 12 and generates a 40-bit encryption code 60c. The encryption code 60c is created by using the same random number α as the random number α transmitted to the transponder 12a of the key 12 into which the CPU 15a is inserted in the same manner as in the first embodiment.
[0060]
Then, the CPU 15a reads the generated encryption code 60c and the fixed code 60b of the immobilizer side encrypted code 60, and combines both the codes 60c and 60b to generate the immobilizer identification code IDi3 as shown in FIG. Then, the CPU 15a stores the created immobilizer identification code IDi3 of the master key 12 in the RAM 15c, and ends the immobilizer identification code creation process of the master key 12. If the key whose door is opened by radio waves is the spare key 13, similarly, the immobilizer side identification code IDi4 is created by preferentially executing the immobilizer identification code for the spare key 13. If the key whose door is opened by the radio wave is the spare key 14, similarly, the immobilizer identification code IDi5 is generated by preferentially executing the immobilizer identification code for the spare key 14.
[0061]
Accordingly, the key-side identification codes IDk3 to IDk5 and the immobilization-side identification codes IDi3 to IDi5 obtained from the key-side encryption codes 50 to 52 and the immobilizer-side encryption codes 60 to 62 using the same random number α are respectively The key side identification code IDk3 and the immobilizer side identification code IDi3, the key side identification code IDk4 and the immobilizer side identification code IDi4, and the key side identification code IDk5 and the immobilizer side identification code IDi5 are values that match.
[0062]
When the immobility side identification code creating process for the key whose door is opened by the radio wave is completed, the mode shifts to the code determining process for the key. The code discrimination processing compares the immobility side identification codes IDi3 to IDi5 created in the previous immobilization side identification code creation processing with the key side identification codes IDk3 to IDk5 transmitted from the keys 12 to 14 inserted into the key cylinder. The process of determining whether or not they match.
[0063]
When the key that opens the door by radio waves is, for example, the master key 12 and the master key 12 is inserted into the key cylinder, the CPU 15a transmits a random number α and the immobilization side identification code IDi3 of the master key 12 that is created, and the transceiver 16 The key side identification code IDk3 input from is compared. If it is determined in this code determination process that both codes IDi3 and IDk3 match, the CPU 15a shifts to an immobilization system cancellation process described later.
[0064]
If the key that opens the door by radio waves is used, for example, the master key 12 is used, and the key inserted in the key cylinder is the spare key 13, the CPU 15a creates the master key 12 created for the master key 12 that opens the door by radio waves as described above. The identification code IDi3 is compared with the key-side identification code IDk4 of the input spare key 13. If the CPU 15a determines that the codes IDi3 and IDk4 do not coincide with each other in this code discrimination process, the CPU 15a immediately performs the immobilizer side identification code creation process for the spare key 13 to create the immobilizer side identification code IDi4 of the spare key 13. Then, the code identification process is executed for the key identification code IDk4 of the input spare key 13 and the generated immobilization identification code IDi4. If it is determined that the codes IDi4 and IDk4 match in this code identification process, the CPU 15a cancels the immobilization system. Transition to processing.
[0065]
Further, when the key that opens the door by radio waves is used, for example, the master key 12 is used, and the key inserted into the key cylinder is the spare key 14, the CPU 15a creates the immobilizer side created for the master key 12 that opens the door by radio waves as described above. The identification code IDi3 is compared with the input side key identification code IDk5 of the spare key 13. If it is determined that the codes IDi3 and IDk5 do not match in this code determination process, the CPU 15a immediately performs the immobilization side identification code creation process for the spare key 13 and creates the immobilization identification code IDi4 of the spare key 13. Then, the code identification process is executed for the generated immobilizer identification code IDi4 and the key identification code IDk5 of the input spare key 14, and if it is determined that the codes IDi4 and IDk5 do not match in this code identification process, the CPU 15a immediately uses the spare key. The immobilizer side identification code creating process is performed for 14 and the immobilizer side identification code IDi5 of the spare key 14 is created. Then, the code identification process is executed for the key identification code IDk5 of the spare key 14 that has been input and the immobilization identification code IDi5 that has been input. If it is determined that the codes IDi5 and IDk5 match, the CPU 15a cancels the immobilization system. Transition to processing.
[0066]
Further, when the key that opens the door by radio waves is used, for example, the master key 12 is used, and the key inserted into the key cylinder is not the keys 12, 13, and 14 registered in the ROM 15b in advance, the CPU 15a first executes the previous time as described above. The code determination process for the master key 12 that has opened the door by radio waves, the code determination process for the spare key 13, and the code determination process for the spare key 14 are then executed. If it is determined that they all do not match, the CPU 15a cancels the immobilization system. Do not move on to processing.
[0067]
When the CPU 15a shifts to the immobilization system release process, it continues to output the engine drive permission signal EA to the fuel injection control device (EFI ECU) 18 until the keys 12, 13, and 14 are removed from the key cylinder.
[0068]
The EFIECU 18 includes a central processing unit (CPU) 18a, a ROM 18b, a RAM 18c, an input / output interface 18d, and the like. The CPU 18a starts and controls the engine according to a control program stored in the ROM 18b, and executes various arithmetic processes for calculating the injection amount and injection timing of fuel supplied to the engine and controlling the driving of the engine. Yes. The RAM 18c temporarily stores the calculation processing result of the CPU 18a.
[0069]
When the engine drive permission signal EA is output from the immobilizer ECU 15, the CPU 18a calculates the injection amount and the injection timing of the fuel to be supplied to the engine in response to an ON signal of an ignition key switch (not shown), and drives the engine. The arithmetic processing for performing is performed. In addition, when the engine drive permission signal EA is not output from the immobilizer ECU 15, the CPU 18a does not execute the arithmetic processing for controlling the driving of the engine even if an ON signal of an ignition key switch (not shown) is input. . That is, when the engine drive permission signal EA is not output from the immobilizer ECU 15, the engine is not driven and the automobile 11 does not move.
[0070]
Next, the operation in the code discrimination process of the ID code processing system of the immobilizer system configured as described above will be described with reference to the flowchart shown in FIG.
For example, if the user unlocks the door with the door lock off switch 13e of the spare key 13, the CPU 15a inputs the key identification signal 13Z from the radio wave key receiver 19 through the input / output interface 15d in step 21, In step 22, the contents are stored in the RAM 15c.
[0071]
When the user inserts the spare key 13 into the key cylinder, the sensor 17 outputs a detection signal to the CPU 15a of the immobilizer ECU 15. When the CPU 15a of the immobilizer ECU 15 inputs the detection signal via the input / output interface 15d at step 31, the CPU 15a proceeds to step 32, outputs a signal including the random number α at that time to the transceiver 16, and at step 33, From the contents stored in the RAM 15c, the immobilizer identification code IDi4 for the spare key 13 is created by performing immobilizer identification code creation processing for the spare key 13. On the other hand, when the transponder 13a of the spare key 13 inputs the electromagnetic wave including the random number α through its antenna coil in step 41, the key side identification code IDk4 is created by performing a key side identification code creation process in step 42. When the key side identification code IDk4 is created, the transponder 13a oscillates the code IDk4 from its own antenna coil to the antenna coil 16b of the transceiver 16 in step 43.
[0072]
In step 34, when the key side identification code IDk4 is input from the transceiver 16, the CPU 15a proceeds to step 35 and performs a code discrimination process for the spare key 13 whose door is opened by radio waves. That is, in this step 35, the generated immobilizer side identification code IDi4 is compared with the input key side identification code IDk4. When it is determined that the two codes match, the CPU 15a immediately outputs an engine drive permission signal EA to the EFIECU 18 at step 36.
[0073]
If it is determined in step 35 that the two codes do not match, the CPU 15a immediately determines in step 37 whether or not there is a key that has not been subjected to code generation processing. Then, the immobilizer side identification code creation process is performed for the key, and both codes are compared in step 35. If it is determined in step 37 that code creation processing has been performed for all keys, the keys are determined to be inconsistent.
[0074]
When the engine drive permission signal EA is input, the CPU 18a of the EFIECU 18 executes various arithmetic processes for driving and controlling the engine in response to the ON signal of the ignition key switch. In other words, this system preferentially determines whether or not the immobil code ID is correct for the radio wave key that opened the door.
[0075]
Next, features of the present embodiment configured as described above will be described below.
(1) In the present embodiment, the RAM 15c of the immobilizer ECU 15 stores the radio wave key (one of the master key 12, the spare key 13, and the spare key 14) that has opened the door, and the input key side identification code. When it is determined whether or not is correct, first, the immobilizer side identification code creation process is preferentially performed for the radio wave key that opened the previous door, and the code determination process is performed. Therefore, when the radio key with the door opened is inserted into the key cylinder and used, it can be determined that the key side identification codes IDk3, IDk4, IDk5 are correct in a short time.
[0076]
(2) In the present embodiment, the immobilizer ECU 15 outputs a signal including the random number α to the transmitter / receiver 16 and performs an immobilizer-side identification code creation process for the radio wave key that opens the door stored in the RAM 15c. Identification codes IDi3, IDi4 and IDi5 are created. Therefore, before the key side identification codes IDk3, IDk4, IDk5 from the keys 12, 13, 14 are input, the immobilizer side identification codes IDi3, IDi4, IDi5 are generated for the radio wave key that opened the door last time. When the door is opened with the radio wave key and the key is inserted into the key cylinder, the code discrimination process can be performed in a very short time.
[0077]
(3) In the present embodiment, when the user performs an operation of opening the door with the radio wave key, the immobilizer ECU 15 stores the key and preferentially determines the key. Accordingly, when the door is opened with the radio keys 12, 13, and 14 to drive the engine, the immobilizer ECU 15 preferentially performs the determination process for the key and determines the immobilizer code in a short time even if the user does not perform a special operation. can do.
[0078]
In addition, this invention is not limited to the said embodiment, You may implement as follows.
(1) In the first and second embodiments, there are three automobile keys. However, any number of keys may be used as long as there are a plurality of keys. The greater the number of keys, the longer the time saved through the system and the greater the effectiveness of the system.
[0079]
(2) In the first and second embodiments, the immobilizer ECUs 5 and 15 operate the immobilizer system until it is determined to be correct in the code determination process, and release the immobilizer system only when it is determined correct. However, after the engine is driven, the immobilizer system may be released until it is determined to be incorrect in the code determination process, and the immobilizer system may be activated only when it is determined that it is not correct.
[0080]
(3) In the first and second embodiments, the 48-bit key side identification codes IDk0 to IDk5 are 40-bit processed encryption codes 30c to 32c, 50c to 52c and 8-bit fixed codes 30b to 32b. , 50b to 52b. The immobilizer ECUs 5 and 15 use the 48-bit key-side identification codes IDk0 to IDk5 in a predetermined order (the first used key or the key that opened the door by the previous radio wave) in the code determination process. It comes to compare.
[0081]
Only the 8-bit fixed codes 30b to 32b and 50b to 52b are compared with the fixed codes 40b to 42b and 60b to 62b registered in advance in the ROMs 5b and 15b of the immobilizer CPUs 5 and 15 in a predetermined order. It may be further determined whether or not the 40-bit processed encryption codes 30c to 32c and 50c to 52c are correct only for the keys that are matched in the processing. In this case, the comparison determination using the encryption codes 40c to 42c and 60c to 62c other than the keys for which the fixed codes 30b to 32b and 50b to 52b are determined to be correct is not necessary.
[0082]
(4) In the second embodiment, the RAM 15c of the immobilizer ECU 15 stores the radio wave key (one of the master key 12, the spare key 13, and the spare key 14) that opens the door. The means for opening may be changed to means for opening a door of another door control system such as a system that opens and closes using an IC card or a system that opens and closes by optical communication. In this case, it is necessary to provide means for opening the door of the door control system for each transponder built-in key, and register a key identification code corresponding to each key in the means for opening each door.
[0083]
(5) In the first and second embodiments, the first embodiment prioritizes the previously used key and performs code discrimination processing for that key, and the second embodiment opens the door. Although the radio wave key is given priority and the code discrimination process is performed for the key, this system may be implemented simultaneously. In this case, after opening the door with the radio wave of the radio key, the radio key that opened the door has priority, and when the door is not opened with radio wave after removing the key from the key cylinder, the key that was previously removed from the key cylinder has priority. Will do.
[0084]
(6) In the first and second embodiments, the key side identification codes IDk0 to IDk5 and the immobility side identification codes IDi0 to IDi5 are encrypted codes 30c to 32c, 40c to 42c that are processed by substituting the random number α into a function. , 50c to 52c, 60c to 62c and fixed code 30b to 32b, 40b to 42b, 50b to 52b, 60b to 62b, but what if it is not a code that can be easily forged by a third party? An identification code may be used.
[0085]
(7) In the first and second embodiments, the key side identification codes IDk0 to IDk5 and the immobility side identification codes IDi0 to IDi5 are processed by substituting the random number α into a 40-bit function. ~ 32c, 40c ~ 42c, 50c ~ 52c, 60c ~ 62c and 8-bit fixed codes 30b ~ 32b, 40b ~ 42b, 50b ~ 52b, 60b ~ 62b are used. If it is not counterfeited, it can be any number.
[0086]
(8) In the first embodiment, the immobilizer ECU 5 stores only the previously used key in the RAM 5c and preferentially determines the key, but other than the previously used key. When the keys used are stored in the RAM 5c in order of newest use, when it is determined that the previously used key is preferentially discriminated and is different, the key used next time is discriminated. The determination processing may be performed in the order stored in the RAM 5c.
[0087]
(9) In the second embodiment, the immobilizer ECU 15 stores only the radio wave key that opens the door in the RAM 15c and preferentially determines the key, but the radio wave that opens the door. When a key other than the key is used, it is stored in the RAM 15c in order of newness, and when it is determined that the radio key with the door opened is preferentially discriminated and is different, the radio key with the door opened next time next time. For example, the discrimination processing may be performed in the order stored in the RAM 15c.
[0088]
(10) In the first embodiment, when the keys 2, 3, and 4 are inserted into the key cylinder, the immobilizer ECU 5 transmits a random number α to the transponders 2a, 3a, and 4a of the keys 2, 3, and 4 and Immobilizer side identification code creation processing was performed for the used keys 2, 3 and 4. For example, when the keys 2, 3 and 4 were removed from the key cylinder, the random number α was set in advance, Immobilizer side identification codes IDi0 to IDi2 may be generated in advance by performing immobilizer side identification code creation processing before the next key 2, 3, 4 is inserted. In this case, when the keys 2, 3, and 4 are inserted into the key cylinder, the immobilizer ECU 5 does not need to perform complicated immobilizer-side identification code creation processing. Therefore, the determination processing time is further shortened.
[0089]
(11) In the second embodiment, when the keys 12, 13, and 14 are inserted into the key cylinder, the immobilizer ECU 15 transmits a random number α to the transponders 12a, 13a, and 14a of the keys 12, 13, and 14 and transmits radio waves. The immobilizer side identification code creation process is performed for the keys 12, 13, and 14 that have opened the door according to the above. For example, when the door is opened by the radio waves of the spare keys 12, 13, and 14, the random number α is set. Thus, immobilizer side identification codes IDi3 to IDi5 may be generated in advance by performing immobilizer side identification code creation processing before the keys 12, 13, and 14 are inserted into the key cylinder. In this case, when the keys 12, 13, and 14 are inserted into the key cylinder, the immobilizer ECU 15 does not need to perform complicated immobilizer identification code generation processing. Therefore, the determination processing time is further shortened.
[0090]
(12) In each of the above embodiments, the transponder as the transmission means is built in the ignition key, but the transmission means for outputting the identification code like the transponder may be mounted on the IC card for starting the engine. Good.
[0091]
Next, technical ideas other than the claims that can be grasped from the above embodiment will be described together with the effects thereof.
(1) In the identification code discriminating apparatus in the immobilization system according to claim 1, the identification code (IDk0 to IDk5) is an encrypted code (30c to 32c, 50c to 52c) converted using the input random number (α). It is composed of fixed codes (30b to 32b, 50b to 52b) that are not converted, and the code discriminating means (5a, 15a) is transmitted from any one of the plurality of transmitting means (2a to 4a, 12a to 14a). When the identification code (IDk0 to IDk5) is received, the fixed code (40b to 42b, 60b to 62b) in the in-vehicle side identification code (IDi0 to IDi5) for the fixed code (30b to 32b, 50b to 52b) therein ), And when it is determined that they match, the vehicle-mounted side identification code (IDi0) immediately matches To compare whether the encryption codes (40c to 42c, 60c to 62c) of the transmission means (2a to 4a, 12a to 14a) corresponding to the fixed code (40b to 42b, 60b to 62b) of IDi5) match. An identification code discrimination device in an immobility system characterized by the above.
[0092]
This eliminates the need for comparing and determining the encryption codes 40c to 42c and 60c to 62c except for the keys for which the fixed codes 30b to 32b and 50b to 52b are determined to be correct. As a result, the discrimination process of the code discrimination means can be completed in a short time.
[0093]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to shorten the identification code determination processing time in an automobile equipped with an immobilizer system and to drive the engine so that the user does not feel uncomfortable. It has the effect.
[Brief description of the drawings]
FIG. 1 is a block diagram of an immobilizer system according to a first embodiment.
FIG. 2 is an explanatory diagram for explaining a key-side encryption code.
FIG. 3 is an explanatory diagram for explaining an immobilizer side encrypted code.
FIG. 4 is a flowchart for explaining code determination processing according to the first embodiment;
FIG. 5 is a block diagram of an immobilizer system according to a second embodiment.
FIG. 6 is an explanatory diagram for explaining a key-side encryption code.
FIG. 7 is an explanatory diagram for explaining an immobilizer side encrypted code.
FIG. 8 is a flowchart illustrating a code determination process according to the second embodiment.
[Explanation of symbols]
2a-4a, 12a-14a ... transponder, 5a, 15a, 19a ... CPU, 5b, 15b ... ROM, 5c, 15c ... RAM, 12Y-14Y ... lock-off signal, IDk0-IDk5 ... key side identification code, IDi0-IDi5 ... Imobi side identification code.

Claims (3)

An identification code having the same content as an identification code (IDk0 to IDk5) different from each other transmitted from a plurality of transmission means (2a to 4a, 12a to 14a) is stored in advance as an in-vehicle side identification code (IDi0 to IDi5). 1 storage means (5b, 15b);
Second storage means (5c, 15c) storing the reading order of the plurality of vehicle-mounted identification codes stored in the first storage means (5b, 15b);
When the identification code (IDk0 to IDk5) transmitted from any one of the plurality of transmission means (2a to 4a, 12a to 14a) is received, it is stored in the second storage means (5c, 15c). Code discriminating means (5a, 15a) for reading out the vehicle-mounted side identification codes (IDi0 to IDi5) stored in the first storage means (5b, 15b) in accordance with the read order and comparing the identification codes with each other. )When,
Control means (5a, 15a) for generating an engine drive permission signal (EA) for enabling control of the engine when it is determined that the code determination means (5a, 15a) match;
An identification code discriminating apparatus in an immobilizer system comprising: writing means (5a, 15a) for storing the next reading order in the second storage means (5c, 15c). The identification code discriminating apparatus in the immobility system according to claim 1,
When the writing means (5a, 15a) discriminates that the code discriminating means (5a, 15a) match, the matched vehicle-side identification code (IDi0 to IDi5) is the first vehicle-side identification code in the next reading order. An identification code discriminating apparatus in an immobilizer system, specified as (IDi0 to IDi5) and stored in the second storage means (5c, 15c). The identification code discriminating apparatus in the immobility system according to claim 1,
The plurality of transmitting means (12a to 14a) transmit different second opening opening identification codes (12Y to 14Y),
Third storage means (19b) for storing in advance an identification code having the same content as the second identification code (12Y to 14Y) as a second vehicle-mounted side identification code;
When the second identification code (12Y-14Y) transmitted from any one of the plurality of transmission means (12a-14a) is received, the second identification code (12Y-14Y) and the first identification code A second code discriminating means (19a) for comparing the second on-vehicle side identification code stored in the storage means (19b) of No. 3 and discriminating whether or not they coincide
Second control means (19a) for generating a door lock release signal for releasing the door lock when it is determined that the second code determination means (19a) matches;
When it is determined that the second code discriminating means (19a) matches, it is stored in the first storage means (15b) of the transmitting means (12a-14a) corresponding to the matched second vehicle-mounted side identification code. A second writing means (19a) for designating the in-vehicle side identification code (IDi0 to IDi5) as the first in-vehicle side identification code (IDi0 to IDi5) in the reading order and storing it in the second storage means (15c); An identification code discrimination device in an immobility system provided

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