JP3367357B2 - Code writing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a code writing device, and more particularly to a code writing device for writing a code when wirelessly controlling equipment mounted on a vehicle such as a door lock device.

[0002]

2. Description of the Related Art Vehicles such as automobiles are equipped with a door lock device for bringing a door that can be opened and closed into a locked state in which it cannot be opened or closed and an unlocked state in which it can be opened and closed. Conventionally, the vehicle key is mounted on the key cylinder of the vehicle body to be in the locked state or the unlocked state, but in order to eliminate this trouble, in recent years, the vehicle key has been used. A wireless door lock device capable of wirelessly operating the door lock device from outside the vehicle has been put into practical use.

In this way, a vehicle capable of wirelessly operating the door lock device from outside the vehicle must be prevented from operating with a similar transmitting device in order to prevent theft. Therefore, a code representing a vehicle key is registered in the wireless door lock device, and the vehicle is registered so that the wireless door lock device operates only when the code is transmitted.

However, in order to register and inspect the code of a predetermined vehicle key for one vehicle at the time of manufacturing, it is necessary to use the actual transmission radio wave of the predetermined vehicle key, and To prevent interference with other transmitted radio waves,
It must be done in a shielded area. As a result, the manufacturing environment of the factory becomes expensive.

In order to solve such a problem, there has been proposed a remote control device which does not register a code signal sent from a transmitter as a new code signal when the code signal cannot be received in an accurate waveform (Japanese Patent Laid-Open No. 5-187158). (See Japanese Patent Publication). This technique improves reliability by comparing the code signals stored in the two storage elements and storing the code signals only when they match.

[0006]

However, in the conventional apparatus, the code signal transmitted from the transmission key is stored in two storage elements, and when the two stored code signals match, the code signal is registered. Therefore, when an erroneous code different from the code to be originally registered is continuously transmitted from adjacent or distant steps, for example, the step of transmitting another code signal in order to register a different code signal, An incorrect code will be registered.

In consideration of the above facts, an object of the present invention is to obtain a code writing device capable of surely registering a code to be registered from a remote place without registering an erroneous code.

[0008]

In order to achieve the above object, a code writing apparatus according to the present invention is capable of writing a code including a predetermined ID and is mounted on a vehicle by the code. To the device control means for controlling the device, which outputs a predetermined permission code indicating permission to write the registration code wirelessly transmitted, and the registration code and the permission wirelessly transmitted to the device control means. Receiving means for receiving and outputting a code, and setting the permission code input by the permitting means , and setting the permission code
And a writing unit that writes the registration code received when the receiving unit receives the permission code that coincides with .

According to a second aspect of the present invention, in the code writing apparatus according to the first aspect, the permission means outputs one permission code of a plurality of predetermined different permission codes. And

According to a third aspect of the present invention, in the code writing apparatus according to the first or second aspect, the device control means is in a locked state in which the openable / closable door of the vehicle cannot be opened / closed and in an openable / closable door. The door lock device is set in a locked state.

In the code writing apparatus of the present invention, the permission means outputs a predetermined permission code. This permission code represents permission to write a registration code including an ID transmitted wirelessly, and the registration code is written in a device control means such as a door lock device that controls a device mounted on a vehicle. Is. The device control means may be used the door lock device for setting an openable door vehicles in open non-locked state and open unlocked state. Registration code including ID and the registration code
The permission code indicating the write permission is transmitted wirelessly. The device control means receives the registration code and the authorization code received by the reception means and transmitted by radio. The writing means sets the permission code input by the permission means and receives the permission code that matches the set permission code.
When received by the receiving means , the writing means writes the received registration code. Therefore, the writing of the registration code is considered only when the permission code output from the permission means and the transmitted permission code match.

As described in claim 2, the permitting means outputs one permitting code among a plurality of different permitting codes set in advance so that the plurality of code writing devices can be operated in adjacent steps. Different permission codes can be set when writing the registration code by using the registration code. Therefore, even if it is received from the adjacent process, it is not written by mistake.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. The present embodiment is a body electronic control unit (hereinafter, referred to as a body electronic control unit that operates a door lock device or the like by a code transmitted from a regular ignition key).
The present invention is applied to a body ECU).

As shown in FIG. 1, a body ECU 12 as a writing means of this embodiment includes a CPU 14 and a RAM 1.
6, a ROM 18, and an input / output port (I / O) 22. The microcomputer is constituted by each of which is connected by a bus 24 so that commands and data can be exchanged. Further, the body ECU 12 stores an E ² PR that stores a proper code such as a unique code of a vehicle key (details will be described later).
It has an OM 20 and is connected to a bus 24. The ROM 18 stores a processing routine, which will be described later, executed by the body ECU 12.

Input / output port 22 of the body ECU 12
Indicates L for displaying the operating state of the body ECU 12.
Status display 26 such as ED, and buzzer 28
Are connected. Further, the input / output port 22 is connected via a driver 40 to a door lock device 42 that puts an openable / closable door of the vehicle into a lockable state that cannot be opened / closed or an unlockable state that can be opened / closed.

Further, the input / output port 2 of the body ECU 12
2 is connected to the receiver 46. The receiver 46 is for converting the radio signal from the ignition key 32 into a code. The power supply control signal and the unique code signal (CODE) from the receiver 46 are exchanged between the body ECU 12 and the receiver 46.

Further, the receiver 46 is connected with an antenna 44 as a receiving means for transmitting / receiving a signal to / from the ignition key 32. The antenna 44 is built in the receiver or attached to the rear window glass.

Ignition key 32 of this embodiment
Stores a unique code indicating that it is a vehicle key. A key antenna 34 is built in the ignition key 32. The ignition key 32 has
A lock switch 31, an unlock switch 33, a trunk switch 35, and a panic switch 37 are provided. Each of these switches is a trigger switch for transmitting a code representing a function together with a unique code from the key antenna 34. That is, the lock switch 3
When the door lock device 42 is pressed to output a code for making the door incapable of opening and closing, the unlock switch 33 presses the door lock device 42 to open and close the door. Output the code. Further, when the trunk switch 35 is pressed, a code for opening a trunk (not shown) mounted on the vehicle is output. The panic switch 37 outputs a code for putting the vehicle in an alarm state.

In this embodiment, each switch is pressed to transmit a code representing each function and a unique code. However, in order to transmit a write permission code described later, a predetermined switch (this embodiment) is used. Then lock switch 31)
The pressing method of is determined in advance. That is, if the signal transmitted by simply pressing the predetermined switch is used as the write permission signal, it may be operated erroneously. Therefore, in the present embodiment, the write permission code is transmitted by the following method. To do.

By pressing the lock switch 31 and the unlock switch 33 at the same time and pressing either switch within a predetermined time (for example, 3 seconds), the unique code ID, the key code KEY, and the function code J are selected. The write permission code is generated and transmitted. This key code K
As EY, a value generated by a predetermined value or a random number is set. The function code J is a code indicating which switch is pressed. The code transmitted by normal pressing (normal code) is the unique code ID.
And a function code J.

The other write permission codes described above are as follows. The ignition key 32 is provided with a counter whose count value automatically increases / decreases each time it is transmitted, and instead of the key code KEY, a write enable code generated by including the counter value as a signal to be transmitted, and the counter value thereof. There is one in which a plurality of write permission codes are generated in sequence. As described above, the write permission code can be selected from a plurality of code types.

The write permission code may be classified according to the operation of the switch or the condition may be set.
For example, setting of pressing a predetermined switch multiple times, setting of combination of switches to be pressed, setting of pressing time when pressing, setting of time interval when pressing multiple switches, pressing that prohibits use for transmission of write permission code There is a prohibit switch setting. These settings may be expressed in the function code J in addition to the above types.

When the ignition key 32 has a counter that automatically increases / decreases each time the count value is transmitted, the count value is included in the signal to be transmitted, and the signal is transmitted from the continuation of the counter value. It may be configured to determine whether or not it is a code. Alternatively, the ignition key 32 may be provided with no counter and the transmitted counter value may be increased or decreased and returned.

Input / output port 22 of the body ECU 12
Is equipped with a harness 50. The harness 50 is a terminal group for connecting the write device 54 as permitting means. The harness 50, the write apparatus 54 is connected. The write device 54 is a device for registering a code by the ignition key 32 to the body ECU 12, CPU 56, RAM 58, ROM 60, is constituted by input and output ports (I / O) 62, a microcomputer, each command And a bus 64 so that data can be exchanged. It should be noted that the ROM 60 stores a processing routine, which will be described later, that executes registration processing by transmission by the ignition key 32.

Further, the input and output ports 62 of the write unit 54, a monitor 64 for displaying the progress of the keyboard 62 and the command and processing for command input is connected.

Here, the E ² PR of the body ECU 12 is
The OM20 is an electrically writable and erasable ROM
The unique code of the vehicle key as the registration code is for storing or updating. This E ² PR
As shown in FIG. 2, the OM 20 has a capacity secured so that four unique codes can be stored. The unique code CODE_A of number 1 is for storing the unique code recorded in the ignition key 32, which is the main key, and is recorded in the process described later. A registration frame T, which will be described later, can be set in the recording area of each unique code. It should be noted that the unique code CODE_B with the number 2 is facilitated in advance to store the unique code recorded in the subkey. Also, the unique code CODE_ of number 3
The unique code CODE_D of C and the number 4 is prepared for storing a spare code so that the user can additionally register the subkey. In the present embodiment, four codes can be stored in the E ² PROM 20 as regular codes, but three or less or five or more codes may be stored.

Next, the operation of this embodiment will be described. In the present embodiment, a registration process (code writing process) performed using the ignition key 32 which is a main key will be described. First, in performing the following code writing process, the body ECU 12 and the writing device 54 are connected by the harness 50.

When power is supplied to the writing device 54, FIG.
When the body ECU 12 is supplied with power, the processing routine of FIG. 4 is executed.

[0029] First, in the writing device 5 4, in step 100 of FIG. 3, the keyboard input is repeatedly executed to read the keyboard 62 to a predetermined write mode transition command is input, the write mode transition command is input Then, in the next step 102, the input write mode transition command is output to the body ECU 12. In the next step 104, the E ² PRO of the body ECU 12 is
Keyboard input is repeatedly read until the number of registered codes to be written in M20 is input, and when the number of registered numbers is input, the input number of registered numbers is output in the next step 106. In the present embodiment, it is assumed that 1 is entered as the number of registrations. In the next step 108, keyboard input is repeatedly read until the type of write permission code is selected and designated. The type of the write permission code designates the type of the write permission code transmitted from the ignition key 32, and in the present embodiment, is composed of a unique code ID, a key code KEY, and a function code J. It is assumed that the type of write permission code is specified. When the type of write permission code is selected and specified, the next step 1
At 10, the keyboard input is read repeatedly until the function bit is specified. This function bit is designated by the type of the write permission code designated in step 108, that is, the unique code ID and the key code KE.
This is a designation for specifying the switch to be pressed after the lock switch 31 and the unlock switch 33 are simultaneously pressed in the write permission code including Y and the function code J. In the present embodiment, the pressing of the lock switch 31 is designated.

In the next step 112, the type and function bit of the designated write permission code are output, and in the next step 114, the write setting completion display showing the completion of the setting of the write permission code is displayed. In the next step 116, until the registration response indicating that the writing process of the body ECU 12 to the E ² PROM 20 is completed is input, the body EC
Monitor U12.

When a registration response is input from the body ECU 12 as will be described later, an affirmative decision is made in step 116, and a registration completion display is displayed on the monitor 64 in step 118.
In the next step 120, an end command is output to the body ECU 12, and when an end response is input from the body ECU 12 (affirmative determination in step 122), the process of the writing device 54 ends.

On the other hand, the body ECU 12, at step 200 of FIG. 4, from the writing device 5 4 to write mode transition command is output repeatedly determines whether or not the write mode transition command is present, writing when the write mode switching command from the device 5 4 is outputted, the next step 202
At, the program shifts to the write mode in which the unique code is written in the E ² PROM 20. In this step 202,
It is preferable to let the user recognize that the operating state of the body ECU 12 is shifting to the writing mode by, for example, lighting the status display 26. In the next step 204, it is determined whether or not the number of registrations is designated by the writing device 52. If the number of registrations is not designated, the process proceeds to step 230 and a predetermined time (for example, 3 seconds)
It is determined whether or not has passed. If the predetermined time has not elapsed, a negative determination is made in step 230, and step 2
Return to 04. On the other hand, when the predetermined time has elapsed, it indicates that the body ECU 12 is shifted from the writing mode to the normal mode which is a normal processing state in step 232, and is shifted to the normal mode to the writing device 52 in the next step 234. The shift response is output, and the writing process of the body ECU 12 is completed.

When the number of registrations has been designated by the writing device 52 and an affirmative decision is made in step 204, the routine proceeds to step 206, where the writing code frame is masked. This masking process of the write code frame is effective at the time of manufacturing, that is, at the time of factory registration, and the E ² PROM 20 of the body ECU 12 capable of electrically writing and erasing,
Of the capacities reserved in advance for storing 4 unique codes, a writable registration frame T (FIG. 2) is set according to the number of registrations, and other registration frames T are not writable. This is the process of setting. In the present embodiment, since the number of registrations is set to 1, the unique code is set to be writable only in the unique code CODE_A with the number 1 in step 206.

[0034] In the next step 208, by determining whether the type and function bits of the write authorization code from the writing device 5 4 has been output (step 112 in FIG. 3),
It is determined whether or not the command of the write permission code is input. If no command has been input, a negative determination is made in step 208 and the operation proceeds to step 230. If a command has been input, an affirmative determination is made and the operation proceeds to step 210.

[0035] At step 210, the type and function bit write enable code input from the writing device 5 4,
Set the write permission code. In this case, unique code ID
Is a type of write permission code including a key code KEY and a function code J, and the pressing of the lock switch 31 is set. In the next step 212, it outputs a response indicating completion of the setting of the write enable code to the writing device 5 4.

In the next step 214, it is judged whether or not the write permission code is transmitted from the ignition key 32, and if the judgment is affirmative, it is judged in the next step 218 whether or not this time is the first writing (registration). If it is the first registration, the unique code in the registration frame is erased in step 220, and then the unique code transmitted from the ignition key 32 is registered in the next step 222 and the buzzer 28 is registered. To do. In the present embodiment, since the number of registrations is 1, it is determined that the registration is the first time and the process proceeds to step 220. When it is not the first registration, that is, when there are a plurality of registrations and the second and subsequent registrations are made, a negative determination is made in step 218, and the unique code is registered in the next registration frame in step 222 without erasing the already registered unique code. Then, the process proceeds to step 224.

On the other hand, when the writing permission code is not transmitted from the ignition key 32, a negative determination is made in step 214, and a predetermined time (eg 40
Second) has elapsed, the process proceeds to step 232 after a predetermined time has elapsed, and to step 224 if the predetermined time has not elapsed.

In step 224, it is judged whether or not all registrations are completed. If there is an unregistered unique code, a negative judgment is made in step 224, and the process returns to step 214. If all registrations are completed, an affirmative judgment is made in step 224. is, in the next step 226 to the write device 4 outputs a registration response indicating registration completion of the unique code, monitors the output from the writing device 54 from the writing device 54 until the end command is input. When the end command is input from the writing device 54 is affirmative determination in step 228, and proceeds to the normal mode (step 232), and outputs a transition response indicating that the transition to the write device 4 to the normal mode (step 234), the writing process of the body ECU 12 is ended.

As described above, in the present embodiment, the writing device 54 is capable of writing a code by transmitting the unique code from the ignition key, and the type and transmission state of the write permission code (switch combination etc.). The body ECU1
Output to 2. In the body ECU 12, the type and the transmission state of the writing permission code from the writing device 54 are set as the writing condition when writing the code, and the writing permission code transmitted by operating the switch of the ignition key 32 is
The unique code is written in the E ² PROM ²⁰ only when the set write condition is met. Therefore, the unique code of the ignition key to which the write permission code is transmitted can be registered in the E ² PROM 20 as a normal code corresponding to the unique code of the normal ignition key. Therefore, the unique code included in the radio waves transmitted from the adjacent steps will not be mistakenly registered in the E ² PROM 20 as a proper unique code.

Although the writing device is connected to the body ECU by the harness in the above embodiment, the writing device may be directly connected at the time of manufacture or may be connected to the receiver side.

Further, since the writing device of the present embodiment can be connected to the body ECU by the harness, the writing device can be easily attached and detached at the time of manufacturing. Therefore, when there are a plurality of code writing steps during manufacturing, if a different write permission code is set in advance for each writing device, the unique code writing process may be performed in adjacent steps. Also, the unique code of the key used in the adjacent process or the one that is not the proper unique code is not written by mistake.

In the above embodiment, the case where the present invention is applied to the body ECU that operates the door lock device or the like by the code transmitted from the ignition key has been described, but the present invention is not limited to this. Immobilizer (Imobilize) that functions as a vehicle antitheft device
r) Application to electronic control devices is also possible. The immobilizer electronic control unit prohibits starting the engine or the on-vehicle electronic device when the regular ignition key is not used in conjunction with the ignition key being loaded in the key cylinder (vehicle antitheft). Device.
For example, in order to prevent theft when the engine is started with a similar key, a transponder that records a unique code indicating that it is a legitimate vehicle key in conjunction with the ignition key being loaded in the key cylinder Refer to the code sent by you to inhibit the engine from starting when the legitimate ignition key is not used.

[0043]

As described above, according to the present invention, a predetermined permission code indicating permission to write a registration code including an ID transmitted by radio is output by the permitting means, and the registration transmitted by radio is transmitted. Since the receiving means receives the code and the permission code, the writing means sets the permission code from the permitting means, and the received registration code is written when the set permission code is received, only the regular registration code can be written. With the permission, it is possible to write only the registration code from the regular vehicle key transmitted from the remote place.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a body ECU and a writing device according to an embodiment of the present invention.

FIG. 2 is an image diagram showing a unique code stored in an E ² PROM.

FIG. 3 is a flowchart showing a processing flow of a writing device.

FIG. 4 is a flowchart showing a processing flow of a body ECU.

[Explanation of symbols]

12 body ECU 20 E ² PROM 46 receiver 50 harness 54 writing device

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 49/00-49/04 B60R 25/00

Claims (3)

(57) [Claims] 1. A device control means capable of writing a code including a predetermined ID and controlling the device mounted on the vehicle by the code, indicates a predetermined permission for writing the registration code wirelessly transmitted. A permission unit that outputs a permission code, a receiving unit that receives and outputs the registration code and the permission code wirelessly transmitted to the device control unit, and a permission code input by the permission unit , Enter the permission code that matches the set permission code
A code writing device comprising: writing means for writing the registration code received when received by the receiving means . 2. The code writing device according to claim 1, wherein the permission unit outputs one permission code of a plurality of different permission codes set in advance. 3. The door control device according to claim 1, wherein the device control means is a door lock device that sets an openable / closable door of the vehicle to a locked state in which the vehicle cannot be opened and closed and an unlocked state in which the vehicle can be opened / closed. The described code writing device.