JPH10131568A - Key device for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a burglarproof function and a remote control function for a door and a trunk lid, which can be given even to a car having no ignition key switch. SOLUTION: Even when operating members 1a, 1b are operated by mistake when a key 1 is inserted into a key cylinder and specified operation (such as engine start operation, etc.), is conducted, a first ID is not transmitted from a first transmission circuit 1c when the transmission demand signal of a second ID is received by a second transmitter-receiver circuit 1d. Accordingly, the execution of processing corresponding to the operation content of an operating member by a first control circuit is prevented, and operation against the will of a crew can be obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle key device having an anti-theft function and a remote control function of a door and a trunk lid.

[0002]

2. Description of the Related Art There is known a keyless entry device for a vehicle that locks or unlocks a door without inserting a key into a door key cylinder and performing an opening / closing operation. In this type of device, when a door lock / unlock switch of a keyless remote control key (hereinafter, referred to as a keyless remote control key) is pressed, lock / unlock information and a unique ID of the key are transmitted. If the received ID matches the registered ID, the door is locked / unlocked.

Further, a transponder in which an ID unique to the ignition key is set is embedded, and the key ID is read and collated with the registered ID each time the engine is started.
A vehicle antitheft device (hereinafter, referred to as an immobilizer device) that permits the operation of the engine when the values match with each other is known (see, for example, Japanese Patent Application Laid-Open No. 64-56253).

By the way, in a normal vehicle, a door key and an ignition key are shared, and in such a vehicle, a keyless remote controller (hereinafter, referred to as a keyless remote controller) and a transponder are embedded in the ignition key. However, when starting the engine with an ignition key with a keyless remote control embedded,
The door lock / unlock switch may be pressed by mistake, and the door may be locked or unlocked against the occupant's will. In order to prevent such a problem, the conventional keyless entry device is provided with a key switch for detecting that the ignition key has been inserted into the key cylinder, and a door lock / lock when the ignition key is inserted into the cylinder. The door is not locked / unlocked even when the unlock switch is operated.

[0005]

However, in a vehicle not equipped with a key switch, the erroneous operation of the door lock / unlock at the time of starting the engine is inevitable.
In order to equip a vehicle with a keyless entry device, it is necessary to install a key switch.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle key device having an anti-theft function and a remote control function of a door and a trunk lid, which can be installed in a vehicle without a key switch.

[0007]

The present invention will be described with reference to FIGS. 1 to 4 showing the configuration of an embodiment. (1) According to the first aspect of the present invention, the operating members 1a and 1b are operated. Then, a first transmission circuit 1c for transmitting the first ID,
A key 1 having a second transmission / reception circuit 1c for transmitting the second ID upon receiving a transmission request signal of the second ID;
The first control circuit 100, 109 for executing a process corresponding to the operation content of the operation members 1a, 1b, and the key 1 is used as a key cylinder. A second ID transmission request signal is transmitted when a predetermined operation is performed after being inserted, and a second ID is transmitted.
D is received and collated with the registration ID, and if the two do not match, the second control circuits 2 to 4 perform predetermined processing. The first transmission circuit 1c includes a second transmission / reception circuit 1d When the transmission request signal of the second ID is received, the first ID is not transmitted even if the operation members 1a and 1b are operated.
When the key 1 is inserted into the key cylinder and a predetermined operation (for example, an engine start operation, an electric motor start operation, or the like) is performed, even if the operation members 1a and 1b are operated by mistake, the second transmission / reception circuit 1d When the transmission request signal of the second ID is received in the first transmission circuit 1c
Is not transmitted, and the execution of the processing by the first control circuits 100 and 109 according to the operation contents of the operation members 1a and 1b is prevented. (2) The operating members 1a, 1 of the vehicle key device according to claim 2.
Reference numeral b denotes an operation member for locking / unlocking the door of the vehicle, and the first transmission circuit 1c transmits lock / unlock information and a first ID when the operation members 1a and 1b are operated. (3) The operating member of the vehicle key device according to claim 3 is an operating member for opening a trunk lid of the vehicle.
When the operating member is operated, the transmitting circuit 1c transmits the trunk lid opening information and the first ID. (4) The second control circuit 2 of the vehicle key device according to claim 4.
The predetermined processes of Nos. To 4 are processes for prohibiting the operation of the engine. (5) The vehicle of the vehicle key device according to claim 5 is an electric vehicle that uses an electric motor as a driving source, and the predetermined process of the second control circuit is a process of prohibiting the operation of the electric motor.

[0008] In the section of the means for solving the above problems, the drawings of the embodiments are used for easy understanding of the description, but the present invention is not limited to the embodiments.

[0009]

【The invention's effect】

(1) According to the present invention, even if the operation member is erroneously operated when the key is inserted into the key cylinder and a predetermined operation is performed, the transmission request signal of the second ID is transmitted by the second transmission / reception circuit. Since the first ID is not transmitted from the first transmission circuit since the first transmission circuit is received, the first control circuit executes a process contrary to the intention of the occupant without providing a key switch on the ignition key cylinder. Can be prevented. (2) According to the invention, when a key is inserted into a key cylinder and a predetermined operation is performed, an operation member for locking / unlocking a vehicle door or a trunk lid for opening a vehicle trunk lid is provided. Even if the operation member is erroneously operated, the transmission request signal of the second ID is received by the second transmission / reception circuit.
Is not transmitted, and the first control circuit can prevent the door from being locked / unlocked and the trunk lid from being opened against the intention of the occupant.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 is an external view of an ignition key, FIG. 2 is a circuit diagram of a keyless remote controller (keyless remote control) and a transponder built in the ignition key, FIG. 3 is a circuit diagram of an immobilizer device mounted on a vehicle, and FIG. It is a circuit diagram of the mounted keyless entry device. FIG. 5 is a flowchart showing an ignition key communication process. The key device according to the embodiment includes an ignition key 1 shown in FIGS. 1 and 2, an immobilizer device shown in FIG. 3, and a keyless entry device shown in FIG.

As shown in FIG. 1, the head of the key 1 is provided with a door lock switch 1a and a door unlock switch 1b of a keyless remote controller to be described later. FIG.
As shown in FIG. 1, a keyless remote controller 1c and a transponder 1d are embedded in the key 1. When the lock switch 1a is operated, the keyless remote controller 1c transmits the lock information and the ID set to the key 1 to lock / unlock the door without using the key, and the unlock switch 1b is operated. Then, the unlock information and the key 1 ID are transmitted. The transponder 1b transmits the ID of the key 1 to the immobilizer device at the time of starting the engine in order to collate the ID set in the key 1 with the registered ID and determine whether to permit the operation of the engine.

Here, in order to distinguish the ID stored in the keyless remote control memory 11 from the ID stored in the transponder memory 15, the ID stored in the keyless remote control memory 11 is called a keyless entry ID, The ID stored in the transponder memory 15 is called an immobilizer ID.

The keyless remote controller 1c is mainly composed of a controller 12 having a microcomputer.
The communication with the keyless entry device on the vehicle side shown in FIG. The controller 12 is connected with a nonvolatile memory 11 such as an EEPROM in which a unique keyless entry ID is stored for each key, a door lock switch 1a, a door unlock switch 1b, an antenna 13, and a battery BAT.

The transponder 1d includes a nonvolatile memory 15 such as an EEPROM in which an immobilizer ID unique to each key is stored, an antenna 16, and a capacitor 17. The capacitor 17 receives a pulse signal (immobilizer ID transmission request signal) radio wave of a predetermined frequency transmitted from the antenna of the immobilizer device, stores the electric wave, and uses the electric wave as transmission power at the time of ID transmission.
When receiving a pulse signal radio wave of a predetermined frequency from the antenna of the immobilizer device, the transponder 1d reads the immobilizer ID from the memory 15 using the transmission power.
Is read and transmitted to the immobilizer device.

As shown in FIG. 3, the immobilizer device includes an antenna unit 2, an immobilizer unit 3,
An engine control unit 4 and a self-diagnosis tester 5 are provided. Note that the self-diagnosis tester 5 is a connector 5
1, it is detachable from the engine control unit 4.

In FIG. 3, an antenna unit 2 is installed in an ignition key cylinder (not shown) of a vehicle, and has an antenna 21 and a pulse signal (immobilizer ID) having a predetermined frequency for transmission to a transponder 1d.
An oscillator 22 for generating a transmission request signal), an amplifier 23 for amplifying a signal (immobilizer ID) received from the transponder 1d, a demodulator 24 for demodulating a received signal to an immobilizer ID, and connecting the oscillator 22 to the antenna 21 during transmission. And a switch 25 for connecting the amplifier 23 to the antenna 21 at the time of reception, a control circuit 26 for controlling communication with the transponder 1d in accordance with a command from the immobilizer unit 3, and an interface 27 for communicating with the immobilizer unit 3. I have. When receiving the immobilizer ID acquisition command from the immobilizer unit 3 via the interface 27, the control circuit 26 switches the switch 25 to the T side, and transmits a pulse signal of a predetermined frequency generated from the oscillator 22 to the antenna 21 for a predetermined time. Via the transponder 1d. This transmission time is a time sufficient for the transmission power to be stored in the interface 14 of the transponder 1d. Immediately after the transmission is completed, the switch 25 is switched to the R side to receive the signal radio wave transmitted from the transponder 1d, amplify it by the amplifier 23, and demodulate it by the demodulator 24.
Demodulate to D.

The immobilizer unit 3 includes a microcomputer 34, a memory 31, an interface 32,
33 and the like. The immobilizer unit 3 communicates with the antenna unit 2 via the interface 33 in response to the immobilizer ID collation request from the engine control unit 4, reads the immobilizer ID of the key 1 via the antenna unit 2, and reads the non-volatile memory. I registered in advance in 31
Match with D. The immobilizer unit 3 also communicates with the engine control unit 4 via the interface 32, and transmits the immobilizer ID collation result to the engine control unit 4.

The engine control unit 4 includes a microcomputer 42 and peripheral components such as an interface 41 and a memory 43. The engine control unit 4 controls the ignition device 6 and the fuel supply device 7 to start, stop, and adjust the speed of the engine. The communication with the immobilizer unit 3 is performed via the interface 41, and the immobilizer I
Requests collation of D and receives the collation result. When an ID mismatch signal is received from the immobilizer unit 3,
The operation of the ignition device 6 and the fuel supply device 7 is stopped to stop the engine. The engine control unit 4 also includes a switch 81 that closes when the key 1 is set to the engine start position ST, and a key 1 that is connected to the engine operating position O.
A switch 82 that is closed when set to N or the start position START is connected.

The self-diagnosis tester 5 is detachable from the engine control unit 4 by a connector 51, and is used for performing an initialization operation when the immobilizer unit 3 or the engine control unit 4 is replaced.

Here, an example of a communication process between the immobilizer unit 3 and the engine control unit 4 will be described. (1) ID Verification Request When the engine control unit 4 detects that the engine has been started by the key 1 using the switch 81, the engine control unit 4 starts the ignition device 6, the fuel supply device 7, and a starter motor (not shown) to start the engine. And sends an ID collation request signal to the immobilizer unit 3.

(2) ID Verification Upon receiving the ID verification request signal from the engine control unit 4, the immobilizer unit 3 reads out the immobilizer ID from the transponder 1d of the key 1 by the antenna unit 2 and verifies it with the registered ID.
Then, an ID match signal or an ID mismatch signal of the collation result is transmitted to the engine control unit 4.

(3) Processing Based on ID Verification Result Upon receiving the ID mismatch signal from the immobilizer unit 3, the engine control unit 4 immediately stops the ignition device 6 and the fuel supply device 7 to stop the engine. On the other hand, when the ID coincidence signal is received, the operation permission processing of the engine is not immediately performed, and it is confirmed whether or not the immobilizer unit 3 itself is a proper one in the following procedure.

(4) Rolling Code Transmission Request The engine control unit 4 having received the ID coincidence signal from the immobilizer unit 3 requests the immobilizer unit 3 to transmit a rolling code. This rolling code is set by the engine control unit 4 when the engine was stopped last time, sent to the immobilizer unit 3 and stored in the memory 31.
A different code is set for the rolling code every time the engine is stopped.

(5) Rolling Code Transmission The immobilizer unit 3 that has received the rolling code transmission request from the engine control unit 4 transmits the rolling code to the engine control unit 4 at the previous engine stop.
, And transmits the rolling code stored in the memory 31 to the engine control unit 4.

(6) Receiving the rolling code The engine control unit 4, which has received the rolling code from the immobilizer unit 3, checks this rolling code against the rolling code sent to the immobilizer unit 3 when the engine was stopped last time. If so, it is determined that the immobilizer unit 3 is proper, and here, the engine operation permission processing is performed for the first time. However, when the rolling codes do not match, it is determined that the immobilizer unit 3 or the engine control unit 4 has been replaced by a theft scheme, the ignition device 6 and the fuel supply device 7 are immediately stopped to stop the engine, and An engine start prohibition process is performed by a starter (not shown).

The engine operation permitting process is a process for permitting a running engine to continue to operate as it is, and is not a process for permitting a stopped engine to start. The ID mismatch signal is
This is a signal for stopping the running engine, but does not prohibit starting the engine when the engine is stopped. Further, the permission to start the engine is to permit the start of the stopped engine, and the prohibition of the start of the engine is to prohibit the start of the stopped engine. These start permits and start prohibitions are invalid for an already running engine.

Next, the keyless entry device shown in FIG. 4 will be described. The controller 100 includes a microcomputer and its peripheral parts, and locks / unlocks a driver's seat door, a passenger's seat door, and rear left and right doors. Reference numerals 101 to 104 denote door lock actuators of a driver's seat door, a passenger's seat door, a rear seat right door, and a rear seat left door, respectively. Door lock actuators 101 to 104
Drives a door lock mechanism (not shown) to the lock side or the unlock side.

The lock relay 105 is connected to the transistor 10
6, the power of the battery BAT is supplied to the door lock actuators 101 to 104 and driven to lock each door. The unlock relay 107 is driven by a transistor 108, and is connected to a battery BAT.
Is supplied to the door lock actuators 101 to 104 and driven to unlock each door.

The keyless entry unit 109 is connected to the control circuit 1. The keyless entry unit 109 includes lock / unlock information transmitted from the keyless remote controller 1c by an antenna (not shown) installed in the rear window and the keyless entry I.
When D is received and collated with a pre-registered ID, if both match, a lock / unlock command is output to controller 100.

Switches for detecting the state of each door and switches for detecting the state of the vehicle are also connected to the controller 100. The switch 110 is
The circuit is closed when the ignition key 1 is in the ON position or the START position. A switch 111 is a driver door key cylinder lock switch that closes when the driver door key cylinder is in the lock position, and a switch 112 is a passenger seat door key cylinder lock switch that closes when the passenger door key cylinder is in the lock position. Also,
Switches 113 to 116 are door switches that are closed when the driver door, the passenger door, the rear right door, and the rear left door are open.

The operation of the embodiment will be described with reference to FIG. In step 1, it is confirmed whether the lock switch 1a or the unlock switch 1b has been operated. If the lock switch 1a or the unlock switch 1b has been operated, the process proceeds to step 2. In step 2, the immobilizer I is transmitted from the antenna unit 2 of the immobilizer device.
It is confirmed whether or not there is a request for transmitting the immobilizer ID.
And reads out the immobilizer ID from the antenna 16 and transmits it by the antenna 16. The transmission request of the immobilizer ID means that the ignition key 1 is inserted into the key cylinder and the engine has been started, and the lock switch 1a or the unlock switch 1b made at the time of starting the engine has been operated. Is considered to be an erroneous operation as described above. Therefore, the output of the lock command or the unlock command to the keyless entry device is prohibited in the following step 4.

On the other hand, if the lock switch 1a or the unlock switch 1b is operated and there is no transmission request of the immobilizer ID from the immobilizer device, it is determined that the operation is a normal keyless entry operation, and step 5 is performed.
Transmits a lock command or an unlock command and a keyless entry ID from the antenna 13.

If neither the lock switch 1a nor the unlock switch 1b is operated, step 6
Then, it is checked whether or not there is an immobilizer ID transmission request from the immobilizer device. If there is an immobilizer ID transmission request, the immobilizer ID is read from the memory 15 and transmitted from the antenna 16 in step 7.

The operation of the immobilizer device that has received the immobilizer ID and the operation of the keyless entry device that has received the door lock command or the door unlock command are not directly related to the present invention, and will not be described in detail. .

As described above, when the key 1 is inserted into the key cylinder and a predetermined operation is performed, even if the switches 1a and 1b for locking / unlocking the door of the vehicle are erroneously operated, the transponder 1d can be operated. As the transmission request signal of the immobilizer ID is received, the keyless remote controller 1c does not transmit the keyless entry ID, and the keyless entry device locks the door against the will of the occupant even if no key switch is provided on the ignition key cylinder. / Unlocking can be prevented.

In the configuration of the above embodiment, the keyless remote controller 1c serves as the first transmitting circuit, the transponder 1d serves as the second transmitting / receiving circuit, the key 1 serves as the key, and the controller 100 and the keyless entry unit 109 serve as the first transmitting circuit. The control circuit of the antenna unit 2,
The immobilizer unit 3 and the engine control unit 4 each constitute a second control circuit.

In the above-described embodiment, a vehicle using an engine as a driving source has been described as an example. However, the present invention can be applied to an electric vehicle using an electric motor as a driving source. In the case of an electric vehicle, the transponder and the keyless remote controller described above may be provided on the main key instead of the ignition key, and when the ID collation result does not match by the immobilizer device, the operation of the electric motor may be prohibited to prevent the running.

Further, in the above-described embodiment, an example has been shown in which the keyless entry device locks / unlocks the vehicle door. However, the remote control key is provided with a switch for opening the trunk lid of the vehicle, and the switch is provided with the switch. When operated, the trunk lid may be opened on condition that the ID matches.

[Brief description of the drawings]

FIG. 1 is an external view of an ignition key.

FIG. 2 is a circuit diagram of a keyless remote controller and a transponder built in an ignition key.

FIG. 3 is a circuit diagram of an immobilizer device mounted on a vehicle.

FIG. 4 is a circuit diagram of a keyless entry device mounted on a vehicle.

FIG. 5 is a flowchart showing an ignition key communication process.

[Explanation of symbols]

Reference Signs List 1 key 1a door lock switch 1b door unlock switch 1c keyless remote controller (keyless remote controller) 1d transponder 2 antenna unit 3 immobilizer unit 4 engine control unit 5 diagnostic tester 6 ignition device 7 fuel supply device 11 keyless entry memory 12 controller 13 antenna 15 Immobilizer memory 16 Antenna 17 Capacitor 21 Antenna 22 Oscillator 23 Amplifier 24 Demodulator 25 Switch 26 Control circuit 27 Interface 31 Memory 32, 33 Interface 34 Microcomputer 41 Interface 42 Microcomputer 43 Memory 81, 82 Switch 100 Controller 101-104 Door lock actuator 105 b Lock relay 106 Transistor 107 Unlock relay 108 Transistor 109 Keyless entry unit 110 Switch 111,112 Key cylinder lock switch 113-116 Door switch

Claims (5)

[Claims] 1. A first transmission circuit for transmitting a first ID when an operation member is operated, and a second transmission / reception circuit for transmitting the second ID when a transmission request signal for a second ID is received. A first control circuit that receives the first ID, collates the received ID with a registered ID, and executes a process in accordance with the operation content of the operation member if the two match each other; When a predetermined operation is performed by being inserted into the key cylinder, the transmission request signal of the second ID is transmitted, and the second ID is received and collated with the registered ID. And a second control circuit that executes a predetermined process, wherein the first transmission circuit is configured to perform the operation when the second transmission / reception circuit receives a transmission request signal of the second ID. Do not transmit the first ID even if the member is operated Characteristic vehicle key device. 2. The vehicle key device according to claim 1, wherein the operation member is an operation member for locking / unlocking a door of the vehicle, and the first transmission circuit is operated when the operation member is operated. And transmitting the lock / unlock information and the first ID. 3. The key device for a vehicle according to claim 1, wherein the operation member is an operation member for opening a trunk lid of the vehicle, and the first transmission circuit is configured to operate when the operation member is operated. Trunk lid opening information and the first ID
A key device for a vehicle, wherein the key device transmits: 4. The vehicle key device according to claim 1, wherein the predetermined process of the second control circuit is a process for inhibiting operation of an engine. Key device. 5. The vehicle key device according to claim 1, wherein the vehicle is an electric vehicle using an electric motor as a driving source, and a predetermined process of the second control circuit is performed. Is a process for prohibiting the operation of the electric motor.