JP2001323698A - Electronic key device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify registration operation for plural IDs handled in different communication systems. SOLUTION: In this electronic key device for a vehicle to make wireless communication by plural systems between an electronic key and an on-vehicle device to receive the plural IDs from the electronic key, and conduct processes corresponding to the respective IDs based on result of collation with IDs preliminarily registered in the on-vehicle device, an operation knob 30 which can be operated to be rotated to a lock(LOCK) position to lock a steering wheel, an accessory(ACC) position to charge power to accessory devices, an ignition- on(ON) position to actuate an engine, and a start(ST) position to start the engine is provided. In a mode to register the IDs in the electronic key into the on-vehicle device, the registered IDs are changed in accordance with the set position of the operation knob 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless communication between an electronic key carried by an occupant and an in-vehicle device, and collating an ID received from the electronic key with a registered ID to determine whether to lock or unlock a door. The present invention relates to an electronic key device for a vehicle that determines whether to permit starting of an engine or an engine.

[0002]

2. Description of the Related Art Wireless communication is performed between a portable electronic key without a key plate and an in-vehicle device by radio waves, and a door unlock permission determination is made based on a collation result of a first ID code received from the electronic key. Further, there is known a vehicular electronic key device that determines whether to start an engine based on a result of collation of a second ID code received from an electronic key (for example, see Japanese Patent Application Laid-Open No. H11-36675).

When an ignition key is inserted into a key cylinder, radio communication is performed by high-frequency electromagnetic induction between a transponder embedded in the head of the ignition key and a transponder antenna embedded in the key cylinder. There is known a vehicle antitheft device that determines whether to start an engine based on a result of collating an ID received from an ignition key (for example, see Japanese Patent Application Laid-Open No. Sho 64-056253).

[0004]

By the way, a plurality of IDs are transmitted and received by wireless communication of different systems such as wireless communication by radio waves and wireless communication by electromagnetic induction to improve the reliability and safety of the vehicle key device. It is possible.

However, if a plurality of IDs are handled by these different wireless communication systems, the ID registration operation must be performed separately in the ID registration mode of each communication system, which complicates the ID registration operation. There is a problem.

An object of the present invention is to simplify the operation of registering a plurality of IDs handled by different communication methods.

[0007]

FIG. 1 shows an embodiment of the present invention.
The present invention will be described with reference to FIGS. 6 to 6. (1) The invention according to claim 1 is a processing mode in which a process corresponding to each ID is performed based on a result of collation with an ID registered in the in-vehicle device 1 in advance, and an electronic key And a registration mode for registering the 20 IDs in the in-vehicle device 1, and performing a wireless communication between the electronic key 20 and the in-vehicle device 1 by a plurality of methods to receive a plurality of IDs from the electronic key 20. A key device,
Lock (LOCK) position to lock the steering wheel, accessory (ACC) position to turn on power to accessory equipment, ignition on (ON) position to start the engine, and start (ST) to start the engine
The electronic key 2 includes an operation knob 30 that can be rotated to a position.
In the mode in which the ID of 0 is registered in the in-vehicle device 1, the operation knob 3
The ID to be registered is switched according to the set position of 0. (2) In the vehicle electronic key device according to the second aspect, in the wireless communication system, electric power is transmitted from the vehicle-mounted device 1 to the electronic key 20 by radio communication using radio waves and electromagnetic induction, and the electric power is used. Wireless communication (wireless communication by electromagnetic induction) for transmitting an ID from the electronic key 20 to the vehicle-mounted device 1 is included. (3) The electronic key device for a vehicle according to claim 3 receives the first ID and the second ID from the electronic key 20 by wireless communication using radio waves, and performs a lock / unlock permission determination and an engine start permission determination of a door. The third ID is received from the electronic key 20 by wireless communication using electromagnetic induction, and an engine start permission determination is made. (4) The electronic key device for a vehicle according to claim 4, wherein the plurality of IDs
If any of the IDs cannot be received from the electronic key, all the IDs of the electronic key 20 already registered are deleted and the registration mode is ended.

In the section of the means for solving the above-mentioned problems, a diagram of an embodiment is used for easy understanding of the description, but the present invention is not limited to the embodiment. .

[0009]

According to the first and second aspects of the present invention, in the mode in which the ID of the electronic key is registered in the in-vehicle device, the ID to be registered is switched according to the setting position of the operation knob. There is no need to separately perform ID registration processing for each method, and while improving the reliability and safety of the vehicle key device, a plurality of communication methods that use different communication methods by a simple operation similar to the operation when starting the engine. An ID can be registered at a time. (2) According to the third aspect of the invention, in addition to the effects of the first and second aspects, the antitheft performance of the vehicle can be improved. (3) According to the invention of claim 4, in the ID registration mode, if any of the plurality of IDs cannot be received from the electronic key, all the IDs of the electronic key 20 already registered are deleted. In this case, all the IDs set for each electronic key can be securely registered in the vehicle-mounted device, and only one of the plurality of IDs is registered. It is possible to prevent the registration processing from being terminated in a proper state and the antitheft performance from deteriorating.

[0010]

FIG. 1 shows the configuration of an on-vehicle apparatus according to an embodiment, and FIG. 2 shows an ignition knob. Also,
FIG. 3 shows a door handle and a door lock switch of a driver's seat door, and FIG. 4 shows a communicable range of a door antenna. FIG. 5 shows the configuration of the portable electronic key, and FIG. 6 shows the appearance of the portable electronic key.

An electronic key device for a vehicle according to one embodiment includes a vehicle-mounted device 1 (FIG. 1) installed in an instrument panel of a vehicle, for example, and an electronic key 20 that can be carried by an occupant.
(FIGS. 5 and 6), and an ignition switch unit (not shown) operated by an ignition knob 30 (FIG. 2).

First, the portable electronic key 20 shown in FIGS. 5 and 6 will be described. The portable electronic key 20 is shown in FIG.
As shown in FIG.
b, the cap portion 20a and the emergency key portion 20b
The emergency key portion 20b is provided with an emergency key 20c.

The electronic key 20 does not have a key plate like a conventional ignition key, but only has an emergency key 20c for use in an emergency.
On the other hand, the in-vehicle device 1 is not provided with a key cylinder unit that stores the electronic key 20, and the occupant may carry the electronic key 20 even when boarding the vehicle. Therefore, in this embodiment, an ignition switch unit (not shown) operated by an ignition knob 30 as shown in FIG. 3 is provided instead of the key cylinder unit of the conventional vehicle electronic key device. Installed on the instrument panel. Except in an emergency, there is no need to insert the electronic key 20 into the ignition switch unit.

An electronic key circuit 21 shown in FIG. 5 is incorporated in the cap portion 20a of the electronic key 20. The electronic key circuit 21 includes the antenna 23 and the electronic key controller 2
4 and a battery 25. The in-vehicle device 1 includes a first ID for permitting door lock and unlocking and a second ID for permitting engine start permission by radio communication using radio waves.
Send to The electronic key controller 24 includes a CPU 24a that controls communication with the vehicle-mounted device 1, and peripheral components such as a nonvolatile memory 24b that stores the first ID and the second ID. Battery 25 is an electronic key circuit 21
Is a replaceable battery for supplying power to the battery.

On the other hand, the transponder 22 shown in FIG. 5 is incorporated in the emergency key section 20b. The transponder 22 includes an antenna coil 26, a capacitor 27, and a nonvolatile memory 28, and transmits the third ID for engine start permission determination stored in the memory 28 to the in-vehicle device 1 by wireless communication using high-frequency electromagnetic induction. The wireless communication by the electromagnetic induction will be described later.

Next, the vehicle-mounted device 1 will be described with reference to FIG. An ignition switch unit (not shown) operated by the ignition knob 30 includes ignition switches 6, 7a, 7b that operate in conjunction with rotation of the ignition knob 30, and a steering lock unit 16 that locks a steering wheel. . The steering lock unit 16 has a knob rotation prohibition latch (not shown) for locking the ignition knob 30 to prohibit the rotation operation, and by driving the rotation prohibition latch to the unlock side, the ignition knob 30 and the steering wheel are locked. The wheel can be rotated.

As shown in FIG. 2, when the ignition knob 30 at the lock position (LOCK) of the steering wheel is depressed, the key switch 6 is turned on. When the ignition knob 30 is turned to an ignition on (ON) position for operating the engine, the ignition on switch 7a is turned on. Further, when the engine is turned to the engine start (START) position where the engine is started by the starter, the engine start switch 7b is turned on.

The switches 8a and 8b are door handle switches for starting the door unlocking process of the driver's door and the passenger's door, and are turned on when the door outside handles of the driver's door and the passenger's door are pulled. .

The switches 9a and 9b are door lock switches for starting the door lock process of the driver's seat door and the passenger's seat door, respectively. As shown in FIG. 3, the driver's door lock switch 9a is provided outside the vehicle around the door outside handle 41 of the driver's door 40,
It is operated from outside the vehicle when locking the vehicle door. Although only the driver's seat door is shown in FIG. 3, a door lock switch 9b is similarly provided on the passenger's seat door outside the vehicle around the door outside handle.

The switches 10a and 10b detect the locked / unlocked state of the driver's door and the passenger's door, respectively, and are turned off when the door lock mechanism (not shown) is locked, and unlocked. Turn on when in.

The on-vehicle device 1 includes transceivers 2, 3, 4, and 12 for performing wireless communication with the electronic key 20 by radio waves, and a transceiver 5 for performing wireless communication by high-frequency electromagnetic induction.
The transmitter 2 is installed on the driver's seat or the ceiling of the driver's seat, and transmits an “engine start signal” or the like to the electronic key 20 carried by the driver from the antenna 2a. By adjusting the directivity of the antenna 2a, the range in which the wireless communication can be performed between the in-vehicle device 1 and the portable device 20 via the antenna 2a is limited to the interior of the vehicle near the driver's seat. The communicable range may be a narrow range enough to cover the electronic key 20 carried by the driver in the driver's seat.

As shown in FIG. 4, the transmitter 3 is installed around a door outside handle 41 of a driver's seat door 40, and receives a "door lock signal" and "door lock signal" from a door antenna 3a.
A door unlock signal or the like is transmitted to the electronic key 20 carried by the occupant near the driver's seat door. By adjusting the directivity of the driver's door antenna 3a, the driver can communicate with the vehicle-mounted device 1 via the door antenna 3a. The range in which wireless communication is possible with the device 20 is a range 42 only outside the vehicle near the driver's seat door 40. The communicable range 42 is the driver's door 4
The range may be as small as 0, which is small enough to cover the range in which the occupant operates the door lock switch 9a to perform the door lock.

Similarly, the transmitter 4 is installed around the door outside handle of the passenger seat door 43, and the door antenna 4
an electronic key 2 carried by an occupant near a passenger's seat door, such as a "door lock signal" and a "door unlock signal" from a.
Send to 0. By adjusting the directivity of the door antenna 4a, the range in which wireless communication can be performed between the in-vehicle device 1 and the portable device 20 via the door antenna 4a is increased. And The communicable range 44 may be a narrow range near the passenger seat door 43 that can cover the range in which the occupant operates the door lock switch 9b to perform the door lock.

The receiver 12 is installed in a rear parcel at the rear of the vehicle, and receives an "engine start request signal", a "lock request signal", an "unlock request signal", an ID, and the like sent from the electronic key 20 via the antenna 12a. Receive.

The transmitter / receiver 5 is installed near an ignition switch unit (not shown) operated by an ignition knob 30. When radio communication using radio waves using the transmitter 2 and the receiver 12 cannot be performed, the antenna coil 5a is used.
Wireless communication by electromagnetic induction with the electronic key 20 through the electronic key 20, and the electronic key 20 is used to determine whether or not the engine start is permitted.
D is received.

When the engine cannot be started due to the inability of radio communication by radio waves, the emergency key 20 of the electronic key 20 is used.
The engine start operation can be performed by inserting c into the emergency key insertion slot 31 of the ignition knob 30 shown in FIG. In the ignition knob 30, the antenna coil 5a is embedded in a loop around the key insertion port 31, and when the emergency key 20c is inserted into the insertion port 31, it is built in the emergency key section 20b of the electronic key 20. The antenna coil 26 of the transponder 22 and the antenna coil 5a of the ignition knob 30 come close to each other.

The emergency key 20c is set to the ignition knob 3.
When a high-frequency pulse signal is output from the transceiver 5 to the antenna coil 5a in a state where the antenna coil 5a is inserted into the key insertion slot 31 of the electronic key 20, an electromagnetic induction action occurs between the antenna coil 5a of the ignition knob 3 and the antenna coil 26 of the electronic key 20. Works, an induced electromotive force is generated in the antenna coil 26 of the electronic key 20 and stored in the capacitor 27. The transponder 22 of the electronic key 20 uses the induced electromotive force stored in the capacitor 27 as transmission power,
A pulse signal representing the code of the third ID stored in 8 is output to the antenna coil 26. The pulse signal of the third ID is received by the transceiver 5 of the in-vehicle device 1 due to the electromagnetic induction between the antenna coil 26 and the antenna coil 5a of the in-vehicle device 1, and is demodulated into the third ID.

Wireless communication for transmitting electric power from the vehicle-mounted device 1 to the electronic key 20 using the electromagnetic induction effect and transmitting the ID from the electronic key to the vehicle-mounted device using the electric power is described below.
In this specification, it is simply called “wireless communication by electromagnetic induction”.

The locking / unlocking controller 13 has a CPU 13a.
And a non-volatile memory 13b. The door lock actuator 14 is drive-controlled to lock and unlock the driver's door, the passenger's seat door, and the rear seat door.

The engine controller 15 is a CPU 15
a, a non-volatile memory 15b, etc., and controls the rotation speed and output torque of the engine 2 by controlling the driving of a throttle valve control device (not shown), a fuel injection device (not shown), and an ignition device (not shown).

The passive control unit 11 has a CP
U11a, a non-volatile memory 11b, and the like, and wirelessly communicates with the electronic key 20 via the transceivers 2, 3, 4, 5, and 12, an ignition switch 6, 7a, 7b, a door handle switch 8a, 8b, a door lock. Switch 9
The lock / unlock controller 13 and the engine controller 15 are controlled in accordance with the operating states of the switches a and 9b and the lock state switches 10a and 10b to lock and unlock the vehicle doors and start and stop the engine.

The buzzer 17 sounds when the wireless communication with the electronic key 20 is not possible or when the ID collation result is inconsistent. Note that a speaker may be provided in place of the buzzer 17, and a warning may be given by sound.

In this embodiment, a first ID is used for door locking and unlocking, and a second ID different from the first ID is used for engine start permission determination. Further, the third ID is used for determining whether to allow the engine to start in an emergency such as when wireless communication using radio waves is not possible. These IDs are copied and registered in the memory 11b of the passive control unit 11 of the vehicle-mounted device 1 when the vehicle is shipped from the factory or when the vehicle is maintained at a service station.

FIGS. 7 to 9 are flowcharts showing the ID registration process. An ID registration process according to an embodiment will be described with reference to these flowcharts. When the vehicle is shipped from the factory,
Alternatively, during maintenance of the vehicle at the service factory, the operator connects the diagnostic device to the vehicle and performs a predetermined operation to set the ID registration mode. Note that the registration mode may be set in advance when the passive control unit 11 is delivered to the factory. Next, the worker
An operation for starting the ID registration process, that is, an operation of pushing the ignition knob 30 once is executed.

In step 1, normal processing such as door lock and unlock permission determination and engine start permission determination is prohibited. In the following step 2, it is confirmed whether or not the ignition knob 30 is depressed and the key switch 6 is turned on. If the key switch 6 is turned on, the process proceeds to step 3. In step 3, a first ID request is sent from the transmitter 2 and the antenna 2a on the driver's seat side to the electronic key 20.
Send to

When the electronic key 20 receives the first ID request transmitted from the vehicle-mounted device 1 by the antenna 23 of the electronic key circuit 21 in step 4, the process proceeds to step 5, and the electronic
The first ID is read from b and transmitted from the antenna 23 of the electronic key circuit 21 to the vehicle-mounted device 1.

The in-vehicle device 1 determines in step 6 that the antenna 12
a and the receiver 12 confirm whether the first ID has been received. In step 7, the first ID sent from the electronic key 20 is stored in the memory 11b and registered.

On the other hand, if the first ID has not been received from the electronic key 20, the process proceeds to step 8, and it is confirmed whether the reading process of the first ID has been executed N times. Even if the reading process of the first ID is executed N times, the first key is not transmitted from the electronic key 20.
If D has not been received, the process proceeds to step 9, where the buzzer 17 sounds and a warning is issued, and the ID registration process ends.
If the first ID reading process has not been performed N times, the process returns to step 3 and the above-described first ID reading process is repeated.

Here, after the registration of the first ID, the operator moves to the second ID.
An operation for starting the ID registration process, that is, an operation of pushing the ignition knob 30 twice is executed.

In step 11 after the first ID registration,
It is checked whether the key switch 6 has been turned off from on and whether it has been turned on again, that is, whether or not the pushing operation of the ignition knob 30 has been repeated twice. When this operation is performed, the process proceeds to step 12 and the transmitter 2 on the driver's seat side
And a second ID request from the antenna 2a to the electronic key 20.

When the electronic key 20 receives the first ID request transmitted from the on-vehicle device 1 by the antenna 23 of the electronic key circuit 21 in step 13, the process proceeds to step 14, in which the second ID is read from the memory 24b and the electronic key circuit 21 is read. From the antenna 23 to the on-vehicle device 1.

In step 15, the vehicle-mounted device 1
It is confirmed whether or not the second ID has been received by the receiver 2a and the receiver 12, and if received, the process proceeds to step S16. Step 1
At 6, the second ID sent from the electronic key 20 is stored in the memory 11.
b.

On the other hand, if the second ID has not been received from the electronic key 20, the process proceeds to step 17, where it is confirmed whether the reading process of the second ID has been executed N times. 2nd ID
Even if the reading process of N is executed N times,
If the ID has not been received, the process proceeds to step 18 where the first ID previously stored in the memory 11b is deleted, the registration is deleted, and the buzzer 17 is sounded to give a warning.
The D registration processing ends. If the second ID reading process has not been performed N times, the process returns to step 12, and the above-described second ID reading process is repeated.

In step 21 after the registration of the first ID and the second ID, the knob rotation prohibition latch of the steering lock unit 16 is driven to the unlock side to permit the rotation operation of the ignition knob 30 and unlock the steering wheel. .

Next, the operator performs an operation for starting the registration processing of the third ID, that is, inserts the emergency key 20c into the emergency insertion port 31 of the ignition knob 30,
The operation of turning the ignition knob 30 to the ignition ON position is executed.

In step 22, it is confirmed whether the ignition on switch 7a is turned on, that is, whether the ignition knob 30 is set to the ignition on position. If the ignition knob 30 is set to the ignition on position, the process proceeds to step 23. In step 23, the transceiver 5 outputs a high-frequency pulse signal to the antenna coil 5a in order to perform wireless communication with the electronic key 20 by electromagnetic induction.

The electronic key 20 stores the induced electromotive force induced in the antenna coil 26 of the transponder 22 in the capacitor 27 in step 24. Next step 25
Then, the memory 28 is stored by using the stored power of the capacitor 27.
The third ID is read from the
A pulse signal representing D is output.

In step 26, the vehicle-mounted device 1 checks whether or not the third ID has been received from the transponder 22 of the electronic key 20 by the antenna coil 5 a and the transceiver 5. In step 27, the third ID sent from the transponder 22 of the electronic key 20 is stored in the memory 11b and registered. Thereafter, the process proceeds to step 28, where the setting of the ID registration mode is cancelled, and the registration process ends.

On the other hand, the transponder 2 of the electronic key 20
Step 29 if the third ID cannot be received from 2
Then, it is determined whether the reading process of the third ID has been executed N times. If the third ID has not been received from the transponder 22 of the electronic key 20 even after executing the reading process of the third ID N times, the process proceeds to step 30, where the first ID and the second ID previously stored in the memory 11b are deleted and registered. Is deleted, the buzzer 17 is sounded and a warning is issued, and the ID registration process is terminated. If the third ID reading process has not been performed N times, the process returns to step 23, and the above-described third ID reading process is repeated.

As described above, the operation of pushing the ignition knob 30 once at the lock position, the operation of pushing twice at the lock position, and the emergency key 20c is inserted into the emergency insertion port 31 of the ignition knob 30 to turn the ignition knob The first ID, the second ID, and the third ID can be registered in order by performing an operation of setting the 30 to the ignition-on position, and a plurality of IDs handled by different communication methods of radio communication using radio waves and radio communication using electromagnetic induction can be registered. The registration can be performed at once by the same simple operation as the operation at the time of starting the engine, and there is no need to perform the registration process separately for each communication method.

Since the first, second, and third IDs are set to unique IDs for each electronic key 20, the on-board device 1
When copying and registering these three IDs, all three IDs must be registered. In the above-described embodiment, the registration of the first ID is followed by the registration of the second ID and the third ID.
When registering an ID, if even one of the second ID and the third ID cannot be read from the electronic key 20, the already registered ID of the electronic key 20 is deleted. It is possible to prevent the vehicle from being shipped or maintained in an incomplete state in which only one or two of the IDs are registered, and to improve the reliability and safety of the vehicle key device. it can.

Next, the registered first, second and third I
The door lock and unlock processing using D and the engine start processing will be described.

First, the door unlocking process will be described with reference to FIG. Here, the unlocking process of the driver's seat door 40 will be described, but the unlocking process of the passenger seat door 43 is the same as that of the driver's seat door 40,
The description of the unlocking process is omitted.

In step 41, when the occupant pulls the door outside handle 41 of the driver's seat door 40, the door handle switch 8a is turned on, and the unlock process of the driver's seat door 40 is started. In step 42, a door unlock signal is transmitted from the transmitter 3 of the driver's seat door 40 and the antenna 3a to the electronic key 20.

When the electronic key 20 receives the door unlock signal from the in-vehicle device 1 in step 43, the process proceeds to step 44, where the electronic key 20 transmits a door unlock request and a first ID to the in-vehicle device 1.

The in-vehicle device 1 determines in step 45 that the antenna 1
2a and the receiver 12 request the door unlock
It is confirmed whether or not the ID has been received. In step 46, the first ID received from the electronic key 20 is stored in the first ID registered in the memory 11b.
And if they match, the process proceeds to step 47.

When the door unlock request and the first ID are received from the electronic key 20 and the received first ID matches the registered first ID, the locking / unlocking controller 13 is controlled in step 47 to control the door lock actuator. 14, the vehicle doors 40 and 43 are unlocked.

On the other hand, if the door unlock request and the first ID cannot be received from the electronic key 20, or if the received first ID does not match the registered ID, the door 40,
The process is terminated without unlocking 43.

Next, the engine starting process will be described with reference to FIGS. In step 51, when the driver depresses the ignition knob 30, the key switch 6 is turned on to start the engine start processing. In step 52,
An engine start signal and a second ID request are transmitted from the transmitter 2 and the antenna 2a near the driver's seat in the vehicle compartment to the electronic key 20.

When the electronic key 20 receives the engine start signal and the second ID request from the in-vehicle device 1 in step 53, the process proceeds to step 54 and transmits the engine start request and the second ID to the in-vehicle device 1.

The in-vehicle device 1 determines in step 55 that the antenna 1
2a and the receiver 12 to request an engine start and the second I
Check if D has been received, and if received, go to step 5
Proceed to 6. In step 56, the second ID received from the electronic key 20 is stored in the second ID registered in the memory 11b.
And if they match, the process proceeds to step 61.

If the engine start request and the second ID cannot be received from the electronic key 20, or if the received second ID does not match the registered ID code, the process proceeds to step 70 where the emergency key 20c is used. Perform emergency engine start processing. The emergency engine start process will be described later.

An engine start request from the electronic key 20 and a second
When the ID is received and the received second ID matches the registered second ID, the steering lock unit 16 is controlled in step 61 to drive the knob rotation prohibition latch to the unlock side, and the rotation operation of the ignition knob 30 is performed. Allow and unlock the steering wheel.

In step 62, it is confirmed by the ignition on switch 7a whether the ignition knob 30 has been turned to the ignition on position. If the ignition knob 30 has been turned to the on position, the process proceeds to step 63, in which the engine controller 15 is permitted to start the engine. . Next, at step 64, it is confirmed by the engine start switch 7b whether or not the ignition knob 30 has been turned to the engine start position. When the ignition knob 30 has been turned to the start position, the routine proceeds to step 65, where the engine is started by the engine controller 15.

At step 66, it is confirmed by the ignition on switch 7a whether the ignition knob 30 has been turned to the accessory position. If the ignition knob 30 has been turned to the accessory position, the process proceeds to step 67, where the engine controller 15 stops the engine. In the following step 68, the ignition switch 3 is operated by the key switch 6.
0 is turned to the lock position, and if it is turned to the lock position, the routine proceeds to step 69, in which the steering lock unit 16 is controlled to drive the knob rotation prohibition latch to the lock side, and the ignition knob 30 and the steering wheel To lock.

The second ID is received by radio communication using radio waves,
If the second ID cannot be received from the electronic key 20 when the engine start process is performed, or if the second ID can be received but does not match the registered second ID, the buzzer 17 is turned off in step 70. Buzz and warn.

When this warning is given, the driver can start the engine using the emergency key 20c.
That is, wireless communication is performed with the electronic key 20 by electromagnetic induction to receive the third ID, and an emergency engine start process is performed.

In step 71, it is confirmed whether or not the ignition on switch 7a is turned on, that is, whether or not the driver has inserted the emergency key 20c into the emergency insertion port 31 of the ignition knob 30 to set the ignition on position. I do. Ignition knob 3
When 0 is set to the ignition on position, the routine proceeds to step 72. In step 72, the transceiver 5 outputs a high-frequency pulse signal to the antenna coil 5a.

In step 73, the electronic key 20 stores the induced electromotive force induced in the antenna coil 26 of the transponder 22 in the capacitor 27. Subsequent step 74
Then, the memory 28 is stored by using the stored power of the capacitor 27.
The third ID is read from the
A pulse signal representing D is output.

In step 75, the vehicle-mounted device 1 checks whether or not the third ID has been received from the transponder 22 of the electronic key 20 by the antenna coil 5 a and the transceiver 5. In step 76, the third ID sent from the transponder 22 of the electronic key 20 is compared with the third ID registered in the memory 11b. When the third ID sent from the electronic key 20 matches the registered third ID, the process proceeds to step 62, and the engine start process is performed as described above.

On the other hand, if the third ID cannot be received from the electronic key 20 by wireless communication using electromagnetic induction, or if the third ID received from the electronic key 20 does not match the registered third ID, the engine is permitted to start. The processing ends without performing.

Next, the door lock process will be described with reference to FIG. Here, the door lock process of the driver's seat door 40 will be described.
0 and the same as the passenger seat door 43, and the description of the door locking process of the passenger seat door 43 is omitted.

In step 81, when the driver pushes the door lock switch 9a of the driver's seat door 40, the switch 9a
Is turned on, and the locking process of the driver's seat door 40 is started. In step 82, a door lock signal is transmitted from the transmitter 3 and the antenna 3a of the driver's seat door 40 to the electronic key 20.

When the electronic key 20 receives the door lock signal from the vehicle-mounted device 1 in step 83, the process proceeds to step 84, where the electronic key 20 transmits a door lock request and a first ID to the vehicle-mounted device 1.

The in-vehicle device 1 determines in step 85 that the antenna 1
Door lock request and first ID by 2a and receiver 12
It is checked whether or not it has been received.
Proceed to. In step 86, the first ID received from the electronic key 20 is compared with the first ID code registered in the memory 11b, and if they match, the process proceeds to step 87.

The door lock request from the electronic key 20 and the first I
D, and when the received first ID and the registered ID code match, in step 87, the locking / unlocking controller 1
3 is controlled to lock the vehicle doors 40 and 43 by the door lock actuator 14.

On the other hand, if the door lock request and the first ID cannot be received from the electronic key 20 or if the received first
If the ID does not match the registered ID code, the flow advances to step 88 to lock the doors 40 and 43 without locking the buzzer 17.
Is sounded and a warning is given, and the process ends.

In the above-described embodiment, the example in which the emergency key 20c is provided on the electronic key 20 is shown. However, the electronic key is not provided with the emergency key, and the electronic key is replaced with an arbitrary plate or bar. It may be formed in a shape and stored in a predetermined position in the vehicle interior. In this case, an antenna coil for performing wireless communication by electromagnetic induction is installed in the electronic key storage unit, and the third ID is exchanged with the antenna coil of the transponder of the electronic key.

In the above-described embodiment, the wireless communication by electromagnetic induction between the electronic key and the on-vehicle device is performed when the wireless communication by radio waves is disabled or the ID received by the radio communication by radio waves is the registered ID. An example in which they do not match is used as an emergency communication means. However, it is not necessary to use wireless communication by electromagnetic induction as an emergency communication means,
Radio communication using radio waves may be used as emergency communication means, and radio communication using electromagnetic induction may be used as normal communication means. Alternatively, one of radio communication using radio waves and radio communication using electromagnetic induction may be arbitrarily or automatically selected. In the former case, a selection switch is provided to allow the driver to make a selection.In the latter case, for example, when the driver stores the electronic key in a predetermined storage unit, the driver selects radio communication by electromagnetic induction. Select wireless communication using radio waves. Here, the predetermined storage unit is a facility for storing an electronic key such as the insertion port 31 of the above-described embodiment.

Further, in the above-described embodiment, an example is given in which different IDs are used for the ID transmitted and received by wireless communication using radio waves, for the first ID for judging permission of door lock and unlocking and the second ID for judging permission of starting the engine. However, the first ID and the second ID may be the same.

Further, in the above-described embodiment, wireless communication using radio waves and wireless communication using electromagnetic induction have been described as examples. However, the wireless communication system is not limited to this embodiment, and other than the above-described system. Wireless communication systems using light or ultrasonic waves.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an in-vehicle device according to an embodiment.

FIG. 2 is a view showing an ignition knob.

FIG. 3 is a view showing a door handle and a door lock switch of a driver's seat door.

FIG. 4 is a diagram showing a communicable range of a door antenna.

FIG. 5 is a diagram showing a configuration of a portable electronic key according to one embodiment.

FIG. 6 is a diagram illustrating an appearance of a portable electronic key according to one embodiment.

FIG. 7 is a flowchart illustrating an ID registration process according to one embodiment;

FIG. 8 is a flowchart showing an ID registration process of the embodiment, following FIG. 7;

FIG. 9 is a flowchart showing an ID registration process of the embodiment, following FIG. 8;

FIG. 10 is a flowchart showing a door unlocking process according to one embodiment.

FIG. 11 is a flowchart showing an engine start process according to one embodiment.

FIG. 12 is a flowchart showing an engine start process of the embodiment, continued from FIG. 11;

FIG. 13 is a flowchart showing an engine start process of the embodiment, continued from FIG. 12;

FIG. 14 is a flowchart showing a door lock process according to one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 On-vehicle apparatus 2-4 Transmitter 2a-4a Antenna 5 Transceiver 5a Antenna coil 6 Key switch 7a Ignition on switch 7b Engine start switch 8a Driver's door handle switch 8b Passenger's door handle switch 9a Door lock switch of driver's door 9b Door lock switch for passenger seat door 10a Lock switch for driver seat door 10b Lock switch for passenger seat door 11 Passive control unit 11a CPU 11b Memory 12 Receiver 12a Antenna 13 Locking / unlocking controller 13a CPU 13b Memory 14 Door lock actuator 15 Engine controller 15a CPU 15b Memory 16 Steering lock unit 17 Buzzer 20 Electronic key 20a Emergency key unit 20b Cap part 20c Emergency key 21 Electronic key circuit 22 Transponder 23 Antenna 24 Electronic key controller 24a CPU 24b Memory 25 Battery 26 Antenna coil 27 Capacitor 28 Memory 30 Ignition knob 31 Key slot 40 Driver's door 41 Driver's door outside handle 42 Driver's seat communication range 43 Passenger's seat door 44 Passenger's seat communication range

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B60R 25/04 608 B60R 25/04 608 25/10 601 25/10 601 617 617 E05B 65/12 E05B 65/12 A 65 / 20 65/20

Claims (4)

[Claims] 1. A processing mode for performing a process corresponding to each ID based on a result of comparison with an ID registered in the on-vehicle device in advance, and a registration mode for registering the ID of the electronic key in the on-vehicle device,
A vehicular electronic key device that receives a plurality of IDs from an electronic key by performing wireless communication between the electronic key and an in-vehicle device by a plurality of methods, a lock position for locking a steering wheel, and turning on power to accessory devices. It has an operation knob that can be rotated to the accessory position to operate, the ignition on position to start the engine, and the start position to start the engine. In the mode of registering the ID of the electronic key to the in-vehicle device, it is registered according to the setting position of the operation knob An electronic key device for a vehicle characterized by switching an ID to be used. 2. The electronic key device for a vehicle according to claim 1, wherein in the wireless communication system, electric power is transmitted from the vehicle-mounted device to the electronic key by radio communication using radio waves and electromagnetic induction, and the electric power is transmitted. An electronic key device for a vehicle, including wireless communication for transmitting an ID from an electronic key to an in-vehicle device using the wireless key (hereinafter referred to as wireless communication by electromagnetic induction). 3. The electronic key device for a vehicle according to claim 2, wherein the first ID and the second ID are transmitted from the electronic key by radio communication using radio waves.
Receiving a third ID from an electronic key by wireless communication using electromagnetic induction and making an engine start permission determination while receiving a lock / unlock permission determination of a door and an engine start permission determination. Electronic key device. 4. The electronic key device for a vehicle according to claim 1, wherein any of the plurality of IDs cannot be received from the electronic key in the ID registration mode. Is a vehicle electronic key device for deleting all registered electronic key IDs and terminating the registration mode.