JP2010203074A - Electronic key system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic key system capable of inhibiting the unintended locking and unlocking of a door lock. <P>SOLUTION: This electronic key system includes: a key free function of making an ID code signal Sid automatically transmitted to the outside of a vehicle from an electronic key 1 by making the electronic key 1 respond to a request signal Srq transmitted from the vehicle 2, and of making the door lock automatically unlocked in the case of establishment of ID verification by the ID code signal Sid; and a wireless door lock function of locking and unlocking the door lock of the vehicle 2 by a remote-control operation performed by operating the electronic key 1. When doors 31-35 of the vehicle 2 are operated to be closed, the door lock is automatically locked by the key free function. The electronic key system further includes a delayed locking performing portion 21c which performs the automatic locking of the door lock by the key free function later than usual, when it detects that the doors 32-35 are operated to be unlocked or closed, after the door lock is unlocked by the wireless door lock function. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic key system that can perform locking and unlocking of a door lock based on whether or not external verification can be established between an electronic key and a vehicle.

  In recent years, many vehicles are equipped with an electronic key system that uses an electronic key capable of transmitting an ID code unique to the vehicle by wireless communication as a vehicle key. In this electronic key system, when the vehicle receives the ID code transmitted from the electronic key, the vehicle performs ID verification in which the ID code of the electronic key and the ID code registered in advance are checked. If the ID collation is established, the control of the in-vehicle device, for example, the locking / unlocking of the door lock of the vehicle and the start of the engine are permitted or executed (for example, see Patent Document 1).

  Some of these electronic key systems have a function (key-free function) in which the door lock is automatically unlocked when approaching the vehicle and the door lock is automatically locked when leaving the vehicle. In this function, a request for sending an ID code to the electronic key is always sent from the vehicle periodically to form a communication area around the vehicle, and when the electronic key receives this request, the electronic key is responded to it. The key transmits the ID code toward the vehicle, and the vehicle executes ID verification (external vehicle verification) using this ID code. When the outside verification is established, the door lock is automatically unlocked. On the other hand, when the ID code is not received or the outside identification is not established, the door lock is locked. In many cases, this function is provided only on the driver's seat door by forming a communication area only around the driver's seat door by installing an antenna for request transmission on the driver's seat door.

  In addition, this electronic key system has a wireless key system (wireless door lock function) that can lock and unlock the door lock by wirelessly transmitting a lock signal or an unlock signal to the vehicle by operating the button of the electronic key. include. In this wireless key system, a lock signal or an unlock signal including an ID code and a function code is transmitted by operating a lock button or an unlock button provided on an electronic key. If ID verification is established by performing wireless verification, locking or unlocking of the door lock is executed according to the function code.

JP 2002-29385 A

  By the way, in a vehicle equipped with this kind of electronic key system, for example, the door lock of the vehicle is unlocked by remote operation of the key by the wireless door lock function, and the rear seat door opposite to the driver's seat is opened to pack the luggage. There is a case. In this case, when the door is closed after the luggage is loaded, the key-free function operates on the condition that the door is closed, so that the vehicle outside verification according to the key-free function is executed. At this time, since the driver is in the vicinity of the rear seat door, communication with the outside of the driver's seat door and the vehicle cannot be established, and thus it is determined that the vehicle outside verification is not established, and automatic locking of the door lock is executed. It will be.

  In this case, if the rear seat door is closed and then brought closer to the driver's seat door, the door lock will be unlocked again when entering the communication area for the key-free function. Will be deceived. Therefore, there has been a demand not to execute such a locking operation not intended by the driver. In particular, in this type of vehicle, a lock sound is generated when the door lock is unlocked and locked, and thus there is a problem that the driver and the user feel uncomfortable when the door lock is unlocked.

  Note that this is not limited to vehicles that form a communication area around the driver's seat door, but is also applicable to vehicles that form a communication area around the vehicle. That is, after loading the luggage from the rear seat door and closing the door, if the door is removed from the communication area while moving from the rear seat door to the driver seat door, the door lock is locked at that timing, and the door lock is again locked. Unlocked. Therefore, an electronic key system in which the unlocking and unlocking of an unintended door lock is suppressed has been desired.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an electronic key system in which unintentional locking and unlocking of the door lock is suppressed.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
According to the first aspect of the present invention, an electronic key is responded to a request transmitted from the vehicle, an ID code is automatically transmitted from the electronic key to the outside of the vehicle, and the door lock is automatically performed when the ID verification by the ID code is established. A key-free function to be unlocked, and a wireless door lock function for locking and unlocking the door lock of the vehicle by remote operation by operating the electronic key, and when the door is closed, In the electronic key system in which the door lock is automatically locked by a key-free function, the key is detected when the door is opened and closed after the door lock is unlocked by the wireless door lock function. The gist of the invention is that it is provided with a delayed locking means for executing the automatic locking of the door lock by a free function with a delay than usual.

  According to this configuration, when the door is closed after being opened, automatic locking is executed in which the door lock of the vehicle is automatically locked by the key-free function, but the door lock is unlocked by the wireless door lock function. When the door is opened and closed, automatic locking is executed with a delay. For this reason, for example, the driver unlocks the vehicle door lock with the wireless door lock function, opens the rear seat door, loads the luggage into the car from there, closes the rear seat door, and then the driver drives from the rear seat. Even when moving to the seat, the automatic lock of the door lock by the key-free function is not executed. Therefore, when automatic locking of the door lock by the key-free function is executed, it becomes possible for the driver to gain time from the vicinity of the rear seat to the driver's seat. It becomes possible to make locking difficult to occur.

  According to a second aspect of the present invention, in the electronic key system according to the first aspect, the delay lock means delays the start of the ID collation by the key-free function by waiting for a predetermined time for the transmission of the request. The gist is to delay execution of locking the door lock.

  According to this configuration, by delaying the start of ID collation based on the key-free function, it is possible to prevent the door lock from being locked by an unintended key-free function. Further, in this case, useless transmission of requests is unnecessary, so that it is possible to reduce the power consumption required for this communication and to save energy in the key-free function.

  According to a third aspect of the present invention, in the electronic key system according to the first aspect, when the delay locking means detects the closing operation of the door, it operates the key-free function as usual and The non-establishment of ID verification in the free function is allowed for a certain period of time, and if the ID verification is established during the certain time, the unlocking of the door lock is maintained, and the ID verification even after the certain time has elapsed. If the above is not established, the gist is to lock the door lock.

  According to this configuration, no matter which door of the vehicle is closed, the conventional attempt to establish communication is made, so it is possible to successively monitor whether or not there is an electronic key around the vehicle. However, it is possible to delay the automatic locking of the door lock by the key-free function.

  According to a fourth aspect of the present invention, in the electronic key system according to any one of the first to third aspects, the delayed locking means is configured such that after the door lock is unlocked by the wireless door lock function, The gist of the invention is that when it is detected that the driver's seat door is opened and closed among the doors, the automatic locking of the door lock by the key-free function is not delayed and the automatic locking is executed in a normal operation.

  When the door lock is unlocked by the wireless door lock function and the driver's seat door is opened and closed, the driver is likely to leave the vehicle by loading or unloading luggage. Therefore, according to the above configuration, when the driver's door is opened and closed after the door lock is unlocked by the wireless door lock function, the automatic lock is executed as usual. When the vehicle door lock is unlocked, the driver's door is opened, the luggage is loaded or removed, and when leaving the vehicle, the door lock enters the lock without delay according to this series of operations. . Therefore, the door lock can be smoothly switched from the unlocked state to the locked state.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic key system by which the locking / unlocking of the unintended door lock was suppressed can be provided.

The block diagram which shows schematic structure of an electronic key system. The state diagram which shows the unlocking operation of an electronic key, the communication area of a vehicle, and a driver | operator's movement. The time chart which shows the delay locking operation | movement of the vehicle of an electronic key system. The flowchart which shows the delayed locking operation | movement of the vehicle at the time of unlocking by wireless collation. The time chart which shows the delay locking operation | movement of the vehicle of an electronic key system. The flowchart which shows the delayed locking operation | movement of the vehicle at the time of unlocking by wireless collation. The state diagram which shows the unlocking operation of an electronic key, the communication area of a vehicle, and a driver | operator's movement.

(First embodiment)
Hereinafter, a first embodiment in which an electronic key system according to the present invention is embodied will be described with reference to FIGS.

  As shown in FIG. 1, the vehicle 2 is equipped with an electronic key system capable of performing vehicle operations such as locking and unlocking a door lock without the driver actually operating the vehicle key, for example. . In the electronic key system, an electronic key 1 capable of transmitting a key-specific ID code by wireless communication is used as a vehicle key. The electronic key system transmits a request signal Srq as an ID code reply request from the vehicle 2, and when the electronic key 1 receives the request signal Srq, the electronic key 1 includes an ID code including its own ID code in response thereto. In this system, the code signal Sid is returned to the vehicle 2 by narrow-range wireless communication, and the door lock is unlocked or unlocked depending on whether or not the ID code of the electronic key 1 matches the ID code of the vehicle 2.

  The electronic key system of this example includes a key-free system (key-free function) in which the door 2 of the vehicle 2 is automatically locked and unlocked. For example, when the driver holding the electronic key 1 approaches the vehicle 2, all the door locks of the vehicle 2 are automatically locked, while the driver holding the electronic key 1 This is a system in which all door locks of the vehicle 2 are automatically unlocked when leaving. Further, the key-free system of this example is a system in which ID verification is executed only in the vicinity of the driver's seat of the vehicle 2, that is, the driver's seat door 31.

  The electronic key system will be described below. The vehicle 2 is provided with a verification ECU (Electronic Control Unit) 21 that performs ID verification when performing narrow-area wireless communication with the electronic key 1. The verification ECU 21 includes an out-of-vehicle LF transmitter 22 embedded in the driver's seat door 31 of the vehicle 2 and capable of transmitting an LF (Low Frequency) band signal to the outside of the vehicle, and an RF (Radio Frequency) embedded in the vehicle body behind the in-vehicle. ) An RF receiver 23 capable of receiving a band radio signal is connected. The out-of-vehicle LF transmitter 22 can transmit the request signal Srq from the out-of-vehicle LF transmission antenna 22a to the vicinity of the driver's seat door 31. The LF transmitter 22 outside the vehicle forms a communication area A1 for the request signal Srq around the driver's seat door 31 (see FIG. 2). In this example, the communication area A1 is also formed in the driver seat and the passenger seat in the vehicle so that the door lock cannot be locked when the electronic key 1 is left in the vehicle. The RF receiver 23 demodulates the signal in the RF band received by its own RF receiving antenna 23a, and outputs the demodulated signal to the verification ECU 21 as received data.

  For example, a main body ECU 26 that manages locking and unlocking of door locks and the like is connected to the verification ECU 21 via an in-vehicle LAN (Local Area Network) 25. The main body ECU 26 controls driving of the door lock devices 51 to 55 of the driver seat door 31, the passenger seat door 32, the rear seat left door 33, the rear seat right door 34, and the luggage door 35 based on a command from the verification ECU 21. To lock the door lock or unlock the door. Further, the main body ECU 26 outputs the opening and closing of the doors 31 to 35 to the verification ECU 21 based on the detection results from the courtesy switches 41 to 45 provided in the doors 31 to 35.

  On the other hand, the electronic key 1 is provided with a communication control unit 11 as a control unit for performing wireless communication with the vehicle 2 according to the electronic key system. Connected to the communication control unit 11 are an LF reception unit 12 capable of receiving an LF band signal transmitted externally and an RF transmission unit 13 capable of transmitting an RF band signal in accordance with a command from the communication control unit 11. Yes. The LF receiver 12 demodulates the LF band signal received by its own LF reception antenna 12a, and outputs the demodulated signal to the communication controller 11 as received data. The RF transmitter 13 modulates communication data obtained from the communication controller 11 and transmits an RF band ID code signal Sid including the unique ID code of the electronic key 1 from the RF transmitter antenna 13a.

  When the vehicle 2 is in a parked state (engine stopped and door lock locked), the verification ECU 21 periodically transmits a request signal Srq for the LF band from the outside LF transmitter 22 and communicates with the communication area A1 around the driver's seat door 31. Form. When the electronic key 1 enters the communication area A1 and receives the request signal Srq by the LF receiving unit 12, the electronic key 1 includes an ID code registered in its own memory 11a in response to the request signal Srq. An RF band ID code signal Sid is returned from the RF transmitter 13. When the ID code signal Sid is received by the RF receiver 23, the verification ECU 21 compares the ID code registered in its own memory 21a with the ID code of the electronic key 1 and performs ID verification (external vehicle verification). Although communication area A1 is also formed in the vehicle, this ID verification is hereinafter referred to as external verification. When the verification outside the vehicle is established, the verification ECU 21 outputs a door lock unlocking command to the main body ECU 26. The main body ECU 26 that has received the unlock command drives the door lock devices 51 to 55 to unlock the locked door lock.

  On the other hand, when the vehicle 2 is in a stopped state (engine stop and door lock unlocked state), the verification ECU 21 opens or closes any one of the doors 31 to 35 by a signal from the main body ECU 26 and any one of all the doors 31 to 35. If it is recognized that is closed, the request signal Srq is periodically transmitted from the outside LF transmitter 22 to form a communication area A1 around the driver's seat door 31. If the electronic key 1 leaves the communication area A1 and cannot receive the request signal Srq, the electronic key 1 does not return the ID code signal Sid. The verification ECU 21 outputs a door lock locking command to the main body ECU 26 when the outside verification is not established because the ID code signal Sid is not received by the RF receiver 23. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock. The vehicle 2 stops transmitting the request signal Srq when the door lock switch in the vehicle is operated to lock the door lock or the engine switch is operated to start the engine.

  In addition, the electronic key system has a wireless key system (wireless key system (wireless) as a function capable of wirelessly transmitting the locking signal S1 or the unlocking signal Sul to the vehicle 2 by operating the button of the electronic key 1 to lock and unlock the door lock. Door lock function). The vehicle 2 equipped with the wireless key system is provided with the above-described verification ECU 21 as a control unit of the wireless key system. The electronic key 1 is provided with a locking button 14 for transmitting a locking signal S1 and an unlocking button 15 for transmitting an unlocking signal Sul exposed on the surface of the casing (see FIG. 2). The lock button 14 and the unlock button 15 are connected to the communication control unit 11. The aforementioned RF transmitter 13 modulates the communication data obtained from the communication controller 11 and includes the unique ID code and function code of the electronic key 1 to generate an RF band locking signal S1 or unlocking signal Sul. It transmits from the RF transmission antenna 13a.

  When the lock button 14 is operated, the electronic key 1 transmits a lock signal Sl from the RF transmitter 13. When the verification ECU 21 receives the locking signal Sl by the RF receiver 23, the verification ECU 21 compares the ID code registered in its own memory 21 a with the ID code of the electronic key 1 and performs ID verification (wireless verification). When the wireless verification is established, the verification ECU 21 outputs a door lock locking command to the main body ECU 26. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock.

  In addition, when the unlock button 15 is operated, the electronic key 1 transmits an unlock signal Sul from the RF transmitter 13. When the verification ECU 21 receives the unlock signal Sul by the RF receiver 23, the verification ECU 21 performs ID verification (wireless verification) by comparing the ID code registered in its own memory 21a with the ID code of the electronic key 1. When the wireless verification is established, the verification ECU 21 outputs a door lock unlocking command to the main body ECU 26. The main body ECU 26 that has received the unlock command drives the door lock devices 51 to 55 to unlock the locked door lock.

  The collation ECU 21 unlocks the door lock when the door lock is unlocked by the wireless collation and the doors 31 to 35 are not opened or closed until a predetermined time Tw2 (for example, 30 seconds) elapses. Since maintaining the locked state is not preferable for crime prevention, a door lock locking command is output to the main body ECU 26. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock.

  The verification ECU 21 is provided with a counter 21b that counts time. The counter 21b starts counting when the door lock is unlocked by wireless verification, and outputs that the predetermined time Tw2 has elapsed when the predetermined time Tw2 is reached. When the verification ECU 21 recognizes that the predetermined time Tw2 has elapsed by the counter 21b, it outputs a door lock locking command to the main body ECU 26.

  In addition, the electronic key system of this example includes a delayed locking system (delayed locking function) that executes the locking operation by the key-free function after the door lock is unlocked by the wireless door lock function. By the way, since the execution condition of the key-free function is the door closing operation in this example, when the door lock is unlocked by the wireless door lock function and the doors 32 to 35 other than the driver's seat are opened and closed, An attempt to establish ID verification in the key-free function is also executed in this case. However, since the driver at this time is in the vicinity of the doors 32 to 35 other than the driver's seat, the outside verification is not established, so the driver simply closes the doors 32 to 35 other than the driver's seat before driving. Nevertheless, the door lock is locked against the driver's intention. Therefore, the delayed locking system of this example works to prevent this unintended locking switching.

  In this case, the verification ECU 21 is provided with a delayed locking execution unit 21c that can change the execution timing of the locking operation by the key-free function. The delayed locking execution unit 21c functions as a delayed locking means. The delayed locking execution unit 21c has unlocked the door by wireless verification, and has opened or closed any of the doors 32 to 35 other than the driver's seat by the courtesy switches 41 to 45 and closed all the doors 31 to 35. When it is recognized, the delayed locking mode is executed. That is, the delayed locking execution unit 21c does not immediately transmit the request signal Srq from the LF transmitter 22 outside the vehicle, and for example, the predetermined time Tw1 (corresponding to the time for the driver to move from the rear seat left door 33 to the driver seat door 31). For example, the request signal Srq is transmitted after 10 seconds). When the wireless verification is established, the delayed locking execution unit 21c stops transmitting the request signal Srq, and therefore restarts transmitting the request signal Srq after a predetermined time Tw1 has elapsed since the doors 32 to 35 other than the driver's seat are opened and closed. It will be. When the delayed lock execution unit 21c recognizes that the door lock has been unlocked by wireless verification, and that the driver's seat door 31 has been opened and closed and all the doors 31 to 35 have been closed, a request from the outside LF transmitter 22 is made. The transmission of the signal Srq is resumed.

  When the counter 21b receives a notification from the main body ECU 26 that any one of the doors 32 to 35 other than the driver's seat is opened and closed and all the doors 31 to 35 are closed, the counter 21b starts counting and reaches the predetermined time Tw1. The fact that the predetermined time Tw1 has elapsed is output. When the delay lock execution unit 21c recognizes that the predetermined time Tw1 has passed by the counter 21b, the delay lock execution unit 21c restarts the transmission of the request signal Srq from the vehicle outside LF transmitter 22 to perform vehicle outside verification.

  Next, the processing operation of the vehicle 2 when the door lock is unlocked by the wireless verification of the electronic key system and the doors 31 to 35 of the vehicle 2 are closed according to the time chart shown in FIG. 3 and the flowchart shown in FIG. explain. In this example, as shown in FIG. 2, the driver operates the unlock button 15 of the electronic key 1 to unlock the door lock by the wireless door lock function and opens the rear seat left door 33. An explanation will be given of a situation where a load is loaded, and after the load is loaded, the rear seat left door 33 is closed and moved to the driver's seat door 31. 4 is executed when any of the doors 31 to 35 is opened and closed in the unlocked state by the wireless door lock function.

  As shown in FIG. 3, the vehicle 2 periodically transmits a request signal Srq in a state where all the doors 31 to 35 are closed and the door lock is locked. When the vehicle 2 confirms that the wireless verification by the unlocking signal Sul transmitted from the electronic key 1 is established, the vehicle 2 stops transmitting the request signal Srq and releases the door lock as shown at timing T1 in FIG. Lock. That is, when the wireless verification by the unlock signal Sul is established, the verification ECU 21 determines that the electronic key 1 corresponding to the vehicle 2 and transmitting the unlock signal Sul exists near the vehicle 2. A door lock unlock command is output to the body ECU 26. The main body ECU 26 that has received the unlock command drives the door lock devices 51 to 55 to unlock the locked door lock. Further, if the electronic key 1 exists in the vicinity of the vehicle 2 but does not enter the communication area A1, the verification ECU 21 locks the unlocked door lock due to the failure of verification outside the vehicle. Stop outgoing calls.

  Note that if any of the doors 31 to 35 is not opened or closed by the wireless door lock function, the vehicle 2 locks the door lock after a predetermined time Tw2 has elapsed since the door lock was unlocked. That is, the verification ECU 21 receives a signal from the main body ECU 26 that any of the doors 31 to 35 has been opened / closed until a predetermined time Tw2 (for example, 30 seconds) elapses after the door lock is unlocked by wireless verification. Otherwise, it is recognized that the door is still unlocked by remote operation of wireless communication. Then, the collation ECU 21 outputs a door lock locking command to the main body ECU 26 because it is not preferable to keep the door lock in the unlocked state for crime prevention. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock.

  As shown in FIG. 4, when the vehicle 2 is opened and closed in a state where the door lock is unlocked by the wireless door lock function, whether or not the closed door is the driver's seat door 31. Is determined (step S1). That is, the verification ECU 21 determines whether or not the door 31 is the driver's seat door when receiving a signal from the main body ECU 26 that any of the doors 31 to 35 is closed. If the closed door is the driver's seat door 31 (step S1: YES), the vehicle 2 transmits a request signal Srq (step S5). That is, when receiving a signal indicating that the driver's seat door 31 has been closed from the main body ECU 26, the delayed locking execution unit 21c opens the driver's seat door 31 directly without opening the doors 32 to 35 other than the driver's seat, for example. It is determined that the user has left the vehicle after loading or unloading the baggage, and the request signal Srq is transmitted from the LF transmitter 22 outside the vehicle according to the normal operation format. The vehicle 2 does not need to be verified outside the vehicle when the door lock switch inside the vehicle is operated and the door lock is locked, or when the engine is operated and the engine is started, so the request signal Srq Stop outgoing calls.

  On the other hand, the vehicle 2 confirms that the closed door is not the driver's seat door 31, that is, the doors 32 to 35 other than the driver's seat (for example, the rear seat left door 33) are opened and closed (step S1: NO). A delay lock mode in which a request signal Srq is transmitted after a predetermined time Tw1 has elapsed since the door 31 other than the driver's seat is closed (step S2). That is, the delayed locking execution unit 21c determines that the driver has opened and closed the doors 32 to 35 other than the driver's seat to pack the luggage and the like, and the counter 21b counts as shown at the timing T2 in FIG. Start.

  The vehicle 2 has a predetermined time Tw1 (for example, 10 seconds) corresponding to the travel time from the doors 32 to 35 other than the driver seat to the driver seat door 31 after the doors 32 to 35 other than the driver seat are closed. It is determined whether or not elapses (step S4). That is, the delayed locking execution unit 21c checks whether or not the count of the counter 21b has reached the predetermined time Tw1. When the vehicle 2 confirms that the predetermined time Tw1 has not elapsed (step S4: NO), the vehicle 2 repeats the confirmation until the predetermined time Tw1 has elapsed.

  On the other hand, when confirming that the predetermined time Tw1 has elapsed (step S4: YES), the vehicle 2 transmits a request signal Srq (step S5). That is, when the delayed locking execution unit 21c confirms that the count of the counter 21b has reached the predetermined time Tw1, the request signal Srq is transmitted from the outside LF transmitter 22 at this timing, and the electronic signal is generated near the driver's seat door 31. Check for the presence of key 1. As described above, when the doors 32 to 35 other than the driver's seat are closed, the delayed locking execution unit 21c delays the transmission timing of the request signal Srq more than usual and confirms whether or not the vehicle outside verification is established. .

  Here, the vehicle 2 determines whether any of the doors 31 to 35 is opened or closed again after the predetermined time Tw1 has elapsed since any of the doors 32 to 35 other than the driver's seat is closed ( Step S3). That is, the collation ECU 21 moves from the doors 32 to 35 other than the driver seat to the driver seat door 31 to monitor whether the doors 31 to 35 are opened or closed while waiting for the transmission of the request signal Srq. It is determined whether or not the door 31 is opened and closed, or whether or not any of the doors 32 to 35 other than the driver's seat is opened and closed again. When the vehicle 2 confirms that any one of the doors 31 is opened and closed (step S3: YES), the vehicle 2 returns to step S1 and executes the above-described steps again.

  In addition, when the door opened / closed is the driver's seat door 31 (step S1: YES), the vehicle 2 transmits a request signal Srq (step S5) as indicated by the timing T3 in FIG. That is, when there is a signal from the main body ECU 26 that the driver's door 31 has been opened / closed, the delayed locking execution unit 21c determines that the driver's door 31 has been opened and loaded, taken out, and left the vehicle. Then, a request signal Srq is transmitted from the LF transmitter 22 outside the vehicle. When the opened / closed door is the door 32 to 35 other than the driver's seat (step S1: NO), the vehicle 2 executes the delayed locking mode again (step S2).

  When the vehicle 2 transmits the request signal Srq in step S5, the vehicle 2 determines whether or not vehicle outside verification is established (step S6). That is, the verification ECU 21 determines whether or not the electronic key 1 has entered the communication area A1. When the vehicle 2 confirms that the vehicle outside verification is established (step S6: YES), the vehicle 2 proceeds to step S5. That is, when the verification outside the vehicle is established, the verification ECU 21 determines that the electronic key 1 corresponding to the vehicle 2 has entered the communication area A1, and does not issue a command to the main body ECU 26 and maintains the door lock in the unlocked state.

  On the other hand, when it is confirmed that the vehicle outside verification is not established (step S6: NO), the vehicle 2 locks the door lock as shown at the timing T4 in FIG. 3 (step S7). That is, for example, the collation ECU 21 determines that the electronic key 1 corresponding to the vehicle 2 has not entered the communication area A1 because the doors 32 to 35 other than the driver's seat are opened and the luggage is packed and separated from the vehicle 2. A door lock locking command is output to the ECU 26. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock.

  Now, after the driver unlocks the door lock of the vehicle 2 by the wireless door lock function, opens the rear left door 33, loads the baggage into the vehicle from there, closes the rear left door 33, the request signal Srq The automatic locking is executed with a delay by restarting the transmission after the elapse of the predetermined time Tw1. For this reason, even if the driver moves from the rear seat left door 33 to the driver seat door 31, the automatic lock of the door lock by the key-free function is not executed. Therefore, when the automatic lock of the door lock by the key-free function is executed, it is possible to earn time until the driver moves from the doors 32 to 35 other than the driver's seat to the driver's seat door 31, which is not intended. It becomes possible to make it difficult to lock the door lock by the key-free function.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) After unlocking the door lock of the vehicle 2 by key remote operation by wireless communication, when the doors 32 to 35 other than the driver's seat are opened and closed, the automatic locking by the key-free function is started. Delay. Thus, even if the driver performs the unlocking and door opening / closing operations described above, the time until the driver moves to the driver's seat door 31 is secured, and at this time, the door is not locked. Therefore, it is not necessary to execute a door lock that is not intended by the driver.

  (2) By delaying the transmission of the request signal Srq from normal and delaying the start of execution of ID verification based on the key-free function, the door lock can be prevented from being locked by the unintended key-free function. Further, in this case, useless transmission of the request signal Srq is unnecessary, so that it is possible to reduce the power consumption required for this communication and to save energy of the key-free function. .

  (3) When the driver's seat door 31 is opened and closed after the door lock is unlocked by the key remote operation by wireless communication, the automatic locking is executed as usual. For this reason, for example, when the driver unlocks the door lock of the vehicle 2 by the wireless door lock function and opens the driver's seat door 31 to load or unload the luggage and leave the vehicle, the door lock is locked. Is executed. Therefore, it is possible to prevent the door lock, which is undesirable for crime prevention, from being unnecessarily maintained.

(Second Embodiment)
Hereinafter, a second embodiment of the electronic key system according to the present invention will be described with reference to FIGS. The electronic key system of this embodiment does not resume the transmission of the request signal Srq after the elapse of the predetermined time Tw1 in the delayed locking mode when the door is opened and closed after the door lock is unlocked by the wireless door lock function. Although the determination as to whether or not the vehicle outside verification is established is executed, the point of delaying the locking of the door lock (after the elapse of the predetermined time Tw3) is different from the first embodiment. Hereinafter, a description will be given focusing on differences from the first embodiment. Note that the electronic key system of this embodiment has the same configuration as the electronic key system of the first embodiment shown in FIG.

  In the delayed lock execution unit 21c, the door lock is unlocked by the wireless door lock function, and the doors 32 to 35 other than the driver's seat are opened and closed by the courtesy switches 41 to 45, and all the doors 31 to 35 are closed. When it is recognized, the delayed lock mode is entered. In the case of this example, a request signal Srq is transmitted from the outside LF transmitter 22 at the timing of the door closing operation, and a predetermined time Tw3 corresponding to the time for the driver to move from the rear seat left door 33 to the driver seat door 31, for example. The non-establishment of the outside verification in the key-free function is allowed during (for example, 10 seconds). That is, the delayed locking execution unit 21c can tolerate the request signal Srq without a response during the predetermined time Tw3. In short, the request is continuously transmitted during the predetermined time Tw2, It is monitored whether or not the ID code signal Sid is received.

  Further, when it is confirmed that the response to the request cannot be accepted after all during the delayed locking mode period, that is, the vehicle outside verification is not established, the delayed locking execution unit 21c locks all the door locks of the vehicle 2. In other words, the delayed locking execution unit 21c locks the door lock when a predetermined time Tw3 has elapsed since the outside verification is not established. When the delayed lock execution unit 21c recognizes that the door lock is unlocked by the wireless verification, and the driver's door 31 is opened and closed and all the doors 31 to 35 are closed, the external lock is performed. If it is confirmed that the vehicle outside verification is not established, the door lock is locked without waiting for the predetermined time Tw3.

  Next, the processing operation of the vehicle 2 when the door lock is unlocked by the wireless verification of the electronic key system and the doors 31 to 35 of the vehicle 2 are closed will be described according to the time chart shown in FIG. 5 and the flowchart shown in FIG. To do.

  As shown in FIG. 5, the vehicle 2 periodically transmits a request signal Srq in a state where all the doors 31 to 35 are closed and the door lock is locked. When the vehicle 2 confirms that the wireless verification by the unlock signal Sul transmitted from the electronic key 1 is established, the vehicle 2 stops transmitting the request signal Srq and unlocks the door as shown by the timing T1 in FIG. Lock.

  As shown in FIG. 6, the vehicle 2 transmits a request signal when the door is opened and closed in a state where the door lock is unlocked by the wireless door lock function (step S11), and the vehicle outside verification is established. It is determined whether or not it has been done (step S12). That is, when the verification ECU 21 receives a signal indicating that any one of the doors 31 to 35 is closed from the main body ECU 26, the verification ECU 21 transmits a request signal Srq from the outside LF transmitter 22, and the electronic key 1 enters the communication area A1. Judge whether or not. When the vehicle 2 confirms that the vehicle outside verification is established (step S12: YES), the vehicle 2 proceeds to step S1. That is, when the verification outside the vehicle is established, the verification ECU 21 determines that the electronic key 1 corresponding to the vehicle 2 has entered the communication area A1, and does not issue a command to the main body ECU 26 and maintains the door lock in the unlocked state.

  On the other hand, when the vehicle 2 confirms that the vehicle outside verification is not established (step S12: NO), the vehicle 2 determines whether or not the closed door is the driver's seat door 31 (step S13). That is, the verification ECU 21 moves from the doors 32 to 35 other than the driver seat to the driver seat door 31 and opens or closes the driver seat door 31 or again the doors 32 to 35 other than the driver seat. It is determined whether or not is opened and closed. If the closed door is the driver's seat door 31 (step S13: YES), the vehicle 2 proceeds to step S17. That is, when the delayed locking execution unit 21c receives a signal from the main body ECU 26 that the driver's seat door 31 has been opened and closed, for example, the driver opens the driver's seat door 31 as shown at timing T14 in FIG. Then, it is determined that the user has left the vehicle after loading or unloading, and the process proceeds to step S17.

  On the other hand, if the closed door is not the driver's seat door 31, that is, if the vehicle 2 is a door 32 to 35 other than the driver's seat (for example, the rear seat left door 33) (step S 13: NO), the vehicle outside verification is not established. After the predetermined time Tw3 has elapsed, a delayed locking mode for locking the door lock is executed (step S14). That is, the delayed locking execution unit 21c determines that the driver has opened and closed the doors 32 to 35 other than the driver's seat in order to pack the luggage, and executes the delayed locking mode. Here, the locking delay unit 21c starts counting by the counter 21b as indicated by a timing T13 in FIG. Then, the delayed locking execution unit 21c has a grace time of a predetermined time Tw3 (for example, 10 seconds), and whether the ID code signal Sid has been responded to the request signal Srq transmitted many times during this period. Whether or not (in essence, whether or not the vehicle outside verification is established) is monitored.

  The vehicle 2 determines whether or not a predetermined time Tw3 (for example, 10 seconds) has elapsed after confirming the door closing operation (step S16). That is, the delayed locking execution unit 21c checks whether or not the count of the counter 21b has reached the predetermined time Tw3. When the vehicle 2 confirms that the predetermined time Tw3 has not elapsed (step S16: NO), the vehicle 2 repeatedly executes the door closing operation confirmation until the predetermined time Tw3 has elapsed.

  On the other hand, when the vehicle 2 confirms that the predetermined time Tw3 has elapsed (step S16: YES), the vehicle 2 locks the door as shown by the timing T15 in FIG. 3 (step S17). That is, when the delayed locking execution unit 21c confirms that the count of the counter 21b has reached the predetermined time Tw3, for example, the door 2 to 35 other than the driver's seat is opened and the luggage is packed and the vehicle 2 is left. It is determined that the electronic key 1 corresponding to is not in the communication area A1, and a door lock locking command is output to the main body ECU 26. The main body ECU 26 that has received the locking command drives the door lock devices 51 to 55 to lock the unlocked door lock.

  Now, the driver unlocks the door lock of the vehicle 2 by the wireless door lock function, opens the rear seat left door 33, loads the luggage into the vehicle from there, closes the rear seat left door 33, and then sends a request signal Srq. The automatic locking is executed with a delay by allowing transmission and allowing the vehicle outside verification failure until the predetermined time Tw3 elapses. For this reason, even if the driver moves from the rear seat left door 33 to the driver seat door 31, the automatic lock of the door lock by the key-free function is not executed. Therefore, when automatic locking of the door lock by the key-free function is executed, it becomes possible to prevent the door lock from being locked by the unintended key-free function.

As described above, according to the embodiment described above, the following effects can be obtained in addition to the effects (1) and (3) of the first embodiment.
(4) After unlocking the door lock of the vehicle 2 by the key remote operation by wireless communication, when any door 31 to 35 of the vehicle 2 is opened and closed, an attempt to establish communication as usual is made. Made. Therefore, it is possible to delay the automatic locking of the door lock by the key-free function while sequentially monitoring whether or not the electronic key 1 is present around the vehicle 2.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, whether or not the electronic key 1 is in the vehicle is checked together by outside verification, but the vehicle is equipped with an in-vehicle LF transmitter and an in-vehicle LF transmitting antenna for transmitting the request signal Srq into the vehicle, ID collation (in-vehicle collation) may be performed, and external verification and in-vehicle verification may be performed separately.

  In the above embodiment, the communication area A1 is formed around the vehicle 2. However, as shown in FIG. 7, the outside LF transmitting antenna 22a is provided in each door 31 to 35, and the request signal Srq is sent to each door. You may make it form communication area A2 around the vehicle 2 by transmitting to the periphery of 31-35.

  -Moreover, when forming communication area A2 around the vehicle 2, you may make it perform delay locking mode, without distinguishing the driver's seat door 31 and the doors 32-35 other than a driver's seat. In detail, in 1st Embodiment, it is not determined whether it is the driver's seat door 31 of step S1 of FIG. 4, but it starts from step S2. Moreover, in 2nd Embodiment, it is not determined whether it is the driver's seat door 31 of FIG.6 S13, and it transfers to step S14 from step 12. FIG. That is, the counter 21b starts counting when it receives a notification from the main body ECU 26 that any one of the doors 31 to 35 including the driver's seat door 31 is opened and closed and all the doors 31 to 35 are closed.

  In this way, even in the vehicle 2 in which the communication area A2 is formed around the vehicle 2, when the door lock is automatically locked by the key-free function, the door lock is locked by the unintended key-free function. It becomes possible to make it difficult.

In the above embodiment, the predetermined time Tw1 may be arbitrarily changed as long as the driver can secure time for moving from the doors 32 to 35 other than the driver's seat to the driver's seat door 31.
In the above embodiment, the predetermined time Tw2 is arbitrarily changed as long as the driver can secure the time until the driver unlocks the door lock by the wireless door lock function and enters the communication areas A1 and A2 of the vehicle 2. May be.

In the above embodiment, the predetermined time Tw3 may be arbitrarily changed as long as the driver can secure time for moving from the doors 32 to 35 other than the driver's seat to the driver's seat door 31.
-The frequency of each communication used in the electronic key system may be any frequency radio wave. Further, with the key-free function, it is not necessary to make the frequency of each radio signal different between the communication from the vehicle 2 to the electronic key 1 and the communication from the electronic key 1 to the vehicle 2, and these may be the same.

  -The communication area that can communicate with the wireless door lock function and the communication areas A1 and A2 with the key-free function is usually wider than the communication area with the wireless door lock function. It may be.

  In this example, the door lock locking delay process may be, as a definition, execution of ID collation determination or actual operation of door lock locking (for example, start of operation of a door lock motor). Either one is acceptable.

  DESCRIPTION OF SYMBOLS 1 ... Electronic key, 2 ... Vehicle, 11 ... Communication control part, 11a ... Memory, 12 ... LF reception part, 12a ... LF reception antenna, 13 ... RF transmission part, 13a ... RF transmission antenna, 14 ... Lock button, 15 ... Unlock button, 21 ... Verification ECU, 21a ... Memory, 21b ... Counter, 21c ... Delayed lock execution unit, 22 ... Outside LF transmitter, 22a ... Outside LF transmitter antenna, 23 ... RF receiver, 23a ... RF receiver antenna, 25 ... In-vehicle LAN, 26 ... Main body ECU, 31 ... Driver seat door, 32 ... Passenger seat door, 33 ... Rear seat left door, 34 ... Rear seat right door, 35 ... Luggage door, 41-45 ... Courtesy switch, 51- 55 ... Door lock device, A1, A2 ... Communication area, Sl ... Lock signal, Sid ... ID code signal, Srq ... Request signal, Sul ... Unlock signal, Tw1, w2, Tw3 ... a predetermined period of time.

Claims (4)

A key-free function in which an electronic key is caused to respond to a request transmitted from the vehicle, an ID code is automatically transmitted from the electronic key to the outside of the vehicle, and if the ID verification by the ID code is established, the door lock is automatically unlocked; A wireless door lock function for locking and unlocking the door lock of the vehicle by remote control by operating the electronic key, and when the door is closed, the door lock is automatically locked by the key-free function. In an electronic key system where locking is performed,
Delay that executes automatic locking of the door lock by the key-free function with a delay than usual when detecting that the door is opened and closed after the door lock is unlocked by the wireless door lock function An electronic key system comprising a locking means. The electronic key system according to claim 1.
The electronic key system characterized in that the delayed locking means delays the execution of the door lock by delaying the start of the ID collation by the key-free function after waiting for the transmission of the request for a certain period of time. The electronic key system according to claim 1.
The delay locking means operates the key-free function as usual when detecting the closing operation of the door, and allows a non-establishment of ID verification in the key-free function for a certain period of time. The electronic key system is characterized in that the door lock is unlocked if the ID verification is established in the meantime, and the door lock is locked if the ID verification is not established even after the predetermined time has elapsed. . The electronic key system according to any one of claims 1 to 3,
When the delay lock means detects that the driver's seat door is opened and closed after the door lock is unlocked by the wireless door lock function, the door lock automatic lock by the key-free function is detected. An electronic key system characterized in that the automatic locking is executed in a normal operation without delaying the operation.

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