JP2010077665A - Smart entry system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user holding another portable machine to unlock a vehicle door by utilizing a smart entry system, even in a situation in which a portable machine is locked in the interior of a vehicle. <P>SOLUTION: An ID code of the portable machine 1, which is locked in the interior of the vehicle, is acquired by checking in the interior of the vehicle and stored. When periodical checking outside the interior of the vehicle is performed in the parking of the vehicle, it is determined whether or not the portable machine 1 sending back a response signal in response to request signals of transmitters 2a-2d outside the interior of the vehicle is the portable machine 1 locked in the interior of the vehicle, on the basis of the stored ID code. When the portable machine 1 locked in the interior of the vehicle does not respond to the request signals from the transmitters 2a-2d, the periodical checking outside the interior of the vehicle is continued. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a smart entry system in which a portable device and a vehicle side unit communicate with each other and control locking / unlocking of a vehicle door based on the communication result.

  Conventionally, as a smart entry system as described above, for example, a system disclosed in Patent Document 1 is known. In the system described in Patent Document 1, the communication between the main body device (vehicle side unit) and the portable transceiver (portable device) is triggered by the operation of the switch provided on the door handle of the vehicle door. When a normal response signal is obtained from the portable device, the vehicle door is locked by the vehicle side unit.

  In this system, when the door is locked, a small output confirmation signal and a high output confirmation signal are output from the vehicle side unit in order to prevent the portable device from being left behind in the vehicle interior. In other words, since the receivable range of the small output confirmation signal by the portable device is preset to be almost the same as that in the vehicle interior, if there is a response to the small output confirmation signal, the portable device is left in the vehicle interior It can be judged. In this case, the door lock is not executed, and a misplacement warning is issued to the driver of the vehicle.

When there is no response to the small output signal, a high output confirmation signal is continuously transmitted to confirm whether there is a response from the portable device. The receivable range of the large output confirmation signal is set to include a predetermined range in the vicinity of the vehicle body. Therefore, when there is a response from the portable device to the large output confirmation signal, the vehicle-side unit is It is determined that the user holding is outside the vehicle, and the door is locked.
JP-A-10-59131

  Here, in the smart entry system as described above, a plurality of portable devices may be prepared in consideration of the case where there are a plurality of users who use the vehicle. When a plurality of portable devices are prepared in this way, even if a user holding the portable device goes out of the vehicle, other portable devices may remain in the vehicle interior. In this case, in the current smart entry system, even if the user holding the portable device tries to lock the door by operating the switch provided on the door handle, other portable devices remain in the vehicle interior. In order to prevent theft of a vehicle using a portable device, the door is not locked and a misplacement alarm is issued as in the prior art described above.

  However, in the current smart entry system, a mechanical key is generally prepared separately so that the vehicle door can be locked and unlocked even when the battery runs out of the portable device. In consideration of user convenience, a wireless lock function and a wireless unlock function are often provided. These wireless lock function and wireless unlock function are the one-way communication from the portable device to the vehicle side unit by the user operating the lock switch and unlock switch provided in the portable device, This is a function that can lock and unlock the vehicle door.

  When the vehicle door is locked using the mechanical key or the wireless lock function described above, the vehicle door can be locked even when the portable device remains in the vehicle interior. As a result, a situation in which the portable device is confined in the vehicle interior may occur.

  In order to unlock the vehicle door, the smart entry system usually requests to form a predetermined communication area outside the passenger compartment in order to detect that the user holding the portable device has approached the vehicle. A signal is output. When the portable device exists in the communication area, a response signal is returned in response to the request signal. Based on the reception of this response signal, the vehicle side unit detects that the user holding the portable device is approaching the vehicle, for example, when the touch sensor detects that the user has touched the door handle, Unlock the vehicle door.

  However, radio waves for forming the outside communication area leak into the vehicle interior, and the portable device remaining in the vehicle interior returns a response signal in response to the request signal for forming the outside communication area. As a result, a third party who does not hold the portable device can unlock the vehicle door. Furthermore, if the portable device confined in the vehicle interior repeats the return of the response signal in response to the periodic request signal transmission, the battery of the portable device is consumed. For this reason, in the current smart entry system, when the door of the vehicle is locked, a request signal for making the vehicle interior a communication area is transmitted, and based on the presence or absence of a response signal from the mobile device, the portable device Check whether or not is left. And when it is detected that the portable device is left in the vehicle interior, the transmission of the request signal for forming the communication area outside the vehicle interior is stopped, and a third party who does not hold the portable device The vehicle door cannot be unlocked.

  However, as described above, if the transmission of the request signal for forming the outside communication area is completely stopped, the user holding the portable device also unlocks the vehicle door using the smart entry system. It becomes impossible to do.

  The present invention has been made in view of the above-described points, and even if the portable device is confined in the passenger compartment, if the user holds another portable device, the smart entry system is used. It is an object to provide a smart entry system capable of unlocking a vehicle door.

In order to achieve the above object, the smart entry system according to claim 1 performs mutual communication in which a portable device returns a response signal including an ID code in response to a request signal transmitted from a vehicle-side unit. As a result, the vehicle-side unit has received a response signal from the portable device, collated the ID code included in the response signal with a pre-registered registration code, and obtained a collation result that the collation was established. In a smart entry system that controls locking / unlocking of vehicle doors,
A plurality of portable devices are prepared, and the plurality of portable devices are provided with portable device identification codes capable of mutually identifying each portable device, and the vehicle side unit communicates with the portable device through mutual communication. To obtain the portable device identification code of the portable device,
The vehicle side unit
A receiver for receiving a response signal from the portable device and a vehicle outside the vehicle as a communication area with the portable device, and an outdoor transmitter for transmitting a request signal to the outside of the vehicle,
A vehicle interior transmitter that transmits a request signal toward the vehicle interior, where the vehicle interior of the vehicle is a communication area with the portable device,
When all the doors of the vehicle are locked, the vehicle interior transmitter transmits a request signal. When the receiver receives a response signal in response to the request signal, the mobile phone acquired through the mutual communication is obtained. An identification code storage means for storing a machine identification code as a portable machine identification code of a portable machine confined in the vehicle interior;
When the vehicle is parked with all the doors of the vehicle locked, a request signal is periodically transmitted from the transmitter outside the vehicle compartment, and a response signal is received in response to the request signal. Unlock permission means for permitting unlocking of the door that the user holding the portable device is approaching based on the verification of the ID code included in the signal;
An unlocking means for unlocking the door according to the unlocking permission by the unlocking permission means,
The unlock permission means stores the portable device identification code in the identification code storage means when the portable device identification code is acquired through mutual communication with the portable device when the request signal is transmitted from the transmitter outside the vehicle compartment. The transmission of a periodic request signal using an out-of-vehicle transmitter is continued on condition that the mobile device identification code does not match.

  Even if the portable device is confined in the vehicle interior, if the portable device does not return a response signal to the request signal from the vehicle exterior transmitter, a third party who does not hold the portable device will Cannot be unlocked. Moreover, there is no possibility that the battery of the portable device confined in the passenger compartment is consumed.

  According to the first aspect of the present invention, when the vehicle door is locked, a request signal is transmitted from the vehicle interior transmitter. Then, when mutual communication with the portable device is performed in response to the request signal, it is assumed that there is a portable device confined in the passenger compartment, and the portable device identification code obtained through the mutual communication is stored. . Since the portable device identification code of the portable device confined in the vehicle interior is stored in this way, when a response signal is received when a periodic request signal is transmitted from the transmitter outside the vehicle interior, the response signal is returned. It can be determined whether or not the portable device is a portable device confined in the vehicle interior. When a portable device other than the portable device confined in the vehicle interior returns a response signal or does not receive a response signal, that is, the portable device confined in the vehicle interior receives a request signal from the transmitter outside the vehicle interior. If the mobile phone does not respond to the request, a third party who does not hold the portable device cannot unlock the vehicle door even if the transmission of the periodic request signal is continued from the transmitter outside the vehicle compartment. Moreover, the battery of the portable device confined in the passenger compartment is not consumed. Therefore, when the response signal is not received from the portable device confined in the vehicle interior, the transmission of the periodic request signal from the transmitter outside the vehicle interior is continued. Thus, a user holding another portable device can unlock the vehicle door using the smart entry system.

  As the portable device identification code described above, as described in claim 2, an ID code assigned differently to each portable device may be used, or as described in claim 3. In addition, a key number code indicating the key number of each portable device may be used. In any case, the portable device confined in the passenger compartment can be identified.

  Further, as described in claim 4, it is preferable that the portable device identification code storage means execute mutual communication for obtaining portable device identification codes for all portable devices. When a plurality of portable devices are prepared, a plurality of portable devices may be confined in the vehicle interior. With the configuration described above, when a plurality of portable devices are confined in the vehicle interior, the portable device identification code storage means can store the portable device identification codes of all of the confined portable devices.

  Hereinafter, a smart entry system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing the overall configuration of the smart entry system according to the present embodiment.

  The smart entry system in this embodiment controls the locked / unlocked state of each door based on the collation result of the ID code by mutual communication between the portable device 1 and the vehicle side unit. In addition, the vehicle-side unit also controls the permission / prohibition state of the engine start of the vehicle 10 based on the ID code collation result in order to improve the security of the vehicle 10.

  As shown in FIG. 1, the portable device 1 is a receiver 1a that receives a request signal from the vehicle interior side transmitters 2a to 2d or the vehicle interior transmitter 2e of the vehicle side unit, in response to reception of this request signal, A transmitter 1b that transmits a response signal including an ID code and the like is provided. The portable device ECU 1c is connected to the receiver 1a and the transmitter 1b described above, and executes various control processes. Specifically, the portable device ECU 1c determines whether or not a request signal has been received based on the reception signal of the receiver 1a, or generates a response signal including an ID code in response to the reception of the request signal. Or transmitting from the transmitter 1b.

  A plurality of portable devices 1 (for example, four) are prepared, but the electrical configuration of each portable device 1 is common. However, each portable device 1 responds to a response signal from the vehicle side unit, a vehicle code indicating a vehicle on which the smart entry system is mounted, a key number code indicating a key number of each portable device 1, and an ID I remember the code. Among these codes, the vehicle code is common to each portable device 1, but the key number code and the ID code are different for each portable device 1.

  Although not shown in the drawings, a mechanical key is attached to the portable device 1 so that the vehicle doors 11 to 14 can be locked and unlocked even when the battery runs out in the portable device 1. Furthermore, the portable device 1 is provided with a lock switch and an unlock switch (not shown) in order to improve user convenience. When the user operates these lock switches and unlock switches, a lock instruction signal or an unlock instruction signal is transmitted from the portable device 1 to the vehicle unit (unidirectional communication). These unlock instruction signal and unlock instruction signal include the above-described ID code, and in the vehicle side unit, when the verification of the ID code is established, according to the lock instruction signal and the unlock instruction signal, The vehicle doors 11 to 14 are locked or unlocked. Thus, the smart entry system of the present embodiment also has a wireless lock function and a wireless unlock function.

  The vehicle-side unit includes vehicle interior transmitters 2 a to 2 d provided on the doors 11 to 14 of the vehicle 10 and a vehicle interior transmitter 2 e provided in the vehicle interior. The vehicle interior transmitters 2a to 2d and the vehicle interior transmitter 2e transmit a request signal based on a transmission instruction signal from the verification ECU 4 of the vehicle side unit.

  As shown in FIG. 2, the reach distances of the request signals from the vehicle interior transmitters 2 a to 2 d are set to about 0.7 to 1.0 m, for example, around each vehicle door 11 to 14. When the vehicle 10 with the doors 11 to 14 of the vehicle locked is parked, a communication area with the portable device 1 corresponding to the reach distance of the request signal is periodically formed around each door 11 to 14 of the vehicle 10. Thus, it is possible to detect that the holder of the portable device 1 has approached the vehicle 10. In addition, although the vehicle interior transmitters 2a to 2d transmit request signals outside the vehicle interior, the radio waves may leak somewhat into the vehicle interior as indicated by the dotted line in FIG. For this reason, the portable device 1 may react to request signals from the vehicle exterior transmitters 2a to 2d while being in the vehicle interior.

  The communication area with the portable device 1 by the vehicle interior transmitter 2e is formed so as to cover the vehicle interior when the driver's door 11 of the vehicle 10 is opened and closed, when the engine is started, when the door is locked, etc. It is detected whether 1 is in the passenger compartment. The vehicle interior transmitter 2e includes, for example, a front seat vehicle interior transmitter having a communication area mainly covering the front seat, a rear seat vehicle interior transmitter having a communication area mainly covering the rear seat, You may comprise from the transmitter for luggage compartments which has a communication area which covers luggage compartments, such as a trunk. In this case, the total communication area combining the communication areas of the front seat vehicle interior transmitter, the rear seat vehicle interior transmitter, and the cargo room transmitter covers the entire vehicle interior.

  The vehicle-side unit is provided in the vehicle interior of the vehicle 10, is made a response signal receivable state in synchronization with the output of transmission instruction signals to the transmitters 2 a to 2 e, and receives a response signal transmitted from the portable device 1. It has a receiver 3. The response signal received by the receiver 3 is output to the verification ECU 4. The collation ECU 4 collates whether or not the ID code included in the received response signal satisfies a predetermined relationship such as coincidence with a registered code registered in advance. In the verification ECU 4, the vehicle code, the key number code of each portable device 1, and the ID code of each portable device 1 are registered in advance. In particular, the key number code and the ID code are stored in association with each portable device 1.

  Then, the verification ECU 4 works with the body ECU 7 and the power supply ECU 8 depending on whether the verification of the received ID code is OK (established) or NG (not established), and permits / stops the engine start / stop state. To control.

  The power supply ECU 8 controls the supply and stop of power to each device mounted on the vehicle. The power supply ECU 8 receives signals from sensors and switches (SW) in order to determine whether or not a condition for starting the engine is satisfied. Specifically, an engine switch that is provided near the driver's seat and is operated by a user to instruct start / stop of the engine, a vehicle speed sensor that detects a traveling speed of the vehicle, a shift position sensor that detects a shift position of the transmission, In addition, signals such as a stop lamp switch that outputs an ON signal when the brake pedal is operated by the driver and a door courtesy lamp switch that detects opening and closing of the door are input to the power supply ECU 8.

  For example, when the engine pedal is operated when the brake pedal is depressed, the shift position is parking, and the vehicle speed is zero, the power supply ECU 8 uses the vehicle interior transmitter 2e with respect to the verification ECU 4. An inquiry is made as to whether or not the ID code collation is OK through mutual communication with the portable device 1. If there is a response from the verification ECU 4 to the vehicle interior verification OK in response to this inquiry, it is determined that the conditions for starting the engine are satisfied. In this case, the relay circuit 8a is driven, and power is supplied to each vehicle-mounted device from a battery (not shown) via the relay circuit 8a. Further, in synchronization with the response to the vehicle interior verification OK to the power supply ECU 8, the verification ECU 4 instructs the engine ECU 9 to release the immobilizer. As a result, the engine ECU 9 can start the engine. In addition, collation ECU4 performs immobilizer setting instruction | indication with respect to engine ECU9 simultaneously with execution of door lock control, and sets an engine to a starting prohibition state.

  The body ECU 7 outputs a drive signal for controlling the lock / unlock state of the vehicle doors 11 to 14 to the lock control units 5a to 5d in response to the lock instruction and the unlock instruction from the verification ECU 4. .

  The lock control units 5 a to 5 d are provided at the doors 11 to 14 of the vehicle 10, and lock and unlock the doors 11 to 14 according to a drive signal from the body ECU 7. Specifically, the lock control units 5a to 5d have a door lock motor that rotates forward / reversely according to a lock signal / unlock signal transmitted from the body ECU 7, and each vehicle door 11 is rotated by the rotation of the door lock motor. Lock or unlock ~ 14.

  The door handles 6a to 6d of the doors 11 to 14 of the vehicle 10 are provided with touch sensors 6a1 to 6d1, and the holder of the portable device 1 touches the door handles 6a to 6d to thereby touch the door handles 6a to 6d. It is possible to detect that an operation has been performed on. The door handles 6a to 6d are also provided with door lock switches 6a2 to 6d2 configured as push switches. When the door lock switches 6a2 to 6d2 are operated, the doors 11 to 14 can be locked. Further, the door handles 6a to 6d also serve as antennas for the above-described vehicle interior transmitters 2a to 2d.

  In addition, the detection of the operation with respect to the vehicle doors 11-14 by the holder of the portable device 1 is detected by mechanically detecting that the door handles 6a-6d are pulled forward, for example, regardless of the touch sensors 6a1-6d1. A mechanism or the like may be used. Further, an unlock button may be installed on the door handles 6a to 6d, and an operation on the vehicle doors 11 to 14 may be detected by operating the unlock button. Alternatively, only one of the touch sensors 6a1 to 6d1 and the door lock switches 6a2 to 6d2 may be provided on the vehicle doors 11 to 14, and may also be used as an operation unit for unlocking and an operation unit for locking.

  Further, the vehicle side unit has an alarm 15. For example, the alarm device 15 may be misplaced in the vehicle interior of the portable device 1 when the vehicle doors 11 to 14 are locked, or any one of the doors 11 to 14 is open (including a half-door), or It warns that the portable device 1 is not found anywhere. That is, in the vehicle-side unit, when the vehicle doors 11 to 14 are locked, request signals are transmitted from the vehicle interior transmitters 2a to 2d and the vehicle interior transmitter 2e. At this time, if a response signal is received from the portable device 1 in response to the request signal from the vehicle interior transmitter 2e, the portable device 1 may be left in the vehicle interior. A warning is issued by 15. When the response signal from the portable device 1 is not received in response to the transmission of the request signal from the vehicle interior transmitters 2a to 2d and the vehicle interior transmitter 2e, the portable device 1 is in any of the communication areas outside the vehicle interior. Therefore, the alarm device 15 warns that the portable device 1 is not found in the communication area. Note that the alarm by the alarm device 15 is performed by voice, buzzer, light emission or the like.

  Here, an example of mutual communication performed between the vehicle-side unit and the portable device 1 will be described based on the time charts of FIGS.

  First, as shown in FIG. 3A, the vehicle-side unit transmits a wake-up signal as a first request signal from the vehicle interior transmitters 2a to 2d and the vehicle interior transmitter 2e. In the portable device 1, the portable device ECU 1 c is normally in a sleep state in order to suppress battery consumption. When the mobile device ECU 1c is in the sleep state, when the wake-up signal is received, the mobile device ECU 1c wakes up and returns a response signal as a first response signal.

  Upon receiving this response signal, the vehicle-side unit then transmits a vehicle code as a second request signal. When the portable device 1 receives a vehicle code that matches the stored vehicle code, it returns a response signal as a second response signal. The response signal as the second response signal is returned only when the vehicle codes match. When the response signal is not returned from the portable device 1, the vehicle-side unit stops transmitting the request signal at that time.

  When receiving the response signal as the second response signal, the vehicle-side unit then transmits the key number code in a predetermined order as the third request signal. The portable device 1 returns a response signal as a third response signal at the timing of receiving a key number code that matches the stored key number code. In the example shown in FIGS. 3A and 3B, the portable device 1 stores “key number code 2”, and a response signal is received at the timing when “key number code 2” is received from the vehicle-side unit. An example of sending back is shown.

  When the vehicle-side unit receives the response signal as the third response signal, the vehicle-side unit then transmits a request signal requesting the return of the ID code as the fourth request signal. In response to the request signal, the portable device 1 returns an ID code.

  Through the mutual communication between the vehicle-side unit and the portable device 1, the vehicle-side unit can acquire the key number code and ID code of the portable device 1 that is the communication partner.

  Next, flowcharts of FIG. 4 and FIG. 5 regarding the control at the time of the portable device confinement when the portable device 1 is confined in the passenger compartment when the doors 11 to 14 are locked, according to the characteristic part of the present embodiment. Will be described.

  In addition, when a user locks each door 11-14 of a vehicle using a smart entry system, when the door lock switch 6a2-6d2 of a door handle is operated, a request signal is transmitted from the vehicle interior transmitter 2e. The vehicle interior verification is performed. In this vehicle interior verification, when a response signal is returned from the portable device 1 and ID code verification is established, the user may have left the portable device 1 in the vehicle interior. Therefore, the vehicle side unit issues a misplacement alarm of the portable device 1 by the alarm device 15 without locking the vehicle doors 11 to 14. For this reason, when a user locks each door 11-14 of a vehicle using a smart entry system, the portable machine 1 is not confined in a vehicle interior in principle.

  However, when a user locks each door 11-14 using the mechanical key attached to the portable device 1, or operates each lock switch provided on the portable device 1 to lock each door 11-14. Even if the portable device 1 is left in the vehicle interior, the doors 11 to 14 of the vehicle can be locked. For this reason, the situation where the portable device 1 is confined in the vehicle interior may occur. In the flowchart of FIG. 4, the processing in the case where the doors 11 to 14 of the vehicle are locked using the wireless lock function of the portable device 1 is shown, but all the doors 11 to 14 are mechanically locked by a mechanical key. In this case, the only difference is that the processing after the “all door lock” processing of FIG. 4 is executed.

  First, in step S100, it is determined whether or not there is a lock request by the wireless lock function. That is, it is determined whether or not a lock instruction signal is transmitted from the portable device 1 and received by the vehicle-side unit when the user operates the lock switch of the portable device 1. If it is determined in step S100 that there is a lock request, the process proceeds to step S110.

  In step S110, it is determined whether or not all the doors 11 to 14 are closed. In this determination process, if it is determined that all the doors 11 to 14 are not closed, since all the doors 11 to 14 can be locked, a warning is given to the user using the alarm device 15 in step S120. To do. On the other hand, if it is determined that all the doors 11 to 14 are closed, the process proceeds to step S130, and all the doors 11 to 14 are locked.

  In subsequent step S140, a request signal is transmitted from the vehicle interior transmitter 2e to perform vehicle interior verification. In this vehicle interior verification, mutual communication between the vehicle-side unit and the portable device 1 described above is performed, and an ID code is acquired from the portable device 1. However, the mutual communication executed in the vehicle interior verification in step S140 is not limited to the mutual communication described above.

  For example, since the key number code and the ID code of each portable device 1 are stored in the verification ECU 4 of the vehicle side unit in association with each other, the third response is received from the portable device 1 when the key number code is determined. Mutual communication may be terminated when a response signal as a signal is received, and the ID code of the portable device 1 may be specified from the determined key number code.

  Further, the portable device 1 can be identified not by the ID code but by the key number code. For this reason, the key number code of the portable device 1 is determined through mutual communication between the vehicle-side unit and the portable device 1, whereby the key number code of the portable device 1 is acquired by the determination, and the mobile phone that is confined in the vehicle interior. It may be used for identification of the machine 1.

  Furthermore, in the above-described mutual communication, after the portable device 1 is woken up, the portable device 1 is caused to return separate response signals for the vehicle code and the key number code. However, the vehicle-side unit continuously transmits the vehicle code and the key number code, and the portable device 1 returns one response signal at the timing when the vehicle code matches and the matching key number code is received. You may do it.

  In step S150, in the vehicle interior verification in step S140, whether or not the portable device 1 remains in the vehicle interior is determined based on whether or not mutual communication with the portable device 1 is performed and an ID code is acquired. judge. If it is determined that the portable device 1 remains in the vehicle interior, the process proceeds to step S160. If it is determined that the portable device 1 does not remain in the vehicle interior, the processing illustrated in FIG.

  In step S160, the ID code of the portable device 1 left in the vehicle compartment and confined in the vehicle compartment is stored. As described above, the key number code of the portable device 1 may be stored.

  In a succeeding step S170, it is determined whether or not the vehicle interior verification for all the portable devices 1 has been completed. As described above, in the mutual communication between the vehicle-side unit and the portable device 1, the key number code is transmitted from the vehicle-side unit in a predetermined order, and the portable device 1 has a key that matches the stored key number code. A response signal is sent back when the number code is received. For this reason, even if the response signal for the key number code is received from the portable device 1, if the key number code to be transmitted still remains after that, the remaining key number code is not transmitted. When a plurality of portable devices 1 are left in the passenger compartment, the ID codes of all the portable devices 1 cannot be acquired. Therefore, in step S170, all portable devices 1 are targeted depending on whether or not the key number code of the portable device 1 that sent back the response signal is the last code of the key number code transmitted in a predetermined order. It is determined whether the vehicle interior verification is completed. In this determination process, if it is determined that the vehicle interior verification for all the portable devices 1 has not been completed yet, the process returns to the process of step S140, and all the remaining key number codes are transmitted. Car interior verification is performed for the portable device 1 of the vehicle.

  When the portable device 1 is confined in the vehicle interior when the vehicle doors 11 to 14 are locked by performing the processing shown in the flowchart of FIG. 4 described above, the confined portable device 1 is identified. Information (ID code or the like) can be acquired and stored.

  Here, when the portable device 1 is confined in the vehicle interior and the periodic request signals are transmitted from the vehicle interior transmitters 2a to 2d, the portable device 1 reacts to radio waves leaking into the vehicle interior. It may end up. In this case, a third party who does not hold the portable device 1 can unlock the vehicle doors 11 to 14, or the portable device 1 returns a response signal in response to a periodic request signal transmission. Repeating the above causes a problem that the battery of the portable device 1 is consumed. Therefore, in the conventional smart entry system, when the doors 11 to 14 of the vehicle are locked while the portable device 1 remains in the vehicle interior, transmission of request signals from the vehicle interior transmitters 2a to 2d is stopped. It was.

  However, if the transmission of request signals from the vehicle interior transmitters 2a to 2d is completely stopped, the user holding the portable device 1 cannot unlock the vehicle door using the smart entry system. End up.

  In the present embodiment, even when the portable device 1 is confined in the vehicle interior, the user holding the portable device 1 can unlock the vehicle doors 11 to 14 using the smart entry system as much as possible. The processing shown in the flowchart of FIG. 5 is executed. The process shown in the flowchart of FIG. 5 is executed when the doors 11 to 14 of the vehicle are locked and the vehicle is parked.

  First, in step S200, vehicle interior verification is performed by transmitting request signals from the vehicle interior transmitters 2a to 2d. In the subsequent step S210, whether or not the portable device 1 is within the communication area of the in-vehicle transmitters 2a to 2d is determined based on whether or not mutual communication with the portable device 1 has been performed in the outside vehicle comparison in step S200. Determine. When it is determined that the portable device 1 is not in the communication area of the outside-vehicle transmitters 2a to 2d, the process proceeds to step S220 and waits for a predetermined time. Thereafter, the process proceeds to the process of step S200 again, and if the portable device 1 is not found by performing outside-vehicle collation, transmission of periodic request signals from the outside-vehicle transmitters 2a to 2d is continued.

  On the other hand, if it is determined in step S210 that the portable device 1 is within the communication area of the vehicle interior transmitters 2a to 2d, the process proceeds to step S230. In step S230, the ID code (or key number code) acquired by the vehicle exterior comparison is compared with the ID code (or key number code) stored in step S160 of the flowchart of FIG. As a result of the comparison, if it is determined in step S240 that the ID code acquired by the vehicle compartment verification matches the stored ID code, the process proceeds to step S250, and the vehicle exterior verification is stopped. On the other hand, if it is determined in step S240 that the ID code acquired by the vehicle compartment verification and the stored ID code do not match, the process proceeds to step S220, and the regular vehicle compartment verification is continued.

  That is, in this embodiment, since the ID code (or key number code) of the portable device 1 confined in the vehicle interior is stored, the portable device 1 is carried during transmission of periodic request signals from the vehicle interior transmitters 2a to 2d. When the response signal from the machine 1 is received, it can be determined whether or not the portable machine 1 that has returned the response signal is the portable machine 1 confined in the vehicle interior. When the portable device 1 other than the portable device 1 confined in the vehicle interior returns a response signal or when no response signal is received, that is, the portable device 1 confined in the vehicle interior transmits the out-of-vehicle transmitter 2a. When a request signal from ˜2d is not responded, a third party who does not hold the portable device 1 does not hold the portable device 1 even if the periodic request signal is continuously transmitted from the outdoor transmitters 2a to 2d. ~ 14 cannot be unlocked. Further, the battery of the portable device 1 confined in the passenger compartment is not consumed. Therefore, in this embodiment, when the response signal is not received from the portable device 1 confined in the vehicle interior, the transmission of the periodic request signals from the vehicle interior transmitters 2a to 2d is continued. As a result, a user holding another portable device 1 can unlock the vehicle door using the smart entry system.

  Here, the unlock control of the doors 11 to 14 by the smart entry system will be briefly described.

  When each of the doors 11 to 14 is parked in a locked state, as described above, outside vehicle compartment matching is performed periodically.

  At this time, a request signal including a unique identification code is transmitted from each of the outdoor transmitters 2a to 2d to each of the outdoor transmitters 2a to 2d, and the portable device 1 returns the identification code and the ID code as a response signal. . Thereby, the holder of the portable device 1 can identify which vehicle doors 11 to 14 are approaching. In addition, in order to identify the positions of the vehicle doors 11 to 14 with which the holder of the portable device 1 is approaching, the verification ECU 4 sequentially requests the transmitters 2a to 2d at timings shifted from each other. May be instructed to transmit.

  When the portable device 1 returns a response signal to any of the request signals from the vehicle interior transmitters 2a to 2d, the ID code is verified. When the verification ECU 4 determines that ID code verification is established, the verification ECU 4 determines the position of the holder of the portable device 1 from the identification code. Then, the body ECU 7 is instructed to put the vehicle doors 11 to 14 into the unlock standby state by activating the touch sensors 6a1 to 6d1 of the vehicle doors 11 to 14 corresponding to the positions. Based on this instruction signal, the body ECU 7 sets one of the vehicle doors 11 to 14 to the unlock standby state.

  When the holder of the portable device 1 touches the door handles 6a to 6d of the vehicle doors 11 to 14 set to the unlock standby state, the touch handle operation of the holder of the portable device 1 is detected by the touch sensors 6a1 to 6d1. Then, the detection signal is transmitted to the verification ECU 4. Then, the verification ECU 4 gives an instruction to the body ECU 7 to unlock all the vehicle doors 11 to 14. Based on this instruction signal, the body ECU 7 outputs an unlock drive signal to the lock control units 5 a to 5 d of the vehicle doors 11 to 14 to unlock the vehicle doors 11 to 14.

It is a block diagram which shows the structure of the whole smart entry system in embodiment. It is explanatory drawing for demonstrating the communication area of a vehicle interior transmitter and a vehicle interior transmitter. (A), (b) is a time chart which shows an example of the mutual communication performed between a vehicle side unit and a portable device. The flowchart which shows the process for acquiring and memorize | storing the ID code | cord | chord of the confined portable machine for the control at the time of portable machine confinement when a portable machine is confined in a vehicle interior when each door is locked It is. It is a flowchart which shows the process for controlling continuation and a stop of the vehicle exterior collation in control at the time of portable machine confinement when a portable machine is confined in a vehicle interior when each door is locked.

Explanation of symbols

1 mobile device 1a receiver 1b transmitter 1c mobile device ECU
2a to 2d In-vehicle transmitter 2e In-vehicle transmitter 3 Receiver 4 Verification ECU
6a2-6d2 Door lock switch 7 Body ECU
8 Power supply ECU
9 Engine control device 10 Vehicle 15 Alarm

Claims (4)

In response to a request signal transmitted from the vehicle-side unit, the vehicle-side unit receives a response signal from the portable device by performing mutual communication in which the portable device returns a response signal including an ID code. A smart entry that controls locking / unlocking of a vehicle door on condition that the ID code included in the response signal is checked against a registered code that has been registered in advance, and that the matching result is obtained. In the system,
A plurality of the portable devices are prepared, and a portable device identification code that can identify each portable device is assigned to each of the plurality of portable devices, and the vehicle side unit communicates with the portable device. Through which the portable device identification code of the portable device is obtained,
The vehicle side unit is:
A receiver that receives a response signal from the portable device, and a communication area with the portable device that is outside the vehicle compartment of the vehicle, and an outdoor transmitter that transmits a request signal toward the outside of the vehicle,
A vehicle interior transmitter that transmits a request signal toward the vehicle interior, with the vehicle interior of the vehicle as a communication area with the portable device,
When all doors of the vehicle are locked, the vehicle interior transmitter transmits a request signal, and when the receiver receives a response signal in response to the request signal, it is obtained through the mutual communication. An identification code storage means for storing the portable device identification code that has been stored as a portable device identification code of a portable device confined in the vehicle interior;
When the vehicle is parked with all doors of the vehicle locked, a request signal is periodically transmitted from the vehicle exterior transmitter, and a response signal in response to the request signal is received. An unlock permission means for permitting unlocking of a door approaching by a user holding the portable device based on the verification of the ID code included in the response signal;
An unlocking means for unlocking the door in response to the unlocking permission by the unlocking permission means,
When the unlock permission means transmits a request signal from the transmitter outside the passenger compartment and a portable device identification code is acquired through mutual communication with the portable device, the portable device identification code is stored in the identification code storage. A smart entry system that continues to periodically transmit a request signal using the vehicle exterior transmitter on condition that the mobile device identification code stored in the means does not match.   2. The ID code is assigned to each of the plurality of portable devices, and the identification code storage unit stores the ID code as the portable device identification code. Smart entry system.   Each of the plurality of portable devices is provided with a key number code indicating a key number of each portable device, and the identification code storage means stores the key number code as the portable device identification code. The smart entry system according to claim 1.   The said portable machine identification code memory | storage means performs the mutual communication for acquisition of the said portable machine identification code targeting all the portable machines, The Claim 1 thru | or 3 characterized by the above-mentioned. Smart entry system.

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