JP7060058B2 - In-vehicle device control method and key system using key system - Google Patents

Description

The present invention relates to a method for controlling an in-vehicle device using a key system and a key system.

As an electronic key system for a vehicle, a system using a mobile phone as an electronic key is known (see, for example, Patent Documents 1 and 2). In the vehicle electronic key system described in Patent Document 1, a collation ECU that collates an ID acquired from a mobile phone is connected to a main body ECU and an engine ECU via a network, and when the ID collation is established, the mobile phone Direct signals can be transmitted from the main body ECU to the engine ECU, and the door lock can be locked / unlocked and the engine can be started.

Japanese Unexamined Patent Publication No. 2011-231567 Japanese Unexamined Patent Publication No. 2005-290900

In the vehicle electronic key system described in Patent Document 1 and the like, if the accuracy of ID verification by the verification ECU cannot be ensured, the security of the main body ECU and engine ECU cannot be ensured, and not only the door lock is unlocked but also the door lock is unlocked. There was a problem that even the start of the engine could be executed illegally.

An object to be solved by the present invention is to improve the security of a key system that uses an electronic key and a mobile terminal having a key function to perform operation of an in-vehicle device including at least unlocking and locking a door. It is to provide a control method and a key system of an in-vehicle device using a key system.

The present invention determines whether or not to operate an in-vehicle device including at least unlocking and locking a door according to the result of an electronic key authentication process for authenticating an ID code wirelessly transmitted from an electronic key, and also performs a key function. In the method of controlling an in-vehicle device using a key system for determining whether or not the in-vehicle device can be operated according to the result of the mobile terminal authentication process that authenticates the ID code wirelessly transmitted from the possessed mobile terminal, the above-mentioned mobile terminal authentication is performed. In the process, the ID code wirelessly transmitted from the mobile terminal is authenticated by the in-vehicle mobile terminal authentication device, and when the authentication process is established, the electronic key is performed from the mobile terminal authentication device. An ID code is transmitted to the authentication device for mobile terminals, and a second authentication process is performed in which the authentication device for electronic keys authenticates the ID code transmitted from the authentication device for mobile terminals . Then, only when the door is unlocked and locked by the establishment of the first authentication process and the door is unlocked, the mobile terminal authentication device permits the start of the traveling drive source, and the first When the door is unlocked and locked by the establishment of the authentication process of the above, and the door is locked, the above problem is solved by not permitting the start of the traveling drive source by the authentication device for the mobile terminal. ..

According to the present invention, the authentication process of the mobile terminal is performed via the authentication process of the electronic key, so that the door can be unlocked and locked at least by using the electronic key and the mobile terminal having the key function. It is possible to improve the security of the key system that executes the operation of the in-vehicle device including the vehicle.

It is a figure which shows the outline of the vehicle which applied the key system which concerns on one Embodiment of this invention. It is a flowchart which shows the process when the door lock is unlocked and the engine is started by using a portable terminal in the key system of this embodiment. It is a flowchart which shows the process when the door lock is locked by using the mobile terminal after the engine is stopped in the key system of this embodiment. It is a figure which shows the outline of the vehicle which applied the key system which concerns on other embodiment. It is a flowchart which shows the process when the door lock is unlocked and the engine is started by using a mobile terminal in the key system of another embodiment. It is a figure which shows the outline of the vehicle which applied the key system which concerns on other embodiment. It is a flowchart which shows the process when the door lock is unlocked, the mobile terminal is charged, and the engine is started by using a non-contact IC card in the key system of another embodiment. It is a figure which shows the outline of the vehicle which applied the key system which concerns on other embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of a vehicle 1 to which the key system 100 according to the embodiment of the present invention is applied. As shown in this figure, the vehicle 1 of the present embodiment includes a body control device (BCM: Body Control Module) 2, an engine control device (ECM: Engine Control Module) 3, a steering control device 4, and a brake control device. It is equipped with various control devices such as 5, a transmission control module (TCM) 6, and a skid prevention device (VDC: Vehicle Dynamics Control) 7. These control devices are connected so as to be communicable via an in-vehicle LAN 8 such as CAN (Controller Area Network).

The body control device 2 controls various functions such as a keyless function, an engine start function, a timer function, and a safety function. Examples of the keyless function include a passive keyless function, a remote control keyless function, and a door lock / unlock function. The passive keyless function is a function that detects that the user holding the electronic key 110 touches the door lever and operates the door lock motor 21 to unlock / lock the door. The remote control keyless function is a function that detects that the user has operated the open / close switch of the electronic key 110 and operates the door lock motor 21 to unlock / lock the door. Further, the door lock / unlock function is a function of unlocking / locking the door without requiring a user operation. Door lock / unlock functions include a function that activates the door lock motor 21 to lock the door when the vehicle accelerates to a predetermined speed or higher, and a function that activates the door lock motor 21 to open the door when the shift enters the P range. The function of locking and the like can be exemplified.

As the engine starting function, a push engine starting function can be exemplified. The push engine start function detects that the electronic key 110 is present in the vehicle interior based on the strength of the radio wave output from the electronic key 110, and also detects that the brake switch is turned on. It is a function to start the engine when it detects that the engine start button 22 has been operated.

Examples of the timer function include a function of managing the lighting time of the room lamp, a function of managing the operation timing of the battery saver, and the like. Further, as a safety function, a function of managing tire pressure and the like can be exemplified.

The vehicle 1 of the present embodiment is keyless corresponding to the use of a portable communication terminal (hereinafter referred to as a mobile terminal) 200 such as a smartphone or a mobile phone in addition to the keyless function corresponding to the use of the electronic key 110 and the engine starting function. It has a function and an engine starting function. It is the key system 100 of the present embodiment that realizes these keyless functions and the engine starting function. The key system 100 will be described later.

The engine control device 3 is a controller that executes operation control of the engine 31. The engine control device 3 controls the engine 31 so as to realize the required driving force according to the operation amount of the accelerator and the required driving force output from the sideslip prevention device 7 and the like. The vehicle 1 may be a vehicle having only an engine (internal combustion engine) as a traveling drive source, or a hybrid vehicle having a combination of an engine and an electric motor as a traveling drive source. Further, the vehicle 1 may be an electric vehicle (including a fuel cell vehicle) having only an electric motor as a traveling drive source. In such a case, the vehicle 1 is provided with a motor control device instead of the engine control device 3. Further, the vehicle 1 may be an autonomous driving vehicle that travels by automatic driving. In such a case, the engine control device 3 and the motor control device are controlled so that the required driving force output from the automatic operation control device is realized.

The steering control device 4 is a controller that executes control of the electric power steering motor 41. The steering control device 4 controls the electric power steering motor 41 so as to realize the target steering angle output from the automatic operation control device 10 and the like. The electric power steering motor 41 is a steering actuator attached to a steering column shaft (not shown).

The brake control device 5 is a controller that executes control of the brake unit 51. The brake control device 5 controls the brake unit 51 so as to realize the required braking force output from the automatic driving control device 10, the sideslip prevention device 7, and the like.

The transmission control device 6 is a controller that controls the automatic transmission (AT) 61. The transmission control device 6 calculates the optimum gear from the vehicle speed, accelerator opening, shift position, etc. so as to realize the required driving force output from the automatic driving control device 10, the sideslip prevention device 7, and the like, and the AT61. Execute shift control.

The electronic stability control device 7 monitors the driving operation of the driver and the movement of the vehicle by using various sensors for the purpose of preventing the vehicle from skidding, and outputs the required driving force to the engine control device 2 according to the running state of the vehicle. Then, the required braking force is output to the brake control device 5.

The key system 100 includes an electronic key 110, an electronic key authentication ECU 120, an in-vehicle electronic key 130, and a mobile terminal 200. The electronic key 110 includes an unlock button 111A, a lock button 111B, a communication device 112, and a control device 113. The key system 100 of the present embodiment supports a passive keyless function and a remote control keyless function as keyless functions, and when the unlock button 111A and the lock button 111B are operated by the user, the remote control keyless function is executed. The remote control. The control device 113 includes a memory that stores an ID code.

The electronic key authentication ECU 120 is provided in the vehicle 1 and includes a communication device 121 and a control device 122. The communication device 121 constantly transmits the ID code request signal inside and outside the vehicle. As the frequency band of the radio wave transmitted by the communication device 121, an LF (Low Frequency) band can be exemplified. When the communication device 112 of the electronic key 110 receives the ID code request signal, the control device 113 of the electronic key 110 transmits the ID code signal from the communication device 112 to the communication device 121 of the electronic key collation ECU 120. When the unlock button 111A or the lock button 111B is turned on, the control device 113 of the electronic key 110 sends the ID code signal from the communication device 112 together with the door lock unlock / lock command of the electronic key authentication ECU 120. It is transmitted to the communication device 121. As the frequency band of the radio wave transmitted by the communication device 112 of the electronic key 110, a UHF (Ultra High Frequency) band can be exemplified.

The control device 122 of the electronic key authentication ECU 120 is connected to the body control device 2 via the vehicle-mounted LAN 8. The control device 122 includes a memory that stores an ID code, executes an authentication process of the ID code received by the communication device 121, and when the ID code authentication is established, a signal for permitting the keyless function is transmitted to the vehicle-mounted LAN 8. Is transmitted to the body control device 2 via. As a result, the body control device 2 unlocks / locks the door lock when the user holds or touches the door lever, or operates the unlock button 111A or the lock button 111B. Further, the control device 122 outputs a signal for permitting the engine starting function when the strength of the radio wave on which the ID code signal is carried is within a predetermined range corresponding to the radio wave strength when the electronic key 110 is present in the vehicle. , Is transmitted to the body control device 2 via the vehicle-mounted LAN 8. As a result, the body control device 2 starts the engine when the engine start button 22 is operated with the brake switch turned on.

The mobile terminal 200 of the present embodiment is a smartphone in which application software for executing the processing of the key system 100 is installed, and includes an input device 201, a communication device 202, and a control device 203. Examples of the input device 201 include a touch panel capable of inputting commands by the user's operation, a microphone capable of inputting by the user's voice, and the like. The commands input by the input device 201 include unlocking / locking the door lock of the vehicle 1 and starting the engine. The command input by the input device 201 may include starting the air conditioner, opening / closing the door window, and the like. The control device 203 includes a memory that stores an ID code.

When a command such as unlocking / locking the door lock is input to the input device 201, the control device 203 receives a signal corresponding to the command input from the communication device 202 to the communication device 131 of the vehicle-mounted electronic key 130 described later. The ID code signal is transmitted. As a communication standard between the communication device 202 of the mobile terminal 200 and the communication device 131 of the in-vehicle electronic key 130, short-range wireless communication standards such as Bluetooth (registered trademark) and infrared communication can be exemplified.

The in-vehicle electronic key 130 is installed at a predetermined position in the vehicle 1, and includes a communication device 131, a communication device 132, and a control device 133. The communication device 131 receives a command signal such as unlocking / locking the door lock and an ID code signal transmitted from the communication device 202 of the mobile terminal 200 within a communicable range. The communication device 132 has the same configuration as the communication device 112 of the electronic key 110, receives an ID code request signal from the communication device 121 of the electronic key authentication ECU 120, and commands a command signal such as unlocking / locking the door lock and an ID code. The signal is transmitted to the communication device 121. The frequency band of the radio wave transmitted by the communication device 132 of the vehicle-mounted electronic key 130 is the same as that of the communication device 112 of the electronic key 110 described above, and the UHF (Ultra High Frequency) band can be exemplified.

Here, the vehicle-mounted electronic key 130 is a unit having a configuration in which the control device (113) of the electronic key 110 is replaced with the control device 133 and the communication device 131 is added to the electronic key 110 in comparison with the electronic key 110. As described above, the vehicle-mounted electronic key 130 includes a communication device 132 common to the communication device 112 of the electronic key 110, and is wirelessly transmitted between the communication device 132 and the communication device 121 of the electronic key verification ECU 120. The ID code request signal and the ID code signal are common to the ID code request signal and the ID code signal that are wirelessly transmitted between the communication device 112 of the electronic key 110 and the communication device 121 of the electronic key verification ECU 120. .. That is, the electronic key collation ECU 120 performs authentication processing of a common ID code for the electronic key 110 and the mobile terminal 200.

The control device 133 includes a door lock control circuit 1331, an engine start control circuit 1332, and a power switch 1333. The door lock control circuit 1331 includes a memory that stores an ID code, performs authentication processing of the ID code received by the communication device 131 from the communication device 202 of the mobile terminal 200, and when the ID code authentication is established, the door lock is performed. The lock / unlock command signal and the ID code signal are transmitted from the communication device 132 to the communication device 121 of the electronic key verification ECU 120. Here, the strength of the radio wave output from the communication device 132 by the door lock control circuit 1331 is set so as not to be included in a predetermined range corresponding to the radio wave strength when the above-mentioned electronic key 110 is present in the vehicle. ..

The control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the body control of the door lock unlocking / locking command signal via the in-vehicle LAN 8. It is transmitted to the device 2. Here, the strength of the radio wave output from the communication device 132 of the vehicle-mounted electronic key 130 is not included in the predetermined range corresponding to the radio wave strength when the above-mentioned electronic key 110 is present in the vehicle, so that the electronic key authentication is performed. The control device 122 of the ECU 120 does not transmit a signal permitting the start of the engine to the body control device 2. As a result, the body control device 2 unlocks / locks the door lock, but prohibits the engine from starting. Here, the door lock control circuit 1331 is constantly supplied with electric power from the power supply 1334 and executes the ID code authentication process.

The power switch 1333 turns on / off the power supply from the power supply 1334 to the engine start control circuit 1332. The power switch 1333 is controlled by the door lock control circuit 1331. The door lock control circuit 1331 turns on the power switch 1333 when the authentication of the ID code signal received by the communication device 131 is established and the door lock is unlocked. On the other hand, the door lock control circuit 1331 turns off the power switch 1333 when the authentication of the ID code signal received by the communication device 131 is not established or when the door lock is locked.

When the power switch 1333 is turned on, the engine start control circuit 1332 transmits an ID code signal from the communication device 132 to the communication device 121 of the electronic key authentication ECU 120. Here, the strength of the radio wave on which the ID code signal is carried is set so as to be included in a predetermined range corresponding to the radio wave strength when the above-mentioned electronic key 110 is present in the vehicle. Therefore, the control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the signal permitting the engine to start is transmitted to the body control device via the in-vehicle LAN 8. Send to 2. As a result, the body control device 2 starts the engine when the engine start button 22 is operated with the brake switch turned on.

The door lock control circuit 1331 prohibits the door lock from being locked when the door lock lock command signal and the ID code signal are transmitted from the communication device 202 of the mobile terminal 200 to the communication device 131 while the engine 31 is on. do. On the other hand, in the door lock control circuit 1331, the signal and ID of the door lock lock command from the communication device 202 of the mobile terminal 200 to the communication device 131 during the period from when the engine 31 is turned on to off until a predetermined time elapses. When the code signal is transmitted, the received ID code signal is authenticated, and when the authentication is successful, the power switch 1333 is turned off. The door lock control circuit 1331 receives a door lock lock command signal and an ID code from the communication device 132 to the communication device 121 of the electronic key collation ECU 120 when the engine 31 is off and the power switch 1333 is off. Send a signal. The control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the signal of the door lock lock command is transmitted to the body control device 2 via the vehicle-mounted LAN 8. Send. As a result, the body control device 2 locks the door lock when the engine 31 is off, the power switch 1333 is off, and the ID code authentication by the electronic key authentication ECU 120 is established.

The door lock control circuit 1331 transmits a warning command signal from the communication device 131 to the communication device 202 of the mobile terminal 200 when the predetermined time has elapsed since the engine 31 was turned from on to off. When the communication device 202 receives the warning command signal, the control device 203 of the mobile terminal 200 generates a warning sound or displays a warning display.

FIG. 2 is a flowchart showing a process when the mobile terminal 200 is used to unlock the door lock and start the engine 31 in the key system 100 of the present embodiment. First, in step 1, the door lock control circuit 1331 determines whether or not the communication device 131 of the vehicle-mounted electronic key 130 has received the door lock unlock command signal and the ID code signal from the communication device 202 of the mobile terminal 200. judge. In the case of an affirmative judgment, the process proceeds to step 2.

In step 2, the door lock control circuit 1331 executes the authentication process of the ID code received by the communication device 131 of the vehicle-mounted electronic key 130, proceeds to step 3 when the authentication is established, and proceeds to step 3 when the authentication is not established. Return to step 1. In step 3, the door lock control circuit 1331 transmits a door lock unlock command signal and an ID signal from the communication device 132 to the communication device 121 of the electronic key authentication ECU 120. The control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code received by the communication device 121, and transmits the signal of the door lock unlock command to the body control device 2 via the vehicle-mounted LAN 8. The body control device 2 operates the door lock motor 21 to unlock the door lock.

Next, in step 4, the door lock control circuit 1331 turns on the power switch 1333. Next, in step 5, the engine start control circuit 1332 transmits an ID code signal from the communication device 132 to the communication device 121 of the electronic key authentication ECU 120. In this step, the strength of the radio wave transmitted from the communication device 132 (hereinafter referred to as a predetermined radio wave strength) is the strength of the radio wave transmitted from the electronic key 110 when the electronic key 110 is present in the vehicle, as described above. Equivalent to. Therefore, in this step, the electronic key 110 is in the same state as existing in the vehicle.

Next, in step 6, the control device 122 of the electronic key authentication device 120 executes the authentication process of the ID code received by the communication device 121, and when the ID code authentication is established, the process proceeds to step 7. In step 7, the control device 122 of the electronic key authentication ECU 120 transmits a signal permitting the start of the engine to the body control device 2 via the vehicle-mounted LAN 8. As a result, the body control device 2 starts the engine 31 when the brake switch is on and the engine start button 22 is on. This completes the process.

FIG. 3 is a flowchart showing a process when the door lock is locked by using the mobile terminal 200 after the engine 31 is stopped in the key system 100 of the present embodiment. First, in step 11, the door lock control circuit 1331 determines whether or not the engine 31 is off. In the case of an affirmative determination, the process proceeds to step 12. When the engine 31 is turned from on to off, the door lock is unlocked by the body control device 2. Next, in step 12, the door lock control circuit 1331 determines whether or not a predetermined time has elapsed since the engine 31 was turned from on to off. In the case of an affirmative determination, the process proceeds to step 20, and in the case of a negative determination, the process proceeds to step 13.

In step 20, the door lock control circuit 1331 transmits a warning command signal such as voice or display from the communication device 131 to the communication device 202 of the mobile terminal 200. As a result, when a predetermined time has elapsed from when the engine 31 is stopped until the door lock is locked, a warning is given to a user such as the owner of the vehicle 1 via the mobile terminal 200. Return to step 11 from step 21.

On the other hand, in step 13, the door lock control circuit 1331 determines whether or not the door lock lock command signal and the ID code signal are transmitted from the communication device 202 of the mobile terminal 200 to the communication device 131. In the case of an affirmative determination, the process proceeds to step 14, and in the case of a negative determination, the process returns to step 12. In step 14, the door lock control circuit 1331 executes the authentication process of the ID code signal received by the communication device 131, and if the authentication is established, the process proceeds to step S15, and if the authentication is not established, the process returns to step 12. In step 15, the door lock control circuit 1331 turns off the power switch 1333.

Next, in step 16, the door lock control circuit 1331 transmits a door lock lock command signal and an ID code signal from the communication device 132 to the communication device 121 of the electronic key authentication ECU 120. Next, in step 17, the control device 122 of the electronic key collation ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the signal of the door lock lock command is transmitted to the in-vehicle LAN 8. It is transmitted to the body control device 2 via. Next, in step 18, the body control device 2 locks the door lock when the engine 31 is off, the power switch 1333 is off, and the ID code collation by the electronic key collation ECU 120 is established. do. This completes the process.

As described above, in the present embodiment, in the authentication process of the mobile terminal 200 that authenticates the ID code wirelessly transmitted from the mobile terminal 200, the authentication of the ID code wirelessly transmitted from the mobile terminal 200 is performed by the mobile terminal 200. When the in-vehicle electronic key 130, which is an authentication device for the device, is used and the ID code is authenticated, the in-vehicle electronic key 130 transmits an ID code signal to the electronic key authentication ECU 120, which is an authentication device for the electronic key 110. , The ID code is authenticated by the electronic key authentication ECU 120. Then, depending on the result of the authentication process in the electronic key authentication ECU 120, it is determined whether or not the operation of the in-vehicle device including at least the unlocking and locking of the door is permitted.

That is, the authentication process of the mobile terminal 200 is performed via the authentication process of the electronic key that has been conventionally mounted on the vehicle and the security is ensured. This makes it possible to improve the security of the key system 100 that uses the electronic key 110 and the mobile terminal 200 to perform the operation of the vehicle-mounted device, including at least unlocking and locking the door. Here, when a signal for instructing the operation of the in-vehicle device is directly transmitted from the mobile terminal 200 to the body control device 2, a high-level security function is required on the body control device 2 side. According to the key system 100 of the embodiment, security equivalent to that of a key system using a conventional electronic key (without using a mobile terminal) is ensured without adding a security function to the body control device 2. Can be done.

Further, in the present embodiment, the electronic key authentication ECU 120 is shared by the authentication process of the electronic key 110 and the authentication process of the mobile terminal 200, and is wirelessly transmitted from the in-vehicle electronic key 130 to the electronic key authentication ECU 120 and from the electronic key 110. Wirelessly transmit the same signal as the signal. As a result, the key system 100 of the present embodiment has a configuration in which an in-vehicle electronic key 130 is added by using the electronic key authentication ECU 120 conventionally mounted on the vehicle in comparison with the conventional key system. Therefore, the key system 100 of the present embodiment can be configured by attaching the in-vehicle electronic key 130 to the vehicle 1 that has already been sold and is equipped with the conventional key system.

Further, in the present embodiment, the opening and locking of the door lock is permitted, and the start of the engine 31 is permitted only when the door lock is unlocked. Therefore, it is possible to prevent the engine 31 from being started even though the door lock is locked, and it is possible to improve security.

Further, in the present embodiment, the power of the engine control circuit 1332 is turned on only when the door lock is permitted to be unlocked and locked and the door lock is unlocked. As a result, even though the vehicle-mounted electronic key 130 is always present in the vehicle, the electronic key 110 is in the same state as being present in the vehicle only when the door lock is unlocked. Therefore, it is possible to allow the engine 31 to start only when the door lock is unlocked.

Further, in the present embodiment, the door lock is permitted to be locked only when the power of the engine start control circuit 1332 is turned off. This makes it possible to prevent the user from leaving the vehicle 1 by locking the door lock while the engine 31 is still operating or the vehicle-mounted electronic key 130 is on.

Further, in the present embodiment, the ECU for authentication of the mobile terminal 200 is unitized as an in-vehicle electronic key 130, so that it can be easily attached to the vehicle 1.

FIG. 4 is a diagram showing an outline of a vehicle 1 to which the key system 300 according to another embodiment is applied. The key system 300 shown in this figure makes it possible for the user who is the owner of the vehicle 1 to give the other users the authority to operate the in-vehicle device such as unlocking and locking the door. Further, the key system 300 permits only the unlocking and locking of the door, or limits the time and the number of times, to the authority given by the user who is the owner of the vehicle 1 to another user. Etc., it is possible to add restrictions.

The communication device 202 of the mobile terminal 200 carried by the user who is the owner of the vehicle 1 and the communication device 202 of the mobile terminal 200 carried by another user are communicably connected via wireless communication. As the communication standard between the mobile terminals 200, 4G and LTE can be exemplified. Further, the mobile terminals 20 may be connected to each other by a wide area communication network using a specific frequency of 900 MHz or less.

In the mobile terminal 200 carried by the user who is the owner of the vehicle 1, the input device 201 can input a command for granting the authority to operate the in-vehicle device. This directive only allows the door to be unlocked and locked, prohibits the operation of other in-vehicle devices such as starting the engine, and limits the number of door unlocking and locking operations and the operation time. It is possible to add restrictions on the number of times and time.

When a command for granting the authority to operate the in-vehicle device is input by the input device 201 in the mobile terminal 200 carried by the user who is the owner of the vehicle 1, the control device 203 is carried by another user from the communication device 202. A command signal for granting the authority to operate the in-vehicle device is transmitted to the communication device 202 of the mobile terminal 200. In the mobile terminal 200 carried by another user, when the communication device 202 receives the command signal, the input device 201 can input a command for operating the in-vehicle device including unlocking and locking the door. Here, when the authority for operating the in-vehicle device is restricted with respect to the type, number of times, and time of the in-vehicle device for which the operation is permitted, the command that can be input by the input device 201 is the range of the restricted authority. Limited to within.

FIG. 5 is a flowchart showing a process in which the door lock is unlocked and the engine 31 is started by using the mobile terminal 200 in the key system 300 of the present embodiment. First, the processes of steps 1 to 4 are executed in the same manner as in the above-described embodiment. Next, in step 31, the engine start control circuit 1332 determines whether or not the command received by the communication device 131 for granting the authority to operate the in-vehicle device includes the authority for starting the engine. In the case of an affirmative determination, the process proceeds to step 5, and in the case of a negative determination, the process ends without transmitting the ID code signal from the communication device 132 of the vehicle-mounted electronic key 130 to the communication device 121 of the electronic key authentication ECU 120. .. That is, if the command for granting the authority to operate the in-vehicle device does not include the authority for starting the engine, the process is terminated without being permitted to start the engine. On the other hand, if the command for granting the authority to operate the in-vehicle device includes the authority for starting the engine, steps 5 to 7 are executed and the engine is allowed to start. This completes the process.

As described above, in the key system 300 according to the present embodiment, the in-vehicle device possessed by the user who is the owner of the vehicle 1 is transferred from the mobile terminal 200 of the user who is the owner of the vehicle 1 to the mobile terminal 200 of another user. It is possible to send the authority granting information including the ID code for granting the authority to operate the above to another user. Then, in the key system 300 according to the present embodiment, when the authority grant information is transmitted from the mobile terminal 200 of the user who is the owner of the vehicle 1 to the mobile terminal 200 of another user, the authentication process of the mobile terminal 200 is performed. Will be executed. As a result, the user who is the owner of the vehicle 1 equipped with the key system 300 of the present embodiment can lend the vehicle 1 to another user, and the key system 300 of the present embodiment can be used for car sharing. It will be possible to apply to vehicles used in rental cars and the like.

Further, the key system 300 according to the present embodiment includes authority restriction information for limiting the operation authority of the in-vehicle device from the mobile terminal 200 of the user who is the owner of the vehicle 1 to the mobile terminal 200 of another user. Authorization information can be sent. Then, in the key system 300 according to the present embodiment, when the authority granting information including the authority restriction information is transmitted from the mobile terminal 200 of the user who is the owner of the vehicle 1 to the mobile terminal 200 of another user, the authority is restricted. Depending on the information, it is determined whether or not the in-vehicle device can be operated. As a result, the user who is the owner of the vehicle 1 equipped with the key system 300 of the present embodiment allows other users to, for example, only unlock and lock the door lock of the vehicle 1, or the vehicle 1 It is possible to allow the engine to be started only a predetermined number of times.

FIG. 6 is a diagram showing an outline of a vehicle 1 to which the key system 400 according to another embodiment is applied. The key system 400 shown in this figure includes an NFC (Near Field Communications) system 410 that reads an ID code signal stored in a non-contact IC card (not shown), and a mobile terminal charging terminal 420. The NFC system 410 transmits the ID code signal read from the non-contact IC card to the control device 133 of the vehicle-mounted electronic key 130. The mobile terminal charging terminal 420 is connected to the power supply 1334.

The door lock control circuit 1331 permits the unlocking and locking of the door lock of the vehicle 1. Further, when the ID code signal is transmitted from the NFC system 410, the door lock control circuit 1331 supplies power from the power supply 1334 to the mobile terminal charging terminal 420, or turns on the power supply 1334. On the other hand, the engine start control circuit 1332 permits the engine to start when the ID code signal is received from the mobile terminal 200 connected to the mobile terminal charging terminal 420.

FIG. 7 is a flowchart showing a process when the key system 400 of the present embodiment uses a non-contact IC card to unlock the door lock, charge the portable terminal 200, and start the engine 31. First, in step 41, the door lock control circuit 1331 determines whether or not the ID code signal has been transmitted from the NFC system 410. If a positive judgment is made in this step, the door lock is unlocked and the process proceeds to step 42.

In step 42, the door lock control circuit 1331 supplies power from the power supply 1334 to the mobile terminal charging terminal 420. In this step, power may be supplied to all in-vehicle devices and terminals. Next, in step 43, the engine start control circuit 1332 receives the ID code from the mobile terminal 200 supplied with power from the power supply 1334, and if received, executes the ID code authentication process, and the authentication is established. If so, the process proceeds to step 44, and if the authentication is not established, the process proceeds to step 45.

In step 44, the engine start control circuit 1332 permits the engine to start. This completes the process. On the other hand, in step 45, the door lock control circuit 1331 determines whether or not a predetermined time T1 has elapsed from the unlocking of the door lock. The predetermined time T1 is set to the time until the power required for restarting the out-of-charge mobile terminal 200, starting the application, and transmitting a signal is charged. In this step, in the case of an affirmative determination, the process proceeds to step 46, and in the case of a negative determination, the process returns to step 42. In step 46, the door lock control circuit 1331 stops the power supply from the power supply 1334 to the mobile terminal charging terminal 420. This completes the process.

As described above, in the key system 400 according to the present embodiment, the function of the non-contact IC card is limited only to permit access to the inside of the vehicle 1 and power supply to the mobile terminal 200, and the mobile terminal 200 is used. Only the owner of the vehicle 1 is allowed to start the engine of the vehicle 1. This has the effect of improving the security of the vehicle 1.

FIG. 8 is a diagram showing an outline of a vehicle 1 to which the key system 500 according to another embodiment is applied. In the key system 500 shown in this figure, a pair of electronic key authentication ECUs 120 are provided in the vehicle 1, one electronic key authentication ECU 120 is provided exclusively for the authentication process of the electronic key 110, and the other electronic key authentication ECU 120 is provided. Is provided exclusively for the authentication process of the mobile terminal 200. The communication device 121 included in the electronic key authentication ECU 120 for authentication processing of the mobile terminal 200 is connected to the communication device 132 of the vehicle-mounted electronic key 130 by a wired line 501.

The door lock control circuit 1331 of the vehicle-mounted electronic key 130 performs authentication processing of the ID code received by the communication device 131 from the communication device 202 of the mobile terminal 200, and when the ID code authentication is established, the door lock is locked / unlocked. The command signal and the ID code signal are transmitted from the communication device 132 to the communication device 121 of the electronic key verification ECU 120 through the wired line 501.

The control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the body control of the door lock unlocking / locking command signal via the in-vehicle LAN 8. It is transmitted to the device 2. Here, while the power switch 1333 is off, the ID code signal is not transmitted from the engine start control circuit 1332 to the communication device 121 of the electronic key authentication ECU 120, so that the body control device 2 unlocks / locks the door lock. On the other hand, starting the engine is prohibited.

When the power switch 1333 is turned on, the engine start control circuit 1332 transmits an ID code signal from the communication device 132 to the communication device 121 of the electronic key authentication ECU 120 through the wired line 501. The control device 122 of the electronic key authentication ECU 120 executes the authentication process of the ID code signal received by the communication device 121, and when the authentication is established, the signal permitting the engine start is transmitted to the body control device 2 via the vehicle-mounted LAN 8. Send. As a result, the body control device 2 starts the engine when the engine start button 22 is operated with the brake switch turned on.

As described above, in the key system 500 according to the present embodiment, the authentication process of the mobile terminal 200 is performed via the authentication process of the electronic key that has been conventionally mounted on the vehicle and the security is ensured. This makes it possible to improve the security of the key system 500 that uses the electronic key 110 and the mobile terminal 200 to perform the operation of the vehicle-mounted device, including at least unlocking and locking the door. Here, when a signal for instructing the operation of the in-vehicle device is directly transmitted from the mobile terminal 200 to the body control device 2, a high-level security function is required on the body control device 2 side. According to the key system 500 of the embodiment, security equivalent to that of a key system using a conventional electronic key (without using a mobile terminal) is ensured without adding a security function to the body control device 2. Can be done.

Further, the key system 500 of the present embodiment has a configuration in which an electronic key authentication ECU 120 and an in-vehicle electronic key 130 are added in comparison with the conventional key system. Therefore, the key system 500 of the present embodiment can be configured by attaching the electronic key authentication ECU 120 and the in-vehicle electronic key 130 to the vehicle 1 that has already been sold and is equipped with the conventional key system.

It should be noted that the embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above-described embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, in the above-described embodiment, the operation of the in-vehicle device performed by using the mobile terminal 200 is unlocking / locking the door lock and starting the engine, but the mobile terminal 200 is used to start the air conditioner or the door window. It may be opened and closed. Further, in the above-described embodiment, the authentication device of the mobile terminal 200 is unitized as an in-vehicle electronic key 130, but it is not essential and the communication devices 131 and 132 and the control device 133 may be individually provided in the vehicle 1. .. Further, the configuration of the authentication device of the mobile terminal 200 can be appropriately changed, such as adding an antenna for increasing the reception sensitivity from the mobile terminal 200 to the communication device 131.

1 Vehicle 100 key system 110 electronic key 120 electronic key authentication ECU
121 Communication device 122 Control device 130 In-vehicle electronic key 131 Communication device 132 Communication device 133 Control device 1331 Door lock control circuit 1332 Engine start control circuit 1333 Power switch 1334 Power supply 200 Portable terminal

Claims (9)

Depending on the result of the electronic key authentication process that authenticates the ID code wirelessly transmitted from the electronic key, it is determined whether or not the in-vehicle device including at least the unlocking and locking of the door is allowed to operate, and from a mobile terminal having a key function. It is a control method of an in-vehicle device using a key system for determining whether or not the operation of the in-vehicle device is permitted according to the result of a mobile terminal authentication process for authenticating a wirelessly transmitted ID code.
The mobile terminal authentication process is
The first authentication process in which the ID code wirelessly transmitted from the mobile terminal is authenticated by the in-vehicle mobile terminal authentication device, and
When the first authentication process is established, the ID code is transmitted from the mobile terminal authentication device to the electronic key authentication device, and the authentication of the ID code transmitted from the mobile terminal authentication device is performed by the electronic key. It is equipped with a second authentication process performed by the authentication device.
Only when the door is unlocked and locked by the establishment of the first authentication process and the door is unlocked, the mobile terminal authentication device is permitted to start the traveling drive source.
When the door is unlocked and locked by the establishment of the first authentication process and the door is locked, the mobile terminal authentication device does not permit the start of the traveling drive source.
A method of controlling in-vehicle devices using a key system. A method for controlling an in-vehicle device using the key system according to claim 1 .
The radio field strength of the wireless transmission signal received when the electronic key authentication device permits the start of the traveling drive source is the radio field strength of the wireless transmission signal when the ID code is transmitted from the mobile terminal authentication device to the electronic key authentication device. The strength is within a predetermined range corresponding to the radio field strength received by the electronic key authentication device when the electronic key is present in the vehicle.
The radio field strength of the wireless transmission signal received when the electronic key authentication device permits the door to be unlocked or locked is the radio strength of the wireless transmission signal when the ID code is transmitted from the mobile terminal authentication device to the electronic key authentication device. A method for controlling an in-vehicle device using a key system whose strength is not included in the predetermined range. A method for controlling an in-vehicle device using the key system according to claim 1.
In the electronic key authentication process and the second authentication process, the electronic key authentication device is shared.
In the second authentication process, a method for controlling an in-vehicle device using a key system, in which the same signal as the signal wirelessly transmitted from the electronic key is wirelessly transmitted from the mobile terminal authentication device to the electronic key authentication device. .. A method for controlling an in-vehicle device using the key system according to claim 1 .
A method of controlling an in-vehicle device using a key system that turns on the power of a traveling drive source starting control circuit that determines whether or not to allow the traveling drive source to be started when the door is unlocked and locked. A method for controlling an in-vehicle device using the key system according to claim 4 .
A method for controlling an in-vehicle device using a key system, which permits the door to be locked only when the power of the traveling drive source start control circuit is turned off. A method for controlling an in-vehicle device using the key system according to any one of claims 1 to 5 .
Authority granting information including at least an ID code for granting the second user the authority to operate the in-vehicle device possessed by the first user from any one of the plurality of mobile terminals to the other mobile terminal. Is transmitted, in the first authentication process, a method for controlling an in-vehicle device using a key system, in which the ID code wirelessly transmitted from the other mobile terminal is authenticated by the mobile terminal authentication device. A method for controlling an in-vehicle device using the key system according to claim 6 .
When the authority granting information including the authority restriction information for limiting the operation authority of the in-vehicle device is transmitted from any one of the plurality of mobile terminals to the other mobile terminal, the authority restriction information is used. Accordingly, a method for controlling an in-vehicle device using a key system for determining whether or not the in-vehicle device is allowed to operate. A method for controlling an in-vehicle device using the key system according to any one of claims 1 to 7 .
A method for controlling an in-vehicle device using a key system, in which an ID card is authenticated by an in-vehicle ID card reader and the door is unlocked and locked according to the result of the ID card authentication process. Depending on the result of the electronic key authentication process that authenticates the ID code wirelessly transmitted from the electronic key, it is determined whether or not the in-vehicle device including at least the unlocking and locking of the door is allowed to operate, and from a mobile terminal having a key function. It is a key system that determines whether or not the in-vehicle device can be operated according to the result of the mobile terminal authentication process that authenticates the wirelessly transmitted ID code.
With an electronic key
An in-vehicle mobile terminal authentication device that performs a first authentication process that authenticates an ID code transmitted from the mobile terminal.
It is provided with an electronic key authentication device that performs a second authentication process that authenticates the ID code transmitted from the mobile terminal authentication device when the first authentication process is established.
The mobile terminal authentication device is
Only when the door is unlocked and locked by the establishment of the first certification process and the door is unlocked, the traveling drive source is permitted to start.
When the door is unlocked and locked by the establishment of the first certification process and the door is locked, the start of the traveling drive source is not permitted.
Key system.

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