JP5067567B2 - Smart key system - Google Patents

Description

  The present invention relates to a smart key system for a vehicle.

  This type of smart key system includes, for example, a portable device that transmits a vehicle-specific ID code to an in-vehicle device in response to an inquiry signal from the in-vehicle device, as described in Patent Documents 1 and 2 below. It is possible to realize a smart function that automatically permits door lock or door unlock or engine start on condition that the ID code matches. In the smart key system described in Patent Document 1, the user inserts an actual mechanical key into the keyhole of the door of the vehicle, locks or unlocks the door, and turns on the key interlocking switch. It is configured to stop outputting the signal. Further, in the smart key system described in Patent Document 2, the user stops the output of the inquiry signal from the in-vehicle device by operating the portable device using an operation method different from the normal operation method. It is configured. According to these, it is possible to realize a smart function invalidation operation (smart cancellation operation) with a simple configuration.

JP-A-2005-240314 JP 2005-256472 A

  By the way, in recent years, with the diversification of vehicles, there are vehicles (open cars) in which the whole or a part of the ceiling of the vehicle can be opened and closed by an electric motor, and the smart key system is applied to such open cars. Technology is also being developed. However, in the above-described open car, a lot of motor noise is generated when the ceiling is opened and closed. For this reason, when the ceiling portion is opened and closed, the ID code cannot be correctly verified, and the smart function may not operate normally. If the smart function does not operate normally, for example, an alarm may be activated erroneously or the engine cannot be started. As a measure to solve this problem, the smart function invalidation process (existing process) corresponding to the smart cancel operation itself has been changed to establish a process that prevents the smart function from operating normally. Conceivable. In this case, however, the newly established process may adversely affect the process corresponding to the existing process, and it is necessary to reconfirm the guarantee of the process result from the beginning.

  The present invention has been made to cope with the above-described problem, and an object of the present invention is to configure a process in which the smart function does not operate normally in a mode in which the influence on the existing process is suppressed. is there.

  In order to achieve the above object, according to the present invention, the whole or a part of the ceiling of a vehicle can be opened and closed by an electric actuator, and an ID code unique to the vehicle is applied to the in-vehicle device in response to an inquiry signal from the in-vehicle device. A smart function that includes a portable device for transmission and that automatically allows the vehicle door to be locked or unlocked or allows the engine to start can be realized on condition that the ID code matches. Is a smart key system that can be disabled or effectively switched according to the operation of the smart function switching operation means provided in the portable device or the vehicle, and the smart function according to the smart switching signal from the smart function switching operation means When it is determined that the smart function is valid, the smart function is disabled, and when it is determined that the smart function is invalid, the smart function is enabled. The smart switching signal reception processing means for deriving the processing result to be turned off, the smart function is invalidated when it is determined that the electric actuator is in operation, and the smart function is determined when it is determined that the electric actuator is not in operation. It is determined that the smart function operates normally based on the processing results of the actuator operation signal reception processing means for deriving the processing result for enabling, the smart switching signal reception processing means and the actuator operation signal reception processing means. And an arbitration processing means for determining whether to activate the smart function, and determining to deactivate the smart function when it is determined that the smart function does not operate normally. In this case, when invalidation of the smart function is determined by the arbitration processing unit, it is preferable that the transmission of the inquiry signal from the in-vehicle device is stopped.

  In the smart key system of the present invention, the smart switching signal reception processing means derives a processing result related to enabling or disabling the smart function corresponding to the smart switching signal, and the actuator operation signal receiving processing means supports the actuator operation signal. A processing result related to enabling or disabling the smart function is derived. Then, based on both processing results, the arbitration processing means determines that the smart function is activated when it is determined that the smart function operates normally, and determines that the smart function does not operate normally when it determines that the smart function does not operate normally. Is disabled. As a result, it is possible to satisfactorily prevent the smart function from being in a state of not operating normally.

  Further, in the smart key system of the present invention, the smart switching signal reception processing corresponds to the existing processing. Therefore, the smart switching signal reception process itself is substantially the same as the conventional process, but the final result is determined by the arbitration process by adding the processing result of the actuator operation signal reception process to the processing result. Has been. For this reason, even when the newly-actuated actuator operation signal reception process and arbitration process are executed, it is possible to satisfactorily suppress adverse effects on the smart switching signal reception process.

  In carrying out the present invention, the arbitration processing means is configured to determine invalidation of the smart function when a processing result indicating that the smart function is invalidated is derived by the actuator activation signal reception processing means. Good. According to this, since the smart function is always invalidated during the operation of the electric actuator, it is possible to almost certainly prevent the malfunction of the alarm device due to the operation noise of the electric actuator.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a side view of a vehicle 10 to which a smart key system 1 of the present invention is applied, and FIG. 2 shows a block diagram of the smart key system 1 of the present invention. The vehicle 10 includes a roof (metal top) 11 that can be opened and closed entirely. The roof 11 is either in a fully open state (the state shown in FIG. 1 (a)) housed in the trunk 12 at the rear of the vehicle or in a fully closed state (the state shown in FIG. 1 (b)) that seals the vehicle interior. It is driven to open and close. Note that the roof 11 is not limited to the mode shown in FIG. 1, and may be, for example, a hood shape that can be in a half-open state or a sun roof shape that allows a part of the ceiling portion to be opened and closed.

  The smart key system 1 includes a verification ECU 100 mounted on the vehicle 10 and a smart key (wireless portable key, electronic key) 20.

  The verification ECU 100 includes a microcomputer including a CPU, a ROM, a RAM, a memory, an input / output unit (I / O) and the like as main components, and repeatedly executes each processing program stored in the ROM in FIGS. To do. An external storage device 101, an outside vehicle transmitter 111, an in-vehicle transmitter 112, and a receiver 120 are connected to the verification ECU 100. The storage device 101 stores a verification master code (master ID) unique to the vehicle.

  As shown in FIG. 3, the outside-vehicle transmitter 111 is provided in the driver's seat, front passenger seat, and trunk opening / closing door of the vehicle. The vehicle interior transmitter 111 is built in, for example, a handle portion of each door, and periodically transmits an inquiry signal (for example, an electromagnetic wave in an LF (long wave) band) around the door. The output of this inquiry signal is adjusted so as to reach only within a predetermined key response area SA (external vehicle detection area) of about 70 cm to 1 m from each door. Thereby, only the smart key 20 existing in the key response area SA can receive this inquiry signal.

  The vehicle interior transmitter 112 is provided at each of the front and rear of the vehicle interior. The vehicle interior transmitter 112 periodically transmits an inquiry signal (for example, electromagnetic waves in the LF (long wave) band) to the vehicle interior. The output of this inquiry signal is adjusted so as to reach only within a predetermined key response area TA (in-vehicle detection area) in the vehicle interior. Thereby, only the smart key 20 existing in the key response area TA can receive this inquiry signal.

  The receiver 120 receives a response signal (for example, an electromagnetic wave in an RF (high frequency) band) from the smart key 20 in the key response areas SA and TA, and sends it to the verification ECU 100. Note that the response signal from the smart key 20 includes data that can identify in which of the key response areas SA and TA the smart key 20 exists.

  Returning to FIG. 1, the verification ECU 100 controls the metal top ECU 200 that controls the opening and closing of the roof 11 via the in-vehicle LAN 50, the door lock ECU 300 that locks or unlocks the vehicle door (including the trunk door), and the engine. The engine ECU 400 is connected.

  The metal top ECU 200 includes a microcomputer including a CPU, a ROM, a RAM, a memory, an input / output unit (I / O), and the like as main components. The metal top ECU 200 includes an open / close switch 201 (open / close operation means) for opening and closing the roof 11 and a roof for driving the roof 11 to open / close from a fully open state to a fully closed state or from a fully closed state to a fully open state. A drive circuit 203 of a motor 202 (electric actuator) is connected. A switch signal (on / off signal) of the open / close switch 201 is transmitted from the metal top ECU 200 to the verification ECU 100 via the in-vehicle LAN 50.

  The door lock ECU 300 includes a microcomputer including a CPU, a ROM, a RAM, a memory, an input / output unit (I / O), and the like as main components. The door lock ECU 300 is connected to a drive circuit 302 of a door motor 301 that switches a lock mechanism (not shown) of a vehicle door to a locked state or an unlocked state.

  Engine ECU 400 includes a microcomputer including a CPU, a ROM, a RAM, a memory, an input / output unit (I / O), and the like as main components. The engine ECU 400 is connected with an ignition switch 401. A switch signal (ON / OFF signal) of the ignition switch 401 is transmitted from the engine ECU 400 to the verification ECU 100 via the in-vehicle LAN 50.

  The verification ECU 100 is configured to transmit a control signal to the door lock ECU 300 and the engine ECU 400 via the in-vehicle LAN 50. Specifically, verification ECU 100 transmits to door lock ECU 300 a control signal indicating that the lock mechanism is to be locked or unlocked. In response to this, the door lock ECU 300 rotationally drives the door motor 301 via the drive circuit 302 (a smart lock function as one function of the smart lock function).

  In addition, verification ECU 100 transmits to engine ECU 300 a control signal indicating that engine start is permitted in response to a predetermined switch operation not using a mechanical key. In response, engine ECU 400 starts the engine (smart ignition function as one function of the smart function).

  The smart key 20 (portable device) functions as a portable wireless device capable of transmitting and receiving data to and from the verification ECU 100, and includes a microcomputer 21 and a wireless communication circuit having a known modulation / demodulation circuit unit. The unit 22 and the wireless switch 30 are provided. The microcomputer 21 has a memory (not shown) for storing an ID code unique to the vehicle. The microcomputer 21 is activated by an inquiry signal from the vehicle interior transmitter 111 or the vehicle interior transmitter 112 and transmits a response signal including an ID code to the receiver 120 via the wireless communication circuit unit 22.

  The wireless switch 30 includes a push button type lock switch 31, an unlock switch 32, a trunk unlock switch 33, a smart cancel switch 34 (smart function switching operation means), and the like. Each switch 31-33 is an operation switch for making a vehicle door into a locked state or an unlocked state. The smart cancel switch 34 is an operation switch for canceling the smart function described above, that is, invalidating the smart function if it is valid, and validating the smart function if it is invalid.

  That is, the smart key system 1 is configured to be able to perform smart cancellation manually by operating the smart cancel switch 34 in addition to the configuration that automatically provides the smart function described above. The smart key 20 transmits a vehicle door lock or unlock signal to the verification ECU 100 according to the operation of each of the switches 31 to 33, and transmits a smart switching signal to the verification ECU 100 according to the operation of the smart cancel switch 34. Instead of providing the smart cancel switch 34 as the smart function switching operation means, for example, the smart function is configured to be switched between valid / invalid by pressing and holding the lock switch 31, or the user can enter the keyhole of the driver's door of the vehicle. An actual mechanical key may be inserted, and the smart function may be switched between valid / invalid according to door lock / unlock operation and door open / close operation.

  Next, the operation of the embodiment configured as described above will be described using the processing programs of FIGS. FIG. 4 is a flowchart showing a signal transmission processing program at the time of transmission of a smart switching signal corresponding to the smart cancel operation, and FIG. 5 is a smart switching signal reception processing program at the time of receiving the smart switching signal corresponding to the smart cancellation operation. FIG. 6 is a flowchart showing a roof motor operation signal reception processing program upon reception of a switch signal corresponding to the operation of the opening / closing switch 201, and FIG. 7 is based on both processing results of FIG. 5 and FIG. FIG. 8 is a flowchart showing an engine start control program showing an example of a smart function. 4 is executed by the microcomputer 21 of the smart key 20, and FIGS. 5 to 8 are executed in parallel by the verification ECU 100.

  In the signal transmission processing program of FIG. 4, in response to the smart cancel operation by the smart cancel switch 34 (S11: YES), the microcomputer 21 of the smart key 20 transmits a smart switching signal to the verification ECU 100 (S12). When the smart cancel switch 34 is not operated (S11: NO), the execution of the signal transmission processing program is temporarily terminated.

  In the smart switching signal reception processing program of FIG. 5, when the state transition condition is satisfied, that is, when the smart switching signal is received from the smart key 20 (S21: YES), the smart function in the smart key system 1 is currently effective. It is determined whether or not (S22). If the smart function is currently valid, a processing result for deactivating the smart function is derived (S22: YES, S23). On the other hand, if the smart function is currently disabled, a processing result for enabling the smart function is derived (S22: NO, S24).

  In the roof motor operation signal reception processing program in FIG. 6, whether the roof is operating, that is, a switch signal from the open / close switch 201 is acquired from the metal top ECU 200 via the in-vehicle LAN 50, and the open / close switch 201 If the switch signal is on, a processing result for deactivating the smart function is derived (S31: YES, S32). On the other hand, when the switch signal of the open / close switch 201 is OFF, a processing result for enabling the smart function is derived (S31: NO, S33).

  7 acquires the processing result of the smart switching signal reception processing program of FIG. 5 (S41), and acquires the processing result of the roof motor operation signal reception processing program of FIG. 6 (S42). The final smart function is determined to be valid or invalid based on both processing results (S43).

  Specifically, in step S43, the smart function is finally determined with reference to, for example, the smart function determination table shown in FIG. 9 stored in the ROM of the verification ECU 100. This smart function determination table predetermines the final determination result according to the combination of the processing result of the smart switching signal reception processing and the processing result of the roof motor operation signal reception processing. If either one of the results is invalid, the smart function invalidation is finally determined.

  If both processing results are valid and the final decision is validated, the smart function is deactivated when one of the both processing results is invalidated. If both processing results are invalid and the final decision is invalidated, the smart function invalidation is determined to be maintained even if either one of the two processing results becomes valid.

  In the engine start control program of FIG. 8, the processes after step S51 are executed based on the final result at step S43 in the arbitration process. When the smart function is currently active and the user on the vehicle does not operate the smart cancel switch 34 and does not operate the open / close switch 201 of the roof 11, the verification ECU 100 uses the on operation of the ignition switch 401 as a trigger. An ID code request signal as a vehicle interior verification signal is transmitted to the vehicle interior transmitter 112 (S51 in FIG. 8: YES, S52).

  After the transmission of the ID code request signal, the system enters a reception standby state for the ID code wirelessly transmitted from the smart key 20 side (S53). When the receiver 120 does not receive the ID code (S54: NO), the process of steps S53, S54, and S59 is repeatedly executed until a predetermined time has elapsed after the ID code request signal is transmitted (S59: NO). . However, if the receiver 120 does not receive the ID code even after a predetermined time has elapsed since the transmission of the ID code request signal (S54: NO, S59: YES), it is determined that the smart key 20 does not exist in the passenger compartment. Then, after executing a predetermined warning notification process (for example, buzzer output or voice guidance), the execution of the engine start control program is terminated.

  When the receiver 120 receives the ID code (S54: YES), the received ID code is compared with the master code (master ID) stored in the storage device 101 (S55). If the verification matches (authentication accepted) (S56: YES), a control signal for permitting engine start is output to the in-vehicle LAN 50 (S57). Engine ECU 400 receives this control signal and starts an engine start process.

  If the verification does not match (rejection of authentication) (S56: NO), this engine start control program is executed after executing a predetermined warning notification process (for example, buzzer output or voice guidance) without permitting the engine to start. The execution of is terminated.

  On the other hand, when the smart function is currently active and the user who has got on the vehicle operates the smart cancel switch 34, when the smart function is currently active and the user who has got on the vehicle operates the open / close switch 201 of the roof 11, or smart If the function is currently valid and the user on the vehicle operates the smart cancel switch 34 and also operates the open / close switch 201 of the roof 11 or if the smart function is currently disabled (S51: NO), the vehicle The transmission of the indoor verification signal is stopped, that is, the transmission of the ID code request signal from the vehicle interior transmitter 112 is stopped. Thereby, collation ECU100 complete | finishes execution of this engine start control program, after performing predetermined warning alerting | reporting processing (for example, buzzer output, voice guidance, etc.), without permitting engine start.

  As is clear from the above description, in this embodiment, the execution result of the smart switching signal reception processing program of FIG. 5 by the verification ECU 100 results in the processing result relating to the validation or invalidation of the smart function corresponding to the smart switching signal. Derived, and the execution result of the roof motor operation signal reception processing program of FIG. 6 derives the processing result related to the activation or deactivation of the smart function corresponding to the switch signal of the open / close switch 201. When it is determined by the execution of the arbitration processing program that the smart function operates normally based on both processing results, that is, when both processing results are both valid, the smart function is determined to be activated. Is determined not to operate normally, that is, when one of the two processing results is invalid, it is determined to disable the smart function (see FIG. 9). As a result, it is possible to satisfactorily prevent the smart function from being in a state of not operating normally.

  In the above embodiment, the smart switching signal reception processing program of FIG. 5 corresponds to the existing processing. Therefore, the smart switching signal reception processing program itself in the above embodiment is substantially the same as the conventional processing, but the processing result of the roof motor operation signal reception processing program in FIG. 6 is added to the processing result. Since the final result is determined by the arbitration processing program of FIG. 7, even if the newly installed roof motor operation signal reception processing program of FIG. 6 and the arbitration processing program of FIG. It is also possible to satisfactorily suppress adverse effects on the execution of the smart switching signal reception processing program 5.

  Further, in the processing of step S43 in the arbitration processing program, when the processing result indicating that the smart function is invalidated is derived by executing the roof motor operation signal reception processing program (S32), the smart function invalidation is determined. (See FIG. 9). According to this, since the smart function is always invalidated during the operation of the roof motor 202, it is possible to almost certainly prevent the malfunction of the alarm device due to the operation noise of the roof motor 202.

(A) is a side view which shows the fully open state where the roof was accommodated in the trunk in the vehicle to which the smart key system of the present invention is applied. (B) is a side view showing a fully closed state in which the roof seals the passenger compartment in the vehicle of (a). The block diagram of the smart key system of this invention. The schematic diagram which shows the radio | wireless communication area of the smart key system of FIG. The flowchart which shows the signal transmission time processing program at the time of the transmission of the smart switching signal corresponding to smart cancellation operation performed by the microcomputer of the smart key of FIG. The flowchart which shows the processing program at the time of the smart switching signal reception at the time of reception of the smart switching signal corresponding to smart cancellation operation performed by collation ECU of FIG. The flowchart which shows the processing program at the time of reception of the motor operation signal for roofs at the time of reception of the switch signal performed by collation ECU of FIG. 7 is a flowchart illustrating an arbitration processing program that is executed by the verification ECU of FIG. 2 and determines a final result based on both processing results of FIGS. 5 and 6. The flowchart which shows the engine starting control program which is performed by collation ECU of FIG. 2, and shows an example of a smart function. Explanatory drawing which shows the smart function determination table referred at the time of execution of the arbitration processing program of FIG.

Explanation of symbols

1 Smart Key System 10 Vehicle 11 Roof (Vehicle Ceiling)
20 Smart Key (mobile device)
30 Wireless switch 34 Smart cancel switch (Smart function switching operation means)
50 in-car LAN
100 Verification ECU (in-vehicle equipment)
101 Storage device 111 Transmitter outside vehicle compartment (in-vehicle device)
112 Car interior transmitter (vehicle equipment)
120 receiver ((in-vehicle equipment)
200 Metal Top ECU
201 Open / close switch (open / close operation means)
202 Roof motor 300 Door lock ECU
301 Door lock motor 400 Engine ECU
401 Ignition switch

Claims (2)

The whole or a part of the ceiling of the vehicle can be opened and closed by an electric actuator, and includes a portable device that transmits an ID code unique to the vehicle to the in-vehicle device in response to an inquiry signal from the in-vehicle device, It is possible to realize a smart function that automatically permits the locking or unlocking of the vehicle door or the engine start on condition that the ID code matches, and the smart function is provided in the portable device or the vehicle. A smart key system that can be disabled or enabled to be switched according to the operation of the smart function switching operation means,
When the smart function is determined to be valid according to a smart switching signal from the smart function switching operation means, the smart function is disabled, and when the smart function is determined to be invalid, the smart function is enabled. Smart switching signal reception processing means for deriving a processing result to the effect,
When it is determined that the electric actuator is in operation, the smart function is invalidated, and when it is determined that the electric actuator is not in operation, an actuator operation signal is received to derive a processing result for enabling the smart function. Time processing means;
Based on both processing results by the smart switching signal reception processing means and the actuator operation signal reception processing means, when it is determined that the smart function operates normally, the smart function is determined to be activated, and the smart function is determined. Arbitration processing means for determining the disabling of the smart function when it is determined that does not operate normally,
A smart key system comprising:   2. The smart key system according to claim 1, wherein the arbitration processing unit determines invalidation of the smart function when a processing result indicating that the smart function is invalidated is derived by the actuator operation signal reception processing unit. .

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