JP2009051336A - Vehicle antitheft system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle antitheft system further improvable in antitheft performance. <P>SOLUTION: A specified vehicle state that a possibility of a theft exists in a parking vehicle is set, and a traveling preparation operation of the vehicle is set. This vehicle antitheft system 11 monitors the state of the parking vehicle and detects the traveling preparation operation of an illicit vehicle, the system 11 beings the vehicle into a traveling impossible state by inhibiting the start of an engine E as a crime prevention operation. Since the start of the engine E is instantly inhibited without determining the propriety of an electronic key in a cabin, the antitheft performance of the vehicle is further improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle antitheft system.

Conventionally, for example, a vehicle antitheft system (immobilizer: electronic movement lock device) as disclosed in Patent Documents 1 and 2 has been proposed. The control device of this system determines the validity of the electronic key through wireless communication with the electronic key when a user having the electronic key gets into the vehicle interior. That is, the control device collates the ID code stored in the electronic key with the ID code stored on the vehicle side, and permits the engine to start when the two ID codes match. In the state where the start of the engine is permitted, the engine is started by pressing an engine switch provided in the vicinity of the driver's seat. On the other hand, when the ID code from the electronic key cannot be read or the ID code does not match, the engine start is prohibited. This prevents the vehicle from being stolen.
JP 2005-248859 A JP 2005-125895 A

  In recent years, the number of organized or planned vehicle theft cases has been increasing year by year, and theft techniques have also been diversified and sophisticated. For example, there are concerns about theft by replacing the control device of the system, and even theft by decoding the ID code of the electronic key. However, in the conventional anti-theft system, even when the control device is replaced or the ID code is decrypted by unauthorized access to the control device, the engine may be prohibited from starting depending on these operations. It will never be done. That is, when the control device replacement work or the ID code decoding by a third party is successful, the engine is started and the vehicle may be stolen. This is because the conventional anti-theft system only prohibits starting of the engine only when the ID code of the electronic key cannot be read or when the ID code does not match. From such a situation, further enhancement of the anti-theft performance of the vehicle is strongly desired.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle anti-theft system that can further enhance the anti-theft performance.

  In order to achieve the above-mentioned object, the invention according to claim 1 determines the validity of the electronic key through wireless communication with the electronic key when the user having the electronic key gets into the vehicle. Vehicle anti-theft system that permits the start of the engine, which is the power source of the vehicle when it is determined to be appropriate, and prohibits the start of the engine when it is determined that the vehicle is not valid. The vehicle state detecting means for detecting a specific vehicle state assumed in advance to be likely to be stolen, and the vehicle state being parked are monitored and the specific vehicle state is detected by the vehicle state detecting means. The gist of the invention is that it comprises control means for controlling the vehicle so that the vehicle is sometimes unable to travel due to the possibility of theft of the vehicle.

  When a user with an electronic key gets into the vehicle, the conventional vehicle antitheft system determines the validity of the electronic key through wireless communication with the electronic key. While it is permitted to start the engine, the engine is prohibited from starting when it is determined to be invalid. However, this conventional vehicle antitheft system only prohibits starting the engine only when it is determined that the electronic key is not valid, and prohibits starting the engine even for a specific vehicle state that is parked. It wasn't.

  Here, it is assumed that the validity of the electronic key is determined based on whether or not the ID code stored in the electronic key and the ID code stored on the vehicle side are matched. Theft techniques are becoming more and more sophisticated, and there has been some concern about theft caused by, for example, decoding the ID code of the electronic key described above. In this regard, according to the vehicle antitheft system of the present invention, there is a risk of vehicle theft when the vehicle state detecting means detects a specific vehicle state that is predetermined as the possibility of theft during parking. As described above, the vehicle is controlled so that the vehicle cannot travel. That is, the validity of the electronic key is not judged in the passenger compartment, and the vehicle is immediately disabled when the specific vehicle state described above is detected. Therefore, the antitheft performance of the vehicle can be enhanced.

  In the vehicle anti-theft system according to claim 1, the vehicle state detection means, as described in claim 2, is a travel preparation operation detection that detects a vehicle preparation operation as the specific vehicle state. Or an intrusion detection means for detecting an intrusion into a vehicle compartment as the specific vehicle state, or a vehicle as the specific vehicle state as described in claim 4. It is possible to employ a fraud detection means for detecting a fraudulent act. Even if any of the configurations of the vehicle state detection means described in claims 2 to 4 is adopted, when a specific vehicle state is detected by the vehicle state detection means in a parked vehicle, the vehicle is It becomes impossible to run.

  And as described in Claim 5, in the vehicle antitheft system according to any one of Claims 1 to 4, the control means controls the vehicle so as to make the vehicle unable to travel. It is preferable to control the vehicle to cancel the vehicle inoperable state when a predetermined release time has elapsed since the start of the vehicle. According to this configuration, for example, it is assumed that a specific vehicle state is erroneously detected due to some cause, for example, even if the vehicle is erroneously disabled due to the erroneous detection, only a predetermined release time When the time has elapsed, the vehicle inoperable state is canceled, so there is no major problem in terms of convenience for the user.

  Further, as described in claim 6, in the vehicle antitheft system according to any one of claims 1 to 5, when a specific vehicle state is detected by the vehicle state detection means, the vehicle It is preferable to prohibit starting of the engine which is the power source of the engine. In this way, the vehicle can surely be disabled. Further, as described in claim 7, in the vehicle anti-theft system according to any one of claims 1 to 5, unlocking of the steering lock device that mechanically locks the steering wheel. It is also possible to adopt a configuration that prohibits the operation. Even in such a configuration, the vehicle cannot run because the steering wheel cannot be operated.

  On the other hand, as described in claim 8, in the vehicle antitheft system according to claim 2, as the travel preparation operation detecting means, a shift position sensor for detecting an operation of the shift lever to a position other than the parking range, and parking It is possible to employ at least one of a parking brake switch that detects a brake release operation and a power monitoring unit that detects power-on of the vehicle.

  According to a ninth aspect of the present invention, in the vehicle antitheft system according to the third aspect, the intrusion detection means detects at least one of an open / closed state of the door glass of the vehicle and the presence / absence of cracking of the door glass. It is possible to employ door glass state detection means.

  According to a tenth aspect of the present invention, in the vehicle antitheft system according to the third aspect, as the intrusion detection means, a seat switch for detecting the presence or absence of seating on a seat provided in the passenger compartment, You may make it employ | adopt at least one among the camera which image | photographs, and the human sensor provided in a vehicle interior.

  Furthermore, as described in claim 11, in the vehicle antitheft system according to claim 3, the intrusion detection means may include a door switch for detecting an open / closed state of the door of the vehicle. is there. In this case, when the user who possesses the electronic key gets into the vehicle, the control means determines the validity of the electronic key through wireless communication with the electronic key and determines that the electronic key is valid. It includes a locking / unlocking control means for permitting or unlocking. The control means is configured to make the vehicle unrunnable when a detection signal indicating an open state of the door is input from the door switch while the electronic key is determined to be invalid by the locking / unlocking control means. To control.

  According to a twelfth aspect of the present invention, in the vehicle antitheft system according to the fourth aspect, as a fraud detection means, a bonnet switch for detecting the open / closed state of the hood of the vehicle, and whether or not the power is cut off. It is also possible to employ at least one of the power detection means for detecting.

  According to the present invention, it is not necessary to judge the validity of the electronic key in the passenger compartment, and when a vehicle state preliminarily assumed to be a vehicle theft is detected, the vehicle is immediately disabled. Further enhancement of the anti-theft performance of the vehicle is achieved.

<First Embodiment: Detection of Unauthorized Driving Preparation Operation>
Hereinafter, a first embodiment embodying a vehicle antitheft system according to the present invention will be described with reference to FIG. The vehicle anti-theft system according to the present embodiment monitors the state of a parked vehicle, and when an illegal vehicle travel preparation operation is detected as a specific vehicle state that is assumed in advance as being likely to be stolen. As a crime prevention operation, the vehicle is disabled.

  As shown in FIG. 1, the vehicle antitheft system 11 mounted on the vehicle 10 includes a verification control device 12 that determines the validity of the electronic key K possessed by the user, and a power supply control device 13 that controls the power supply of the vehicle 10. The steering lock control device 14 that controls mechanical locking / unlocking of the steering wheel and the engine control device 15 that controls the engine E are provided. The verification control device 12, the power supply control device 13, the steering lock control device 14, and the engine control device 15 are connected to each other through a bus (multiplex communication line) B.

<Verification control device>
The verification control device 12 includes a plurality of vehicle interior transmitters 21 (only one is illustrated in FIG. 1), a plurality of vehicle interior transmitters 22 (only one is illustrated in FIG. 1), and reception. Machine 23 is connected. The outside transmitter 21 is disposed, for example, inside each side door and luggage door of the vehicle 10 and transmits a radio signal in the LF band outside the passenger compartment. The vehicle interior transmitter 22 is disposed, for example, under the floor of the vehicle 10 and transmits a radio signal in the LF band to the vehicle interior. The receiver 23 is provided, for example, inside a pillar on the rear seat side of the vehicle 10 and receives an RF band radio signal.

  In addition, a touch sensor 24 and a door lock switch 25 are connected to the verification control device 12. The touch sensor 24 is provided on, for example, the back surface of a door outside handle (not shown) of the vehicle 10 and detects that the handle is gripped by the user. The door lock switch 25 is provided on the surface of the door outside handle and is pressed by the user when locking the unlocked door.

  Further, a key slot 26 is connected to the verification control device 12. The key slot 26 is disposed in the vicinity of a steering wheel (not shown) in the vehicle compartment, and the electronic key K is inserted when the engine E is started. The key slot 26 is incorporated in the electronic key K based on an instruction from the collation control device 12 and an insertion detection switch 27 a that detects the insertion state of the electronic key K and outputs the insertion detection signal to the collation control device 12. In addition, an antenna coil 27b for transmitting a driving radio wave serving as an operating power source for a transponder Ka described later is provided.

  Then, the verification control device 12 determines the validity of the electronic key K through wireless communication with the electronic key K possessed by the user, and locks and unlocks the door of the vehicle 10 based on the determination result. Specifically, in the parking state where the engine E is stopped and all the doors are closed, the verification control device 12 sends a response request for verification outside the vehicle to the electronic key K through the vehicle outside transmitter 21. By transmitting a signal Sreq (LF signal in the LF band), an outside communication area of the electronic key K is formed around the vehicle 10.

  When the user who possesses the electronic key K enters the vehicle exterior communication area and the electronic key K receives the response request signal Sreq for vehicle exterior verification, the electronic key K responds to the response request signal Sreq for vehicle exterior verification. A response signal Srep (RF band radio signal) is transmitted. Then, when receiving the response signal Srep through the receiver 23 in the passenger compartment, the verification control device 12 verifies the ID code registered therein and the ID code of the electronic key K included in the received response signal Srep. (External vehicle collation), and when the collation is established, the door unlocking is permitted and the touch sensor 24 is activated to enter the door unlock standby state. When the touch sensor 24 detects that the door outside handle is grasped while being kept in the door unlock standby state, the touch sensor 24 outputs a touch sensor ON signal to the verification control device 12. When receiving the touch sensor ON signal, the verification control device 12 outputs an unlock request signal for requesting unlocking of the door to the power control device 13.

  When the user holding the electronic key K opens the door and gets into the vehicle 10 after unlocking the door, the collation control device 12 detects this by a door courtesy switch 33 described later, and also transmits the vehicle interior transmitter 22. A response request signal Sreq for vehicle interior verification is transmitted through Thus, a vehicle interior communication area for the electronic key K is formed in the vehicle interior. When the electronic key K receives the response request signal Sreq for vehicle interior verification, it returns a response signal Srep for vehicle interior verification including an ID code unique to itself. Upon receiving the vehicle interior verification response signal Srep through the receiver 23, the verification control device 12 compares the ID code registered in the vehicle with the ID code included in the vehicle interior verification response signal Srep (vehicle interior verification). ) And temporarily stores the collation result.

  This is the same when the electronic key K is inserted into the key slot 26. In other words, the electronic key K normally operates using a built-in battery (not shown) as an operating power source, and is provided with a transponder Ka in preparation for the consumption of the battery. The transponder Ka includes a control IC (not shown) and a coil antenna connected to the IC. The control IC stores an ID code (transponder code) different from the ID code used at the time of vehicle exterior verification and vehicle interior verification. The transponder Ka is activated with a driving radio wave (electromagnetic field) emitted from an antenna coil 27b as a radio wave generation source provided in the vehicle interior, and automatically transmits an ID code stored in the control IC. On the premise of such a configuration of the electronic key K, the verification control device 12 receives a drive radio wave (electromagnetic field) through the antenna coil 27b when an insertion detection signal indicating that the electronic key K is inserted into the key slot 26 is input. To send. Then, the collation control device 12 collates the ID code included in the response signal Srep transmitted from the electronic key K upon receiving this driving radio wave and the ID code registered in itself, and temporarily stores the collation result. To do.

  And the collation control apparatus 12 performs the electronic control of various vehicle-mounted systems by using the judgment result of the validity of the electronic key K, ie, the collation result of ID code, according to the execution function of various vehicle-mounted systems including the vehicle anti-theft system 11. Send to device via bus B. Specifically, the collation control device 12 transmits the collation result of the ID code to the power supply control device 13, the steering lock control device 14, the engine control device 15, and the like shared by various in-vehicle systems via the bus B. The collation control device 12 receives the collation result confirmation request from the power control device 13 when the user performs a start operation of the engine E, for example, and transmits the ID code collation result to the power control device 13. To do. Further, the collation control device 12 gives a start permission signal Sp for permitting the start of the engine E at a predetermined timing when the user performs a start operation of the engine E in a state where the collation of the ID code is established. The data is transmitted to the engine control device 15 through the bus B.

  Further, when the collation control device 12 detects that the engine E has been started through the power supply control device 13 in the state where the above-described vehicle interior collation is established, the collation control device 12 releases the mechanical locking state of the steering wheel. A steering lock unlock command signal is transmitted to the steering lock control device 14 via the bus B. In response to the steering lock unlock command signal, the steering lock control device 14 drives and controls the steering lock motor 14a to unlock the locked steering lock device.

  The collation control device 12 also confirms that the parking preparation operation by the user has been performed, that is, the engine E being started is stopped and the vehicle is turned off and the door is opened and closed. 13 through recognition. When the parking control operation 12 is detected, when the ON signal from the door lock switch 25 is input, the verification control device 12 uses the vehicle interior transmitter 21 and the vehicle interior transmitter 22 for vehicle exterior verification and vehicle interior verification. A response request signal Sreq is transmitted to form an out-of-vehicle communication area and an in-vehicle communication area. Thereafter, the collation control device 12 collates the ID code of the electronic key K received through the receiver 23. Then, the collation control device 12 transmits a lock request signal for requesting locking of the door to the power supply control device 13 when it is confirmed that the vehicle exterior verification is established and the vehicle interior verification is not established. On the other hand, the collation control device 12 transmits a lock request signal, assuming that the electronic key K is misplaced in the vehicle interior, when the vehicle exterior verification is not established and the vehicle interior verification is established. And the buzzer (alarm function) 28 is activated.

  Moreover, the collation control apparatus 12 switches the operation | movement aspect of the vehicle 10 from a no-warning state to a warning state, as FIG. 2 shows, when the vehicle 10 will be in a parking state as a predetermined warning start condition. Examples of the warning start condition include the following (a) to (c). When it is detected that all of (a) to (c) are established, the collation control device 12 determines that the user has left the vehicle 10 and has entered the parking state.

(A) The electronic key K is not in the passenger compartment.
(B) All doors are closed and locked.
(C) The hood and luggage hood are closed.

  Then, as shown in FIG. 2, when the vehicle 10 is kept in the above-described alert state (that is, during parking), the vehicle 10 is in a specific vehicle state that is assumed in advance to be likely to be stolen. When the crime prevention operation start condition is detected, the verification control device 12 performs a crime prevention operation that is determined to be a vehicle theft. In the present embodiment, a traveling preparation operation performed when the vehicle 10 is traveling is assumed as the specific vehicle state (security operation start condition). Examples of the travel preparation operation include the following (d) to (f).

(D) The shift position is switched from the parking position to another position.
(E) The release of the parking brake is detected.

(F) The power-on of the vehicle 10 is detected.
(G) The power-on is detected in a state where the electronic key K is not inserted into the key slot 26.

  The verification control device 12 assumes that an illegal travel preparation operation is performed on the vehicle 10 when at least one of (d) to (g) is detected when the vehicle 10 is kept in a warning state. Perform the specified crime prevention action. As this crime prevention operation, for example, there are the following (h) and (i). In this embodiment, (h) is adopted.

(H) Prohibit starting of engine E.
(I) Prohibiting the unlocking operation of the steering lock device.
Here, as a method of prohibiting the start of the engine E, for example, there are the following (h-1), (h-2), and (h-3), and (h-1) is adopted in the present embodiment. Has been.

(H-1) Prohibiting fuel injection control by the engine control device.
(H-2) Prohibiting the closing operation of the power supply relay circuit for opening and closing the power supply of the vehicle.
(H-3) Prohibiting the output of a start request signal Seg for requesting start of the engine E from the power supply control device 13 to the engine control device 15 described later.

  Note that the above-described crime prevention operations (h) and (i) can be appropriately combined. Further, the collation control device 12 can perform a predetermined alarm operation when the specific vehicle states (d) to (g) are detected. Examples of the alarm operation include horn sound and blinking of a hazard lamp. In this case, the specific vehicle state shown in (d) to (g) is an alarm start condition for starting the alarm operation.

  Further, the collation control device 12 cancels the crime prevention state of the vehicle 10 when a predetermined crime prevention operation release condition is detected in the crime prevention state of the vehicle 10. As the security operation release condition, for example, there are the following (j) to (l), and (j) and (k) are adopted in the present embodiment.

(J) A predetermined release time (for example, 5 minutes) has elapsed since the operation mode of the vehicle 10 was switched to the crime prevention state.
(K) The vehicle operation by the regular electronic key K is detected.

(L) Confirmation that the user is a legitimate user.
The release time of the crime prevention operation release condition (j) is measured by a timer 12a provided in the verification control device 12. Further, when the crime prevention operation cancellation condition (l) is adopted, as shown in FIG. 1, for example, an input device 29 for inputting a password for user authentication is provided in the passenger compartment. When a security code is input through the input device 29 during the security operation of the vehicle 10, the verification control device 12 determines the validity of the security code, and when it is determined that the security code is valid, the security control of the vehicle 10 is performed. Cancel the operation.

<Power control device>
On the other hand, an engine switch 31 and a power relay circuit 32 are connected to the power controller 13.

  The engine switch 31 is a push switch that is pressed to switch the power supply position of the vehicle 10 when the on-vehicle accessory and the engine E are operated. When the engine switch 31 is pressed, it outputs an operation signal indicating that to the power supply control device 13. The power relay circuit 32 includes an accessory relay 32a and an ignition relay 32b. When the accessory relay 32a and the ignition relay 32b are turned on, electric power from an in-vehicle battery (not shown) is supplied to an accessory circuit (not shown) and a starting auxiliary circuit (not shown) of the engine E.

In addition, a door courtesy switch 33, a door lock motor 34, and a door lock position switch 35 are connected to the power supply control device 13.
The door courtesy switch 33 detects the door open / close state of the vehicle 10 and outputs a door open / close signal to the power supply control device 13. The door lock motor 34 operates to lock and unlock the door according to a lock signal (lock current) and an unlock signal (unlock current) output from the power supply control device 13. The door lock position switch 35 detects the locking / unlocking state of the door and outputs a locking / unlocking state signal to the power supply control device 13.

Further, a parking brake switch 36, a stop lamp switch 37 and a shift position sensor 38 are connected to the power supply control device 13.
The parking brake switch 36 detects the operation of the parking brake and outputs an operation signal to the power supply control device 13. The power supply control device 13 determines that the parking brake is operating when the operation signal is input, and determines that the parking brake is released when the operation signal is not input.

  The stop lamp switch 37 detects a depression operation of a brake pedal (not shown) and outputs a brake pedal on signal to the power supply control device 13. The power supply control device 13 determines that the brake pedal is depressed when the brake pedal on signal is input, and determines that the brake pedal is not depressed when the brake pedal on signal is not input.

  The shift position sensor 38 detects that a shift position that is an operation position of a shift lever (not shown) is held at a parking position “P” that is a parking position, and outputs a parking position signal to the power supply control device 13. When the parking position signal is input, the power control device 13 determines that the shift lever is held at the parking position, and when the parking position signal is not input, the shift lever is at a position other than the parking position (for example, the drive position). ).

  When it is detected that the shift lever is held at the parking position and the brake pedal is depressed, the power control device 13 receives the engine E when the operation signal from the engine switch 31 is input. A start request signal Seg for requesting start of the engine is output to the engine control device 15 through the bus B.

  Further, the power supply control device 13 is in the case where the shift lever is held at the parking position, and every time an operation signal from the engine switch 31 is inputted when it is not detected that the brake pedal is depressed. Then, the power position of the vehicle 10 is switched in the order of off position → accessory position → ignition on position → off position. That is, the power supply control device 13 turns off both the accessory relay 32a and the ignition relay 32b when the power supply position of the vehicle 10 is turned off, and turns the accessory relay 32a on when switching to the accessory position. When switching to the ignition on position, the ignition relay 32b is further turned on.

  When the power supply control device 13 receives the unlock request signal from the verification control device 12, the power control device 13 drives the door lock motor 34 to unlock all doors and receives the lock request signal from the verification control device 12. Then, the door lock motor 34 is driven and locked by interlocking with all doors. The power supply control device 13 recognizes that the door is unlocked when the door lock position switch 35 changes from the off state to the on state, that is, when the unlock state signal is input from the door lock position switch 35. . Further, the power supply control device 13 recognizes that the door is in the locked state when the door lock position switch 35 is switched from the on state to the off state, that is, when the lock state signal is input from the door lock position switch 35. .

  In the present embodiment, the collation control device 12, the power supply control device 13, the steering lock control device 14, and the engine control device 15 constitute the control means of the present invention. The verification control device 12 constitutes the locking / unlocking control means of the present invention, and the power supply control device 13 constitutes the power supply monitoring means of the present invention. Furthermore, the power supply control device 13, the key slot 26, the parking brake switch 36, and the shift position sensor 38 constitute vehicle state detection means and travel preparation operation detection means of the present invention. The engine E constitutes a power source for the vehicle.

<Operation at engine start>
Next, the operation of the vehicle 10 when starting the engine E will be described.
When the user who possesses the electronic key K opens the door and gets into the vehicle 10, the verification control device 12 determines the validity of the electronic key K through mutual wireless communication with the electronic key K. When it is determined that there is an electronic key K, the determination result is temporarily stored assuming that the electronic key K exists in the passenger compartment. When the power control device 13 detects that the shift lever is held at the parking position and detects the depression of the brake pedal and the pressing operation of the engine switch 31, the user enters the vehicle interior. The verification result of the validity of the electronic key K performed when boarding is confirmed with respect to the collation control device 12. Then, the verification control device 12 responds to the power supply control device 13 with the determination result of the validity of the electronic key K.

  When the determination result of the validity of the electronic key K acquired through the verification control device 12 is a determination result indicating that it is appropriate, the power supply control device 13 turns on the accessory relay 32a and the ignition relay 32b. Thereby, operating power is supplied to or can be supplied to each part of the vehicle 10.

  When the verification control device 12 recognizes that the vehicle 10 is turned on through the power control device 13, it transmits a steering lock unlock command signal to the power control device 13 and the steering lock control device 14 in order to unlock the steering lock device. . The power supply control device 13 receives the steering lock unlock command signal from the verification control device 12 and supplies power to the steering lock motor 14a. The steering lock control device 14 receives the steering lock unlock command signal from the verification control device 12, recognizes the supply of power to the steering lock motor 14a, and drives the steering lock motor 14a to unlock the steering lock device. . As a result, the steering wheel can be operated. The steering lock control device 14 transmits an unlocking completion signal indicating that unlocking of the steering lock device is completed to the verification control device 12 and the power supply control device 13.

  When the unlocking completion signal is input from the steering lock control device 14, the power supply control device 13 transmits a start request signal Seg requesting the start of the engine E to the engine control device 15 through the bus B. Further, when it is determined that the electronic key K is appropriate, the collation control device 12 transmits a start permission signal Sp for permitting the start of the engine E to the engine control device 15 through the bus B at this timing. The verification control device 12 may transmit the start permission signal Sp to the engine control device 15 before the start request signal Seg is output from the power supply control device 13.

  The engine control device 15 drives a starter motor (not shown) or performs fuel injection control when both the start request signal Seg from the power supply control device 13 and the start permission signal Sp from the verification control device 12 are input. Or start the engine E. The engine control device 15 determines that the engine E has completely started operation when the rotational speed of the engine E becomes equal to or higher than the set value, and outputs a complete explosion detection signal indicating that to the power supply control device 13. The power supply control device 13 receives the complete explosion detection signal from the engine control device 15 and stops outputting the start request signal Seg. Thus, the starting operation of the engine E is completed.

  As described above, the electronic key K normally operates using a built-in battery (not shown) as an operating power source, and is provided with a transponder Ka in preparation for when the battery is consumed. When the battery is exhausted, the electronic key K is attached to the key slot 26 provided near the driver's seat. The insertion of the electronic key K into the key slot 26 is detected by the insertion detection switch 27a, and the insertion detection switch 27a outputs an insertion detection signal of the electronic key K to the verification control device 12. When the insertion detection signal from the insertion detection switch 27a is input, the verification control device 12 transmits a driving radio wave (electromagnetic field) through the antenna coil 27b. The transponder Ka of the electronic key K is activated by using the driving radio wave emitted from the antenna coil 27b as an operating power source, and transmits a unique ID code to itself. When the verification control device 12 receives the ID code issued from the transponder Ka through the antenna coil 27b, the verification control device 12 determines the validity of the ID code, and if it determines that the ID code is valid, the electronic key K is assumed to exist in the passenger compartment. The determination result is temporarily stored. After that, when the power control device 13 detects that the shift lever is held at the parking position and detects the depression of the brake pedal and the pressing operation of the engine switch 31, the same as described above. The engine E is controlled to start. The same operation as described above is performed when the electronic key K is inserted into the key slot 26 when the battery of the electronic key K is not exhausted.

<When the engine is stopped>
Next, the operation of the vehicle 10 when the engine E is stopped and the vehicle gets off will be described.
When the vehicle is stopped and the shift lever is put into the parking position and the engine switch 31 is pressed, the power supply control device 13 indicates that these operations have been performed, the operation signal from the engine switch 31 and the parking from the shift position sensor 38. Recognizes when a position signal is input. Then, the power supply control device 13 opens the ignition relay 32b and the accessory relay 32a to turn off the vehicle 10.

  When the collation control device 12 recognizes that the power of the vehicle 10 is off through the power control device 13 and detects that the door is opened through the door courtesy switch 33, the collation control device 12 controls the steering lock device to lock the steering lock device. A lock locking command signal is transmitted to the power supply control device 13 and the steering lock control device 14. The power control device 13 receives the steering lock locking command signal from the verification control device 12 and supplies power to the steering lock motor 14a. The steering lock control device 14 receives the steering lock locking command signal from the verification control device 12, recognizes the supply of power to the steering lock motor 14a, and drives the steering lock motor 14a to lock the steering lock device. Thereby, the operation of the steering wheel is mechanically restricted. The steering lock control device 14 transmits a lock completion signal indicating that the lock of the steering lock device is completed to the verification control device 12 and the power supply control device 13.

  Thereafter, the collation control device 12 transmits a lock request signal for requesting locking of the door to the power supply control device 13 when it is confirmed that the vehicle interior collation is established and the vehicle interior collation is not established. In response to the lock request signal from the verification control device 12, the power control device 13 drives and controls the door lock motor 34 to lock the door.

  As a result, the vehicle 10 has the above-described warning start condition, that is, (a) the electronic key K is not in the passenger compartment, (b) all doors are closed and locked, and (c) the hood and luggage are closed. It will be in a parking state that meets all that. And the collation control apparatus 12 switches the operation | movement aspect of the vehicle 10 from a no-warning state to a warning state. The collation control device 12 recognizes the open / closed states of the hood and the luggage hood through a hood hood switch and a luggage hood switch (not shown). When the vehicle 10 is in a warning state, the verification control device 12 performs a predetermined crime prevention operation when detecting a specific vehicle state preliminarily assumed that the vehicle 10 may be stolen. This crime prevention operation will be described in detail later.

<Security operation>
Next, the crime prevention operation by the vehicle antitheft system 11 will be described in detail.
When the vehicle 10 is parked and kept in the above-mentioned alert state, a specific vehicle state (crime prevention operation start condition) presumed that the vehicle 10 may be stolen is detected. The control device 12 performs a crime prevention operation that is determined to be a risk of vehicle theft.

  That is, the collation control device 12 is illegal with respect to the vehicle 10 when any one of the above-described (d) to (g) is detected as a preparatory operation performed when the vehicle 10 travels in the alert state. Assuming that a proper traveling preparation operation is being performed, the engine E operates to prohibit starting. Specifically, as shown in FIG. 3A, the collation control device 12 transmits a start inhibition signal Sf for inhibiting the start of the engine E to the engine control device 15 through the bus B. In response to the start prohibition signal Sf from the verification control device 12, the engine control device 15 does not perform engine control such as fuel injection control. Since the engine E does not start, the vehicle 10 is unable to travel.

(D) The shift position is switched from the parking position to another position.
(E) The release of the parking brake is detected.

(F) The power-on of the vehicle 10 is detected.
(G) The power-on is detected in a state where the electronic key K is not inserted into the key slot 26.

  The shift position switching operation is detected by the shift position sensor 38, and the detection result is input to the verification control device 12 through the power supply control device 13. The parking brake release operation is detected by the parking brake switch 36, and the detection result is input to the verification control device 12 through the power supply control device 13. Whether or not the vehicle 10 is powered on is recognized by the power supply control device 13, and the recognized power supply information is transmitted to the verification control device 12 through the bus B. Whether or not the electronic key K is inserted into the key slot 26 is detected by the insertion detection switch 27 a, and the detection result is input to the verification control device 12.

  As described above, when the vehicle 10 is parked in the alert state and the illegal traveling preparation operation shown in (d) to (g) described above is detected, the start of the engine E is prohibited and the vehicle 10 Becomes unable to run. For this reason, it is effective for replacement of various control devices constituting the vehicle anti-theft system 11 which is a concern in recent years, and for theft by decoding the ID code of the electronic key K. That is, unlike the conventional anti-theft system that only prohibits starting the engine E when the ID code of the electronic key K cannot be read on the vehicle side or the ID code does not match, Even if the device is replaced or the ID code of the electronic key K is decoded, the vehicle 10 cannot travel. Therefore, it is not necessary to judge the validity of the electronic key K, and when the illegal driving preparation operation is detected, the engine E is immediately prohibited from starting, thereby further enhancing the anti-theft performance of the vehicle 10. It is done.

  As described above, instead of prohibiting the start of the engine E as the crime prevention operation, “(i): prohibiting the unlocking operation of the steering lock device” is also possible. In this case, as shown in FIG. 3B, the collation control device 12 buses the unlocking prohibition signal Slf to the power control device 13 and the steering lock control device 14 in order to prohibit the unlocking operation of the steering lock device. Send through B. When the unlocking inhibition signal Slf is input from the verification control device 12, the power supply control device 13 does not supply power to the steering lock motor 14a. Similarly, the steering lock control device 14 does not perform drive control of the steering lock motor 14a. Since the operation of the steering wheel is restricted, the vehicle 10 is unable to travel.

  As described above, “(h-2): prohibiting the closing operation of the power supply relay circuit 32 for opening and closing the power supply of the vehicle 10” is also possible as a technique for prohibiting the start of the engine E. In this case, as shown in FIG. 3C, the collation control device 12 sends a relay closing operation inhibition signal Sr to prohibit the closing operation of the accessory relay 32a and the ignition relay 32b that constitute the power supply relay circuit 32. Output to the power supply control device 13. When the relay closing operation inhibition signal Sr is input from the verification control device 12, the power supply control device 13 does not turn on the accessory relay 32a and the ignition relay 32b. Since power is not supplied to each part of the vehicle 10 including the start assist circuit of the engine E, the starter motor constituting the start assist circuit is not driven. Since the engine E does not start, the vehicle 10 is unable to travel.

  Further, “(h-3): prohibiting the output of the start request signal Seg from the power supply control device 13” is also possible as a technique for prohibiting the start of the engine E. In this case, as shown in FIG. 3 (d), the collation control device 12 transmits a start request output inhibition signal Segf to the power supply control device 13 in order to inhibit the output of the start request signal Seg. The engine control device 15 performs the start control of the engine E only when both the start permission signal Sp from the verification control device 12 and the start request signal Seg from the power control device 13 are input. Since the start request signal Seg is not transmitted to the control device 15, the engine control device 15 does not perform the start control of the engine E. Since the engine E does not start, the vehicle 10 is unable to travel.

  And any of the configurations shown in (i) described above as the crime prevention operation and (h-2) and (h-3) described above as the method for prohibiting the start of the engine E, illegal preparation for traveling is adopted. Since the traveling of the vehicle 10 becomes impossible when the operation is detected, the anti-theft performance of the vehicle 10 can be further enhanced.

  In addition, when the above-described unauthorized traveling preparation operations (d) to (g) are detected in the alert state, the verification control device 12 is configured to perform the predetermined alarm operation. When an illegal traveling preparation operation shown in (d) to (g) is detected, an operation command signal is output to the buzzer 28, the horn, and the hazard lamp in order to perform a predetermined alarm operation. As a result, the buzzer 28 and the horn sound, and the hazard lamp blinks.

  When the above-described crime prevention operation release conditions (j) to (l) are detected in the state where the crime prevention operation is performed as described above, the collation control device 12 outputs prohibition commands to various control devices. The crime prevention state of the vehicle 10 is canceled by stopping the operation. As a result, the vehicle 10 returns to the alert state. When an alarm operation is performed when an illegal traveling preparation operation is detected, this alarm operation is also stopped.

(J) A predetermined release time has elapsed since the operation mode of the vehicle 10 was switched to the crime prevention state.
(K) The vehicle operation by the regular electronic key K is detected.

(L) Confirmation that the user is a legitimate user.
By setting (l) as the crime prevention action release condition, even if an illegal travel preparation operation is erroneously detected for some reason, the crime prevention action is automatically released after a predetermined release time has elapsed, and the alert state Return to. For this reason, the crime prevention operation of the vehicle 10 is not continued by mistake, and there is no big problem in terms of convenience for the user. Further, by adopting the above (m) as the condition for canceling the crime prevention operation, even if the vehicle 10 is in the crime prevention operation state, the crime prevention operation is canceled when the unlocking operation or the like with the regular electronic key K is performed. Is done. For this reason, user convenience is ensured. Further, when the above (n) is adopted as the crime prevention operation cancellation condition, the identity is confirmed by, for example, a password entered through the input device 29 provided in the passenger compartment. For this reason, it becomes possible to reliably prevent the release of the crime prevention operation by a third party.

<Effect of Embodiment>
Therefore, according to the present embodiment, the following effects can be obtained.
(1) The traveling preparation operation of the vehicle 10 is set as a specific vehicle state in the parked vehicle 10 that may be stolen. When the vehicle theft prevention system 11 monitors the state of the parked vehicle 10 and detects an illegal travel preparation operation of the vehicle 10, the vehicle anti-theft operation is prohibited by prohibiting the start of the engine E as a crime prevention operation. To. That is, when the specific vehicle state is detected during parking, the validity of the electronic key K is not judged in the passenger compartment, and the start of the engine E is immediately prohibited and the vehicle 10 cannot travel. It becomes. Therefore, the antitheft performance of the vehicle 10 can be further strengthened.

  Moreover, since the start of the engine E is prohibited, the traveling of the vehicle 10 can be reliably prevented. Even when the unlocking operation of the steering lock device that mechanically locks the operation of the steering wheel is prohibited when a predetermined abnormal state is detected during parking, the vehicle 10 can normally travel. The same effect as when engine E is prohibited from starting is obtained.

  (2) The traveling preparation operation of the vehicle 10 is assumed as a specific vehicle state in the parked vehicle 10 that may be stolen. Specifically, when the above (d) to (g) are detected during parking, the start of the engine E is prohibited.

  When the traveling preparation operation of the vehicle 10 as shown in (d) to (g) is detected during parking, it can be said that the risk of theft of the vehicle 10 is extremely high. In the present embodiment, the shift position sensor 38, the parking brake switch 36, and the power supply control device 13 are set as the travel preparation operation detecting means for detecting these travel preparation operations, and when an illegal travel preparation operation is detected by these, Starting of the engine E is prohibited. For this reason, the anti-theft performance of the vehicle 10 is suitably enhanced.

  (3) The start prohibition state of the engine E is canceled when a predetermined release time has elapsed since the start of the engine E is prohibited to make the vehicle 10 unable to travel. For this reason, even if the travel preparation operation of the parked vehicle 10 is erroneously detected for some reason and the vehicle 10 becomes unable to travel, the vehicle 10 is considered to be ready for traveling if a predetermined release time elapses. Become. Therefore, there is no problem for the user in terms of convenience.

  (4) Needless to say, the validity of the electronic key K is determined, and when an unauthorized traveling preparation operation is detected, the start of the engine E is immediately prohibited. For this reason, unlike the conventional anti-theft system which only prohibits starting the engine when the ID code of the electronic key cannot be read on the vehicle side or the ID code does not match, the crime prevention operation is performed at an early stage. As a result, the anti-theft performance of the vehicle 10 can be further enhanced.

<Second Embodiment: Intrusion Detection: State of Door Glass>
Next, a second embodiment of the present invention will be described. In the present embodiment, when the vehicle is kept in the above-mentioned alert state, the first embodiment is different in that it is assumed that the vehicle is invaded as a specific vehicle state in which the vehicle may be stolen. Unlike the embodiment, the configuration is basically the same as that of the first embodiment. Therefore, the same reference numerals are given to the same members as those in the first embodiment, and the detailed description thereof is omitted.

  Similar to the first embodiment, when the vehicle 10 is kept in the above-mentioned alert state (that is, during parking), a specific vehicle state (assumed beforehand) that the vehicle 10 may be stolen ( When the crime prevention operation start condition) is detected, the verification control device 12 performs a crime prevention operation that is determined to be a vehicle theft. In the present embodiment, it is assumed that a third person enters the vehicle interior as the specific vehicle state. For example, the following (m) to (o) are set as the crime prevention operation start conditions to detect a situation that is estimated to be intrusion into the vehicle compartment.

(M) The door glass has changed from a fully closed state to an open state.
(N) The position of the door glass has been displaced to a position where a person can be invaded in advance.
(O) A crack in the door glass was detected.

  The present embodiment is based on the premise that a power window device that automatically raises and lowers the door glass through the operation of a door glass switch provided in the passenger compartment is mounted. That is, as shown in FIG. 4, the vehicle anti-theft system 11 is connected to the above-described verification control device 12, power supply control device 13, steering lock control device 14, and engine control device 15 through the bus B. A window control device 41 is provided. The power window control device 41 includes a power window motor 42 that opens and closes the door glass of the vehicle 10, a pulse sensor 43 that detects the rotation of the power window motor 42 and outputs a pulse signal Spl synchronized with the rotation, and A glass breakage detection sensor 44 that detects the presence or absence of cracks in the door glass is connected.

  Based on the pulse signal Spl output from the pulse sensor 43, the power window control device 41 accurately detects the displacement amount (position) and the displacement direction of the door glass by counting the pulses of the pulse signal Spl. Further, the power window control device 41 detects the rotational speed of the power window motor 42 based on the pulse signal Spl, and detects that the door glass has reached the fully closed position and the fully open position based on the rotational speed.

  That is, the change of the door glass in the crime prevention operation start condition (m) from the fully closed state to the open state is detected by the power window control device 41 through the pulse sensor 43, and the detection result is sent to the verification control device 12 by the bus B. Sent through. The fact that the position of the door glass in the crime prevention operation start condition (n) has been displaced to a position (for example, an opening amount ½) that allows a person to enter in advance is determined by the power window control device 41 through the pulse sensor 43. The detection result is transmitted to the verification control device 12 through the bus B. Whether or not the door glass breaks under the crime prevention operation start condition (o) is detected by the power window control device 41 through the glass break detection sensor 44, and the detection result is transmitted to the verification control device 12 through the bus B.

  Then, when the vehicle 10 is kept in a warning state, the verification control device 12 detects that any one of the above-described crime prevention operation start conditions (m) to (o) is detected. The start of the engine E is prohibited because there is a fear. When the door glass state as shown in the above (m) to (o) is detected during parking, it can be said that the risk of theft of the vehicle 10 is extremely high. When the state is detected, the start of the engine E is prohibited immediately, so that the antitheft performance of the vehicle 10 can be enhanced. Further, by detecting an abnormality based on the state of the door glass, it is possible to prohibit the traveling of the vehicle 10 before a third party enters the vehicle interior. For this reason, the anti-theft performance of the vehicle 10 can be further strengthened.

  When any one of the above-described crime prevention operation release conditions (j) to (l) is detected in the state where the crime prevention operation is performed, the verification control device 12 outputs a prohibition command to various control devices. The crime prevention state of the vehicle 10 is canceled by, for example, stopping. As a result, the vehicle 10 returns to the alert state. In addition, although the vehicle 10 of this Embodiment is provided with all the structures shown by FIG. 1, in FIG. 4, only a part of structure is shown for convenience of explanation. Further, the power window control device 41, the pulse sensor 43, and the glass breakage detection sensor 44 constitute vehicle state detection means, intrusion detection means, and door glass state detection means of the present invention.

Therefore, according to this embodiment, the same effects as (1) to (4) of the first embodiment can be obtained.
<Third embodiment: Intrusion detection: Detecting an intruder itself>
Next, a third embodiment of the present invention will be described. In the present embodiment, when the vehicle is kept in the above-mentioned alert state, the first embodiment is implemented in that the vehicle interior is assumed as a specific vehicle state that may cause the vehicle to be stolen. Unlike the embodiment, the configuration is basically the same as that of the first embodiment. Therefore, the same reference numerals are given to the same members as those in the first embodiment, and the detailed description thereof is omitted.

  Similar to the first embodiment, when the vehicle 10 is kept in the above-described alert state, a specific vehicle state (crime prevention operation start condition) preliminarily assumed to be a possibility of the vehicle 10 being stolen is obtained. When detected, the collation control device 12 performs a crime prevention operation that is determined to be a possibility of vehicle theft. In the present embodiment, as the specific vehicle state, an intrusion into the vehicle interior itself is assumed. For example, the following (p) and (q) are set as the crime prevention operation start conditions for detecting an intruder into the vehicle interior.

(P) Seating on the seat has been detected.
(Q) The presence of a person is detected in the passenger compartment.
As shown in FIG. 5, a sheet switch 51, a camera 52, and a human sensor 53 are connected to the power supply control device 13. The seat switch 51 is provided on a seat cushion in the passenger compartment, detects the presence or absence of seating on the seat, and outputs a detection signal (on signal or off signal) to the power supply control device 13. For example, a CCD camera or a CMOS camera can be used as the camera 52. The camera 52 captures the interior of the vehicle and outputs the captured image information to the power supply control device 13. The human sensor 53 detects the presence of a person in the passenger compartment and outputs a detection signal to the power supply control device 13.

  When the ON signal from the seat switch 51 is input, the power supply control device 13 transmits an intrusion detection signal to the verification control device 12 via the bus B, assuming that seating on the seat is detected. Further, the power supply control device 13 determines the presence or absence of a person in the passenger compartment based on the image information from the camera 52, and transmits an intrusion detection signal to the verification control device 12 via the bus B when it is determined that a person is present. . Further, when the detection signal from the human sensor 53 is input, the power supply control device 13 transmits an intrusion detection signal to the verification control device 12 on the assumption that the presence of a person is detected in the passenger compartment. That is, the crime prevention operation start condition (p) is detected by the seat switch 51, and the crime prevention operation start condition (q) is detected by the camera 52 and the human sensor 53.

  Then, when the vehicle 10 is kept in a warning state, the verification control device 12 has entered the vehicle interior when any of the above-described crime prevention operation start conditions (p), (q) is detected. The engine E is prohibited from starting. When it is detected that there is an intruder into the vehicle interior as shown in (p) and (q) during parking, it can be said that the risk of theft of the vehicle 10 is extremely high. When the presence of the intruder is detected, the start of the engine E is immediately prohibited, thereby enhancing the antitheft performance of the vehicle 10. Also, by detecting the presence or absence of seating in the seat or the presence of a person in the passenger compartment and performing a security operation, for example, if seating in the seat is not detected for some reason, Is detected as an abnormal state. For this reason, the presence of an intruder can be detected more reliably.

  When any one of the above-described crime prevention operation release conditions (j) to (l) is detected in the state where the crime prevention operation is performed, the verification control device 12 outputs a prohibition command to various control devices. The crime prevention state of the vehicle 10 is canceled by, for example, stopping. As a result, the vehicle 10 returns to the alert state. In addition, although the vehicle 10 of this Embodiment is provided with all the structures shown by FIG. 1, in FIG. 5, only a part of structure is shown for convenience of explanation. Further, the seat switch 51, the camera 52, and the human sensor 53 constitute the vehicle state detection means of the present invention. In the present embodiment, one of the camera 52 and the human sensor 53 can be omitted.

Therefore, according to the present embodiment, the same effects as (1) to (4) of the first embodiment can be obtained.
<Fourth embodiment: intrusion detection: detection of unauthorized door opening>
Next, a fourth embodiment of the present invention will be described with reference to FIG. The present embodiment is different from the first embodiment in that it is assumed that the vehicle enters the vehicle interior as the specific vehicle state when the vehicle is kept in the above-described alert state. The configuration is the same as that of the first embodiment. Therefore, the same reference numerals are given to the same members as those in the first embodiment, and the detailed description thereof is omitted.

  Similar to the first embodiment, when the vehicle 10 is kept in the above-described alert state, a specific vehicle state (crime prevention operation start condition) preliminarily assumed to be a possibility of the vehicle 10 being stolen is obtained. When detected, the collation control device 12 performs a crime prevention operation that is determined to be a possibility of vehicle theft. In the present embodiment, it is assumed that a third person enters the vehicle interior as the specific vehicle state. For example, the following (r) is set as a crime prevention operation start condition in order to detect a situation that is estimated to be intrusion into the vehicle interior.

(R) The door opening operation is detected in a state where the use of the regular electronic key K is not confirmed.
As described above, when entering the vehicle 10 in the locked state, the validity of the electronic key K is determined through wireless communication with the electronic key K on the vehicle side. Unlocking is permitted. Therefore, when the door opening operation is detected by the door courtesy switch 33 even though the door unlocking is not permitted, there is a high probability that an unauthorized door opening operation has been performed. The door opening / closing signal from the door courtesy switch 33 is transmitted to the verification control device 12 through the power supply control device 13.

  Then, when the vehicle 10 is kept in a warning state, the verification control device 12 starts the engine E because there is a risk of entering the vehicle compartment when the crime prevention operation start condition (r) described above is detected. Is prohibited. If an illegal door opening operation as shown in (r) is detected during parking, it can be said that the risk of the vehicle 10 being stolen is extremely high. When the operation is detected, the start of the engine E is prohibited immediately, thereby enhancing the anti-theft performance of the vehicle 10.

  When any one of the above-described crime prevention operation release conditions (j) to (l) is detected in the state where the crime prevention operation is performed, the verification control device 12 outputs a prohibition command to various control devices. The crime prevention state of the vehicle 10 is canceled by, for example, stopping. As a result, the vehicle 10 returns to the alert state. In the present embodiment, “the door has changed from the locked state to the unlocked state in a state where the use of the regular electronic key K has not been confirmed” can be set as the crime prevention operation start condition. In the present embodiment, the door courtesy switch 33 constitutes the vehicle state detecting means of the present invention.

Therefore, according to the present embodiment, the same effects as (1) to (4) of the first embodiment can be obtained.
<Fifth embodiment: detecting fraud>
Next, a fifth embodiment of the present invention will be described. In the present embodiment, when the vehicle is maintained in the above-mentioned alert state, the first embodiment is implemented in that an illegal act on the vehicle is assumed as a specific vehicle state in which the vehicle may be stolen. Unlike the embodiment, the configuration is basically the same as that of the first embodiment. Therefore, the same reference numerals are given to the same members as those in the first embodiment, and the detailed description thereof is omitted.

  Similar to the first embodiment, when the vehicle 10 is kept in the above-described alert state, a specific vehicle state (crime prevention operation start condition) preliminarily assumed to be a possibility of the vehicle 10 being stolen is obtained. When detected, the collation control device 12 performs a crime prevention operation that is determined to be a possibility of vehicle theft. In the present embodiment, an illegal act on the vehicle 10 is assumed as the specific vehicle state. For example, the following (s) and (t) are set as the crime prevention operation start conditions to detect the fraud.

(S) The hood hood has changed from the closed state to the open state.
(T) Removal of the battery or disconnection of the power supply line (power supply line) is detected.
As shown in FIG. 6, a hood switch 61 and a power disconnection sensor 62 are connected to the power control device 13. The hood switch 61 detects an open / closed state of a hood hood (not shown) and outputs a detection signal to the power supply control device 13. The power disconnection sensor 62 detects the disconnection of the power based on the presence or absence of the voltage or current generated in the power supply line, that is, the presence or absence of the removal of the battery or the disconnection of the power supply line, and outputs the detection signal to the power supply control device 13.

  When the detection signal indicating that the hood switch 61 is in the open state is input, the power supply control device 13 transmits the fraud detection signal to the verification control device 12 assuming that the hood hood has been opened illegally. Further, when a detection signal indicating that the power supply is disconnected is input, the power supply control device 13 transmits a fraud detection signal to the verification control device 12 on the assumption that the battery is removed or the power supply line is disconnected. That is, the crime prevention operation start condition (s) is detected by the hood switch 61, and the crime prevention operation start condition (t) is detected by the power disconnection sensor 62.

  When the vehicle 10 is kept in a warning state, the verification control device 12 is illegal with respect to the vehicle 10 when any of the above-described crime prevention operation start conditions (s) and (t) is detected. It is prohibited to start the engine E because the action is being performed. Incidentally, the crime prevention operation start condition (s) assumes the removal of the battery. The crime prevention operation start condition (t) assumes a situation in which the battery is removed or the power line is disconnected without opening the hood. When it is detected that an illegal act as shown in (s) and (t) is being performed during parking, it can be said that the risk of theft of the vehicle 10 is extremely high. When an illegal act on the vehicle 10 is detected, the start of the engine E is immediately prohibited, thereby enhancing the antitheft performance of the vehicle 10.

  When any one of the above-described crime prevention operation release conditions (j) to (l) is detected in the state where the crime prevention operation is performed, the verification control device 12 outputs a prohibition command to various control devices. The crime prevention state of the vehicle 10 is canceled by, for example, stopping. As a result, the vehicle 10 returns to the alert state. In addition, although the vehicle 10 of this Embodiment is provided with all the structures shown by FIG. 1, in FIG. 6, only a part of structure is shown for convenience of explanation.

  In the present embodiment, it is also possible to set “the power supply connection is detected again after the power supply disconnection is detected once” as the crime prevention operation start condition. One of the hood switch 61 and the power disconnection sensor 62 can be omitted. Moreover, in this Embodiment, the hood switch 61 comprises the vehicle state detection means of this invention. Similarly, the power disconnection sensor 62 constitutes vehicle state detection means and power supply detection means of the present invention.

Therefore, according to the present embodiment, the same effects as (1) to (4) of the first embodiment can be obtained.
<Other embodiments>
Each of the above embodiments may be modified as follows.

  In the first to fifth embodiments, the door unlocking is permitted when the vehicle exterior verification is established at the time of boarding, and the operation of the door outside handle is detected by the touch sensor 24 in this state. The doors are sometimes unlocked, but the following may be used. That is, the door may be automatically unlocked when the vehicle exterior verification is established. In the first to fifth embodiments, the door is locked through the operation of the door lock switch 25 when the passenger gets off, but the door is automatically locked when the vehicle exterior verification is established. It may be. In this case, the touch sensor 24 and the door lock switch 25 can be omitted.

  In the first to fifth embodiments, the key slot 26 can be omitted. In this case, the antenna coil 27b is disposed in the vicinity of the engine switch 31, for example. Then, when the user who holds the electronic key K gets into the vehicle interior, for example, when depression of the brake pedal is detected, a driving radio wave for driving the transponder Ka is transmitted from the antenna coil 27b. Even in this case, the engine E can be started when the battery of the electronic key K is consumed.

  In the first to fifth embodiments, the door lock / unlock permission and the engine E start permission are performed based on the two-way communication between the electronic key K and the vehicle 10. The door may be locked and unlocked based on the one-way communication. In this case, the electronic key K is provided with a lock button and an unlock button. When these buttons are operated, a lock signal and an unlock signal including an ID code unique to the electronic key K are transmitted, and the door is locked and unlocked based on these signals. Also, a so-called transmitter key (remote control key) can be employed instead of the electronic key K that performs bidirectional communication with the vehicle 10. This transmitter key is a type of key that transmits a locking signal and an unlocking signal including a unique ID code through operation of the locking button and the unlocking button. On the vehicle side, the door is locked and unlocked based on the locking signal and the unlocking signal.

  The first to fifth embodiments can be appropriately combined. For example, as a specific vehicle state (crime-prevention operation start condition) preliminarily assumed that the vehicle may be stolen in a parked vehicle, the vehicle 10 is prepared for traveling, enters the vehicle compartment, and cheating on the vehicle 10. Are set so that the above-described crime prevention operation is performed when any of these is detected. In this way, the anti-theft performance of the vehicle 10 is further enhanced.

<Other technical ideas>
Next, the technical idea that can be grasped from the embodiment will be described below.
7. The vehicle anti-theft system according to claim 6, wherein the prohibition of starting of the engine is performed by closing the power relay circuit for opening and closing the power source of the vehicle and starting the engine with respect to the engine control device for performing engine start control. A vehicle theft prevention system which is performed by prohibiting at least one of an output of a start request signal for requesting fuel injection and fuel injection control by the engine control device. According to this configuration, engine start is preferably prohibited.

The block diagram which shows the structure of the vehicle antitheft system of 1st Embodiment. The transition diagram which similarly shows the transition of the operation | movement aspect of a vehicle. (A) is a block diagram which similarly shows the operation | movement at the time of an unauthorized driving | running | working preparation operation detection, (b)-(d) is a block diagram which shows the modification of the operation | movement at the same time when an unauthorized driving | operation preparation operation is detected. The block diagram which shows schematic structure of the vehicle antitheft system of 2nd Embodiment. The block diagram which shows schematic structure of the vehicle antitheft system of 3rd Embodiment. The block diagram which shows schematic structure of the vehicle antitheft system of 5th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Vehicle antitheft system, 12 ... Collation control apparatus, 13 ... Power supply control apparatus, 14 ... Steering lock control apparatus, 15 ... Engine control apparatus, 26 ... Key slot, 32 ... Power supply relay circuit, 36 ... Parking brake switch 38 ... Shift position sensor 33 ... Door courtesy switch 41 ... Power window control device 43 ... Pulse sensor 43, 44 ... Glass break detection sensor 51 ... Sheet switch 52 ... Camera 53 ... Human sensor 61 ... Hood switch, 62 ... Power disconnection sensor, E ... Engine, K ... Electronic key, Seg ... Start request signal.

Claims (12)

When the user who possesses the electronic key gets into the vehicle, if the validity of the electronic key is judged through wireless communication with the electronic key, A vehicle anti-theft system that permits starting, but prohibits starting the engine if it is determined to be invalid,
Vehicle state detection means for detecting a specific vehicle state preliminarily assumed to be stolen in a parked vehicle;
Control means for monitoring the state of the parked vehicle and controlling the vehicle to place the vehicle in an inoperable state because there is a risk of vehicle theft when the specific vehicle state is detected by the vehicle state detection means; A vehicle anti-theft system. In the vehicle antitheft system according to claim 1,
The vehicle state detection means is a vehicle theft prevention system which is a travel preparation operation detection means for detecting a travel preparation operation of a vehicle as the specific vehicle state. In the vehicle antitheft system according to claim 1,
The vehicle state detection means is a vehicle theft prevention system which is an intrusion detection means for detecting an intrusion into a vehicle compartment as the specific vehicle state. In the vehicle antitheft system according to claim 1,
The vehicle state detection means is a vehicle theft prevention system which is an unauthorized act detection means for detecting an unauthorized act on a vehicle as the specific vehicle state. In the vehicle antitheft system according to any one of claims 1 to 4,
The control means is a vehicle theft prevention system for controlling the vehicle so as to cancel the inoperable state of the vehicle when a predetermined release time has elapsed since the start of control of the vehicle so as to make the vehicle inoperable. . In the vehicle antitheft system according to any one of claims 1 to 5,
The said control means is a vehicle antitheft system which prohibits starting of the engine which is a motive power source of the said vehicle, when the said specific vehicle state is detected by the said vehicle state detection means. In the vehicle antitheft system according to any one of claims 1 to 6,
The control means is a vehicle theft prevention system that prohibits an unlocking operation of a steering lock device that mechanically locks an operation of a steering wheel when a specific vehicle state is detected by the vehicle state detection means. In the vehicle antitheft system according to claim 2,
The travel preparation operation detecting means includes a shift position sensor that detects an operation of the shift lever to a position other than the parking range, a parking brake switch that detects an operation of releasing the parking brake, and a power monitoring means that detects power-on of the vehicle. A vehicle anti-theft system that is at least one. In the vehicle antitheft system according to claim 3,
The intrusion detection means is a vehicle anti-theft system which is a door glass state detection means for detecting at least one of an open / closed state of a door glass of a vehicle and whether or not the door glass is broken. In the vehicle antitheft system according to claim 3,
The intrusion detection means is a vehicle theft prevention system that is one of a seat switch that detects the presence or absence of seating in a seat provided in the vehicle interior, a camera that images the vehicle interior, and a human sensor provided in the vehicle interior. . In the vehicle antitheft system according to claim 3,
The intrusion detection means includes a door switch that detects an open / closed state of a vehicle door,
When the user who possesses the electronic key gets into the vehicle, the control means judges the validity of the electronic key through wireless communication with the electronic key and determines that the electronic door is unlocked. Including a locking / unlocking control means for permitting or unlocking the lock, and when the detection signal indicating the door open state is input from the door switch in a state where the electronic key is determined to be invalid by the locking / unlocking control means. A vehicle theft prevention system that controls a vehicle so that the vehicle cannot travel. In the vehicle antitheft system according to claim 4,
The vehicle fraud prevention system, wherein the fraud detection means is at least one of a bonnet switch for detecting an open / closed state of a hood of a vehicle and a power supply detection means for detecting whether or not the power is cut off.

Images