JP4244798B2 - Vehicle anti-theft device - Google Patents

Description

  In the present invention, when the mechanical key inserted into the ignition key cylinder of the vehicle is a regular mechanical key of the vehicle, or the portable device for locking and unlocking the door of the vehicle carried by the vehicle occupant is provided in the vehicle. In the case of a legitimate portable device, the present invention belongs to a technical field relating to a vehicle antitheft device that can start an engine of the vehicle.

  Conventionally, as shown in Patent Document 1, for example, an immobilizer system for preventing theft of a vehicle is well known. In this system, a transmitter that transmits a key identification code to a mechanical key is built in, and when this mechanical key is inserted into an ignition key cylinder of a vehicle, the key identification code transmitted from the transmitter is the ignition key cylinder. The key identification code is transmitted to the engine control unit by being received by a nearby receiver. The engine control unit compares the received key identification code with a key identification code registered in advance in the storage device of the engine control unit, and when they match, the mechanical key is a genuine one for the vehicle. As a result, the engine can be started, so that the occupant can start the engine with the mechanical key.

In recent years, for example, as shown in Patent Document 2, a smart keyless entry system has been proposed in which a passenger can lock and unlock a door and start an engine without using a mechanical key. In this system, the portable device carried by the passenger incorporates a transmitter that periodically transmits a portable device identification code wirelessly, and the portable device identification code transmitted from the transmitter is received by the receiver, and the portable device identification code is transmitted to the portable device. The machine identification code is transmitted to the smart keyless entry control unit. The smart keyless entry control unit compares the received portable device identification code with a portable device identification code registered in advance in the storage device of the smart keyless entry control unit. The door of the vehicle is locked and unlocked according to the received electric field strength of the radio signal transmitted from the transmitter of the portable device. When an occupant carrying the portable device enters the passenger compartment, the engine of the vehicle is brought into a startable state, so that the occupant can start the engine keylessly by simply rotating the engine starting knob. become.
JP-A-10-86793 JP 2003-269019 A

  By the way, when adding the smart keyless entry system to the immobilizer system, it is simple and preferable not to change the configuration of the immobilizer system (particularly the engine control unit) as much as possible. In this case, a smart keyless entry control unit is provided in the intermediate part connecting the receiver that receives the key identification code transmitted from the transmitter of the mechanical key and the engine control unit. In addition to code verification, key identification code verification is also performed. That is, when the smart keyless entry control unit receives the key identification code transmitted from the mechanical key transmitter, it determines whether or not the mechanical key is genuine based on the key identification code, At the time of normal determination, which is a determination that the mechanical key is normal, key identification code reception control for transmitting the same key identification code as the normal mechanical key set for the vehicle to the engine control unit, and When the portable device identification code transmitted from the portable device identification code transmitter of the portable device is received, it is determined whether or not the portable device is genuine based on the portable device identification code, and the portable device At the time of normal determination, which is a determination that is normal, the same key identification code as the normal mechanical key is used. The to perform the portable device identification code receiving control to be sent to the engine control unit. In this way, the engine control unit always makes the vehicle engine ready to start because the received key identification code matches the key identification code registered in the storage device of the engine control unit. It will be.

  Alternatively, when the smart keyless entry control unit receives the key identification code, the key identification code reception control for transmitting the key identification code to the engine control unit and the portable device identification code when receiving the portable device identification code. When it is determined that the portable device is genuine, portable device identification code reception control for transmitting the same key identification code as the regular mechanical key to the engine control unit may be performed. .

  In the configuration where the smart keyless entry system is added to the immobilizer system as described above, for the convenience of the keyless, the occupant normally starts the engine without the key, and uses the mechanical key in the event of an emergency such as a failure of the portable device. Therefore, when both the key identification code and the portable device identification code are received, the portable device identification code reception control is preferably performed with priority over the key identification code reception control.

  However, if priority is given to the portable device identification code reception control, the portable device is usually placed in the vehicle compartment so that the portable device is not lost or replaced with another vehicle in an assembly line of a vehicle assembly plant. The portable device identification code reception control is performed, and as a result, it is difficult to confirm whether or not the engine is normally started with a regular mechanical key. Further, when registering the key identification code in the storage device of the engine control unit, the smart keyless entry control unit needs to transmit the received key identification code to the storage device of the engine control unit. Since the machine identification code reception control is performed, the key identification code to be registered is not transmitted to the engine control unit, and it becomes difficult to register the key identification code.

  The present invention has been made in view of such points, and the object of the present invention is to prevent the configuration of the immobilizer system from being changed as much as possible when adding a smart keyless entry system to the immobilizer system. Even in the assembly line of a vehicle assembly plant, even if a portable device is placed in the passenger compartment, it is possible to easily register the key identification code and check whether the engine starts normally with a regular mechanical key. In addition, it is intended to improve the convenience of passengers.

  In order to achieve the above object, according to the present invention, when the number of key identification codes detected by the key identification code detecting means for detecting the key identification code registered in the storage device is less than a predetermined number, key identification code reception control is performed. Is performed with priority over portable device identification code reception control, and when the number of detected key identification codes is equal to or greater than a predetermined number, portable device identification code reception control is performed with priority over key identification code reception control. I made it.

  Specifically, in the first aspect of the invention, when the mechanical key inserted into the ignition key cylinder of the vehicle is a regular mechanical key of the vehicle, or the vehicle door is carried by a passenger of the vehicle. An object of the present invention is a vehicle antitheft device that allows the engine of the vehicle to be started when the lock portable device is an authorized portable device of the vehicle.

  And a key identification code transmitting means provided on the mechanical key for transmitting a key identification code; a portable machine identification code transmitting means provided on the portable device for transmitting the portable machine identification code; and inserted into the ignition key cylinder. Receiving the key identification code transmitted from the key identification code transmitting means of the mechanical key, determining whether the mechanical key is authentic based on the key identification code, and Key identification code reception control for transmitting the same key identification code as the regular mechanical key set for the vehicle to the engine control unit that controls the engine of the vehicle at the time of the regular determination that is a determination that the vehicle is genuine And receiving the portable device identification code transmitted from the portable device identification code transmitting means of the portable device. And determining whether or not the portable device is genuine based on the portable device identification code, and at the time of regular determination that the portable device is genuine, the regular mechanical key and Control means for performing portable device identification code reception control for transmitting the same key identification code to the engine control unit, a storage device in which the same key identification code as the regular mechanical key is registered, and a registration in the storage device Key identification code detecting means for detecting a key identification code, wherein the engine control unit receives the key identification code transmitted from the control means, and the key identification code is registered in the storage device. The vehicle engine is configured to be in a startable state when it matches the identification code, and the control means detects the key identification code. When the number of detected key identification codes by the means is less than the predetermined number, the key identification code reception control is performed with priority over the portable device identification code reception control, while the number of detected key identification codes is the predetermined number. In such a case, it is assumed that the portable device identification code reception control is performed with priority over the key identification code reception control.

  With the above configuration, the control means transmits the same key identification code as the regular mechanical key to the engine control unit regardless of whether the mechanical key is properly determined or the portable device is normally determined. A unit similar to a conventional immobilizer system can be used. That is, the engine control unit of the conventional immobilizer system determines whether or not the key identification code received by the engine control unit matches the key identification code registered in the storage device in advance. By registering the same key identification code, it is determined that they match, and the engine of the vehicle is brought into a startable state. When the number of detected key identification codes is less than a predetermined number (usually the number of mechanical keys owned by the user of the vehicle), the key identification code reception control is preferentially performed. Even if the portable device is placed in the passenger compartment, the control means receives the key identification code and performs appropriate processing. It can be easily confirmed whether or not. On the other hand, when the number of detected key identification codes is equal to or greater than a predetermined number, that is, when completing the registration of the key identification code and the confirmation of engine start and shipping to the factory, the portable device identification code reception control is performed with priority. Convenience is improved for the vehicle user (occupant).

  In the invention of claim 2, in the invention of claim 1, the storage device is provided in the engine control unit.

  As a result, the engine control unit of the conventional immobilizer system provided with the storage device for storing the key identification code can be used as it is.

  In the invention of claim 3, in the invention of claim 2, the control means is configured to register the key identification code detected by the key identification code detection means in a storage means provided in the control means. Shall.

  As a result, the same key identification code as that registered in the storage device of the engine control unit is registered in the storage means of the control means. Therefore, when the mechanical key or portable device is properly determined by the control means, the storage means By transmitting the key identification code registered in the engine control device to the engine control device, the engine control unit always makes the vehicle engine ready to start.

  According to a fourth aspect of the invention, there is provided the engine start detecting means for detecting that the engine has started in the third aspect of the invention, and the control means receives a key identification code not registered in the storage means of the control means. In some cases, the received key identification code is transmitted to the engine control unit, and the key identification code detection means is a mechanical key that transmits the key identification code from the key identification code transmission means by the engine start detection means. It is assumed that when it is detected that the engine has been started, the key identification code registered in the storage device is detected as being the same as the key identification code transmitted to the engine control unit.

  That is, starting the engine with a mechanical key means that the key identification code transmitted from the key identification code transmission means of the mechanical key is the same as the key identification code registered in the storage device of the engine control unit. Become. Therefore, the key identification code registered in the storage device can be easily detected.

  In the invention of claim 5, when the mechanical key inserted into the ignition key cylinder of the vehicle is a regular mechanical key of the vehicle, or a portable device for locking and unlocking the door of the vehicle carried by the vehicle occupant. An object of the present invention is an anti-theft device for a vehicle that can start an engine of the vehicle when the vehicle is a regular portable device.

  And a key identification code transmitting means provided on the mechanical key for transmitting a key identification code; a portable machine identification code transmitting means provided on the portable device for transmitting the portable machine identification code; and inserted into the ignition key cylinder. Receiving the key identification code transmitted from the key identification code transmitting means of the mechanical key, and transmitting the key identification code to an engine control unit that controls the engine of the vehicle; Receiving the portable device identification code transmitted from the portable device identification code transmitting means of the device, determining whether the portable device is genuine based on the portable device identification code, and At the time of normal determination, which is a determination that it is normal, the same key identification code as the normal mechanical key is used for the engine control Control means for performing reception control of portable device identification code transmitted to the unit, a storage device in which the same key identification code as the regular mechanical key is registered, and key identification for detecting the key identification code registered in the storage device Code detecting means, and the engine control unit receives the key identification code transmitted from the control means, and when the key identification code matches the key identification code registered in the storage device, The vehicle engine is configured to be in a startable state, and the control means performs the key identification code reception control when the number of key identification codes detected by the key identification code detection means is less than a predetermined number. While giving priority to the portable device identification code reception control, when the number of detected key identification codes is equal to or greater than the predetermined number, The serial portable device identification code receiving control assumed to be configured to perform in preference to said key identification code reception control.

  According to the present invention, when the control means receives the key identification code, it transmits the key identification code to the engine control unit. Since the engine control unit collates the key identification code, a regular mechanical key is used. Without using the engine, it is not possible to start the engine. Also in this invention, as in the invention of claim 1, a smart keyless entry system can be easily added without changing the configuration of the engine control unit in the conventional immobilizer system, and the key identification code It is possible to easily confirm whether or not the engine is normally started by registration or a regular mechanical key, and it is possible to improve passenger convenience.

  In the invention of claim 6, in the invention of claim 5, the storage device is provided in the engine control unit. Thus, the same effect as that attained by the 2nd aspect can be attained.

  In the invention of claim 7, in the invention of claim 6, the control means is configured to register the key identification code detected by the key identification code detection means in a storage means provided in the control means. Shall. Thus, the same effect as that attained by the 3rd aspect can be attained.

  According to an eighth aspect of the invention, there is provided the engine start detecting means for detecting that the engine has started in the invention of the seventh aspect, wherein the key identification code detecting means is registered in the storage means of the control means. When the key identification code is received and transmitted to the engine control unit, the engine is started with the mechanical key that transmits the key identification code from the key identification code transmission means by the engine start detection means. When this is detected, it is assumed that the key identification code registered in the storage device is detected as being the same as the key identification code transmitted to the engine control unit. Thus, the same effect as that attained by the 4th aspect can be attained.

  As described above, according to the vehicle antitheft device of the present invention, a smart keyless entry system can be easily added without changing the configuration of the engine control unit in the conventional immobilizer system, and the assembly of the vehicle. Even if the portable device is placed in the passenger compartment in a factory assembly line, etc., it is possible to easily register the key identification code and check whether the engine starts normally with a regular mechanical key. In addition, the convenience of the passenger can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a vehicle antitheft device according to an embodiment of the present invention. This antitheft device transmits a key identification code wirelessly to a mechanical key 1 to prevent the vehicle from being stolen. An immobilizer system including a key identification code transmitter 1a as a means, and a portable device identification code transmission as a portable device identification code transmission means in which a vehicle occupant periodically transmits a portable device identification code wirelessly This is a combination with a smart keyless entry system in which the portable device 2 incorporating the device 2a is carried, whereby the door of the vehicle is locked and unlocked and the vehicle engine can be started.

  The portable device 2 is formed with a housing portion 2b for storing the mechanical key 1 (a main key to be described later in this embodiment) (in this embodiment, the mechanical key 1 is inserted into one side surface portion of the portable device). The occupant can carry the portable device 2 in a set state in which the mechanical key 1 is stored in the housing portion. When the engine is to be started with the mechanical key 1, the mechanical key 1 is taken out from the housing portion 2b and inserted into the ignition key cylinder. After the ignition switch is turned on with the mechanical key 1, the starter switch is turned on. Turn it on. However, as will be described later, the engine cannot be started with the mechanical key 1 if the portable device 2 is in the vehicle interior.

  As the key identification code transmitted from the key identification code transmitter 1 a of the mechanical key 1, a different code is set for each mechanical key 1. When the mechanical key 1 is inserted into the ignition key cylinder of the vehicle, the key identification code transmitted from the key identification code transmitter 1a of the mechanical key 1 is the key identification arranged in the vicinity of the ignition key cylinder. It is received via the code receiver 6 by the smart keyless entry control unit 5 as control means mounted on the vehicle.

  The smart keyless entry control unit 5 is provided with a storage device 5a as storage means, and the key identification code registered and stored in the storage device 5a provided in the engine control unit 10 described later is stored in the storage device 5a. The same key identification code (that is, the same key identification code as the regular mechanical key 1 set for the vehicle) is registered and stored. In this embodiment, two keys, a main key and a sub key, are set as the regular mechanical key 1, and the key identification code of the main key is set as the key identification code 1, and the key identification code of the sub key is set as the key identification code 2. Both key identification codes 1 and 2 are registered in the storage device 5a of the smart keyless entry control unit 5 (may be registered and stored in a storage device other than the smart keyless entry control unit 5). Note that the number of regular mechanical keys 1 set for the vehicle may be one or three or more.

  When the smart keyless entry control unit 5 receives the key identification code transmitted from the key identification code transmitter 1a of the mechanical key 1 inserted into the ignition key cylinder, the smart keyless entry control unit 5 performs the mechanical key 1 based on the key identification code. Is determined whether or not it is a regular one (note that this determination is performed every time the ignition switch is turned ON from the mechanical key 1). That is, whether or not the mechanical key 1 is authentic depending on whether or not the received key identification code matches one of the two key identification codes registered in the smart keyless entry control unit 5. It comes to judge. When the mechanical key 1 is authentic (when the received key identification code matches one of the registered key identification codes), the smart keyless entry control unit One of the two key identification codes registered in 5 (one of key identification codes 1 and 2 and not necessarily the same as the received key identification code), that is, the vehicle The same key identification code as the regular mechanical key set for use is transmitted to the engine control unit 10 that controls the engine of the vehicle. Further, when the mechanical key 1 is not legitimate (the received key identification code does not match any of the registered key identification codes), the key identification code of the mechanical key 1 is determined. The key identification code received from the transmitter 1a is transmitted to the engine control unit 10 as it is. Hereinafter, the control when the smart keyless entry control unit 5 receives the key identification code is referred to as key identification code reception control.

  As the portable device identification code transmitted from the portable device identification code transmitter 2 a of the portable device 2, a different code is set for each portable device 2. When the occupant is outside the passenger compartment carrying the portable device 2, the portable device identification code transmitted from the portable device identification code transmitter 2a of the portable device 2 is a vehicle installed outside the vehicle compartment of the vehicle. The data is received by the smart keyless entry control unit 5 through the outdoor antenna 7 (portable device identification code receiver). This smart keyless entry control unit 5 has a portable device identification code (this implementation) in which the portable device identification code received via the outside antenna 7 is registered and stored in the storage device 5a in the smart keyless entry control unit 5 in advance. In the embodiment, one regular portable device 2 is set for the vehicle and the same portable device identification code as that of the regular portable device 2 is registered). Is determined to be genuine for the vehicle, and the portable device 2 is authorized (the received portable device identification code matches the registered portable device identification code). At the time of determination, depending on the distance between the vehicle and the occupant, that is, the received electric field strength of the radio signal transmitted from the portable device identification code transmitter 2a of the portable device 2 carried by the occupant, the door Tsu activates the click actuator 12 performs the locking and unlocking of the door of the vehicle. That is, when the distance between the vehicle and the occupant is smaller than a predetermined value (the reception electric field strength is larger than the predetermined value), the door is unlocked, while the distance between the vehicle and the occupant is equal to or larger than the predetermined value (the reception above). When the electric field strength is below a predetermined value), the door is locked.

  When the occupant enters the vehicle compartment with the portable device 2 carried (when the portable device 2 is in the vehicle compartment), the portable device identification code transmitted from the portable device identification code transmitter 2a of the portable device 2 is The smart keyless entry control unit 5 receives the signal via a vehicle interior antenna 8 (portable device identification code receiver) installed in the vehicle interior of the vehicle.

  Even when the smart keyless entry control unit 5 receives the portable device identification code transmitted from the portable device identification code transmitter 2a of the portable device 2 through the vehicle interior antenna 8, it is based on the portable device identification code. It is determined whether or not the portable device 2 is genuine. That is, whether or not the portable device 2 is genuine for the vehicle depending on whether or not the portable device identification code received via the vehicle interior antenna 8 matches the registered portable device identification code. When the mobile device 2 is genuine, it is determined that the mobile device 2 is genuine (the received mobile device identification code matches the mobile device identification code registered in the smart keyless entry control unit 5). One of the two key identification codes registered in the storage device 5a of the keyless entry control unit 5 (one of the key identification codes 1 and 2), that is, a regular mechanical key set for the vehicle The same key identification code is transmitted to the engine control unit 10. In addition, when the portable device 2 is not authorized (ie, when the received portable device identification code does not match the registered portable device identification code), any key identification code is assigned to the engine control unit. Do not send to 10. Hereinafter, the control when the smart keyless entry control unit 5 receives the key identification code via the vehicle interior antenna 8 is referred to as portable device identification code reception control.

  The smart keyless entry control unit 5 constitutes a key identification code detecting means for detecting a key identification code registered in the storage device 10a of the engine control unit 10, as will be described later. When both of the portable device identification codes are received, the number of detected key identification codes is less than a predetermined number (in this embodiment, the number is the same as the number of mechanical keys 1 owned by the user of the vehicle, which is two). In some cases, the key identification code reception control is performed with priority over the portable device identification code reception control. On the other hand, when the number of detected key identification codes is equal to or greater than a predetermined number, the portable device identification code reception control is set to the key identification code. It is configured to give priority to reception control (in this embodiment, the number of detected key identification codes is After a few more via the regular determination of the portable unit 2 by detecting the engine start becomes the portable device identification code receiving control as performed by the priority). Even when priority is given to key identification code reception control, when only a portable device identification code is received, portable device identification code reception control is performed, and even when priority is given to portable device identification code reception control, key identification is performed. When only the code is received, key identification code reception control is performed.

  At the time of shipment from the factory, two key identification codes are registered in the storage device 10a of the engine control unit 10, and the two key identification codes are detected by the smart keyless entry control unit 5. When used, the mobile device identification code reception control is preferentially performed. That is, while the portable device identification code transmitted from the portable device identification code transmitter 2a of the portable device 2 is periodically received via the vehicle interior antenna 8, the mechanical key 1 inserted into the ignition key cylinder Even when the key identification code transmitted from the key identification code transmitter 1a is received, priority is given to the portable device identification code reception control. Even if the ignition switch is turned from OFF to ON by the key 1, only the portable device identification code reception control is performed without performing the key identification code reception control. The key identification code reception control is performed when the portable device identification code is not periodically received and when the ignition switch is turned from OFF to ON by the mechanical key 1. Further, after the ignition switch is turned on by the mechanical key 1, even if the portable device identification code is received, the portable device identification code reception control is not performed until the ignition switch is turned off. Further, during operation of the engine, key identification code reception control and portable device identification code reception control are not performed.

  The smart keyless entry control unit 5 is connected to an engine start detecting means 13 (for example, a starter switch or an engine speed detection sensor) that detects that the engine of the vehicle has started.

  The engine control unit 10 is configured to make the vehicle engine startable when the key identification code transmitted from the smart keyless entry control unit 5 when the mechanical key 1 or the portable device 2 is properly determined is received. Has been. Specifically, the engine control unit 10 has the same configuration as that used in a conventional immobilizer system, and is provided with a storage device 10a, similar to the smart keyless entry control unit 5, and this storage device. The same key identification code as the regular mechanical key 1 (in this embodiment, the key identification codes 1 and 2) is registered and stored in 10a (stored in a storage device or the like different from the engine control unit 10). May be) Then, the engine control unit 10 determines whether or not the received key identification code matches one of the two key identification codes registered in the storage device 10a of the engine control unit 10, and determines that they match. When this happens, the vehicle engine is brought into a startable state. That is, the key identification code transmitted from the smart keyless entry control unit 5 when the mechanical key 1 or the portable device 2 is properly determined matches one of the plurality of key identification codes registered in the engine control unit 10. When the key identification code is received, the engine control unit 10 determines that the key identification code matches one of a plurality of registered key identification codes. Is ready to start.

  When the engine control unit 10 is ready to start the engine in this way, an occupant carrying the portable device 2 in the vehicle interior rotates an engine start knob provided separately from the ignition key cylinder. The starter switch is turned on and the engine can be started without a key. Further, when only the mechanical key 1 is carried and the portable device 2 is not carried, or when the portable device 2 is out of order, the engine can be started with the mechanical key 1.

  In addition, since the key identification code transmitted from the smart keyless entry control unit 5 at the time of the irregular determination of the mechanical key 1 does not match one of the two key identification codes registered in the engine control unit 10, The engine control unit 10 does not make the vehicle engine startable.

  Registration of the key identification code to the storage device 10a of the engine control unit 10 is performed in a single state before connection between the engine control unit 10 and the smart keyless entry control unit 5 (performed at the manufacturing factory of the engine control unit 10). It can also be performed in the completed state of the anti-theft device. When registering in the completed state, the registration mode is set by a predetermined operation (performed at a vehicle assembly factory or the like).

  On the other hand, the registration of the key identification code in the storage device 5a of the smart keyless entry control unit 5 is performed after the registration of the key identification code in the engine control unit 10 and in the completed state of the antitheft device (in the registration mode). Or a normal state). The smart keyless entry control unit 5 receives a key identification code that is not registered in the storage device 5a of the smart keyless entry control unit 5 (no key identification code is registered in the smart keyless entry control unit 5). The received key identification code is transmitted to the engine control unit 10 (when a key identification code is registered in the smart keyless entry control unit 5 and other key identification codes are received). The key identification code is received when no key identification code is registered in the smart keyless entry control unit 5 by transmitting the received key identification code to the engine control unit 10 due to the irregular determination of the mechanical key 1. Sometimes And the engine start detecting means 13 detects that the engine has been started with the mechanical key 1 that transmits the key identification code from the key identification code transmitter 1a. The key identification code registered in the storage device 10a of the engine control unit 10 is detected as being the same as the key identification code transmitted to the engine control unit 10. The smart keyless entry control unit 5 registers the detected key identification code (that is, the key identification code transmitted to the engine control unit 10) in the storage device 5a of the smart keyless entry control unit 5. Yes. That is, even if the key identification code is not registered in the smart keyless entry control unit 5, the engine is started. This means that the received key identification code is the same as the key identification code registered in the engine control unit 10. Therefore, the smart keyless entry control unit 5 registers the same key identification code as the key identification code registered in the engine control unit 10 in the storage device 5a. Since the engine is started at the time of registration, it can be confirmed whether or not the engine starts normally by using a regular mechanical key. Note that registration of the portable device identification code in the storage device 5a of the smart keyless entry control unit 5 has already been performed in a single state of the smart keyless entry control unit 5.

  Here, the control when the smart keyless entry control unit 5 receives the key identification code or the portable device identification code will be described based on the flowchart of FIG.

  First, in step S1, it is determined whether or not the key identification code has been received via the key identification code receiver 6. If the determination in step S1 is NO, the process proceeds to step S10, while the determination in step S1 is determined. If yes, go to step S2.

  In step S2, it is determined whether or not the portable device identification code has been received via the vehicle interior antenna 8. If the determination in step S2 is NO, the process proceeds to step S7, while the determination in step S2 is YES. If there is, the process proceeds to step S3.

  In step S3, it is determined whether or not two or more key identification codes registered in the storage device 10a of the engine control unit 10 have been detected. If the determination in step S3 is NO, the process proceeds to step S6. On the other hand, if the determination in step S3 is YES, the process proceeds to step S4.

  In step S4, it is determined whether or not the portable device 2 is used to start the engine by turning the engine starting knob (whether the engine start is detected by the engine start detecting means 13 after the normal determination of the portable device 2). If the determination in step S4 is NO, the process proceeds to step S6, and then ends. On the other hand, if the determination in step S4 is YES, the process proceeds to step S5, and then ends.

  In step S5, the portable device identification code reception control is given priority over the key identification code reception control, and in step S6, the key identification code reception control is given priority over the portable device identification code reception control.

  In step S7 that proceeds when the determination in step S2 is NO, it is determined whether or not two or more key identification codes registered in the storage device 10a of the engine control unit 10 have been detected. When the determination is NO, the process proceeds to step S6. After that, the process ends. When the determination at step S7 is YES, the process proceeds to step S8.

  In step S8, it is determined whether or not the engine is started using the portable device 2. If the determination in step S8 is NO, the process proceeds to step S6, and then ends, while the determination in step S8. When YES is determined, the process proceeds to step S9, and the portable device identification code reception control is performed with priority over the key identification code reception control in the same manner as in step S5.

  In step S10 that proceeds when the determination in step S1 is NO, it is determined whether or not the portable device identification code has been received via the vehicle interior antenna 8. If the determination in step S10 is NO, the process ends. On the other hand, if the determination in step S10 is yes, the process proceeds to step S11.

  In step S11, it is determined whether or not two or more key identification codes registered in the storage device 10a of the engine control unit 10 have been detected. If the determination in step S11 is NO, the process ends as it is. When the determination in S11 is YES, the process proceeds to step S12.

  In the above step S12, it is determined whether or not the engine has been started using the portable device 2. If the determination in step S12 is NO, the process proceeds to step S14, and then the process ends. If YES, the process proceeds to step S13, and then ends.

  In step S13, portable device identification code reception control is performed with priority over key identification code reception control, and in step S14, key identification code reception control is performed with priority over portable device identification code reception control.

  Until the smart keyless entry control unit 5 detects a predetermined number of key identification codes registered in the storage device 10a of the engine control unit 10 under the control of the smart keyless entry control unit 5, the key identification code reception control has priority. Done. As a result, operations such as registration of a key identification code performed in an assembly line of a vehicle assembly factory and confirmation of whether or not the engine is normally started by a regular mechanical key 1 are facilitated. That is, in registering a key identification code in the storage device 10a of the engine control unit 10 and the storage device 5a of the smart keyless entry control unit 5 in the completed state of the anti-theft device in an assembly line of a vehicle assembly factory, If the portable device 2 is placed in the passenger compartment and the priority is given to the portable device identification code reception control, the portable device identification code reception control is performed and the key identification code is registered, as in the factory shipment. I can't do that. However, in this embodiment, since priority is given to the key identification code reception control, the engine is normally started by registration of the key identification code or the regular mechanical key 1 while the portable device 2 is left in the passenger compartment. It can be confirmed whether or not.

  Then, the smart keyless entry control unit 5 detects two key identification codes of the key identification code 1 and the key identification code 2 registered in the storage device 10a of the engine control unit 10 (at the same time, the storage device of the smart keyless entry control unit 5). The key identification code 1 and the key identification code 2 are registered in 5a), and then the engine is started using the portable device 2 (when the portable device 2 is used, the mechanical key 1 is removed from the ignition key cylinder). As a result, the portable device identification code reception control is preferentially performed. Since it is shipped from the factory in this state, convenience when the user (occupant) uses the vehicle is improved.

  When the key identification code exceeding the predetermined number is registered in the storage device 10a of the engine control unit 10 and the key identification code in the storage device 5a of the smart keyless entry control unit 5 after shipment from the factory, the portable device identification code Since reception control is given priority, the portable device 2 may be placed outside the passenger compartment.

  In the above embodiment, when the smart keyless entry control unit 5 receives the key identification code, the smart keyless entry control unit 5 determines whether or not the mechanical key 1 is legitimate based on the key identification code. At the time of determination, the identification code registered in the smart keyless entry control unit 5 is configured to be transmitted to the engine control unit 10, but when the key identification code is received, it is determined whether or not the mechanical key is genuine. The key identification code may be transmitted as it is to the engine control unit 10 without performing the above.

  In this case, when the smart keyless entry control unit 5 receives the portable device identification code, the smart keyless entry control unit 5 determines whether the portable device 2 is genuine based on the portable device identification code, as in the above embodiment. The identification code registered in the smart keyless entry control unit 5 is transmitted to the engine control unit 10 when the portable device 2 is properly determined. The engine control unit 10 has the same configuration as in the above embodiment. Even in this configuration, the engine control unit 10 collates the key identification code, so the engine cannot be started unless the regular mechanical key 1 is used.

  When the smart keyless entry control unit 5 receives the key identification code not registered in the storage device 5a of the smart keyless entry control unit 5 and transmits the key identification code to the engine control unit 10, When the start detection means 13 detects that the engine has been started with the mechanical key 1 that transmits the key identification code from the key identification code transmitter 1a, the key identification registered in the storage device 10a of the engine control unit 10 The code is configured to be detected as being the same as the key identification code transmitted to the engine control unit 10.

  Even with this configuration, as in the above embodiment, it is possible to easily perform registration of a key identification code, confirmation of whether or not the engine starts normally with a regular mechanical key, etc., and passenger convenience Can be improved.

  In the above embodiment, the key identification code registered in the storage device 10a of the engine control unit 10 is transmitted to the engine control unit 10 when the engine start detection means 13 detects that the engine has been started. The engine control unit 10 detects the same key identification code as the key identification code registered in the storage device 10a of the engine control unit 10 in the smart keyless entry control unit 5. The smart keyless entry control unit 5 may receive the key identification code from the engine control unit 10 and detect the key identification code.

  Furthermore, the engine start detection means 13 may be configured separately from the smart keyless entry control unit 5 as the control means.

  INDUSTRIAL APPLICABILITY The present invention is useful for a vehicle antitheft device that combines an immobilizer system and a smart keyless entry system, and is particularly portable in an assembly line or the like of a vehicle assembly plant while preventing the configuration of the immobilizer system from being changed as much as possible. Even when the machine is placed in the passenger compartment, it is useful for easily registering a key identification code and confirming whether or not the engine can be started normally by a regular mechanical key.

1 is a schematic configuration diagram illustrating a vehicle antitheft device according to an embodiment of the present invention. It is a flowchart which shows the control procedure when the key identification code in a smart keyless entry control unit or a portable device identification code is received.

Explanation of symbols

1 Mechanical Key 1a Key Identification Code Transmitter (Key Identification Code Transmitting Means)
2 portable device 2a portable device identification code transmitter (portable device identification code transmitting means)
2b Housing 5 Smart keyless entry control unit (control means, key identification code detection means)
5a Storage device (storage means)
10 Engine control unit 10a Storage device 13 Engine start detection means

Claims (8)

When the mechanical key inserted into the ignition key cylinder of the vehicle is an authorized mechanical key of the vehicle, or the portable device for locking and unlocking the door of the vehicle carried by the vehicle occupant is an authorized portable device of the vehicle A vehicle anti-theft device capable of starting the vehicle engine,
Key identification code transmitting means provided on the mechanical key for transmitting a key identification code;
A portable device identification code transmitting means for transmitting the portable device identification code provided in the portable device;
The key identification code transmitted from the key identification code transmitting means of the mechanical key inserted into the ignition key cylinder is received, and it is determined whether or not the mechanical key is authentic based on the key identification code. At the same time, at the time of normal determination that is a determination that the mechanical key is normal, the same key identification code as the normal mechanical key set for the vehicle is transmitted to the engine control unit that controls the engine of the vehicle. Key identification code reception control, and the portable device identification code transmitted from the portable device identification code transmitting means of the portable device is received, and whether or not the portable device is genuine based on the portable device identification code At the time of normal determination, which is a determination that the portable device is normal, the normal mechanical key And control means for the portable device identification code receiving control to be sent to the engine control unit of the same key identification code and,
A storage device in which the same key identification code as the regular mechanical key is registered;
Key identification code detection means for detecting a key identification code registered in the storage device,
The engine control unit receives the key identification code transmitted from the control means, and can start the vehicle engine when the key identification code matches the key identification code registered in the storage device. Configured to be in a state,
The control means preferentially performs the key identification code reception control over the portable device identification code reception control when the number of detected key identification codes by the key identification code detection means is less than a predetermined number. The vehicle theft characterized in that the portable device identification code reception control is prioritized over the key identification code reception control when the number of detected key identification codes is equal to or greater than the predetermined number. Prevention device. The vehicle antitheft device according to claim 1,
An antitheft device for a vehicle, wherein the storage device is provided in the engine control unit. The vehicle antitheft device according to claim 2,
The vehicle antitheft device, wherein the control means is configured to register the key identification code detected by the key identification code detection means in a storage means provided in the control means. The vehicle antitheft device according to claim 3,
Engine start detection means for detecting that the engine has started,
The control means is configured to transmit the received key identification code to the engine control unit when a key identification code not registered in the storage means of the control means is received,
The key identification code detection means detects the key identification registered in the storage device when the engine start detection means detects that the engine has been started with a mechanical key that transmits the key identification code from the key identification code transmission means. An anti-theft device for a vehicle, characterized in that the code is detected as being the same as the key identification code transmitted to the engine control unit. When the mechanical key inserted into the ignition key cylinder of the vehicle is an authorized mechanical key of the vehicle, or the portable device for locking and unlocking the door of the vehicle carried by the vehicle occupant is an authorized portable device of the vehicle A vehicle anti-theft device capable of starting the vehicle engine,
Key identification code transmitting means provided on the mechanical key for transmitting a key identification code;
A portable device identification code transmitting means for transmitting the portable device identification code provided in the portable device;
A key identification code for receiving the key identification code transmitted from the key identification code transmitting means of the mechanical key inserted into the ignition key cylinder and transmitting the key identification code to an engine control unit for controlling the engine of the vehicle. Receiving control and receiving the portable device identification code transmitted from the portable device identification code transmitting means of the portable device, and determining whether or not the portable device is genuine based on the portable device identification code And a control means for performing portable device identification code reception control for transmitting the same key identification code as the regular mechanical key to the engine control unit at the time of regular determination, which is a determination that the portable device is genuine. ,
A storage device in which the same key identification code as the regular mechanical key is registered;
Key identification code detection means for detecting a key identification code registered in the storage device,
The engine control unit receives the key identification code transmitted from the control means, and can start the vehicle engine when the key identification code matches the key identification code registered in the storage device. Configured to be in a state,
The control means preferentially performs the key identification code reception control over the portable device identification code reception control when the number of detected key identification codes by the key identification code detection means is less than a predetermined number. The vehicle theft characterized in that the portable device identification code reception control is prioritized over the key identification code reception control when the number of detected key identification codes is equal to or greater than the predetermined number. Prevention device. The vehicle antitheft device according to claim 5,
An antitheft device for a vehicle, wherein the storage device is provided in the engine control unit. The vehicle antitheft device according to claim 6,
The vehicle antitheft device, wherein the control means is configured to register the key identification code detected by the key identification code detection means in a storage means provided in the control means. The vehicle antitheft device according to claim 7,
Engine start detection means for detecting that the engine has started,
When the control means receives the key identification code that is not registered in the storage means of the control means and transmits the key identification code to the engine control unit, the key identification code detection means, by the engine start detection means, The key identification code registered in the storage device when the engine start is detected by the mechanical key that transmits the key identification code from the key identification code transmitting means, and the key identification code transmitted to the engine control unit; An antitheft device for a vehicle, characterized in that it is configured to detect that they are the same.

Images