JP2016205001A - Electronic key system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic key system capable of preventing a vehicle from being stolen by means of illegal registration of an electronic key even when a user leaves the vehicle for a long time.SOLUTION: The present invention relates to an electronic key system which authenticates an electronic key on the basis of transmitted information transmitted from the electronic key to a vehicle and electronic key information registered in the vehicle in advance, the electronic key system comprising: a determination part which determines whether the vehicle is in a predetermined place; and an inhibition part which inhibits electronic key information from being registered in the vehicle once the determination part determines that the vehicle is in the predetermined place.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle electronic key system.

  2. Description of the Related Art Conventionally, there is known an electronic key system that authenticates the validity of an electronic key by checking information (such as an electronic key ID) wirelessly transmitted from the electronic key to electronic vehicle information registered in advance in the vehicle (for example, Patent Document 1).

  This configuration realizes a smart entry function and push-type engine start function that can lock and unlock the door and start the engine without inserting a key into the key cylinder while ensuring security. be able to.

JP 2003-244688 A

  By the way, in order to authenticate the validity of the electronic key, as described above, the electronic key information needs to be registered in advance in an ECU (Electric Control Unit) or the like mounted on the vehicle. For example, by connecting a failure diagnosis tool to a DLC (Data Link Coupler) 3 connector or the like of the vehicle, electronic key information is registered in the ECU through the DLC 3 connector.

  However, if the user leaves the vehicle for a long time, a third party may connect a failure diagnosis tool or the like to the vehicle to perform unauthorized registration of the electronic key. The vehicle may be stolen using the key.

  In view of the above problems, an object of the present invention is to provide an electronic key system that can prevent theft of the vehicle due to unauthorized registration of the electronic key even when the user leaves the vehicle for a long time.

To achieve the above object, in one embodiment, an electronic key system comprises:
An electronic key system for authenticating the validity of the electronic key based on transmission information transmitted from the electronic key to the vehicle and electronic key information registered in advance in the vehicle,
A determination unit for determining whether or not the vehicle exists in a preset location;
And a prohibiting unit that prohibits registration of electronic key information in the vehicle when the determining unit determines that the vehicle is present at the location.

  According to the present embodiment, it is possible to provide an electronic key system capable of preventing theft of the vehicle due to unauthorized registration of the electronic key even when the user leaves the vehicle for a long time.

It is a schematic diagram which shows an example of a structure of the electronic key system which concerns on this embodiment. It is a flowchart which shows notionally an example of the processing operation corresponding to the electronic key information registration prohibition function by the electronic key system which concerns on this embodiment.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating an example of a configuration of an electronic key system 1 according to the present embodiment.

  The electronic key system 1 according to the present embodiment includes an electronic key 10 and an ECU 20 mounted on the vehicle V. Transmission information transmitted from the electronic key 10 to the vehicle V and an electronic key registered in advance in the vehicle V (ECU 20). The validity of the electronic key 10 is authenticated based on the information. By using such an authentication function, a user who possesses the electronic key 10 can lock and unlock the door of the vehicle V only by touching the touch sensor of the door handle of the vehicle V or pressing a trigger switch. An entry function can be realized. Further, by using such an authentication function, when the user who holds the electronic key 10 gets on the vehicle V, the push type that can start the engine of the vehicle V only by pressing a predetermined button or the like. An engine start function can be realized.

  The electronic key 10 is a portable authentication terminal having a wireless communication function. The electronic key 10 is a response including a unique ID code stored therein in response to a request signal transmitted from the ECU 20 via a vehicle exterior transmitter and a vehicle interior transmitter (both not shown) provided in the vehicle V. A signal is transmitted to the vehicle V.

  The electronic key information of the electronic key 10 is already registered in the vehicle V (ECU 20). Further, the electronic key 10 may be one or plural.

  The ECU 20 is an electronic control unit that authenticates the validity of the electronic key 10. The ECU 20 is composed of, for example, a microcomputer and implements various control processes by executing various programs stored in the ROM on the CPU.

  The ECU 20 wirelessly transmits a request signal to the vicinity of the vehicle V (a predetermined range centering on the transmitter outside the vehicle) via the transmitter outside the vehicle according to a predetermined condition. Further, the ECU 20 wirelessly transmits a request signal to the vehicle interior of the vehicle V via the vehicle interior transmitter according to a predetermined condition.

  Moreover, ECU20 authenticates the legitimacy of the electronic key 10 according to the response signal from the electronic key 10 received via the receiver 20a including a receiving antenna. Specifically, the ID code included in the response signal is compared with the ID code included in the electronic key information registered in advance in the ECU 20 (stored in advance in an internal memory or the like). If there is an ID code included in one or a plurality of electronic key information that matches the ID code included in the response signal, the validity of the electronic key 10 is authenticated. As a result, an electronic key (unregistered electronic key 40) that is not registered in advance in the ECU 20 is not authenticated due to the mismatch of the ID code, so that a smart entry function, a push-type engine start function, and the like are realized while ensuring security. be able to.

  The authentication based on the coincidence of the ID code is an example, and instead of or in addition to the authentication, the electronic key 10 based on information transmitted from the electronic key 10 by another method and electronic key information registered in the ECU 20 in advance. Authentication may be performed.

  Moreover, ECU20 performs the control process which registers the electronic key information of the unregistered electronic key 40 according to predetermined conditions (electronic key registration control). The ECU 20, for example, uses the unregistered electronic key 40 in response to a predetermined command transmitted via a vehicle-mounted LAN such as a CAN (Controller Area Network) from a failure diagnosis tool connected to the DLC3 connector of the vehicle V. A control process for registering electronic key information is executed.

  In addition, the electronic key system 1 according to the present embodiment has a function (electronic key information registration prohibiting function) that prohibits the electronic key registration control described above according to a predetermined condition. The electronic key system 1 includes an electronic key information reading reader (hereinafter simply referred to as “reading reader”) 30 as a component related to the electronic key information registration prohibiting function.

  The reading reader 30 is used when the vehicle V is parked for a long time (the user is away from the vehicle V for a long time). Where the electronic key is to be placed. The reading reader 30 reads electronic key information including an ID code of the electronic key 10 by bidirectional wireless communication with the electronic key 10 placed in proximity. In the reading reader 30, the same electronic key information as the electronic key information registered in advance in the vehicle V is registered. For example, the reading reader 30 compares the ID code included in the read electronic key information with the ID code included in the electronic key information registered in advance, and confirms that there is a match. 10 is detected. And the reading reader | leader 30 will authenticate that the vehicle V exists in the setting place mentioned above, if the electronic key 10 is detected. When the reading reader 30 performs such authentication, the reading reader 30 wirelessly transmits information indicating that the vehicle V exists at the set location to the vehicle V via the transmission antenna 30a.

  Information wirelessly transmitted from the transmitting antenna 30a may be transmitted directly to the vehicle V by radio waves or the like, or may be transmitted to the vehicle V via a mobile phone line or the like. Further, the reading reader 30 may be configured to be connected by wire to a telephone line or the like. In such a case, information is transmitted from the telephone line or the like to the vehicle V via the mobile phone line or the like.

  Next, details of the electronic key information registration prohibition function will be described.

  Note that it is assumed that the setting location described above is the home of the user of the vehicle V, and that the reading reader 30 is already deployed in the key storage area at home.

(1) Determination that the vehicle V exists in the user's home H (at-home authentication)
As described above, the reading reader 30 authenticates that the vehicle V exists in the home H as a setting location based on the two-way wireless communication with the electronic key 10 placed in close proximity (home authentication).

(2) Transmission of information indicating that the vehicle V exists at the user's home H (at-home information) When the reading reader 30 performs at-home authentication, the at-home information is transmitted to the vehicle V via the transmission antenna 30a as described above. Wireless transmission.

(3) Prohibition of electronic key information registration control When the ECU 20 receives home information from the reading reader 30 deployed at home H via the receiver 20a, the ECU 20 performs electronic key information registration control by turning on a prohibition flag or the like. Execute the prohibited process. Thereby, for example, even when a predetermined command is transmitted to the ECU 20 via the in-vehicle LAN from a failure diagnosis tool or the like connected to the DLC3 connector of the vehicle V, the ECU 20 stores the electronic key information of the unregistered electronic key 40. Do not execute the control process to be registered.

  Next, a processing operation corresponding to the electronic key information registration prohibiting function by the electronic key system 1 (ECU 20, reading reader 30) according to the present embodiment will be described.

  FIG. 2 is a flowchart conceptually showing an example of a processing operation corresponding to the electronic key information registration prohibition function by the electronic key system 1 according to the present embodiment. Specifically, a flowchart (FIG. 2A) showing an example of a processing operation corresponding to the electronic key information registration prohibiting function by the reading reader 30 and an example of a processing operation corresponding to the electronic key information registration prohibiting function by the ECU 20. It is a flowchart (FIG.2 (b)) shown.

  Note that the flow shown in FIG. 2A is executed at predetermined time intervals. Further, the flow shown in FIG. 2B is performed until the process of step S202 described later (process for prohibiting electronic key information registration control) is executed in the ignition-off (IG-OFF) state of the vehicle V. It is executed at predetermined time intervals.

  First, the processing operation by the reading reader 30 will be described with reference to FIG.

  In step S101, the reading reader 30 determines whether or not the electronic key 10 has been detected (whether or not the vehicle V exists at home). If the reading reader 30 detects the electronic key 10, the process proceeds to step S102. If the reading reader 30 does not detect the electronic key 10, the current process is terminated.

  In step S102, the reading reader 30 determines whether or not the electronic key 10 is continuously detected, that is, whether or not the electronic key 10 is detected in the previous processing of step S101. If the reading reader 30 has not detected the electronic key 10 continuously, the process proceeds to step S103. If the reading reader 30 has detected the electronic key 10 continuously, the current process is terminated.

  In step S103, the reading reader 30 performs home authentication.

  In step S104, the reading reader 30 wirelessly transmits home information to the vehicle V via the transmission antenna 30a, and ends the current process.

  Next, the processing operation by the ECU 20 will be described with reference to FIG.

  In step S201, the ECU 20 determines whether home information has been received from the reading reader 30 via the receiver 20a. When the home information is received, the ECU 20 proceeds to step S202. When the home information is not received, the ECU 20 ends the current process.

  In step S202, the ECU 20 prohibits the electronic key information registration control and ends the current process.

  When the electronic key information registration control is prohibited in the IG-OFF state, when the vehicle V is subsequently turned on (IG-ON), the ECU 20 turns off the prohibition flag or the like, thereby controlling the electronic key information registration control. Cancel the state of prohibiting.

  As described above, when the electronic key system 1 according to the present embodiment determines that the vehicle V exists at a setting place where the vehicle V is parked for a long time such as at home (the user leaves the vehicle V for a long time), The registration of the electronic key information of the unregistered electronic key 40 is prohibited. Specifically, when the reading reader 30 deployed at a set location such as home detects the electronic key 10 (an electronic key registered in advance in the vehicle V), the fact that the vehicle V exists at the set location such as home. Information is transmitted to the vehicle V. And ECU20 mounted in the vehicle V will prohibit electronic key information registration control according to the predetermined command from the tool for failure diagnosis connected from the outside, etc., if this information is received. As a result, in a situation where the vehicle V is parked at a setting place where the user is away from the vehicle V for a long time, an unregistered electronic key 40 is registered in the ECU 20 by a malicious third party, and the vehicle V is stolen. Can be prevented.

  The registration of the electronic key information of the unregistered electronic key 40 is very rarely performed by the individual user, and is usually performed at a dealer or an automobile maintenance shop. Therefore, even if the registration of the electronic key information of the unregistered electronic key 40 is prohibited at a setting place such as home, there is no disadvantage for the convenience of the user.

  As mentioned above, although the form for implementing this invention was explained in full detail, this invention is not limited to this specific embodiment, In the range of the summary of this invention described in the claim, various Can be modified or changed.

1 Electronic key system 10 Electronic key 20 ECU (prohibited part)
20a Receiver 30 Electronic key information reader (determination unit)
30a Transmitting antenna 40 Unregistered electronic key V Vehicle

Claims (1)

An electronic key system for authenticating the validity of the electronic key based on transmission information transmitted from the electronic key to the vehicle and electronic key information registered in advance in the vehicle,
A determination unit for determining whether or not the vehicle exists in a preset location;
When the determination unit determines that the vehicle is present at the location, the determination unit includes a prohibition unit that prohibits registration of electronic key information to the vehicle.
Electronic key system.

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