JP2008038512A - On-vehicle equipment remote controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle equipment remote controller capable of performing a backup mutual communication even if a slot is abolished. <P>SOLUTION: This on-vehicle equipment remote controller comprises a first communication means having a first transmission means of an on-vehicle station for transmitting a question signal to a mobile device, a second receiving means of the mobile device for receiving the question signal, and a first receiving means of the on-vehicle station for receiving response signals returned by the second transmission means of the mobile device and performing mutual communication, a second communication means generating an electromotive force in the mobile device and performing a communication with the mobile device, and an operating control means for controlling the operating state of the on-vehicle equipment under the condition that one of the mutual communications is established. The communication system of the first transmission means and the second transmission means is spectrum diffusion communication system. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is representative of a smart entry system for unlocking a vehicle door and permitting engine start on the condition that mutual communication between a portable device carried by a driver and an operation control means provided on the vehicle side is established. The present invention relates to an in-vehicle device remote control device.

  When the user who owns the portable device approaches the vehicle, if the user communicates with the portable device and is confirmed to be an authorized user, the user can enter the vehicle interior by unlocking the door (smart function 1 An in-vehicle device remote control device is known (see, for example, Patent Document 1). In this smart entry system, an engine start switch is provided in the vehicle interior, and when it is confirmed that the user is a legitimate user, an on-vehicle push start function that allows the engine to be started simply by pressing the engine start switch ( Some have smart function 2).

  The in-vehicle device remote control device with this in-vehicle push start function is installed in the vehicle compartment when the battery of the portable device has run out or has failed and mutual communication with the portable device cannot be established. When the engine start switch is pushed with the insertion of the portable device into the slot that constitutes the immobilizer amplifier, when the engine start switch is pressed, the transponder method (the immobilizer amplifier sends the electromotive force and signal to the transponder in the portable device, The ID signal is sent to the authentication ECU through the immobilizer amplifier, thereby performing mutual authentication (immobilizer function) for ID authentication. In this way, backup mutual communication can be performed even if the battery of the portable device runs out or malfunctions.

JP 2002-168018 A

  However, it is not preferable to provide a dedicated slot only for backup mutual communication in the event of a battery shortage or failure of the portable device, because this increases the number of components, which in turn increases costs. Even from the viewpoint that the frequency of use of backup intercommunication is very low, it is desirable to eliminate the slot. If the slot is abolished, the backup mutual communication trigger is lost, and the above situation cannot be handled by the backup function. In other words, in order to switch from normal control when the smart function is enabled to emergency control when the smart function is disabled, a slot has to be provided.

  In view of the above, an object of the present invention is to provide an in-vehicle device remote control device (smart entry system) that can perform backup mutual communication even if a slot is eliminated.

  The in-vehicle device remote control device according to the present invention includes a first transmission unit of an in-vehicle station that transmits an interrogation signal to a portable device, a second reception unit of the portable device that receives the interrogation signal, and the second reception. Second transmission means of the portable device that transmits a response signal to the interrogation signal received by the means, and first reception means of the in-vehicle station that receives the response signal transmitted by the second transmission means First communication means for performing mutual communication between the in-vehicle station and the portable device and authenticating the portable device, transmitting a question signal from the in-vehicle station, generating an electromotive force in the portable device, and responding from the portable device A second communication means for transmitting a signal and receiving the signal at the in-vehicle station, and the in-vehicle station and the portable device communicate with each other to authenticate the portable device; Control the operating status of in-vehicle devices The in-vehicle equipment remote control system comprising operation control means for, those communication method of the first transmission means and the second receiving means is a spread spectrum communication system.

  According to the in-vehicle device remote control device of the present invention, since the communication method of the first transmitting means and the second receiving means is the spread spectrum communication method, the mutual communication of the first communication means and the mutual communication of the second communication means are: Communication can be performed simultaneously under the conditions for transmitting the first communication means, the trigger for mutual communication of the second communication means is not required, and the trigger slot can be eliminated. For this reason, the vehicle-mounted equipment remote control apparatus which can perform the mutual communication of a 2nd communication means reliably can be obtained.

Embodiment 1 FIG.
A block configuration of an in-vehicle device remote control device to which Embodiment 1 of the present invention is applied and a control mechanism for controlling door lock / unlock, steering lock release, and engine start permission in cooperation with the in-vehicle device remote control device As shown in FIG. The in-vehicle device remote control device (smart entry system) includes a portable device 1 possessed by a user, an LF transmitter 4 (first transmission means) of an in-vehicle station mounted on the vehicle side, and an RF receiver 2 (first reception). Means), an immobilizer amplifier integrated engine start switch 3 and an authentication ECU 5. In addition, a control mechanism that cooperates with the in-vehicle device remote control device includes a steering lock ECU 11, an engine ECU 12, and a body ECU 13.

  The portable device 1 includes an RF transmitter 1a (second transmitter) that transmits radio waves using the RF band, a receiver 1b (second receiver) that receives radio waves using the LF band, and a transponder 1c. It is provided and configured. The transmission unit 1a stores a smart communication encryption key. The receiving unit 1b receives a radio wave indicating a question from the authentication ECU 5. When the transmission unit 1a receives the inquiry signal from the reception unit 1b, the transmission unit 1a generates a response signal encrypted with the encryption key, and transmits radio waves in the RF band. On the other hand, the immobilizer communication encryption key is stored in the transponder 1c. The transponder 1c is driven by a well-known transponder system. When the transponder 1c receives a radio wave indicating an immobilizer interrogation signal superimposed on the transponder drive radio wave from the immobilizer amplifier integrated engine start switch 3, an electromotive force is generated and an encryption key is used. It plays a role of generating an encrypted response signal and transmitting a radio wave indicating the immobilizer response signal toward the immobilizer amplifier integrated engine start switch 3.

  The RF receiver 2 is connected to the authentication ECU 5 by wiring, receives an RF band radio wave (response signal) transmitted by the transmission unit 1a in the portable device 1, and transmits it to the authentication ECU 5. The immobilizer amplifier integrated engine start switch 3 is connected to the authentication ECU 5 by wiring, and is disposed, for example, in the vicinity of the steering wheel in the passenger compartment, and is an engine start switch in which the immobilizer amplifier is integrated. By pressing this, the engine can be started.

  The immobilizer amplifier integrated engine start switch 3 is provided with an immobilizer amplifier coil 3a. The immobilizer amplifier coil 3a functions as an antenna so that radio waves can be transmitted and received. As will be described later, the immobilizer amplifier integrated engine start switch 3 is configured to output a query signal indicating that an immobilizer response signal should be transmitted to the transponder 1c when a signal indicating an immobilizer query signal transmission request is transmitted from the authentication ECU 5. It receives a radio wave indicating an immobility response signal returned from the transponder 1c, and transmits it to the authentication ECU 5.

  The authentication ECU 5 corresponds to an integrated smart ECU and immobilizer ECU. This authentication ECU 5 includes a vehicle interior antenna 4a (first transmission means), transmits a question signal to the portable device 1 through the vehicle interior antenna 4a by a spread spectrum system, and via the RF receiver 2. The response signal returned from the portable device 1 is received. Further, when the authentication ECU 5 collates the response signals and agrees (the challenge-response authentication is established), the authentication ECU 5 authenticates the portable device and unsets the immobilizer.

  The engine ECU 12, the steering lock ECU 11, and the authentication ECU 5 are configured to be able to communicate with each other through an in-vehicle LAN (LIN) 14. The body ECU 13 and the authentication ECU 5 can perform local communication through the wiring 15. The body ECU 13 recognizes the open / closed state of the door and controls the lock / unlock of the door. When the door is opened, it is indicated that the door is opened from the body ECU 13 toward the authentication ECU 5.

  The steering lock ECU 11 controls the locking and unlocking of the steering, and performs encrypted communication with the authentication ECU 5 to unlock the steering based on a command from the authentication ECU 5. The engine ECU 12 performs engine control such as engine start, and outputs an engine start permission signal under the immobilization unset condition of the authentication ECU 5. If the user depresses the immobilizer amplifier integrated engine start switch 3 after the engine start is permitted in this way, the engine can be started.

  Next, the operation of the in-vehicle device remote control device and the control mechanism configured as described above will be described. In this in-vehicle device remote control device and control mechanism, first, door unlock control is performed. When the user who has the portable device 1 approaches the vehicle, an interrogation signal is transmitted by a spread spectrum method from the vehicle interior antenna 4a of the LF transmitter 4 of the authentication ECU 5 (or an antenna attached to a door knob (not shown)). When this radio wave is received by the LF receiver 1b in the portable device 1, the LF receiver 1b transmits a question signal to the RF transmitter 1a, and the RF transmitter 1a encrypts the question signal with the unique smart encryption key. Send a response signal.

  When this response signal is received by the RF receiver 2, it is transmitted to the authentication ECU 5 through wiring, and when the response signals are matched and matched, the door ECU 13 is notified of permission to unlock the door. Thereby, the body ECU 13 unlocks the door. When the user opens the door, it is detected by the body ECU 13, and that fact is communicated to the authentication ECU 5.

  When the door is opened and the user presses a push switch or performs an action (act) such as depressing a brake, this act becomes a trigger, and the in-vehicle device remote control device and control The mechanism performs engine start control by repeatedly executing smart communication and immobilizer communication simultaneously in parallel for a predetermined period. These will be described in order. In addition, the code | symbol with the parenthesis shown in the following description is a number corresponding to the flow of each communication shown in FIG.

A) Smart communication (normal communication by the first communication means)
FIG. 2 shows a flowchart of smart communication. When the user who has the portable device 1 enters the vehicle interior, for example, a question signal is transmitted from the authentication ECU 5 to the LF transmitter 4 (1), and the LF transmitter 4 indicates the question signal through the vehicle interior antenna 4a. A radio wave is transmitted by a spread spectrum method (2). When this radio wave is received by the LF receiver 1b in the portable device 1, the LF receiver 1b transmits a question signal to the RF transmitter 1a, and the RF transmitter 1a encrypts the question signal with the unique smart encryption key. A response signal is transmitted (3).

  When this response signal is received by the RF receiver 2, it is transmitted to the authentication ECU 5 through wiring (4), and if the response signal is collated and correct, it is transmitted to the engine ECU 12 and the steering lock ECU 11 that the immobility is unset. . The steering lock ECU 11 performs control to unlock the steering, and an engine start permission signal is output from the engine ECU 12.

  The engine ECU 12 controls the engine to be started when the engine start is in a standby state and the immobilizer integrated engine start switch 3 is pressed by the user. On the other hand, immobilizer communication (communication by the second communication means) is performed in parallel, but communication using the LF charged wave in the smart communication is a spread spectrum system, and therefore can communicate without interfering with the immobilizer communication.

B) Immobility communication (backup communication by the second communication means)
FIG. 3 is a flowchart of immobilizer communication. A signal indicating immobilization question signal transmission is sent from the authentication ECU 5 to the immobilizer amplifier integrated engine start switch 3 through wiring (5). Thereby, the immobilizer amplifier integrated engine start switch 3 sends the radio wave indicating the immobilizer question signal toward the portable device 1 using the immobilizer amplifier coil 3a as an antenna (6). Therefore, when the user brings the portable device 1 close to the immobilizer amplifier integrated engine start switch 3, for example, to a distance of about 10 cm at which the immobilizer amplifier coil 3a can communicate, the portable device 1 receives the radio wave.

  Thereby, the portable device 1 receives the radio wave, and returns a radio wave in the LF band indicating the immobilization response signal from the transponder 1c by the transponder method (7). This radio wave is received by the immobilizer amplifier coil 3a, and an immobilizer response signal is transmitted to the authentication ECU 5 through the wiring (8).

  When the immobilizer response signal is transmitted to the authentication ECU 5 in this way, the authentication ECU 5 determines whether the response signal is correct. If the response signal is correct, it authenticates the portable device and notifies each ECU that the immobilizer is unset. As a result, like the smart communication, the steering lock ECU 12 performs control to unlock the steering. The engine ECU 12 controls the engine to be started when the engine start is in a standby state and the immobilizer integrated engine start switch 3 is pressed by the user.

  When such smart communication and immobilizer communication are repeatedly performed in parallel for a predetermined period and are authenticated as a response signal corresponding to the transmitted smart question signal, or a response signal corresponding to the immobility question signal If the mobile device is authenticated, the mobile device authenticates with the mobile device corresponding to the vehicle, and the communication is terminated.

  The effect by using the on-vehicle equipment remote control device having the above-described configuration and operation will be described. For example, when the portable device 1 is close to the immobilizer amplifier integrated engine start switch 3 when the portable device 1 is close to the immobilizer amplifier integrated engine start switch 3 because the user does not know when the battery 1 runs out or is out of order. If the radio wave indicating the immobilizer ID transmission request from the integrated engine start switch 3 has been transmitted, the radio wave is not received by the portable device 1.

  On the other hand, in the in-vehicle device remote control device according to the first embodiment, since the smart communication transmission from the vehicle side is the spread spectrum communication, even if the smart communication and the immobilizer communication use the LF band, for example. Since the smart communication and the immobilizer communication can be performed in parallel and the transmission is repeatedly performed, the user can operate the mobile device 1 in the same manner as usual except for the operation of bringing the portable device 1 close to the immobilizer amplifier integrated engine start switch 3. it can. If the user brings the portable device 1 close to the immobilizer amplifier-integrated engine start switch 3 at some point where repeated immobilization communication is executed, the portable device 1 receives a radio wave indicating an immobilizer ID transmission request. Become.

  Therefore, even when the portable device 1 is out of battery or broken, when the door is opened and the user presses the push switch or depresses the brake, for example, When the communication is repeatedly executed and the user brings the portable device 1 close to the immobilizer amplifier integrated engine start switch 3, a radio wave indicating an immobilizer ID transmission request is received by the portable device 1, and the immobilizer question signal is transmitted from the portable device 1. If the corresponding response signal can be transmitted and the response signal is verified by the authentication ECU 5 and correct, the immobilizer is unset. That is, if the response signal transmitted by either smart communication or immobilizer communication is verified by the authentication ECU 5 and correct, the immobilizer can be unset. For example, when the portable device 1 has run out of battery or has failed. However, the immobilizer can be unset even if it does not have a dedicated trigger slot required only for backup authentication.

  According to the first embodiment, the first transmission means of the in-vehicle station that transmits the interrogation signal to the portable device, the second reception means of the portable device that receives the interrogation signal, and the second reception means A second transmission unit of the portable device that transmits a response signal to the received interrogation signal; and a first reception unit of an in-vehicle station that receives the response signal transmitted by the second transmission unit. A first communication means for carrying out mutual communication between the portable device and the vehicle-mounted station, and transmitting a query signal from the vehicle-mounted station to generate an electromotive force and transmitting a response signal from the portable device. A communication system between the first transmission unit and the second reception unit. The second communication unit includes a second communication unit that receives the received information from the in-vehicle station and performs mutual communication between the portable device and the in-vehicle station. Is a spread spectrum communication system.

  Therefore, the normal mutual communication of the first communication means and the backup mutual communication of the second communication means can be simultaneously communicated under the conditions for transmitting the first communication means, and a trigger for the backup mutual communication becomes unnecessary. Slots can be abolished. For this reason, it can be set as the vehicle equipment remote control apparatus which can perform immobilization communication authentication (backup communication authentication) reliably. This eliminates the need for troublesome backup communication authentication unless a portable device is inserted into the slot, and allows backup authentication even if the dedicated slot required only for backup authentication is eliminated. It can be set as the vehicle-mounted apparatus remote control apparatus which can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the vehicle equipment remote control apparatus in Embodiment 1 of this invention. 3 is a flowchart illustrating smart communication according to the first embodiment. 3 is a flowchart illustrating immobilization communication according to the first embodiment.

Explanation of symbols

1 Mobile device 1a RF transmitter (second transmitter)
1b LF receiver (second receiver) 1c transponder 2 RF receiver (first receiver)
3 Immobilizer amplifier integrated engine start switch 3a Immobilizer amplifier coil 4 LF transmitter (first transmitter)
5 Authentication ECU 11 Steering lock ECU
12 Engine ECU 13 Body ECU.

Claims (2)

A first transmission unit of the in-vehicle station that transmits an interrogation signal to the portable device, a second reception unit of the portable device that receives the interrogation signal, and a response to the interrogation signal received by the second reception unit The in-vehicle station and the portable device communicate with each other by having a second transmitting means for transmitting the signal and a first receiving means for receiving the response signal transmitted by the second transmitting means. A first communication means for performing authentication of the portable device,
The in-vehicle station transmits an interrogation signal, generates an electromotive force in the portable device, transmits a response signal from the portable device, receives the response signal from the in-vehicle station, and the in-vehicle station and the portable device communicate with each other. A second communication means for authenticating the machine;
In the in-vehicle device remote control device comprising the operation control means for controlling the operation state of the in-vehicle device on condition that authentication is established in any one of the above mutual communication,
A vehicle-mounted device remote control device characterized in that a communication system between the first transmission means and the second reception means is a spread spectrum communication system.   The in-vehicle device remote control device according to claim 1, wherein the mutual communication of the first communication means and the mutual communication of the second communication means are communicated in parallel.

Images