JP2010133181A - Keyless entry system for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry system for an automobile, which enables the opening and closing operations of an opening and closing body of an automobile body to be surely performed even during the working of an engine. <P>SOLUTION: This keyless entry system 10 includes: a communication device 20 which has a vehicle-side transmission means 22 and a vehicle-side reception means 26; a portable communication instrument 30 which has a portable machine-side reception means 31 and a portable machine-side transmission means 36; a lock mechanism 12 of the opening and closing body; an unlocking means 14 for releasing the locked state of the lock mechanism 12 when the vehicle-side reception means 26 receives an electric wave signal; and a motor control means 40. The motor control means 40 comprises: an operation detecting section 42 which detects the opening and closing operations of the opening and closing body; a working detecting section 46 which detects the working of a motor 52 mounted on the automobile body; and a motor control section 48 which inhibits the working of the motor 52, in the detection of the working of the motor 52 and that of the opening and closing operations of the opening and closing body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automobile keyless entry system.

  Conventionally, as a keyless entry system for an automobile, a first keyless entry system described in Patent Document 1 is known. The first keyless entry system includes an automobile communication device disposed in a vehicle and a portable communication device held by an automobile occupant. In the first keyless entry system, the vehicle communication device receives the radio signal transmitted from the portable communication device, and whether or not the ID information attached to the radio signal matches the pre-registered ID information. When it is determined that the two match, the locking and unlocking of the back door or the like by the lock mechanism provided on the back door or the like is switched.

  Thus, since the signal with ID information transmitted from the portable communication device to the communication device of the automobile is a radio wave signal, it is strongly affected by noise generated from the motor in operation. For this reason, if the motor mounted on the vehicle body is operating when the occupant transmits the radio signal from the portable communication device to the automobile communication device in order to open the back door or the like, the radio wave from the portable communication device is activated. In some cases, the communication signal of the automobile cannot receive the radio wave signal because the signal is hindered by noise generated from an operating motor. In such a case, switching from locking to unlocking of the back door or the like is not performed, so that the opening operation of the back door or the like cannot be performed.

  A second keyless entry system described in Patent Document 2 for suppressing transmission and reception of radio signals from a portable communication device to a vehicle communication device by suppressing noise generated from a motor mounted on the vehicle body is provided. Are known.

  This second keyless entry system is a system applied to a vehicle equipped with a vehicle motor antenna that lowers an antenna in an extended state by a motor in conjunction with the ignition off. Specifically, the second keyless entry system further includes a motor control unit in addition to the automobile communication device and the portable communication device similar to the first keyless entry system. The motor control unit stops generation of noise from the motor during this period by stopping the motor for a predetermined time based on the ignition off.

In a vehicle to which the second keyless entry system is applied, when the occupant is turned off when the vehicle is parked, the motor control unit stops the motor for a predetermined time. Transmission / reception of the radio signal transmitted from the portable communication device to the communication device of the vehicle for switching from the lock to the lock is not hindered by the noise of the motor, so that the door is securely locked.
JP 2003-269019 A Japanese Patent Laid-Open No. 9-300961

  In a state where an occupant has entered the vehicle and the engine is operating, for example, an air conditioner for maintaining comfort in the passenger compartment, a motor used for a device for maintaining the state of the engine, and the like are appropriately operating.

  In this way, when the occupant gets off while the engine is in operation, for example, when the back door (opening / closing body) is opened to take out the luggage from the rear luggage compartment, the noise generated by the operation of the motor The radio signal from the portable communication device cannot be received by the communication device of the automobile, and the locked state of the back door is not released, and the back door cannot be opened.

  Therefore, it is conceivable to apply a configuration that suppresses the generation of noise by stopping the motor as in the second keyless entry system, but after the occupant gets off with the engine running. If the motor is stopped until the back door opening operation is performed, the motor continues to stop for a long time, and the comfort of the passenger compartment and the state of the engine may not be maintained.

  In view of the above problems, an object of the present invention is to provide an automobile keyless entry system capable of reliably opening and closing an opening / closing body of a vehicle body even when the engine is operating.

  Accordingly, in order to solve the above problems, the present invention is a keyless entry system for an automobile, and includes a vehicle-side transmission unit that transmits a vehicle-side signal from the inside of the vehicle to the outside of the vehicle, and a vehicle that receives a radio signal transmitted from the outside of the vehicle to the inside of the vehicle. A vehicle communication device having a side receiving means, a portable device receiving means for receiving the vehicle side signal, a portable communication device having a portable device side transmitting means for transmitting the radio wave signal, and an opening / closing body of the vehicle body are locked. A lock mechanism, an unlocking means for releasing the lock state of the lock mechanism when the vehicle-side receiving means receives a radio signal transmitted from the portable device-side transmitting means, and an operation of a motor mounted on the vehicle body Motor control means for controlling, the motor control means for detecting whether or not the opening and closing body is opened and closed from the outside of the vehicle, An operation detection unit that detects whether or not the motor mounted on the body is operating, and when the operation detection unit detects the operation of the motor and the operation detection unit detects the opening / closing operation of the opening / closing body And a motor control unit for prohibiting the operation of the motor.

  According to this configuration, since the operation of the motor is prohibited by the motor control unit by detecting the opening / closing operation of the opening / closing body in the operation detection unit, generation of noise from the motor is suppressed during the opening / closing operation. The transmission and reception of signals (vehicle-side signals and radio wave signals) between the automobile communication device and the portable communication device is not hindered by the noise. Therefore, even when the engine of the automobile is in operation, the locked state of the opening / closing body can be reliably released, and the opening / closing operation of the opening / closing body can be reliably performed.

  Moreover, until the opening / closing operation of the opening / closing body is performed, the operation of the motor is not prohibited, and deterioration of the comfort in the vehicle can be suppressed. Specifically, for example, when the motor is a blower motor for an air conditioner mounted on the vehicle body, the operation of the motor is not prohibited until the opening / closing operation of the opening / closing body is performed. While the deterioration is suppressed, the opening / closing operation of the opening / closing body is reliably performed by prohibiting the operation of the motor when the opening / closing operation is performed. That is, the operation of the blower motor is not prohibited by the motor control unit until the opening / closing operation of the opening / closing body is performed. Therefore, the air conditioner air-conditions the vehicle interior until the opening / closing operation is performed, while the opening / closing body opening / closing operation is performed. During operation, the motor control unit prohibits the operation of the blower motor and suppresses the generation of noise from the motor.

  It is preferable that the motor control unit is configured to cancel the operation prohibition state of the motor after a preset first time has elapsed since the operation of the motor was prohibited. By being configured in this way, it is possible to suppress noise within a time sufficient for transmission and reception of signals between the communication device of the automobile and the portable communication device, and it is possible to suppress the prolonged operation prohibited state of the motor. It becomes.

  When the radio signal transmitted from the portable device-side transmitting means is received by the vehicle-side receiving means before the first time has elapsed, the motor control unit prohibits the operation of the motor from the time of reception. By being configured to cancel the state, it is possible to further shorten the time during which the motor is disabled in accordance with the reception status of the signal between the automobile communication device and the portable communication device.

  The vehicle communication device is configured to transmit a vehicle-side signal from the vehicle-side transmission means after elapse of a preset second time from the time when the motor control unit prohibits the operation of the motor. preferable.

  According to such a configuration, since the vehicle-side transmission unit transmits the vehicle signal after the noise generated due to the inertial rotation of the motor is settled, the transmission of the radio signal from the portable device-side transmission unit is not hindered by the noise. It is possible to suppress wasteful radio wave signal transmission from the portable device side transmission means and suppress power consumption of the portable communication device.

  Specifically, even if the operation of the motor is prohibited, the rotation does not stop immediately due to the inertial force. Therefore, noise is generated from the motor due to the rotation (inertial rotation) from when this operation is prohibited until it stops. Therefore, it is possible to avoid the influence of noise based on the inertial rotation by configuring the vehicle side transmission means to transmit the vehicle side signal after the inertial rotation is stopped or the rotational speed is sufficiently lowered.

  In the case of a configuration in which the vehicle side signal is transmitted after the second time has elapsed, the second time is set to be shorter than the first time, so that the motor operation can be reliably performed within the period. In addition, the vehicle side signal can be transmitted from the vehicle side transmission means to the portable device side reception means.

  The communication device of the automobile transmits the vehicle side signal before the motor operation prohibition control is executed by the motor control means when the opening / closing operation of the opening / closing body is detected by the operation detection unit. The motor control unit detects the opening / closing operation of the opening / closing body by the operation detection unit, and when the radio signal transmitted from the portable device side transmission unit is not received by the vehicle side reception unit, You may comprise so that the action | operation of a motor may be prohibited.

  According to this configuration, unnecessary motor operation prohibition can be avoided. That is, even when the operation of the motor is not prohibited, when the signal can be transmitted and received between the vehicle communication device and the portable communication device, the opening / closing operation of the opening / closing body can be performed without inhibiting the operation of the motor.

  The motor control unit may be configured to apply a braking force for forcibly stopping the operation of the motor. With such a configuration, the inertial rotation of the motor is suppressed, and the generation of noise from the motor based on this inertial rotation is suppressed.

  You may provide the alerting | reporting means which alert | reports that it exists in the state which prohibited the action | operation of the motor by the said motor control part. When such a notification means is provided, the operation of the motor is prohibited, that is, the signal transmission / reception between the communication device of the automobile and the portable communication device is performed, or the stop of the motor fails. It is easy to determine whether or not

  It is preferable that the opening / closing body is a back door for a rear luggage compartment configured to be able to release the locked state of the lock mechanism from the outside by a key operation.

  According to such a configuration, even when the key operation cannot be performed during operation of the engine or the like, the back door can be opened and closed, and a third party other than the passenger holding the portable communication device can perform the opening and closing operation of the back door. Therefore, it is possible to achieve both convenience in use of the cargo room and prevention of theft. Further, since the operation of the motor is prohibited during the opening / closing operation of the bag door and the generation of noise from the motor is suppressed, the vehicle-side receiving means is, for example, the opening / closing operation position of the back door (ie, behind the automobile). Even if it is provided in front of the passenger compartment (near the driver's seat) away from the vehicle, it is possible for the vehicle-side receiving means to receive the radio signal from the portable communication device without being disturbed by noise.

  As described above, according to the present invention, it is possible to provide a keyless entry system for an automobile that can reliably perform an opening / closing operation of an opening / closing body of a vehicle body even when the engine is operating.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating a schematic configuration of an automobile 1 including a keyless entry system (smart keyless entry system) 10 of the automobile 1 according to the present embodiment. FIG. 2 is a block diagram showing a schematic configuration of the blower unit 50 including the keyless entry system 10 of the automobile 1 according to the present embodiment and the blower motor 52 controlled by the keyless entry system. The keyless entry system 10 includes a communication device 20 of the automobile 1 disposed in the vehicle and a portable communication device 30 held by a passenger of the automobile 1. Then, the communication device 20 receives the radio signal transmitted from the portable communication device 30, and it is determined whether or not the ID information attached to the radio signal matches the previously registered ID information. When it is determined, the keyless entry system 10 performs control such as automatically switching between locking and unlocking of the opening / closing body by the lock mechanism 12 provided on the opening / closing body of the vehicle body. ing. Hereinafter, the opening / closing body in the present embodiment is a back door 2 for a rear cargo room, and this back door 2 is a back door by means other than key operation except for the keyless entry system 10. 2 is configured so that the locking and unlocking of the locking mechanism 12 provided in 2 cannot be switched.

  The keyless entry system 10 according to the present embodiment includes a communication device (hereinafter also simply referred to as “communication device”) 20, a portable communication device 30, a lock mechanism 12, a lock release unit 14, a motor control unit 40, and a notification of the automobile 1. Means 16.

  The communication device 20 includes a vehicle side transmission unit 22 and a vehicle side reception unit 26. The vehicle-side transmission means 22 transmits a vehicle-side signal composed of a magnetic field signal in the LF band from the inside of the vehicle to the outside of the vehicle, and has an LF antenna 24. When the vehicle-side transmission unit 22 receives an access signal from the operation detection unit 42 included in the motor control unit 40, the vehicle-side signal instructing a reply of a radio wave signal attached with predetermined ID information is portablely communicated by the LF antenna 24. To the machine 30.

  The vehicle-side receiving means 26 has a UHF receiver 28 in the front part of the passenger compartment, and this UHF receiver 28 receives a UHF band radio signal transmitted from the portable communication device 30 from the outside of the vehicle to the inside of the vehicle. The vehicle-side receiving means 26 determines whether or not the ID information attached to the radio signal from the mobile communication device 30 received by the UHF receiver 28 matches the ID information registered in advance (ID information verification). I do. When the ID information matches, the vehicle side receiving means 26 outputs an output signal and also outputs a release signal.

  The portable communication device 30 includes portable device-side receiving means 31 that receives a vehicle-side signal, a lock / unlock switch 34 that is operated by an occupant, and portable device-side transmission means 36 that transmits a radio signal.

  The portable device side reception means 31 has a magnetic field detection circuit 32, and this magnetic field detection circuit 32 receives the vehicle side signal transmitted from the vehicle side transmission means 22 of the communication device 20.

  The portable device side transmission means 36 performs UHF control circuit 37 for executing control for transmitting a radio wave signal, and UHF transmission for transmitting a radio signal corresponding to the control signal output from the UHF control circuit 37 to the vehicle side reception means 26. Circuit 38. The UHF control circuit 37 is a circuit that executes control for transmitting a radio wave signal corresponding to an output signal of the portable device side receiving means 31 or the lock / unlock switch 34. Specifically, the UHF control circuit 37 uses the portable device-side receiving means 31 to notify that the vehicle-side signal instructing the reply of the radio signal with the ID information is transmitted from the vehicle-side transmitting means 22 of the communication device 20. When the UHF control circuit 37 recognizes the radio signal via the UHF transmission circuit 38 from the portable device-side transmission means 36 to the vehicle-side reception means 26, the control unit executes a control for returning the radio signal with the preset ID information. . Further, the UHF control circuit 37 is a control signal for instructing to switch the state of the lock mechanism 12 provided in the back door 2 to locked or unlocked according to the output signal of the lock / unlock switch 34 operated by the passenger. As a radio signal.

  The lock mechanism 12 locks the back door 2 for the rear cargo compartment, and the lock release means 14 can switch the state of the lock mechanism 12 between locked and unlocked. The unlocking means 14 switches the state of the lock mechanism 12 based on a signal output from the vehicle side receiving means 26. For example, the lock release means 14 releases the lock state of the lock mechanism 12 when receiving a release signal output from the vehicle side reception means 26, and puts it into an unlock state.

  The motor control means 40 controls the operation of the blower motor 52 mounted on the vehicle body, and includes an operation detection unit 42, an operation detection unit 46, and a motor control unit 48.

  The operation detection unit 42 is a part that detects whether or not the back door 2 is opened / closed from outside the vehicle, and includes an access switch 44 provided on the back door 2. The access switch 44 grasps the door handle 3 and operates it so that a passenger such as a driver who gets off from the passenger compartment moves to the rear of the automobile 1 and opens the back door 2. In this case, the access switch 44 provided on the door handle 3 is turned on, and an access signal is output.

  The operation detection unit 46 is a part that detects whether or not the motor mounted on the vehicle body is operating, and outputs a detection signal when the operation of the motor is detected. In the present embodiment, the operation detection unit 46 detects the operation of the blower motor 52 included in the blower unit 50.

  The motor control unit 48 detects the operation of the blower motor 52 by the operation detection unit 46 and detects the opening / closing operation of the back door 2 by the operation detection unit 42 (access switch 44). This is a part that prohibits operation. That is, when the motor control unit 48 receives both the access signal from the operation detection unit 42 and the detection signal from the operation detection unit 46, the motor control unit 48 outputs a control signal for prohibiting the operation of the blower motor 52. The motor control unit 48 is transmitted after a preset first time (5 seconds in the present embodiment) from the point in time when the operation of the blower motor 52 is prohibited, or transmitted from the portable device-side transmission means 36. When the radio signal is received by the vehicle-side receiving means 26 before the first time elapses and the ID information matches, the output of the control signal is stopped from this point. Furthermore, the motor control unit 48 also outputs a control signal for applying a braking force for forcibly stopping the operation of the blower motor 52 together with the control signal. In the present embodiment, the control signal for applying a braking force for forcibly stopping is a control signal for rotating the blower motor 52 in the reverse direction.

  The notification means 16 has a buzzer 18 provided in the back door 2 and is used to notify the occupant by a buzzer sound that the motor control unit 48 has prohibited the operation of the blower motor 52.

  The blower unit 50 includes a blower motor 52 of an air conditioner (not shown) mounted on the front of the vehicle body. Upon receiving a control signal from the motor control unit 48, the blower motor 52 operates based on this control signal. To control. This blower motor is a motor that operates as appropriate when the air conditioner performs air conditioning in the passenger compartment.

  The keyless entry system 10 as described above operates as follows when the opening operation of the back door (opening / closing body) 2 is performed while the engine is operating. This will be described with reference to FIG.

  First, in the operation detection unit 42, it is determined whether or not the state of the access switch 44 of the back door 2, that is, whether or not an opening operation (opening / closing operation) of the back door 2 is being performed. That is, when an occupant such as a driver who gets off from the passenger compartment moves to the rear of the automobile 1 and performs the opening operation of the back door 2 and grips and operates the door handle 3, The access switch 44 detects this operation. The operation detection unit 42 repeats this determination if the state of the access switch 44 is OFF, and if the access switch 44 is ON, the access switch 44 outputs an access signal to the motor control unit 48 (step 1). At this time, the operation detection unit 46 determines whether or not the blower motor 52 is operating for air conditioning of the passenger compartment (step 2), and outputs a detection signal to the motor control unit 48 when operating. To do.

  Upon receiving the access signal from the operation detection unit 42 and the detection signal from the operation detection unit 46, the motor control unit 48 outputs a control signal to the blower unit 50 (step 3). The blower unit 50 that has received this control signal prohibits the operation of the blower motor 52, that is, stops the rotation of the blower motor 52. At this time, the control signal includes a signal for applying a braking force for forcibly stopping the operation of the blower motor 52, that is, a signal for generating a driving force in a direction in which the blower motor 52 rotates in the reverse direction for a short time. Therefore, the inertial rotation (idling) of the blower motor 52 is suppressed, and the rotation is forcibly stopped.

  Next, collation is started as to whether or not the ID information registered in advance in the portable communication device 30 matches the ID information registered in advance in the communication device 20 (step 4). When the ID information matches and the collation is completed, the operation prohibition state of the blower motor 52 is released (steps 5 and 7). Specifically, when the vehicle-side transmission unit 22 of the communication apparatus 20 detects that the motor control unit 48 has output a control signal to the blower unit 50, the vehicle-side transmission unit 22 returns a radio signal with ID information attached thereto. Is transmitted via the LF antenna 24. When the vehicle-side signal is detected by the portable device-side receiving means 31 (magnetic field detecting circuit 32) of the portable communication device 30, the portable device-side transmitting means 36 (UHF transmitting circuit 38) is a radio wave attached with preset ID information. A signal is returned to the vehicle side receiving means 26. When the vehicle-side receiving means 26 of the communication device 20 receives this radio signal, it is determined whether or not the ID information attached to the radio signal matches the ID information registered in advance, and the ID information matches. An output signal indicating completion of collation is output from the vehicle side receiving means 26 to the motor control unit 48, and a release signal is output from the vehicle side receiving means 26 to the lock releasing means 14. Then, the motor control unit 48 that has received this output signal stops outputting the control signal, whereby the blower unit 50 releases the operation prohibition state of the blower motor 52, and the blower motor 52 becomes operable. In addition, the unlocking means 14 that has received the release signal releases the locked state of the lock mechanism 12 of the back door 2, thereby enabling the back door 2 to be opened. In the present embodiment, since the buzzer is sounded by the notification means 16 from the start of collation to the release of the operation prohibition state of the blower motor 52, the occupant performing the opening operation of the back door 2 It is possible to easily recognize that the collation is performed.

  On the other hand, from the time when the operation of the blower motor 52 is prohibited, that is, from the time when the motor control unit 48 starts outputting the control signal until the first time (5 seconds in the present embodiment) elapses, the above collation is performed. If the ID does not end or the ID information does not match, the above collation is repeated until the first time has passed (steps 5 and 6). When the first time elapses, the motor control unit 48 stops outputting the control signal, and the blower motor 52 becomes operable (step 7). In this case, the release signal is not output from the vehicle side receiving means 26 to the lock releasing means 14, whereby the locked state of the lock mechanism 12 is maintained in the back door 2.

  If the operation detection unit 46 cannot detect the operation of the blower motor 52 in step 2, the operation of the blower motor 52 is not prohibited, and the ID information and communication device registered in advance in the portable communication device 30 are not prohibited. Whether or not the ID information registered in advance 20 is the same is started (step 3A). When the ID information matches, a release signal is output from the vehicle side receiving means 26 to the unlocking means 14, and the unlocking means 14 that receives this release signal releases the lock state of the locking mechanism 12 of the back door 2. Thus, the back door 2 can be opened (steps 4A and 5A). On the other hand, when the ID information does not match, no release signal is output from the vehicle side receiving means 26 to the lock releasing means 14, whereby the lock state of the lock mechanism 12 is maintained in the back door 2.

  According to the keyless entry system 10 as described above, the operation of the blower motor 52 is prohibited by the motor control unit 48 when the operation detection unit 42 (access switch 44) detects the opening operation of the back door 2. In the opening operation of the back door 2, the generation of noise from the blower motor 52 is suppressed, and transmission / reception of signals (vehicle-side signals and radio signals) between the communication device 20 and the portable communication device 30 is caused by the noise. I can't interfere. Therefore, even when the engine of the automobile 1 is operating, the locked state of the back door 2 can be reliably released, and the opening operation of the back door 2 can be performed reliably.

  Moreover, according to the keyless entry system 10, the operation of the blower motor 52 is not prohibited until the opening operation of the back door 2 is performed. Therefore, while the air conditioner continues to operate until the opening operation of the back door 2 is performed, the deterioration of the comfort in the vehicle interior is suppressed, and when the opening operation of the back door 2 is performed, the operation of the blower motor 52 is prohibited. As a result, the generation of noise from the motor 52 is suppressed, and the opening operation of the back door 2 is thereby reliably performed.

  Further, according to the keyless entry system 10, the operation prohibition state of the blower motor 52 is canceled after a preset first time has elapsed since the motor control unit 48 prohibited the operation of the blower motor 52. As a result, it is possible to suppress sufficient time noise necessary for transmission / reception of signals between the communication device 20 and the portable communication device 30 (collation of ID information, etc.) and to prevent the operation of the blower motor 52 from being prolonged. It becomes possible to do.

  Further, when the radio signal transmitted from the portable device side transmission means 36 is received by the vehicle side reception means 26 before the first time has elapsed, the motor control unit 48 starts the blower motor 52 from the time of reception. The operation inhibition state of the blower motor 52 is made shorter according to the reception status of the signal between the communication device 20 and the portable communication device 30 by being configured to release the operation inhibition state of the blower. Can do. In other words, immediately after the operation of the blower motor 52 is prohibited (in less than 5 seconds), if transmission / reception of signals between the communication device 20 and the portable communication device 30 is completed, it does not wait for 5 seconds to elapse. Compared with the case where the operation prohibition state of the blower motor 52 is released and the air conditioner operates, and the operation prohibition state of the blower motor 52 is released after 5 seconds, the deterioration of the comfort in the passenger compartment is suppressed. The

  Further, according to the keyless entry system 10, the motor control unit 48 is configured to apply a braking force for forcibly stopping the operation of the blower motor 52. When prohibited, the inertial rotation of the blower motor 52 is suppressed, and the generation of noise from the blower motor 52 based on this inertial rotation is suppressed.

  Further, according to the keyless entry system 10, since the notifying means 16 for notifying that the operation of the blower motor 52 is prohibited by the motor control unit 48 is provided, the operation of the blower motor 52 is prohibited. The operation of opening the back door 2 is performed to determine whether or not a signal is being transmitted, that is, whether or not a signal is being transmitted / received between the communication device 20 and the portable communication device 30 (ID information collation, etc.). A crew member who performs can be easily grasped. That is, when the operation of opening the back door 2 is stopped, the blower motor 52 is in a state where the operation is prohibited for transmission / reception of signals between the communication device 20 and the portable communication device 30, or the blower motor 52 It is possible to easily determine whether the vehicle is stopped due to a malfunction.

  Further, according to the keyless entry system 10, when the occupant holding the portable communication device 30 performs the opening operation of the back door 2, for example, the key is inserted into the key cylinder (the engine is operating). Therefore, even when other key operations cannot be performed, the back door 2 can be opened. In addition, a third party other than the passenger holding the portable communication device cannot perform the opening operation of the back door 2. Therefore, it is possible to achieve both convenience when using the cargo space and prevention of theft.

  Further, since the operation of the blower motor 52 is prohibited during the opening operation of the bag door 2 and the generation of noise from the blower motor 52 is suppressed, the vehicle-side receiving means 26 can open and close the back door 2, for example. Even if it is provided in the front (near the driver's seat) position of the passenger compartment away from the operation position (that is, behind the automobile 1), transmission / reception of signals between the portable communication device 30 and the vehicle-side receiving means 26 is made noise. It is possible to perform without interruption.

  Next, a second embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2. The same reference numerals are used for the same components as those in the first embodiment, and a detailed description is omitted, and only different components are described. This will be described in detail.

  As in the first embodiment, the keyless entry system 10 according to the present embodiment includes a communication device 20, a portable communication device 30, a lock mechanism 12, a lock release unit 14, a motor control unit 40, and a notification unit 16. The communication device 20 according to the present embodiment is configured to transmit a vehicle-side signal from the vehicle-side transmission means 22 after the elapse of a preset second time from when the motor control unit 48 prohibits the operation of the blower motor 52. Is done. The second time is set to be shorter than the first time, and is set between 0.5 seconds and 3 seconds in the present embodiment.

  Such a keyless entry system 10 operates as follows when the opening operation of the back door (opening / closing body) 2 is performed in a state where the engine is operated. This will be described with reference to FIG.

  First, the operation detection unit 42 determines the state of the access switch 44 of the back door 2, and if the access switch 44 is ON, an access signal is output to the motor control unit 48 (step 1). At this time, the operation detection unit 46 determines whether or not the blower motor 52 is operating for air conditioning of the passenger compartment (step 2), and outputs a detection signal to the motor control unit 48 when operating. To do. On the other hand, when the operation detection unit 46 cannot detect the operation of the blower motor 52, the operation of the blower motor 52 is not prohibited, and the ID information registered in advance in the portable communication device 30 and the communication device 20 are stored in advance. Verification of whether or not the registered ID information matches is started (step 3A). When the ID information matches, a release signal is output from the vehicle side receiving means 26 to the unlocking means 14, and the unlocking means 14 that receives this release signal releases the lock state of the locking mechanism 12 of the back door 2. Thus, the back door 2 can be opened (steps 4A and 5A). Further, when the ID information does not match, no release signal is output from the vehicle side receiving means 26 to the lock releasing means 14, whereby the locked state of the lock mechanism 12 is maintained in the back door 2.

  When the motor control unit 48 receives the access signal from the operation detection unit 42 and the detection signal from the operation detection unit 46, the motor control unit 48 outputs a control signal to the blower unit 50 (step 3), and receives the control signal. Stops the rotation of the blower motor 52.

  Whether or not the ID information of the portable communication device 30 and the communication device 20 match after the second time has elapsed since the motor control unit 48 outputs a control signal to prohibit the operation of the blower motor 52. Are started (step 3a and step 4). Specifically, the communication device 20 repeatedly determines whether or not the second time has elapsed from the time when the motor control unit 48 outputs the control signal (step 3a). The vehicle-side signal instructing the return of the radio wave signal to which the ID information is attached is transmitted by the side transmitting means 22, and the verification is started (step 4). When the ID information matches and the collation is completed, the operation prohibition state of the blower motor 52 is released (steps 5 and 7).

  On the other hand, if the collation does not end until the first time elapses after the operation of the blower motor 52 is prohibited, or the ID information does not match, the collation is repeated until the first time elapses. (Step 5 and Step 6). When the first time elapses, the motor control unit 48 stops outputting the control signal, and the blower motor 52 becomes operable (step 7).

  According to the keyless entry system 10 as described above, the communication device 20 is configured to transmit a vehicle-side signal from the vehicle-side transmission means 22 after the second time has elapsed from the time when the operation of the blower motor 52 is prohibited. Thus, after the noise generated by the inertial rotation of the blower motor 52 is settled, the vehicle signal is transmitted from the vehicle-side transmission means 22, and the influence of the noise on the vehicle signal can be suppressed.

  Specifically, even if the motor control unit 48 prohibits the operation of the blower motor 52, the blower motor 52 does not stop immediately but rotates inertially, and noise is generated from the blower motor 52 during this time. This noise becomes weaker as the inertial rotation is reduced as time passes. Accordingly, the communication device 20 is configured so that the vehicle-side transmission means 22 can transmit the vehicle-side transmission means 22 in a state where the rotation speed of the inertial rotation is reduced and the noise is sufficiently weakened due to the passage of the second time or the inertial rotation is stopped and no noise is generated. By transmitting the signal, the vehicle-side signal can be transmitted to the portable communication device 30 without being disturbed by noise. In addition, since the second time (0.5 to 3 seconds) is set to be shorter than the first time (5 seconds), the vehicle side transmission is reliably performed within the period in which the blower motor 52 is in the operation-inhibited state. A vehicle side signal is transmitted from the means 22 to the portable device side receiving means 31.

  Further, the transmission of the radio signal from the portable device side transmission means 36 is also performed during the period in which the blower motor 52 is in the operation-inhibited state, so that it is not hindered by the noise. It is also possible to suppress power consumption of the portable communication device 30 by suppressing signal transmission.

  Next, a third embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2, but the same reference numerals are used for the same configurations as those in the first or second embodiment, and detailed descriptions are omitted. Only the configuration will be described in detail.

  Similar to the first and second embodiments, the keyless entry system 10 according to the present embodiment includes a communication device 20, a portable communication device 30, a lock mechanism 12, a lock release unit 14, a motor control unit 40, and a notification unit 16. .

  The communication device 20 according to the present embodiment has a blower motor by the motor control means 40 when the operation detection unit 42 detects an opening operation of the back door 2, that is, when an access signal is received from the access switch 44. The vehicle-side signal is transmitted from the vehicle-side transmission means 22 before the operation prohibiting control 52 is executed.

  The motor control unit 48 included in the motor control unit 40 of the present embodiment is configured such that the operation detection unit 42 detects the opening operation of the back door 2 and the radio signal transmitted from the portable device side transmission unit 36 is a vehicle side reception unit. The control signal for prohibiting the operation of the blower motor 52 is output when the state is not received by the H.26. That is, unlike the first and second embodiments, the motor control unit 48 can receive both the access signal from the operation detection unit 42 and the detection signal from the operation detection unit 46, even if the vehicle side reception unit 26. If the radio signal can be received and the ID information can be verified, the operation of the blower motor 52 is not prohibited.

  Such a keyless entry system 10 operates as follows when the opening operation of the back door (opening / closing body) 2 is performed in a state where the engine is operated. This will be described with reference to FIG.

  First, the operation detection unit 42 determines the state of the access switch 44 of the back door 2, and if the access switch 44 is ON, an access signal is output to the motor control unit 48 (step 1).

  Next, collation is started as to whether or not the ID information of the portable communication device 30 matches the ID information of the communication device 20 (step 4). When the ID information matches and the collation is completed, the release signal is output from the vehicle side receiving means 26 to the lock releasing means 14 without inhibiting the operation of the blower motor 52. The lock release means 14 that has received this release signal releases the lock state of the lock mechanism 12 of the back door 2, and thereby the back door 2 is opened (step 5A). Further, when the ID information is inconsistent and the above collation is finished, no release signal is output from the vehicle side receiving means 26 to the lock releasing means 14, whereby the locked state of the lock mechanism 12 is maintained in the back door 2. The

  On the other hand, when the ID information cannot be verified between the communication device 20 and the portable communication device 30, the operation detection unit 46 determines whether the blower motor 52 is operating for air conditioning of the passenger compartment. (Step 2) If it is operating, a detection signal is output to the motor control unit 48. If the operation detection unit 46 cannot detect the operation of the blower motor 52, the ID information cannot be collated due to causes other than noise generated by the blower motor 52, and the process ends outside the flow.

  When the motor control unit 48 receives the detection signal together with the access signal, the motor control unit 48 outputs a control signal to the blower unit 50 (step 3), and the blower unit 50 that has received this control signal stops the rotation of the blower motor 52.

  Then, when the rotational speed of the blower motor 52 is sufficiently reduced or stopped, the noise is sufficiently weakened or eliminated, so that the above-described collation subsequent to the step 3 is performed satisfactorily. When the collation is completed, the operation prohibition state of the blower motor 52 is released (steps 5 and 7).

  In addition, although the operation of the blower motor 52 is prohibited and the noise is sufficiently weakened or eliminated, the above-described period from when the operation of the blower motor 52 is prohibited until the first time elapses is described. If the verification is not completed or the ID information does not match, the verification is repeated until the first time has passed (steps 5 and 6). When the first time elapses, the motor control unit 48 stops outputting the control signal, and the blower motor 52 becomes operable (step 7).

  According to the keyless entry system 10 as described above, when the communication device 20 detects the opening operation of the back door 2 by the operation detection unit 42, the motor control unit 40 performs the operation prohibition control of the blower motor 52. The motor control unit 48 operates the blower motor 52 when the vehicle side signal is transmitted before the radio signal transmitted from the portable device side transmission means 36 is not received by the vehicle side reception means 26. By being configured to prohibit, unnecessary prohibition of the operation of the blower motor 52 can be avoided. That is, if the signal transmission / reception between the communication device 20 and the portable communication device 30 is possible even if the operation of the blower motor 52 is not prohibited, the back door is not prohibited without the operation of the blower motor 52 being prohibited. 2 can be opened.

  The keyless entry system of the present invention is not limited to the first to third embodiments, and various changes can be made without departing from the scope of the present invention.

  For example, the motor whose operation is controlled by the motor control means 40 is not limited to the blower motor 52, and may be a fan motor 52a or a wiper motor 52b of the radiator R. That is, a motor that is operating to maintain the comfort of the passenger compartment and the state of the engine while the engine is operating, and may not be able to maintain the comfort and the state of the engine if it is stopped for a long time. If it is.

  Further, the opening / closing body is not limited to the back door 2 for the rear luggage compartment, and may be a door 4 that is opened / closed when a passenger gets on or off the vehicle. Moreover, it is not necessary to provide a notification means.

  The motor control unit 48 may apply a braking force using a short circuit of a terminal or a brake mechanism. Moreover, the structure which provides the braking force for forcibly stopping the operation | movement of a motor may not be sufficient. That is, it may be configured to wait for the motor to stop naturally without forcibly stopping it even if the motor rotates inertially.

The schematic block diagram of the motor vehicle provided with the keyless entry system which concerns on 1st Embodiment is shown. The block diagram of schematic structure of the keyless entry system which concerns on the embodiment is shown. The flow at the time of opening operation of the back door during engine operation in the keyless entry system concerning the embodiment is shown. The flow at the time of opening operation of the back door during the engine operation in the keyless entry system concerning a 2nd embodiment is shown. The flow at the time of opening operation of the back door during engine operation in the keyless entry system concerning a 3rd embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Keyless entry system 12 Lock mechanism 14 Lock release means 20 Automobile communication device 22 Vehicle side transmission means 26 Vehicle side reception means 30 Portable communication device 31 Portable device side reception means 36 Portable device side transmission means 40 Motor control means 42 Operation detection unit 46 Operation Detection Unit 48 Motor Control Unit 52 Blower Motor (Motor)

Claims (10)

A keyless entry system for automobiles,
A vehicle communication device having vehicle-side transmission means for transmitting a vehicle-side signal from the inside of the vehicle to the outside of the vehicle and a vehicle-side reception means for receiving a radio signal transmitted from the outside of the vehicle to the inside of the vehicle;
A portable communication device having portable device side receiving means for receiving the vehicle side signal and portable device side transmitting means for transmitting the radio wave signal;
A lock mechanism for locking the opening / closing body of the vehicle body;
Unlocking means for releasing the lock state of the locking mechanism when the vehicle-side receiving means receives a radio signal transmitted from the portable device-side transmitting means;
Motor control means for controlling the operation of a motor mounted on the vehicle body,
The motor control means includes an operation detection unit that detects whether the opening / closing body is opened / closed from the outside of the vehicle, and an operation detection unit that detects whether the motor mounted on the vehicle body is operating. And a motor control unit that prohibits the operation of the motor when the operation detection unit detects the operation of the motor and the operation detection unit detects the opening / closing operation of the opening / closing body. Keyless entry system for automobiles.   The keyless entry system for an automobile according to claim 1, wherein the motor is a blower motor for an air conditioner mounted on the vehicle body.   The said motor control part is comprised so that the operation prohibition state of the said motor may be cancelled | released after progress of the preset 1st time from the time of prohibiting the operation | movement of the said motor. Keyless entry system for automobiles described in 1.   When the radio signal transmitted from the portable device-side transmitting means is received by the vehicle-side receiving means before the first time has elapsed, the motor control unit is in a state where the operation of the motor is prohibited from the time of reception. The keyless entry system for an automobile according to claim 3, wherein the keyless entry system is configured to release the key.   The vehicle communication device is configured to transmit a vehicle-side signal from the vehicle-side transmission means after elapse of a preset second time from the time when the motor control unit prohibits the operation of the motor. The keyless entry system for automobiles according to claim 3 or 4, characterized by the above-mentioned.   6. The keyless entry system for an automobile according to claim 5, wherein the second time is set to be shorter than the first time. The vehicle communication device transmits the vehicle side signal before the motor operation prohibition control is executed by the motor control means when the opening / closing operation of the opening / closing body is detected by the operation detection unit,
The motor control unit detects the opening / closing operation of the opening / closing body by the operation detection unit, and when the radio signal transmitted from the portable device side transmission unit is not received by the vehicle side reception unit, 5. The keyless entry system for an automobile according to any one of claims 1 to 4, wherein the system is configured to prohibit the operation of the motor.   8. The keyless entry of an automobile according to claim 1, wherein the motor control unit is configured to apply a braking force for forcibly stopping the operation of the motor. 9. system.   The vehicle keyless entry system according to any one of claims 1 to 8, further comprising notification means for notifying that the motor control unit is in a state in which operation of the motor is prohibited. 10. The rear door according to claim 1, wherein the opening / closing body is a back door for a rear luggage compartment configured to be able to release the locked state of the locking mechanism from the outside by a key operation. Keyless entry system for cars.

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