JP2008063869A - Keyless device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless device for a vehicle capable of fully coping with a case of the occurrence of overlap of an detection area with other vehicles. <P>SOLUTION: The keyless device 1 for the vehicle is constituted to transmit to a portable unit 2 from an on-vehicle unit 3 provided at the vehicle, to send a reply signal to the on-vehicle unit 3 from the portable unit 2 upon receiving transmission from the on-vehicle unit 3 and to perform ID authentication by communication to lock/unlock a vehicle door without key operation. The on-vehicle unit 3 comprises processing of steps S1-S4 of estimating transmission timing and a transmission cycle to the portable unit from an on-vehicle unit of the other vehicle upon receiving a signal from the portable unit of the other vehicle and processing of steps S5-S9 of carrying out transmission to the portable unit 2 by shifting so as not to overlap with the estimated transmission timing of the other vehicle. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a keyless device for a vehicle in which a portable device held by a person using the vehicle and an in-vehicle device mounted on the vehicle authenticate by communication, and mainly lock and unlock the vehicle door without key operation. It belongs to the technical field.

Conventionally, a stimulation sequence (challenge signal) consists of a first telegram part and a second telegram part having an identifier of the protection device, and the protection device is located in a predetermined range of the transmitter of the transmission device by the first telegram part. A radio key suitable for each is activated at different times during the transmission of the second telegram part due to the mutually offset transmission of the response signals (response signals), and the control device determines the appropriate radio based on the response signals. A key is selected from a wireless key and a selection signal is transmitted. This selection signal causes the selected wireless key to transmit an enable signal (see, for example, Patent Document 1).
JP 2000-320212 A (page 2-7, full view)

In the case where the conventional method for the operation of the protection device is adopted in a keyless device for a vehicle, a challenge signal and a response signal, and a selection signal and an enable signal are exchanged between the portable device and the in-vehicle device. Become.
However, in the conventional communication method, the countermeasure when the detection area overlaps with another vehicle occurs is not sufficient and is a problem.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a vehicular keyless device that can sufficiently take measures when a detection area overlaps with another vehicle. .

  In order to achieve the above object, in the present invention, an in-vehicle device provided in a vehicle transmits to a portable device, and when the portable device receives a transmission from the in-vehicle device, a reply signal is sent to the in-vehicle device, and ID authentication is performed by communication. In a vehicle keyless device that performs locking and unlocking of a vehicle door without performing a key operation, when the in-vehicle device receives a signal from a portable device of another vehicle, transmission to the portable device by the in-vehicle device of the other vehicle Other vehicle transmission estimation means for estimating the timing and transmission cycle, and transmission change means for transmitting to the portable device while shifting so as not to overlap with the estimated transmission timing of the other vehicle.

  Therefore, in the present invention, sufficient countermeasures can be taken when the detection area overlaps with another vehicle, and communication for the keyless function can be performed satisfactorily.

  Hereinafter, an embodiment for realizing a vehicle keyless device according to the present invention will be described based on Examples 1 and 2 corresponding to the inventions according to claims 1 to 3.

First, the configuration will be described.
FIG. 1 is a block diagram of a vehicle keyless device according to a first embodiment.
The keyless device 1 for a vehicle according to the first embodiment mainly includes a portable device 2 and an in-vehicle device 3.
The portable device 2 mainly includes a control unit 21, an RF transmission unit 22, a transmission antenna 23, an LF reception unit 24, a reception coil 25, and a display 26.

  The control unit 21 stores an ID code that is identified for each vehicle, and determines that the signal by the search radio wave processed by the LF reception unit 24 corresponds to the ID code of the own device, or the user When a request operation is performed on the vehicle or the portable device 2 and a search radio wave is transmitted from the vehicle side and received, and it is determined that the signal by the search radio wave corresponds to the ID code of the own device, the ID code Is output to the RF transmitter 22. In addition, reception strength determination processing is performed as necessary.

The RF transmission unit 22 converts the signal indicating the ID code from the control unit 21 into a radio wave signal to be transmitted and outputs it to the antenna 23.
The antenna 23 transmits a radio wave signal from the RF transmission unit 22.
The LF receiving unit 24 converts the search radio wave from the receiving coil 25 into a signal that can be processed by the control unit 21 and outputs the signal to the control unit 21.
The receiving coil 25 receives the search radio wave from the in-vehicle device 3 and sends the received radio wave signal to the LF receiver 24.
The display 26 displays the state, operation state, and the like of the vehicle keyless device 1 and provides useful information to the user.

  The in-vehicle device 3 includes a control unit 31, an LF transmission unit 32, an RF reception unit 33, door opening / closing input units 34, a lock state input unit 35, a lock output unit 36, an unlock output unit 37, and outdoor antenna output units 38 to 40. The indoor antenna output units 41 to 43, the reception antenna 44, the outdoor antennas 45 to 47, the indoor antennas 48 to 50, and the request input unit 51 are the main components.

  The control unit 31 processes input information from each door opening / closing input unit 34 and lock state input unit 35 and information from the portable device 2 input from the RF receiving unit 33 for transmission to the portable device 2. The output to the LF transmitter 32, the output to the lock output unit 36, and the unlock output unit 37 are controlled. Further, it is assumed that the control unit has a built-in memory for temporarily storing data or is connected to a memory provided outside.

  The LF transmission unit 32 converts the search signal from the control unit 31 to search for a specific portable device 2 corresponding to the vehicle into a radio signal that can be transmitted, and outputs the outdoor antenna output units 38 to 40 and the indoor antenna output units 41 to 41. Output to 43.

The RF reception unit 33 receives a radio signal indicating the ID code of the portable device 2 from the reception antenna 44, converts it into a signal that can be processed by the control unit 31, and outputs the signal.
Each door opening / closing input unit 34 inputs information on the opening / closing state of each door from the vehicle, and outputs the information to the control unit 31.
The lock state input unit 35 inputs information on the door lock / unlock state of the vehicle from the vehicle and outputs the information to the control unit 31.

The lock output unit 36 outputs a command signal for locking the door to a vehicle locking device (not shown) according to a command from the control unit 31.
The unlock output unit 37 outputs a command signal for releasing the door lock to a vehicle locking device (not shown) according to a command from the control unit 31.

The outdoor antenna output units 38 to 40 output radio signals to the outdoor antennas 45 to 47.
The indoor antenna output units 41 to 43 output radio signals to the indoor antennas 48 to 50.
The outdoor antennas 45 to 47 transmit radio wave signals to the outside of the vehicle.
The indoor antennas 48 to 50 transmit radio signals to the vehicle interior.
The request input unit 51 receives an input of a request switch provided in the vehicle from the vehicle and outputs the request switch to the control unit 31.

Next, the operation will be described.
[Overlapping detection areas with other vehicles]
Here, overlapping of detection areas with other vehicles will be described.
In recent vehicles, a function associated with a keyless device is increasingly provided.
For example, when a portable device is approached to the vehicle, a proof installed in the vehicle is turned on to illuminate the user's feet, and so on.
In order to satisfactorily establish such a function, the communication distance between the in-vehicle device and the portable device of the vehicle must be increased.

However, this increase in communication distance causes overlapping of detection areas of other vehicles.
If the detection areas of other vehicles overlap, the interference of the signals transmitted from the vehicle for detecting the portable device, or the detection of the detection signal from the own vehicle because the portable device is analyzing the detection signal of the other vehicle. A communication failure such that analysis cannot be performed (detection failure of the portable device) occurs, and a phenomenon that the position of the portable device cannot be detected occurs and becomes a problem.
The keyless device for a vehicle according to the first embodiment solves these problems.

[Interference countermeasure processing]
FIG. 2 is a flowchart showing the flow of interference processing executed by the control unit 31 of the in-vehicle device 3 of the vehicle keyless device according to the first embodiment. Each step will be described below.

  In step S1, it is determined whether or not a radio signal has been received from a portable device of another vehicle. If received, the process proceeds to step S2, and if not received, the process ends.

  In step S2, it is determined whether or not the reception of the radio signal from the portable device of the other vehicle has been received a plurality of times. If it has reached a plurality of times, the process proceeds to step S3. .

  In step S3, it is determined whether or not the reception of the radio signal from the portable device of the other vehicle is regular. If it is regular, the process proceeds to step S4, and if not, the process is terminated.

In step S4, processing for analyzing the transmission timing and transmission cycle of the radio signal from the portable device of the other vehicle is performed.
If the transmission timing and transmission cycle cannot be estimated by this analysis process, the process ends.

  In step S5, the transmission timing of the detection signal by the in-vehicle device of the host vehicle is compared with the estimated transmission timing of the other vehicle obtained by the analysis process.

  In step S6, it is determined whether or not the difference between the transmission timing of the in-vehicle device of the host vehicle and the estimated transmission timing of the other vehicle is within a predetermined T1sec. If it is within T1sec, the process proceeds to step S7. Exit.

  In step S7, the process proceeds to step S8 so as to perform processing of waiting for T2 seconds from the transmission timing of the other vehicle for transmission of the detection signal of the own vehicle.

  In step S8, it is determined whether T2sec has elapsed. If T2sec has elapsed, the process proceeds to step S9, and if T2sec has not elapsed, the process returns to step S8 to wait.

  In step S9, a detection signal is output to the portable device of the own vehicle.

[Action to prevent interference]
First, the interference state in the conventional state will be described.
FIG. 3 is an explanatory diagram of an interference state that occurs in a conventional vehicle keyless device.
Here, it is assumed that two vehicles equipped with an in-vehicle device of a vehicle keyless device are a vehicle A and a vehicle B, and communicate with the portable device A1 and the portable device B1, respectively.
The range detected by the vehicle-mounted device of the vehicle A is set as the detection range 60, the range detected by the vehicle-mounted device of the vehicle B is set as the detection range 70, and the region where the detection ranges 60, 70 of the vehicle A and the vehicle B overlap is an interference area. 80.
A detection signal for detecting the portable device from the in-vehicle device is transmitted at a constant cycle, and the portable device transmits a reply signal at a constant cycle in response to the detection signal.

In the conventional vehicle keyless device, as shown in FIG. 3 (a), when the vehicle A and the vehicle B are positioned side by side, the interference in which the communication range overlaps between the vehicle A and the vehicle B. Area 80 is generated.
Here, it is assumed that the portable device B1 corresponding to the vehicle B is located in the interference area 80 where the vehicle A and the vehicle B overlap.

Then, originally, the portable device B1 should transmit a reply signal to the detection signal transmitted from the vehicle B, but due to the detection signal interference from the vehicle, the portable device B1 cannot receive a normal signal, Do not send a reply to the vehicle.
Therefore, although the portable machine B1 is carried and approached with respect to the vehicle provided with the keyless apparatus for vehicles, the malfunction that a door lock is not cancelled | released will generate | occur | produce.

Next, the case of the vehicle keyless device according to the first embodiment will be described.
4-6 is explanatory drawing of the interference prevention operation | movement in the keyless apparatus for vehicles of Example 1. FIG. FIG. 7 is a time chart showing the state of other vehicle transmission timing, transmission cycle estimation, and change of the transmission timing of the host vehicle in the vehicle keyless device of the first embodiment.
When the vehicles A and B are positioned side by side, an interference area 80 is generated between the vehicles A and B. On the other hand, when a person with the portable device B1 enters the interference area 80, in most cases, the person enters the detection range 70 of the vehicle B other than the interference area 80 first. Then, since the portable device B1 is only in the reach of the detection signal from the vehicle B, it receives only the detection signal from the vehicle B (see FIGS. 4A and 4B).

  Next, when the portable device B1 receives the detection signal from the vehicle B, the portable device B1 transmits a reply signal. Then, the vehicle-mounted device 3 of the vehicle A that is the reach range of this reply signal also receives this signal (see FIGS. 5 (a) and 5 (b)). This is because the reply signal from the portable device B1 uses the RF band having a relatively long reach, and not only the vehicle B but also the surrounding vehicle A can be received.

Here, the vehicle-mounted device 3 of the vehicle A performs the processing shown in FIG. 2 described above with respect to reception of the return signal of the portable device B1 which is a portable device of another vehicle.
The control unit 31 of the in-vehicle device 3 of the vehicle A receives the signal of the portable device B1 that is another vehicle (step S1 → S2, see FIG. 7A).
And this reception is carried out a plurality of times (step S2), and when it is periodic (step S3), the other vehicle detection signal is analyzed and estimated (step S4, see FIGS. 7B and 7C).

In this estimation, as shown in FIG. 7, the transmission / reception delay time is estimated from the reception signal of the portable device B1 received by the vehicle-mounted device 3 of the vehicle A, and the transmission timing and transmission cycle of the transmission signal of the portable device B1 are first determined. Estimation is performed (see FIGS. 7A and 7B).
Next, the transmission timing and transmission cycle of the detection signal of the vehicle-mounted device of the vehicle B are further estimated from the estimated transmission timing and transmission cycle of the transmission signal of the portable device B1. In this case, the estimation is performed based on the time required for transmission / reception from the time when the vehicle-mounted device 3 transmits to the time when the portable device 2 returns and the time required for processing (see FIGS. 7B and 7C).

As described above, when the transmission timing and transmission cycle of the detection signal of the other vehicle (vehicle B) are estimated, the transmission timing of the detection signal of the own vehicle (vehicle A) is compared with the transmission cycle by the process of step S5. Do.
In this case, since the transmission cycle of the own vehicle and the other vehicle is substantially the same, processing is performed so that only the transmission timing is changed by the following processing.
Then, it is determined whether or not the timing difference between the own vehicle (vehicle A) and the other vehicle (vehicle B) is within a predetermined T1 sec (step S6). T1 is a time when it can be determined that interference occurs due to duplication of transmission when the timing difference is within that time.

If the transmission timing difference is within T1, transmission is performed by shifting the transmission timing of the detection signal by the in-vehicle device of the own vehicle (vehicle A) by a predetermined T2sec by the processing of steps S7 to S9. The transmission signal is transmitted so as not to overlap with the detection signal of the other vehicle (vehicle B) (see FIG. 7D).
As a result, even if the portable device B1 is located in the interference area 80 where the detection range overlaps, the detection signal does not actually interfere due to the transmission timing shift, so communication with the in-vehicle device is performed without any problem, and the door lock Release etc. can be performed.
Similarly, even after the portable device A1 comes to be located in the interference area 80 where the detection range overlaps, the detection signal does not interfere due to a transmission timing shift, so communication with the in-vehicle device without any problem, The door lock can be released.

After that, when there is no reception from the portable device B1, it can be seen that there is no reception a plurality of times within a predetermined time in the processing of steps S1 to S3. In this case, the processing for returning the transmission timing is performed. Do.
In the above case, the transmission timing is changed. However, depending on the transmission timing and transmission cycle of the other vehicle, the transmission cycle may be changed, or both the transmission timing and the transmission cycle may be changed. . That is, what is necessary is just to change so that it may not overlap with transmission of the detection signal by the vehicle equipment of another vehicle.

Next, the effect will be described.
In the vehicle keyless device according to the first embodiment, the following effects can be obtained.
(1) The in-vehicle device 3 provided in the vehicle transmits to the portable device 2, and when the portable device 2 receives the transmission from the in-vehicle device 3, the portable device 2 sends a reply signal to the in-vehicle device 3, and performs ID authentication by communication to perform key authentication. In the vehicle keyless device 1 that locks and unlocks the vehicle door without operation, when the vehicle-mounted device 3 receives a signal from the portable device of another vehicle, the transmission timing of the vehicle-mounted device of the other vehicle to the portable device Since it includes the processing of steps S1 to S4 for estimating the transmission cycle and the processing of steps S5 to S9 for transmitting to the portable device 2 so as not to overlap with the estimated transmission timing of the other vehicle, the detection area for the other vehicle Therefore, it is possible to take sufficient measures against the occurrence of duplication, and to perform communication for the keyless function satisfactorily.

In other words, the keyless device for a vehicle according to the first embodiment secures the communication between the portable device of the other vehicle and the in-vehicle device by intentionally delaying the communication of the own vehicle, and quickly terminates the communication of the own vehicle. Is to be secured early.
When the transmission timing is changed and the transmission cycle is changed, it is changed by waiting for transmission.
If communication is not established due to interference, re-challenges will be repeated, and both will not be able to secure communication and will not end. In the first embodiment, the communication of the own vehicle is intentionally delayed so that the communication is ensured at an early stage including other vehicles, thereby shortening the communication.
This can be said to have an effect of improving the communication environment between the in-vehicle device and the portable device.
In addition, it is not necessary to add a circuit for that purpose, or even if it is provided, there are very few points. Therefore, it is advantageous in terms of cost reduction and easy adoption in practice.

  (2) Other vehicle transmission is estimated by estimating the transmission timing and transmission cycle of the portable device (B1) of the other vehicle from the received reception timing and reception cycle of the portable device (B1) of the other vehicle. ) And the estimated transmission timing and transmission cycle of the portable device (B1) of the other vehicle, and the processing shown in FIG. 7 (c) for estimating the transmission timing and transmission cycle of the on-vehicle device of the other vehicle. The transmission timing and transmission cycle of other vehicles can be estimated with little additional configuration, and the transmission timing and transmission cycle of the on-vehicle device of the own vehicle is appropriately changed to enable the communication of the own vehicle. It is possible to reliably enable communication that prevents the above-described problem.

  (3) The transmission change process of the in-vehicle device 3 is the transmission timing to the portable device (A1) of the own vehicle when the signal from the portable device (B1) of the other vehicle is not received a plurality of times within a predetermined time. If the state in which interference occurs is resolved, it is possible to return to a good communication state between the in-vehicle device 3 of the own vehicle and the portable device 2 quickly, so that a more optimal communication environment can be obtained. Can be.

The second embodiment is an example in which the transmission cycle of the other vehicle is different from the transmission cycle of the own vehicle, and both the transmission cycle and the transmission timing of the own vehicle are changed in order to avoid an interference state.
Since the configuration is the same as that of the first embodiment, the description thereof is omitted.

The operation will be described.
[Interference countermeasure processing]
FIG. 8 is a flowchart showing the flow of interference processing executed by the control unit 31 of the in-vehicle device 3 of the vehicle keyless device according to the first embodiment. Each step will be described below. In addition, about the process similar to the flowchart shown in FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In step S10, the transmission timing and transmission cycle without interference are calculated from the comparison result of the transmission timing and transmission cycle of the other vehicle performed in step S5 with the transmission timing and transmission cycle of the own vehicle.

  In step S11, transmission is waited until the calculated transmission timing at which interference does not occur and the timing for changing to the transmission cycle.

[Action to prevent interference]
In the vehicle keyless device of the second embodiment, the processes of steps S1 to S9 shown in FIG. 2 are performed as in the first embodiment. However, the processes of steps S10 and S11 are different, and in the first embodiment, the transmission cycle is changed. Although it is not necessary and only the transmission timing is changed, in the second embodiment, the transmission timing and the transmission cycle are changed.

FIG. 9 is a time chart showing the state of the other vehicle transmission timing, the estimation of the transmission cycle, and the change of the transmission timing of the own vehicle in the vehicle keyless device of the second embodiment.
In the second embodiment, for the sake of explanation, this time, a person with the portable device A1 approaches the crosstalk area 80 of the vehicle B and the vehicle A, and the portable device A1 is detected only in the arrival area of the detection signal from the vehicle A. A process when a signal is received, a reply signal is transmitted in response thereto, and the vehicle B receives a reply signal from the portable device A1 will be described.

The following process is performed in step S4 shown in FIG.
First, the in-vehicle device 3 of the vehicle B estimates the transmission timing t1 of the portable device A1 from the reception timing of the signal from the portable device A1 (see FIG. 9B).
Next, the transmission timing t2 of the detection signal by the in-vehicle device of the vehicle A is estimated from the estimated transmission timing of the portable device A1 (see FIG. 9C).
And the transmission cycle t3 of the detection signal from the vehicle A is estimated by receiving the signal from the portable device A1 a plurality of times (see FIG. 9 (d)).

Then, the transmission timing t2 and transmission cycle t3 estimated by the other vehicle (vehicle A) are compared with the transmission timing and transmission cycle of the host vehicle (vehicle B) in the process of step S5.
Next, by the process of step S10, from the comparison result in step S5, the transmission timing t2 of the detection signal transmitted from the vehicle A to the portable device A1, the transmission timing (t4) that does not match (interference) with the transmission cycle t3, the transmission Calculate the period.
In other words, this processing does not overlap with the portable device detection signal transmitted from the vehicle-mounted device of the vehicle A, and the reply signal of the portable device of the own vehicle (vehicle B) does not overlap with the transmission signal of the portable device A1. In this timing and cycle, that is, in the range of TE in the range shown in FIGS. 9TA to TE, settings related to transmission are performed so that the own vehicle (vehicle B) transmits the portable device detection signal.

Then, in the process of step S11, after the start of transmission, transmission is performed at the calculated interference avoidance timing and cycle (step S9).
As a result, even if the portable device A1 is located in the interference area 80 where the detection range overlaps, the detection signal does not actually interfere due to a transmission timing or transmission period deviation, so communication with the in-vehicle device is performed without any problem. The door lock can be released.
Further, the operation of returning the transmission timing and the transmission cycle when the portable device A1 of the other vehicle stops communicating with the other vehicle is the same as that of the first embodiment.
Since other operations are the same as those of the first embodiment, description thereof is omitted.

Explain the effect. The vehicle keyless device according to the second embodiment has the following effects.
(1) 'The vehicle-mounted device 3 provided in the vehicle transmits to the portable device 2, and when the portable device 2 receives the transmission from the vehicle-mounted device 3, it sends a reply signal to the vehicle-mounted device 3, and performs ID authentication by communication. In the vehicle keyless device 1 that locks and unlocks the vehicle door without key operation, when the vehicle-mounted device 3 receives a signal from the portable device of another vehicle, the transmission timing to the portable device by the vehicle-mounted device of the other vehicle Steps S1 to S4 for estimating the transmission cycle and steps S5, S9, S10, and S11 for performing transmission to the portable device 2 so as not to overlap with the estimated transmission timing of other vehicles. The countermeasure when the detection area overlaps with the car is sufficient, and communication for the keyless function can be performed satisfactorily.

  (2) 'Other vehicle transmission is estimated by estimating the transmission timing and transmission cycle of the portable device (A1) of the other vehicle from the received reception timing and reception cycle of the portable device (A1) of the other vehicle. It includes the process shown in FIG. 9 (c) for estimating the transmission timing and transmission cycle of the in-vehicle device of the other vehicle from the processing shown in b) and the estimated transmission timing and transmission cycle of the portable device (A1) of the other vehicle. Therefore, with little additional configuration, the transmission timing and transmission cycle of other vehicles can be estimated, and the transmission timing and transmission cycle of the in-vehicle device of the own vehicle are appropriately changed to enable communication of the own vehicle, It is possible to reliably enable communication that prevents interference.

  (3) 'Transmission change processing of the in-vehicle device 3 is transmitted to the portable device (B1) of the own vehicle when the signal from the portable device (A1) of the other vehicle is not received a plurality of times within a predetermined time. If the state where interference occurs is resolved because the timing is returned, the optimal communication can be achieved by quickly returning to a good communication state between the in-vehicle device 3 of the own vehicle and the portable device 2 set in advance. Can be in the environment.

As mentioned above, although the keyless apparatus for vehicles of the present invention has been described based on the first embodiment and the second embodiment, the specific configuration is not limited to these embodiments, and each claim of the claims Design changes and additions are permitted without departing from the spirit of the invention.
For example, each input / output unit is separately provided in the in-vehicle device, but when using in-vehicle communication, a communication unit may be provided.
In the portable device, a display device is used as a display means for the user. However, the display device may not have a display device, or may be provided with a buzzer or the like that transmits sound.

It is a block diagram of the keyless device for vehicles of Example 1. It is a flowchart which shows the flow of the interference process performed in the control part 31 of the vehicle equipment 3 of the vehicle keyless apparatus of Example 1. FIG. It is explanatory drawing of the interference state which generate | occur | produces in the conventional vehicle keyless apparatus. It is explanatory drawing of the interference prevention operation | movement in the keyless apparatus for vehicles of Example 1. FIG. It is explanatory drawing of the interference prevention operation | movement in the keyless apparatus for vehicles of Example 1. FIG. It is explanatory drawing of the interference prevention operation | movement in the keyless apparatus for vehicles of Example 1. FIG. It is a time chart which shows the state of the other vehicle transmission timing in the vehicle keyless apparatus of Example 1, the estimation of a transmission period, and the change of the transmission timing of the own vehicle. It is a flowchart which shows the flow of the interference process performed in the control part 31 of the vehicle equipment 3 of the vehicle keyless apparatus of Example 1. FIG. It is a time chart which shows the state of the other vehicle transmission timing in the vehicle keyless apparatus of Example 2, the estimation of a transmission period, and the change of the transmission timing of the own vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle keyless apparatus 2 Portable machine 21 Control part 22 RF transmission part 23 Transmission antenna 24 LF reception part 25 Reception coil 26 Indicator 3 Onboard equipment 31 Control part 32 LF transmission part 33 RF reception part 34 Each door opening / closing input part 35 Lock State input unit 36 Lock output unit 37 Unlock output unit 38-40 Outdoor antenna output unit 41-43 Indoor antenna output unit 44 Reception antenna 45-47 Outdoor antenna 48-50 Indoor antenna 51 Request input unit B1 (Vehicle B) Machine 60 (Vehicle A) detection range 70 (Vehicle B) detection range 80 Interference area

Claims (3)

The in-vehicle device installed in the vehicle transmits to the portable device, and when the portable device receives the transmission from the in-vehicle device, it sends a reply signal to the in-vehicle device, performs ID authentication by communication, and locks the vehicle door without key operation. In the vehicle keyless device for unlocking,
The in-vehicle device is
When receiving a signal from a portable device of another vehicle, other vehicle transmission estimation means for estimating the transmission timing and transmission cycle to the portable device by the on-vehicle device of the other vehicle;
Transmission changing means for transmitting to the portable device by shifting so as not to overlap with the estimated transmission timing of the other vehicle,
A vehicle keyless device comprising: The keyless device for a vehicle according to claim 1,
The other vehicle transmission estimation means includes
Other vehicle portable device estimation means for estimating the transmission timing and transmission cycle of the portable device of the other vehicle from the received reception timing and the reception cycle from the portable device of the other vehicle,
From the estimated transmission timing and transmission cycle of the portable device of the other vehicle, other vehicle on-vehicle device estimation means for estimating the transmission timing and transmission cycle of the on-vehicle device of the other vehicle;
A vehicle keyless device comprising: In the keyless device for vehicles according to claim 1 or 2,
The transmission changing means of the in-vehicle device is
When the signal from the portable device of another vehicle is not received a plurality of times within a predetermined time, the transmission timing to the portable device of the own vehicle is returned.
A keyless device for a vehicle.

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