JPH11336394A - On-board equipment remote control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-board equipment remote control device capable of coping with each of smart entry and wireless door lock by preventing a rolling code value from being uselessly discriminated as an error. SOLUTION: An allowable degree for judging whether a rolling code is within a specified range is set relatively larger at the time of a transmission demand than the time of a user operating a switch. Accordingly, even in the case of the rolling code value being counted up by the collision transmission demand S18 of the other vehicle and a return signal, the rolling code value can be prevented from exceeding the specified range, and the rolling code value is prevented from being uselessly discriminated as an error in each of smart entry and wireless door lock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle device remote control device, and more particularly to a device for remotely controlling on-vehicle devices.

[0002]

2. Description of the Related Art Conventionally, there is a so-called smart entry system in which a user carries a wireless device to open / lock a door of a vehicle simply by approaching / leaving the vehicle. For example, Japanese Patent Application Laid-Open No. 5-156851 discloses a transmitter / receiver which is attached to a vehicle and generates intermittently a radio wave for portable device search, and transmits a radio wave having a predetermined code by receiving the radio wave for search. A control device for a vehicle, which includes a portable device for transmitting and unlocks a door when a transmitter / receiver determines that a code of a transmission radio wave matches a specific code, is described.

[0003]

In a conventional apparatus, a search radio wave is copied, and when the user who owns the portable device of the vehicle leaves the vehicle, the search radio wave copied near the user is transmitted. Thus, the transmission radio wave having the predetermined code returned from the portable device is received and copied.
Then, when the user is absent, when a transmission radio wave having a predetermined code copied is transmitted in accordance with the transmission of the request code from the vehicle near the vehicle, the door of the vehicle can be unlocked.

In order to prevent this, it is conceivable to add a rolling code to a predetermined code returned from the portable device. The rolling code is a value that is counted up each time the portable device transmits a radio wave, and the transmitting and receiving device stores the rolling code included in the predetermined code received from the portable device last time, and the predetermined code received this time. When the rolling code included in the code is within a predetermined range from the value of the previous rolling code, the current rolling code is determined to be correct, and it is determined that the received predetermined code matches the specific code.

By the way, a push button switch is provided on the portable device of the above-mentioned smart entry system, and when this switch is pressed in the vicinity of the own vehicle, a transmission radio wave having a predetermined code is transmitted regardless of whether or not a search radio wave is received. It is conceivable to add a wireless door lock system transmitted from a portable device to operate a door lock / door unlock.

In this case, when the user having the portable device is in the vicinity of another vehicle transmitting the same search radio wave as the own vehicle, the portable device receives the search radio wave of the other vehicle and performs rolling. In order to transmit the predetermined code by counting up the code value, the value of the rolling code when transmitting the predetermined code by receiving the search radio wave of the own vehicle is then stored in the transceiver. In other words, the value of the previous rolling code exceeds a predetermined range, and the current rolling code is determined to be incorrect, and there is a problem that the smart entry cannot be executed.

When there are a plurality of users having portable devices near a vehicle transmitting the same search radio wave as the own vehicle, a predetermined code is simultaneously transmitted from each of the plurality of portable devices and transmitted and received. Signals from a plurality of portable devices collide on the device side, and it is not possible to detect a match between the code of the transmission radio wave and the specific code, and the rolling code value of each portable device is counted up unnecessarily. After that, the value of the rolling code when transmitting the predetermined code by receiving the search radio wave of the own vehicle exceeds the predetermined range from the previous rolling code value stored in the transceiver. However, there is a problem that the current rolling code is determined to be incorrect and cannot execute the smart entry.

In a wireless door lock system, it is unlikely that a push button switch of a portable device is operated by mistake.
When the predetermined range for judging whether or not the rolling code is used is widened, the meaning of the provision of the rolling code for preventing erroneous unlocking of the vehicle door is reduced. The present invention has been made in view of the above points, and has a tolerance of a rolling code.
By setting the transmission request larger than when the user operates the switch, the rolling code value in each of the smart entry and the wireless door lock can be prevented from being unnecessarily determined to be incorrect. An object of the present invention is to provide a device remote control device.

[0009]

According to a first aspect of the present invention, there is provided a vehicle which is provided in a vehicle and transmits a transmission request signal, and wherein a signal transmitted from the transmitter is received or a user transmits the signal. When a switch is operated, a predetermined status is set, and a value of a rolling code is variably set to send a return signal. A portable device is provided in the vehicle and receives a return signal transmitted from the portable device. A receiver and a vehicle-mounted device remote control device having control means for controlling operation of the vehicle-mounted device according to a status of the return signal when a value of a rolling code of a return signal received by the receiver is within a predetermined range. Accordingly, the tolerance for determining whether the value of the rolling code is within a predetermined range is larger for the transmission request than when the user operates a switch. Ku set.

As described above, the tolerance for determining whether the value of the rolling code is within the predetermined range is set to be larger when the transmission is requested than when the user operates the switch. The value of the rolling code can be prevented from exceeding a predetermined range even when the value of the rolling code is counted up due to a collision of a transmission request or a return signal of the smart entry, and the value of the rolling code in each of the smart entry and the wireless door lock. Can be prevented from being misunderstood.

According to a second aspect of the present invention, in the on-vehicle device remote control device according to the first aspect, a rolling code when the transmission is requested and a rolling code when the user operates a switch are set independently. I do. As described above, since the rolling code at the time of the transmission request and the rolling code when the user operates the switch are set independently of each other, the user is allowed to determine whether the value of the rolling code is within a predetermined range. The transmission request can be set to be larger than when the switch is operated, and even if the rolling code value of the smart entry is counted up due to a transmission request from another vehicle or collision of a return signal, etc. The value of the rolling code of the door lock is not counted up, so that the rolling code value of each of the smart entry and the wireless door lock can be prevented from exceeding a predetermined range. Can be prevented from being determined as an error.

According to a third aspect of the present invention, in the on-vehicle equipment remote control device according to the first or second aspect, when the transmission request is continued for a predetermined number of times or more, the variation of the value of the rolling code at the time of the transmission request is stopped. . As described above, when the transmission request is repeated for a predetermined number of times or more, the user can operate the switch to determine whether the value of the rolling code is within a predetermined range in order to stop the variation of the value of the rolling code at the time of the transmission request. It is possible to set a larger value at the time of the transmission request relative to the time of the transmission request, and it is possible to prevent the value of the rolling code of the smart entry from being continuously counted up due to a collision of a transmission request or a return signal of another vehicle, The value of the rolling code of each of the smart entry and the wireless door lock can be prevented from exceeding a predetermined range, and the value of the rolling code of each of the smart entry and the wireless door lock can be prevented from being misunderstood.

According to a fourth aspect of the present invention, in the on-vehicle device remote control device according to the third aspect, the transmitter provided in the vehicle detects that the change of the value of the rolling code is stopped. Means for stopping a transmission request to the portable device is provided. In this manner, the transmitter detects that the value of the rolling code has been stopped and stops the transmission request to the portable device. Therefore, when the portable device is left in the vehicle, the transmitter and the portable device are not wasted. Current consumption can be stopped.

[0014]

FIG. 1 is a block diagram showing a first embodiment of the apparatus according to the present invention. In FIG. 1, a body multiplexing ECU (electronic control unit) 10 is a microcomputer that performs various controls related to a vehicle body, such as control of automatic lighting of headlights and meters of a vehicle, control of an air conditioner, control of a door lock, and the like. In addition, a detection signal of the environment detected by the temperature sensor 12, the raindrop sensor 13, the illuminance sensor 14, and the like is supplied. In addition, an operation signal input from the operation panel 11 is supplied. The door lock motor 15 is a body multiplex ECU 10
The drive current is supplied to lock / unlock the door of the vehicle.

The body multiplex ECU 10 is constituted by a microcomputer, and has a central processing unit (CPU) 33 and a read only memory (ROM) 34 as shown in FIG.
, A random access memory (RAM) 35, an input port circuit 36, an A / D converter 37, an output port circuit 38, and a timer 39, which are connected to each other by a bidirectional common bus 40. . Further, a drive circuit 41 for supplying a drive current to the door lock motor 15 and the transmitter 16 are connected to the output port 38.

An operation signal is supplied from the operation panel 11 to the input port circuit 36. Further, the detection signals of the temperature sensor 12, the raindrop sensor 13, and the illuminance sensor 14 are supplied to the A / D converter 37, and the signals are A / D-converted in a time-division manner and taken in. The transmitter 16 is provided in the vehicle and is turned on / off under the control of the body multiplexing ECU 10, and generates a transmission request signal having a frequency of, for example, 2.45 GHz and transmits it from the antenna 18 when it is turned on. The receiver 20 is provided in the vehicle and transmitted from the portable device 24, for example, at a frequency of 300M.
The return signal of Hz is received by the antenna 22, demodulated and supplied to the body multiplexing ECU 10.

The portable unit 24 receives the transmission request signal from the transmitter 16 by the antenna 26, detects the signal by the detection unit 28, and supplies it to the transmission unit 30. The transmitting unit 30 starts operation by the output of the detecting unit 28 or the turning on of the switch 32, generates a return signal obtained by modulating a carrier having a frequency of 300 MHz with a specific code, and transmits the signal from the antenna. FIG. 3 is a circuit configuration diagram of one embodiment of the transmitter. In the figure, a control signal for instructing on at a high level and off at a low level is supplied from a body multiplexing ECU 10 to a terminal 43 and supplied to an oscillator 44. When the oscillator 44 outputs an ON signal, for example, the frequency 2.
After the oscillation signal of 45 GHz is amplified by the power amplifier 45,
It is transmitted from the antenna 18. By this, PWM
Radio waves obtained by AM-modulating a (pulse width modulation) code transmission request signal are transmitted.

FIG. 4 is a circuit diagram showing an embodiment of the portable unit 24. In the figure, a signal received by an antenna 26 is supplied to a detector 28, where a signal having a frequency of 2.45 GHz is detected. This detection output is supplied to a comparator 52 in the transmission unit 30, where it is binarized, shifted and input to an input data register 54, and stored sequentially. The data stored in the input data register 54 is compared with bit patterns of three types of transmission request signals stored in the data comparator 56 in advance. The bit patterns of the three types of transmission request signals are 18-bit specific patterns in which an identification code is added to each code shown in FIGS. 6A, 6B, and 6C described below.

When the input data matches any of the three types of bit patterns of the transmission request signal, the data comparator 56 generates a trigger signal indicating which transmission request signal matches and supplies the trigger signal to the ID generation unit 58. . The ID generation unit 58 generates a 3-bit status based on the presence / absence of the trigger signal and the lock / unlock trigger signal from the push button switch 32, and generates return data in a format as shown in FIG. The switch 32 is a normally open switch, and supplies a trigger signal to the ID generator 58 when pressed by the user. The return data output from the ID generation unit 58 is supplied to the transmission unit 60 and has a frequency of 300 MHz, for example.
Is AM-modulated with the return data and transmitted from the antenna 62.

FIG. 5 is a circuit diagram of an embodiment of the receiver 20. In the figure, the signal received by the antenna 22 is extracted only through the bandpass filter 120, the preamplifier 122, and the bandpass filter 124, and is amplified and supplied to the mixer 126. The local oscillator 128 generates a local oscillation signal having a frequency of about 300 MHz and supplies the signal to the mixer 126.
At 26, the received signal and the local oscillation signal are mixed and the frequency 4
A 55 kHz intermediate frequency signal is obtained.

This intermediate frequency signal is supplied to a bandpass filter 1
Unnecessary frequency components are removed by 30 and the limiter amplifier 13
The signal is amplified by limiting the amplitude at 2. Limiter amplifier 132
After the RSSI (received signal electric field strength) signal output from is removed by the low-pass filter 136 as an AM detection signal, unnecessary high-frequency components are removed, and then compared with a reference level by the comparator 138 to be binarized. As a result, the identification code transmitted from the portable device 24 is obtained, and is supplied from the terminal 140 to the body multiplex ECU 10.

The body multiplexing ECU 10 includes a receiver 20
Is compared with the identification code stored in its own device. If the two match, the door lock motor 15 is driven to unlock the door if it is locked. When the identification code is not supplied from the receiver 20, or when the identification code from the receiver 20 is different from the identification code stored therein, the door lock motor 15 is driven to perform the locking if the unlocked state. .

The present invention can be applied to various remote control systems mounted on a vehicle, such as a smart entry system for automatically locking / unlocking a door depending on whether or not a user is within a predetermined range from the vehicle. The present invention is also applied to a smart lock that automatically locks a door when a user gets on a driver's seat and a smart ignition that automatically starts an engine when the user gets on a driver's seat.

In the case of the smart entry system, the transmission request signal transmitted from the transmitter 16 is a predetermined bit pattern of a PWM (pulse width modulation) code as shown in FIG. The smart entry system that locks / unlocks the door sends this transmission request signal to the outside of the vehicle, but the smart ignition, which automatically starts the engine when the driver gets into the driver's seat, sends the transmission request signal inside the vehicle. Send to. In the case of the smart ignition, the transmission request signal is transmitted to the PW as shown in FIG.
A predetermined bit pattern of the M code is used. FIG. 6 (A),
In (B), the lower 4 bits are different. Note that this P
In the WM code, the bit cycle is constant and the duty ratio is 2
The value is set to 1 when the value is / 3, and to 0 when the duty ratio is 1/3.

The ID generating section 58 of the portable device 24 to which the transmission request signal of the above-mentioned smart entry, smart ignition and sleep instruction is supplied, decodes the bit pattern of the transmission request signal from the reception signal and outputs the bit pattern shown in FIG. If it is a pattern, it is recognized as a smart entry transmission request, if it is the bit pattern of FIG. 6B, it is a smart ignition transmission request, and if it is the bit pattern of FIG. 6C, it is recognized as a sleep instruction transmission request. Then, a 3-bit status is generated based on a trigger based on this recognition and the presence / absence of a lock / unlock trigger signal from the switch 32. When the triggers overlap, a priority is set, the priority is reduced in the order of lock / unlock, smart ignition, and smart entry, and a status with a higher priority is selected.

The ID generator 58 of the portable device 24 generates return data in a format as shown in FIG.
In FIG. 7, a synchronization header section is provided following the preamble section, followed by an identification code section, a status section, and an E section.
A CC (error correction code) unit is provided. The bit patterns of the preamble portion and the header portion are fixed. The identification code part includes a fixed ID part and a rolling code part. A unique bit pattern is set in the fixed ID part, and a rolling code of, for example, 32 bits is set in the rolling code part. The status section stores the 3-bit status generated as described above.

FIG. 8 is a flowchart of a control process executed by the body multiplexing ECU 10 according to a first embodiment. This process is repeatedly executed at predetermined time intervals. In the figure, the body multiplex ECU 10 turns on the power of the receiver 20 in step S12 and starts up, and then in step S14 a predetermined time t1
(For example, 10 msec), and waits for the reception state of the receiver 20 to stabilize. In step S16, when the RSSI signal level in the receiver 20 is equal to or more than the predetermined threshold, the portable device 24
It is determined whether or not a return signal has been received.

Here, if the return signal from the portable device 24 has not been received, it is determined that the switch 32 of the portable device 24 has not been operated, and the process proceeds to step S18, where a control signal is supplied to the transmitter 16 and FIG. The transmission request signal of the smart entry or the smart ignition shown in (A) or (B) is transmitted. Thereafter, in step S20, the receiver 2
It is determined whether or not the return signal from the portable device 24 has been received when the RSSI signal level at 0 is equal to or higher than a predetermined threshold. When the return signal from the portable device 24 has not been received, it is considered that the portable device 24 does not exist near the vehicle, and the power of the receiver 20 is turned off in step S22 and the process waits for a predetermined time t2 (for example, 200 msec). Thereafter, the process proceeds to step S12.

On the other hand, if a return signal is received from the portable device 24 as a response to the transmission request signal in step S20, and if a return signal is received by operating the switch 32 of the portable device 24 in step S16, the process proceeds to step S24. In step S24, the value of the fixed ID part of the identification code part of the return signal shown in FIG.
It is determined whether or not it matches the fixed ID bit pattern stored in the internal register. If the value of the fixed ID portion does not match the fixed ID bit pattern, it is determined that the portable device is not a portable device corresponding to the own vehicle, and the power of the receiver 20 is turned off in step S22 and the predetermined time t2 (for example, 200 ms)
ec) After waiting, go to step S12.

If the value of the fixed ID portion matches the fixed ID bit pattern, whether the status portion of the return signal indicates a smart entry or a value indicating lock / unlock by operating the switch 32 is determined in step S25. Is determined. If the status indicates lock / unlock by operating the switch 32, step S is executed.
In step 26, the window variable N is set to 100, and if the status section indicates a smart entry, the window variable N is set to 10000 in step S28.

Thereafter, in step S30, the value (R) of the rolling code part of the identification code part of the return signal received this time
1) determines whether or not the value (R2) of the previous rolling code portion and the window variable N are within the range represented by the following equation. R2 <R1 <R2 + N When the value (R1) of the current rolling code portion is within the above range, it is determined that the verification is OK, and the value (R1) of the current rolling code portion is set to the value of the previous rolling code portion in step S32. The value is set to the value (R2), and the process proceeds to step S34, where the status of the received return signal is decoded, control is performed in accordance with the content, and the process ends.

On the other hand, if the value (R1) of the current rolling code portion is out of the above range in step S30, it is determined that the rolling code value of the portable device 24 is not normal, and in step S40, the current rolling code portion is determined. Value (R1)
Is set to the value (R2) of the previous rolling code portion. Thereafter, in step S22, the power of the receiver 20 is turned off, and after waiting for a predetermined time t2 (for example, 200 msec), the process proceeds to step S12. Here, if the portable device is a normal portable device, the rolling code value is restored at the first time, and is determined to be normal at the second response (satisfies the condition of step S30), and the control is executed.

In this case, the portable device 24 stores a single rolling code, and counts up the single rolling code in response to a request for a smart entry and a wireless door lock. in this way,
A window variable N as an allowance for determining whether the value of the rolling code is within a predetermined range is set to a value at the time of a transmission request (N = 10000) relative to a time when a user operates a switch (N = 100). The value of the rolling code can be prevented from exceeding a predetermined range even if the value of the rolling code is counted up due to a transmission request of another vehicle, a collision of a return signal, or the like. It is possible to prevent the value of the rolling code from being unnecessarily determined to be incorrect in each door lock.

FIG. 9 is a flowchart of a first embodiment of a process executed by the ID generation unit 58 of the portable device 24. This processing is started when the transmission request signal is received and when the switch 34 is operated. In the figure, step S50
It is determined whether or not a transmission request signal has been received. If the transmission request signal has been received, it is determined that the smart entry or the smart ignition has been performed, and therefore, step S52 is performed.
Then, the rolling code (R10) is incremented by one. Then, the process proceeds to step S54 to set the status portion and the rolling code portion of FIG. 7 using the rolling code (R10) and supply them to the transmitting portion 60, transmit a return signal, and end the process.

If no transmission request signal has been received,
Since locking / unlocking is performed by operating the switch 32, the process proceeds to step S56, where the rolling code (R1
The rolling code R20 provided separately from 0) is incremented by one. Thereafter, the process proceeds to step S58, where the status portion and the rolling code portion shown in FIG. 7 are set using the rolling code (R20) and supplied to the transmitting portion 60, and a return signal is transmitted to terminate the process.

In this case, the body multiplex ECU 1
0 executes the flowchart shown in FIG. 10 differs from FIG. 8 in that the window variable N is set to 100 in step S27 instead of step S26, and the value (R20) of the previous wireless lock rolling code portion is set.
Is set to the value (R2) of the previous rolling code portion. In step S29 instead of step S28, 10000 is set to the window variable N, and the value (R10) of the previous rolling code portion for smart entry is set to the value (R2) of the previous rolling code portion. The value is compared with the value (R1) of the rolling code part of the identification code part of the received return signal.

As described above, since the rolling code (R10) at the time of the transmission request and the rolling code (R20) at the time when the user operates the switch are set independently, whether the value of the rolling code is within a predetermined range is determined. Can be set to be larger at the time of transmission request than when the user operates the switch, and the value of the rolling code of the smart entry is reduced due to a collision of a transmission request or a return signal of another vehicle. Even if the count is incremented, the value of the rolling code of the wireless door lock is not counted up, so that the rolling code value of each of the smart entry and the wireless door lock can be prevented from exceeding a predetermined range. The value of the rolling code is incorrectly incorrect for each lock It can be prevented from being discriminated.

FIG. 11 shows a flowchart of a second embodiment of the processing executed by the ID generation section 58 of the portable device 24. This processing is performed when the transmission request signal is received or when the switch 3
It starts when 4 is operated. The variable I is reset to 0 when the power is turned on. In FIG.
At 62, it is determined whether a transmission request signal has been received. If the transmission request signal has been received, the process proceeds to step S64 where the transmission request signal of the smart entry shown in FIG.
It is determined whether or not the received signal is a smart ignition transmission request signal of (B).

If the signal is a smart entry transmission request signal in step S64, the process proceeds to step S66, where the variable I is incremented by one. In step S68, the variable I is set to a predetermined value I1 (I1 is, for example, about several tens to several hundreds). Is determined, and only when I <I1, the rolling code (R30) is incremented by 1 in step S70. After that, the process proceeds to step S72 to set the status portion and the rolling code portion of FIG. 7 using the rolling code (R30) and supply them to the transmitting portion 60,
A return signal is transmitted and the process ends.

On the other hand, if it is determined in step S64 that the signal is a transmission request for smart ignition, the process proceeds to step S74.
Then, the variable I is set to 0, and the rolling code (R30) is incremented by 1 in step S76.
Thereafter, the process proceeds to step S72, where the rolling code (R
30), the status section and the rolling code section shown in FIG. 7 are set and supplied to the transmission section 60, a return signal is transmitted, and the process is terminated.

If the transmission request signal has not been received in step S62, it is determined in step S63 whether the request is a switch operation. If the request is a switch operation, the lock / lock by operating the switch 32 is determined. Since it is unlocked, the flow advances to step S78 to increment the rolling code (R30) by one. afterwards,
Proceeding to step S72, the status part and the rolling code part shown in FIG. 7 are set using the rolling code (R30) and supplied to the transmitting part 60, and a return signal is transmitted to terminate the processing. If the request is not made by the switch operation in step S63, the process ends.

As described above, the transmission request is transmitted a predetermined number of times (I1).
When the above is continuous, the rolling code (R3
In order to stop the variation of the value of 0), the tolerance for determining whether the value of the rolling code is within a predetermined range can be set to be larger when the transmission is requested than when the user operates the switch. It is possible to prevent the rolling code value of the smart entry from being continuously counted up due to a collision of a transmission request or a return signal of another vehicle, and the rolling code value of each of the smart entry and the wireless door lock is within a predetermined range. The value of the rolling code can be prevented from being unnecessarily determined to be incorrect in each of the smart entry and the wireless door lock. Further, the transmission request is transmitted a predetermined number of times (I
1) Life of a non-volatile memory such as an EEPROM used for storing the rolling code (R30) in the portable device 24 to stop the variation of the value of the rolling code (R30) at the time of transmission request when the transmission code is continuously transmitted. Can be extended.

In the control process executed by the body multiplex ECU 10, as shown in FIG.
After the transmission request is made in step 100, the validity of the identification code of the return signal including the rolling code is determined in step S102. If the identification code is not valid (here, according to the flowchart of FIG. Has been stopped), step S10
In step 4, the fixed code in the identification code of the return signal is stored in the fixed register of the body multiplex ECU 10 in advance.
It is determined whether or not it matches the D bit pattern. Fixed I
If the value of the D portion matches the fixed ID bit pattern, it is considered that the portable device 24 has been left in the vehicle, and step S1 is performed.
In step 06, the transmission request is stopped in the transmission request stop mode. If the value of the fixed ID part does not match the fixed ID bit pattern, the process proceeds to step S100 to make a transmission request.
The situation at this time is shown in FIG. At this time, the portable device 24 is set in the transmission request signal receivable area 15 in the cabin of the vehicle 150.
2 and are usually left in steps S100 to S100.
114 is repeated. Here, when the increment of the rolling code on the portable device 24 side stops, the vehicle side determines in step S102 that the identification code is not valid (the rolling code has not been incremented). A match is determined in step S104, and the transmission request is stopped. This makes it possible to stop unnecessary current consumption of the transmitter 16 and the portable device 24 from the vehicle side. In order to further increase the reliability, the process proceeds to step S106 in step S1.
It may be performed after confirming the repetition of 02 to S104 a plurality of times.

If the identification code is valid in step S102, the unlock standby mode is set in step S108, the timer T is set to a star in step S110, and a predetermined time T1 from the start of the timer T in steps S112 and S114. Then, it is determined whether or not the touch of the user's hand has been detected by the touch sensor installed near the door knob of the vehicle, and if this is satisfied, the door is unlocked in step S116. Proceed to step S100.

The body multiplexing ECU 10 corresponds to the control means, and step S106 corresponds to the means for stopping the transmission request to the portable device.

[0046]

As described above, the first aspect of the present invention provides
A transmitter provided in the vehicle, for transmitting a transmission request signal, and when receiving a signal transmitted from the transmitter, or
When the user operates the switch, while setting a predetermined status respectively, a portable device that variably sets the value of the rolling code and sends out a return signal, and a return signal provided in the vehicle and transmitted from the portable device. In-vehicle device remote control, comprising: a receiver for receiving; and control means for controlling operation of the in-vehicle device according to a status of the return signal when a value of a rolling code of a return signal received by the receiver is within a predetermined range. An apparatus for setting a tolerance for determining whether or not the value of the rolling code is within a predetermined range, at the time of the transmission request, relative to when the user operates a switch.

As described above, the tolerance for determining whether the value of the rolling code is within the predetermined range is set to be larger when the transmission is requested than when the user operates the switch. The value of the rolling code can be prevented from exceeding a predetermined range even when the value of the rolling code is counted up due to a collision of a transmission request or a return signal of the smart entry, and the value of the rolling code in each of the smart entry and the wireless door lock. Can be prevented from being misunderstood.

According to the second aspect of the present invention, a rolling code when a transmission is requested and a rolling code when the user operates a switch are set independently. As described above, since the rolling code at the time of the transmission request and the rolling code when the user operates the switch are set independently of each other, the user is allowed to determine whether the value of the rolling code is within a predetermined range. The transmission request can be set to be larger than when the switch is operated, and even if the rolling code value of the smart entry is counted up due to a transmission request from another vehicle or collision of a return signal, etc. The value of the rolling code of the door lock is not counted up, and it is possible to prevent the value of the rolling code of each of the smart entry and the wireless door lock from exceeding a predetermined range,
It is possible to prevent the value of the rolling code in each of the smart entry and the wireless door lock from being unnecessarily determined to be incorrect.

According to the third aspect of the present invention, when the transmission request continues for a predetermined number of times or more, the variation of the value of the rolling code at the time of the transmission request is stopped. As described above, when the transmission request is repeated for a predetermined number of times or more, the user can operate the switch to determine whether the value of the rolling code is within a predetermined range in order to stop the variation of the value of the rolling code at the time of the transmission request. It is possible to set a larger value at the time of the transmission request relative to the time of the transmission request, and it is possible to prevent the value of the rolling code of the smart entry from being continuously counted up due to a collision of a transmission request or a return signal of another vehicle, The value of the rolling code of each of the smart entry and the wireless door lock can be prevented from exceeding a predetermined range, and the value of the rolling code of each of the smart entry and the wireless door lock can be prevented from being misunderstood.

According to a fourth aspect of the present invention, the transmitter provided in the vehicle detects the stop of the change of the value of the rolling code and stops the transmission request to the portable device. Prepare. In this manner, the transmitter detects that the value of the rolling code has been stopped and stops the transmission request to the portable device. Therefore, when the portable device is left in the vehicle, the transmitter and the portable device are not wasted. Current consumption can be stopped.

[Brief description of the drawings]

FIG. 1 is a block diagram of the device of the present invention.

FIG. 2 is a block diagram of a body multiplex ECU.

FIG. 3 is a circuit configuration diagram of a transmitter.

FIG. 4 is a circuit configuration diagram of the portable device.

FIG. 5 is a circuit configuration diagram of a receiver.

FIG. 6 is a diagram illustrating a bit pattern of a transmission request signal.

FIG. 7 is a diagram showing a format of a return signal.

FIG. 8 is a flowchart of a first embodiment of a control process executed by the body multiplex ECU.

FIG. 9 is a flowchart of a first embodiment of a process executed by the ID generation unit of the portable device.

FIG. 10 shows a second control process executed by the body multiplex ECU.
6 is a flowchart of the embodiment.

FIG. 11 is a flowchart of a process executed by an ID generation unit of the portable device according to a second embodiment.

FIG. 12 is a flowchart of a modified example of the control process executed by the body multiplex ECU.

FIG. 13 is a diagram showing a state where the portable device has been left behind in the vehicle compartment.

[Explanation of symbols]

 Reference Signs List 10 Body multiplexed ECU 11 Operation panel 12 Temperature sensor 13 Rain sensor 14 Illuminance sensor 15 Door lock motor 16 Transmitter 18, 22, 26, 62 Antenna 20 Receiver 24 Portable device 28 Detector 30 Transmitter 32 Switch 52 Comparator 54 Input data Register 56 Data comparator 58 ID generator 60 Transmitter

Claims (4)

[Claims] 1. A transmitter provided in a vehicle for transmitting a transmission request signal, and a predetermined status is set when a signal transmitted from the transmitter is received or when a user operates a switch. In addition, a portable device that variably sets a value of a rolling code and sends out a return signal, a receiver that is provided in the vehicle and receives a return signal transmitted from the portable device, and a return signal that is received by the receiver. When the value of the rolling code is within a predetermined range, the on-vehicle device remote control device having control means for controlling operation of the on-vehicle device according to the status of the return signal, wherein the value of the rolling code is within a predetermined range. The on-vehicle device, wherein the degree of allowance for determining whether the transmission is requested is set to be larger than when the user operates a switch.隔制 control device. 2. The on-vehicle device remote control device according to claim 1, wherein a rolling code at the time of the transmission request and a rolling code at the time of the user operating a switch are set independently of each other. Equipment remote control device. 3. The on-vehicle device remote control device according to claim 1, wherein when the transmission request is repeated for a predetermined number of times or more, the change of the value of the rolling code at the time of the transmission request is stopped. Remote control device. 4. The on-vehicle device remote control device according to claim 3, wherein the transmitter provided in the vehicle detects that the change of the value of the rolling code is stopped, and stops the transmission request to the portable device. A remote control device for an in-vehicle device, comprising: