JP2014177916A - Driving source start system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving source start system having high security.SOLUTION: An engine start system 1 comprises: an electric power source control device 50 outputting a start request signal for requesting start of an engine E to an engine control device 60 based on an input of an operation signal from a push switch 70; and a key detection control device 30 determining the validity of an electronic key 2 through first wireless communication with the electronic key 2 and, when determining that it is valid, having second wireless communication with an immobilizer control device 40. The key detection control device 30 determines through the second wireless communication whether or not there is another communication partner than the normal immobilizer control device 40 and, only when there is no other communication partner than the normal communication partner, outputs a start permission signal to the engine control device 60. The engine control device 60 performs start control of the engine E based on inputs of both the start request signal and the start permission signal.

Description

  The present invention relates to a drive source starting system.

  2. Description of the Related Art Conventionally, an engine start system that starts an engine that is a drive source for running a vehicle based on a user's operation is well known. For example, Patent Document 1 discloses the following engine start system. That is, this engine starting system includes a push switch, a power supply control device, a locking / unlocking control device, an immobilizer control device, an engine control device, and an engine. Each of these components is connected by a dedicated communication path.

  The locking / unlocking control device performs wireless communication with the electronic key possessed by the user, detects that the electronic key is present in the passenger compartment through the wireless communication, and determines the validity of the electronic key.

  Then, when a push switch provided near the driver's seat is pressed with the brake pedal depressed, the power supply control device confirms the determination result of the validity of the electronic key with respect to the immobilizer control device. Then, the immobilizer control device confirms the determination result of the validity of the electronic key with respect to the locking / unlocking control device, and returns the confirmed determination result to the power supply control device. When the determination result indicating that the electronic key is valid is confirmed, the power supply control device turns on the power supply relay of the vehicle and outputs a start request signal for requesting start of the engine to the engine control device. Further, when the immobilizer control device can confirm the determination result that the electronic key is valid, the immobilizer control device sends a start permission signal for permitting the engine start to the engine control device. The engine control device starts the engine when both the start request signal from the power supply control device and the start permission signal from the immobilizer control device are input.

JP 2009-18749 A (FIG. 3)

  By the way, the immobilizer control device has been conventionally installed in a part that is difficult for humans to reach for the purpose of preventing fraud, but it is connected to other components by wire, that is, a dedicated communication path, so it is installed in a vehicle There was a restriction on the position.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a drive source starting system having high security by increasing the degree of freedom of mounting an immobilizer control device on a vehicle. .

  In order to solve the above-described problem, a start request signal for requesting start of the drive source is generated based on an input of an operation signal from a start switch operated by a user to start a drive source for traveling of the vehicle. The validity of the electronic key is determined through the first wireless communication between the power source control device that outputs to the drive source control device that performs the starting control and the electronic key possessed by the user. A drive detection system including a key detection control device that performs second wireless communication with the immobilizer control device, wherein the key detection control device or the immobilizer control device passes through the second wireless communication. Start permission that determines whether or not there is a communication partner in addition to the regular communication partner, and permits the start of the drive source only when there is no communication partner in addition to the regular communication partner Is output to the drive source control device, and the drive source control device performs start control of the drive source based on the input of both the start request signal and the start permission signal. .

  According to the system having this configuration, the key detection control device and the immobilizer control device can be provided independently. That is, the key detection control device and the immobilizer control device are not connected by a communication line or the like. For this reason, even if a device that outputs a start permission signal of another drive source start system, for example, a key detection control device, is connected to the drive source control device of a normal drive source start system, the key detection of this other drive source start system The control device performs second wireless communication with the two immobilizer control devices. Since the key detection control device outputs a start permission signal to the drive source control device only when there is no communication partner other than the regular communication partner, the key detection control device that communicates with the two immobilizer control devices No start permission signal is output.

  In order to output a start permission signal to the key detection control device of another drive source starting system, it is necessary to remove the regular immobilizer control device from the vehicle. However, the regular immobilizer control device is connected to the key detection control device. Since wireless communication is performed, it can be provided at any position on the vehicle. In other words, it is difficult for a third party to remove the regular immobilizer control device because it is not known in which position the vehicle is provided. That is, since it is difficult for a third party to start the driving source of the vehicle, this driving source starting system has high security.

  In the system configured as described above, one of the key detection control device and the immobilizer control device outputs the start permission signal to the drive source control device, and the other includes a battery and is driven by consuming power of the battery. Is preferred.

  According to the system of this configuration, since the control device that consumes the power of the secondary battery and is driven is not connected to the power source and the other control device, the degree of freedom of the position of the control device mounted on the vehicle is improved. . This makes it more difficult for a third party to find this control device.

  In the system configured as described above, the battery is a rechargeable secondary battery, and the key detection control device or the immobilizer control device including the secondary battery includes a charger that charges the secondary battery. It is preferable to provide.

  According to the system having this configuration, there is no need to remove the control device including the secondary battery or connect an electric wire for charging the secondary battery to the control device. For this reason, a control apparatus provided with the said secondary battery can be mounted in the position where it is more difficult to remove from a vehicle.

  In the system configured as described above, it is preferable that the key detection control device or the immobilizer control device including the battery notifies the user through a notification device that appeals to the user's sense when the power of the battery is lower than a set value.

  According to the system of this configuration, the user can recognize that the power has decreased through the notification device, so the user takes measures such as replacing the battery before the drive source starting system becomes unusable. be able to.

  The drive source starting system of the present invention has high security.

The block diagram which shows schematic structure of an engine starting system. The flowchart which shows the process of a detection control part. The top view which shows the mounting position of an immobilizer control apparatus.

Hereinafter, an embodiment in which the drive source starting system is embodied as an engine starting system for a vehicle in which the driving source for traveling is an engine will be described.
As shown in FIG. 1, the engine starting system 1 includes an electronic key 2 possessed by a user and an in-vehicle device 3 that performs wireless communication between the electronic key 2.

<In-vehicle device>
The in-vehicle device 3 includes a key detection control device 30, an immobilizer control device 40, a power supply control device 50, and an engine control device 60. The key detection control device 30 is connected to the power supply control device 50 and the engine control device 60 via a dedicated communication path. The power supply control device 50 is connected to the engine control device 60 via a dedicated communication path. The power control device 50 is also connected to the push switch 70, and the engine control device 60 is also connected to the engine E.

<Push switch>
The push switch 70 is exposed, for example, on the dashboard so that the user can perform a push operation. When the push switch 70 is pressed while the brake pedal is depressed, the push switch 70 transmits an operation signal indicating that to the power supply control device 50.

<Power control device>
When the power supply control device 50 receives the operation signal from the push switch 70, the power supply control device 50 transmits a start request signal Seg for requesting the start of the engine E to the engine control device 60 via a dedicated communication path. Further, when the power supply control device 50 receives the operation signal from the push switch 70, the power supply control device 50 generates a reception signal indicating that, and transmits it to the key detection control device 30 via a dedicated communication path. The power supply control device 50 is electrically connected to the vehicle battery 80. The power supply control device 50 is driven by consuming the power of the battery 80.

<Key detection control device>
The key detection control device 30 includes a detection control unit 31 that comprehensively controls wireless communication performed between the electronic key 2 possessed by the user and the immobilizer control device 40, and a radio signal in the LF (Low Frequency) band. LF transmitter 32 and UHF receiver 33 that receives a radio signal in the UHF (Ultra High Frequency) band. The LF transmitter 32 and the UHF receiver 33 are connected to the detection controller 31. An ID code A stored in the electronic key 2 and an ID code B stored in the immobilizer control device 40 are stored in the memory 31 a of the detection control unit 31.

  The detection control unit 31 generates a first request signal that requests an ID code from the electronic key 2 at a predetermined cycle. The LF transmission unit 32 converts the first request signal into an LF band radio signal, and wirelessly transmits the signal to a communication area set in the vehicle interior. When receiving a UHF band radio signal, the UHF receiving unit 33 converts the UHF band radio signal into a pulse signal.

  When the detection control unit 31 receives the first response signal from the electronic key 2 in response to the first request signal, the detection control unit 31 determines the validity of the signal. The validity is determined by comparing the ID code A included in the first response signal with the ID code A of the memory 31a. When it is determined that the first response signal from the electronic key 2 is valid, the detection control unit 31 generates a second request signal that requests the immobilizer control device 40 for an ID code. The LF transmission unit 32 converts the second request signal into an LF band radio signal, and wirelessly transmits the signal to a communication area set in the vehicle interior.

  When the detection control unit 31 receives the second response signal from the immobilizer control device 40 with respect to the second request signal, the detection control unit 31 determines the validity of the signal. The validity is determined by comparing the ID code B included in the second response signal with the ID code B of the memory 31a. When it is determined that the second response signal from the immobilizer control device 40 is valid and the reception control signal is received from the power supply control device 50, the detection control unit 31 starts the engine E via a dedicated communication path. Is generated, and is transmitted to the engine control device 60.

  When the second response signal is determined to be valid, the detection control unit 31 determines that another second response signal different from the second response signal determined to be valid, that is, two or more It is determined whether a second response signal has been received. When the detection control unit 31 has not received two or more second response signals, the detection control unit 31 generates the start permission signal Sp, and when the two or more second response signals are received, The start permission signal Sp is not generated.

  The key detection control device 30 is connected to a vehicle speaker 81. When the second response signal includes information indicating that the voltage of the secondary battery 44 is decreasing, the detection control unit 31 indicates that the voltage of the secondary battery 44 is decreasing. The user is notified through the speaker 81. Note that the speaker 81 corresponds to a notification device.

The key detection control device 30 is connected to a vehicle battery 80. Each unit of the key detection control device 30 is driven while consuming the power of the battery 80.
<Immobilizer control device>
The immobilizer control device 40 includes an immobilizer control unit 41 that comprehensively controls wireless communication performed with the key detection control device 30, an LF reception unit 42 that receives an LF band radio signal, and a UHF band radio signal. A UHF transmission unit 43 for transmission. The LF receiver 42 and the UHF transmitter 43 are connected to the immobilizer controller 41. When receiving the LF band radio signal, the LF receiver 42 converts it into a pulse signal. The memory 41 a of the immobilizer control unit 41 stores an ID code B that is also stored in the key detection control device 30. When the immobilizer control unit 41 recognizes the second request signal from the key detection control device 30, the immobilizer control unit 41 generates a second response signal including the ID code B as a response thereto. The UHF transmission unit 43 converts the second response signal into a UHF band radio signal, and wirelessly transmits this to a communication area set in the vehicle interior.

  The immobilizer control device 40 includes a secondary battery 44 and a non-contact charger 45 that charges the secondary battery 44. Each part of the immobilizer control device 40 is driven while consuming the electric power of the secondary battery 44. The non-contact charger 45 is a charger including, for example, an NFC (Near Field Communication) communication circuit. The non-contact charger 45 converts the NFC signal transmitted from the non-contact charger 91 provided outside the vehicle and connected to the commercial power supply 90 into electric power, and the secondary battery 44 is converted by the converted electric power. To charge.

  In addition, when the voltage of the secondary battery 44 is lower than the set value, the immobilizer control unit 41 uses the second response signal to indicate information indicating that the voltage of the secondary battery 44 is reduced. Include. The set value is stored in advance in the memory 41a of the immobilizer control unit 41.

<Engine control device>
When the engine control device 60 recognizes both the start request signal Seg and the start permission signal Sp, the engine control device 60 starts the engine E. The engine control device 60 is connected to a vehicle battery 80. The engine control device 60 is driven by consuming the electric power of the battery 80. The engine control device 60 corresponds to a drive source control device.

<Electronic key>
The electronic key 2 includes an electronic key control unit 21 that comprehensively controls wireless communication performed with the key detection control device 30, an LF reception unit 22 that receives an LF band radio signal, and a UHF band radio signal. A UHF transmitter 23 for transmission. The LF receiver 22 and the UHF transmitter 23 are connected to the electronic key controller 21.

  When the LF receiver 22 receives a radio signal in the LF band, the LF receiver 22 converts it into a pulse signal. An ID code A that is also stored in the key detection control device 30 is stored in the memory 21 a of the electronic key control unit 21. When the electronic key control unit 21 recognizes the first request signal from the key detection control device 30, the electronic key control unit 21 generates a first response signal including the ID code A as a response thereto. The UHF transmission unit 23 converts the first response signal into a UHF band radio signal and wirelessly transmits the signal.

<Processing for generation of start permission signal in detection control unit>
Next, processing relating to generation of the start permission signal Sp in the detection control unit 31 will be described with reference to the flowchart shown in FIG. The process starts when the first response signal from the electronic key for the first request signal generated periodically is determined to be valid, and the second request signal is generated and transmitted.

  As illustrated in FIG. 2, when the detection control unit 31 generates the second request signal, the detection control unit 31 determines whether or not a second response signal for the second request signal has been received (step S1). If YES in step S1, that is, if the second response signal is received, the validity of the second response signal is determined through the ID code B included in the second response signal (step S2). If YES in step S2, that is, if it is determined that the second response signal is valid, the detection control unit 31 recognizes that the second response signal from the regular immobilizer control device 40 has been received. And the detection control part 31 judges whether the received 2nd response signal is one with respect to the produced | generated 2nd request signal (step S3). YES in step S3, that is, when the second response signal received for the generated second request signal is one, that is, when the second response signal is received only from the regular immobilizer control device 40. Generates a start permission signal Sp (step S4) and ends the process.

  Note that if NO in step S1, that is, if the second response signal is not received, the immobilizer control device 40 may be removed from the vehicle, so the detection control unit 31 does not generate the start permission signal Sp. The process is terminated.

  Further, if NO in step S2, that is, if the second response signal is not valid, there is a possibility that an immobilizer control device that is not a regular immobilizer control device 40 is brought into the vehicle. The process is terminated without generating the start permission signal Sp.

  Furthermore, NO is determined in step S3, that is, when there are a plurality of second response signals received for the generated second request signal, an immobilizer control device that is not a regular immobilizer control device 40 is brought into the vehicle. Since there is a possibility, the detection control unit 31 ends the process without generating the start permission signal Sp.

<Operation of engine starting system>
The immobilizer control device 40 communicates wirelessly with the key detection control device 30. Unlike the case of wired connection, restrictions on the mounting location due to a wiring route or the like are eased, so that the immobilizer control device 40 can be provided independently of the key detection control device 30. Further, the immobilizer control device 40 consumes power of the secondary battery 44 and drives it. For this reason, the immobilizer control device 40 can be provided independently of the battery 80. Accordingly, the immobilizer control device 40 can be provided at any position in the vehicle as long as the second response signal from the key detection control device 30 can be received. That is, as shown in FIG. 3, it can be provided on any of the dashboard, under the seat, floor, trunk, etc. of the vehicle.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The key detection control device 30 performs wireless communication with the electronic key 2 and determines the validity of the electronic key 2 through the wireless communication. Further, when it is determined that the electronic key 2 is valid, the key detection control device 30 performs wireless communication with the immobilizer control device 40 and determines the validity of the immobilizer control device 40 through the wireless communication. Then, the key detection control device 30 determines whether or not a radio signal has been received from another immobilizer control device when it is determined that the immobilizer control device 40 is valid, and when not received, the key detection control device 30 is started. The permission signal Sp is generated and output to the engine control device 60.

  Thus, since the key detection control device 30 determines the validity of the immobilizer control device 40 through wireless communication, the relative positional relationship between the key detection control device 30 and the immobilizer control device 40 can be freely set. it can. In other words, the immobilizer control device 40 may be provided at any position on the vehicle as long as wireless communication with the key detection control device 30 is possible. For this reason, the immobilizer control device 40 can be provided at a position where it is difficult for a third party to find.

  Moreover, the key detection control apparatus 30 does not generate | occur | produce the start permission signal Sp, when the radio signal from the immobilizer control apparatus 40 which does not respond | correspond with self is received. Therefore, a third party connects a key detection control device of another engine start system of the same type as that of this example to the engine control device 60, and uses the immobilizer control device corresponding to the other key detection control device to engine E. The other key detection control device does not generate the start permission signal Sp because the other key detection control device also performs wireless communication with the regular immobilizer control device 40. In order to cause the key detection control device of the other engine start system to generate the start permission signal Sp, it is necessary to remove the regular immobilizer control device 40 from the vehicle, but the regular immobilizer control device 40 is more difficult to find. In addition to being provided at a place and not connected to the key detection control device 30, it is difficult for a third party to find it. Thereby, this engine starting system 1 has high security.

  (2) The secondary battery 44 is provided in the immobilizer control device 40. The immobilizer control device 40 is driven by consuming the electric power of the secondary battery 44. Thereby, immobilizer control device 40 does not need to be connected with battery 80 of vehicles, for example. That is, the freedom degree of the position where the immobilizer control device 40 is mounted on the vehicle is improved. Thereby, the immobilizer control device 40 can be provided at a position where it is more difficult for a third party to find the immobilizer control device 40.

  (3) The immobilizer controller 40 is provided with a non-contact charger 45 that charges the secondary battery 44. The non-contact charger 45 converts an NFC signal from the outside into electric power, and charges the secondary battery 44 with this electric power. That is, even if the voltage of the secondary battery 44 decreases, it is not necessary to remove the immobilizer control device 40 from the vehicle or connect an electric wire for charging the secondary battery 44 to the immobilizer control device 40. For this reason, the immobilizer control device 40 can be mounted at a position that is more difficult to remove from the vehicle.

  (4) The key detection control device 30 and the vehicle speaker 81 are connected. When the second response signal from the immobilizer control device 40 includes information indicating that the voltage of the secondary battery 44 is decreasing, the detection control unit 31 decreases the voltage of the secondary battery 44. The user is notified through the speaker 81. As a result, the user can recognize that the voltage of the secondary battery 44 has decreased, so that the immobilizer control device 40 and thus the secondary battery 44 can be charged before the engine start system 1 becomes unusable. This can be done.

  (5) Wireless communication between the electronic key 2 and the key detection control device 30 and between the key detection control device 30 and the immobilizer control device 40 is performed using bands of the LF band and the UHF band. For this reason, the key detection control device 30 can wirelessly communicate with the electronic key 2 and the immobilizer control device 40 via the set of LF transmission unit 32 and UHF reception unit 33, respectively. The configuration related to the wireless communication of the device 30 is simplified.

In addition, you may change the said embodiment as follows.
In the above embodiment, the signal band of wireless communication performed between the electronic key 2 and the key detection control device 30 is different from the signal band of wireless communication performed between the key detection control device 30 and the immobilizer control device 40. It may be. In this case, the key detection control device 30 may include a communication device used for wireless communication with the electronic key 2 and a communication device used for wireless communication with the immobilizer control device 40. Even in such a configuration, the same effects as the effects (1) to (4) of the above embodiment can be obtained.

  In the embodiment described above, a display device that notifies that the voltage of the secondary battery 44 has decreased through vision instead of the speaker 81 may be employed. Even when configured in this manner, the same effects as those of the above-described embodiment can be obtained. Further, the speaker 81 and the display device may be used in combination. Note that a notification device such as the speaker 81 may be omitted. Even in such a configuration, the same effects as the effects (1) to (3) and (5) of the above embodiment can be obtained.

  In the above embodiment, the contactless charger 45 may be a connection type charger that charges the secondary battery 44 by being connected to a commercial power source. Even in such a configuration, the same effects as the effects (1), (2), (4), and (5) of the above embodiment can be obtained.

  In the embodiment described above, a so-called primary battery that cannot be charged may be employed instead of the secondary battery 44. In this case, a charger such as the non-contact charger 45 is omitted. Even in such a configuration, the same effects as the effects (1) and (5) of the above embodiment can be obtained.

  In the above embodiment, the start permission signal Sp is generated by the key detection control device 30, but may be generated by the immobilizer control device 40 as indicated by a broken line in FIG. In such a configuration, the key detection control device 30 replaces the second request signal with a confirmation signal including the ID code B to determine its validity as shown in parentheses in FIG. Is generated. The immobilizer control device 40 determines the validity of the key detection control device 30 through the received confirmation signal. When the key detection control device 30 is determined to be valid, the immobilizer control device 40 is shown in parentheses in FIG. 1 to determine whether there is a key detection control device of another engine start system. A third request signal is generated as follows. When receiving the third request signal, the key detection control device 30 generates a third response signal including the ID code B as shown in parentheses in FIG. The immobilizer control device 40 determines the validity of the key detection control device 30 again through the received third response signal. The immobilizer control device 40 generates the start permission signal Sp when the key detection control device 30 is determined to be appropriate. Even in such a configuration, the same effect as the effect (1) of the above embodiment can be obtained.

  In this case, the engine control device 60 may be provided with a communication device that receives a radio signal from the immobilizer control device 40, and the immobilizer control device 40 may wirelessly transmit the start permission signal Sp. Even with this configuration, the immobilizer control device 40 is not connected to the key detection control device 30 and the engine control device 60. Therefore, the freedom degree of the mounting position to the vehicle of the immobilizer control apparatus 40 improves. In this configuration, a battery that supplies driving power to the key detection control device 30 may be provided. That is, there is no need to connect the key detection control device 30 and the battery 80. If comprised in this way, the key detection control apparatus 30 can be provided independently from the other structure of the engine starting system 1. FIG. Thereby, the freedom degree of the mounting position to the vehicle of the key detection control apparatus 30 improves. Therefore, even if an immobilizer control device of another engine start system of the same type as that of this separate example is brought into the vehicle and the engine E is started using the other immobilizer control device, the other immobilizer control device is Since wireless communication is performed also with the regular key detection control device 30, the start permission signal Sp is not generated. Thereby, this engine starting system has high security. Moreover, if the battery mounted in the key detection control apparatus 30 is a secondary battery, you may provide the charger for charging to this.

  In the above embodiment, the power supply control device 50 generates the start request signal Seg based on the reception of the operation signal from the push switch 70, but information indicating that the electronic key 2 is valid from the key detection control device 30. The start request signal Seg may be generated based on reception of both the included signal and the previous operation signal.

  In the above embodiment, the driving source for running the vehicle is the engine E that is an internal combustion engine, but it may be a motor or a hybrid system that combines an engine and a motor.

Next, the technical idea conceived from the embodiment and the other examples will be described.
(A) In the system having the above configuration, the charger is a non-contact charger.
According to the system of this configuration, the control device including the non-contact charger can charge the secondary battery in a non-contact state with the power source for charging, so that the third party finds the control device more. It can be mounted at a position where it becomes difficult to do so.

  (B) In the system configured as described above, wireless communication between the electronic key and the key detection control device and wireless communication between the key detection control device and the immobilizer control device are performed in the same band. .

  According to the system of this configuration, the key detection control device can wirelessly communicate with the electronic key and the immobilizer control device via the same communication device, so the configuration related to the wireless communication of the key detection control device is Be simple.

DESCRIPTION OF SYMBOLS 1 ... Engine start system, 2 ... Electronic key, 3 ... In-vehicle apparatus, 21 ... Electronic key control part, 21a, 31a, 41a ... Memory, 22, 42 ... LF reception part, 23, 43 ... UHF transmission part, 30 ... Key Detection control device, 31 ... detection control unit, 32 ... LF transmission unit, 33 ... UHF reception unit, 40 ... immobilizer control device, 41 ... immobilizer control unit, 44 ... secondary battery, 45, 91 ... non-contact charger, 50 DESCRIPTION OF SYMBOLS ... Power supply control device 60 ... Engine control device 70 ... Push switch 80 ... Battery 81 ... Speakers 90 ... Commercial power supply.

Claims (4)

Drive source control for performing start control of the drive source based on an input of an operation signal from a start switch operated by a user to start a drive source for driving the vehicle When the validity of the electronic key is determined through first wireless communication between the power supply control device to be output to the device and the electronic key possessed by the user, and the immobilizer control device is determined to be appropriate And a key detection control device for performing the second wireless communication,
The key detection control device or the immobilizer control device determines whether there is a communication partner in addition to the regular communication partner through the second wireless communication, and there is a communication partner in addition to the regular communication partner. A start permission signal for permitting the start of the drive source only when not, to the drive source control device,
The drive source control device is a drive source start system that performs start control of the drive source based on the input of both the start request signal and the start permission signal. The drive source starting system according to claim 1,
One of the key detection control device and the immobilizer control device outputs the start permission signal to the drive source control device, and the other includes a battery and is driven by consuming power of the battery. The drive source starting system according to claim 2,
The battery is a rechargeable secondary battery,
The key detection control device or the immobilizer control device including the secondary battery is a drive source starting system including a charger that charges the secondary battery. The drive source starting system according to claim 2 or 3,
The key detection control device or the immobilizer control device including the battery is a drive source start system that notifies through a notification device that appeals to the user's feeling when the power of the battery is lower than a set value.