JP6623390B2 - Power control device - Google Patents

Description

  The present invention relates to a power supply control device such as a car accessory added by a user to the interior of an automobile after factory shipment, such as a retrofit car accessory of an automobile, and more particularly, to a power supply control apparatus in a traveling state or a traveling preparation state. The present invention relates to a power supply control device that supplies power to a car accessory or the like only at a certain time.

  Generally, a power connection socket (cigar socket or accessory socket) for supplying power from a vehicle battery to a rear car accessory such as a map lamp used in the vehicle, around a driver's seat or a rear seat. Hereinafter, it is referred to as an accessory socket). Depending on the make and type of the car, the accessory socket allows the key (ignition switch) of the car to turn on the power supply at the ACC (accessory) position, and keeps the power supply on regardless of the position of the ignition switch There are things to be done.

  For example, if a car accessory or the like that uses electric power continuously is installed in an automobile having an accessory socket in which power supply is maintained ON (power is supplied from the accessory socket), the battery may be exhausted due to long-term parking. . In order to prevent such a car accessory from running out of battery, a power supply control device that does not supply power from an accessory socket to a car accessory or the like when an electric generator (alternator) linked to the engine is not operating is known. (For example, see Patent Document 1). In Patent Literature 1, an operation state of a power generator (or an engine) is detected by alternator noise of the power generator superimposed on an output voltage of a battery.

  In recent years, hybrid cars (HV) having both a driving motor and an engine have been released by a plurality of manufacturers, and some of them are capable of running a predetermined distance only by a battery without starting an engine. is there. Also, there are cars with an idling stop function that temporarily stops the engine when waiting for a traffic light at an intersection, and quickly starts the engine when the traffic light turns green and the accelerator is depressed.

JP-A-11-222084

  The number of accessory sockets installed on a standard general automobile is basically one, and the number of accessory sockets is two or three even for a luxury car or a large car having many passengers. On the other hand, car accessories basically require one accessory socket for each car accessory, and if the occupant wants to use a plurality of car accessories simultaneously, the number of accessory sockets may be insufficient. There is.

  Further, in the case of a vehicle that can run on only the battery or a vehicle with an idling stop function, the alternator noise does not occur because the power generation device does not operate during battery running or idling stop. In such an automobile, if the power supply of the car accessory is controlled by the power supply control device of Patent Literature 1, the car accessory cannot be used while the battery is running or the engine is stopped by the idling stop function.

  In order to solve the above-described problems, the present invention provides a power supply that can supply power from a device other than an accessory socket, and that can supply power to a wide variety of car accessories and the like even during battery running or idling stop. It is an object to provide a control device.

  (1) In order to solve the above-mentioned problems, in a power supply control device, a communication unit that communicates with a vehicle-side computer via an in-vehicle communication network, a noise detection unit that detects noise from a power supply voltage, and a predetermined electronic device from a power supply. A switch for turning on / off a power supply voltage supplied to the circuit, a control unit for controlling on / off of the switch using a signal from the vehicle-side computer received by the communication unit and noise detected by the noise detection unit. Prepare.

In the power supply control device, a signal output from the vehicle-side computer to the in-vehicle communication network is used for ON / OFF control of the power supply voltage supplied to the predetermined electronic circuit. When noise cannot be detected, power can be supplied to a predetermined electronic circuit using a signal received from the vehicle-side computer.
The predetermined electronic circuit may be, for example, an electronic circuit provided inside a car accessory or the like. It is particularly preferable that the power supply control device is built in, for example, a power supply connector.
Alternatively, a predetermined electronic circuit and the present power supply control device may be incorporated in a car accessory or the like.

  (2) Preferably, the noise detection means of the power supply control device detects noise generated at the time of starting the vehicle.

  As the noise generated at the time of starting the vehicle, for example, in the case of an automobile having an engine, it is preferable to use the noise generated at the time of starting the vehicle due to the voltage drop by the engine starter, instead of the alternator noise of the conventional power generator. . The alternator noise is noise that remains after rectification due to the operation of the AC generator, so that the noise level is relatively high and the noise level is relatively small. Since a relatively large level of noise is generated for a relatively long time by a starter that uses a large power that causes a voltage drop even when all the components are stopped, noise detection errors are reduced. In addition, as noise generated at the time of starting the vehicle, for example, in the case of an electric vehicle or a hybrid vehicle, there is a noise generated when power supply to each part of the vehicle is started. For example, in the case of an automobile such as an electric car or a hybrid car whose power supply is started when communication with a transmitter owned by the driver is established, whether noise of the same pattern as that generated at this time occurs. May be determined. As this noise, noise due to a voltage drop may be detected. By using the noise generated at the time of starting the vehicle with a small detection error and the signal received from the vehicle-side computer, it is possible to reliably supply power to a predetermined electronic circuit after starting the vehicle.

  (3) Preferably, the control unit of the power supply control device does not turn off the switch when a signal from the vehicle-side computer can be received, even when the noise generated at the time of starting the vehicle is not detected by the noise detection unit. It is good to

  In this manner, the power supply control device can supply power to a predetermined electronic circuit even during battery running or idling stop. This is because, in a hybrid car (HV) or an automobile having an idling stop function, the vehicle-side computer wakes up and outputs speed information, traveling-related information, and the like even during battery running or idling stop. .

(4) Preferably, in the power supply control device, the noise generated at the time of starting the vehicle is a noise including a voltage drop generated at the time of starting the engine of the vehicle having the engine.
By doing so, the noise detection means can accurately detect the start of the vehicle having the engine.

(5) Preferably, in the noise detection means of the power supply control device, the noise generated at the time of starting the vehicle is a noise including a voltage drop generated when power supply to the electric vehicle is turned on. .
By doing so, the noise detection means can accurately detect the start of the electric vehicle.

  (6) Preferably, the control means of the power supply control device turns on the switch when the noise detection means detects a noise generated at the time of starting the vehicle after the communication means can receive a signal from the vehicle-side computer. It is good to do it.

  By doing so, the power supply control device can reliably prevent erroneous determination by turning on the switch when noise is detected after the communication unit receives a signal from the vehicle-side computer. For example, a vehicle-side computer of a vehicle having a security function such as an immobilizer transmits a signal for canceling the security function before starting the vehicle where vehicle noise occurs, so that after receiving this signal, the noise is detected. By turning on the switch in such a case, erroneous determination can be reliably prevented for a vehicle having a security function. The state after the signal from the vehicle-side computer can be received may be after the state from the state where the signal from the vehicle-side computer cannot be received to the state after the state where the signal from the vehicle-side computer can be received. It is particularly preferable that the signal received from the vehicle-side computer is a signal that is not output when the vehicle is in a state in which traveling cannot be started.

  (7) Preferably, the communication means of the power supply control device uses both an in-vehicle communication network that outputs a spontaneous output signal from the vehicle-side computer and an in-vehicle communication network that outputs a response output signal from the vehicle-side computer. Good.

  In this way, in the power supply control device, the network used is one for both the vehicle type of the in-vehicle communication network using the spontaneous output signal and the vehicle type for the vehicle type of the in-vehicle communication network using the response output signal. The power supply to the predetermined electronic circuit can be accurately controlled only by the power supply control device. The spontaneous output signal is a signal that is actively output from the vehicle-side computer, and the response output signal is a signal that is passively output from the vehicle-side computer only when a response request is received.

  (8) Preferably, the communication means of the power supply control device is configured to be communicable by connecting to a plurality of different in-vehicle communication networks, and the control means monitors the plurality of different in-vehicle communication networks connected to the communication means. The switch may be determined to be ON / OFF using information from the in-vehicle communication network with which the communication means of the plurality of different in-vehicle communication networks can communicate.

  By doing so, the power supply control device uses an in-vehicle communication network that can communicate among a plurality of different in-vehicle communication networks. Power can be supplied to the electronic circuit.

  (9) Preferably, the control means of the power supply control device turns on the switch when a signal from the vehicle-side computer is received, and turns off the switch when the signal from the vehicle-side computer cannot be received.

  By doing so, the control means of the power supply control device turns on the power supply voltage to be supplied to a predetermined electronic circuit when a signal is received from the vehicle-side computer, not when noise is detected from the power supply voltage. When a signal from the computer cannot be received, the power supply voltage supplied to a predetermined electronic circuit is controlled to be OFF. That is, when the vehicle-side computer is awake, the power supply voltage to be supplied to a predetermined electronic circuit is turned on, so that a hybrid car (HV) or an automobile having an idling stop function can use the predetermined electronic circuit during traveling. be able to.

  (10) Preferably, the power supply control device may include a connection means for connecting to an in-vehicle connector for self-diagnosis including an in-vehicle communication network connection terminal and a power supply terminal.

  For example, a connection means (for example, a connector corresponding to an in-vehicle connector such as an OBD) that can be connected to an in-vehicle connector such as an OBD exposed in the vehicle may be provided. The in-vehicle connector of the OBD is provided with a power supply terminal in addition to a connection terminal with the in-vehicle communication network. Therefore, even if the user has no knowledge of the in-vehicle wiring of the vehicle, the user can connect the power supply by himself / herself. It can be removed without having to go to a maintenance shop.

  The signal output from the vehicle-side computer to the in-vehicle communication network is output even after receiving the response request signal from another after the start of the vehicle-side computer, depending on the type of the in-vehicle communication network adopted by the vehicle. A spontaneous output signal (spontaneous output signal: for example, a signal for a CAN (Controller Area Network)) and a responsive output signal (response output signal: for example, K- Line signal).

  Some of the on-vehicle computers are provided with a system (software) for self-diagnosis ((on-board diagnosis: OBD) I or II) which is indispensable due to exhaust gas regulations and the like. For example, when diagnosing the engine of an automobile, a scan tool for reading data is connected to the in-vehicle connector of the OBD exposed in the cabin, and a signal output from the vehicle-side computer to the in-vehicle communication network by the scan tool. And read to diagnose the failure. At this time, if the in-vehicle communication network connected to the vehicle-side computer is the CAN described above, a signal is spontaneously output. Therefore, the signal is awaited, and it is analyzed that the signal is output from the vehicle-side computer. Just need. However, if the in-vehicle communication network is the K-Line described above, a signal cannot be received only by waiting, so that a response request signal is transmitted first, and a signal output as a response from the on-vehicle computer is awaited.

  General purpose car accessories can be attached to any of a wide variety of vehicles. At present, domestic automobiles are selected from a wide variety of networks such as CAN and K-Line, as well as their own in-vehicle communication network, in-vehicle multimedia network, door and seat network, and security network. You are using any network. However, in the self-diagnosis system, either the CAN or K-Line signal output from the vehicle computer is used, and an OBD in-vehicle connector (a connector shown in FIG. 3 described later) is used as the connector. Have been. Therefore, the CAN signal is received from the in-vehicle connector of the OBD and the signal is read from the computer on the vehicle side, or the response request signal of the K-Line is transmitted to the in-vehicle connector of the OBD to output the response output signal. By receiving the information, it is possible to know that the vehicle-side computer is awake. By connecting to the in-vehicle connector for self-diagnosis by the connection means of the power supply control device in this way, it is possible to supply power from other than the accessory socket, and to provide a power supply control device that can be attached to various types of vehicles. it can.

(11) Preferably, a communication unit, a noise detection unit, and a control unit are provided in the housing having the connection unit of the power supply control device.
With this configuration, the power supply control device includes the communication unit, the noise detection unit, and the control unit in the housing having the connection unit. Therefore, the predetermined electronic circuit that receives power supply from the power supply control unit includes the noise detection unit. Therefore, it is not necessary to provide control means, and for example, a car accessory or the like can be reduced in size. Further, it is possible to eliminate a malfunction caused by external noise mixed into a power supply line between the car accessory and the like which may be generated when the noise detection means is provided in the car accessory and the like.

  (12) Preferably, the control means of the power supply control device detects a spontaneous output signal from the vehicle-side computer via the in-vehicle communication network by the communication means, and generates the signal at the time of starting the vehicle from the voltage of the power supply terminal by the noise detection means. Detecting noise, transmitting a response request signal to the vehicle-side computer to the in-vehicle communication network by the communication means, detecting a response output signal to the response request signal from the vehicle-side computer by the communication means via the in-vehicle communication network, When a spontaneous output signal or a response output signal is detected from the in-vehicle communication network, supply of a power supply voltage to a predetermined electronic circuit may be started.

  For example, the control unit of the power supply control device first performs an operation of receiving a spontaneous output signal when the self-diagnosis signal from the vehicle-side computer is a CAN signal by the communication unit. The noise detecting means detects the noise generated at the time of starting the vehicle, and when the noise generated at the time of starting the vehicle is detected, the communication means sends a K-Line response request signal to the vehicle-side computer. Of the response output signal is detected. By detecting the wake-up of the vehicle-side computer in this manner, it is possible to prevent unnecessary power consumption by transmitting a K-Line response request signal while the vehicle-side computer is not operating.

  (13) Preferably, the control means of the power supply control device terminates the supply of the power supply voltage to the predetermined electronic circuit when the communication means cannot detect the spontaneous output signal or the response output signal from the in-vehicle communication network. Good.

  The control means of the power supply control device stops the supply of the power supply voltage to a predetermined electronic circuit when the spontaneous output signal or the response output signal cannot be detected, and when the vehicle-side computer stops operating, wastes power. Can be consumed.

(14) Preferably, the control unit of the power supply control device transmits the response request signal when the communication unit detects the spontaneous output signal and after the noise detection unit detects the noise. The switch may be turned on when a response output signal corresponding to is detected.
In this manner, in the power supply control device, whether the vehicle-side in-vehicle communication network outputs a spontaneous output signal from the vehicle-side computer or a type that outputs a response output signal, only one power supply control device is required to provide a predetermined electronic control signal. Supply power to the circuit.

(15) Preferably, the control means of the power supply control device sends a response request signal from the communication means, triggered by the noise detection means detecting noise generated at the time of starting the vehicle.
By doing so, the power supply control device sends a response request signal triggered by noise generated at the time of starting the vehicle. Therefore, when the in-vehicle communication network on the vehicle side outputs a response output signal, the communication control is reliably performed. The response request signal can be transmitted from the means.

(16) Preferably, the control means of the power supply control device includes a timer means for measuring a predetermined time, and a response output signal to the response request signal from the communication means within a predetermined time after transmitting the response request signal from the communication means. The switch may be turned on when is detected.
In this way, the power supply control device turns on the switch when the response output signal to the response request signal can be detected within the predetermined time from the communication means. Power can be supplied to the electronic circuit.

(17) Preferably, the control means of the power supply control device includes timer means for measuring a predetermined time, and the communication means can detect the next spontaneous output signal within a predetermined time after detecting the previous spontaneous output signal. It is advisable not to turn off the switch.
In this way, the power control device does not turn off the switch when the spontaneous output signal can be continuously detected within the predetermined time from the communication means. Power supply can be continued.

(18) Preferably, the control means of the power supply control device includes a timer means for measuring a predetermined time, and when the noise detection means can detect the next noise within a predetermined time after detecting the previous noise, The switch should not be turned off.
In this way, in the power supply control device, the switch is not turned off when the noise detection means can detect continuous noise such as alternator noise. Power supply to a predetermined electronic circuit can be continued.

  As described above, in the power supply control device according to the present invention, power can be supplied to a predetermined electronic circuit such as a car accessory from an accessory socket other than the accessory socket. Power supply power can be supplied to a predetermined electronic circuit.

It is a block diagram showing an example of an in-vehicle communication network connected with a power supply control device of the present invention. FIG. 1 is a block diagram illustrating a schematic configuration of an example of a power supply control device of the present invention. It is a figure showing arrangement of a terminal pin of an OBD connector.

<First embodiment>
The vehicle 1 shown in FIG. The rotating shaft of the engine 2 is connected to the alternator 3 by a belt or the like. The alternator 3 generates AC power by rotating an armature. The generated AC power is rectified to DC, and the DC output terminal is connected to the positive electrode of the battery 4. The positive electrode of the battery 4 is connected to a power output pin (for example, Pin 16 in FIG. 3 described later) of the OBD connector 6 in the vehicle. The power control device 30 is connected to the OBD in-vehicle connector 6, and the car accessory 20 is further connected to the power control device 30.

  An engine sensor 12 and an engine sensor 13 are connected to the engine 2. The engine sensor 12 is a sensor that measures the rotation speed of the engine 2, and the engine sensor 13 is a sensor that measures the temperature of the engine 2. The tire 8 is the previous tire, and the rotation sensor 10 is a sensor that detects the rotation of the tire 8. The tire 9 is a rear tire, and the rotation sensor 11 is a sensor that detects rotation of the tire 9.

  The in-vehicle communication network 7 is connected to the rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13, various sensors (not shown), and the like, and is also connected to the vehicle-side computer 5. When the ignition key of the vehicle 1 is turned on, the rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13 and the like and the vehicle-side computer 5 are energized and start operation. The in-vehicle communication network 7 transmits detection results of the rotation sensor 10, the rotation sensor 11, the engine sensor 12, the engine sensor 13, and the like to the vehicle-side computer 5. The vehicle-side computer 5 determines the state of the engine and the state of the vehicle based on the detection results from various sensors. The state of the vehicle includes that the vehicle is running on a battery and idling is stopped.

  The in-vehicle communication network 7 includes the case of CAN and K-Line described above, and also includes the case of a network of a vehicle manufacturer's own standard. For example, there are body-specific vehicle manufacturer's proprietary standard LIN (Local Interconnect Network), BEAN (Body Electronics Area Network), high-speed control system FlexRay, and information system MOST (Media Oriented System Transformer).

  When the in-vehicle communication network 7 is, for example, CAN, the above-mentioned signal indicating the state of the vehicle is spontaneously output from the vehicle-side computer 5 without receiving a response request signal from another. This signal is referred to as a spontaneous output signal in this specification. On the other hand, when the in-vehicle communication network 7 is, for example, K-Line, the above-mentioned signal indicating the state of the vehicle is output from the vehicle-side computer 5 as a response only when a response request signal from another is received. This signal is referred to as a response output signal in this specification. Whether the spontaneous output signal or the response output signal is output from the vehicle-side computer 5 depends on the connected network. A vehicle manufacturer's own standard network also outputs a spontaneous output signal or a response output signal.

  The power supply input side connection connector 31 in FIG. 2 is a connector on the power supply control device 30 side for connecting to the OBD vehicle interior connector. The power supply control device 30 receives supply of power from the battery 4 as a power supply via the power input side connection connector 31 and transmits and receives signals to and from the vehicle-side computer 5. The power output side connection connector 32 is a connector on the power supply control device 30 side for connecting to the power supply connection connector 21 of the car accessory 20. The power supply control device 30 supplies power to the car accessory 20 via the power supply output side connector 32.

Inside the power supply control device 30, power supply power supplied from a power supply is supplied to the noise detection unit 33 and the relay switch 36.
The signal transmitted from the vehicle-side computer 5 is input to the communication unit 34 via the in-vehicle communication network 7. Conversely, the communication unit 34 communicates with the vehicle-side computer 5 via the in-vehicle communication network 7. The power supply power output from the relay switch 36 is supplied to the car accessory 20. The control unit 35 is connected to the noise detection unit 33, the communication unit 34, and the relay switch 36, and the detection result of the noise detection unit 33, the communication result by the communication unit 34, and the time measurement result of the timer unit 37 in the control unit 35. To determine whether the relay switch 36 is to be turned ON or OFF, and outputs either ON / OFF signal. The relay switch 36 turns on / off the power supply voltage supplied from the power supply to the car accessory 20 according to this signal.

  The noise detection unit 33 includes an AC component passing circuit 41, a filter 42, an amplification circuit 43, a rectification circuit 44, and a DC conversion circuit 45, and detects noise from a power supply voltage. The noise is, for example, noise generated at the time of starting the vehicle 1 and superimposed on the power supply voltage. In the case of the vehicle 1 having the engine 2, the noise generated when the vehicle 1 starts and detected by the noise detection unit 33 is a noise including a voltage drop generated when the engine 2 starts. If the vehicle 1 is not the engine 2 but a battery of a hybrid vehicle driven by a motor or an electric vehicle, the noise generated at the start of the vehicle 1 and detected by the noise detection unit 33 is the vehicle 1 The noise may include a voltage drop generated when the power supply to the power supply is turned on.

  The AC component passing circuit 41 removes the DC voltage component from the output voltage of the battery 4 and passes only the AC component. The filter 42 is a filter that extracts only a signal of a target frequency band to be further detected from the AC component output from the AC component passing circuit 41. The AC component passing circuit 41 is used by selecting from a low-pass filter, a band-pass filter, and a high-pass filter according to a target frequency to be detected. For example, the alternator noise component that changes in proportion to the engine speed is approximately 800 Hz to 8 KHz, and the noise component at the time of power ON / OFF of electrical components such as an air conditioner, headlights and horn is more than the alternator noise. Is a high frequency band, the fluctuation component of the power supply voltage is a low band of several hundred Hz or less, and the voltage drop when the ignition key is turned on is a frequency in a lower band. In both the case where the vehicle 1 has the engine 2 and the case where the vehicle 1 is an electric vehicle, the noise including the voltage drop has a low band frequency, and thus can be detected by one filter. Hereinafter, when the target frequency to be detected turns on the ignition key (when the vehicle 1 is driven by the motor instead of the engine 2 (if the vehicle is running on a battery of a hybrid vehicle or an electric vehicle), the motor is started). The case where the frequency is the voltage drop will be described.

  The signal in the frequency band to be detected output from the filter 42 is amplified by the amplifier circuit 43, rectified by the rectifier circuit 44, converted into a DC voltage by the DC converter circuit 45, and output to the controller 35 as a control signal. . The noise detection unit 33 can accurately detect the start of the vehicle 1 having the engine 2 by using a filter capable of detecting noise in a low-band frequency including a voltage drop in the filter 42, and can also detect the start of the vehicle 1 of the electric vehicle. Starting can also be accurately detected. The control signal output from the control unit 35 is either a high-level voltage signal or a low-level voltage signal with respect to a threshold value for turning on / off the relay switch 36. For example, when a high-level voltage signal is input, the ignition key is turned on to start the engine (when the vehicle 1 is driven by a motor instead of the engine 2 (during battery driving of a hybrid vehicle or In the case of an electric vehicle), since the motor is started), the control unit 35 outputs a signal for turning on the relay switch 36. On the other hand, when the low-level voltage signal is input, when the ignition key is OFF (however, only when the vehicle-side computer 5 is ON) or when the ignition key is kept ON (including during idling stop) 1 is driven by a motor instead of the engine 2 (if the vehicle is running on a battery of a hybrid vehicle or an electric vehicle, if the motor is stopped), the control unit 35 The following judgment is made based on the input from the control unit 34 and the measurement result of the timer unit 37.

  When the control unit 35 is connected to the vehicle-side computer 5 via the in-vehicle communication network 7, the control unit 35 determines whether the in-vehicle communication network 7 is a network that outputs a spontaneous output signal from the vehicle-side computer 5 in advance or responds to a response request signal. It is checked whether the network is a network that outputs a response output signal. If it is necessary for the in-vehicle communication network 7 to output a response request signal using, for example, a K-Line or the like, communication is performed every predetermined time measured by the timer unit 37. The unit 34 outputs a response request signal to the in-vehicle communication network 7. The predetermined time is determined by a standard / regulation for each type of the in-vehicle communication network 7.

  Further, the control unit 35 determines whether or not the vehicle 1 is in a driving state based on a signal received from the vehicle-side computer 5 by the communication unit 34 via the in-vehicle communication network 7. The control unit 35 controls ON / OFF of the relay switch 36 using the received signal from the vehicle-side computer 5 and the noise detected by the noise detection unit 33. For example, the control unit 35 can determine that the vehicle 1 is in a driving state when a signal from the vehicle-side computer 5 can be received, even when the noise generated when the vehicle 1 is started is not detected by the noise detection unit 33. Therefore, a signal for turning off the relay switch 36 is not output. Therefore, the power supply control device of the present embodiment can supply the power supply voltage to the car accessory even during battery running or idling stop.

The control unit 35 operates at least as follows.
(A) The communication unit 34 performs an operation of receiving (detecting) a spontaneous output signal from the vehicle-side computer 5 via the in-vehicle communication network 7 when, for example, the self-failure diagnosis signal is a CAN signal. In the case where is not received, the following operation (b) is performed.
(B) The noise that is generated at the time of starting the vehicle 1 is detected by the noise detection unit 33 from the voltage of the power supply terminal. When the noise that is generated at the time of starting the vehicle 1 is detected, the following operation (c) is performed.
(C) The communication unit 34 sends, for example, a K-Line response request signal to the vehicle-side computer 5 to the in-vehicle communication network 7. That is, the control unit 35 sends a response request signal from the communication unit 34 to the vehicle-side computer 5 via the in-vehicle communication network 7 by using the noise detection unit 33 detecting noise generated at the time of starting the vehicle 1 as a trigger.
(D) The wake-up of the vehicle-side computer 5 is detected by detecting the response output signal (for the response request signal) from the vehicle-side computer 5 via the communication network 34 by the communication unit 34.
(E) When the spontaneous output signal or the response output signal is detected from the in-vehicle communication network 7, the supply of the power supply voltage to the car accessory 20 is started.

  As described above, the control unit 35 transmits the response request signal from the communication unit 34 by using the noise as a trigger after the noise detection unit 33 detects the noise generated at the time of starting the vehicle 1, whereby the in-vehicle communication on the vehicle 1 side is performed. When the network 7 is of a type that outputs a response output signal, it is possible to reliably transmit a response request signal from the communication unit 34.

  Further, the control unit 35 detects a response output signal corresponding to a response request signal when the communication unit 34 detects a spontaneous output signal and a noise detection unit 33 that detects a noise generated at the time of starting the vehicle 1. By turning on the relay switch 36, a response request signal of K-Line is sent out when the in-vehicle communication network 7 is CAN and when the vehicle-side computer 5 in which the vehicle 1 is not started is not operating, thereby wasting power. It can be prevented from being consumed, and whether the in-vehicle communication network 7 of the vehicle 1 outputs a spontaneous output signal from the vehicle-side computer 5 or a type that outputs a response output signal to the car accessory 20 with only one power supply control device 30 Power supply can be supplied.

  Further, the control unit 35 includes a timer unit 37 for measuring a predetermined time. After transmitting a response request signal from the communication unit 34 with the noise detected by the noise detection unit 33 as a trigger, the timer unit 37 measures the time. Then, when the timing at which the communication unit detects a response output signal to the response request signal is within a predetermined time specified by the timer unit 37, the relay switch is turned on. Thus, power can be supplied to the car accessory 20 even when noise is not detected by the noise detection unit 33 such as during battery running or idling stop.

  When the communication unit 34 detects the spontaneous output signal, the timer unit 37 measures the time since the communication unit 34 detects the spontaneous output signal. When the communication unit 34 detects the next spontaneous output signal within a predetermined time, the control unit 35 continues to turn on the relay switch 36 and does not turn it off. If the in-vehicle communication network 7 is a CAN or the like, the spontaneous output signal from the vehicle-side computer 5 is output within a predetermined time, so the time interval from the previous spontaneous output signal to the next spontaneous output signal is If the relay switch 36 is not turned off within a predetermined time specified by the standard, the power supply to the car accessory 20 can be continued even while the battery 4 is running or idling is stopped.

  When the communication unit 34 cannot detect the spontaneous output signal or the response output signal from the in-vehicle communication network 7, the control unit 35 controls the relay switch 36 to terminate the supply of the power supply voltage to the car accessory 20. Since the supply of the power supply voltage to the car accessory 20 is stopped, useless power can be prevented from being consumed when the vehicle 1 is not in operation or the like and the vehicle-side computer 5 does not operate.

  The connector of the OBD in-vehicle connector 6 is, for example, a SAE J1962 standard link connector (DLCs) as shown in FIG. There are two types of DLC connectors, Type A and Type B. Type A is installed within a range that is accessible from the driver's seat and within one foot (about 30 cm) of the car instrument panel (near the steering column). Type B is accessible from the driver's seat or the passenger's seat and is installed within a range of 2.5 feet (about 75 cm) from the instrument panel of the car (such as near the center console). The type of the in-vehicle communication network 7 can be known from the pin arrangement (the presence or absence of a pin at each position) of the DLC connector shown in FIG. If there is a terminal pin of Pin 7 of the OBD in-vehicle connector 6, it can be determined that it is connected to K Line. If the terminal pins of Pin 6 and Pin 14 of the OBD in-vehicle connector 6 are present, it can be determined that they are connected to CAN.

  The method of determining the signal received from the vehicle-side computer 5 is determined by first determining which terminal pin of the OBD connector 6 in FIG. 3 is the signal. For example, when the in-vehicle communication network 7 is CAN, the terminal pins of the pin 6 (CAN High (J-2284) (3.5 to 2.5 V)) of the OBD in-vehicle connector 6 and the terminal pins of the Pin 14 (CAN Low (J-2284)). ) (2.5 to 1.5 V)). When this signal is input to the communication unit 34, the control unit 35 determines that it is a CAN signal based on the input of Pin 6 and Pin 14, for example, and determines the level of each CAN signal of Pin 6 and Pin 14 (Pin 4 shear). The signal is output from the vehicle-side computer 5 by analyzing the source address and the like included in the header of each received CAN signal, and determining whether the signal is output from the vehicle-side computer 5. When it is confirmed that the vehicle-side computer 5 wakes up, the control unit 35 outputs a signal for turning on the relay switch 36 and supplies the power supply voltage of the terminal pin (Battery Power) of the Pin 16 to the car accessory 20. .

  For example, when the in-vehicle communication network 7 is a K-Line, the control unit 35 transmits a response request signal for the vehicle-side computer 5 from the communication unit 34 to a terminal pin (ISO9141-2K Line) of Pin 7 of the OBD in-vehicle connector 6. Then, the timer unit 37 is activated and waits for a response output signal from the vehicle-side computer 5. When a signal from the vehicle-side computer 5 is input, the control unit 35 determines that the signal is a K Line signal from the input of the Pin 7 to the communication unit 34, for example, and changes the level of the K Line signal to the chassis ground of the Pin 4 When the signal is received within a predetermined time defined in the K-Line standard from the time from transmission of the response request signal measured by the timer unit 37 to input of the signal, Judge as a response output signal. In order to more reliably confirm that the received signal is a response output signal from the vehicle-side computer 5, a source address or the like included in the header of each received K Line signal may be analyzed. When it is confirmed that the vehicle-side computer 5 wakes up, the control unit 35 outputs a signal for turning on the relay switch 36 and supplies the power supply voltage of the terminal pin (Battery Power) of the Pin 16 to the car accessory 20. .

  The OBD in-vehicle connector 6 as shown in FIG. Normally, it is not easy to connect to the in-vehicle communication network 7 and connect to a power source other than a cigarette lighter (accessory socket). However, like the power input side connection connector 31 of the present embodiment, a connection terminal for the in-vehicle communication network 7 is used. And connection means for connecting to the OBD connector 6 for self-diagnosis including a power supply terminal and a supply terminal for a power supply, so that the user can connect and disconnect the power supply by himself / herself even if the user has no knowledge of the wiring inside the vehicle. Can be installed without having to go to a maintenance shop.

  A general car accessory is connected to a cigar lighter (accessory socket) or a power supply line of the vehicle 1. In order to prevent the battery of the parked vehicle from being exhausted by the car accessory, for example, it is necessary to provide the noise detection unit 33 and the relay switch 36 inside the car accessory. On the other hand, in the present embodiment, as shown in FIG. 2, a communication unit 34 and a noise detection unit are provided in a housing of the power supply control device 30 having the connection means power supply input connector 31 and power supply output connector 32. 33, a control unit 35, a relay switch 36, and a timer unit 37. This eliminates the need to provide the noise detection unit 33 and the like in the car accessory 20 that is supplied with power from the power supply control device 30, makes it possible to reduce the size of the car accessory 20, and reduces external noise on the power supply line between the car accessory 20. Can be prevented from malfunctioning due to the mixing of

  As described above, the ON / OFF control of the power supply voltage supplied to the car accessory 20 is not determined only by noise as in the related art, and a signal output from the vehicle-side computer 5 to the in-vehicle communication network 7 when noise cannot be detected is also used. This makes it possible to determine that the vehicle 1 is running on the battery 4 or idling stop, which was not possible in the past. Therefore, in the hybrid car (HV) or the vehicle 1 with the engine 2 having the idling stop function, the power supply to the car accessory 20 can be reliably supplied even if the function of stopping the engine during driving can be used. The noise detection unit 33 can accurately detect not only the restart of the vehicle 1 but also the start of the vehicle 1 by running the battery.

<Second embodiment>
For example, when the vehicle 1 has a security function such as an immobilizer, in order to generate noise including a voltage drop at the time of starting from the vehicle 1, it is necessary to release the security function of the vehicle 1 and start the vehicle. Otherwise, the security function of the vehicle 1 will erroneously determine that the process to be started is stolen or the like.

  For example, the control unit 35 of the second embodiment is not output from the vehicle-side computer 5 when the security function of the vehicle 1 is turned on and the traveling cannot be started, and the security function is turned off and the traveling can be started. A predetermined signal output from the vehicle-side computer 5 only at this time is detected via the communication unit 34. The control unit 35 confirms that the communication unit 34 has received the predetermined signal from the vehicle-side computer 5, that is, the communication unit 34 is in a state where it can receive the predetermined signal from a state where it cannot be received. When the noise detection unit 33 detects noise generated at the time of starting the vehicle 1, a signal for turning on the relay switch 36 is output. Thereby, erroneous determination of the security function can be reliably prevented.

<Third embodiment>
The vehicle 1 is usually equipped with a plurality of in-vehicle communication networks 7. The plurality of in-vehicle communication networks 7 are, for example, the above-described CAN, K Line, and original standards (LIN, BEAN, etc.) of each manufacturer. The in-vehicle communication network 7 of each manufacturer's own standard is either a type that outputs a spontaneous output signal or a type that outputs a response output signal. The communication unit 34 of the third embodiment includes both the in-vehicle communication network 7 that outputs a spontaneous output signal from the vehicle-side computer 5 and the in-vehicle communication network 7 that outputs a response output signal from the vehicle-side computer 5 unlike the above. It is connected. The communication unit 34 communicates with the vehicle-side computer 5 via one of the two in-vehicle communication networks 7 described above. Which of the in-vehicle communication networks 7 the vehicle-side computer 5 is connected to depends on the manufacturer and the vehicle type.

  The power supply control device 30 that supplies power to the car accessory needs to be versatile because the type of vehicle to be installed is not limited. To be versatile is to be able to support both the in-vehicle communication network 7 for spontaneous output signals and the in-vehicle communication network 7 for response output signals. More specifically, at least the communication unit 34 can be connected to the in-vehicle communication network 7 for the spontaneous output signal and the in-vehicle communication network 7 for the response output signal. In this way, in the case of the present embodiment, even with one power supply control device 30, the vehicle communication network 7 can use the spontaneous output signal for both the vehicle type and the response output signal. Power supply power can be supplied to the car accessory 20.

<Fourth embodiment>
In the fourth embodiment, in addition to the configuration in which the communication unit 34 can connect to and communicate with a plurality of different in-vehicle communication networks 7 as in the above-described third embodiment, the control unit 35 It monitors a plurality of different connected in-vehicle communication networks 7. The control unit 35 detects which of the plurality of different in-vehicle communication networks 7 the in-vehicle communication network 7 with which the communication unit 34 can communicate with is detected, and the in-vehicle communication network with which the communication unit 34 can communicate. 7, the ON / OFF of the relay switch 36 is determined.

  Since the control unit 35 of the present embodiment can detect and use the communicable in-vehicle communication network 7 among the plurality of different in-vehicle communication networks 7 connected to the communication unit 34, the control unit 35 can use various in-vehicle communication networks 7 Power supply power can be supplied to the car accessory 20 with only one power supply control device 30 for the vehicle type.

<Fifth embodiment>
When the battery of the electric vehicle EV or the hybrid car (HV) is running on a battery, or when the vehicle with the engine is idling stopped, noise from the engine is not generated, so that the noise detection unit 33 does not detect the noise. Therefore, the control unit 35 of the fifth embodiment does not use the output signal of the noise detection unit 33, turns on the relay switch 36 when receiving the signal from the vehicle-side computer 5, and receives the signal from the vehicle-side computer 5 When it is no longer possible, the relay switch 36 is turned off. That is, the control unit 35 of the present embodiment turns on the power supply voltage to be supplied to the car accessory 20 when the signal from the vehicle-side computer 5 is received, not when the noise is detected from the power-supply voltage. The power supply voltage supplied to the car accessory 20 when a signal cannot be received is controlled to be OFF.

  When a signal from the vehicle-side computer 5 can be received, the vehicle-side computer 5 is naturally supplied with power and wakes up. When the vehicle-side computer 5 wakes up, it is considered that there is a demand for a car accessory while the vehicle is running or the occupant is in the vehicle 1 and the ignition key is turned on. The signal from the vehicle-side computer 5 can be determined using the method described in the first embodiment. As described above, by turning on the power supply voltage supplied to the car accessory 20 when the vehicle-side computer 5 is awake, even if the vehicle is a hybrid car (HV) or an automobile having an idling stop function, When there is an occupant in the vehicle 1, the car accessory 20 can be used.

<Sixth embodiment>
For example, the vehicle 1 is equipped with the engine 2, and the timer unit 37 measures the period of the maximum generation interval of the noise generated by the armature of the alternator which fluctuates according to the engine speed as a predetermined time, and the filter of the noise detection unit 33. Reference numeral 42 changes to a filter that matches the noise frequency of the alternator. In the control unit 35, if the noise detection unit 33 can detect the next noise within a predetermined time after the noise detection unit 33 detects the previous noise, the relay switch 36 is not turned off. To do.

In the case of the present embodiment, the relay switch 36 is not turned off while the noise detection unit 33 is detecting continuous noise such as alternator noise. Therefore, in the vehicle 1 including the engine 2, power can be continuously supplied to the car accessory 20 while the engine 2 is running.
<Another embodiment>
(1) The power control device 30 may be provided inside the car accessory. For example, the power supply control device 30 may be provided inside the body of a car accessory such as a radar detector or a fuel economy meter.
(2) The power supply control device 30 may be provided in a housing integrated with the OBD vehicle interior connector 6.
(3) The power source is not limited to the one obtained from the OBD in-vehicle connector 6, but may adopt various configurations such as a configuration in which the power source is obtained directly from the battery.

1 vehicle,
2 engine,
3 Alternator,
4 Battery,
5 vehicle side computer,
6 OBD (On-Board diagnostics) in-vehicle connector,
7 In-vehicle communication network,
8, 9 tires,
10, 11 rotation sensor,
12, 13 Engine sensor (vibration, heat, rotation),
20 car accessories,
21 power supply connector,
30 power control device,
31 power input side connector,
32 power output side connector,
33 noise detection unit (noise detection means),
34 communication unit (communication means),
35 control unit (control means),
36 relay switch (switch),
37 timer section (timer means),
41 AC component passing circuit,
42 filters,
43 amplifying circuit,
44 rectifier circuit,
45 DC conversion circuit.

Claims (1)

Power supply control including connection means connected to a vehicle which needs to start the vehicle by releasing the security function of the vehicle, and controlling supply of electric power supplied from the vehicle to the car accessory via the connection means A device,
Control for starting supply of electric power supplied from the vehicle to the car accessory via the connection means when a noise generated at the time of starting the vehicle is detected after receiving a predetermined signal from the vehicle. equipped with a line intends function,
As a predetermined signal from the vehicle, said when the security function of the vehicle is in the running start impossible state on is a signal that is not output from the vehicle computer, the travel start state security feature is off of the vehicle power supply control device which is characterized by using a signal outputted from the vehicle computer to a time.

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