JP4969183B2 - In-vehicle system - Google Patents

Description

  The present invention relates to an in-vehicle system including a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line. In particular, the present invention relates to an in-vehicle system that suppresses power consumption while maintaining convenience.

  In recent years, the number of electrical components such as electronic control units (ECUs), which are power loads mounted on vehicles, has been increasing due to various advantages such as safety, convenience, comfort and product power. As the number of electrical components increases, the amount of power consumed not only while driving but also when parked is increasing. In addition, with the diversification of life in recent years, there has been a great diversification of requirements for the usage methods of vehicles and further the usage methods of electrical components while riding.

Patent Document 1 discloses a technique for supplying power to individual electrical components regardless of the position of a key switch (ignition switch).
JP-A-5-139220

  However, each electrical component is pre-set to operate depending on the position of the ignition switch, so power will be supplied not only to the desired electrical component but also to unnecessary electrical components. There is a problem that leads to. Depending on the power consumption state, there is a risk that the remaining amount of power of the lead storage battery mounted as a power source in the vehicle becomes less than the minimum necessary power required for starting the engine.

  Since the technique for supplying power to each electrical component disclosed in Patent Document 1 is a technique that assumes an operation check of the electrical component on the assembly line of the vehicle, an abnormality related to the remaining amount of power is not considered. Therefore, even if the technique disclosed in Patent Document 1 is applied to a vehicle that is generally used, there is a possibility that the power supply of individual electrical components causes an abnormality in which the remaining amount of power is less than the minimum required power. is there.

When the power source is a lead-acid battery, the power of the power source is charged by the operation of the vehicle engine, and it is possible to prevent the remaining amount of the power source from being less than the minimum required power. When the engine is started in a stopped state, there is a problem that it adversely affects the natural environment and the residential environment, such as emission of exhaust gas such as CO ₂ and NO _x , and generation of noise. As a specific example, the number of vehicles parked and parked around the cram school to transfer children to the cram school is increasing, and parents who ride in each vehicle are equipped with electrical equipment such as televisions, audio equipment, and air conditioners. When the engine is operated to operate the engine, exhaust gas and engine noise are generated, and a social problem in which the living environment of surrounding residents deteriorates can be raised.

  The present invention has been made in view of such circumstances, and a plurality of connection devices such as junction boxes used for connection of a power supply line and a signal line are arranged in a vehicle, and a request for power supply to each power load is provided. When receiving the request, the connected device that has received the request determines whether or not power can be supplied, and then determines whether or not power can be supplied to the power load. It is an object of the present invention to provide an in-vehicle system that prevents the remaining amount of electricity from becoming less than the minimum required power and further prevents adverse effects on the natural environment and the residential environment.

An in-vehicle system according to a first aspect of the present invention includes a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of powers connected to the connection device by a power supply line. In an in-vehicle system comprising a load, the power supply to one power load connected to any one of the connection devices, an individual power supply request unit that requests the connection device connected to the power load, Each connection device includes a means for receiving a power supply request from an individual power supply request unit connected to itself, a determination means for determining whether power supply is possible in response to a power supply request, It is characterized by comprising means for supplying power to the load and means for supplying power to the power load when a request for emergency power supply is received from the individual power supply request unit when it is determined that power supply is not possible .

  In the present invention, when the connection device that has received a power supply request from the individual power supply request unit determines whether or not individual power supply to the power load is possible, only when it is determined that power supply is possible only to the necessary power load. Since power can be supplied, it is possible to prevent the consumption of more power than necessary, and it does not allow unlimited power supply, thus preventing the remaining power from being less than the minimum required power. Is possible.

  The in-vehicle system according to a second aspect of the present invention is the in-vehicle system according to the first aspect, wherein each of the connection devices further includes means for acquiring a power supply state related to power supply related to the other connection device through communication with the other connection device. The means is configured to determine whether or not power supply is possible based on the acquired power supply state and the amount of electricity supplied to the power load. When the determination result indicates that power supply is possible, the acquired power supply state and power The power supply time is calculated based on the amount of electricity supplied to the load.

  In the present invention, for all connected devices to which a power load is connected, the current power consumption, the integrated value of the supplied power, the state related to power supply such as the remaining amount, and the amount of electricity such as the amount of power supplied to the power load Based on the above, it is possible to realize highly accurate power management by calculating the state of power consumed by power supply with high accuracy and calculating the power supply time when it is determined that power supply is possible.

  In the in-vehicle system according to a third aspect of the present invention, in the first aspect or the second aspect, the connection device outputs a notification signal indicating that power feeding is not possible to a predetermined power load when the determination unit determines that power feeding is not possible. The apparatus further comprises means.

  In the present invention, the passenger can grasp the state of the power source by outputting a notification signal to a predetermined power load such as an LED or a liquid crystal panel.

  The in-vehicle system according to the present invention includes a plurality of connection devices such as a junction box connected to a power supply line for supplying power and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line, An individual power supply requesting unit such as a push button switch for requesting power supply to one power load connected to any one of the connection devices to the connection device connected to the power load is disposed in the vehicle. Then, the connection device determines whether or not power supply is possible in response to the power supply request from the individual power supply request unit, and supplies power to the power load when the determined result indicates that power supply is possible.

With this configuration, according to the present invention, power can be supplied only to a necessary power load when it is determined that power can be supplied. Therefore, it is possible to prevent consumption of power more than necessary, and power can be supplied indefinitely. Since it does not permit, it is possible to prevent the remaining amount of the power source from being less than the minimum required power, and so on. In the present invention, since it is possible to prevent the consumption of electric power more than necessary, it is not necessary to charge the power source by operating the vehicle engine when parking or stopping, so that exhaust gases such as CO ₂ and NO _x are discharged. It has excellent effects such as being able to prevent adverse effects on the natural environment and the residential environment such as noise generation.

  In addition, the present invention acquires the state of power supply such as the current power consumption, the integrated value of the supplied power, the remaining amount, etc. for all connected devices to which the power load is connected. Based on the amount of electricity such as the amount of power supplied to the load, the power consumption consumed by the power supply is calculated with high accuracy. Excellent effects such as being able to realize management.

  Furthermore, when the present invention determines that power feeding is not possible, the notification signal is output to a predetermined power load such as an LED or a liquid crystal panel so that the passenger can grasp the state of the power source. There is an effect.

  And in this invention, although comprised so that a some connection apparatus may be used, compared with the case where one connection apparatus is used, it can respond easily to the increase in electric power load, and electric power load When the communication process is performed, various mechanisms related to the communication process are started in connection device units, so that it is possible to suppress the power consumption, and the excellent effects are obtained.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a block diagram illustrating a configuration example of an in-vehicle system according to the present invention. In FIG. 1, reference numeral 1 denotes a vehicle. The vehicle 1 is equipped with a plurality of connection devices 2, 2,... Such as a junction box, a relay box, and a fuse box that relay and distribute DC power and communication signals. Each of the connection devices 2, 2,... Is connected by a power supply line that supplies power and a signal line that transmits a signal. 1 shows a configuration example in which connecting devices 2, 2,... Are arranged in the front engine room, in the vicinity of the driver's seat, in the vicinity of the front passenger seat, and in the rear trunk room in the vehicle 1, respectively. Each of the connection devices 2, 2,... Has one or a plurality of power loads 3, 3,... That are configured by electrical components such as an electronic control unit (ECU) with a power supply line and a signal line. It is connected. Note that the one power load 3 here does not necessarily correspond to one electric component, and one electric load 3 may be constituted by a plurality of interlocked electric components. That is, one power load 3 indicates one or a series of interlocking electrical components.

  A power supply 4 using a lead storage battery for supplying DC power is connected to the connection device 2 disposed in the engine room via a power supply line, and a voltmeter, current for detecting the remaining power of the power supply 4 A power sensor 4 a such as a meter or a hydrometer is attached, and the power sensor 4 a is connected to the connection device 2 through a signal line. In addition, various power loads 3, 3,... Such as a front right headlight are connected to the connection device 2 disposed in the engine room.

  The connection device 2 disposed in the vicinity of the driver's seat includes various mechanisms related to the driver's side door such as a power window mechanism, a door lock mechanism, and a door mirror mechanism, and a power remaining amount display monitor that indicates the remaining amount of the power source 4. Various power loads 3, 3,... Such as various instrument mechanisms, an external power feeding mechanism such as an accessory socket, an audio visual related mechanism, and a navigation mechanism are connected. Further, individual power supply switches (individual power supply request units) 5, 5,... Such as pushbuttons for individually operating the respective power loads 3, 3,... Connected to the connection device 2 disposed in the vicinity of the driver's seat are disposed. Further, a display unit such as an LED or a liquid crystal monitor for notifying the driver that the operation by the individual power supply switches 5, 5,. Note that a detection mechanism 6 for detecting the position of the ignition switch is connected to the connection device 2 disposed in the vicinity of the driver's seat.

  The connection device 2 disposed in the vicinity of the front passenger seat includes various mechanisms related to the front passenger side door such as a front left headlight, an illumination mechanism such as a room light, a power window mechanism, a door lock mechanism, and a door mirror mechanism. .. Are connected. Further, individual power supply switches 5, 5,... For individually operating the power loads 3, 3,... Connected to the connection device 2 disposed in the vicinity of the passenger seat are disposed.

  The connection device 2 disposed in the trunk room includes an illumination mechanism such as a rear light, a power window mechanism, a door lock mechanism, various mechanisms related to a door on the passenger side such as a door mirror mechanism, and a television disposed in a rear seat. Various power loads 3, 3,... Such as an audio visual mechanism are connected. Further, individual power supply switches 5, 5,... For individually operating the power loads 3, 3,... Connected to the connection device 2 disposed in the trunk room are disposed.

  Next, the configuration of each of the connection devices 2, 2,. FIG. 2 is a block diagram showing a configuration example of the connection device 2 used in the in-vehicle system of the present invention. The connection device 2 includes a first connection mechanism 21 that accommodates a signal transmission / reception circuit and a power supply circuit, a second connection mechanism 22 that accommodates a power supply line for constant power supply and a fuse incorporated in the power supply line, and a power supply that performs power supply control. A control mechanism 23 is provided.

  The first connection mechanism 21 includes contact / separation means 210 including a transmission / reception circuit and a power supply circuit. The contact / separation means 210 is a control means 211 such as a microcomputer that controls transmission / reception of signals using the transmission / reception circuit and contact / separation by the power supply circuit. And a recording means 212 such as an EEPROM for recording various data used for the control of the control means 211.

  The connection device 2 includes a power supply line L1 that receives power supply directly from the power supply 4 or indirectly through the other connection devices 2, 2,..., And a power supply line that transmits the received power to the other connection devices 2, 2,. Signals are received from L2, signal lines L3 for transmitting / receiving signals to / from other connection devices 2, 2,..., Power lines L4, L4,. The signal lines L5, L5,..., And a signal line L6 for receiving a position signal indicating the position of the ignition switch from the detection mechanism 6 are connected to various power supply lines and signal lines. It is contacted and separated by. The connecting device 2 and the power load 3 may be connected by a power supply line and a signal line, and a signal from the individual power supply switch 5 may be received via the signal line.

  In the recording means 212, as information required for control of the control means 211, information required for transmission / reception of signals, and each power load 3, 3,... Associated with identification information identifying each power load 3, 3,. Various kinds of information such as information on the power supply is recorded. Information on power supply to each power load 3, 3,..., Information indicating power consumption of each power load 3, 3,..., Contact / separation (on / off) with each power load 3, 3,. Information such as information indicating the power supply state can be given.

  The power supply control mechanism 23 includes a control unit 230 that controls power supply by the first connection mechanism 21 and a recording unit 231 that records various programs and data required for the control of the control unit 230. The recording means 231 includes the remaining amount of power of the power supply 4 received from the power sensor 4a via the signal line L3, the integrated value of the power supplied to each power load 3, 3,. Information such as the state and power consumption of each power load 3, 3,... Is recorded. Each of the power loads 3, 3,... Whose information is recorded in the recording means 231 is connected not only to the power loads 3, 3,. Also included are power loads 3, 3,.

  Next, processing of various devices used in the in-vehicle system according to the present invention will be described. FIG. 3 is a flowchart illustrating an example of the power feeding control process of the connection device 2 included in the in-vehicle system of the present invention. When the passenger boarding the vehicle 1 wishes to supply power only to the unpowered power load 3 when the ignition switch is in the OFF (OFF) position or the accessory (ACC) position, the power load 3 A power supply request is made by operating the individual power supply switch 5 that supplies power only to the power supply. For example, when the ignition switch is in the off position and the user desires to supply power to the television disposed in the rear seat, the passenger presses the individual power supply switch 5 that requires power supply only to the power load 3. Perform the operation.

  The individual power supply switch 5 receives a passenger's operation and sends a power supply request signal for requesting power supply only to the corresponding power load 3 to the connected connection device 2.

  The connection device 2 receives a power supply request signal under the control of the control unit 211 (step S1), and communicates with the other connection devices 2, 2,. , 2,... (Step S2), and further, the power consumption status of each of the power loads 3, 3,... Connected to itself is acquired (step S3). Such a state is acquired from the power sensor 4a (step S4).

  In step S2, the power consumption status of the other connection devices 2, 2,... To be acquired is the current status of supply to the connected power loads 3, 3,. Power consumption and the integrated value of the supplied power. In step S <b> 3, the acquired power consumption status is, for example, the current power consumption and the integrated value of the supplied power, and is recorded in the recording unit 231. The connection device 2 can recognize the current power consumption amount from the total value of the power amount currently supplied to each power load 3, 3,... The total amount of supplied power can be recognized from the integrated value of the amount of power supplied to each power load 3, 3,. Furthermore, in step S4, the state relating to the remaining amount of the power source 4 to be acquired is, for example, a measured value of voltage, current, specific gravity, or the like obtained by directly measuring the power source 4, or a value obtained by converting the measured value into a predetermined index. The acquisition of the consumption status in step S2 and the state of the power source 4 in step S4 are separately acquired and recorded in the recording unit 231 and read from the recording unit 231 at the timings of step S2 and step S4. Also good.

  Then, the connection device 2 determines whether or not power supply is possible based on the state of the power supply 4 and the amount of power supplied to the power load 3 under the control of the control unit 230 (step S5), and determines that power supply is possible (step S5). : YES), the supply time is calculated based on the state of the power source 4 and the amount of power supplied to the power load 3 (step S6).

  In step S5, the state of the power source 4 is the remaining amount of power of the power source 4 calculated from the various information acquired in steps S2 to S4. The amount of power supplied to the power load 3 is a request for power supply. This is the amount of power to be supplied to the power load 3 being recorded, and is recorded in the recording means 231 in advance. Moreover, the power consumption in the case where supply of electric power is permitted can be predicted from the information acquired in steps S2 to S3 and the electric power to be supplied to the power load 3. Then, the total amount of power that can be supplied to the power load 3 is calculated with respect to the remaining amount of power of the power source 4 and the predicted power consumption, and the calculated power amount and the power consumption per unit time of the power load 3 Are compared to determine whether or not power supply is possible, and when power supply is permitted, the power supply time is calculated by dividing the total amount of power that can be supplied by the power consumption per unit time. Note that it is possible to determine whether or not to supply power and calculate the supply time by using an amount of electricity such as current instead of electric power.

  Then, under the control of the control unit 211 and the control unit 230, the connection device 2 starts power supply to the power load 3 related to the individual power supply switch 5 that is the transmission source of the power supply request signal, with the calculated power supply time as an upper limit (step S7). ). In step S7, power feeding only to the power load 3 is started regardless of the position of the ignition switch. In addition, when the time after starting the electric power feeding to the electric power load 3 reaches the upper limit time, the electric power feeding to the electric power load 3 is stopped. Further, when power supply is stopped, for example, a message is displayed from a display unit connected to the connection device 2 and a predetermined output such as lighting of a warning lamp is performed to notify the passenger.

  If it is determined in step S5 that power feeding is not possible (step S5: NO), the connection device 2 performs a predetermined warning output such as displaying a message from the display unit indicating that power feeding is not possible and lighting a warning lamp ( Step S8), the power supply to the power load 3 is not started, and the process is terminated. However, even if the determination result is that power supply is not possible, when a predetermined emergency operation such as long pressing of the individual power supply switch 5 is performed, power supply to the power load 3 is started regardless of the determination result. For example, when an abnormal situation occurs such that the door cannot be opened due to some kind of trouble, even if the power of the power source 4 is exhausted, the power load 3 that is a power window mechanism must be supplied, and the power window must be opened to escape from the vehicle. This is because the occurrence of a state where it is not possible is considered.

  The number, arrangement, number of electric loads, arrangement, and other various conditions shown in the above embodiment are merely examples, and can be appropriately designed according to various factors such as the vehicle and system configuration.

It is a block diagram which shows the structural example of the vehicle-mounted system of this invention. It is a block diagram which shows the structural example of the connection apparatus used with the vehicle-mounted system of this invention. It is a flowchart which shows an example of the electric power feeding control process of the connection apparatus with which the vehicle-mounted system of this invention is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Connection apparatus 3 Electric power load 4 Power supply 5 Individual feed switch

Claims (3)

In an in-vehicle system comprising a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line,
An individual power supply request unit that requests power supply to one power load connected to any of the connection devices to the connection device connected to the power load;
Each of the connection devices is
Means for receiving a power supply request from an individual power supply request unit connected to the device;
A determination means for determining whether or not power supply is possible in response to a request for power supply;
Means for supplying power to the power load when it is determined that power supply is possible ;
A vehicle-mounted system comprising: means for supplying power to a power load when a request for emergency power supply is received from the individual power supply request unit when it is determined that power supply is not possible . Each of the connecting devices is
Means further comprising means for acquiring a state of a power supply related to power supply related to the other connection device by communication with the other connection device;
The determination means is configured to determine whether or not power supply is possible based on the acquired power supply state and the amount of electricity supplied to the power load.
The in-vehicle configuration according to claim 1, wherein when the determination result indicates that power supply is possible, the power supply time is calculated based on the acquired power supply state and the amount of electricity supplied to the power load. system.   The said connection apparatus is further provided with a means to output the notification signal which shows that electric power feeding is impossible to the predetermined | prescribed electric power load, when the said determination means determines with electric power feeding impossible. In-vehicle system.

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