JP6499912B2 - Vehicle network system - Google Patents

Description

  The present invention relates to a vehicle network system.

  In recent years, as a communication system that controls a plurality of vehicle electrical devices mounted on a vehicle, a plurality of electronic control units that control each vehicle electrical device are connected by a common multiplex communication line, respectively, via the multiplex communication line. A vehicle network system is used in which multiplexed signals are exchanged and the operation of each vehicle electrical equipment is controlled based on the signals (see, for example, Patent Document 1).

  In such a vehicle network system, an electronic control unit is provided in an in-vehicle connector for connecting a wire harness constituting a multiplex communication line and each vehicle electrical equipment, and each vehicle-mounted connector has an ID identification function, thereby Signals are exchanged with a control device (ECU: Electronic Control Unit) (see, for example, Patent Document 2).

JP 2004-268630 A JP 2008-155906 A

  By the way, in the vehicle network system as described above, when constructing a network or adding a function, a plurality of types of in-vehicle connectors with IDs set in advance are prepared, or the setting ID of each in-vehicle connector is set to software or wireless. It had to be rewritten, and it took time and effort.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vehicle network system capable of easily constructing a network and adding functions.

In order to achieve the above-described object, the vehicle network system according to the present invention is characterized by the following (1) to (4).
(1) Various vehicle electrical equipment mounted on the vehicle;
A wire harness composed of a bundle of wires to be routed to the vehicle;
A master electronic control unit connected to the wire harness;
An in-vehicle connector that is provided for each of the vehicle electrical equipment and has a control function unit that is connected to the wire harness and communicates with the master electronic control unit and controls the vehicle electrical equipment;
The predetermined electric wire constituting the wire harness is an ID setting line,
The control function unit obtains a resistance value between a base end of the ID setting line and a connection position of the in-vehicle connector to the ID setting line, calculates the connection position from the resistance value, and A vehicle network system comprising an ID setting function for setting an ID corresponding to the connection position in the in-vehicle connector with reference to an ID assigned to each connection position of the in-vehicle connector.
(2) The vehicle network system according to (1), wherein the wire harness includes a resistance wire, and the resistance wire is the ID setting line.
(3) Various vehicle electrical equipment mounted on the vehicle;
A wire harness composed of a bundle of wires to be routed to the vehicle;
A master electronic control unit connected to the wire harness;
An in-vehicle connector that is provided for each of the vehicle electrical equipment and has a control function unit that is connected to the wire harness and communicates with the master electronic control unit and controls the vehicle electrical equipment;
The predetermined electric wire constituting the wire harness is an ID setting line,
The control function unit detects a voltage value at a connection position of the in-vehicle connector to the ID setting line in the ID setting line to which a predetermined voltage is applied, determines the connection position from the voltage value, and the wire harness A vehicle network system characterized by having an ID setting function for setting an ID corresponding to the connection position in the in-vehicle connector with reference to an ID assigned to each connection-scheduled position of the in-vehicle connector.
(4) The vehicle network system according to (3), wherein the wire harness includes a resistance wire, and the resistance wire is the ID setting line.

In the vehicle network system having the configuration (1), when the in-vehicle connector is connected to the wire harness, the control function unit having the ID setting function of the in-vehicle connector sets the resistance value between the base end of the ID setting line and the connection position. The connection position is determined from the obtained resistance value, and the ID assigned to the ID setting line is set in the in-vehicle connector based on the connection position. Therefore, it is possible to construct a network using a common in-vehicle connector having this ID setting function, and it is possible to reduce the cost by using in-vehicle connectors in comparison with the case of using in-vehicle connectors set to different IDs in advance. . Further, it is possible to eliminate the trouble of changing the ID of each in-vehicle connector by software or wireless. Thereby, construction of a vehicle network and addition of vehicle electrical equipment can be facilitated.
In the vehicle network system configured as described in (2) above, if a resistance line having a high electrical resistivity is used as the ID setting line, the resistance value changes greatly due to a change in the connection position. The connection position of the in-vehicle connector can be reliably determined from the resistance value between them.
In the vehicle network system having the configuration (3), when the in-vehicle connector is connected to the wire harness, the control function unit having the ID setting function of the in-vehicle connector causes the voltage value at the connection position on the ID setting line to which a predetermined voltage is applied. Is detected to determine the connection position, and the ID assigned to the ID setting line is set in the in-vehicle connector based on the connection position. Therefore, it is possible to construct a network using a common in-vehicle connector having this ID setting function, and it is possible to reduce the cost by using in-vehicle connectors in comparison with the case of using in-vehicle connectors set to different IDs in advance. . Further, it is possible to eliminate the trouble of changing the ID of each in-vehicle connector by software or wireless. Thereby, construction of a vehicle network and addition of vehicle electrical equipment can be facilitated.
In the vehicle network system configured as described in (4) above, by using a resistance wire having a high electrical resistivity as the ID setting line, the connection position of the in-vehicle connector can be reliably obtained by obtaining the voltage value at the connection position with a small amount of current with high accuracy. Can be determined.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle network system which can construct | assemble a network easily and can add a function can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a schematic configuration diagram showing a vehicle network system according to the present embodiment. 2A and 2B are diagrams illustrating an in-vehicle connector used in the vehicle network system according to the present embodiment, in which FIG. 2A is a partially broken perspective view of the in-vehicle connector, and FIG. 2B is FIG. 2A. FIG. 2 (c) is a plan view of the in-vehicle connector shown in FIG. 2 (a), and FIG. 2 (d) is the in-vehicle shown in FIG. 2 (a). It is AA sectional drawing of a connector. FIG. 3 is a schematic configuration diagram of a part of the vehicle network system according to the present embodiment. FIG. 4 is a schematic diagram of an ID setting line and an in-vehicle connector for explaining ID setting by an ID setting function provided in a control function unit of the in-vehicle connector. FIG. 5 is a schematic diagram of an ID setting line and an in-vehicle connector for explaining a vehicle network system according to another embodiment.

Hereinafter, an example of an embodiment of a vehicle network system according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a vehicle network system according to the present embodiment.

  As shown in FIG. 1, the vehicle network system 1 mainly includes a wire harness 11, a master ECU 12, various vehicle electrical equipment 13, an in-vehicle connector 14, and a connection member 15. The vehicle network system 1 performs multiplexed communication using the in-vehicle connector 14 as a slave by an in-vehicle communication system such as LIN (Local Interconnect Network) or CXPI (Clock Extension Peripheral Interface). In addition, in these LIN and CXPI, in order to distinguish the in-vehicle connector 14 as a slave, 16 types including a master (a total of 16 types including one type of master and 15 types of slave. One master and 15 slaves communicate) The maximum number of connections that can be connected to the line) can be set.

  The wire harness 11 is a bundle of electric wires based on three types of electric wires: a power line 23 as a trunk line, a communication line 25, and a GND (ground line) 27. The wire harness 11 is routed to the vehicle and constitutes a multiple communication line of the vehicle network system 1. Note that the wire harness 11 is not limited to the three types of the power supply line 23, the communication line 25, and the GND 27, and it is needless to say that the wire harness 11 may include other electric wires such as signal lines.

  Further, the wire harness 11 includes an ID setting line 29. The ID setting line 29 is a resistance wire having a large internal resistance, such as a nichrome wire, and the base end K is connected to the ground.

  Master ECU12 is an electronic control unit (ECU: Electronic Control Unit) which controls each vehicle electrical equipment 13 as a main control apparatus, for example, is comprised from the microcomputer. The master ECU 12 is connected to one end of a wire harness 11 that is a trunk line.

  The vehicle electrical equipment 13 is a variety of electrical equipment mounted on the vehicle, and is a main equipment that is commonly attached to the vehicle or an auxiliary equipment that is selectively retrofitted to the vehicle. Examples of main equipment include joint boxes, air conditioner units, engine control units, power window units, rear combination lamp units, and power seat units. Auxiliary equipment includes, for example, centralized door locks. -There are units and seat heater units. The vehicle electrical equipment 13 includes a connection connector 13a.

  2A and 2B are diagrams illustrating an in-vehicle connector used in the vehicle network system according to the present embodiment, in which FIG. 2A is a partially broken perspective view of the in-vehicle connector, and FIG. 2B is FIG. 2A. FIG. 2 (c) is a plan view of the in-vehicle connector shown in FIG. 2 (a), and FIG. 2 (d) is the in-vehicle shown in FIG. 2 (a). It is AA sectional drawing of a connector.

  As shown in FIG. 2, the in-vehicle connector 14 is a connector that connects the various vehicle electrical devices 13 to the wire harness 11 to construct the vehicle network system 1 by being connected to the wire harness 11. The in-vehicle connector 14 has an insulating resin case 32 constituted by an upper case 30 and a lower case 31, and a pressure contact portion 33 and a circuit board 34 are accommodated in the case 32. For example, the press contact portion 33 is configured by standing up a plurality of press contact blades 35, and is connected to a predetermined circuit of the circuit board 34. The circuit board 34 is provided with a board mounting connector 36, and the connection member 15 is connected to the board mounting connector 36.

  The in-vehicle connector 14 is provided with a control function unit 37 on a circuit board 34. The control function unit 37 includes a signal generation unit that communicates with the master ECU 12 via the communication line 25 and generates a control signal for controlling the operation of the vehicle electrical device 13. The control function unit 37 is an electronic control unit (ECU) that electronically controls the vehicle electrical equipment 13. For example, a microcomputer, a semiconductor fuse, a communication transceiver, and the like are mounted on a circuit board or a circuit body using a bus bar. It consists of

  The in-vehicle connector 14 sandwiches the power line 23, the communication line 25, and the GND 27 in the wire harness 11 between the upper case 30 and the lower case 31. It is press-connected. Similarly to the power supply line 23, the communication line 25, and the GND 27, the ID setting line 29 is also press-connected to the press-contact portion 33 by the upper case 30 and the lower case 31. The in-vehicle connector 14 sandwiching the power supply line 23, the communication line 25, the GND 27, and the ID setting line 29 in the wire harness 11 is fixed at an arbitrary position of the wire harness 11 by locking the upper case 30 and the lower case 31. The That is, the connection between the wire harness 11 and the vehicle electrical equipment 13 is simply completed simply by attaching the in-vehicle connector 14 to an arbitrary position of the basic harness.

  As shown in FIG. 1, the connection member 15 is a member that connects the in-vehicle connector 14 and the vehicle electrical equipment 13. The connection member 15 includes a connection line 41, a network side connector 42, and a device side connector 43. The network side connector 42 is a connector that is coupled and connected to the board mounted connector 36 of the in-vehicle connector 14, and is provided at one end of the connection line 41. The device-side connector 43 is a connector that is coupled and connected to the connection connector 13 a of the vehicle electrical device 13, and is provided at the other end of the connection line 41. The connection member 15 is connected to the wire harness 11 by connecting the network side connector 42 to the board mounting connector 36 of the in-vehicle connector 14 and connecting the device side connector 43 to the connection connector 13a of the vehicle electrical equipment 13. The vehicle-mounted connector 14 and the vehicle electrical equipment 13 are electrically connected, and the vehicle electrical equipment 13 can be controlled by the control function unit 37 of the vehicle-mounted connector 14.

FIG. 3 is a schematic configuration diagram of a part of the vehicle network system according to the present embodiment.
The in-vehicle connector 14 includes a built-in resistor Rc having a power supply Vcc connected to one end. The other end of the built-in resistor Rc is conductively connected to the ID setting line 29 of the wire harness 11 when the in-vehicle connector 14 is connected to the wire harness 11. The control function unit 37 of the in-vehicle connector 14 has a strobe circuit, and the power source Vcc applies a predetermined voltage for a short time at a predetermined timing by a strobe signal generated from the strobe circuit. The timing at which the predetermined voltage is applied is when the vehicle ignition is turned on, when the battery power supply is connected, or when the in-vehicle connector 14 is connected to the wire harness 11.

  The in-vehicle connector 14 is connected to a plurality of communication lines 25 of the common wire harness 11 for communication. Therefore, in the vehicle network system 1, it is necessary to set ID (Identification Data) for each in-vehicle connector 14. In the present embodiment, the control function unit 37 of the in-vehicle connector 14 has an ID setting function for setting an ID.

Next, an ID setting function provided in the control function unit 37 will be described.
FIG. 4 is a schematic diagram of an ID setting line and an in-vehicle connector for explaining ID setting by an ID setting function provided in a control function unit of the in-vehicle connector.

  When the in-vehicle connector 14 is connected to the wire harness 11, the portion on the ground side with respect to the connection position P in the ID setting line 29 and the built-in resistor Rc are connected in series, and the proximal end K connected to the ground in the ID setting line 29. A voltage divider circuit is formed by the resistor R and the built-in resistor Rc. In this state, when a predetermined voltage is applied from the power supply Vcc, the control function unit 37 detects the potential between the resistor R and the built-in resistor Rc, and the resistance between the K-P portions of the ID setting line 29 is detected. Find the value r. Since the ID setting line 29 has an electrical resistivity determined by the material, the cross-sectional area, etc., the resistance value r between K-P of the ID setting line 29 depends on the connection position P to the ID setting line 29. Change. Specifically, the resistance value r between K and P is smaller as it is closer to the base end K connected to the ground, and increases as the distance from the base end K increases. Therefore, the control function part 37 calculates | requires the connection position P based on the electrical resistivity of the ID setting line 29, and the resistance value r between K-P calculated | required at the time of voltage application.

  Here, the mounting position of the vehicle electrical equipment 13 on the vehicle is almost determined by the type of the vehicle. Therefore, the in-vehicle connector 14 is connected to a substantially fixed position with respect to the wire harness 11. As shown in FIG. 4, an ID is assigned to the ID setting line 29 provided in the wire harness 11 in advance with respect to the planned connection position Py of the in-vehicle connector 14, and the information is registered in the control function unit 37. Yes. In the ID setting line 29, IDs are assigned to the planned connection position Py, for example, “ID1, ID2, ID3...” In order from the base end K side. The master ECU 12 is attached to the planned position Py, the left tail lamp unit is attached to the planned connection position Py assigned ID4, the luggage lamp is attached to the planned connection position Py assigned ID6, and the right tail lamp is attached to the planned connection position Py assigned ID7. The In addition, the vehicle-mounted connector 14 which connects the vehicle electrical equipment 13 added as an option is connected to the connection planned position Py to which the vehicle-mounted connector 14 is not connected.

  And the control function part 37 of the vehicle-mounted connector 14 collates the connection scheduled position Py of the ID setting line 29 with the connection position P calculated | required from the resistance value r between K-P, and calculates | requires ID in the connection position P, The ID is set in the in-vehicle connector 14. Thereby, each vehicle-mounted connector 14 connected to the wire harness 11 is set with a different ID, and data communication by multiplex communication with the master ECU 12 becomes possible.

  As described above, according to the present embodiment, when the in-vehicle connector 14 is connected to the wire harness 11, the control function unit 37 having the ID setting function of the in-vehicle connector 14 is connected to the proximal end K of the ID setting line 29. A resistance value r between K and P between the base end K of the ID setting line 29 and the connection position P is obtained from a voltage dividing circuit formed as a resistor R between K and P between the position P and the vehicle. The connection position P of the connector 14 is determined. Then, the ID corresponding to the estimated connection position Py of the in-vehicle connector 14 assigned to the ID setting line 29 is set in the in-vehicle connector 14 with reference to the determined connection position P. Therefore, it is possible to construct a network using the common in-vehicle connector 14 having this ID setting function, and the cost due to the common use of the in-vehicle connector 14 compared to the case where in-vehicle connectors set to different IDs in advance are used. You can go down. Further, it is possible to eliminate the trouble of changing the ID of each in-vehicle connector by software or wireless. Thereby, construction of a network and addition of the vehicle electrical equipment 13 can be facilitated.

  In particular, when a resistance wire having a high electrical resistivity is used as the ID setting line 29, the resistance value r changes greatly due to the change in the connection position P. Therefore, the K− between the base end K of the ID setting line 29 and the connection position P. The connection position P of the in-vehicle connector 14 can be reliably determined from the resistance value r between P.

Next, an ID setting function of the control function unit 37 according to another embodiment will be described.
FIG. 5 is a schematic diagram of an ID setting line and an in-vehicle connector for explaining a vehicle network system according to another embodiment.

  As shown in FIG. 5, a power supply V is connected to the ID setting line 29, and for example, a predetermined voltage E of about 5 V can be applied. A predetermined voltage E is applied to the ID setting line 29 from the power source V for a short time at a predetermined timing. The timing at which the predetermined voltage E is applied is when the vehicle ignition is turned on, when the battery power supply is connected, or when the in-vehicle connector 14 is connected to the wire harness 11. In addition, the control function unit 37 of the in-vehicle connector 14 is provided with a voltage detection unit that detects a voltage at the connection position P.

  When a predetermined voltage E is applied from the power supply V to the ID setting line 29 in a state where the in-vehicle connector 14 is connected to the wire harness 11, the voltage of the ID setting line 29 is detected by the control function unit 37 of the in-vehicle connector 14. As described above, since the ID setting line 29 has an electrical resistivity determined by the material, the cross-sectional area, and the like, the voltage between K and P of the ID setting line 29 is connected to the ID setting line 29. It changes according to. Specifically, the voltage between K and P decreases as the distance from the proximal end K connected to the ground decreases, and increases as the distance from the proximal end K increases. Therefore, the control function unit 37 obtains the connection position P based on the voltage value e of the ID setting line 29 detected when a predetermined voltage is applied.

  And the control function part 37 of the vehicle-mounted connector 14 collates the connection scheduled position Py of the ID setting line 29 with the connection position P calculated | required from the voltage value e between K-P, and calculates | requires ID in the connection position P, The ID is set in the in-vehicle connector 14. Thereby, each vehicle-mounted connector 14 connected to the wire harness 11 is set with a different ID, and data communication by multiplex communication with the master ECU 12 becomes possible.

  According to the other embodiment, when the in-vehicle connector 14 is connected to the wire harness 11, the control function unit 37 having the ID setting function of the in-vehicle connector 14 connects the connection position P in the ID setting line 29 to which the predetermined voltage E is applied. The connection position P is determined by detecting the voltage value e at, and the ID corresponding to the planned connection position Py of the in-vehicle connector 14 assigned to the ID setting line 29 is referred to, and the ID corresponding to the connection position P is in-vehicle. Set to connector 14. Therefore, it is possible to construct a network using the common in-vehicle connector 14 having this ID setting function, and the cost due to the common use of the in-vehicle connector 14 compared to the case where in-vehicle connectors set to different IDs in advance are used. You can go down. Further, it is possible to eliminate the trouble of changing the ID of each in-vehicle connector by software or wireless. Thereby, construction of a network and addition of the vehicle electrical equipment 13 can be facilitated.

  In addition, since a resistance wire having a high electrical resistivity is used as the ID setting line 29, the connection position P of the in-vehicle connector 14 can be reliably determined by obtaining the voltage value e at the connection position P with high accuracy with a small current. it can.

  In addition, in the said embodiment and other embodiment, in order to obtain | require the connection position P smoothly, ID setting line 29 which consists of resistance wires was used, but ID setting of other electric wires of wire harnesses 11, such as GND27, is carried out, for example. In this case, a dedicated line for setting an ID is not necessary, and the number of wire harnesses 11 can be reduced. And when using the other electric wire of the wire harness 11 as an ID setting line, the control function part 37 of the vehicle-mounted connector 14 has the resistance value r of the internal resistance of the electric wire used as the ID setting line, or the voltage value e in the length direction of the electric wire. Therefore, the connection position P is obtained.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Here, the features of the embodiment of the vehicle network system according to the present invention described above are briefly summarized and listed in the following [1] to [4], respectively.
[1] Various vehicle electrical equipment (13) mounted on the vehicle;
A wire harness (11) consisting of a bundle of electric wires routed to the vehicle;
A master electronic control unit (12) connected to the wire harness (11);
A control function provided for each of the vehicle electrical equipment (13), connected to the wire harness (11) and communicating with the master electronic control unit (12) and controlling the vehicle electrical equipment (13). An in-vehicle connector (14) having a portion (37),
The predetermined electric wire constituting the wire harness (11) is an ID setting line (29),
The control function unit (37) has a resistance value between a base end (K) of the ID setting line (29) and a connection position (P) of the in-vehicle connector (14) to the ID setting line (29). (R) is obtained, the connection position (P) is determined from the resistance value (r), and the ID assigned to each connection position of the in-vehicle connector (14) with respect to the wire harness (11) is referred to. A vehicle network system comprising an ID setting function for setting an ID corresponding to the connection position (P) in the in-vehicle connector (14).
[2] The vehicle network system according to [1], wherein the wire harness (11) includes a resistance wire, and the resistance wire is the ID setting line (29).
[3] Various vehicle electrical equipment (13) mounted on the vehicle;
A wire harness (11) consisting of a bundle of electric wires routed to the vehicle;
A master electronic control unit (12) connected to the wire harness (11);
A control function provided for each of the vehicle electrical equipment (13), connected to the wire harness (11) and communicating with the master electronic control unit (12) and controlling the vehicle electrical equipment (13). An in-vehicle connector (14) having a portion (37),
The predetermined electric wire constituting the wire harness (11) is an ID setting line (29),
The control function unit (37) is a voltage at a connection position (P) of the in-vehicle connector (14) to the ID setting line (29) in the ID setting line (29) to which a predetermined voltage (E) is applied. A value (e) is detected, the connection position (P) is determined from the voltage value (e), and an ID assigned to each connection position of the in-vehicle connector (14) with respect to the wire harness (11) is referred to. The vehicle network system has an ID setting function for setting an ID corresponding to the connection position (P) in the in-vehicle connector (14).
[4] The vehicle network system according to [3], wherein the wire harness (11) includes a resistance wire, and the resistance wire is the ID setting line (29).

1: Vehicle network system 11: Wire harness 12: Master electronic control unit 13: Vehicle electrical equipment 14: In-vehicle connector 29: ID setting line 37: Control function part P: Connection position Py: Estimated connection position R: Resistor r: Resistance Value E: Predetermined voltage e: Voltage value

Claims (4)

Various vehicle electrical equipment mounted on the vehicle;
A wire harness composed of a bundle of wires to be routed to the vehicle;
A master electronic control unit connected to the wire harness;
An in-vehicle connector that is provided for each of the vehicle electrical equipment and has a control function unit that is connected to the wire harness and communicates with the master electronic control unit and controls the vehicle electrical equipment;
The predetermined electric wire constituting the wire harness is an ID setting line,
The control function unit obtains a resistance value between a base end of the ID setting line and a connection position of the in-vehicle connector to the ID setting line, calculates the connection position from the resistance value, and A vehicle network system comprising an ID setting function for setting an ID corresponding to the connection position in the in-vehicle connector with reference to an ID assigned to each connection position of the in-vehicle connector. The vehicle network system according to claim 1, wherein the wire harness includes a resistance wire, and the resistance wire is the ID setting line. Various vehicle electrical equipment mounted on the vehicle;
A wire harness composed of a bundle of wires to be routed to the vehicle;
A master electronic control unit connected to the wire harness;
An in-vehicle connector that is provided for each of the vehicle electrical equipment and has a control function unit that is connected to the wire harness and communicates with the master electronic control unit and controls the vehicle electrical equipment;
The predetermined electric wire constituting the wire harness is an ID setting line,
The control function unit detects a voltage value at a connection position of the in-vehicle connector to the ID setting line in the ID setting line to which a predetermined voltage is applied, determines the connection position from the voltage value, and the wire harness A vehicle network system characterized by having an ID setting function for setting an ID corresponding to the connection position in the in-vehicle connector with reference to an ID assigned to each connection-scheduled position of the in-vehicle connector. The vehicle network system according to claim 3, wherein the wire harness includes a resistance wire, and the resistance wire is the ID setting line.