Vehicular onboard control system

Abstract

The present invention makes it easy to realize a structure in which the types of electrical apparatuses connected to a wiring board are identified on the wiring board side, without the need for installing an ECU that notifies information for identifying the types of electrical apparatuses. An automotive control system (100) comprises a wiring board (1), a connector (6) that connects an electrical apparatus (90) to the wiring board (1), and a detection circuit (3) that is provided to the wiring board (1). The connector (6) has a first resistor part (7). The detection circuit (3) is electrically connected to the first resistor part (7) while the connector (6) is connected to the wiring board (1) and outputs a resistance value signal that corresponds to the resistance value of the first resistor part (7).

Description

In-vehicle control systems

[0001] The present disclosure relates to in-vehicle control systems.

[0002] Patent Document 1 discloses a vehicle power supply control system. This vehicle power supply control system includes a power supply control box. Either an electrical device of specification A or an electrical device of specification B is connected to this power supply control box via a wire harness. The power supply control box is equipped with a non-volatile memory and a power supply control unit. The non-volatile memory stores customization information corresponding to the specifications of both electrical devices. The power supply control unit references the customization information corresponding to the specifications of the connected electrical device and performs control according to those specifications.

[0003] In this technology, the power supply control unit needs to identify the specifications of the electrical equipment connected to the power supply control box. Patent Document 1 shows the following configuration as an example: An ECU is installed in the electrical equipment. When the electrical equipment is connected to the power supply control box, this ECU is also connected to the power supply control box and notifies the power supply control unit of information for identifying the specifications of the electrical equipment. This allows the power supply control unit to automatically identify the specifications of the electrical equipment when the electrical equipment is connected to the power supply control box.

[0004] [Correction based on Rule 91 19.02.2025] JP 2016-43872 A

[0005] However, when identifying the electrical equipment using the above-described method, an ECU is required to notify information for identifying the specifications of the electrical equipment.

[0006] The present disclosure aims to provide a technology that makes it easy to realize a configuration in which the type of electrical equipment connected to the wiring board is identified on the wiring board side without providing an ECU that notifies information for identifying the type of electrical equipment.

[0007] The in-vehicle control system of the present disclosure comprises a wiring board, a connector that connects an electrical device to the wiring board, and a detection circuit provided on the wiring board, wherein the connector has a first resistor portion, and the detection circuit is electrically connected to the first resistor portion when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of the first resistor portion.

[0008] According to the in-vehicle control system of the present disclosure, it is easy to realize a configuration in which the type of electrical equipment connected to the wiring board is identified on the wiring board side without providing an ECU that notifies information for identifying the type of electrical equipment.

[0009] FIG. 1 is an explanatory diagram conceptually illustrating the electrical configuration of an in-vehicle control system according to a first embodiment. FIG. 2 is a configuration diagram of an in-vehicle control system that more specifically embodies a detection circuit. FIG. 3 is an explanatory diagram illustrating the configurations of a control circuit, a detection circuit, and an intermediate circuit in more detail. FIG. 4 is an explanatory diagram illustrating a first example in which a connector is connected to a wiring board. FIG. 5 is an explanatory diagram illustrating a second example in which a connector is connected to a wiring board. FIG. 6 is a flowchart illustrating the flow of processing performed by a control circuit. FIG. 7 is an explanatory diagram illustrating the correspondence between resistance values ​​of first resistors, electrical devices, and ports. FIG. 8 is an explanatory diagram conceptually illustrating the electrical configuration of an in-vehicle control system according to a second embodiment. FIG. 9 is an explanatory diagram conceptually illustrating the electrical configuration of an in-vehicle control system according to a third embodiment. FIG. 10 is an explanatory diagram illustrating the correspondence between combinations of resistance value information of multiple first resistors and control patterns. FIG. 11 is an explanatory diagram conceptually illustrating the electrical configuration of an in-vehicle control system according to a fourth embodiment.

[0010] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0011] [1] An in-vehicle control system comprising: a wiring board; a connector for connecting an electrical device to the wiring board; and a detection circuit provided on the wiring board, wherein the connector has a first resistor portion, and the detection circuit is electrically connected to the first resistor portion when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of the first resistor portion.

[0012] The in-vehicle control system is configured such that the resistance value of the first resistor corresponds to the type of electrical device, and thus information for identifying the type of electrical device can be output from the detection circuit as a resistance value signal. That is, the in-vehicle control system enables the type of electrical device to be identified on the wiring board side based on the resistance value signal. Therefore, the in-vehicle control system can easily realize a configuration in which the type of electrical device connected to the wiring board side is identified on the wiring board side without providing an ECU that notifies information for identifying the type of electrical device.

[0013] [2] The in-vehicle control system described in [1], wherein the detection circuit has a second resistor connected in series to the first resistor when the connector is connected to the wiring board, and outputs a voltage obtained by dividing a predetermined voltage between the first resistor and the second resistor as the resistance value signal.

[0014] The above-described in-vehicle control system can easily simplify the configuration for outputting the resistance value signal in the detection circuit.

[0015] [3] The connector has a plurality of the first resistor portions, and the detection circuit is electrically connected to each of the first resistor portions when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of each of the first resistor portions. [1] or [2] The in-vehicle control system described in [1] or [2].

[0016] The connector can generate information for identifying the type of electrical device by combining the resistance value information of the plurality of first resistors, and therefore the in-vehicle control system can easily realize a configuration that allows many types of electrical devices to be identified on the wiring board side.

[0017] [4] The in-vehicle control system according to any one of [1] to [3], further comprising a control circuit installed on the wiring board, wherein the detection circuit outputs the resistance value signal in response to receiving an instruction signal output from the control circuit.

[0018] The control circuit outputs the instruction signal, thereby obtaining a resistance value signal corresponding to the resistance value of the first resistor section.

[0019] [5] The in-vehicle control system according to [4], wherein the control circuit performs control corresponding to the resistance value signal output from the detection circuit.

[0020] The control circuit can perform control corresponding to the resistance value signal output from the detection circuit. Therefore, in the above-mentioned in-vehicle control system, the resistance value of the first resistor portion is configured to correspond to the type of electrical equipment, so that the resistance value signal becomes a signal corresponding to the type of electrical equipment, and the control circuit can perform control according to the type of electrical equipment.

[0021] [6] The connector has a plurality of the first resistance parts, the detection circuit is electrically connected to each of the first resistance parts when the connector is connected to the wiring board, and outputs a resistance value signal according to the resistance value of each of the first resistance parts, and the control circuit performs control according to a combination of resistance value information identified from each of the resistance value signals. [4] or [5] An in-vehicle control system as described in [5] or [6].

[0022] The above-mentioned in-vehicle control system is configured so that the combination of resistance value information of the multiple first resistors corresponds to the type of electrical equipment, thereby allowing the control circuit to selectively perform control in accordance with many types of electrical equipment.

[0023] [7] The in-vehicle control system according to any one of [1] to [6], wherein both ends of the first resistor portion are electrically connected to the detection circuit when the connector is connected to the wiring board.

[0024] In the above-described in-vehicle control system, it is not necessary to electrically connect the first resistor portion to ground in the connector.

[0025] [8] An in-vehicle control system described in any one of [1] to [6], wherein when the connector is connected to the wiring board, one end of the first resistor portion is electrically connected to the detection circuit, and the other end of the first resistor portion is electrically connected to a ground provided in the connector.

[0026] In the above-described in-vehicle control system, since it is not necessary to connect the other end of the first resistor to the detection circuit, it is easy to simplify the connection structure between the connector and the detection circuit.

[0027] [Details of the embodiments of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0028] 1 discloses an in-vehicle control system 100. The in-vehicle control system 100 includes a wiring board 1, a control circuit 2, a detection circuit 3, an intermediate circuit 4, a board-side connector 5, and a connector 6. The control circuit 2, the detection circuit 3, the intermediate circuit 4, and the board-side connector 5 are provided on the wiring board 1. The wiring board 1, the control circuit 2, the detection circuit 3, the intermediate circuit 4, and the board-side connector 5 configure an ECU (Electronic Control Unit).

[0029] The wiring board 1 has a configuration in which a conductive wiring pattern is printed on an insulating substrate body made of resin or the like.

[0030] The control circuit 2 is a circuit that controls controlled objects such as loads mounted on the vehicle. The control circuit 2 includes, for example, a microcomputer. The control circuit 2 is configured as, for example, an MCU (Micro Controller Unit). The control circuit 2 includes a CPU, memory, etc. The control circuit 2 is mounted on the wiring board 1. The control circuit 2 has a plurality of input / output ports, and transmits and receives signals to and from external devices via these input / output ports.

[0031] The board-side connector 5 is mounted on the wiring board 1. The board-side connector 5 is connected to a connector 6.

[0032] The connector 6 is connected to an electric device 90. The electric device 90 may be, for example, a device to be controlled by the control circuit 2, such as a switch, a load, or an ECU. The load may be, for example, an LED, a display, a buzzer, a speaker, or a motor. The electric device 90 may be, for example, a device that outputs a signal to the control circuit 2. For example, the electric device 90 may be a sensor or a status monitoring device that outputs a signal according to the on / off state of a monitored object. In this embodiment, an example will be described in which the electric device 90 is a switch or an LED.

[0033] The connector 6 is connected to the wiring board 1 via the board-side connector 5. When the connector 6 is connected to the board-side connector 5, the connector 6 connects the electrical device 90 to the wiring board 1 via the board-side connector 5. As shown in FIG. 2 , the connector 6 has a first resistor 7. The first resistor 7 is set to a resistance value according to the type of electrical device 90 connected to the connector 6.

[0034] 2, the detection circuit 3 is provided between the control circuit 2 and the board-side connector 5 (see FIG. 1). In other words, the detection circuit 3 is provided between the control circuit 2 and a connector 6 connected to the board-side connector 5. The detection circuit 3 is electrically connected to the first resistor portion 7 when the connector 6 is connected to the wiring board 1. The detection circuit 3 is electrically connected to both ends of the first resistor portion 7.

[0035] The detection circuit 3 outputs a resistance value signal corresponding to the resistance value of the first resistor portion 7. The detection circuit 3 has a second resistor portion 10 connected in series to the first resistor portion 7 when the connector 6 is connected to the wiring board 1. The detection circuit 3 outputs a voltage obtained by dividing the power supply voltage Vcc between the first resistor portion 7 and the second resistor portion 10 as a resistance value signal. The detection circuit 3 outputs the resistance value signal in response to receiving an instruction signal output from the control circuit 2. In this embodiment, the instruction signal is a high-level signal.

[0036] The detection circuit 3 includes a detection switch 11, capacitors 12 and 14, and a resistor 13. In FIG. 2 , the detection switch 11 is an N-channel MOSFET, but may be a switch other than an N-channel MOSFET. A power supply voltage Vcc is applied to a high-potential terminal (specifically, the drain) of the detection switch 11. One end of a second resistor 10 is electrically connected to a low-potential terminal (specifically, the source) of the detection switch 11. One end of the first resistor 7, one end of the capacitor 12, and one end of the resistor 13 are electrically connected to the other end of the second resistor 10. In other words, one end of the resistor 13 is electrically connected to a path between the first resistor 7 and the second resistor 10. The other end of the resistor 13 is electrically connected to one end of the capacitor 14. The other ends of the first resistor 7, the capacitor 12, and the capacitor 14 are electrically connected to ground 95. The detection switch 11 is turned on when an on signal (specifically, a high-level signal) is input to its input section (specifically, its gate), and is turned off when an off signal is input to its input section. In response to the input of an instruction signal, the detection circuit 3 switches the detection switch 11 to the on state and outputs a resistance value signal via the resistor section 13. Note that the detection circuit 3 does not output a resistance value signal when the detection switch 11 is in the off state.

[0037] The detection circuit 3 includes a backflow prevention unit 15 and resistors 16, 17, 18, and 19. The backflow prevention unit 15 prevents current from flowing from the power supply to the control circuit 2. The backflow prevention unit 15 is provided between the input of the detection switch 11 and the control circuit 2. The backflow prevention unit 15 is an NPN-type bipolar transistor. One end of a resistor 16 and one end of a resistor 17 are electrically connected to the base of the bipolar transistor. The other end of the resistor 17 and the emitter of the bipolar transistor are electrically connected to ground 95. The collector of the bipolar transistor is electrically connected to one end of a resistor 18. The other end of the resistor 18 is electrically connected to one end of a resistor 19 and the input of the detection switch 11. The other end of the resistor 19 is electrically connected to the high-potential terminal of the detection switch 11. An instruction signal input to the detection circuit 3 is input to the base of the bipolar transistor. As a result, a current flows between the collector and emitter of the bipolar transistor, turning on the detection switch 11 .

[0038] 1, the intermediate circuit 4 is provided between the control circuit 2 and the board-side connector 5. That is, the intermediate circuit 4 is provided between the control circuit 2 and a connector 6 connected to the board-side connector 5. The intermediate circuit 4 outputs a signal to the connector 6 side in response to a signal input from the control circuit 2 side, and outputs a signal to the control circuit 2 side in response to a signal input from the connector 6 side. As shown in FIG. 3, the intermediate circuit 4 has a switch drive circuit 31 and an LED drive circuit 32.

[0039] The switch drive circuit 31 is configured by, for example, a known switch drive circuit, and is provided corresponding to the ports P1, P2, P3, and P4 of the control circuit 2. The control circuit 2 controls the switches corresponding to the ports P1, P2, P3, and P4 by outputting drive instruction signals from the ports P1, P2, P3, and P4.

[0040] The LED drive circuit 32 is configured by, for example, a known LED drive circuit, and is provided corresponding to the ports P5, P6, P7, and P8 of the control circuit 2. The control circuit 2 outputs drive instruction signals from the ports P5, P6, P7, and P8 to control the LEDs corresponding to the ports P5, P6, P7, and P8.

[0041] 4 shows a state in which the connector 6A is connected to the wiring board 1. The connector 6A is connected to switches 91A, 91B, 91C, and an LED 92A. The connector 6A connects the switches 91A, 91B, 91C, and the LED 92A to the wiring board 1. The connector 6A has a first resistor 7A. The resistance value of the first resistor 7A is set to a resistance value corresponding to the type of electrical device 90 (i.e., the switches 91A, 91B, 91C, and the LED 92A). The resistance value of the first resistor 7A is, for example, 2 kΩ. The first resistor 7A is electrically connected to the detection circuit 3.

[0042] 5 shows a state in which the connector 6B is connected to the wiring board 1. The LEDs 92A, 92B, 92C, and 92D are connected to the connector 6B. The connector 6B connects the LEDs 92A, 92B, 92C, and 92D to the wiring board 1. The connector 6B has a first resistor 7B. The resistance value of the first resistor 7B is set to a resistance value corresponding to the type of electrical device 90 (i.e., the LEDs 92A, 92B, 92C, and 92D). The resistance value of the first resistor 7B is, for example, 6 kΩ. The first resistor 7B is electrically connected to the detection circuit 3.

[0043] When a predetermined start condition is met, the control circuit 2 performs the process shown in Fig. 6. The start condition may be receipt of a start instruction from the external ECU 96 (see Fig. 1), receipt of a start instruction output from the connector 6 when the connector 6 is connected to the wiring board 1, or another condition.

[0044] 6 starts, the control circuit 2 first outputs an instruction signal from the instruction port P11 (see FIG. 3) in step S101. The instruction signal output from the instruction port P11 is input to the detection circuit 3. In response to the input of the instruction signal, the detection circuit 3 outputs a resistance value signal corresponding to the first resistor unit 7. The resistance value signal is input to the detection port P12 (see FIG. 3) of the control circuit 2. In step S102, the control circuit 2 acquires the resistance value signal.

[0045] After acquiring the resistance value signal, the control circuit 2 proceeds to step S103. In step S103, the control circuit 2 performs control corresponding to the resistance value signal output from the detection circuit 3. Specifically, the control circuit 2 determines the resistance value of the first resistor unit 7 from the resistance value signal. For example, the control circuit 2 determines R1 using the following equation (1): Vout = Vcc × R1 / (R1 + R2) Equation (1) Vout is the voltage of the resistance value signal. VCC may be pre-stored in the control circuit 2 or may be a detected value. R2 is pre-stored in the control circuit 2.

[0046] The control circuit 2 may use R1 as the resistance value of the first resistor section 7 as is, or may use a value corrected based on the resistance value of the resistor section 13, temperature, etc. as the resistance value of the first resistor section 7.

[0047] The control circuit 2 stores a plurality of control patterns in advance, and performs control using the control pattern corresponding to the identified resistance value of the first resistor section 7 .

[0048] For example, when the connector 6A shown in FIG. 4 is connected to the wiring board 1, the control circuit 2 determines the resistance value of the first resistor 7 (specifically, the first resistor 7A) to be 2 kΩ. The control circuit 2 then performs control using a control pattern corresponding to 2 kΩ. As shown in FIG. 7, the control pattern corresponding to 2 kΩ is included in the control patterns corresponding to 1 kΩ to 2.7 kΩ. The control pattern corresponding to 1 kΩ to 2.7 kΩ is a control pattern that controls the switches 91A, 91B, 91C, and LED 92A using signals output from ports P1, P2, P3, and P5.

[0049] 5 is connected to the wiring board 1, the control circuit 2 determines the resistance value of the first resistor 7 (specifically, the first resistor 7B) to be 6 kΩ. The control circuit 2 then performs control using a control pattern corresponding to 6 kΩ. As shown in FIG. 7, the control pattern corresponding to 6 kΩ is included in the control patterns corresponding to 4.7 kΩ to 6.8 kΩ. The control pattern corresponding to 4.7 kΩ to 6.8 kΩ is a control pattern that controls the LEDs 92A, 92B, 92C, and 92D using signals output from ports P5, P6, P7, and P8.

[0050] As described above, the in-vehicle control system 100 is configured so that the resistance value of the first resistor 7 corresponds to the type of the electric device 90, and thus information for identifying the type of the electric device 90 can be output from the detection circuit 3 as a resistance value signal. In other words, the in-vehicle control system 100 makes it possible to identify the type of the electric device 90 on the wiring board 1 side based on the resistance value signal. Therefore, the in-vehicle control system 100 can easily realize a configuration in which the type of the electric device 90 connected to the wiring board 1 is identified on the wiring board 1 side without providing an ECU that notifies information for identifying the type of the electric device 90.

[0051] In the first embodiment, the control circuit 2 performs control according to a control pattern corresponding to the resistance value without identifying the type of the electrical device 90, thereby performing control corresponding to the type of the electrical device 90 connected to the wiring board 1. Alternatively, the control circuit 2 may identify the type of the electrical device 90 based on the resistance value signal and perform control according to the identified type of the electrical device 90.

[0052] Since the in-vehicle control system 100 is configured to output the voltage obtained by dividing the power supply voltage Vcc between the first resistor section 7 and the second resistor section 10 as a resistance value signal, it is easy to simplify the configuration for outputting the resistance value signal in the detection circuit 3.

[0053] The control circuit 2 can obtain a resistance value signal corresponding to the resistance value of the first resistor section 7 by outputting the instruction signal.

[0054] The control circuit 2 can perform control corresponding to the resistance value signal output from the detection circuit 3. Therefore, in the in-vehicle control system 100, the resistance value of the first resistor 7 is configured to correspond to the type of the electrical device 90, so that the resistance value signal becomes a signal corresponding to the type of the electrical device 90, and the control circuit 2 can perform control according to the type of the electrical device 90.

[0055] In the in-vehicle control system 100 , it is not necessary to electrically connect the first resistor portion 7 to the ground 95 in the connector 6 .

[0056] Second Embodiment In the first embodiment, both ends of the first resistor 7 are connected to the detection circuit 3, but this is not limiting. In the second embodiment, a configuration in which only one end of the first resistor 7 is connected to the detection circuit 3 will be described. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0057] The in-vehicle control system 200 of the second embodiment differs from the in-vehicle control system 100 of the first embodiment in that the other end of the first resistor unit 7 is electrically connected to ground 95 within a connector 206 as shown in FIG. 8 , but is otherwise common. The ground 95 within the connector 206 is not particularly limited as long as it is connected to the vehicle body earth, and may be connected to the body earth via the electrical device 90 or directly to the body earth. One end of the first resistor unit 7 is electrically connected to the detection circuit 3. More specifically, one end of the first resistor unit 7 is electrically connected to the other end of the second resistor unit 10, one end of the capacitor 12, and one end of the resistor unit 13.

[0058] In the in-vehicle control system 200 of the second embodiment, there is no need to connect the other end of the first resistor 7 to the detection circuit 3, which makes it easy to simplify the connection structure between the connector 206 and the detection circuit 3.

[0059] Third Embodiment In a third embodiment, a configuration in which a connector has a plurality of first resistors will be described. Note that the same components as those in the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

[0060] As shown in Fig. 9, the in-vehicle control system 300 of the third embodiment includes a wiring board 1, a control circuit 2, a plurality of detection circuits 3, an intermediate circuit 4, and a connector 306. Although not shown in Fig. 9, the in-vehicle control system 300 of the third embodiment also includes the board-side connector 5 described in the first embodiment. The plurality of detection circuits 3 include detection circuits 3A and 3B.

[0061] The connector 306 has a plurality of first resistors 307 and 308. Each of the first resistors 307 and 308 is electrically connected to a corresponding detection circuit 3. Specifically, the first resistor 307 is electrically connected to the detection circuit 3A, and the first resistor 308 is electrically connected to the detection circuit 3B.

[0062] When the connector 306 is connected to the wiring board 1, the detection circuit 3 is electrically connected to each of the first resistor portions 307, 308, and outputs resistance value signals corresponding to the resistance values ​​of the first resistor portions 307, 308. Specifically, the detection circuit 3A outputs a resistance value signal corresponding to the resistance value of the first resistor portion 307. In response to an instruction signal being input from the control circuit 2, the detection circuit 3A outputs a resistance value signal corresponding to the resistance value of the first resistor portion 307. In response to an instruction signal being input from the control circuit 2, the detection circuit 3B outputs a resistance value signal corresponding to the resistance value of the first resistor portion 308. In response to an instruction signal being input from the control circuit 2, the detection circuit 3B outputs a resistance value signal corresponding to the resistance value of the first resistor portion 308.

[0063] The control circuit 2 performs control according to a combination of resistance value information determined from the resistance value signals from the detection circuits 3A and 3B. The resistance value information may be information indicating a resistance value, and may not be the resistance value itself but may be, for example, the voltage of the resistance value signal. For example, the control circuit 2 determines the resistance value of the first resistor unit 307 based on the resistance value signal from the detection circuit 3A, and determines the resistance value of the first resistor unit 308 based on the resistance value signal from the detection circuit 3B. The control circuit 2 then selects a control pattern according to the combination of the resistance value of the first resistor unit 307 and the resistance value of the first resistor unit 308, and performs control according to the selected control pattern.

[0064] For example, the control circuit 2 stores a table, as shown in FIG. 10 , that defines the correspondence between combinations of the resistance values ​​of the first resistor unit 307 and the resistance values ​​of the first resistor unit 308 and the control patterns. The control circuit 2 selects control pattern A when the resistance value of the first resistor unit 307 is 1 kΩ or more and 2.7 kΩ or less and the resistance value of the first resistor unit 308 is 1 kΩ or more and 2.7 kΩ or less. The control circuit 2 selects control pattern B when the resistance value of the first resistor unit 307 is 1 kΩ or more and 2.7 kΩ or less and the resistance value of the first resistor unit 308 is 4.7 kΩ or more and 6.8 kΩ or less. The control circuit 2 selects control pattern C when the resistance value of the first resistor unit 307 is 4.7 kΩ or more and 6.8 kΩ or less and the resistance value of the first resistor unit 308 is 1 kΩ or more and 2.7 kΩ or less. The control circuit 2 selects control pattern D when the resistance value of the first resistor unit 307 is 4.7 kΩ or more and 6.8 kΩ or less and the resistance value of the first resistor unit 308 is 4.7 kΩ or more and 6.8 kΩ or less.

[0065] As described above, the connector 306 can configure information for identifying the type of the electrical device 90 by combining the resistance values ​​of the multiple first resistors 307, 308. Therefore, the in-vehicle control system 300 can easily realize a configuration that allows many types of electrical devices 90 to be identified on the wiring board 1 side.

[0066] The in-vehicle control system 300 is configured so that the combination of resistance values ​​of the multiple first resistor sections 307, 308 corresponds to the type of electrical equipment 90, thereby allowing the control circuit 2 to selectively perform control in accordance with many types of electrical equipment 90.

[0067] Fourth Embodiment In a fourth embodiment, a configuration will be described in which an electrical device includes a device that outputs a signal to a control circuit 2. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0068] As shown in FIG. 11, the electrical device of the fourth embodiment includes a state monitor 491A, a sensor 491B, an LED 491C, and a buzzer 491D.

[0069] The status monitoring device 491A monitors the on / off state of the monitored object and outputs a signal corresponding to the on / off state to the control circuit 2. The monitored object is, for example, a right turn indicator. When the monitored object is in the on state, the switch 492A is in the on state, and when the monitored object is in the off state, the switch 492A is in the off state. Therefore, the status monitoring device 491A outputs a low-level signal when the monitored object is in the on state, and outputs a high-level signal when the monitored object is in the off state.

[0070] The sensor 491B is a sensor that detects whether or not another vehicle is present diagonally rearward of the vehicle to the right. When the sensor 491B detects another vehicle, it outputs a detection signal to the control circuit 2.

[0071] The LED 491C is controlled by the control circuit 2. The LED 491C is used for warning purposes.

[0072] The buzzer 491D is controlled by the control circuit 2. The buzzer 491D is used for warnings.

[0073] The in-vehicle control system 400 shown in FIG. 11 includes a control circuit 2 and an intermediate circuit 404. The intermediate circuit 404 has an input circuit 404A, an input circuit 404B, an LED drive circuit 404C, and a buzzer drive circuit 404D. A signal output from the status monitoring device 491A is input to the control circuit 2 via the input circuit 404A. A signal input from the sensor 491B is input to the control circuit 2 via the input circuit 404B. The control circuit 2 controls the LED 491C by providing a control signal to the LED drive circuit 404C. The control circuit 2 drives the buzzer 491D by providing a control signal to the buzzer drive circuit 404D.

[0074] The control circuit 2 selects a control pattern corresponding to these electrical devices and performs control according to the selected control pattern using the methods described in the first to third embodiments. For example, when the control circuit 2 receives a detection signal from the sensor 491B while the right turn indicator is on, it lights up the LED 491C and sounds the buzzer 491D to warn the driver.

[0075] Other Embodiments of the Present Disclosure The embodiments disclosed herein should be considered illustrative in all respects and not restrictive. (1) In the first and second embodiments, the first resistor is disposed closer to ground than the second resistor. However, the second resistor may be disposed closer to ground than the first resistor. (2) In the above embodiments, the control circuit switches the control pattern of an electrical device connected to a wiring board via a connector as a method for performing control corresponding to a resistance signal. However, other methods may be employed. For example, an in-vehicle control system may be configured such that the control circuit identifies a control pattern corresponding to a resistance signal, outputs a signal indicating the identified control pattern to an external ECU, and causes the external ECU to perform control according to the control pattern. In this case, the configuration in which "the control circuit identifies a control pattern corresponding to a resistance signal and outputs a signal indicating the identified control pattern to the external ECU" corresponds to the configuration in which "the control circuit performs control corresponding to a resistance signal."

[0076] DESCRIPTION OF SYMBOLS 1...wiring board 2...control circuit 3...detection circuit 3A...detection circuit 3B...detection circuit 4...intermediate circuit 5...substrate side connector 6...connector 6A...connector 6B...connector 7...first resistor portion 7A...first resistor portion 7B...first resistor portion 10...second resistor portion 11...detection switch 12...capacitor 13...resistance portion 14...capacitor 15...backflow prevention portion 16...resistance portion 17...resistance portion 18...resistance portion 19...resistance portion 31...switch drive circuit 32...LED drive circuit 90...electrical equipment 91A...switch 91B...switch 91C...switch 92A...LED 92B...LED 92C...LED 92D...LED 95...ground 96...external ECU 100...vehicle control system 200...vehicle control system 206...connector 300...In-vehicle control system 306...Connector 307...First resistor unit 308...First resistor unit 400...In-vehicle control system 404...Intermediate circuit 404A...Input circuit 404B...Input circuit 404C...LED drive circuit 404D...Buzzer drive circuit 491A...Status monitoring device 491B...Sensor 491C...LED 491D...Buzzer 492A...Switch P1...Port P2...Port P3...Port P4...Port P5...Port P6...Port P7...Port P8...Port P11...Instruction port P12...Detection port

Claims

1. An in-vehicle control system comprising: a wiring board; a connector for connecting an electrical device to the wiring board; and a detection circuit provided on the wiring board, wherein the connector has a first resistance portion, and the detection circuit is electrically connected to the first resistance portion when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of the first resistance portion.

2. The in-vehicle control system according to claim 1, wherein the detection circuit has a second resistor section connected in series to the first resistor section when the connector is connected to the wiring board, and outputs a voltage obtained by dividing a predetermined voltage between the first resistor section and the second resistor section as the resistance value signal.

3. The in-vehicle control system according to claim 1 or 2, wherein the connector has a plurality of the first resistor parts, and the detection circuit is electrically connected to each of the first resistor parts when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of each of the first resistor parts.

4. The in-vehicle control system according to claim 1 or 2, further comprising a control circuit mounted on the wiring board, wherein the detection circuit outputs the resistance value signal in response to an instruction signal output from the control circuit.

5. The vehicle-mounted control system according to claim 4, wherein the control circuit performs control corresponding to the resistance value signal output from the detection circuit.

6. The in-vehicle control system according to claim 4, wherein the connector has a plurality of the first resistance parts, the detection circuit is electrically connected to each of the first resistance parts when the connector is connected to the wiring board, and outputs a resistance value signal corresponding to the resistance value of each of the first resistance parts, and the control circuit performs control corresponding to a combination of resistance value information identified from each of the resistance value signals.

7. The in-vehicle control system according to claim 1 or 2, wherein both ends of the first resistor portion are electrically connected to the detection circuit when the connector is connected to the wiring board.

8. An in-vehicle control system as described in claim 1 or claim 2, wherein one end of the first resistor portion is electrically connected to the detection circuit and the other end of the first resistor portion is electrically connected to a ground provided on the connector when the connector is connected to the wiring board.

Images