Control device, control unit, diagnostic system and diagnostic procedure

Abstract

According to the present invention, a control device, a control unit, a diagnostic system, and a diagnostic method are achieved that can suitably save the space in which devices can be installed in a saddle-type vehicle. In the control device, the control unit, the diagnostic system, and the diagnostic method according to the present invention, the control device comprises a control part that can control the operation of a device, a CAN diagnostic mode, and an output mode in which the device is self-diagnosed, and a connector part, the connector part including a first CAN pin and a second CAN pin, the first CAN pin and the second CAN pin being connected to a comparator, and a detection circuit being connected to one of a first electrical line and a second electrical line.which detects the potential of a CAN pin connected to the one electrical line, wherein the control part determines whether the output mode can be executed based on the detection result of the detection circuit, and wherein a diode is provided in the control device which blocks the current flowing from the one CAN pin to the comparator and the detection circuit.

Description

[Technical field]

[0001] This disclosure relates to a control device, a control unit, a diagnostic system and a diagnostic method that can suitably save the space in which devices can be installed in a saddle-type vehicle. [State of the art]

[0002] Conventionally, CAN (Controller Area Network) communication has been widely used as a communication method for a saddle-type vehicle such as a motorcycle, etc., as disclosed in Patent Document 1, for example. CAN communication, which is used for various purposes, is also used for diagnosing a device installed in a saddle-type vehicle (diagnosis in which, for example, the presence of an abnormality occurring at any location on the device and the condition, etc., at a location where the abnormality occurs are detected). When diagnosing the device using CAN communication, a control device of this device is connected to a diagnostic device called a "test device," and CAN communication is performed between this control device and the diagnostic device.Of the several pins of a connector part of the control device, which is a section for attaching a cable, two pins are used for CAN communication to send and receive signals. [Prior art document][Patent document]

[0003] [Patent document 1] WO 2016 / 185514 A1 [Summary of the invention][Problem to be solved by the invention]

[0004] Incidentally, in addition to the CAN diagnostic mode, in which a device is diagnosed through CAN communication with a diagnostic device, there are also other diagnostic modes. For example, there is an output mode (so-called flashing mode) in which the device performs self-diagnosis independently of CAN communication with a diagnostic device and outputs information indicating the diagnostic result to a notification device such as a lamp, etc. Traditionally, this output mode is triggered by grounding an output mode pin provided on a connector part of the control device for the device.

[0005] In order to install the two functions of CAN diagnostic mode and output mode, thus making each mode selectable and executable, the current technology requires the provision of an output mode pin on the connector portion of the control device for this device, in addition to the two pins for CAN communication. This increases the number of pins on the connector portion of the control device, which may result in the space used for installing the control device being larger than the space for installing devices on a saddle-type vehicle.

[0006] According to the present invention, which has been made in view of the above-mentioned object, a control device, a control unit, a diagnostic system and a diagnostic method are achieved, with which the space in which devices can be installed can be suitably saved in a saddle-type vehicle. [Means of solving the problem]

[0007] The control device according to the present invention is a control device for a device installed in a saddle-type vehicle, comprising a control part capable of controlling the operation of the device, a CAN diagnostic mode in which the device is diagnosed through CAN communication with a diagnostic device, and an output mode in which the device is self-diagnosed independently of the CAN communication and information indicating the diagnosis result is output to a notification device, and a connector part for attaching a cable, the connector part including a plurality of pins connected to the cable, wherein in the plurality of pins, a first CAN pin, which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and a second CAN pin, which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals,are included, wherein the first CAN pin is connected to a first terminal of a comparator via a first electrical line, and the second CAN pin is connected to a second terminal of the comparator via a second electrical line, wherein a detection circuit is connected to one of the first electrical line and the second electrical line, which detects the potential of a CAN pin connected to the one electrical line, wherein the control part determines whether the output mode can be executed based on the detection result of the detection circuit, and wherein a diode is provided in the control device which blocks the current flowing from the one CAN pin to the comparator and the detection circuit.

[0008] The control unit according to the present invention comprises the above-described control device and apparatus, wherein the apparatus is a control mechanism including components for controlling a braking force generated on the caliper-type vehicle.

[0009] The diagnostic system according to the present invention is a diagnostic system for diagnosing a device installed in a saddle-type vehicle, comprising a control device and a grounding mechanism, wherein the control device comprises a control part capable of controlling the operation of the device, a CAN diagnostic mode in which the device is diagnosed through CAN communication with a diagnostic device, and an output mode in which the device is self-diagnosed independently of the CAN communication and information indicating the diagnosis result is output to a notification device, and a connector part for attaching a cable, wherein the connector part includes a plurality of pins that are connected to the cable, wherein in the plurality of pins, a first CAN pin, which is a high-voltage side CAN pin for transmitting and receiving signals of the CAN communication, and a second CAN pin,which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals, wherein the first CAN pin is connected to a first terminal of a comparator via a first electrical line, and the second CAN pin is connected to a second terminal of the comparator via a second electrical line. A detection circuit is connected to one of the first electrical line and the second electrical line, which detects the potential of a CAN pin connected to the one electrical line. The control part determines whether the output mode can be executed based on the detection result of the detection circuit. A diode is provided in the control device to block the current flowing from the one CAN pin to the comparator and the detection circuit, and the grounding mechanism grounds the one CAN pin.

[0010] The diagnostic method according to the present invention is a diagnostic method for diagnosing a device installed in a saddle-type vehicle by a control device, wherein the control device comprises a control part capable of controlling the operation of the device, a CAN diagnostic mode in which the device is diagnosed through CAN communication with a diagnostic device, and an output mode in which the device is self-diagnosed independently of the CAN communication and information indicating the diagnosis result is output to a notification device, and a connector part for attaching a cable, wherein the connector part includes a plurality of pins to be connected to the cable, wherein in the plurality of pins, a first CAN pin, which is a high-voltage side CAN pin for transmitting and receiving signals of the CAN communication, and a second CAN pin,which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals, wherein the first CAN pin is connected to a first terminal of a comparator via a first electrical line, and the second CAN pin is connected to a second terminal of the comparator via a second electrical line. A detection circuit is connected to one of the first electrical line and the second electrical line, which detects the potential of a CAN pin connected to the one electrical line. The control part determines whether the output mode can be executed based on the detection result of the detection circuit. A diode is provided in the control device to block the current flowing from the one CAN pin to the comparator and the detection circuit. [Advantages of the invention]

[0011] In the control device, the control unit, the diagnostic system, and the diagnostic method according to the present invention, the control device for a device installed in a saddle-type vehicle comprises a control part capable of controlling the operation of the device, a CAN diagnostic mode in which the device is diagnosed through CAN communication with a diagnostic device, and an output mode in which the device is self-diagnosed independently of the CAN communication and information indicating the diagnosis result is output to a notification device, and a connector part for attaching a cable, the connector part including a plurality of pins to be connected to the cable, in which, in the plurality of pins, a first CAN pin, which is a high-voltage side CAN pin for transmitting and receiving signals of the CAN communication, and a second CAN pin,which is a low-voltage-side CAN pin for transmitting and receiving CAN communication signals, wherein the first CAN pin is connected to a first terminal of a comparator via a first electrical line, and the second CAN pin is connected to a second terminal of the comparator via a second electrical line. A detection circuit is connected to one of the first electrical line and the second electrical line, which detects the potential of a CAN pin connected to the one electrical line. The control part determines, based on the detection result of the detection circuit, whether the output mode can be executed. This allows the execution of the output mode to be triggered, for example, by grounding a CAN pin. Therefore, the CAN diagnostic mode and output mode can be made selectable and executable.without providing a pin for the output mode in addition to the two pins for CAN communication. Furthermore, in the control device, control unit, diagnostic system, and diagnostic method according to the present invention, a diode is provided in the control device to block the current flowing from a CAN pin to the comparator and detection circuit. This can prevent the current from flowing to the control device from another device that shares the electrical lines connected to CAN pins with the control device, thus suppressing fluctuations in the potential detected at any point and thereby preventing erroneous operation of the device. Consequently, in a saddle-type vehicle, the space in which devices can be installed can be suitably saved. [Brief description of the drawings] [ Fig. 1] is a schematic view illustrating the outline structure of a saddle-type vehicle according to an embodiment of the present invention. [ Fig. 2] is a schematic view illustrating the outline structure of a brake system according to the embodiment of the present invention. [ Fig. 3] is a perspective view illustrating a fluid pressure control unit according to the embodiment of the present invention. [ Fig. 4] is a perspective view illustrating a control device of the fluid pressure control unit according to the embodiment of the present invention. [ Fig. 5] is a schematic view illustrating the circuit structure of a circuit board of a control device of a fluid pressure control unit according to a reference example. [ Fig. 6] is a view illustrating an example of the waveform of the potential of a first CAN pin and a second CAN pin according to the reference example in the case where CAN communication is performed. [ Fig. 7] is a view illustrating an example of the potential waveform of the first CAN pin and the second CAN pin according to the reference example in the case where grounding is performed by a grounding mechanism. [ Fig. 8] is a schematic view illustrating an example of the circuit structure of a circuit board of the control device of the liquid pressure control unit according to the embodiment of the present invention. [ Fig. 9] is a schematic view illustrating the state of the example according to Fig. 8 in CAN diagnostic mode. [ Fig. 10] is a view illustrating an example of the potential waveform of the first CAN pin and the second CAN pin according to the embodiment of the present invention in the case where CAN communication is performed. [ Fig. 11] is a schematic view illustrating another example of the circuit structure of the circuit board of the control device of the liquid pressure control unit according to the embodiment of the present invention. [ Fig. 12] is a schematic view illustrating the state of the example according to Fig. 11 in CAN diagnostic mode. [Embodiment of the invention]

[0012] In the following, the control device, the control unit, the diagnostic system and the diagnostic method according to the present invention are explained with reference to the drawings.

[0013] Although the control device for a two-wheeled motorcycle (specifically, a saddle-type vehicle 100 mentioned below in Fig. 1). However, vehicles to which the control device according to the present invention is applied may also be saddle-type vehicles other than two-wheeled motorcycles. By "saddle-type vehicles" we mean vehicles on which a rider sits astride. Included in "saddle-type vehicles" are, for example, motorcycles (two-wheeled motor vehicles, three-wheeled motor vehicles), bicycles, buggies, etc. Included in "motorcycles" are, for example, vehicles that use an engine as a drive source, vehicles that use an electric motor as a drive source, etc. Included in "motorcycles" are, for example, motorcycles, scooters, electric scooters, etc. Included in "bicycles" are vehicles that can be propelled along the road by the foot force of a rider exerted on pedals. Included in "bicycles" are ordinary bicycles, electrically assisted bicycles, electric bicycles, etc.

[0014] In addition, although the control device that controls the operation of a fluid pressure control mechanism will be explained below, the control device according to the present invention can also perform operation control and diagnosis of a device other than a fluid pressure control mechanism (e.g., an engine or suspension, etc.). That is, the control device according to the present invention can also be an engine control unit or suspension control unit, etc.

[0015] In addition, although the case where a single front wheel brake mechanism and a single rear wheel brake mechanism are provided will be explained below, it is also possible to provide a plurality of front wheel brake mechanisms and / or a plurality of rear wheel brake mechanisms, or to provide no front wheel brake mechanism or no rear wheel brake mechanism. In addition, although the case where a main flow passage, a sub-flow passage, and a supply passage are provided in the flow passage of the single brake mechanism will be explained below, the supply passage may also be omitted from the flow passage of the single brake mechanism. In addition, a first valve (USV) 35 and a second valve (HSV) 36, which will be mentioned later, may also be omitted from the flow passage of the single brake mechanism.

[0016] In addition, although the case will be explained below in which a control unit which brakes the wheels by means of the brake fluid (specifically, a fluid pressure control unit 5 mentioned below in Fig. 1). However, a control unit that brakes the wheels using an electrical mechanism (so-called brake-by-wire) can also be used as a control unit for controlling the braking force generated on the caliper-type vehicle.

[0017] Furthermore, the configurations, operations, etc. explained below are examples. The control device, control unit, diagnostic system, and diagnostic method according to the present invention are not limited to those having those configurations, operations, etc.

[0018] In the following, identical or similar explanations are simplified or omitted as appropriate. In the respective figures, identical or similar components or sections are either not provided with reference symbols, or they are provided with the same reference symbols. Furthermore, structural details are simplified or omitted as appropriate. <Aufbau der Flüssigkeitsdruck-Steuereinheit gemäß der vorliegenden Ausführungsform>

[0019] With reference to Fig. 1 to Fig. 4, the structure of a fluid pressure control unit 5 according to the embodiment of the present invention is explained.

[0020] The fluid pressure control unit 5 is used to control the braking force for braking the wheels of a caliper-type vehicle 100. In the present embodiment, the fluid pressure control unit 5 is provided in a braking system 10 of the caliper-type vehicle 100.

[0021] First, with reference to Fig. 1 and Fig. 2 the overall structure of the brake system 10 according to the embodiment of the present invention is explained.

[0022] Fig. 1 is a schematic view illustrating the outlined structure of the saddle-type vehicle 100 in which the brake system 10 with the fluid pressure control unit 5 is installed. The saddle-type vehicle 100 is a two-wheeled motorcycle, which is one example of the saddle-type vehicle according to the present invention. Fig. 2 is a schematic view illustrating the outlined structure of the braking system 10.

[0023] As in Fig. 1 and Fig. As illustrated in Fig. 2, the brake system 10 is installed in the saddle-type vehicle 100. The saddle-type vehicle 100 includes a frame 1, a handlebar 2 pivotally supported on the frame 1, a front wheel 3 pivotally supported on the frame 1 together with the handlebar 2, and a rear wheel 4 rotatably supported on the frame 1. The saddle-type vehicle 100 includes, for example, a prime mover (not shown) and is driven by the motive power output from this prime mover. The saddle-type vehicle 100 may also be driven by the motive power output from a motor.

[0024] Furthermore, a notification device 9 for notifying various information is provided on the saddle-type vehicle 100. As mentioned below, the notification device 9 is used in an output mode by a control device 52 of the fluid pressure control unit 5. For example, a display device such as a lamp, etc., or a sound output device, etc., is used as the notification device 9.

[0025] The braking system 10 includes a first brake actuating part 11, a front-wheel braking mechanism 12 that brakes the front wheel 3 at least in cooperation with the first brake actuating part 11, a second brake actuating part 13, and a rear-wheel braking mechanism 14 that brakes the rear wheel 4 at least in cooperation with the second brake actuating part 13. The braking system 10 also includes a fluid pressure control unit 5 that houses part of the front-wheel braking mechanism 12 and part of the rear-wheel braking mechanism 14. The fluid pressure control unit 5 is a unit that functions to control the braking force exerted by the front-wheel braking mechanism 12 on the front wheel 3 and the braking force exerted by the rear-wheel braking mechanism 14 on the rear wheel 4.

[0026] The first brake operating part 11, provided on the handlebar 2, is operated by a rider manually. The first brake operating part 11 is, for example, a brake lever. The second brake operating part 13, provided on the lower part of the frame 1, is operated by a rider by foot. The second brake operating part 13 is, for example, a brake pedal.

[0027] The front wheel brake mechanism 12 and the rear wheel brake mechanism 14 each include a master cylinder 21 in which a piston (not shown) is housed, a reservoir 22 attached to the master cylinder 21, a brake caliper 23 held on the frame 1 and having a brake pad (not shown), a wheel cylinder 24 provided on the brake caliper 23, a main flow passage 25 for flowing the brake fluid in the master cylinder 21 to the wheel cylinder 24, a sub-flow passage 26 for releasing the brake fluid in the wheel cylinder 24, and a supply passage 27 for supplying the brake fluid in the master cylinder 21 to the sub-flow passage 26.

[0028] A charging valve (EV) 31 is provided in the main flow channel 25. The bypass flow channel 26 provides a bypass between the side of the main flow channel 25 facing the wheel cylinder 24 with respect to the charging valve 31 and the side of the main flow channel 25 facing the master cylinder 21 with respect to the charging valve 31. A release valve (AV) 32, an accumulator 33, and a pump 34 are provided in the bypass flow channel 26 in this order from upstream. A first valve (USV) 35 is provided between the end of the main flow channel 25 facing the master cylinder 21 and a point on the main flow channel 25 to which the downstream end of the bypass flow channel 26 is connected. The supply channel 27 connects the master cylinder 21 to the suction side of the pump 34 of the bypass flow channel 26. A second valve (HSV) 36 is provided in the supply channel 27.

[0029] The charging valve 31, for example, is a solenoid valve that opens when de-energized and closes when energized. The release valve 32, for example, is a solenoid valve that closes when de-energized and opens when energized. The first valve 35, for example, is a solenoid valve that opens when de-energized and closes when energized. The second valve 36, for example, is a solenoid valve that closes when de-energized and opens when energized.

[0030] The charge valve 31, the release valve 32, the accumulator 33, the pump 34, the first valve 35, and the second valve 36 correspond to components for controlling the brake fluid pressure generated on the caliper-type vehicle 100 and are included in the fluid pressure control unit 5. Furthermore, the operation of these components is controlled by a control device 52 of the fluid pressure control unit 5. This controls the braking force applied by the front-wheel brake mechanism 12 to the front wheel 3 and the braking force applied by the rear-wheel brake mechanism 14 to the rear wheel 4. The control device 52 controls the operation of the above-described components depending, for example, on the driving state of the caliper-type vehicle 100.

[0031] For example, in the normal state, that is, in a state where ABS operation or automatic braking operation, etc., mentioned later, are not performed, the control device 52 opens the charging valve 31, closes the releasing valve 32, opens the first valve 35, and closes the second valve 36. In this state, when the first brake operating part 11 is operated, in the front wheel brake mechanism 12, a piston (not shown) of the master cylinder 21 is pushed in, the fluid pressure of the brake fluid in the wheel cylinder 24 is built up, a brake pad (not shown) of the caliper 23 is pressed against a rotor 3a of the front wheel 3, and the braking force is applied to the front wheel 3.Further, when the second brake operating member 13 is operated, in the rear wheel brake mechanism 14, a piston (not shown) of the master cylinder 21 is pushed in, the fluid pressure of the brake fluid in the wheel cylinder 24 is built up, a brake pad (not shown) of the brake caliper 23 is pressed against a rotor 4a of the rear wheel 4, and the braking force is applied to the rear wheel 4.

[0032] For example, ABS operation is an operation performed when a wheel (specifically, the front wheel 3 or the rear wheel 4) is locked or likely to lock, to reduce the braking force applied to that wheel, regardless of the driver's operation of a brake operating part (specifically, the first brake operating part 11 or the second brake operating part 13). For example, in a state where ABS operation is performed, the control device 52 first closes the charge valve 31, opens the release valve 32, opens the first valve 35, and closes the second valve 36. In this state, by driving the pump 34 by the control device 52, the fluid pressure of the brake fluid in the wheel cylinder 24 is reduced, and the braking force applied to the wheel is reduced.By subsequently closing both the charging valve 31 and the release valve 32 from the above-described state by the control device 52, the fluid pressure of the brake fluid in the wheel cylinder 24 is maintained and the braking force applied to the wheel is maintained. By subsequently opening the charging valve 31 and closing the release valve 32 by the control device 52, the fluid pressure of the brake fluid in the wheel cylinder 24 is built up and the braking force applied to the wheel is increased.

[0033] For example, the automatic braking operation is an operation performed when it is necessary to stabilize the posture of the saddle-type vehicle 100 during turning, etc., of the saddle-type vehicle 100, so as to generate the braking force applied to a wheel (specifically, the front wheel 3 or the rear wheel 4) regardless of the driver's operation of a brake operating part (specifically, the first brake operating part 11 or the second brake operating part 13). For example, in a state where the automatic braking operation is performed, the control device 52 opens the charge valve 31, closes the release valve 32, closes the first valve 35, and opens the second valve 36. In this state, by driving the pump 34 by the control device 52, the fluid pressure of the brake fluid in the wheel cylinder 24 is built up, and a braking force for braking the wheel is generated.

[0034] With reference to Fig. 3 and Fig. 4, a more detailed structure of the fluid pressure control unit 5 according to the embodiment of the present invention is explained.

[0035] Fig. 3 is a perspective view illustrating the fluid pressure control unit 5. Fig. 4 is a perspective view illustrating the control device 52 of the fluid pressure control unit 5. In Fig. For ease of understanding, the control device 52 is illustrated in Fig. 4 in such a way that it is visible through a housing 63.

[0036] As in Fig. 3 and Fig. 4, the fluid pressure control unit 5 includes a fluid pressure control mechanism 51 including a base body 51a and components incorporated into this base body 51a for controlling the brake fluid pressure generated on the caliper-type vehicle 100, and a control device 52 for controlling the operation of the fluid pressure control mechanism 51. The fluid pressure control mechanism 51 corresponds to an example of an apparatus according to the present invention.

[0037] The main body 51a has, for example, an approximately cuboid shape and is made of a metallic material. Specifically, the main flow passage 25, the sub-flow passage 26, and the supply passage 27 are formed inside the main body 51a of the fluid pressure control mechanism 51. The charge valve 31, the release valve 32, the accumulator 33, the pump 34, the first valve 35, and the second valve 36 are installed as components for controlling the brake fluid pressure generated on the caliper-type vehicle 100. A plurality of orifices 61 are formed on the outer surface of the main body 51a, which are connected to each flow passage. A brake fluid line is attached to each orifice 61, which is connected to the master cylinder 21 or the wheel cylinder 24.

[0038] The base body 51a can be formed from a single component or can also be formed from multiple components. Furthermore, if the base body 51a is formed from multiple components, the individual components can also be provided separately in different components.

[0039] The control unit (ECU) 52 includes a control part 52a for controlling the operation of the fluid pressure control mechanism 51 and a connector part 52b for attaching a cable. As mentioned below, the control part 52a can support a CAN diagnostic mode in which the fluid pressure control mechanism 51 can be tested by CAN communication with a diagnostic device referred to as a "tester" (cf. the diagnostic device 400 mentioned below according to Fig. 9) is diagnosed, and execute an output mode in which the fluid pressure control mechanism 51 is self-diagnosed independently of CAN communication with a diagnostic device, and information indicating the diagnosis result is output to the notification device 9. In the diagnostic mode (i.e., CAN diagnostic mode or output mode) of a device such as the fluid pressure control mechanism 51, etc., for example, the presence of an abnormality occurring at any location of the device and the condition at a location where the abnormality occurs, etc., are diagnosed. For example, the CAN diagnostic mode is executed in a factory, etc., upon inspection of the saddle-type vehicle 100 to be delivered. On the other hand, the output mode is executed upon inspection of the saddle-type vehicle 100 after delivery.

[0040] A part or the entirety of the control part 52a is composed of, for example, a microcomputer, a microprocessor unit, etc., and is installed on a circuit board 62. Furthermore, a part or the entirety of the control part 52a may be composed of, for example, an updatable item such as firmware, etc., and may also be a program module, etc., executed by an instruction from a CPU, etc.

[0041] Specifically, the control part 52a can control the braking force applied by the front wheel brake mechanism 12 to the front wheel 3 and the braking force applied by the rear wheel brake mechanism 14 to the rear wheel 4 by controlling the operation of the components installed in the main body 51a of the fluid pressure control mechanism 51. For example, depending on the driving state of the caliper-type vehicle 100, the control part 52a causes the above-described components to perform respective operations such as ABS operation or automatic braking operation, etc., in the above-mentioned manner.

[0042] The circuit board 62 for installing the control part 52a is housed in a housing 63, which is held on the main body 51a of the fluid pressure control mechanism 51. The housing 63 has, for example, a hollow, approximately square tube shape with an opening on one end and is formed of a resin. The housing 63 is held on the main body 51a in a state in which the opening of this housing 63 is closed by the main body 51a. For example, the housing 63 can be held directly on the main body 51a or can be held indirectly via another component.

[0043] Specifically, the connector part 52b is a portion for attaching a cable that connects to an external device, which is a device outside the control device 52. The connector part 52b includes a plurality of pins 64 that connect to the cable.

[0044] For example, the connector part 52b includes a tubular part 63a configured to connect the interior of the housing 63 to the exterior of the housing 63. The plurality of pins 64 are located within the tubular part 63a and extend along the extension direction of the tubular part 63a. Furthermore, one end of each of the plurality of pins 64 is connected to the circuit board 62, so that the control part 52a can communicate with the external device via the individual pins 64.

[0045] The plurality of pins 64 of the connector part 52b includes a first CAN pin 64a, which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and a second CAN pin 64b, which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals. Specifically, the first CAN pin 64a is the one of two CAN pins for transmitting and receiving CAN communication signals that has a high potential when the CAN status is "dominant" (mentioned below) in CAN communication. On the other hand, the second CAN pin 64b is the one of two CAN pins for transmitting and receiving CAN communication signals that has a low potential when the CAN status is "dominant" (mentioned below) in CAN communication. <Schaltungsaufbau und Betrieb der Steuervorrichtung gemäß einem Referenzbeispiel>

[0046] With reference to Fig. 5 to Fig. 7, the circuit structure and operation of a control device 52R according to a reference example are explained before the circuit structure and operation of the control device 52 according to the embodiment of the present invention are explained.

[0047] Fig. Fig. 5 is a schematic view illustrating the circuit structure of a circuit board 62R of a control device 52R of a fluid pressure control unit 5R according to a reference example. In the example according to Fig. 5, a diagnostic system 200R, which is a system for implementing the output mode, is composed of a control device 52R and a grounding mechanism 90 mentioned below. The control device 52R according to the reference example differs from the control device 52 according to the present embodiment in the circuit structure of the circuit board 62R, as mentioned below.

[0048] As in Fig. As illustrated in FIG. 5, the first CAN pin 64a and the second CAN pin 64b are connected to a comparator (i.e., comparator) 75 provided on the circuit board 62R. Specifically, the first CAN pin 64a is connected to a first terminal 75a of the comparator 75 via a first electrical line 76a, and the second CAN pin 64b is connected to a second terminal 75b of the comparator 75 via a second electrical line 76b. The comparator 75 outputs the potential difference between the first CAN pin 64a and the second CAN pin 64b to a control part 52a.

[0049] Here, on the board 62R, a high-voltage power supply 71a, a low-voltage power supply 71b, which is a power supply with a voltage lower than that of the high-voltage power supply 71a, resistors 72a, 72b, 72c, diodes 73a, 73b and switching elements 74a, 74b are provided.

[0050] More specifically, the high-voltage supply 71a, the resistor 72a, the diode 73a, and the switching element 74a are arranged in this order and connected in series. The side of the switching element 74a facing away from the diode 73a is connected to the first electrical line 76a for connecting the first CAN pin 64a to the comparator 75. The diode 73a limits the current direction to one direction from the resistor 72a to the switching element 74a.

[0051] Furthermore, resistor 72b and resistor 72c are connected in series. The first electrical line 76a for connecting the first CAN pin 64a to the comparator 75 and the second electrical line 76b for connecting the second CAN pin 64b to the comparator 75 are connected through resistor 72b and resistor 72c. The low-voltage supply 71b is connected between the resistor 72b and resistor 72c.

[0052] Furthermore, diode 73b and switching element 74b are connected in series. The side of diode 73b facing away from switching element 74b is connected to second electrical line 76b for connecting second CAN pin 64b to comparator 75. The side of switching element 74b facing away from diode 73b is connected to the body. Diode 73b limits the current direction to a direction from second electrical line 76b to switching element 74b.

[0053] The switching elements 74a, 74b are, for example, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), whereby by controlling the gate voltage of the individual switching elements, a switching between a state in which the current flows (hereinafter also referred to as "closed state") and a state in which the current is interrupted (hereinafter also referred to as "open state") takes place in the individual switching elements.

[0054] The control part 52a performs CAN communication using the CAN status dependent on the potential of the first CAN pin 64a and the second CAN pin 64b. Specifically, the CAN status indicates a magnitude relationship between the potential difference between the first CAN pin 64a and the second CAN pin 64b (hereinafter also referred to as the "potential difference between the CAN pins") and a threshold value. Specifically, the CAN status when the potential difference between the CAN pins exceeds a threshold value is called "dominant," while the CAN status when the potential difference between the CAN pins falls below a threshold value is called "recessive." The threshold is specified as a value that can be used to appropriately judge whether the potential difference between the CAN pins is so small that it can be considered approximately 0 V or it is relatively large.

[0055] Fig. Fig. 6 is a view illustrating an example of the potential waveform of the first CAN pin 64a and the second CAN pin 64b according to the reference example in the case where CAN communication is performed. Specifically, in the example according to Fig. 6, the power supply to the control device 52R begins at time T1. Time T1 is, for example, a time at which the ignition switch of the saddle-type vehicle 100 is switched from OFF to ON. In the example according to Fig. 6 CAN communication is executed after time T1.

[0056] As in Fig. As illustrated in Figure 6, when CAN communication is executed, the CAN status is switched between “dominant” (corresponding to state S1 according to Fig. 6) and “recessive” (corresponding to the state S2 according to Fig. 6). In CAN communication, for example, "dominant" is represented as "1" and "recessive" as "0", whereby the CAN status history (i.e., CAN status in chronological order) is applied as digital signals.

[0057] When the control device 52R receives CAN communication signals from the external device, the potential difference between the CAN pins is output from the comparator 75 to the control part 52a. Therefore, the control part 52a can detect the CAN status by comparing the detected potential difference with a threshold value.

[0058] Further, when the control device 52R sends CAN communication signals to the external device, the control part 52a can send the CAN communication signals corresponding to a desired CAN status to the external device by controlling the operation of the switching elements 74a, 74b.

[0059] For example, by setting the two switching elements 74a, 74b to the closed state, the potential V1 of the first CAN pin 64a can be set to the same potential as that of the high voltage supply 71a (corresponding to “V_high” according to Fig. 6) and the potential V2 of the second CAN pin 64b to the same potential as that of the body (corresponding to “V_low” according to Fig. 6). This allows the potential difference between the CAN pins to be made relatively large, so that the "dominant" corresponding signals of the CAN communication can be sent to the external device. On the other hand, by setting the two switching elements 74a, 74b to the open state, both the potential V1 of the first CAN pin 64a and the potential V2 of the second CAN pin 64b can be set to the same potential as that of the low-voltage supply 71b (corresponding to "V0" according to Fig. 6). This allows the potential difference between the CAN pins to be made so small that it can be considered approximately 0 V, allowing the "recessive" corresponding CAN communication signals to be sent to the external device.

[0060] The control part 52a can execute a CAN diagnostic mode in which, in a state in which the control device 52R is connected to a diagnostic device called a “test device” (cf. the diagnostic device 400 mentioned below according to Fig. 9), the fluid pressure control mechanism 51 is diagnosed through CAN communication with this diagnostic device. As mentioned above, the CAN diagnostic mode is executed, for example, in a factory, etc., when inspecting the saddle-type vehicle 100 to be delivered. In the CAN diagnostic mode, as described above, various information is sent and received between the control part 52a and the diagnostic device by applying the CAN status history as digital signals.

[0061] Furthermore, as mentioned above, the control part 52a can execute an output mode in which the fluid pressure control mechanism 51 is self-diagnosed independently of CAN communication with a diagnostic device, and information indicating the diagnosis result is output to the notification device 9. As mentioned above, the output mode is executed, for example, after delivery during the inspection of the saddle-type vehicle 100. Execution of the output mode is triggered, as mentioned below, by grounding the second CAN pin 64b.

[0062] Specifically, in the output mode, the control part 52a first self-diagnoses the fluid pressure control mechanism 51. Then, the control part 52a outputs a diagnostic result notification command to the notification device 9 as information indicating the diagnostic result. For example, when a lamp is used as the notification device 9, the control part 52a outputs a command to the lamp, causing the lamp to flash in a flashing mode corresponding to the diagnostic result. Then, the lamp flashes in a flashing mode corresponding to the diagnostic result (e.g., a result indicating the presence of an abnormality occurring at each location of the fluid pressure control mechanism 51 and the condition at a location where the abnormality occurs, etc.). This notifies the diagnostic result, allowing the diagnostic result to be communicated to the user.

[0063] Here, the diagnostic system 200R, which is a system for realizing the output mode, includes a control device 52R and a grounding mechanism 90. The grounding mechanism 90 is a mechanism for grounding (ie, grounding or earthing) the second CAN pin 64b.

[0064] More specifically, the grounding mechanism 90 includes a disconnection part 91 for disconnecting an electrical connection between the second CAN pin 64b and a ground electrode. For example, the disconnection part 91 is an electrically conductive component for physically connecting an electrical line connected to the second CAN pin 64b to an electrical line connected to the ground electrode. By driving the disconnection part 91 by an electrical or human force, the second CAN pin 64b can be grounded.

[0065] Fig. Fig. 7 is a view illustrating an example of the potential waveform of the first CAN pin 64a and the second CAN pin 64b according to the reference example in the case where grounding is performed by the grounding mechanism 90. Specifically, in the example according to Fig. 7, before time T2, the second CAN pin 64b is grounded by the grounding mechanism 90, and at the subsequent time T2, the power supply to the control device 52R begins. Time T2 is, for example, a time at which the saddle-type ignition switch of the vehicle 100 is switched from OFF to ON in a state in which the grounding of the second CAN pin 64b is performed by the grounding mechanism 90. In the example according to Fig. 7, after time T2, the state in which the second CAN pin 64b is grounded is maintained.

[0066] As in Fig. As illustrated in Figure 7, the potential V2 of the second CAN pin 64b is approximately 0 V when the grounding of the second CAN pin 64b is performed by the grounding mechanism 90. Furthermore, in this case, no CAN communication is performed, and the two switching elements 74a, 74b are in the open state. Therefore, the potential V1 of the first CAN pin 64a is the same potential as that of the low-voltage power supply 71b (corresponding to "V0" in FIG. Fig. 7). Consequently, after time T2, the state in which a potential difference exists between the CAN pins is maintained, keeping the CAN state "dominant." As explained above, the CAN state is changed by grounding the second CAN pin 64b.

[0067] Here, the board 62R, as in Fig. 5, a detection circuit 77 is connected to the second electrical line 76b. Specifically, the detection circuit 77 is connected to the side of the second electrical line 76b facing the second CAN pin 64b, relative to the connection point of the resistor 72c and the diode 73b. Fig. 5 illustrates a connection part P1 of the detection circuit 77 to the second electrical line 76b. The detection circuit 77 detects the potential of the second CAN pin 64b. Then, the control part 52a determines whether the output mode can be executed based on the detection result of the detection circuit 77. For example, the control part 52a executes the output mode when it is determined that the potential V2 of the second CAN pin 64b is approximately 0V while the power is being supplied to the control device 52R. Here, since the potential V2 of the second CAN pin 64b is determined to be approximately 0V, it can be judged that the second CAN pin 64b is grounded by the grounding mechanism 90. Therefore, execution of the output mode can be triggered by grounding the second CAN pin 64b.

[0068] As explained above, the control part 52a of the control device 52R determines whether the output mode can be executed based on the detection result of the detection circuit 77. Thus, the execution of the output mode can be triggered by grounding the second CAN pin 64b. Therefore, the CAN diagnostic mode and output mode can be made selectable and executable without providing a pin 64 for the output mode in addition to the two pins 64 for CAN communication (i.e., the first CAN pin 64a and the second CAN pin 64b). Consequently, the increase in the number of pins 64 of the connector part 52b of the control device 52R can be suppressed, so that the space in which devices can be installed can be saved in the saddle-type vehicle 100.

[0069] In the above, the example was explained in which the execution of the output mode is triggered by grounding the second CAN pin 64b. However, it is also possible for the execution of the output mode to be triggered not by grounding the second CAN pin 64b, but by grounding the first CAN pin 64a. In this case, the detection circuit 77 is connected to the first electrical line 76a and detects the potential of the first CAN pin 64a. As explained above, it is sufficient for the detection circuit 77 to be connected to one of the first electrical line 76a and the second electrical line 76b and to detect the potential of a CAN pin that is connected to the one electrical line.

[0070] Here, in order to more appropriately realize the execution of the output mode triggered by grounding the second CAN pin 64b, it is also possible for the control part 52a to determine whether the output mode can be executed based on the CAN status in addition to the detection result of the detection circuit 77. For example, it is also possible for the control part 52a to execute the output mode when the state in which the CAN status is maintained at "dominant" continues for a reference period or longer from time T2 (i.e., the time when power is supplied to the control device 52R). Here, there is an upper limit to the period for which the state in which the CAN status is maintained at "dominant" in CAN communication continues. The reference period is set to be a period longer than such an upper limit.Therefore, since the state in which the CAN status is maintained at "dominant" has continued for a reference period or longer, it can be judged that CAN communication is not being performed and the second CAN pin 64b is grounded. Consequently, the execution of the output mode triggered by grounding the second CAN pin 64b can be more appropriately realized by determining whether the output mode can be executed based on the CAN status.

[0071] In the above example, a CAN status dependent on the potential of the first CAN pin 64a and the second CAN pin 64b is used as a status indicating a magnitude relationship between the potential difference between the CAN pins and a threshold value. However, other items may also be used as such a status. For example, a status indicating the magnitude of the potential difference between the CAN pins in three or more stages may also be used as the CAN status.

[0072] Incidentally, in a situation where the second CAN pin 64b is grounded while the control device 52R is being supplied with power, it is difficult to judge whether the grounding of the second CAN pin 64b was intentionally performed for the output mode or the second CAN pin 64b was inadvertently grounded due to a short circuit occurring on the circuit board 62R. Therefore, since in such a case the control device 52R can cause the notification device 9 such as a lamp, etc., to perform an operation different from that in the normal case (e.g., blinking a lamp in a blinking mode different from that in the normal case), the occurrence of any abnormality in the saddle-type vehicle 100 can be notified to the driver. <Schaltungsaufbau und Betrieb der Steuervorrichtung gemäß der vorliegenden Ausführungsform>

[0073] With reference to Fig. 8 to Fig. 12, the circuit structure and operation of the control device 52 according to the embodiment of the present invention are explained.

[0074] Fig. Fig. 8 is a schematic view illustrating an example of the circuit structure of the circuit board 62 of the control device 52 of the fluid pressure control unit 5 according to the present embodiment. Fig. The circuit structure illustrated in Figure 8 is merely an example. The circuit structure of the circuit board 62 of the control device 52 can largely be the same as that generally known as the circuit structure for implementing CAN communication. In the example according to Fig. 8, a diagnostic system 200, which is a system for realizing the output mode, is composed of the control device 52 and the grounding mechanism 90.

[0075] As in Fig. As illustrated in Figure 8, the control device 52 according to the present embodiment differs from the control device 52R according to the reference example in that a diode 78 is added to the circuit board 62. The diode 78 blocks the current flowing from the second CAN pin 64b to the comparator 75 and the detection circuit 77. In the example according to Fig. 8, the diode 78 includes a first diode 78a and a second diode 78b. The first diode 78a, which is provided on the side of the second electrical line 76b facing the comparator 75 with respect to the connection part P1 with the detection circuit 77, limits the current direction to the direction toward the second CAN pin 64b. This means that the first diode 78a blocks the current flowing from the second CAN pin 64b to the comparator 75. The second diode 78b, which is provided in the detection circuit 77, limits the current direction to the direction toward the second CAN pin 64b. This means that the second diode 78b blocks the current flowing from the second CAN pin 64b to the detection circuit 77.

[0076] As in Fig. As illustrated in Fig. 8, in the saddle-type vehicle 100 after delivery, another device 300 is provided, which shares the electrical lines connected to the first CAN pin 64a and the second CAN pin 64b with the control device 52. The device 300 may be, for example, a device for controlling the operation of a device other than the fluid pressure control mechanism 51 (e.g., engine control unit). In the device 300, a first CAN pin 301a and a second CAN pin 301b are provided for CAN communication. The first CAN pin 64a of the control device 52 and the first CAN pin 301a of the device 300 are connected to each other via an electrical line. The second CAN pin 64b of the control device 52 and the second CAN pin 301b of the device 300 are connected to each other via an electrical line.

[0077] Furthermore, not only the control device 52 but also the device 300 executes the output mode in which a mechanism to be controlled is self-diagnosed and information indicating the diagnosis result is output to the notification device 9. The execution of the output mode of the device 300 is triggered, for example, by grounding the second CAN pin 301b. In this case, the device 300 determines whether the output mode can be executed based on the detection result of the potential of the second CAN pin 301b. The electrical line connected to the second CAN pin 64b and the second CAN pin 301b is shared by the control device 52 and the device 300. Therefore, by driving the separation part 91 of the grounding mechanism 90, the output mode of the control device 52 and the output mode of the device 300 can be started simultaneously.

[0078] Here, the potential of the second CAN pin 301b of the device 300 does not necessarily match the potential of the second CAN pin 64b of the control device 52. For example, a case is conceivable where the potential of the second CAN pin 301b exceeds the potential of the second CAN pin 64b. In this case, due to the potential difference between the second CAN pin 301b and the second CAN pin 64b, the current may flow from the second CAN pin 301b to the second CAN pin 64b and the current may flow to the comparator 75 and the detection circuit 77. In this case, a fluctuation in the potential detected at each point may occur, resulting in faulty operation of the device. For example, the potential of the second CAN pin 301b drops as the current flows from the second CAN pin 301b to the second CAN pin 64b.This may result in the second CAN pin 301b being erroneously determined to be grounded even though the second CAN pin 301b is not grounded, thereby erroneously starting the output mode of the device 300.

[0079] As mentioned above, the control device 52 according to the present embodiment provides a diode 78 that blocks the current flowing from the second CAN pin 64b to the comparator 75 and the detection circuit 77. This prevents the current from flowing to the control device 52 from the other device 300, which shares the electrical lines connected to the CAN pins with the control device 52, so that fluctuation in the potential detected at each location is suppressed, thereby preventing erroneous operation of the device.

[0080] Fig. Fig. 9 is a schematic view illustrating the state of the example according to Fig. 8 in CAN diagnostic mode. As in Fig. As illustrated in FIG. 9, in the CAN diagnostic mode, the fluid pressure control mechanism 51 is diagnosed through CAN communication between the control device 52 and the diagnostic device 400, referred to as a "tester," in a state where the control device 52 is connected to a diagnostic device 400. The diagnostic device 400 is connected to electrical lines that are connected to the first CAN pin 64a and the second CAN pin 64b.

[0081] As mentioned above, in the control device 52, the first diode 78a is provided between the second CAN pin 64b and the comparator 75. Therefore, a voltage drop across the first diode 78a occurring during CAN communication between the control device 52 and the diagnostic device 400 may make it difficult to properly perform CAN communication. Therefore, a pull-down resistor 79 is used in the CAN diagnostic mode to properly perform CAN communication between the control device 52 and the diagnostic device 400. The pull-down resistor 79 is removed after the CAN diagnostic mode is completed and upon delivery of the saddle-type vehicle 100.

[0082] The pull-down resistor 79 is provided on the side of the second electrical line 76b facing the second CAN pin 64b with respect to the first diode 78a. The pull-down resistor 79 maintains the potential of its installation position at approximately 0 V. Therefore, the potential of the second CAN pin 64b is approximately 0 V. The pull-down resistor 79 can also be provided in the electrical line connecting the second CAN pin 64b to the diagnostic device 400. In this case, the potential of the second CAN pin 64b is also approximately 0 V.

[0083] Fig. Fig. 10 is a view illustrating an example of the potential waveform of the first CAN pin 64a and the second CAN pin 64b according to the present embodiment in the case where CAN communication is performed. In the example according to Fig. 10, the potential V2 of the second CAN pin 64b is, as mentioned above, kept at approximately 0 V by the pull-down resistor 79. In the example according to Fig. 10, the power supply to the control device 52 begins at time T3. The time T3 is, for example, a time at which the ignition switch of the saddle-type vehicle 100 is switched from OFF to ON. In the example according to Fig. 10, the CAN communication is executed after time T3.

[0084] For example, by setting the switching element 74a to the closed state, the potential V1 of the first CAN pin 64a can be set to the potential corresponding to the high voltage supply 71a (more precisely, the potential obtained by subtracting the voltage drop amount across the resistor 72a, the diode 73a and the switching element 74a from the potential of the high voltage supply 71a; in Fig. 10, corresponding to “V0”). This allows the CAN status to be set to “dominant” (corresponding to state S1 according to Fig. 10). On the other hand, by setting the two switching elements 74a, 74b to the open state, the potential V1 of the first CAN pin 64a can be set to approximately 0 V. This allows the CAN status to be set to “recessive” (corresponding to the state S2 according to Fig. 10) because the potential of the second CAN pin 64b is approximately 0 V. More specifically, to set the CAN status to "recessive" as described above, it is necessary to additionally insert a resistor between the low-voltage supply 71b and the resistors 72b, 72c, which has a much higher resistance than the resistors 72b, 72c and the pull-down resistor 79. Consequently, for example, by transmitting and receiving information indicating the CAN status history based on a digital signal representing "dominant" as "1" and "recessive" as "0," CAN communication between the control device 52 and the diagnostic device 400 can be carried out in a suitable manner.

[0085] Fig. 11 is a schematic view illustrating another example of the circuit structure of the circuit board 62 of the control device 52 of the fluid pressure control unit 5. The example according to Fig. 11 differs from the above-mentioned example according to Fig. 8 in the number and arrangement of diodes 78.

[0086] As the example according to Fig. 8 the example differs according to Fig. 11 of the control device 52R according to the reference example in that the diode 78 is added to the circuit board 62. In the example according to Fig. 11 contains the diode 78 in contrast to the example according to Fig. 8, a third diode 78c. The third diode 78c, which is provided on the side of the second electrical line 76b facing the second CAN pin 64b relative to the connection part P1 with the detection circuit 77, limits the current direction to the direction toward the second CAN pin 64b. This means that the third diode 78c blocks the current flowing from the second CAN pin 64b to the comparator 75 and the detection circuit 77.

[0087] In the above-mentioned example according to Fig. 8, when the potential of the second CAN pin 301b exceeds the potential of the second CAN pin 64b, the first diode 78a and the second diode 78b suppress the current from flowing from the second CAN pin 301b to the second CAN pin 64b. In the example according to Fig. 11, when the potential of the second CAN pin 301b exceeds the potential of the second CAN pin 64b, the third diode 78c suppresses the current from flowing from the second CAN pin 301b to the second CAN pin 64b. Therefore, in the example according to Fig. 11 as in the example according to Fig. 8, the current can be suppressed from flowing from the further device 300, which shares the electrical lines connected to CAN pins with the control device 52, to the control device 52, so that a fluctuation of the potential detected at each point is suppressed and thereby an erroneous operation of the device can be suppressed.

[0088] Fig. Fig. 12 is a schematic view illustrating the state of the example according to Fig. 11 in CAN diagnostic mode. In the example according to Fig. 11, a voltage drop across the third diode 78c occurring during the execution of the CAN communication between the control device 52 and the diagnostic device 400 may cause it to become difficult to execute the CAN communication properly. Therefore, as in the example according to Fig. 9 the pull-down resistor 79 is used in the CAN diagnostic mode to carry out the CAN communication between the control device 52 and diagnostic device 400 in an appropriate manner.

[0089] In the example according to Fig. 12, the pull-down resistor 79 is provided on the side of the second electrical line 76b facing the second CAN pin 64b relative to the third diode 78c. This keeps the potential of the second CAN pin 64b at approximately 0 V. In the example according to Fig. 11 may also be used as in the with reference to Fig. In the example explained in Figure 10, by setting the potential V1 of the first CAN pin 64a to the same potential as that of the low-voltage supply 71b, the CAN status can be set to "dominant," and by setting the potential V1 of the first CAN pin 64a to approximately 0 V, the CAN status can be set to "recessive." Therefore, CAN communication between the control device 52 and the diagnostic device 400 can be carried out appropriately. <Vorteile der Steuervorrichtung gemäß der vorliegenden Ausführungsform>

[0090] The following is an explanation of the advantages of the control device 52 according to the embodiment of the present invention.

[0091] The plurality of pins 64 of the connector part 52b of the control device 52 includes the first CAN pin 64a, which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and the second CAN pin 64b, which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals. The first CAN pin 64a is connected to the first terminal 75a of the comparator 75 via the first electrical line 76a, and the second CAN pin 64b is connected to the second terminal 75b of the comparator 75 via the second electrical line 76b. The detection circuit 77 is connected to one of the first electrical line 76a and the second electrical line 76b (in the example described above, the second electrical line 76b), which detects the potential of a CAN pin connected to one of the electrical lines (in the example described above, the second CAN pin 64b).Subsequently, the control part 52a determines whether the output mode can be executed based on the detection result of the detection circuit 77. This allows the execution of the output mode to be triggered, for example, by grounding a CAN pin. Therefore, the CAN diagnostic mode and output mode can be selected and executed without providing an output mode pin in addition to the two pins for CAN communication.

[0092] Furthermore, the control device 52 is provided with a diode 78 that blocks the current flowing from a CAN pin to the comparator 75 and the detection circuit 77. This prevents the current from flowing from the other device 300, which shares the electrical lines connected to the CAN pins with the control device 52, to the control device 52, thus suppressing fluctuations in the potential detected at each location and thereby preventing erroneous operation of the device. Consequently, the saddle-type vehicle 100 can appropriately save the space in which devices can be installed.

[0093] Preferably, in the control device 52, the diode 78 includes the first diode 78a, which is provided on the side of an electrical line (in the above-described example, the second electrical line 76b) facing the comparator 75 with respect to the connection part P1 with the detection circuit 77 and limits the current direction to the direction toward a CAN pin (in the above-described example, the second CAN pin 64b), and the second diode 78b, which is provided in the detection circuit 77 and limits the current direction to the direction toward one CAN pin. This appropriately suppresses the flow of current from the further device 300, which shares the electrical lines connected to CAN pins with the control device 52, to the control device 52.Therefore, suppression of fluctuation of the potential detected at each location is appropriately realized, and thereby suppression of erroneous operation of the device is appropriately realized.

[0094] Preferably, in the control device 52, the diode 78 includes the third diode 78c, which is provided on the side of an electrical line (in the above-described example, the second electrical line 76b) facing a CAN pin (in the above-described example, the second CAN pin 64b) with respect to the connection part P1 with the detection circuit 77, and limits the current direction to the direction toward the one CAN pin. This appropriately suppresses the flow of current from the other device 300, which shares the electrical lines connected to CAN pins with the control device 52, to the control device 52. Therefore, the suppression of fluctuation in the potential detected at each point is appropriately realized, and thereby the suppression of erroneous operation of the device is appropriately realized.

[0095] Preferably, in the control device 52 in CAN diagnostic mode, the pull-down resistor 79 is provided on the side of an electrical line (in the above-described example, the second electrical line 76b) facing a CAN pin (in the above-described example, the second CAN pin 64b) with respect to the diode 78, or in the electrical line connecting the one CAN pin to the diagnostic device 400. This allows the diode 78 to be provided in the control device 52, and thus the CAN communication between the control device 52 and the diagnostic device 400 can be carried out in a suitable manner.

[0096] Preferably, in the control device 52, the control part 52a determines whether the output mode can be executed based on the CAN status, which depends on the potential of the first CAN pin 64a and the second CAN pin 64b. Thus, by utilizing the CAN communication protocol, the execution of the output mode triggered by grounding the second CAN pin 64b can be realized more appropriately.

[0097] Preferably, in the control device 52, the CAN status indicates a magnitude relationship between the potential difference between the first CAN pin 64a and the second CAN pin 64b and a threshold value. This allows the execution of the output mode triggered by grounding the second CAN pin 64b to be more appropriately implemented.

[0098] Preferably, the CAN status of the control device 52 is changed by grounding a CAN pin (in the example described above, the second CAN pin 64b). This allows the CAN status-dependent judgment of whether the one CAN pin is grounded to be implemented more appropriately.

[0099] Preferably, in the control device 52, when one CAN pin (in the above-described example, the second CAN pin 64b) is grounded while the control device 52 is being supplied with power, the control part 52a executes the output mode. As mentioned above, in such a case, it is difficult to judge whether the grounding of the one CAN pin for the output mode was intentionally performed or the one CAN pin was inadvertently grounded due to a short circuit occurring on the circuit board 62. Therefore, since by executing the output mode in such a case, an operation different from that in the normal case (e.g., flashing a lamp in a flashing mode different from that in the normal case) can be performed by the notification device 9 such as a lamp, etc., the occurrence of any abnormality in the saddle-type vehicle 100 can be notified to the user (i.e., the vehicle driver).

[0100] The present invention is not limited to the explanation of the individual embodiments. For example, only a portion of the individual embodiments may be implemented. [List of reference symbols]

[0101] 1 frame, 2 handlebar, 3 front wheel, 3a rotor, 4 rear wheel, 4a rotor, 5 fluid pressure control unit, 5R fluid pressure control unit, 9 notification device, 10 brake system, 11 first brake operating part, 12 front wheel brake mechanism, 13 second brake operating part, 14 rear wheel brake mechanism, 21 master cylinder, 22 reservoir, 23 brake calipers, 24 wheel cylinders, 25 main flow passages, 26 sub-flow passages, 27 supply passages, 31 charge valves, 32 release valves, 33 accumulators, 34 pumps, 35 first valves, 36 second valves, 51 fluid pressure control mechanism, 51a main body, 52 control device, 52a control part, 52b connector part, 52R control device, 61 Terminals, 62 circuit board, 62R circuit board, 63 housing, 63a tubular part, 64 pins, 64a first CAN pin, 64b second CAN pin, 71a high voltage supply, 71b low voltage supply, 72a resistor, 72b resistor, 72c resistor, 73a diode, 73b diode, 74a switching element, 74b switching element, 75 comparator,75a first terminal, 75b second terminal, 76a first electrical line, 76b second electrical line, 77 detection circuit, 78 diode, 78a first diode, 78b second diode, 78c third diode, 79 pull-down resistor, 90 grounding mechanism, 91 disconnection part, 100 saddle-type vehicle, 200 diagnostic system, 200R diagnostic system, 300 device, 301a first CAN pin, 301b second CAN pin, 400 diagnostic device, P1 connection part., QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2016 / 185514 A1

[0003]

Claims

[1] Control device (52) for a device (51) installed in a vehicle (100) of the saddle type, comprising a control part (52a) capable of controlling the operation of the device (51), a CAN diagnostic mode in which the device (51) is diagnosed by CAN communication with a diagnostic device (400), and an output mode in which the device (51) is self-diagnosed independently of the CAN communication and information indicating the diagnostic result is output to a notification device (9), and a plug part (52b) for attaching a cable, wherein the plug part (52b) contains a plurality of pins (64) which are connected to the cable, wherein in the plurality of pins (64), a first CAN pin (64a), which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and a second CAN pin (64b), which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals, are included, wherein the first CAN pin (64a) is connected via a first electrical line (76a) to a first terminal (75a) of a comparator (75), and the second CAN pin (64b) is connected via a second electrical line (76b) to a second terminal (75b) of the comparator (75), wherein a detection circuit (77) is connected to one of the first electrical line (76a) and the second electrical line (76b), which detects the potential of a CAN pin connected to the one electrical line, wherein the control part (52a) determines whether the output mode can be executed based on the detection result of the detection circuit (77), and wherein a diode (78) is provided in the control device (52) which blocks the current flowing from the one CAN pin to the comparator (75) and the detection circuit (77). [2] Control device according to claim 1, wherein the diode (78) a first diode (78a) which is provided on the side of the one electrical line facing the comparator (75) with respect to a connecting part (P1) with the detection circuit (77) and limits the current direction to the direction towards the one CAN pin, and a second diode (78b) provided in the detection circuit (77) and limiting the current direction to the direction toward one CAN pin. [3] Control device according to claim 1, wherein the diode (78) a third diode (78c) which is provided on the side of the one electrical line facing the one CAN pin with respect to a connecting part (P1) with the detection circuit (77) and limits the current direction to the direction towards the one CAN pin. [4] Control device according to claim 1, wherein in the CAN diagnostic mode a pull-down resistor (79) is provided on the side of the one electrical line facing the one CAN pin with respect to the diode (78) or in an electrical line for connecting the one CAN pin to the diagnostic device (400). [5] The control device according to claim 1, wherein the control part (52a) determines whether the output mode can be executed based on a CAN status depending on the potential of the first CAN pin (64a) and the second CAN pin (64b). [6] The control device according to claim 5, wherein the CAN status indicates a magnitude relationship between the potential difference between the first CAN pin (64a) and the second CAN pin (64b) and a threshold value. [7] The control device according to claim 5, wherein the CAN status is changed by grounding the one CAN pin. [8] The control device according to claim 1, wherein when the one CAN pin is grounded while the control device (52) is supplied with power, the control part (52a) executes the output mode. [9] Control unit comprising a control device according to one of claims 1 to 8 and the device (51), whereby the device (51) is a control mechanism including components for controlling a braking force generated on the caliper-type vehicle (100). [10] Diagnostic system (200) for diagnosing a device (51) installed in a vehicle (100) of the saddle type, comprising a control device (52) and a grounding mechanism (90), wherein the control device (52) a control part (52a) capable of controlling the operation of the device (51), a CAN diagnostic mode in which the device (51) is diagnosed by CAN communication with a diagnostic device (400), and an output mode in which the device (51) is self-diagnosed independently of the CAN communication and information indicating the diagnostic result is output to a notification device (9), and a plug part (52b) for attaching a cable, wherein the plug part (52b) contains a plurality of pins (64) which are connected to the cable, wherein in the plurality of pins (64), a first CAN pin (64a), which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and a second CAN pin (64b), which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals, are included, wherein the first CAN pin (64a) is connected via a first electrical line (76a) to a first terminal (75a) of a comparator (75), and the second CAN pin (64b) is connected via a second electrical line (76b) to a second terminal (75b) of the comparator (75), wherein a detection circuit (77) is connected to one of the first electrical line (76a) and the second electrical line (76b), which detects the potential of a CAN pin connected to the one electrical line, wherein the control part (52a) determines whether the output mode can be executed based on the detection result of the detection circuit (77), wherein a diode (78) is provided in the control device (52) which blocks the current flowing from the one CAN pin to the comparator (75) and the detection circuit (77), and wherein the grounding mechanism (90) grounds one CAN pin. [11] Diagnostic method for diagnosing a device (51) installed in a vehicle (100) of the saddle type by a control device (52), wherein the control device (52) a control part (52a) capable of controlling the operation of the device (51), a CAN diagnostic mode in which the device (51) is diagnosed by CAN communication with a diagnostic device (400), and an output mode in which the device (51) is self-diagnosed independently of the CAN communication and information indicating the diagnostic result is output to a notification device (9), and a plug part (52b) for attaching a cable, wherein the plug part (52b) contains a plurality of pins (64) which are connected to the cable, wherein in the plurality of pins (64), a first CAN pin (64a), which is a high-voltage side CAN pin for transmitting and receiving CAN communication signals, and a second CAN pin (64b), which is a low-voltage side CAN pin for transmitting and receiving CAN communication signals, are included, wherein the first CAN pin (64a) is connected via a first electrical line (76a) to a first terminal (75a) of a comparator (75), and the second CAN pin (64b) is connected via a second electrical line (76b) to a second terminal (75b) of the comparator (75), wherein a detection circuit (77) is connected to one of the first electrical line (76a) and the second electrical line (76b), which detects the potential of a CAN pin connected to the one electrical line, wherein the control part (52a) determines whether the output mode can be executed based on the detection result of the detection circuit (77), and wherein a diode (78) is provided in the control device (52) which blocks the current flowing from the one CAN pin to the comparator (75) and the detection circuit (77).

Images