A control system for human-powered vehicles.

Abstract

To provide a highly reliable control system for a human-powered vehicle.SOLUTION: A control system for a human-powered vehicle includes: a brake device configured to brake a wheel; a brake operation device operated for activating the brake device; a first communication path configured to communicate a first operation signal between the brake device and the brake operation device; and a second communication path which is configured to communicate a second operation signal between the brake device and the brake operation device, and which is different from the first communication path.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a control system for a human powered vehicle. [Background technology]

[0002] Patent Document 1 discloses an electric braking system for a human-powered vehicle. When an operating device is operated, a braking device is activated by electricity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-202659 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a human-powered vehicle, a control system that operates an operating device, such as a brake device, with electric power in response to the operation of an operating device is required to have high reliability. One objective of the present disclosure is to provide a reliable control system for a human-powered vehicle. [Means for solving the problem]

[0005] A control system for a human-powered vehicle according to a first aspect of the present disclosure includes a braking device configured to brake wheels, a brake operating device operated to actuate the braking device, a first communication path configured to communicate a first actuation signal between the braking device and the brake operating device, and a second communication path different from the first communication path configured to communicate a second actuation signal between the braking device and the brake operating device. The control system according to the first aspect has redundancy due to the existence of multiple communication paths, which improves the reliability of communication between the brake device and the brake operating device, thereby improving the reliability of the control system.

[0006] A control system of a second aspect according to the first aspect of the present disclosure includes a first communication control device provided in the brake operation device, a second communication control device provided in the brake device, and a third communication control device provided in the brake operation device and at least one of the first communication path, wherein the first communication control device is configured to transmit the first actuation signal via the first communication path in response to operation of the brake operation device, the second communication control device is configured to transmit a response signal in response to receiving the first actuation signal, and the third communication control device is configured to transmit the second actuation signal to the second communication control device via the second communication path if it cannot receive the response signal from the second communication control device after transmitting the first actuation signal from the first communication control device. According to the control system of the second aspect, when the second communication control device cannot receive the first actuation signal, the second communication control device can receive the second actuation signal via the second communication path, thereby improving the reliability of the actuation of the braking device.

[0007] In the control system for a human-powered vehicle of a third aspect according to the second aspect of the present disclosure, the third communication control device is provided in the brake operation device, and the first communication control device also serves as the third communication control device. According to the control system of the third aspect, the configuration of the control system is simplified.

[0008] A control system for a human-powered vehicle according to a fourth aspect of the present disclosure includes an actuation device, an operating device operated to actuate the actuation device, a first communication control device provided in the operating device, a second communication control device provided in the actuation device, a first communication path configured to communicate a first actuation signal between the first communication control device and the second communication control device, a third communication control device provided in the operating device and at least one of the first communication paths, and a second communication path configured to communicate a second actuation signal between the second communication control device and the third communication control device and different from the first communication path, wherein the first communication control device is configured to transmit the first actuation signal via the first communication path in response to an operation of the operating device, the second communication control device is configured to transmit a response signal in response to receiving the first actuation signal, and the third communication control device is configured to transmit the second actuation signal via the second communication path when the response signal from the second communication control device cannot be received after transmitting the first actuation signal from the first communication control device. According to the control system of the fourth aspect, when the second communication control device cannot receive the first actuation signal, the second communication control device can receive the second actuation signal via the second communication path, thereby improving the reliability of the actuation of the actuation device.

[0009] In the control system of the fifth aspect according to the fourth aspect of the present disclosure, the actuation device includes at least one of a braking device, an electronic transmission, an electronically assisted drive unit, a suspension, and an adjustable seat post. The control system of the fifth aspect improves the reliability of the operation of at least one of the braking device, the electronic transmission, the electronically assisted drive unit, the suspension, and the adjustable seat post.

[0010] In the control system of a sixth aspect according to the fourth or fifth aspect of the present disclosure, the third communication control device is provided in the operation device, and the first communication control device also serves as the third communication control device. According to the control system of the sixth aspect, the configuration of the control system is simplified.

[0011] In the control system of a seventh aspect according to any one of the second to sixth aspects of the present disclosure, the third communication control device is provided in a component located midway along the first communication path. According to the control system of the seventh aspect, when an abnormality or the like occurs in the portion of the first communication path between the third communication control device and the second communication control device and the third communication control device is unable to receive a response signal, the second communication control device can receive a second activation signal from the third communication control device via the second communication path.

[0012] In the control system of aspect 8 according to any one of aspects 2 to 7 of the present disclosure, the second communication control device is configured to transmit a first response signal via the first communication path in response to receiving the first actuation signal, and the second communication control device is configured to transmit a second response signal via the second communication path in response to receiving the second actuation signal. According to the control system of the eighth aspect, when an abnormality occurs in the first communication path, the second communication control device can communicate via the second communication path.

[0013] In a ninth aspect control system according to any one of the second to eighth aspects of the present disclosure, one of the first communication path and the second communication path is a wired communication path and the other is a wireless communication path, and each of the first communication control device, the second communication control device, and the third communication control device includes a wired communication unit configured to perform wired communication and a wireless communication unit configured to perform wireless communication. According to the control system of the ninth aspect, if an abnormality occurs in one of the wired communication path and the wireless communication path, communication can be performed via the other communication path. Furthermore, compared to a case in which both the first communication path and the second communication path are wired communication paths, the appearance of the human-powered vehicle is improved and wiring processing for the human-powered vehicle is simplified.

[0014] In a control system of a tenth aspect according to any one of the second to eighth aspects of the present disclosure, the first communication path is a wired communication path, and the second communication path is a wireless communication path, and each of the first communication control device, the second communication control device, and the third communication control device includes a wired communication unit configured to perform wired communication via the first communication path, and a wireless communication unit configured to perform wireless communication via the second communication path. According to the control system of the tenth aspect, when an abnormality occurs in the wired communication path, communication can be performed via the wireless communication path. Also, when there is no abnormality in the wired communication path, the wireless communication path is not used, so that the power consumption required for communication is reduced.

[0015] In the control system according to an eleventh aspect according to any one of the first to eighth aspects of the present disclosure, each of the first communication path and the second communication path is a wired communication path or a wireless communication path. According to the control system of the eleventh aspect, when an abnormality occurs in one of the first communication path and the second communication path, communication can be performed via the other communication path.

[0016] In a control system according to a twelfth aspect of the present disclosure, one of the first communication path and the second communication path is a wired communication path, and the other is a wireless communication path. According to the control system of the twelfth aspect, if an abnormality occurs in one of the wired communication path and the wireless communication path, communication can be performed via the other communication path. Furthermore, compared to a case in which both the first communication path and the second communication path are wired communication paths, the appearance of the human-powered vehicle is improved and wiring processing for the human-powered vehicle is simplified.

[0017] In a control system according to a thirteenth aspect according to any one of the first to eighth aspects of the present disclosure, the first communication path is a wired communication path, and the second communication path is a wireless communication path. According to the control system of the thirteenth aspect, when an abnormality occurs in the wired communication path, communication can be performed via the wireless communication path.

[0018] A control system for a human-powered vehicle according to a fourteenth aspect of the present disclosure comprises a braking device configured to brake wheels, a brake operating device operated to actuate the braking device, a preparatory braking operation device different from the brake operating device, and a control unit configured to control an actuation device including the braking device according to a control mode, the control mode having a first mode and a second mode, the control unit configured not to allow actuation of the braking device in response to operation of the preparatory braking operation device when the control mode is the first mode, and the control unit configured to actuate the braking device in response to operation of the preparatory braking operation device when the control mode is the second mode. According to the control system of the fourteenth aspect, in the second mode, the brake device can be operated using the backup brake operation device, thereby improving the reliability of the operation of the brake device.

[0019] The control system of a fifteenth aspect in accordance with the fourteenth aspect of the present disclosure further includes a communication path provided between the braking device and the brake operating device, and the control unit is configured to switch the control mode from the first mode to the second mode when an abnormality occurs in at least one of the braking device, the brake operating device, and the communication path when the first mode is selected as the control mode. According to the control system of the fifteenth aspect, when an abnormality occurs in at least one of the brake device, the brake operating device, and the communication path, the brake device can be operated using the backup brake operating device.

[0020] A control system of a sixteenth aspect in accordance with the fifteenth aspect of the present disclosure further includes a detection device configured to detect an abnormality in at least one of the braking device, the brake operating device, and the communication path, and the control unit is configured to switch the control mode from the first mode to the second mode when the detection device detects an abnormality when the first mode is selected as the control mode. According to the control system of the sixteenth aspect, when an abnormality is detected by the detection device in at least one of the brake device, the brake operation device, and the communication path, the brake device can be operated using the backup brake operation device, thereby improving the reliability of the operation of the brake device.

[0021] In the control system of a seventeenth aspect according to the fifteenth or sixteenth aspect of the present disclosure, the communication path is a wired communication path. According to the control system of the seventeenth aspect, when an abnormality occurs in the wired communication path, the brake device can be operated using the backup brake operating device.

[0022] In the control system of aspect 18 according to any one of aspects 14 to 17 of the present disclosure, the brake operating device has a brake lever and a sensor that detects operation of the brake lever, and the control unit is configured to switch the control mode from the first mode to the second mode when an abnormality occurs in the sensor when the first mode is selected as the control mode. According to the control system of the eighteenth aspect, when an abnormality occurs in the sensor that detects the operation of the brake lever, the brake device can be operated using the backup brake operation device.

[0023] The control system of a 19th aspect according to any one of the 14th to 18th aspects of the present disclosure further includes a mode switching operation unit that is operated to switch the control mode from one of the first mode and the second mode to the other. According to the control system of the nineteenth aspect, the rider can operate the braking device using the auxiliary brake operation device by operating the mode switching operation unit to switch the control mode from the first mode to the second mode.

[0024] In the control system of aspect 20 according to any one of aspects 14 to 19 of the present disclosure, the control unit is configured to operate an actuator other than the braking device in response to operation of the preliminary braking operation device when the control mode is the first mode. According to the control system of the twentieth aspect, a reserve brake operating device used to operate an operating device other than the brake device in the first mode can be used to operate the brake device in the second mode.

[0025] In the control system of a twenty-first aspect according to the twentieth aspect of the present disclosure, the actuation device different from the braking device includes at least one of an electric transmission, an electric assisted drive unit, a suspension, and an adjustable seat post. According to the control system of the 21st aspect, a backup brake operating device used to operate at least one of the electric transmission, the electric assisted drive unit, the suspension, and the adjustable seat post in a first mode can be used to operate the brake device in a second mode.

[0026] In the control system of aspect 22 according to any one of aspects 14 to 21 of the present disclosure, the preliminary braking operation device is a crank, and the control unit is configured not to allow operation of the braking device in response to reverse rotation of the crank when the control mode is the first mode, and the control unit is configured to operate the braking device in response to reverse rotation of the crank when the control mode is the second mode. According to the control system of the twenty-second aspect, when the control mode is the second mode, the braking device can be actuated by rotating the crank in the reverse direction.

[0027] In the control system of a twenty-third aspect according to the twenty-second aspect of the present disclosure, the control unit is configured to control the braking device to exert a braking force according to a reverse rotation speed of the crank. According to the control system of the twenty-third aspect, the braking force of the braking device can be adjusted by changing the reverse rotation speed of the crank.

[0028] In the control system of a 24th aspect according to any one of the 14th to 23rd aspects of the present disclosure, the control unit is provided in at least one of the preliminary braking operation device, the braking device, and the electric assist drive unit. According to the control system of the twenty-fourth aspect, when the control mode is the second mode, the brake device can be operated using the auxiliary brake operation device. Effect of the Invention

[0029] According to the control system for a human-powered vehicle of the present disclosure, a highly reliable control system for a human-powered vehicle can be provided. [Brief description of the drawings]

[0030] [Figure 1] 1 is a side view of a human-powered vehicle equipped with a control system according to a first embodiment. [Diagram 2] FIG. 2 is a side view of a brake operation device provided in the human-powered vehicle of FIG. [Diagram 3] FIG. 2 is a schematic diagram of a braking device provided in the human-powered vehicle of FIG. 1. [Figure 4] FIG. 2 is a block diagram showing the electrical configuration of a control system provided in the human-powered vehicle of FIG. 1. [Diagram 5] 5 is a block diagram showing an electrical configuration of a brake operation device included in the control system of FIG. 4. [Figure 6] FIG. 5 is a block diagram showing an electrical configuration of a braking device included in the control system of FIG. 4. [Figure 7] FIG. 5 is a block diagram showing the electrical configuration of an electric power assisted drive unit included in the control system of FIG. 4. [Figure 8] FIG. 5 is a block diagram showing the electrical configuration of a cycle computer included in the control system of FIG. 4. [Figure 9] 5 is a block diagram showing an electrical configuration of a shift operation device included in the control system of FIG. 4. [Figure 10] 6 is a flowchart showing a process executed by a control unit of the brake operating device of FIG. 5. [Figure 11]7 is a flowchart showing a process executed by a control unit of the braking device of FIG. 6. [Figure 12] 8 is a flowchart showing the process executed by a control unit of the power-assisted drive unit of FIG. 7. [Figure 13] FIG. 11 is a block diagram showing the electrical configuration of a control system according to a second embodiment. [Figure 14] 14 is a flowchart showing an abnormality detection process executed by a control unit of the brake operation device of FIG. 13. [Figure 15] 14 is a flowchart showing an abnormality display process executed by a control unit of the cycle computer of FIG. 13. [Figure 16] 14 is a flowchart showing a mode switching operation detection process executed by a control unit of the cycle computer of FIG. 13. [Figure 17] 14 is a flowchart showing a mode switching process executed by a control unit of the braking device in FIG. 13, a control unit of the power assisted drive unit in FIG. 13, and a control unit of the preliminary braking operation device in FIG. [Figure 18] 14 is a flowchart showing a braking operation process executed by a control unit of the preliminary braking operation device of FIG. 13; [Figure 19] 14 is a flowchart showing a braking operation process executed by a control unit of the electrically assisted drive unit of FIG. 13. [Figure 20] FIG. 11 is a block diagram showing an electrical configuration of a control system according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] First Embodiment A control system for a human-powered vehicle according to the first embodiment will be described with reference to Figs. 1 to 12. The human-powered vehicle 10 shown in Fig. 1 is a vehicle that has at least one wheel and can be driven at least by human-powered driving force. The human-powered vehicle 10 includes various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, hand bikes, and recumbents. The number of wheels that the human-powered vehicle 10 has is not limited. The human-powered vehicle 10 also includes, for example, one-wheeled vehicles and vehicles with three or more wheels. The human-powered vehicle 10 is not limited to vehicles that can be driven only by human-powered driving force. The human-powered vehicle 10 includes E-bikes that use not only human-powered driving force but also the driving force of an electric motor for propulsion. The E-bike includes an electrically assisted bicycle whose propulsion is assisted by an electric motor. Hereinafter, the human-powered vehicle 10 will be described as a bicycle.

[0032] In this specification, the following directional terms, such as “front,” “rear,” “forward,” “backward,” “left,” “right,” “sideways,” “upward,” and “downward,” and any other similar directional terms, refer to those directions determined with reference to a rider facing the handlebars 24 in a reference position on the human-powered vehicle 10 (e.g., on a saddle or seat).

[0033] As shown in FIG. 1, the human-powered vehicle 10 includes a front wheel 12, a rear wheel 14, a human-powered vehicle body 16, a drive mechanism 18, a battery unit 38, an actuator 40, a cycle computer 42, and an operation unit 44. The human-powered vehicle body 16 includes a frame 20, a front fork 22, a handlebar 24, and a seat post 26. The actuator 40 includes braking devices 40A and 40B, an electric transmission 40C, an electric assist drive unit 40D, a suspension 40E, an adjustable seat post 40F, a front lamp 40G, and a rear lamp 40H. In this embodiment, the braking device 40A is a front braking device 40A supported by the front fork 22. In this embodiment, the braking device 40B is a rear braking device 40B supported by the frame 20. The actuator 40 may include only one of the front braking device 40A and the rear braking device 40B. The actuator 40 is also referred to as a human-powered vehicle component. The front fork 22 is supported by the frame 20 and connected to the axle 12A of the front wheel 12. The handlebar 24 is detachably connected to the front fork 22 via a stem 24A. The seat post 26 is connected to the frame 20 and supported by the frame 20.

[0034] The battery unit 38 is attached, for example, to the frame 20. The cycle computer 42 is attached, for example, to the handlebar 24. The human-powered vehicle 10 may include a plurality of operation units 44. The plurality of operation units 44 are attached, for example, to the right and left portions of the handlebar 24, respectively. Fig. 1 shows the operation unit 44 attached to the right portion of the handlebar 24.

[0035] The human-powered vehicle 10 runs when human-powered driving force is transmitted to the rear wheels 14 via a drive mechanism 18. The drive mechanism 18 includes a crank 28, a pair of pedals 30, a front rotor 32, a rear rotor 34, and a chain 36.

[0036] The crank 28 includes a crankshaft 28A and a pair of crank arms 28B. When the crank 28 is provided on the electric assist drive unit 40D, the drive mechanism 18 may be configured to include a part of the electric assist drive unit 40D. In this case, the drive mechanism 18 may be configured to include, for example, an output portion of the electric assist drive unit 40D, and further include a coupling portion that couples the crankshaft 28A and the output portion of the electric assist drive unit 40D.

[0037] In this embodiment, the crankshaft 28A is rotatably supported by a housing of an electric assist drive unit 40D that is connected to the frame 20. A pair of crank arms 28B are attached to the crankshaft 28A. A pair of pedals 30 are rotatably connected to each of the crank arms 28B.

[0038] The front rotor 32 is coupled to the crankshaft 28A. In this embodiment, the front rotor 32 includes one or more front sprockets 32A. The rear rotor 34 includes one or more rear sprockets 34A. A chain 36 is wound around the front rotor 32 and the rear rotor 34. When the crank 28 rotates in one direction due to a human driving force applied to the pedal 30, the rear wheel 14 also rotates in one direction due to the front rotor 32, the chain 36, and the rear rotor 34. In another example, the front rotor 32 includes one or more front pulleys, and the rear rotor 34 includes one or more rear pulleys connected to the front rotor 32 by a belt.

[0039] The battery unit 38 includes a battery 38A and a battery holder 38B for detachably mounting the battery 38A to the frame 20. The battery 38A includes a rechargeable battery. The battery 38A supplies power to at least one of the actuators 40 electrically connected to the battery 38A. The battery unit 38 may be housed within the frame 20. At least one of the actuators 40 may not be supplied with power from the battery 38A and may include a separate battery.

[0040] As shown in FIG. 2, the operation unit 44 includes one or more operation devices 50. The operation device 50 can be operated by the rider. The operation device 50 is operated to operate the actuation device 40. The actuation device 40 may include at least one of the brake devices 40A and 40B, the electric transmission 40C, the electric assist drive unit 40D, the suspension 40E, and the adjustable seat post 40F. The actuation device 40 may further include at least one of the front lamp 40G and the rear lamp 40H. The actuation device 40 is an electric actuation device. The operation device 50 may include a built-in battery. As shown in FIG. 4, the operation device 50 may include the brake operation devices 50A and 50B, the shift operation device 50C, the assist mode switching operation device 50D, the suspension mode switching operation device 50E, and the adjustable seat post operation device 50F.

[0041] The brake operating devices 50A, 50B are operated to operate the brake devices 40A, 40B. As shown in FIG. 4, in this embodiment, the brake operating devices 50A, 50B include a right brake operating device 50A operated to operate the front brake device 40A and a left brake operating device 50B operated to operate the rear brake device 40B. The shift operating device 50C is operated to operate the electric transmission 40C. The assist mode switching operating device 50D is operated to switch the assist mode of the electric assist drive unit 40D. The suspension mode switching operating device 50E is operated to switch the state of the suspension 40E. The adjustable seat post operating device 50F is operated to operate the adjustable seat post 40F. The operating device 50 may further include a lamp operating device. The lamp operating device is operated to operate the front lamp 40G and the rear lamp 40H.

[0042] The electric assist drive unit 40D operates to switch the assist mode in response to the operation of the assist mode switching operation device 50D. The assist mode switching operation device 50D is an operation device that is operated to operate the electric assist drive unit 40D. The suspension 40E operates to switch the state in response to the operation of the suspension mode switching operation device 50E. The suspension mode switching operation device 50E is an operation device that is operated to operate the suspension 40E.

[0043] In one example, the right operation unit 44 shown in FIG. 2 may include a right brake operation device 50A, a shift operation device 50C, and an assist mode switching operation device 50D. The right brake operation device 50A has a brake lever 52. The shift operation device 50C has a shift-up switch 54A and a shift-down switch 54B. The assist mode switching operation device 50D has a mode switching switch 56. The left operation unit 44 may include a left brake operation device 50B, a suspension mode switching operation device 50E, and an adjustable seat post operation device 50F. The left brake operation device 50B has a brake lever. The suspension mode switching operation device 50E has a mode switching switch. The adjustable seat post operation device 50F has an adjustment switch. The brake operation devices 50A and 50B include brake levers for road bikes, but may also include brake levers for mountain bikes or brake levers for city bikes. The brake operating devices 50A, 50B may be configured so as not to include a brake lever.

[0044] The braking devices 40A, 40B are configured to brake the wheels 12, 14. In this embodiment, the front braking device 40A is configured to brake the front wheel 12. In this embodiment, the rear braking device 40B is configured to brake the rear wheel 14. The braking devices 40A, 40B may be rim brakes, disc brakes, or roller brakes. The braking devices 40A, 40B are, for example, electric braking devices. As shown in FIG. 3, in this embodiment, the braking devices 40A, 40B are electric disc brakes. Each of the braking devices 40A, 40B includes a disc rotor 62, a pair of brake pads 64, a brake actuator 66, a second communication control device 84, and a battery 68. The brake actuator 66 includes a motor unit 66A and a conversion mechanism 66B. The conversion mechanism 66B is, for example, a cam or a ball spline. In response to the operation of the brake lever 52 of the brake operation devices 50A, 50B, the motor unit 66A is actuated. The conversion mechanism 66B converts the rotational motion of the motor unit 66A into linear motion, thereby moving at least one brake pad 64 and pressing it against the disc rotor 62. The brake pad 64 applies the brakes to the wheels 12, 14 by pinching the disc rotor 62. The second communication control device 84 includes a wired connection unit 70 to which the communication cable 92 is connected.

[0045] The electric transmission 40C can change the ratio of the rotation speed of the rear wheel 14 to the rotation speed of the crank 28. As shown in FIG. 1, the electric transmission 40C includes a rear derailleur. The rear derailleur is provided near the rear end of the frame 20. When the rear rotating body 34 includes a plurality of rear sprockets 34A, the rear derailleur shifts the chain 36 between the plurality of rear sprockets 34A. The electric transmission 40C may further include a front derailleur. The front derailleur is provided near the crankshaft 28A. When the front rotating body 32 includes a plurality of front sprockets 32A, the front derailleur shifts the chain 36 between the plurality of front sprockets 32A. In response to the operation of the shift-up switch 54A or the shift-down switch 54B of the shift operation device 50C, the electric transmission 40C performs a gear shifting operation.

[0046] The electric assist drive unit 40D assists the propulsion of the human-powered vehicle 10. The electric assist drive unit 40D includes an assist actuator 72. The assist actuator 72 includes an electric motor. In this embodiment, the assist actuator 72 transmits driving force to a power transmission path of the human-powered driving force from the crankshaft 28A to the front rotating body 32. The electric assist drive unit 40D includes a torque sensor that detects the torque applied to the crank 28. Preferably, the electric assist drive unit 40D further includes a crank sensor 74 that detects the rotation of the crank 28. The assist actuator 72 is driven according to the detection result of the torque sensor. The assist actuator 72 operates in a plurality of assist modes with different assist ratios. The electric assist drive unit 40D operates to switch the assist mode in response to the operation of the mode changeover switch 56 of the assist mode changeover operation device 50D.

[0047] The suspension 40E is provided on the front fork 22 and attenuates an impact applied to the front wheel 12. The suspension 40E is selectively switched between a locked state in which the function of the suspension 40E is restricted and a released state in which the function of the suspension 40E is not restricted. The suspension 40E may include a suspension provided on the frame 20 and capable of attenuating an impact applied to the rear wheel 14. The suspension 40E may be any of a hydraulic type, a pneumatic type, and a hybrid type of hydraulic and pneumatic type. The suspension 40E includes an electric actuator such as an electric motor or an electromagnetic solenoid. The electric actuator controls a valve that opens and closes an oil or air flow path. The suspension 40E is selectively switched between a locked state and a released state in response to the operation of a mode switching switch of the suspension mode switching operation device 50E. The suspension 40E may be configured to be able to change the damping force to a plurality of stages, in addition to the locked state and the released state. In this case, the suspension 40E may be configured to switch the damping force by one stage each time the suspension mode switching operation device 50E is operated.

[0048] The adjustable seatpost 40F is attached to the seatpost 26. The adjustable seatpost 40F raises and lowers the seatpost 26 relative to the frame 20. The adjustable seatpost 40F includes an electric actuator, such as an electric motor. The adjustable seatpost 40F raises or lowers the seatpost 26 in response to the operation of an adjustment switch of the adjustable seatpost operating device 50F.

[0049] The front lamp 40G is attached to the front fork 22 or the handlebar 24. The rear lamp 40H is attached to the rear of the frame 20. The lamps 40G, 40H are configured to be switchable between on and off. The lamps 40G, 40H are turned on or off in response to the operation of a lamp operating device.

[0050] As shown in Fig. 4, a control system 80 for a human-powered vehicle includes an actuation device 40, an operation device 50, a first communication control device 82, a second communication control device 84, a first communication path P1, a third communication control device 86, and a second communication path P2. The first communication control device 82 is provided in the operation device 50. In the example shown in Fig. 4, each of the right side brake operation device 50A and the left side brake operation device 50B has the first communication control device 82. The second communication control device 84 is provided in the actuation device 40. In the example shown in Fig. 4, each of the front side brake device 40A and the rear side brake device 40B has the second communication control device 84.

[0051] The third communication control device 86 may be provided in the operating device 50, and the first communication control device 82 may also serve as the third communication control device 86. The third communication control device 86 may be provided in the brake operating devices 50A, 50B, and the first communication control device 82 may also serve as the third communication control device 86. In this embodiment, each of the right-side brake operating device 50A and the left-side brake operating device 50B has a first communication control device 82 that also serves as the third communication control device 86. In this embodiment, since the first communication control device 82 also serves as the third communication control device 86, hereinafter, the third communication control device 86 may be referred to as the third communication control device 82, 86.

[0052] The first communication path P1 is configured to communicate a first actuation signal between the first communication control device 82 and the second communication control device 84. The first communication control device 82 is configured to transmit the first actuation signal via the first communication path P1 in response to an operation of the operation device 50. The second communication control device 84 is configured to transmit a response signal in response to receiving the first actuation signal. The third communication control device 82, 86 is provided in at least one of the operation device 50 and the first communication path P1. The second communication path P2 is configured to communicate a second actuation signal between the second communication control device 84 and the third communication control device 82, 86, and is a communication path different from the first communication path P1. The third communication control device 82, 86 is configured to transmit the second actuation signal via the second communication path P2 when it cannot receive a response signal from the second communication control device 84 after transmitting the first actuation signal from the first communication control device 82.

[0053] 4, a control system 80 for a human-powered vehicle includes braking devices 40A, 40B, brake operating devices 50A, 50B, a first communication path P1, and a second communication path P2. The first communication path P1 is configured to communicate a first actuation signal between the braking devices 40A, 40B and the brake operating devices 50A, 50B. The second communication path P2 is configured to communicate a second actuation signal between the braking devices 40A, 40B and the brake operating devices 50A, 50B, and is a communication path different from the first communication path P1.

[0054] The control system 80 further includes a first communication control device 82, a second communication control device 84, and third communication control devices 82, 86. The first communication control device 82 is provided in the brake operating devices 50A, 50B. The first communication control device 82 is configured to transmit a first actuation signal via a first communication path P1 in response to an operation of the brake operating devices 50A, 50B. The second communication control device 84 is provided in the brake devices 40A, 40B. The second communication control device 84 is configured to transmit a response signal in response to receiving the first actuation signal. The third communication control devices 82, 86 are provided in at least one of the brake operating devices 50A, 50B and the first communication path P1. The third communication control devices 82, 86 are configured to transmit a second actuation signal to the second communication control device 84 via the second communication path P2 when a response signal from the second communication control device 84 cannot be received after the transmission of the first actuation signal from the first communication control device 82.

[0055] In this embodiment, the second communication control device 84 is configured to transmit a first response signal over the first communication path P1 in response to receiving the first activation signal. The second communication control device 84 is configured to transmit a second response signal over the second communication path P2 in response to receiving the second activation signal.

[0056] As shown in FIG. 4, in this embodiment, the multiple operating devices 50 are each connected to the cycle computer 42 by a communication cable 92. For example, the shift operating device 50C, the assist mode switching operating device 50D, the suspension mode switching operating device 50E, and the adjustable seat post operating device 50F are each connected to the cycle computer 42 by a communication cable 92. The cycle computer 42 is connected to a first junction 94 by the communication cable 92. The first junction 94 is connected to the electric assist drive unit 40D by the communication cable 92. The right side brake operating device 50A and the left side brake operating device 50B are each connected to the first junction 94 by the communication cable 92. The battery 38A, the front lamp 40G, and the rear lamp 40H are electrically connected to the electric assist drive unit 40D. The electric assist drive unit 40D is connected to a second junction 96 by the communication cable 92. The multiple actuation devices 40 are each connected to the second junction 96 by the communication cable 92. For example, the front braking device 40A, the rear braking device 40B, the electric transmission 40C, the adjustable seat post 40F, and the suspension 40E are each connected to the second junction 96 by a communication cable 92. The communication cable 92 is, for example, a power line configured to perform power line communication (PLC). The communication cable 92 may be a communication line that does not carry power.

[0057] The operating device 50 having the first communication control device 82 may be at least one of the shift operating device 50C, the assist mode switching operating device 50D, the suspension mode switching operating device 50E, and the adjustable seatpost operating device 50F, instead of or in addition to the brake operating devices 50A, 50B. In this case, the first communication control device 82 may also serve as the third communication control device 86.

[0058] The actuation device 40 having the second communication control device 84 may be at least one of the electric transmission 40C, the electric assisted drive unit 40D, the suspension 40E, and the adjustable seat post 40F instead of or in addition to the braking devices 40A, 40B.

[0059] The third communication control device 86 may be provided in a component located on the first communication path P1. In this embodiment, the electric assist drive unit 40D located on the first communication path P1 has the third communication control device 86. The third communication control device 86 may be provided in at least one of the first junction 94 and the second junction 96. Alternatively, the third communication control device 86 may be provided at any location in the first communication path P1.

[0060] Each of the first communication path P1 and the second communication path P2 is a wired communication path or a wireless communication path. The wired communication path is configured to be able to perform, for example, power line communication (PLC). Preferably, one of the first communication path P1 and the second communication path P2 is a wired communication path, and the other is a wireless communication path. As shown in FIG. 5 to FIG. 7, each of the first communication control device 82, the second communication control device 84, and the third communication control device 86 includes a wired communication unit 104, 114, 124 configured to perform wired communication, and a wireless communication unit 106, 116, 126 configured to perform wireless communication. In this embodiment, the first communication path P1 is a wired communication path, and the second communication path P2 is a wireless communication path. 5 to 7, each of the first communication control device 82, the second communication control device 84, and the third communication control device 86 includes a wired communication unit 104, 114, 124 and a wireless communication unit 106, 116, 126. The wired communication units 104, 114, 124 are configured to perform wired communication via a first communication path P1. The wireless communication units 106, 116, 126 are configured to perform wireless communication via a second communication path P2.

[0061] As shown in FIG. 4, in this embodiment, the communication cable 92 connecting the right side brake operating device 50A to the front side brake device 40A via the first junction 94, the electric assist drive unit 40D, and the second junction 96 forms the first communication path P1 which is a wired communication path. The communication cable 92 connecting the left side brake operating device 50B to the rear side brake device 40B via the first junction 94, the electric assist drive unit 40D, and the second junction 96 also forms the first communication path P1 which is a wired communication path. The second communication path P2 which is a wireless communication path is provided between the right side brake operating device 50A and the front side brake device 40A. The second communication path P2 which is a wireless communication path is also provided between the left side brake operating device 50B and the rear side brake device 40B. Each of the brake operating devices 50A, 50B and the corresponding brake devices 40A, 40B can perform both wired communication and wireless communication with each other. The second communication path P2, which is a wireless communication path, may be provided between each of the brake operation devices 50A, 50B and the electric assist drive unit 40D, or may be provided between each of the brake devices 40A, 40B and the electric assist drive unit 40D. The electric assist drive unit 40D may be capable of performing both wired communication and wireless communication with each of the brake operation devices 50A, 50B, or may be capable of performing both wired communication and wireless communication with each of the brake devices 40A, 40B.

[0062] FIG. 5 shows the electrical configuration of the right-side brake operating device 50A. The left-side brake operating device 50B has a similar configuration, so the left-side brake operating device 50B will also be described with reference to FIG. 5. Each of the brake operating devices 50A, 50B includes a first communication control device 82, a battery 108, and a sensor 100. The first communication control device 82 is a circuit including a control unit 102, a wired communication unit 104, and a wireless communication unit 106. The wired communication unit 104 is a circuit configured to perform wired communication with each component in the control system 80 via a communication cable 92. The wireless communication unit 106 is a circuit configured to perform wireless communication with the corresponding brake devices 40A, 40B. The wireless communication unit 106 may be configured to perform wireless communication with components other than the brake devices 40A, 40B, for example, the electrically assisted drive unit 40D. The battery 108 supplies power to the first communication control device 82. When the sensor 100 detects the operation of the brake lever 52, it outputs an operation detection signal at a level corresponding to the amount of operation of the brake lever 52 to the control unit 102. When the control unit 102 receives the operation detection signal, it transmits an actuation signal including information indicating the amount of operation of the brake lever 52 to the corresponding braking device 40A, 40B. The actuation signal includes a first actuation signal transmitted from the wired communication unit 104 through the first communication path P1 and a second actuation signal transmitted from the wireless communication unit 106 through the second communication path P2.

[0063] FIG. 6 shows the electrical configuration of the front braking device 40A. The rear braking device 40B has a similar configuration, so the rear braking device 40B will also be described with reference to FIG. 6. Each of the braking devices 40A, 40B includes a second communication control device 84, a battery 68, and a brake actuator 66. The second communication control device 84 is a circuit including a control unit 112, a wired communication unit 114, and a wireless communication unit 116. The wired communication unit 114 is a circuit configured to perform wired communication with each component in the control system 80 via a communication cable 92. The wireless communication unit 116 is a circuit configured to perform wireless communication with the corresponding brake operating device 50A, 50B. The wireless communication unit 116 may be configured to perform wireless communication with a component other than the brake operating device 50A, 50B, for example, the electrically assisted drive unit 40D. The battery 68 supplies power to the second communication control device 84 and the brake actuator 66. When the control unit 112 receives the actuation signal via the wired communication unit 114 or the wireless communication unit 116, it transmits a response signal via the wired communication unit 114 or the wireless communication unit 116. The control unit 112 drives the brake actuator 66 so as to exert a braking force according to the amount of operation of the brake lever 52. The response signal includes a first response signal transmitted from the wired communication unit 114 via the first communication path P1 and a second response signal transmitted from the wireless communication unit 116 via the second communication path P2.

[0064] As shown in FIG. 7, the electrically assisted drive unit 40D includes a third communication control device 86 and an assist actuator 72. The third communication control device 86 is a circuit including a control unit 122, a wired communication unit 124, and a wireless communication unit 126. The wired communication unit 124 is a circuit configured to perform wired communication with each component in the control system 80 via a communication cable 92. The wireless communication unit 126 is a circuit configured to perform wireless communication with the brake operating devices 50A, 50B and the brake devices 40A, 40B. When the control unit 122 receives an actuation signal from the brake operating devices 50A, 50B via the wired communication unit 124 or the wireless communication unit 126, it transmits the actuation signal to the brake devices 40A, 40B via the wired communication unit 124 or the wireless communication unit 126. If the control unit 122 cannot receive a response signal from the braking devices 40A, 40B through the wired communication unit 124 or the wireless communication unit 126 after receiving an activation signal from the braking operation devices 50A, 50B, the control unit 122 transmits an activation signal to the braking devices 40A, 40B through the wired communication unit 124 or the wireless communication unit 126. The activation signal includes a first activation signal transmitted from the wired communication unit 124 through the first communication path P1 and a second activation signal transmitted from the wireless communication unit 126 through the second communication path P2.

[0065] As shown in FIG. 8, the cycle computer 42 includes a display unit 138, an operation unit 136, a control unit 132, and a communication unit 134. The operation unit 136 can be operated by the rider. In one example, the operation unit 136 includes one or more buttons. The display unit 138 is configured to display various information related to the human-powered vehicle 10. The various information related to the human-powered vehicle 10 includes information related to the vehicle speed, information related to the cadence, information related to the heart rate, information related to the distance traveled, and the like. The display unit 138 is configured to display information related to the actuation device 40 controlled in response to the operation of the operation device 50. The display unit 138 includes a display panel. The display panel includes, for example, a liquid crystal display panel or an organic EL (Electro Luminescence) display panel. The communication unit 134 is a circuit configured to perform wired communication with each component in the control system 80 via a communication cable 92. The communication unit 134 may include a wireless communication unit.

[0066] FIG. 9 shows the electrical configuration of the shift operation device 50C. The assist mode switching operation device 50D, the suspension mode switching operation device 50E, and the adjustable seatpost operation device 50F have the same configuration, so these operation devices 50D, 50E, and 50F will also be described with reference to FIG. 9. Each operation device 50C, 50D, 50E, and 50F includes an operation unit 146, a control unit 142, and a communication unit 144. The operation unit 146 can be operated by the rider. The shift operation device 50C includes a shift-up switch 54A and a shift-down switch 54B as the operation unit 146. The assist mode switching operation device 50D includes a mode switching switch 56 as the operation unit 146. The suspension mode switching operation device 50E includes a mode switching switch as the operation unit 146. The adjustable seatpost operation device 50F includes an adjustment switch as the operation unit 146. The control unit 142 transmits an actuation signal through the communication unit 144 in response to an operation of the operation unit 146. The communication unit 144 is a circuit configured to perform wired communication with each component in the control system 80 via a communication cable 92. The communication unit 144 may include a wireless communication unit. In this case, the actuation devices 40 corresponding to each of the operation devices 50C, 50D, 50E, and 50F also include a wireless communication unit.

[0067] 5 to 9, each of the control units 102, 112, 122, 132, and 142 is a processor or processing circuit that executes a predetermined program. The control units 102, 112, 122, 132, and 142 include, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control units 102, 112, 122, 132, and 142 preferably include a memory that stores a program. The memory includes, for example, a nonvolatile memory and a volatile memory. The nonvolatile memory includes, for example, at least one of a ROM (Read-Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), and a flash memory. The volatile memory includes, for example, a RAM (Random Access Memory). Each of the control units 102, 112, 122, 132, and 142 is not limited to one that executes software processing. For example, each of the control units 102, 112, 122, 132, and 142 may include a dedicated hardware circuit (e.g., an ASIC; Application Specific Integrated Circuit, etc.) that executes at least a part of the processing to be executed through hardware processing. Each of the control units 102, 112, 122, 132, and 142 may be configured to include at least one of a circuit that executes software processing according to a program and a hardware circuit that executes hardware processing.

[0068] The operation of the control unit 102 of the first communication control device 82 provided in each of the brake operating devices 50A, 50B will be described with reference to Fig. 10. The process shown in the flowchart of Fig. 10 is repeatedly executed at predetermined time intervals. In the flowchart shown in Fig. 10, the first communication control device 82 also serves as the third communication control device 86.

[0069] In step S1, the control unit 102 determines whether or not the sensor 100 has detected the operation of the brake lever 52 based on the operation detection signal from the sensor 100. If the control unit 102 determines in step S1 that the sensor 100 has not detected the operation of the brake lever 52, the process ends. If the control unit 102 determines in step S1 that the sensor 100 has detected the operation of the brake lever 52, the process proceeds to step S2. In step S2, the control unit 102 transmits a first actuation signal from the wired communication unit 104 to the corresponding braking device 40A, 40B via the first communication path P1, and proceeds to step S3.

[0070] In step S3, the control unit 102 determines whether or not a first response signal has been received from the corresponding braking device 40A, 40B. For example, if the first response signal has been received within a specified time from the transmission of the first actuation signal, a positive determination is made in step S3. Alternatively, if the first response signal has been received while the transmission of the first actuation signal is repeated a specified number of times, a positive determination is made in step S3. If the control unit 102 determines in step S3 that the first response signal has been received, it ends the process. If the control unit 102 determines in step S3 that the first response signal has not been received, it proceeds to step S4, where it transmits a second actuation signal from the wireless communication unit 106 to the corresponding braking device 40A, 40B via the second communication path P2, and ends the process.

[0071] The operation of the control unit 112 of the second communication control device 84 provided in each of the braking devices 40A, 40B will be described with reference to Fig. 11. The process shown in the flowchart of Fig. 11 is repeatedly executed at predetermined time intervals.

[0072] In step S11, the control unit 112 determines whether or not a first actuation signal has been received from the first communication path P1 through the wired communication unit 114. If the control unit 112 determines in step S11 that the first actuation signal has been received, the process proceeds to step S12. In step S12, the control unit 112 transmits a first response signal to the corresponding brake operating device 50A, 50B from the wired communication unit 114 through the first communication path P1, and then proceeds to step S13. In step S13, the control unit 112 actuates the brake actuators 66 of the braking devices 40A, 40B, and ends the process.

[0073] In step S11, if the control unit 112 determines that the first actuation signal has not been received, the process proceeds to step S14. In step S14, the control unit 112 determines whether or not the second actuation signal has been received from the second communication path P2 through the wireless communication unit 116. In step S14, if the control unit 112 determines that the second actuation signal has not been received, the process ends. In step S14, if the control unit 112 determines that the second actuation signal has been received, the process proceeds to step S15. In step S15, the control unit 112 transmits a second response signal to the corresponding brake operating device 50A, 50B from the wireless communication unit 116 through the second communication path P2, and proceeds to step S13. In step S13, the control unit 112 activates the brake actuator 66 of the brake device 40A, 40B, and ends the process.

[0074] The operation of the control unit 122 of the third communication control device 86 included in the electromotive assist drive unit 40D will be described with reference to Fig. 12. The process shown in the flowchart of Fig. 12 is repeatedly executed at predetermined time intervals.

[0075] In step S21, the control unit 122 determines whether or not a first actuation signal has been received from the first communication path P1 through the wired communication unit 124. If the control unit 122 determines in step S21 that the first actuation signal has not been received, the process ends. If the control unit 122 determines in step S21 that the first actuation signal has been received, the process proceeds to step S22. In step S22, the control unit 122 transmits the first actuation signal from the wired communication unit 124 through the first communication path P1 to the brake devices 40A, 40B corresponding to the brake operating devices 50A, 50B that are the transmission sources of the first actuation signal, and then proceeds to step S23.

[0076] In step S23, the control unit 122 judges whether or not the first response signal has been received from the braking devices 40A, 40B, which are the transmission destinations of the first actuation signal, through the first communication path P1 and the wired communication unit 124. For example, if the first response signal has been received within a specified time from the transmission of the first actuation signal, a positive judgment is made in step S23. Alternatively, if the first response signal has been received while the transmission of the first actuation signal is repeated a specified number of times, a positive judgment is made in step S23. When the control unit 122 judges that the first response signal has been received in step S23, it ends the process. For example, the first response signal is sent from the electric assist drive unit 40D to the braking operation devices 50A, 50B, which are the transmission sources of the first actuation signal, through the first communication path P1. When the control unit 122 judges that the first response signal has not been received in step S23, it proceeds to step S24. In step S24, the control unit 122 transmits a second activation signal from the wireless communication unit 126 via the second communication path P2 to the braking devices 40A, 40B corresponding to the braking operation devices 50A, 50B that are the source of the first activation signal, and then terminates the processing.

[0077] When the processing of FIG. 12 is executed, the control unit 102 of the first communication control device 82 equipped in each brake operation device 50A, 50B does not need to execute the processing of step S4 of FIG. 10 even if it does not receive the first response signal, if it receives the second response signal directly from the braking device 40A, 40B or via the electric assist drive unit 40D.

[0078] If the control unit 122 of the electric assist drive unit 40D determines that the first response signal has not been received in step S23 of FIG. 12, it may determine that there is an abnormality in the portion of the first communication path P1 between the electric assist drive unit 40D and the braking devices 40A, 40B, the second junction 96, or the braking devices 40A, 40B.

[0079] <Second embodiment> A control system 80 for a human-powered vehicle according to a second embodiment will be described with reference to Figures 13 to 19. Among the components of the control system 80 of the second embodiment, components common to the first embodiment are given the same reference numerals as in the first embodiment, and duplicated explanations will be omitted. Please also refer to Figures 1 to 3 and Figures 5 to 9 as appropriate.

[0080] 13, a control system 80 for a human-powered vehicle includes braking devices 40A, 40B, brake operation devices 50A, 50B, a preliminary brake operation device 150, and control units 112, 122, 142. The preliminary brake operation device 150 is an operation device 50 different from the brake operation devices 50A, 50B.

[0081] The preliminary brake operating device 150 may include at least one of a shift operating device 50C, an assist mode switching operating device 50D, a suspension mode switching operating device 50E, and an adjustable seat post operating device 50F. The preliminary brake operating device 150 may further include a lamp operating device. The preliminary brake operating device 150 may be the crank 28.

[0082] The control unit 112, 122, 142 may be provided in at least one of the preliminary brake operation device 150, the brake devices 40A, 40B, and the electric assist drive unit 40D. The control unit 112, 122, 142 is configured to control the actuation device 40 including the brake devices 40A, 40B according to a control mode. The control mode has a first mode and a second mode. When the control mode is the first mode, the control unit 112, 122, 142 is configured not to allow the actuation of the brake devices 40A, 40B in response to the operation of the preliminary brake operation device 150. When the control mode is the second mode, the control unit 112, 122, 142 is configured to actuate the brake devices 40A, 40B in response to the operation of the preliminary brake operation device 150.

[0083] The control system 80 further includes communication paths P1, P2 provided between the braking devices 40A, 40B and the brake operating devices 50A, 50B. The control units 112, 122, 142 are configured to switch the control mode from the first mode to the second mode when an abnormality occurs in at least one of the braking devices 40A, 40B, the brake operating devices 50A, 50B, and the communication paths P1, P2 when the first mode is selected as the control mode. In one example, the communication path is a wired communication path. The control system 80 of the second embodiment may or may not include a wireless communication path. That is, the communication control devices 82, 84, 86 shown in FIG. 5 to FIG. 7 include at least one of a wired communication unit and a wireless communication unit.

[0084] The control system 80 may further include a detection device configured to detect an abnormality in at least one of the braking devices 40A, 40B, the brake operating devices 50A, 50B, and the communication paths P1, P2. The control units 112, 122, 142 are configured to switch the control mode from the first mode to the second mode when the detection device detects an abnormality while the first mode is selected as the control mode.

[0085] The detection device includes, for example, at least one of the control unit 102 of the brake operating device 50A, 50B, the control unit 112 of the brake device 40A, 40B, and the control unit 122 of the electric assist drive unit 40D. For example, the control unit 102 of the brake operating device 50A, 50B may be configured to detect an abnormality in at least one of the wired communication unit 104 and the wireless communication unit 106. The control unit 112 of the brake device 40A, 40B may be configured to detect an abnormality in at least one of the wired communication unit 114 and the wireless communication unit 116. The control unit 122 of the electric assist drive unit 40D may be configured to detect an abnormality in at least one of the wired communication unit 124 and the wireless communication unit 126. Furthermore, the control units 102, 112, 122 may be configured to detect an abnormality in the communication paths P1, P2 through communication between the brake operating device 50A, 50B, the brake device 40A, 40B, and the electric assist drive unit 40D. In addition, when the communication paths P1 and P2 are wireless communication paths, the abnormality of the wireless communication paths includes an abnormality of the wireless communication units 106, 116, and 126.

[0086] The brake operating devices 50A, 50B have a brake lever 52 and a sensor 100 that detects the operation of the brake lever 52. The control units 112, 122, 142 may be configured to switch the control mode from the first mode to the second mode when an abnormality occurs in the sensor 100 while the first mode is selected as the control mode. The abnormality in the sensor 100 may be detected by the control units 102 of the brake operating devices 50A, 50B. For example, the control unit 102 determines that an abnormality occurs in the sensor 100 when the level of a signal input from the sensor 100 is abnormal.

[0087] The control system 80 may further include a mode switching operation unit 136A that is operated to switch the control mode from one of the first mode and the second mode to the other. In this embodiment, the mode switching operation unit 136A is included in the operation unit 136 provided in the cycle computer 42. For example, when the rider notices an abnormality in the brake operation devices 50A, 50B, the rider operates the mode switching operation unit 136A. Then, the control unit 132 of the cycle computer 42 transmits an abnormality signal through the communication unit 134. In response to this abnormality signal, the control unit 142 of the preliminary brake operation device 150, the control unit 112 of the brake devices 40A, 40B, and the control unit 122 of the electrically assisted drive unit 40D switch the control mode from the first mode to the second mode.

[0088] When the control mode is the first mode, the control unit 112, 122, 142 may be configured to operate an actuation device 40 different from the brake devices 40A, 40B in response to the operation of the preliminary brake operation device 150. The actuation device 40 different from the brake devices 40A, 40B may include at least one of an electric transmission 40C, an electric assist drive unit 40D, a suspension 40E, and an adjustable seat post 40F. The actuation device 40 may further include at least one of a front lamp 40G and a rear lamp 40H. The preliminary brake operation device 150 and the corresponding actuation device 40 may be configured to be capable of performing at least one of wired communication and wireless communication.

[0089] The preliminary brake operating device 150 may be the crank 28. The control units 112, 122 of the brake devices 40A, 40B and the electric assist drive unit 40D are configured not to allow the brake devices 40A, 40B to operate in response to the reverse rotation of the crank 28 when the control mode is the first mode. The control units 112, 122 are configured to operate the brake devices 40A, 40B in response to the reverse rotation of the crank 28 when the control mode is the second mode. The control unit 122 of the electric assist drive unit 40D detects the reverse rotation of the crank 28 based on a detection signal from the crank sensor 74.

[0090] The control units 112, 122 may be configured to control the braking devices 40A, 40B to exert a braking force corresponding to the reverse rotation speed of the crank 28. For example, when the control mode is the second mode, the control unit 122 of the electric assist drive unit 40D detects the reverse rotation speed of the crank 28 based on a detection signal from the crank sensor 74, and transmits an actuation signal including information indicating the reverse rotation speed to the braking devices 40A, 40B. When the control mode is the second mode, the control unit 112 of the braking devices 40A, 40B drives the brake actuator 66 based on the actuation signal from the electric assist drive unit 40D so that a braking force corresponding to the reverse rotation speed is exerted.

[0091] An abnormality detection process executed by the control unit 102 of the brake operating devices 50A, 50B will be described with reference to Fig. 14. The process shown in the flowchart of Fig. 14 is repeatedly executed at predetermined time intervals.

[0092] The control unit 102 determines whether or not an abnormality is detected in step S31. As described above, the abnormality may include, for example, an abnormality in the brake operating devices 50A, 50B, or an abnormality in the communication paths P1, P2. The abnormality in the brake operating devices 50A, 50B may include an abnormality in the sensor 100, or an abnormality in at least one of the wired communication unit 104 and the wireless communication unit 106. If the control unit 102 determines in step S31 that an abnormality is detected, the process proceeds to step S32, where the control unit 102 transmits an abnormality signal and ends the process. The abnormality signal may include information indicating the type of abnormality. If the control unit 102 determines in step S31 that an abnormality is not detected, the process ends.

[0093] The control unit 122 of the electrically assisted drive unit 40D and the control unit 112 of the braking devices 40A and 40B may also execute the same process as the process shown in FIG. 14. For example, the control unit 122 of the electrically assisted drive unit 40D may determine whether an abnormality in the communication paths P1 and P2 or at least one of the wired communication unit 124 and the wireless communication unit 126 has been detected, and may transmit an abnormality signal when an abnormality is detected. When an abnormality is detected, the control unit 122 of the electrically assisted drive unit 40D may switch the control mode from the first mode to the second mode. The control unit 112 of the braking devices 40A and 40B may determine whether an abnormality in the communication paths P1 and P2 or at least one of the wired communication unit 114 and the wireless communication unit 116 has been detected, and may transmit an abnormality signal when an abnormality is detected. When an abnormality is detected, the control unit 112 of the braking devices 40A and 40B may switch the control mode from the first mode to the second mode.

[0094] The abnormality display process executed by the control unit 132 of the cycle computer 42 will now be described with reference to Figure 15. The process shown in the flowchart of Figure 15 is repeatedly executed at predetermined time intervals.

[0095] In step S41, the control unit 132 determines whether or not an abnormality signal has been received. If in step S41, the control unit 132 determines that an abnormality signal has not been received, the process ends. If in step S41, the control unit 132 determines that an abnormality signal has been received, the process proceeds to step S42. In step S42, the control unit 132 displays on the display unit 138 of the cycle computer 42 a message indicating that an abnormality has occurred and that the control mode will be switched from the first mode to the second mode, and ends the process. The control unit 132 may be configured to display the type of abnormality on the display unit 138.

[0096] The mode-switching operation detection process executed by the control unit 132 of the cycle computer 42 will now be described with reference to Figure 16. The process shown in the flowchart of Figure 16 is repeatedly executed at predetermined time intervals.

[0097] In step S51, the control unit 132 determines whether or not a switching operation to the second mode via the mode switching operation unit 136A has been detected. If the control unit 132 determines in step S51 that a switching operation to the second mode has not been detected, the process ends. When the rider performs a switching operation from the first mode to the second mode via the mode switching operation unit 136A of the cycle computer 42, the control unit 132 determines in step S51 that a switching operation to the second mode has been detected, and the process proceeds to step S52. In step S52, the control unit 132 displays on the display unit 138 of the cycle computer 42 that there is an abnormality and that the control mode will be switched from the first mode to the second mode, and the process proceeds to step S53. In step S53, the control unit 132 transmits an abnormality signal and ends the process.

[0098] A mode switching process executed by the control unit 142 of the preliminary braking operation device 150, the control unit 112 of the braking devices 40A and 40B, and the control unit 122 of the electric assist drive unit 40D will be described with reference to Fig. 17. The process shown in the flowchart of Fig. 17 is repeatedly executed at predetermined time intervals.

[0099] In step S61, the control unit 112, 122, 142 determines whether or not an abnormal signal has been received. The source of the abnormal signal may be at least one of the brake operating devices 50A, 50B, the brake devices 40A, 40B, the electric assist drive unit 40D, and the cycle computer 42. If the control unit 112, 122, 142 determines in step S61 that an abnormal signal has not been received, the process proceeds to step S62. In step S62, the control unit 112, 122, 142 maintains the control mode in the first mode and ends the process. If the control unit 112, 122, 142 determines in step S61 that an abnormal signal has been received, the process proceeds to step S63. In step S63, the control unit 112, 122, 142 switches the control mode from the first mode to the second mode and ends the process.

[0100] With reference to Fig. 18, an example will be described in which a shift operating device 50C is used as the preliminary braking operating device 150. Fig. 18 shows a braking operation process executed by the control unit 142 of the shift operating device 50C. The process shown in the flowchart of Fig. 18 is repeatedly executed at predetermined time intervals.

[0101] In step S71, the control unit 142 determines whether or not operation of the operating unit 146 of the shift operating device 50C, more specifically, operation of the shift-up switch 54A or the shift-down switch 54B, has been detected. If the control unit 142 determines in step S71 that operation of the operating unit 146 has not been detected, the process ends. If the control unit 142 determines in step S71 that operation of the operating unit 146 has been detected, the process proceeds to step S72.

[0102] In step S72, the control unit 142 determines whether the control mode is the first mode. If the control unit 142 determines in step S72 that the control mode is the first mode, the process proceeds to step S73. In step S73, the control unit 142 transmits an actuation signal to the electric transmission 40C and ends the process. Therefore, when the control mode is the first mode, the electric transmission 40C executes a gear shifting operation in response to receiving the actuation signal. The control unit 142 of the shift operation device 50C does not allow the actuation of the brake devices 40A, 40B in response to the operation of the shift operation device 50C.

[0103] In step S72, when the control unit 142 determines that the control mode is not the first mode but the second mode, the process proceeds to step S74. In step S74, the control unit 142 transmits an actuation signal to the braking devices 40A, 40B and ends the process. Therefore, when the control mode is the second mode, the braking devices 40A, 40B perform a braking operation in response to receiving the actuation signal. The electric transmission 40C does not perform a gear shifting operation.

[0104] As the preliminary braking operation device 150, one or more operation devices 50 other than the shift operation device 50C may be used instead of or in addition to the shift operation device 50C. For example, the operation device 50 includes at least one of the assist mode switching operation device 50D, the suspension mode switching operation device 50E, and the adjustable seatpost operation device 50F. In this case, the control unit 142 of each of the operation devices 50D, 50E, and 50F executes the process shown in the flowchart of FIG. 18, similar to the control unit 142 of the shift operation device 50C. In this case, the destination of the activation signal in step S73 is the activation device 40 corresponding to each of the operation devices 50D, 50E, and 50F.

[0105] With reference to Fig. 19, an example in which a crank 28 is used as the preliminary braking operation device 150 will be described. Fig. 19 shows a braking operation process executed by the control unit 122 of the electric assist drive unit 40D. The process shown in the flowchart of Fig. 19 is repeatedly executed at predetermined time intervals.

[0106] As shown in FIG. 19, in step S81, the control unit 122 determines whether or not the crank sensor 74 has detected reverse rotation of the crank 28. If the control unit 122 determines in step S81 that reverse rotation of the crank 28 has not been detected, the process ends. If the control unit 122 determines in step S81 that reverse rotation of the crank 28 has been detected, the process proceeds to step S82. In step S82, the control unit 122 determines whether or not the control mode is the first mode. If the control unit 122 determines in step S82 that the control mode is the first mode, the process ends. Therefore, when the control mode is the first mode, the control unit 122 of the electric assist drive unit 40D does not allow the brake devices 40A, 40B to operate in response to the reverse rotation of the crank 28.

[0107] When the control unit 122 determines in step S82 that the control mode is the second mode rather than the first mode, the process proceeds to step S83. In step S83, the control unit 122 transmits an actuation signal to the braking devices 40A, 40B, and ends the process. Therefore, when the control mode is the second mode, the braking devices 40A, 40B perform braking operations in response to receiving the actuation signal.

[0108] Regardless of whether the control mode is the first mode or the second mode, the control unit 122 of the electric assist drive unit 40D may send an activation signal to the braking devices 40A, 40B in response to detection of reverse rotation of the crank 28. In this case, the control units 112 of the braking devices 40A, 40B may not allow activation of the braking devices 40A, 40B in response to the activation signal when the control mode is the first mode.

[0109] <Modification> The description of each embodiment is an example of a form that the control system according to the present disclosure can take, and is not intended to limit the form. The control system according to the present disclosure can take, for example, a modified version of each embodiment shown below, or a form that combines at least two modified versions that are not mutually contradictory. In the following modified versions, parts that are common to the embodiments are given the same reference numerals as the embodiments, and their description is omitted.

[0110] In addition to the right brake operating device 50A and the left brake operating device 50B, one or more additional brake operating devices may be provided. For example, as shown in FIG. 20, the control system 80 of the first embodiment may include an additional right brake operating device 50G and an additional left brake operating device 50H in addition to the right brake operating device 50A and the left brake operating device 50B. The right brake operating device 50A and the additional right brake operating device 50G are disposed at different positions on the right side of the handlebar 24. The left brake operating device 50B and the additional left brake operating device 50H are disposed at different positions on the left side of the handlebar 24. The additional right brake operating device 50G and the additional left brake operating device 50H may have a brake lever or a brake switch. The right side brake operating device 50A and the additional right side brake operating device 50G may be configured to operate the front brake operating device 40A, and the left side brake operating device 50B and the additional left side brake operating device 50H may be configured to operate the rear brake operating device 40B.

[0111] The left and right brake operation devices 50A, 50B and the front and rear brake devices 40A, 40B may correspond to any combination. For example, each of the left and right brake operation devices 50A, 50B may be configured to operate both the front and rear brake devices 40A, 40B.

[0112] The first communication path P1, which is a wired communication path, may also be provided between the right-side brake operating device 50A and the left-side brake operating device 50B. The first communication path P1, which is a wired communication path, may also be provided between the front brake device 40A and the rear brake device 40B.

[0113] The second communication path P2, which is a wireless communication path, may also be provided between the right-side brake operating device 50A and the left-side brake operating device 50B. The second communication path P2, which is a wireless communication path, may also be provided between the front brake device 40A and the rear brake device 40B.

[0114] The right-side brake operating device 50A may be configured to monitor an abnormality in the left-side brake operating device 50B. The left-side brake operating device 50B may be configured to monitor an abnormality in the right-side brake operating device 50A.

[0115] The front braking device 40A may be configured to monitor an abnormality in the rear braking device 40B. The rear braking device 40B may be configured to monitor an abnormality in the front braking device 40A.

[0116] The electric assist drive unit 40D does not have to include the wireless communication unit 126.

[0117] The human-powered vehicle 10 does not necessarily have to include the electrically assisted drive unit 40D.

[0118] Each of the components such as the actuator 40 and the operating device 50 does not need to have a built-in battery.

[0119] When each of the components such as the actuation device 40 and the operation device 50 has a built-in battery, the human-powered vehicle 10 does not need to include the battery unit 38.

[0120] The wireless communication units 106, 116, 126 may be disposed outside the main body of each of the braking devices 40A, 40B, the brake operating devices 50A, 50B, and the electrically assisted drive unit 40D, and may be disposed separately from the main body. The wireless communication units 106, 116, 126 are connected to the main body by wires. The same applies when other components of the human-powered vehicle have wireless communication units.

[0121] If the first response signal cannot be received from the second communication control device 84, a message to that effect may be displayed on the display unit 138 of the cycle computer 42 to inform the user.

[0122] When the first communication control device 82 transmits the second actuation signal upon detecting the operation of the brake lever 52, the first communication control device 82 may transmit the first actuation signal first in response to the detection of the next operation of the brake lever 52, or may transmit only the second actuation signal without transmitting the first actuation signal. That is, in the flowchart of FIG. 10, once the process of step S4 has been executed, in response to the detection of the next operation of the brake lever 52, all of the processes from step S2 to step S4 may be executed, or only the process of step S4 may be executed. Similarly, in the flowchart of FIG. 12, once the process of step S24 has been executed, in response to the next reception of the first actuation signal from the brake operating devices 50A, 50B, all of the processes from step S22 to step S24 may be executed, or only the process of step S24 may be executed.

[0123] The first communication control device 82 may transmit both the first and second operating signals simultaneously or with a slight time lag. In this case, the second communication control device 84 transmits a first response signal in response to receiving the first operating signal, and transmits a second response signal in response to receiving the second operating signal. If the first response signal or the second response signal cannot be received, a notification to that effect may be displayed on the display unit 138 of the cycle computer 42, for example.

[0124] The term "at least one" as used herein means "one or more" of the desired options. As an example, the term "at least one" as used herein means "only one option" or "both of two options" if the number of options is two. As another example, the term "at least one" as used herein means "only one option" or "any combination of two or more options" if the number of options is three or more. [Explanation of symbols]

[0125] 10...human-powered vehicle, 12, 14...wheel, 28...crank, 40...actuating device, 40A, 40B...brake device, 40C...electric transmission, 40D...electrically assisted drive unit, 40E...suspension, 40F...adjustable seat post, 50...operation device, 50A, 50B...brake operation device, 52...brake lever, 80...control system, 82...first communication control device, 84...second communication control device, 86...third communication control device, 100...sensor, 104, 114, 124...wired communication unit, 106, 116, 126...wireless communication unit, 112, 122, 142...control unit, 136A...mode switching operation unit, 150...backup brake operation device, P1...first communication path, P2...second communication path.

Claims

1. 1. A control system for a human-powered vehicle, comprising: a braking device configured to brake the wheels; a brake operating device that is operated to activate the brake device; a first communication path configured to communicate a first actuation signal between the brake device and the brake operating device; a second communication path configured to communicate a second actuation signal between the brake device and the brake operating device, the second communication path being different from the first communication path; A first communication control device provided in the brake operating device; A second communication control device provided in the braking device, the first communication control device is configured to transmit the first actuation signal via the first communication path in response to an operation of the brake operating device; The second communication control device is configured to transmit a response signal over the first communication path in response to receiving the first actuation signal.

2. a third communication control device provided in at least one of the brake operating device and the first communication path, The control system of claim 1, wherein the third communication control device is configured to transmit the second activation signal to the second communication control device via the second communication path if the third communication control device cannot receive the response signal from the second communication control device after transmitting the first activation signal from the first communication control device.

3. 1. A control system for a human-powered vehicle, comprising: a braking device configured to brake the wheels; a brake operating device that is operated to activate the brake device; a first communication path configured to communicate a first actuation signal between the brake device and the brake operating device; a second communication path configured to communicate a second actuation signal between the brake device and the brake operating device, the second communication path being different from the first communication path; A first communication control device provided in the brake operation device; A second communication control device provided in the braking device; a third communication control device provided in at least one of the brake operating device and the first communication path, the first communication control device is configured to transmit the first actuation signal via the first communication path in response to an operation of the brake operating device; the second communication control device is configured to transmit a response signal in response to receiving the first activation signal; A control system, wherein the third communication control device is configured to transmit the second operation signal to the second communication control device via the second communication path if the third communication control device cannot receive the response signal from the second communication control device after transmitting the first operation signal from the first communication control device.

4. The third communication control device is provided in the brake operation device, 4. The control system according to claim 2, wherein the first communication control unit also serves as the third communication control unit.

5. 1. A control system for a human-powered vehicle, comprising: An actuator; An operating device that is operated to operate the actuation device; A first communication control device provided in the operation device; A second communication control device provided in the actuation device; a first communication path configured to communicate a first actuation signal between the first communication control device and the second communication control device; a third communication control device provided on at least one of the operation device and the first communication path; a second communication path configured to communicate a second operation signal between the second communication control device and the third communication control device, the second communication path being different from the first communication path; the first communication control device is configured to transmit the first actuation signal via the first communication path in response to an operation of the operating device; the second communication control device is configured to transmit a response signal in response to receiving the first activation signal; A control system, wherein the third communication control device is configured to transmit the second activation signal via the second communication path if it cannot receive the response signal from the second communication control device after transmitting the first activation signal from the first communication control device.

6. The control system of claim 5 , wherein the actuation device includes at least one of a braking device, an electronic transmission, an electronically assisted drive unit, a suspension, and an adjustable seat post.

7. 7. The control system according to claim 5, wherein the third communication control device is provided in the operation device, and the first communication control device also serves as the third communication control device.

8. The control system according to claim 2 , wherein the third communication control device is provided in a component located midway along the first communication path.

9. the second communication control device is configured to transmit a first response signal via the first communication path in response to receiving the first activation signal; 9. The control system of claim 1, wherein the second communication control unit is configured to transmit a second response signal over the second communication path in response to receiving the second actuation signal.

10. one of the first communication path and the second communication path is a wired communication path and the other is a wireless communication path; 9. A control system according to claim 2, wherein each of the first communication control device, the second communication control device, and the third communication control device includes a wired communication unit configured to perform wired communication and a wireless communication unit configured to perform wireless communication.

11. the first communication path is a wired communication path, and the second communication path is a wireless communication path, 9. A control system according to any one of claims 2 to 8, wherein each of the first communication control device, the second communication control device, and the third communication control device includes a wired communication unit configured to perform wired communication via the first communication path, and a wireless communication unit configured to perform wireless communication via the second communication path.

12. The control system according to claim 1 , wherein each of the first communication path and the second communication path is a wired communication path or a wireless communication path.

13. The control system according to claim 1 , wherein one of the first communication path and the second communication path is a wired communication path, and the other is a wireless communication path.

14. The control system according to claim 1 , wherein the first communication path is a wired communication path and the second communication path is a wireless communication path.

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