A brake control device and a brake system are configured to appropriately apply a braking force to a rotary body of a human-powered vehicle. The brake control device includes an electronic controller that controls a braking portion electrically driven to brake a rotary body rotating in accordance with traveling of a human-powered vehicle. The electronic controller controls the braking portion in accordance with an operation amount of an operating device and a state related to the human-powered vehicle.

A method for stopping a bicycle at intersection, applied in a bicycle system including a signal light command device, a signal controller, an electromagnet emitting device, and a bicycle having a magnet adsorption device. The method includes controlling, by the signal controller, the electromagnet emitting device to generate magnetic attraction force when a stoplight of the signal light command device is turned on; and attracting, by the electromagnet emitting device, the magnet adsorption device of the bicycle to decelerate or stop the bicycle. A bicycle system and a bicycle are also provided.

A method for stopping a bicycle at intersection, applied in a bicycle system including a signal light command device, a signal controller, an electromagnet emitting device, and a bicycle having a magnet adsorption device. The method includes controlling, by the signal controller, the electromagnet emitting device to generate magnetic attraction force when a stoplight of the signal light command device is turned on; and attracting, by the electromagnet emitting device, the magnet adsorption device of the bicycle to decelerate or stop the bicycle. A bicycle system and a bicycle are also provided.

A bicycle rear derailleur includes a movable member and a chain guide assembly rotatably connected to the movable member. The bicycle rear derailleur also includes a pivot member non-rotatably coupled to the chain guide assembly and having an outer annular surface, a biasing device configured to bias the chain guide assembly in a first rotational direction relative to the movable member, and a damper device disposed between the chain guide assembly and the movable member. The damper device is operable to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction relative to the movable member. The damper device includes a friction device that is radially inner relative to the biasing device. The friction device includes a friction member having at least one friction surface biased against and in frictional engagement with the pivot member.

A pressure modulator for an anti-lock braking system of a bicycle. The pressure modulator includes a cylinder, and a piston having a through opening for hydraulic fluid, the piston being situated inside the cylinder and subdividing the cylinder into a first accumulator chamber and a second accumulator chamber, the first and second accumulator chambers being connectable to each other via the through opening. The pressure modulator further includes a valve system, which includes a closing element and an actuating device for the closing element, the closing element being situated in the through opening, and the actuating device being situated at a bottom of the cylinder, and an actuator for moving the piston.

A pressure modulator for an anti-lock braking system of a bicycle. The pressure modulator includes a cylinder, and a piston having a through opening for hydraulic fluid, the piston being situated inside the cylinder and subdividing the cylinder into a first accumulator chamber and a second accumulator chamber, the first and second accumulator chambers being connectable to each other via the through opening. The pressure modulator further includes a valve system, which includes a closing element and an actuating device for the closing element, the closing element being situated in the through opening, and the actuating device being situated at a bottom of the cylinder, and an actuator for moving the piston.

A notification system notifies brake-related information related to braking of a rotation body of a human-powered vehicle. The notification system includes a notification unit that includes a notification device configured to notify a user of the brake-related information. The notification device is provided on at least one of a brake device braking the rotation body, an operation device operating the brake device, and a display device.

An electronic device is related to a human-powered vehicle operating device that includes an operating mechanism, which is for operating at least one of a human-powered vehicle transmission device and a human-powered vehicle braking device, and at least one operating member. The electronic device comprises a storage, an electronic controller, and a communication unit. The storage stores setting information related to an operation of the at least one operating member and to an output destination device. The electronic controller is configured to generate an output signal corresponding to the operation of the at least one operating member based on the setting information. The communication unit transmits the output signal to the output destination device that includes at least one of a game device, a training device, an audio device, and a video device.

An electronic device is related to a human-powered vehicle operating device that includes an operating mechanism, which is for operating at least one of a human-powered vehicle transmission device and a human-powered vehicle braking device, and at least one operating member. The electronic device comprises a storage, an electronic controller, and a communication unit. The storage stores setting information related to an operation of the at least one operating member and to an output destination device. The electronic controller is configured to generate an output signal corresponding to the operation of the at least one operating member based on the setting information. The communication unit transmits the output signal to the output destination device that includes at least one of a game device, a training device, an audio device, and a video device.

The disclosed method may include configuring one or more brakes based on a braking-related attribute expected at a geographic location being traversed by a personal mobility vehicle. By configuring the application of brakes of a personal mobility vehicle based on terrain, environmental conditions, and other geographic features, the system may reduce the risk of the vehicle skidding or tipping due to over-braking. In some embodiments, a rider may use a single brake lever to indicate a desire to brake and the system may make determinations about how to apply a combination of mechanical and electrical brakes to front and back wheels based at least in part on the location of the personal mobility vehicle. By configuring brake engagement based on a combination of controls and map data, the system may improve user experience and user safety, especially for inexperienced riders.