A braking system with redundant trailer communication is provided. In one embodiment, a braking control system for a tractor-trailer comprises a primary brake controller in a tractor configured to communicate with a trailer brake controller in a trailer via a first communication channel, and a redundant brake controller in the tractor configured to communicate with the trailer brake controller via a second communication channel. The primary brake controller is further configured to serve as a master brake controller for the trailer and communicate with an automated driving computer in the tractor. The redundant brake controller is further configured to take over as the master brake controller in response to determining that the primary brake controller can no longer serve as the master brake controller.

A hydraulic pressure control unit where a degree of freedom in connection to a bicycle is improved is provided. A braking system including such a hydraulic pressure control unit is also provided. A bicycle including such a braking system is also provided.

A hydraulic pressure control unit (110) of a braking system mounted on a bicycle and capable of executing an antilock braking control includes a base body (120), a coil casing (136) in which an inlet valve and an outlet valve are accommodated, and a fixing member (139). The fixing member (139) is joined to the coil casing (136) or the base body (120) in a state where a columnar space (155) with both ends opened is formed between a partial region of an outer surface of the coil casing (136) or the base body (120) and a partial region of an outer surface of the fixing member (139).

A brake system includes a driving part driven by electric power to brake a rotary body of a human-powered vehicle and an electronic controller configured to control the driving part. The electronic controller has a plurality of control modes including a first mode that drives the driving part in accordance with a user operation and a second mode that does not drive the driving part regardless of the user operation. The electronic controller is configured to switch the plurality of control modes based on setting information related to an input to the human-powered vehicle.

The present invention is to provide a brake hydraulic pressure control device and a brake hydraulic pressure control method capable of preventing a rear wheel from lifting. Also, the present invention is to provide a saddle-type vehicle including the brake hydraulic pressure control device.

According to the present invention, there is provided a brake hydraulic pressure control device of a saddle-type vehicle, which is configured to execute anti-lock brake control and determines the time for one opening of a hydraulic pressure adjusting valve when the pressure of a brake fluid in a wheel cylinder is increased while the hydraulic pressure adjusting valve is repeatedly opened and closed, in correspondence to the pressure of the brake fluid in a master cylinder and an input gradient, which is an increment per unit time of the amount of operation of an input unit of a brake.

The invention obtains a hydraulic brake system, installability of which in a bicycle is improved. The invention also obtains a bicycle that includes such a hydraulic brake system. The invention further obtains a method for controlling such a hydraulic brake system. A hydraulic brake system 100 includes a hydraulic pressure controller 100 and a power supply unit 150 of the hydraulic pressure controller 100, the hydraulic pressure controller 100 including: a base section that is formed with a channel, through which a brake fluid flows, therein; a valve that is attached to the base section and opens and closes the channel; and a control section that governs an opening/closing operation of the valve and controlling hydraulic pressure of the brake fluid that is supplied to a wheel braking section of the bicycle. The power supply unit 150 includes a generator 151 that generates electric power by traveling of a bicycle 200.

A brake fluid pressure control device for vehicles with bar handle which is configured to start a holding control of a fluid pressure of a wheel brake according to wheel deceleration calculated based on a wheel speed of the vehicle is provided. In the brake fluid pressure control device, the vehicle includes an acceleration sensor which is configured to detect acceleration in a front-rear direction of the vehicle, acceleration, detected by the acceleration sensor, which occurs in a rearward direction when the vehicle is decelerating is detected as a positive value, and the holding control is started when it is judged that the acceleration detected by the acceleration sensor is larger than or equal to a detection acceleration threshold value and the wheel deceleration is smaller than or equal to a wheel deceleration threshold value.

A straddled vehicle has a plurality of modes for engine brake controlling. The straddle vehicle includes a mode setter that selectively sets one of at least a normal mode and a first reduced mode that are included in the plurality of modes. An engine controller controls an electronic throttle valve and a fuel injector so that a torque of an internal combustion engine is equal to a target torque. When the torque of the internal combustion engine is less than zero while in the first reduced mode, an engine brake controller corrects the target torque by adding a first additive torque to the target torque. The first additive torque is set so as to be smaller as an amount of operation of an accelerator grip becomes larger so that an opening of the electronic throttle valve increases as the amount of operation of the accelerator grip increases.

A hydraulic pressure control unit disposed at a suitable place of a bicycle is provided. A braking system including such a hydraulic pressure control unit is also provided. A bicycle including such a braking system is also provided.

A hydraulic pressure control unit (110) of a braking system (100) mounted on a bicycle (200) and capable of executing an antilock braking control includes: an inlet valve (131) and an outlet valve (132) which are opened and closed when the antilock braking control is executed; and a base body (120) to which the inlet valve (131) and the outlet valve (132) are attached, wherein a mount part of the hydraulic pressure control unit (110) for mounting the hydraulic pressure control unit (110) to the bicycle (200) is joined to a front fork (15) of the bicycle (200).

Engine braking is stabilized so that a saddled vehicle can be decelerated smoothly In a saddled vehicle including an engine including an electronic throttle valve mechanism that drives an air intake throttle valve via an actuator, and a first control unit that controls the engine, the first control unit has an engine braking controller that controls the throttle valve so as to generate a force that offsets the engine braking of the engine when the vehicle is decelerated.

A method for preventing a forward flip-over or a flip-over about the vehicle transverse axis of a single-track motor vehicle, during a braking action of its front wheel. In the method, a lift-off indicator parameter is ascertained, which represents the flip-over hazard by a rear wheel at risk of lifting off or already having lifted off the ground surface, and the braking force at the front wheel is reduced as a function thereof to prevent a flip-over.