A brake device for a motor vehicle with two axles in which at least one axle has an electric traction motor for driving and braking at least one wheel arranged on an axle, and in which energy can be recovered by means of the traction motor during braking, each wheel having a wheel brake. The brake device includes a pressure supply having an electric motor-driven pump in the form of a piston-cylinder unit or a rotary pump, which can both build up pressure and reduce pressure, and which is part of a pressure supply device. An open-loop and closed-loop control device controls the traction motor and components of the pressure supply device such that a braking deceleration can be set by closed-loop control individually for each brake circuit, each axle or wheel brakes of an axle, with different braking torques at the respective axles or wheel brakes of an axle.

A vehicle control system includes a brake mechanism and a first power source. The brake mechanism includes: a hydraulic brake provided for a vehicle wheel to suppress rotation of the wheel in accordance with a hydraulic pressure; a hydraulic pressure supply device including a high-pressure source that supplies a high hydraulic pressure, and first and second electromagnetic valves, to supply the hydraulic pressure to the hydraulic brake by controlling the first electromagnetic valve using the hydraulic pressure; and a control device that performs drive assist control by controlling the hydraulic pressure supply device. The first power source supplies power to the brake mechanism. The control device supplies a current to a solenoid of the first electromagnetic valve while suspending supply of a current to a solenoid of the second electromagnetic valve when a voltage of the first power source is lower than a set voltage during the drive assist control.

A brake system includes a first and a second hydraulic brake assembly, a first and a second switch and a first electronic brake assembly. The first hydraulic brake assembly includes a first brake caliper and a first brake lever connected to each other. The second hydraulic brake assembly includes a second brake caliper and a second brake lever connected to each other. The first switch is activated by the first brake lever when the first brake lever is operated. The second switch is activated by the second brake lever when the second brake lever is operated. The first electronic brake assembly is connected to the second hydraulic brake assembly. The first electronic brake assembly controls an oil pressure applied to the second brake caliper according to whether the first switch and the second switch are activated.

To obtain a brake fluid pressure control device for a saddle-type vehicle capable of improving airtightness between a main body portion and a lid of a housing, suppressing a sealing material from leaking to the outside of the brake fluid pressure control device, and having a smaller size than the conventional one. A brake fluid pressure control device according to the invention includes a housing which covers a coil driving a hydraulic pressure adjusting valve for opening and closing a flow path for a brake fluid and a circuit board controlling energization of the coil, the housing includes a main body portion which is provided with an opening portion and a lid which covers the opening portion and is attached to the main body portion, the main body portion includes a groove portion which is formed on the outer peripheral side of the opening portion, the lid includes an insertion wall which is inserted into the groove portion, a space for storing a sealing material is formed between the insertion wall and an outer peripheral wall of the groove portion and between the insertion wall and an inner peripheral wall of the groove portion, and a length of the outer peripheral wall extending toward the lid is longer than a length of the inner peripheral wall extending toward the lid.

A pedal-assisted cargo bicycle, includes a front extension of the frame which rotatably supports a front fork shaft around an axis-spaced forward with respect to the rotation axis of the bicycle handlebar, and a luggage compartment container mounted on said front extension of the frame. The cycle has an ABS hydraulic actuator device interposed in the connection between a master hydraulic cylinder associated with the lever for actuating the front brake, and an actuator hydraulic cylinder of a brake caliper associated with the front wheel unit. The ABS actuator device and the electronic control unit associated therewith are mounted on a support plate which is in turn mounted on a side wall of a lower portion of the luggage compartment container, so as to be protected from impacts against the ground even in a condition of maximum lateral inclination of the bicycle.

A vehicle includes wheels, brakes to control speeds of the wheels, and a hydraulic fluid source in fluid communication with the brakes. The vehicle includes a computer storing instructions to determine that speeds of the wheels are zero and actuate the hydraulic fluid source to provide hydraulic fluid to a first set of one or more of the brakes at a first pressure sufficient to maintain the vehicle body at a present position and to provide hydraulic fluid at a volumetric rate to one or more of the brakes not in the first set, and, while providing hydraulic fluid at the volumetric rate to a brake not in the first set, detect second pressures of the brake not in the first set. The instructions include instructions to determine a volume-pressure curve for the brake not in the first set based on the volumetric rate and the second pressures.