An object is to improve mountability of a brake system to a straddle-type vehicle while considering safety.

In a brake system, a mechanism portion includes a friction applying device which brakes a wheel of a straddle-type vehicle with a frictional force corresponding to a movement of an operator, an operator movement sensor which detects the movement of the operator, and an actuator which is unitized with the friction applying device. During normal braking, a control unit controls an output of the actuator based on a detection result of the operator movement sensor to change the frictional force applied to the wheel by the friction applying device. Further, when the actuator is in a non-energized state, the friction applying device applies a frictional force to the wheel.

A front wheel caliper bracket for supporting an axle is provided in a lower end portion of a front fork. A wheel speed sensor is mounted on the bracket. The wheel speed sensor includes a fixing section and a sensor section, and is mounted on a sensor mounting section of the bracket by a bolt. The sensor mounting section is integrally formed with a rotation regulating portion in a projecting fashion. When fastened by the bolt, a lateral part of the rotating wheel speed sensor comes into contact with the rotation regulating portion to regulate the rotation of the wheel speed sensor, so that the stress from the rotation regulating portion is not exerted directly on the sensor section.

Provided is an anti-lock braking system for a vehicle. The anti-lock braking system includes a hub having a hollow cavity which is configured to accommodate an axle, a device having a first part which is substantially static relative to the hub and a second part which may rotate relative to the hub when the first part and the second part are disengaged, and an actuator which is configured to control a transmission of a braking force from a frame of the vehicle to the hub by actuating the device, wherein one of the first part and the second part is configured to extend helically around the axle.

The disclosure provides an anti-lock brake device including an oil pressure tank, a valve, and a movable component. The oil pressure tank has an accommodation space, an oil inlet channel, and an oil outlet channel connected to the accommodation space. The valve is slidably located in the oil inlet channel and for sealing or opening an oil inlet of the oil inlet channel. The movable component is located in the accommodation space and has a connecting channel corresponding to the oil inlet and an oil outlet of the oil outlet channel. When the movable component is slid to a depressurized position, the movable component is moved away from the valve for sealing the oil inlet, a first volume is produced between the connecting channel and the oil inlet, and a second volume, smaller than the first volume, is removed from between the connecting channel and the oil outlet.

To provide a brake system for a saddled vehicle that exerts proper braking force control considering changes in the driver's posture during deceleration. A brake system for a saddled vehicle including a control device exerting automatic control over a brake fluid pressure of a front-wheel brake and that of a rear-wheel brake according to various information, and a throttle position detector for detecting a throttle position of a rotary-type throttle operating element mounted on a steering handlebar. When an operation on the throttle operating element is detected at start of automatic control over the front-wheel brake and the rear-wheel brake, if the throttle position is less than a predetermined threshold value, the control device maintains the automatic control, and if the throttle position is equal to or greater than the predetermined threshold value, the control device cancels the automatic control.

To provide a brake system for a saddled vehicle that ensures vehicle's stable behavior when a brake operating element is operated during automatic control. A brake system for a saddled vehicle includes: a control device exerting automatic control over a brake fluid pressure; and a front-wheel brake operating element and a rear-wheel brake operating element for a driver to manually operate a front-wheel brake and a rear-wheel brake. When an operation force is applied to at least one of the front-wheel brake operating element and the rear-wheel brake operating element while the front-wheel brake and the rear-wheel brake are under automatic control of the control device, if a brake fluid pressure corresponding to the operation force is less than a brake fluid pressure generated by the automatic control, the control device maintains the automatic control, and if a brake fluid pressure corresponding to the operation force is equal to or greater than a brake fluid pressure generated by the automatic control, the control device cancels the automatic control and generates the brake fluid pressure corresponding to the operation force.

To provide a brake system for a saddled vehicle that suppresses the speed at which the vehicle transitions to a front-dropping posture, thereby enhancing the driver's sense of security. A brake system for a saddled vehicle includes a control device exerting automatic control over a brake fluid pressure of a brake according to various information, and a pitch angular velocity detector for detecting a pitch angular velocity of the vehicle according to an output of a pitch angular velocity detection unit. When the pitch angular velocity becomes equal to or greater than a predetermined threshold value while the control device is gradually increasing the brake fluid pressure of the front-wheel brake by the automatic control, the control device reduces a degree of increase in the brake fluid pressure or maintains the brake fluid pressure at that time point.

A method for operating a motor vehicle having two wheels, each of which is associated with a parking brake. The parking brakes are controlled as a function of a friction between the respective wheel and the ground.

A braking system for vehicles comprising a pilot pump provided with a manual actuation means, the pilot pump being fluidically connected to a hydraulic actuator device in turn operatively connected to a braking device associated with a wheel of said vehicle, wherein the hydraulic actuator device delimits a first and a second actuation chamber fluidically separated by a movable septum along an axial direction X-X, the first actuation chamber containing fluid pressurized by the pilot pump, the second actuation chamber being filled with fluid under pressure and being provided with a delivery duct fluidically connected to said braking device. Advantageously, the hydraulic actuator device comprises a by-pass, offset axially with respect to said delivery duct and fluidically connected with the latter, the movable septum being connected to motor means in order to translate axially, independently of the braking action imposed through the manual actuation means of the pilot pump, the system comprising a processing unit and control operatively connected with the motor means and programmed so as to pass from a condition of standard operation or deactivation of the motor means, in which the movable septum connects the first actuation chamber with the by-pass and with the second actuation chamber, to a braking correction condition in which the motor means are activated to move the movable septum so that the first actuation chamber is fluidically separated from the by-pass and the second actuation chamber. In this way, the second actuation chamber, fluidically connected to the delivery duct, commands the actuation of the braking device, excluding the action imposed by the user through the pressurized fluid in the first actuation chamber.

A position of a center of gravity of a vehicle body is easily optimized. An ABS modulator is disposed in a vicinity of a pivot bracket, which is joined to a lower rear portion of a main frame, and to which a swing arm is swingably connected.