A service brake device for vehicles is provided which permits rapid venting of a service brake pressure chamber. The service brake device includes at least one pneumatic service brake device with at least one piston and/or a diaphragm. The piston and/or diaphragm delimits the service brake pressure chamber on one side which can be supplied with compressed air from a brake line for applying the service brake and can be purged of compressed air for releasing the service brake, delimits a spring chamber on the other side which receives a spring that prestresses the piston and/or the diaphragm in the release position of the service brake. The pressure chamber includes a pressure connection communicating with the brake line. A quick air release valve between the brake line and the pressure chamber is arranged to connect the brake line to the pressure chamber when the pressure in the brake chamber is greater than in the pressure chamber, and to connect the pressure chamber to the spring chamber when the pressure in the pressure chamber is greater than the brake line pressure.

A pressure equalization valve arrangement for a rail brake system includes a hold valve and a membrane vent valve each having a control chamber. The hold valve and vent valve are piloted by a respective solenoid valve. A further solenoid valve is connected to the control chamber of the vent valve to allow the pressure across the vent valve membrane to be equalized with the brake cylinder pressure to decrease the pressure difference across the membrane. This results in an improved vent time.

To improve the degree of freedom with which an ABS hydraulic unit is attached to a handlebar, an ABS hydraulic unit includes a main housing that has at least part of a hydraulic circuit formed inside and is equipped with a mounting portion for mounting a brake lever and an attachment portion having at least part of a side surface of a through hole formed along a first direction, the through hole being for attaching the ABS hydraulic unit to a handlebar. The ABS hydraulic unit also includes a master cylinder that has a piston portion that moves in conjunction with the brake lever, the master cylinder being for increasing, with the movement of the piston portion, the pressure of brake fluid inside the hydraulic circuit. A piston insertion hole that extends in the moving direction of the piston portion and is for inserting the master cylinder is formed in the main housing along a second direction that intersects, but is not orthogonal to, the first direction.

A motor pump includes a base body, a pump, and a motor. The motor includes a tubular yoke having a bottom and an opening on a base body side, a bearing, a rotation shaft, a rotor, a commutator, a brush and a brush shaft. The bearing is fitted to an inside of a bearing hole of the base body. The brush holder is fitted to an inside of the yoke and engages with an outer peripheral surface of the bearing. The brush holder and the bearing are disposed so as to be spaced from the base body in an axial direction of the rotation shaft. The motor-side seal member is provided between the yoke and the base body. The base body constitutes a stopper that prevents the brush holder from being extracted from the yoke.

A method for switching over a solenoid valve having a movable valve body between a first position and a second position, wherein the method comprises at least the following method steps: a) adjusting a switching current to a pre-energization current intensity, in which the valve body remains in the present position, for a first time interval, and b) adjusting the switching current to a first switchover current intensity, which introduces a switchover movement of the valve body, for a second time interval.

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

A method for adjusting brake pressures of a motor vehicle. The method includes actuating, by a control unit, while taking into account determined dynamic state variables of wheels that are to be braked, a pressure control valve with an inlet valve for ventilating and with an outlet valve for venting a brake pressure line that is controlled by the pressure control valve. The control times of the outlet valve are determined depending on control of the inlet valve. In an external braking mode provided for a case where an external braking demand is received that is independent of a driver's braking demand, the control unit adjusts the brake pressure in the brake pressure line according to the external braking demand by determining control times of the outlet valve depending on control of the inlet valve.

A method for adjusting brake pressures of a motor vehicle. The method includes actuating, by a control unit, while taking into account determined dynamic state variables of wheels that are to be braked, a pressure control valve with an inlet valve for ventilating and with an outlet valve for venting a brake pressure line that is controlled by the pressure control valve. The control times of the outlet valve are determined depending on control of the inlet valve. In an external braking mode provided for a case where an external braking demand is received that is independent of a driver's braking demand, the control unit adjusts the brake pressure in the brake pressure line according to the external braking demand by determining control times of the outlet valve depending on control of the inlet valve.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve. In another embodiment, a second control pressure can be delivered through the second solenoid valve only when no first control pressure is delivered through the first solenoid valve.

The present invention obtains a brake hydraulic pressure control apparatus for a vehicle capable of suppressing an increase in manufacturing cost thereof when being configured to detect a rotation angle of a rotor.

The brake hydraulic pressure control apparatus according to the present invention is a brake hydraulic pressure control apparatus for a vehicle that includes: abase body that is formed with a channel of a brake fluid; a motor assembly that includes a rotor and a stator and drives a pump device provided in the channel; a control board of a controller that controls the motor assembly; and a housing that accommodates the control board, and that further includes: a permanent magnet that is attached to the motor assembly and rotates with the rotor; and a detection sensor that detects a magnetic field generated by the permanent magnet. The motor assembly is arranged in a space that is surrounded by the base body and the housing, the control board is arranged in a rotation axis direction of the rotor in a manner to oppose the permanent magnet, and the detection sensor is mounted on the control board.