Abstract: A cutoff valve comprises a coil wound around an outer periphery of a bobbin, a cylinder in contact with a protruding portion formed in an inner side of the bobbin, and an armature disposed inside the cylinder and moved in a winding axis direction of the coil by energization of the coil.

Abstract: The present invention provides a hydraulic control apparatus and a brake system capable of preventing or cutting down an increase in a size around a master cylinder. One aspect of the present invention includes a first hydraulic unit, a second hydraulic unit, and a stroke simulator unit. The first hydraulic unit includes a first input port connected to a supply port of a master cylinder, a first connection fluid passage connected to the first input port, a first pump configured to discharge brake fluid to the first connection fluid passage, and a first output port connected to the first connection fluid passage. The second hydraulic unit includes a second input port connected to the first output port, a second connection fluid passage connected to the second input port, a second pump configured to discharge the brake fluid to the second connection fluid passage, and a second output port having one end side connected to the second connection fluid passage and the other end side connected to a wheel cylinder.

Abstract: A cutoff valve comprises a coil wound around an outer periphery of a bobbin, a cylinder in contact with a protruding portion formed in an inner side of the bobbin, and an armature disposed inside the cylinder and moved in a winding axis direction of the coil by energization of the coil.

Abstract: A guide ring of a pump portion is fixed in a cylinder containing hole in such a manner that a distal end of a first end portion thereof is positioned in a cam containing hole on an upper side with respect to an opening edge of the cylinder containing hole.

Abstract: Provided is a plunger pump where quietness can be ensured. A plunger pump includes a cylinder, a piston, a discharge valve, and a plug member. The plug member includes: a recessed portion formed on a circumferential wall of a discharge chamber opposing an outer periphery of the discharge valve in a radial direction; and a discharge passage disposed at a position different from the recessed portion, formed on the circumferential wall of the discharge chamber opposing the outer periphery of the discharge valve in the radial direction, and connecting the discharge chamber and the outside with each other.

Abstract: Provided is a braking device capable of increasing boost responsiveness of wheel cylinders. The braking device includes a second chamber from which a brake fluid is discharged by a movement of a piston caused by inflow of the brake fluid flowed out from a master cylinder to a first chamber through a brake operation by a driver, and a pump configured to discharge the brake fluid into an oil passage for supplying the brake fluid flowed out from the second chamber to a wheel cylinder.

Abstract: Provided is a hydraulic pressure control device capable of improving ease of layout. The hydraulic pressure control device includes a stroke simulator unit and a hydraulic pressure unit. The stroke simulator unit includes a stroke simulator, a simulator connection liquid passage, and a simulator connection port. The stroke simulator is independent of a master cylinder configured to generate a hydraulic pressure through a brake pedal operation, and is configured to generate a reaction force against the brake pedal operation. The simulator connection liquid passage has one end side connected to the stroke simulator, and an opposite end side. The simulator connection port is provided on the opposite end side of the simulator connection liquid passage. The stroke simulator unit is mounted to the hydraulic pressure unit. The hydraulic pressure unit includes a unit connection port and a liquid passage.

Abstract: A brake apparatus including a hydraulic brake mechanism, an electric brake mechanism, and first and second controllers. The hydraulic brake mechanism can apply a braking force by thrusting a braking member forward with use of hydraulic pressure to a wheel belonging to a first group among a plurality of wheels of the vehicle. The electric brake mechanism can apply a braking force by thrusting a braking member forward with use of an electric motor to a wheel belonging to a second group among the plurality of wheels. The first controller can control the hydraulic brake mechanism, and the second controller can control the electric brake mechanism. The first controller acquires or receives at least one of yaw rate information of the vehicle and acceleration information of the vehicle without intervention of the second controller. The second controller acquires or receives wheel speed information without intervention of the first controller.

Abstract: Provided is a master cylinder unit including a communication path that causes a master cylinder and a stroke simulator to communicate with each other. The stroke simulator includes a bottomed tube-shaped simulator piston and a simulator cylinder in which a simulator piston slides. The simulator piston is such that a bottom portion of the simulator cylinder and an opening portion of the simulator piston face each other. The communication path is open over an outer circumferential portion and an inner circumferential portion of the opening portion of the simulator piston, is connected to the bottom portion of the simulator cylinder, and is provided such that the communication path extends upward in a vertical direction from the bottom portion of the simulator cylinder as approaching to a pressure chamber.

Abstract: An object of the present invention is to provide a hydraulic control apparatus capable of layout flexibility. A hydraulics control apparatus includes a second unit (a hydraulic unit) and a first unit (a stroke simulator unit). The second unit includes a housing including a brake fluid passage therein, a positive pressure fluid passage and a back-pressure fluid passage (a unit connection fluid passage) each having one end side connected to the brake fluid passage, a positive pressure port and a back-pressure port (a unit connection port) provided on a surface of the housing and connected to the other end sides of the positive pressure fluid passage and the back-pressure fluid passage, a pump (a hydraulic source) provided inside the housing and configured to generate a hydraulic pressure in each of wheel cylinders of a vehicle via the brake fluid passage, and a motor attached to a surface of the housing and configured to actuate the pump. The first unit includes a stroke simulator.

Abstract: Provided is a plunger pump where quietness can be ensured. A plunger pump includes a cylinder, a piston, a discharge valve, and a plug member. The plug member includes: a recessed portion formed on a circumferential wall of a discharge chamber opposing an outer periphery of the discharge valve in a radial direction; and a discharge passage disposed at a position different from the recessed portion, formed on the circumferential wall of the discharge chamber opposing the outer periphery of the discharge valve in the radial direction, and connecting the discharge chamber and the outside with each other.

Abstract: A plunger pump having improved durability without leading to a reduction in productivity is provided. A pump apparatus includes a sliding portion provided between a stopper portion and an eccentric cam in a direction of an eccentric central axis and having a lower frictional coefficient between the sliding portion and the eccentric cam than a frictional coefficient between the stopper portion and the eccentric cam.

Abstract: Provided is a hydraulic control apparatus and a brake system capable of improving responsiveness in terms of increasing a pressure in a wheel cylinder. The hydraulic control apparatus includes a connection fluid passage connected to a wheel cylinder of a wheel, a first hydraulic source, and a second hydraulic source. The first hydraulic source includes a first discharge port connected to the connection fluid passage and a first intake port connected to a reservoir storing brake fluid therein. The second hydraulic source includes a second discharge port connected to the connection fluid passage and a second intake port connected to the reservoir.

Abstract: A brake apparatus is provided which has applicability to a wide range of vehicles. The brake apparatus includes a master cylinder provided in such a manner that a piston is axially operable in a master cylinder housing, and a stroke simulator including a reaction force piston axially operable by brake fluid introduced into a stroke simulator housing. The master cylinder housing is fixed to the stroke simulator housing. The stroke simulator housing is positioned between the master cylinder housing and a fixation piece structured to fix the stroke simulator housing to the vehicle. The fixation piece is spaced from the master cylinder housing.

Abstract: A brake apparatus includes a brake operation member, a state detection unit, a cylinder, a first portion, an operation rod, a stepped piston, first, second, and third seal members, first and second pressure chambers, a hydraulic source, and first and second oil passages. The brake apparatus also includes a fluid amount control unit. The fluid amount control unit is configured to control an amount of the brake fluid to be supplied to the first pressure chamber and the second pressure chamber. The fluid amount control unit is also configured to increase the amount of the brake fluid to be supplied to the second pressure chamber when the detected state is equal to a preset pressure increase request.

Abstract: An object of the present invention is to provide a brake apparatus that allows low-cost attachment of a stroke sensor that detects a stroke amount of a brake pedal. The brake apparatus is configured in such a manner that the stroke sensor that detects an amount of an axial stroke of a piston is disposed between one side surface of a master cylinder housing and one side surface of a valve housing, and an output of the stroke sensor is transmitted via a through-hole formed on the valve housing when being transmitted to a control unit attached to an opposite side surface-side of the valve housing.

Abstract: A brake apparatus improved in mountability on a vehicle is provided. The apparatus includes a master cylinder 4 that generates hydraulic brake pressure by a driver's brake operation, and a stroke simulator 5 that creates an artificial operation reaction force of a brake operation member when the brake fluid flown out of the master cylinder 4 enters the stroke simulator 5. The master cylinder 4 and the stroke simulator 5 are integrally arranged to overlap each other in a perpendicular direction (as viewed from the perpendicular direction) when installed in the vehicle.

Abstract: Provided are a brake apparatus, a brake system, and a master cylinder that can accurately detect a movement amount of a piston while reducing manufacturing cost. A brake apparatus includes a master cylinder housing including a cylinder therein, a piston provided inside the cylinder and movable in a direction of an axial line of the cylinder, a magnet provided, inside the cylinder, partially in a circumferential direction of the piston, which is a direction around the axial line, and configured to be displaced according to a movement of the piston, a detection portion provided on the master cylinder housing and configured to detect a movement amount of the piston, and a rotation restriction mechanism provided inside the cylinder and configured to restrict a movement of the magnet in the circumferential direction.

Abstract: Provided is a hydraulic pressure control device and a braking system capable of improving the productivity. The hydraulic pressure control device includes: a normally-closed electromagnetic valve, which includes a first valve part arranged so as to extend from a surface of a housing to an inside of the housing, and is configured to close an oil passage in the housing when a current is not supplied; and a normally-open electromagnetic valve, which includes a second valve part being arranged so as to extend from the surface of the housing to the inside of the housing, and including a common portion having a shape common to the first valve part, and is configured to open the oil passage in the housing when a current is not supplied.

Abstract: Provided is a hydraulic pressure control device and a braking system, which are capable of increasing a degree of freedom in layout of oil passages inside a housing. The hydraulic pressure control device includes a normally-closed type electromagnetic valve and a normally-open type electromagnetic valve. The normally-closed type electromagnetic valve includes a first valve part arranged so as to extend from a surface of the housing to an inside of the housing, and is configured to close an oil passage when a current is not supplied. The normally-open electromagnetic valve includes a second valve part being arranged so as to extend from the surface of the housing to the inside of the housing and having an axial length set to be equal to an axial length of the first valve part, and is configured to open the oil passage when a current is not supplied.