An adjustable magnetic valve includes a magnet assembly and a guide sleeve in which a static component is arranged fixedly and a valve armature is arranged so as to be axially displaceable therein. The magnet assembly is pushed onto the static component and the guide sleeve. The static component forms an axial stop for the valve armature, which either forces a closing element into a valve seat or lifts the closing element from the valve seat depending on the direction in which the valve armature is driven. The valve armature and the static component are each formed as plastic components. The valve armature has a magnet receptacle that receives a permanent magnet, which is polarized in terms of its movement direction such that the permanent magnet is arranged within the magnet assembly regardless of the armature stroke.

Provided are an electromagnetic valve capable of suppressing an increase in size in an axial direction thereof, a fluid pressure control device, and a brake apparatus. A first filter member configured to filter a fluid is provided in a flow path between a valve seat and a second communication bore.

Examples relate to a hydraulic control unit that includes a pump for increasing a hydraulic pressure of a brake fluid. The hydraulic control unit includes a discharge channel from which the brake fluid pressurized by a pump is discharged, a pulsation reducing unit disposed in the middle of the discharge channel, and a controller controlling the pump and the pulsation reducing unit. The pulsation reducing unit includes a valve housing, a fixed core fixed to the valve housing, a movable core received in the valve housing in an axially movable manner, a closing member interlocking with the movable core and closing the discharge channel, a coil disposed in a manner to surround the valve housing and the fixed core, and an inflow chamber formed by the valve housing and one end surface of the movable core, into which the brake fluid flows, and whose volume can vary.

The present disclosure in some embodiments provides a brake apparatus for a vehicle, comprising: a reservoir configured to store a working fluid; a master cylinder connected to the reservoir; a hydraulic circuit connected to a wheel brake; a primary brake unit configured to supply a hydraulic pressure to the wheel brake through the hydraulic circuit; and a secondary brake unit configured to supply a hydraulic pressure to the wheel brake through the hydraulic circuit, wherein the hydraulic circuit comprises: a first hydraulic circuit coupled to the reservoir, the master cylinder, and the secondary brake unit; a second hydraulic circuit coupled to the reservoir and the primary brake unit; and a third hydraulic circuit coupled to the primary brake unit, the secondary brake unit, and the wheel brake.

A hydraulic brake system is configured such that a pressure of a working fluid from a high-pressure-source device is adjusted by electromagnetic pressure-increase and pressure-decrease linear valves and such that a brake device generates a braking force having a magnitude that depends on the pressure adjusted by the linear valves, wherein the following controls are selectively executable, as a control of the energizing currents supplied to the linear valves, a feedback control based on a difference between an actual braking-force index and a target braking-force index; and a feedforward control based on the target braking-force index executed by placing each valve in a valve equilibrium state, wherein, in the feedforward control, an energizing current is supplied to at least one of the two linear valves, the energizing current being larger than that according to a preset relationship between a braking-force index and an energizing current in the valve equilibrium state.

The invention provides a method of operating a brake system, including: transmitting a valve operating command to an inlet valve an outlet valve calculating a valve operating time of each of the inlet valve and the outlet valve based on a difference in pressure between both ends of each of the inlet valve and the outlet valve; performing the linear or On-Off control for increasing pressure and calculating the quantity of brake oil passing through the inlet valve and, the ON-OFF control for decreasing pressure and calculating the quantity of brake oil passing through the outlet valve; and calculating hydraulic pressure in the wheel brake cylinder based on the quantity of brake oil passing through the inlet valve and the quantity of brake oil passing through the outlet valve.