In one embodiment, a solenoid valve for a vehicle braking system includes a magnet assembly having a winding support, a coil winding, a housing, and a cover disc. The solenoid value further includes a valve cartridge having a capsule, a valve insert, a valve seat, and an armature. The valve insert can be connected to the capsule, the armature can be guided within the capsule in an axially movable manner and has a closing element. The closing element and the valve seat can form a valve that can control a fluid flow through the valve cartridge. The coil winding can be wound on the winding support to form an electrical coil, which can be controlled using control signals applied to electrical connectors. The electric coil generates a magnetic force that can move the armature against a force of a return spring.

For traction control, different filters, i.e., a hydraulic-pressure-increase filter and a hydraulic-pressure-decrease filter, are provided for increasing and decreasing target pressure, respectively. The inhibiting effect that the hydraulic-pressure-increase filter exhibits with respect to target pressure changes is made less than the inhibiting effect that the hydraulic-pressure-decrease filter exhibits with respect to changes in the target pressure, and so the target pressure is increased quickly but decreased slowly. As such, even if the wheel-cylinder pressure decreases subsequent to the actual wheel-cylinder pressure having increased to follow the target pressure, the wheel-cylinder pressure decreases only gradually, reducing the amount of pressure increase needed to reach the target pressure when the wheel-cylinder pressure is next increased. The wheel-cylinder pressure can thus be increased sufficiently to reach the target pressure with a high degree of responsiveness, making it possible to prevent being unable to increase the wheel-cylinder pressure accurately due to low pressurization performance.

A valve rotor for a solenoid valve includes a base body and a ram that cooperates with a valve seat. A damping device is arranged between the ram and the base body. The damping device has a cavity that is configured to be filled with a damping medium and a choke opening through which the damping medium flows into or out of the cavity. The damping device damps a pulse that occurs when the ram hits the valve seat. A valve cartridge includes the valve rotor.

A valve cartridge for insertion into a valve block for a manifold valve for accommodating a valve in the valve cartridge includes at least one through opening for the passage of fluid flowing to the valve and a filter device for filtering the fluid. The valve cartridge includes a first part and a second part, which are interconnected in such a way that the through opening is formed by the first and second part, the filter device being arranged between the first part and the second part.

There is provided an electromagnetic valve capable of ensuring a sufficient press-fit holding power when the electromagnetic valve is constructed by securing together a plurality of members by press-fitting. The electromagnetic valve of the present invention has a coil generating a magnetic field when energized, a cylinder comprising a cylindrical member of a non-magnetic material disposed at the inner periphery of the coil, a core provided at one end of the cylinder, a valve element disposed in the cylinder movably in the axial direction of the cylinder so that one end of the valve element faces the core, the valve element having a valve part at the other end thereof, a female press-fitting member having a cylindrical portion fluid-tightly connected to the cylinder, and a male press-fitting member having a seat part separable from the valve element, the male press-fitting member being press-fitted to the inside of the cylindrical portion of the female press-fitting member. The male press-fitting member has a rigidity lower than that of the female press-fitting member.

A bistable solenoid valve for a hydraulic brake system has a guide sleeve in which an upper immovable pole core is fixedly arranged and a closing element is displaceably arranged. The closing element is forced into a valve seat during a closing movement and lifts off from the valve seat during an opening movement, and is fixedly connected to a magnet assembly. An actuation of the movement of the closing element is performed by the magnet assembly via a coil positioned around and substantially surrounding the guide sleeve. A lower immovable pole core is fixedly arranged in the guide sleeve and the magnet assembly is positioned between the lower and the upper pole core.

The present disclosure provides a braking method of a vehicle, comprising: a control start determination operation of determining whether traction control system (TCS) control is needed; a required pressure calculation operation of calculating required pressures, which are required for wheel brakes to brake a vehicle, of wheels when it is determined that the TCS control is needed; a control mode determination operation of determining whether the TCS control is performed in a single wheel control mode or multi-wheel control mode; and a hydraulic pressure supply operation of supplying hydraulic pressure to a low-pressure wheel brake through valve control and supplying hydraulic pressure to a high-pressure wheel brake through pressure control in the multi-wheel control mode and supplying hydraulic pressure to any one wheel brake through the valve control in the single wheel control mode in order for the wheel brakes to reach the required pressures.

According to at least one aspect, the present disclosure provides a braking device for a vehicle, the braking device comprising: an electronic control unit which controls a motor and a traction control valve and calculates a required pressure for braking a vehicle and a pressure in a main line, wherein the electronic control unit increases the pressure in the main line by applying a positive current to the motor when the required pressure is greater than the pressure in the main line and decreases the pressure in the main line by applying a negative current to the motor and opening the traction control valve when the required pressure is lower than or equal to the pressure in the main line.

Disclosed is a solenoid valve for controlling a flow rate of a flow path connecting a first port to a second port, the solenoid valve including: a valve housing installed in a modulator block; an armature disposed inside the valve housing and reciprocating in an axial direction thereof to adjust a flow rate of a working fluid; and a first elastic member having a damper part, which is inserted between the magnet core and the armature, and providing the armature with an elastic force in a direction opposed to a driving force of the magnet core.

Provided is a brake apparatus including: a solenoid valve provided on the flow path and including a coil to open or close a flow path; a main driving circuit electrically connected to the coil to allow or block a current flowing through the coil; a sub driving circuit electrically connected to the coil and connected in parallel with the main driving circuit to allow or block a current flowing through the coil; a main cut-off switch electrically connected to the main driving circuit; a sub cut-off switch electrically connected to the sub driving circuit; and a processor configured to control at least one of the main driving circuit and the sub driving circuit to drive the solenoid valve.