The invention relates to a pressure control valve having a control element that includes a valve component and a drive component. The valve component includes an orifice that, in a first position, may be closed by the control element, disconnecting a control chamber from a return chamber, such that a control pressure acts on a first control surface of the control element and in a second position, the orifice may be partially opened, so that the control and return chambers are fluidically connected to each other, such that the control pressure in the control chamber acts on a second control surface of the control element.

A solenoid valve system includes a valve body defining porting for a fluid flow through the valve body, and first and second solenoid valve components attached oppositely to the valve body. Each valve component includes an electromagnetically driven armature with a poppet that moves between a closed position and an open position. The porting defined by the valve body includes first side porting, second side porting, and common porting in fluid communication with an internal common chamber defined by the valve body. When a respective poppet is in the closed position, flow of fluid is blocked between the respective side porting and the common porting, and when the respective poppet is in the open position the poppet permits a flow of fluid between the respective side porting and the common porting through the common chamber.

According to at least one aspect, the present disclosure provides a solenoid valve comprising: an armature that moves upward or downward based on whether a current is supplied; a pusher that is in contact with the armature and linearly moves based on the movement of the armature; a spring that is compressed or expanded based on the linear movement; a plurality of input lines that receive brake fluid from a main master cylinder or a sub-master cylinder; an output line that supplies the brake fluid in a direction toward a wheel brake; and a stator that connects the input lines and the output line to provide a movement path, through which the brake fluid moves, and opens one input line and closes the other input lines among the plurality of input lines based on whether the current is supplied.

A valve assembly includes a valve housing having a first port, a second port, and a third port. A valve member within the valve housing is moveable therein to alter fluid communication between the first and second ports. The valve housing includes a first annular groove such that a first sealing ring is provided in the first annular groove, thereby sealing the first port from the second port when installed in a receiving bore. The valve housing also includes a second annular groove such that a second sealing ring is provided in the second annular groove, thereby sealing the second port from the third port in the receiving bore. The valve housing also includes a first anti-tip flange extending radially outward to a greater extent than the first annular groove and a second anti-tip flange extending radially outward to a greater extent than the second annular groove.

A servo valve assembly includes a housing defining a cylindrical cavity having a central axis, and a spool disposed in the cavity and co-axially aligned with the central axis. A pair of transition portions define opposing conical cavity surfaces each connect a respective one of first and second cylindrical cavity portions with a third cylindrical cavity portion. The spool comprises a pair of blocking members projecting radially, and each of the blocking members defines a conical blocking surface opposing a respective one of the conical cavity surfaces to define a fluid flow passage therebetween. A cone angle of each conical blocking surface relative to the central is equal to a cone angle of the opposing conical cavity surface relative to the central axis. The spool is moveable along the central axis to vary a flow area of the flow passages between the conical blocking surfaces and the conical cavity surfaces.

In a flow path switching valve, when a valve rod is shifted toward a first back pressure chamber, a first valve chamber is separated from the first back pressure chamber by a first valve element, and a second valve chamber is separated from an intermediate chamber by a second valve element. When the valve rod is shifted toward a second back pressure chamber, the first valve chamber is separated from the intermediate chamber by the first valve element, and the second valve chamber is separated from the second back pressure chamber by the second valve element. The valve rod has a pressure equalizing path through which the first back pressure chamber and the second back pressure chamber are connected.

A solenoid valve includes an inlet port, an outlet port, a seal member arranged in a channel of a fluid between the inlet port and the outlet port and having an opening, a valve body configured to open and close the opening of the seal member, a first spring configured to bias the valve body against the seal member, electromagnetic driving device, including an umbrella-shaped movable core configured to move the valve body and an electromagnetic coil configured to attract the umbrella-shaped movable core, for operating so as to open the opening of the seal member by attracting the umbrella-shaped movable core, and a second spring configured to exert a spring force in a direction opposite to the first spring, wherein the second spring is provided with rotation preventing device.

A valve assembly includes an inlet; an outlet; a valve seat between the inlet and the outlet; a valve member which moves between a first valve member position and a second valve member position; and a solenoid subassembly which allows the valve member to move between the first valve member position and the second valve member position. The solenoid subassembly includes a coil having a coil first end and a coil second end; an armature which reciprocates, based on polarity of an electrical current applied to the coil, between a first armature position which allows the valve member to move to the first valve member position and a second armature position which allows the valve member to move to the second valve member position; a first magnet which latches the armature in the first armature position; and a second magnet which latches the armature in the second armature position.

An air brake electric control valve includes a valve body, a force balance unit including a guide member, and an electromagnetic urge unit including a movable column operable to move between an urging position and a retracted position. When the movable column is at the urging position, the movable column pushes the air guide member such that a through hole of the air guide member is blocked. When the movable column is at the retracted position, a gap is formed between the movable column and the air guide member such that an intermediate section and a second passage of the valve body are in fluid communication via the through hole of the air guide member and the gap.

A pneumatic valve includes a housing, a first port, a second port, and a third port, each in communication with an interior of the housing, a coil assembly coupled to the housing, a plunger axially movable within the housing between a first position and a second position in response to electrical current being driven through the coil assembly, and a permanent magnet configured to retain the plunger in at least one of the first position or the second position.