Abstract: When a plunger moves toward a side of a valve seat, an end face of a sealing member on a space side is separated from a surface of a seal housing groove, whereby a portion between a communication passage formed on an inner peripheral side of the sealing member is communicated with the space. At this time, an end face of the sealing member on a side of a damper chamber contacts the surface of the seal housing groove. However, since a part of a communication groove is communicated with the communication passage, the damper chamber is communicated with the communication passage through the communication groove. Accordingly, since the damper chamber is communicated with the space through the communication passage, a damping effect is not exerted.

Abstract: A normally closed solenoid-operated valve is composed of a stationary element provided at one end of a stationary sleeve, a movable element slidably inserted in the sleeve to face the stationary element and provided at an external surface thereof with a communication groove which axially extends between the opposite ends thereof for permitting the flow of the operating fluid, and an electromagnetic coil for exciting the stationary element and the movable element. A damper chamber is defined by an annular shim provided between the lower end surface of the stationary element and the top surface of the movable element. When the damper chamber is closed by the lower end surface of the stationary element and the top surface of the movable element, a dent groove makes the damper chamber communicate with the communication groove.

Abstract: A pressure relief valve has a valve element that is biased by a spring into a closed position. A pressure being controlled is applied to the valve element to counter the force of the spring. When the pressure applied to the valve element exceeds the force of the spring the pressure relief opens, otherwise the valve closes. The pressure is applied through a damping orifice which controls the rate at which the applied pressure can increase and decrease thus delaying the response of the pressure relief valve to pressure changes in both directions. The relative size relationship between the inlet and outlet can be varied to define the pressure-flow characteristic of the pressure relief valve.

Abstract: A solenoid operated spool valve has a dampening reservoir formed at one end of the spool and which is ported for immersion in a fluid sump. The reservoir port is oriented vertically above the spool and a cap with an offset port is received over the reservoir port to baffle fluid flow from the reservoir and prevent the reservoir from draining when the port is fluid starved in the sump.

Abstract: An apparatus and method for controlling a limited slip differential uses a solenoid operated valve having an armature attached a differential case of the differential for rotation therewith, and an actuating coil operatively attached to a non-rotating differential housing, for modulating pressure in a hydraulically actuated limited slip device of the limited slip differential. The actuating coil is mounted on a non-rotating plenum, sealed to the differential case with low pressure dynamic seals.

Abstract: In a method for a safety valve plus such a safety valve, the safety valve has the form of a valve body axially displaceable in a cavity with an inlet on either side of which are arranged outlets, whereby liquid and/or gas flow takes place from the inlet and past the valve body via a flow path to the outlets. On the valve body side, the flow path is provided with a structure that raises the friction in relation to the liquid and/or gas flow between the inlet and outlets.

Abstract: A water supply shut off system includes a water pressure delay device which delays the transmission of any apparent change in water pressure between the input and the output side of the valve to the control input of the valve. This delay allows the input and output pressures to have a chance to generally equalize without falsely tripping the device. The water supply shut off system can also include a thermal expansion/contraction device that allows thermal expansion and contraction of a fluid medium, such as water, when the shut off device is used with a device to be protected such as a hot water heater.

Abstract: A hydraulic pressure regulating valve for regulating a pressure in an automatic transmission of a motor vehicle, comprising a magnetic part which includes an electrically controllable coil, a coil core and a movable armature, a valve flange which is anchored on the magnetic part and has pressure medium guiding passages, a piston controlling a pressure in a passage connected to a consumer, the piston being loaded with the armature and controlling pressure medium connections between the passages, a diaphragm element which seals the valve flange relative to the magnetic part, a return passage, the diaphragm element having at least one pressure chamber which is hydraulically connected with the return passage, and a throttling device formed so that the pressure chamber is connected with the return passage through the throttling device.

Abstract: A solenoid valve for controlling a fuel injector of an internal combustion engine, including an electromagnet, a movable armature featuring an armature plate and an armature pin, as well as a control valve member, which is moved with the armature and cooperates with a valve seat, for opening and closing a fuel discharge passage of a control pressure chamber of the fuel injector, the armature plate being supported on the armature pin, so that it is slidably movable in the closing direction of the control valve member under the action of its inertial mass, against the elastic force of a return spring that acts upon the armature plate; and including a hydraulic damping device which permits damping of a post-oscillation of the armature plate during its dynamic sliding on the armature pin.

Abstract: A valve device is disclosed for controlling the delivery of gas from a pressurised source, suitable for use in a pneumatic ejector in sorting apparatus. The device comprises a housing defining a valve element chamber with an input for connection to a source of pressurised gas. A body in which at least one output duct is formed, has an end face in the chamber with a valve seat thereon surrounding the output duct or ducts. A valve element overlays the valve seat, and means are provided for moving the element between a closed position in engagement with the valve seat and an open position spaced from the valve seat. Additional abutment surfaces can be provided for engagement with the valve element on closure. At least one pocket is formed in one of the juxtaposed body end face and the valve element, which pocket forms a cushion of gas as the element moves towards its closed position. The pocket or pockets or additional pocket or pockets can be formed on one or more abutment surfaces spaced from the valve seat.

Abstract: A fuel injector, such as a fuel injector for fuel injection systems in internal combustion engines, includes a valve needle, the valve-closure member of which cooperates with a valve seat surface to form a sealing seat, and includes an armature engaging with the valve needle, the armature being arranged on the valve needle in an axially movable manner and being damped by a damping element including an elastomer. A ring space is formed between damping element and the valve needle, which is filled with fuel, the ring space being in contact with a throttle gap.

Abstract: A solenoid valve includes a movable member disposed in a sleeve for moving in an axial direction, a valve mechanism portion opening and closing in accordance with axial movement of the movable member to establish and interrupt fluid communication, a valve chamber exposed to an end surface of the movable member at the valve mechanism portion side and the valve mechanism portion, and a damper chamber exposed to the other end surface of the movable member axially opposite to the end surface at the valve mechanism portion side. The movable member is provided with a throttling portion for establishing fluid communication between the damper chamber and the valve chamber to introduce operational fluid from the damper chamber to the valve chamber. The throttling portion is unitary formed on a sliding surface portion of the movable member.

Abstract: A fuel supply system has a pump, a common rail, and injectors. Pressurized fuel is stored in the common rail. The common rail distributes the fuel to the injectors. A liquid fuel and a liquefied gas fuel such as dimethyl ether and a liquefied petroleum gas may be used as a fuel. In each injector, a valve element is actuated directly by an electromagnetic actuator. The injector has a low pressure chamber for decreasing a biasing force which acts on the valve element in a valve closing direction. The valve element can be divided for replacement. The injector has means for suppressing the bounce of the valve element. A hydraulic unit which utilizes the fuel suppresses the bounce of the valve element. The fuel supply system is connected to a refrigerating cycle. The fuel leaking from the fuel supply system is cooled and again liquefied by the refrigerating cycle.

Abstract: A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the first and the second flow passages. The valve has first and second control edges that are relatively spaced axially and radially such that the valve includes a radially extending surface between the first and second control edges. First and second restrictions are formed between the first and second control edges and the valve body, respectively. The first and second restrictions form a intermediate pressure region such that when the first and second flow passages are at different fluid pressures with fluid flowing past the valve, the intermediate region acts on the radially extending surface of the valve.

Abstract: To generate the effective damping relative to the change of fuel pressure when a needle valve is closed and to decrease the generation of after-dripping right after injection (spray), a rubber ring is provided between a core and a sleeve adapted to seal the fuel.

Abstract: The present invention relates to a solenoid valve (2) for controlling an injection valve (1) of an internal combustion engine, including an electromagnet (34), a movable armature (29), a control valve member (25,26) moved with the armature (29) and cooperating with a valve seat (24) for opening and closing a fuel discharge channel (17) of a control pressure chamber (14) of the injection valve, and a sliding piece (40) guiding the armature (29), which is positioned together with the armature (29) and the control valve member (25,26) in an armature chamber (51,52).

Abstract: There is provided a fuel injection valve in which an operation sound at the time of an operation of the fuel injection valve is lowered, and durability of parts is improved. A flat surface 4a of a valve body 4 is provided at a lower surface side of a shoulder portion 3a provided at a needle valve 3, and when the needle valve 3 moves in a valve closing direction, a portion B in which fuel is confined is compressed at a place between a lower surface of the shoulder portion 3a and the flat surface 4a, so that a damping effect of fluid is obtained and an operation sound is lowered.

Abstract: A magnet valve according to the related art has a sealing and damping device with an elastic region on which, during operation, a force acts due to different existing pressures that must also be overcome when the armature plate is moved.

Abstract: The invention relates to a pressure control valve (1) comprising a control piston (3) which is able to slide in a valve hole (4). Under the effect of an energy accumulator (5) said piston in one direction of displacement connects a pump connection (23) with a consumer connection (24) and in the other direction of displacement connects the consumer connection (24) with a tank connection (21) such that the pump connection (23) is closed off. The aim of the invention is to provide a pressure control valve which functions reliably and in a stable manner even in case of elevated control dynamics. To this end, independently of the direction of displacement of the control piston (3) a minimum volume flow present between the piston and the valve hole (4) dampens the displacement of the control piston (3).

Abstract: Proportional variable force solenoid valve for controlling the pressure of a fluid in a fluid control system comprises a solenoid housing having therein a solenoid coil, an armature movable in response to electrical current applied to the solenoid coil, and a biasing spring for biasing the armature in a direction to establish a valve fluid pressure response to solenoid coil current. An inner armature end cooperates with or engages a damping member residing in a fluid damping chamber to reduce non-linear valve responses resulting from pressure oscillations in the fluid control system.

Abstract: The invention relates to a fuel injection device for internal combustion engines. A high-pressure reservoir (common rail) can be made to communicate with an injection nozzle via a 3/2-way valve having has a control valve member which connects a supply line to a high-pressure line or to a relief line discharging into a tank. On its end regions, opposite the stops, the control valve member is provided with elements 7, 21; 6, 22 that damp the stroke of the control valve member.

Abstract: A device for controlling movement of a valve comprising first and second chambers having a fluid; passage means communicating with said first and second chambers for displacement of said fluid between said chambers through said passageway upon movement of said valve.

Abstract: A valve of the present invention has housing and a piston member. The piston member is housed in the housing so that it moves between first and positions. The housing includes a piston chamber for guiding the piston member between first and second positions while keeping a sealing engagement with the piston chamber. First and second chambers are positioned adjacent to opposite ends of the piston member so that volumes of first and second chambers are changed depending upon a movement of the piston member. First and second ports are connected when the piston member takes the first position but disconnected when the piston member takes the second position. Third port is connected with the first and second chambers but disconnected from the first and second ports when the piston member takes the first position but connected with the second port when the piston member takes the second position. A partition is defined between the first and second chambers.

Abstract: Proportional variable force solenoid valve for controlling pressure of a fluid in a fluid control system comprises a solenoid housing having therein a solenoid coil, an armature movable in response to electrical current applied to the solenoid coil, and a biasing spring for biasing the armature in a direction to establish a valve fluid pressure response to solenoid coil current. An inner armature end cooperates with or engages a damping member residing in a fluid damping chamber to reduce non-linear valve responses resulting from pressure oscillations in the fluid control system.

Abstract: A valve that influences flow through a fluid connection includes a valve member that executes a motion in which the distance between a valve seat surface and the valve member varies. The valve member is in operative engagement with a damping arrangement that counteracts its motion.

Abstract: A priority type dividing valve includes a housing, a spool slidably situated inside the housing and having a damper orifice, and a damper chamber formed between the spool and the housing for providing a resistance to the movement of the spool. The damper orifice is changeable and includes a small hole and notches, by which the damping effect is changed. At the time of a steering operation, the notches do not operate to increase the damping effect to thereby provide the sufficient holding force to suppress the vibration. When the spool is moved, the notches are actuated to reduce the damping effect to reduce the dragging resistance. Thus, the quick response is obtained.

Abstract: A solenoid valve comprising a magnet armature which is embodied as having multiple parts and has an armature disk and an armature bolt. The magnet armature is guided in a slider. A damping device is provided in order to prevent post-pulse oscillation of the armature after a closing of the solenoid valve. The required short switching times of the solenoid valve can be exactly maintained with a device of this kind. The solenoid valve is designated for use in injection systems with a common rail.

Abstract: In order to obtain great damper effects with a comparatively simple structure and fully control a hunting phenomenon, a pilot valve comprises push rods attached to a valve body, spools attached to spools holes of the valve body, spring bearing members provided in spring chambers of the valve body, first spring members provided between the valve body and the spring bearing members, second spring members provided between the spring bearing members and the spools, and an operation level for pressing the push rods. A fluid chamber is provided on an outside of one of ends of each of the spool holes. The fluid chamber communicates with a drain passage through a throttle passage having a throttle portion.

Abstract: The present invention relates to a fluid actuating valve, wherein the valve body (1) comprises a longitudinal tubular body (11) and a transversal cylinder body (12), the longitudinal tubular body (11) defines a longitudinal fluid passage (113), and the transversal cylinder body (12) defines a valve chamber (121), a transversal well (114) is disposed in the middle of the longitudinal tubular body (11), and the upper surface (116) of the transversal well (114) is served as a valve seat. A valve core assembly (3) is provided in the transversal well (114), which engages with the inner wall of the well and the valve seat and is lifted by the pressure fluid coming from the valve inlet to open the valve. A pressure-releasing hole (1111) is provided at the outlet side of the longitudinal tubular body (11) to connect the valve chamber (121) with the longitudinal fluid passage (113) to the outlet side.

Abstract: The invention pertains to a regulator for regulating a medium flow to at least one hydrostatic or aerostatic pocket of a bearing, a nut for threaded spindles or a guidance from a medium supply, with pressure chambers that are separated by a variable flow resistance control element that can be moved against the force of a spring element. A first pressure chamber is directly connected to the medium supply, a second pressure chamber that is charged with a lower pressure level is connected to the medium supply via a first flow resistance, and a third pressure chamber is charged with a third pressure level that corresponds to the pressure in the hydrostatic or aerostatic pocket.

Abstract: A valve includes a device for shutting off a valve interior. The shutoff device is positioned by a piston which is guided in a cylinder and forms a first chamber and a second chamber in the cylinder. The second chamber communicates with the valve interior through a throttle path, so that the shutoff device is movable in a damped manner in both closing and opening directions.

Abstract: An apparatus is described for the intermediate storage and control or release of a predeterminable quantity of water, wherein the predeterminable quantity of water is replenished, each time it has been released, from a supply main for the intermediate storage via an automatically acting supply valve arrangement. An elongate and substantially tubular container integratable into a wall construction is provided for the intermediate storage. This container is surrounded at least extensively by insulating material and is equipped at the outlet side with a valve which can be triggered to release the predeterminable quantity of water by means of an actuating element which can be installed at the container or at freely selectable distances from the container.

Abstract: A solenoid valve including a magnet armature having an armature disk and an armature bolt that is guided in a sliding part. In order to prevent a postoscillation of the armature disk after a closing of the solenoid valve, a damping device is provided on the magnet armature. With a device of this kind, a required short switching time of the solenoid valve can be precisely maintained. The solenoid valve (30) is designated for use in fuel injection systems with a common rail.

Abstract: A fuel pump or injector has a control valve with a piston valve body axially movable over a motion displacement interval defined by first and second sub-intervals. A first control valve spring causes the piston valve body to be biased toward the unactuated position whenever the piston valve body is in the first sub-interval. A second control valve spring causes the piston valve body to be biased into damped engagement with the valve stop whenever the piston valve body is in the second sub-interval.

Abstract: A fuel admission valve for metering gas without using a mass flow sensor. The valve uses a flow control element and nozzle, an actuator, a fuel supply pressure sensor, a fuel supply temperature sensor, a flow control element position sensor, and a flow control circuit to meter gas in sonic flow with insensitivity to the discharge pressure.

Abstract: Proportional variable force solenoid valve for controlling the pressure of a fluid in a fluid control system comprises a solenoid housing having therein a solenoid coil, an armature movable in response to electrical current applied to the solenoid coil, and a biasing spring for biasing the armature in a direction to establish a valve fluid pressure response to solenoid coil current. An inner armature end cooperates with or engages a damping member residing in a fluid damping chamber to reduce non-linear valve responses resulting from pressure oscillations in the fluid control system.

Abstract: A fuel pump for a vehicular diesel fuel pump member having a control valve assembly which includes a housing having a control valve chamber, and an actuatable control valve disposed in the control valve chamber. The control valve includes a piston valve body axially movable over a motion displacement interval between first and second positions. The motion displacement interval is defined by first and second sub-intervals bounded by the first and second positions, respectively. The control valve assembly further includes means for actuating the control valve. A valve stop is disposed in the housing adjacent the control valve chamber, and a piston valve body seat contacts the valve stop whenever the piston valve body is in the second position. The piston valve body seat contacts a pump body seating surface whenever the piston valve body is in the first position.

Abstract: A safety valve of the type that includes a sleeve (1) with a high pressure port (11) and a low pressure port (12); a valve seat (2) and a poppet (3), both slidably inserted in the sleeve and adapted to be brought together to provide a valve interface that is capable of establishing and blocking a fluid communication between the high pressure port and the low pressure port; and a spring (7) adapted to force the poppet against the valve seat, wherein a difference in force between a fluid pressurized in the high pressure port acting on a pressure receiving surface of the poppet and the spring acting against said pressurized fluid urges the poppet to open the valve interface, thereby relieving the high pressure port by a portion of the pressurized fluid admitted out thereof into the low pressure port.

Abstract: A proportional pressure control solenoid valve includes a valve spool with dual feedback pins slidable relative to the spool within a common bore of the spool as the spool moves. The feedback pins have unequal cross sectional areas defining an operative feedback area and enabling minimization of the valve's size in a cost efficient manner. To control output pressure as a function of control current, an electro-magnetically generated force initiates modulation of the valve with assistance from a hydraulic feedback force and in opposition to the force of modulating spring.

Abstract: A control valve, preferably for use with a fuel injector, includes a valve body defining a solenoid cavity, an inlet passage, an outlet passage and a metering passage extending between the solenoid cavity and the outlet passage. A solenoid is mounted in the solenoid cavity. A valve member has one end attached to the solenoid and is positioned to reciprocate in the valve body between an open position in which the inlet passage is opened to the outlet passage and a closed position in which the inlet passage is closed to the outlet passage. The inlet passage is in fluid communication with the solenoid cavity via the metering passage when the valve member is in its open position. Appropriate sizing of the metering passage can prevent secondary injections by providing adequate pressure relief to the solenoid cavity while also substantially damping any pressure waves that may travel to the solenoid cavity through the metering passage.

Abstract: A variable force solenoid operated pressure control valve of the type having a force balanced spool moveably controlled energization of the solenoid for modulating the discharge pressure of the valve at its control outlet when the valve is supplied at its inlet with fluid of a supply pressure. The spool is moved to bleed fluid through an exhaust port to a sump for controlling the pressure supplied to the control outlet. The spool has a dashpot and piston in one end for providing hydraulic dampening of spool oscillations. In one embodiment a cylindrical piston is used and in an alternate arrangement a ball is employed in the dashpot.

Abstract: An overload preventive device is capable of preventing elevation of preload pressure due to sticking action or break-through load of a hydraulic cylinder of a press machine. A delay valve for opening when the internal pressure of the load detecting circuit is lower than the minimum pressure to be maintained continuously over a specified time is interposed between a hydraulic pump for supplying pressurized oil of a specified pressure to a load detecting circuit.

Abstract: The invention relates to a pressure retaining valve including a housing which has a housing inlet passage and a housing outlet passage which can be connected to the housing inlet passage, a valve piston which is movable in the housing and has a valve shaft, a valve seat associated with the valve piston, whereby the valve piston is biased by a spring in the direction towards the valve seat and, in the closed position, seals the connection between the housing inlet passage and the housing outlet passage, and an isolating membrane which is clamped in the housing and separates the spring and the valve piston.

Abstract: A fluid flow device has a body which includes an inlet and an outlet with a valve seat therebetween. A valve stem having a valve member thereon is mounted in the body, and the valve member is operably connected to a diaphragm which separates a region within the body into a pair of separate pressure chambers. A fluid passage is formed in the body communicating one pressure chamber with upstream pressure in the inlet, while the other pressure chamber communicates with downstream pressure in the outlet. A pressure differential between the chambers will normally hold the valve member in an open position against the action of a biasing means, until the pressure differential reaches a predetermined amount, whereby the valve member is slowly closed until fluid flow through the device is stopped.

Abstract: A sealing element is fitted between the outside periphery of the magnet armature and the inside periphery of the valve housing and, parallel to the sealing element, an orifice is fitted in the armature, thereby establishing a permanent pressure fluid connection between the pressure fluid chamber disposed inside the magnet armature and the pressure fluid chamber disposed outside the armature.

Abstract: A regulator for maintaining a constant partial vacuum in a region, such as in a piece of process equipment or a fume hood. The regulator includes a path, through which fluid passes from the region to the vacuum source, and a movably mounted piston. The piston is disposed in the path so that the piston may constrict the path at a constriction point. Fluid in the path upstream of the constriction point exerts a pressure on the frontal face of the piston that tends widen the path at the constriction point. The piston is mounted so that the weight of the piston exerts a force on the piston in a direction that tends to widen the path at the constriction point. A force is exerted on the piston, preferably by a spring under compression, in a direction that tends to narrow the path at the constriction point. A buffering gas, introduced to the area between the piston's skirt and the piston mounting structure, may be used to keep noxious fumes from backing up into the environment and/or to provide an efficient bearing.

Abstract: [The aim is to] A solenoid valve which achieves a setting of a reduced flow area which is active after a closed position of the valve is disclosed. The solenoid valve has a seat valve in a valve chamber. A magnet armature for actuating the seat valve is provided on its end face remote from the seat valve with an axially expandable hollow part whose interior, acting as a control chamber, is connected to a valve sub chamber through a pressure fluid channel. A [D]dynamic pressure is generated in the partly open position of the seat valve in the valve subchamber and is capable through expansion of the hollow part in the control chamber of causing a force which acts on the magnet armature against the force of a resetting spring and on the basis of which the seat valve maintains its partly open position. The valve can be used in slip-controlled hydraulic brake systems of motor vehicles.

Abstract: A solenoid operated valve having a solenoid winding mounted on a valve housing formed with a valve chamber, an end closed sleeve concentrically assembled with the solenoid winding, a stationary element disposed within the end closed sleeve and mounted on the valve housing together with the end closed sleeve to form a fluid chamber in a closed end portion of the sleeve, the fluid chamber being communicated with the valve chamber through an axial bore of the stationary element, a movable element disposed within the fluid chamber to be moved toward the stationary element against a return spring loaded thereto when the solenoid winding is activated, a movable valve rod engaged at one end thereof with the movable element for movement therewith and extending into the valve chamber through the axial bore of the stationary element, a valve body disposed within the valve chamber to be moved by the valve rod, and a valve seat mounted within the valve chamber and located between an inlet passage and an outlet passage to

Abstract: An electromagnetically operated proportional valve, in particular a pressure regulating valve for automatic transmission of motor vehicles has a magnet housing, a magnet coil and stationary flux guiding elements received in the magnet housing, a magnet armature, a valve member with which the magnet armature cooperates, stationary structural elements forming at least one auxiliary air gap and a working air gap in a magnetic circuit, the valve member cooperating with the stationary structural elements through the at least one auxiliary air gap and the at least one working air gap, at least one of the structural elements cooperating in the working air gap being at least partially provided on at least one surface facing a corresponding another structural element with at least one nonmagnetic coating.

Abstract: It comprises a distributor body having an output port, a feed port and a return port, and a slider adapted to slide inside the distributor body between a first position isolating the output port from the feed and return ports, a second position connecting the output port to the feed port and a third position connecting the output port to the return port. The slider co-operates with the distributor body to define two pilot chambers fed with a pilot fluid, an output chamber is connected to the output port by an output passage, and a damper chamber in the distributor body includes mechanical means for reducing its hydraulic stiffness and connected to the output port via a damper passage including a calibrated orifice.