Abstract: A fuel injector for fuel injection systems of internal combustion engines, having a valve needle which works together with a valve seat face to form a sealing seat, has an armature acting on the valve needle. The armature is movably guided on the valve needle and is damped by an elastomer ring made of an elastomer. The armature has at least one fuel channel for supplying fuel to the sealing seat. A flat supporting ring which axially supports the elastomer ring in the area of the outlet end of the fuel channel is arranged between the elastomer ring and the armature.

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: The invention relates to a valve, in particular for a fluid-regulated heating and/or cooling system of a motor vehicle, having a valve chamber (18, 218), with at least one inlet conduit (14, 214) and at least one outlet conduit (16, 216) branching off from it, and having a displacement rod (26, 226) movable by an actuator, and having at least one valve member (20, 220), which is located on the displacement rod (26, 226) and cooperates with at least one valve seat (24, 224) of the valve chamber (18, 218), and at least one damping element (20, 220) is provided, which slows down the speed of the displacement rod (26, 226) upon closure of the valve (10, 12).

Abstract: A solenoid valve is for controlling an injection valve of an internal combustion engine, including a housing part, an electromagnet having a magnetic coil and a magnetic core, an armature acted upon by a valve spring and axially movable between the electromagnet and a valve seat, and a control valve member moved by the armature and cooperating with the valve seat for opening and closing a fuel passage, in which the armature is situated in the housing part movable in the radial direction free from mechanical guiding means. A further development provides that, when a current is applied to the electromagnet,the armature may be aligned in the radial direction, by magnetic reluctance forces then acting upon the armature, into a centrical position with reference to the centerline of the electromagnet.

Abstract: An electromagnetic valve has a cylindrical-shaped valve housing, a fixing core; a movable core; a first return spring; a coil; a first valve mechanism including a movable seat member, a second return spring, a first valve part, a first valve seat, and a first valve hole, and a second valve mechanism including a cylindrical-shaped valve seat member, a second valve seat, a second valve hole, and a second valve part, wherein, on the movable seat member, a cylindrical-shaped guide part, when the second valve part is seated on the second valve seat, is cut off from the valve chamber but, when the second valve part is separated from the second valve seat, forms an annular-shaped passage communicating with the valve chamber and is slidably fitted into the second valve hole; and a communication passage for allowing the annular-shaped passage to communicate with the interior of the guide part is formed.

Abstract: To make it possible to easily produce a solenoid for a solenoid valve at low cost by reducing the number of parts and assembling steps. In a solenoid for a solenoid valve, a pole face is formed on an end wall portion of a magnetic case which covers a bobbin around which a coil is wound, thereby allowing the end wall portion to function as a stationary core, an end surface of a moving core inserted in center holes of the bobbin and the magnetic plate is set opposed to the pole face, and the moving core is adsorbed by the end wall portion by energizing the coil.

Abstract: A valve (1) for supplying fuel gas to a gas appliance comprises a valve housing (2) having a valve chamber (3) extending therethrough. Fuel gas is supplied through an inlet port (5) to the valve chamber (3) and from main and secondary outlet ports (6,7) to a burner and a pilot light jet, respectively, of the gas appliance. A primary valving member (35) and a secondary valving member (36) co-operate with a primary valve seat (15) and a secondary valve seat (20), respectively, for isolating the main and secondary outlet ports (6,7) from the inlet port (5). A main carrier member (30) carries the primary valving member (35) and is magnetically coupled to a first secondary carrier member (31) which is driven by a stepper motor (38). A second secondary carrier member (32) is magnetically coupled to the main carrier member (30) for carrying the secondary valving member (36).

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 flow control valve capable of increasing a delivery flow rate gradually with a simple structure, comprising a flowout port (26) to deliver a pressure fluid to the outside, a valve disc (3) having a pressing part (31) to arbitrarily open and close the flowout port, and a valve operating body (8) moving the pressing part of the valve disc, characterized in that, when flow is delivered from the flowout port, the flat surface of the pressing part of the valve disc closing the flowout port is inclined by the delivered flow from the flowout port.

Abstract: A method is for the manufacture of an electromagnetic actuator, e.g., for the actuation of a charge cycle valve of an internal combustion engine. The actuator includes a rotary armature movable back and forth by electromagnets and supported in an actuator frame The electromagnets are first inserted loosely into the actuator frame and then brought into a defined spatial position in relation to the rotary armature by passing a current through the magnet. Next, the electromagnets are fixed in the actuator frame, corresponding to selected operating positions. The electromagnet may be provided with studs, which protrude through openings in the actuator frame into the outer chamber of the actuator and at which the electromagnet is connected to the actuator frame, for example, by laser beam welding.

Abstract: A valve mechanism in which a valve member is moveable into contact with a valve seat as a result of actuation of the valve. The valve seat and the valve closure member are designed such that they have essentially only line contact when the valve is closed, with the nominal width of the valve corresponding approximately to the sealing width of the valve. This construction allows a relatively large nominal width to be used for the flow cross section of the valve without the need for a much larger actuating force for the valve. To prevent damage to the valve seat and to the valve closure member, an elastic damping element may be disposed behind the valve closure member so that the valve closure member can deform compliantly up impact against the valve seat.

Abstract: The invention concerns a valve, particularly a solenoid valve, with an inlet connection and an outlet connection, having between them a shut-off device with a valve seat and a closure member. In such a valve, it is endeavoured to obtain a small output with a simple design. For this purpose, the closure member has a closing element and a tappet separate from the closing element, the closing element being held in a guiding arrangement.

Abstract: The invention provides an impact armature for a solenoid device, adapted to move and perform a working stroke when the solenoid device is activated, the armature including a ferromagnetic armature provided with shoulder means; an effector member made of a non-ferromagnetic material and provided with counter-shoulder means whereby the effector member is engageable by the shoulder means of the armature; characterized in that, in operation, the armature performs a two-phase working stroke, wherein, in a first phase, the armature moves relative to the effector member for a relatively short, predetermined distance while the effector member remains stationary, and, in a second phase, the armature completes its working stroke, the shoulder means engaging the counter-shoulder means, thereby carrying along the effector member.

Abstract: The present invention relates to a solenoid valve for a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine having an injector body (1) which includes an electromagnet (19). An armature group of the solenoid valve (18) may be actuated by this electromagnet (19) to relieve the pressure in a control chamber (3), so that a nozzle needle/tappet assembly (2) in the injector body (1) implements an opening/closing movement. The armature group includes a first and a second armature part. The first armature part (30, 45.2) and the second armature part (36, 45.1) are joined to one another by an insert-and-twist connection (31, 38; 47), one of the armature parts (30, 45.2; 36, 45.1) being enclosed by an armature guide (41) which includes anti-rotation elements (42, 43, 52).

Abstract: The present invention relates to fuel injectors having a free floating plunger. Traditional tappet assemblies include a plunger that is mechanically coupled to the tappet, and therefore, cannot be uncoupled over a portion of its movement during an injection event. In the event of a plunger seizure in a traditional tappet assembly, the tappet spring can be prevented from expanding, which can cause major valve train and engine damage. In addition, because the plunger in traditional tappet assemblies is moved to its upward position under the action of the tappet spring, the fuel passages can depressurize if fuel cannot refill the fuel pressurization chamber as quickly as the plunger retracts, causing cavitation bubbles. Therefore, the present invention utilizes a plunger that is not mechanically coupled to the tappet and can uncouple from the tappet during the injection event to address these and other problems related to plunger wear and failure.

Abstract: When an inlet valve is opened or closed via a first mover, by the operation of a first linear actuator, energy accumulated by a first spring or a second spring is discharged by the operation of a second linear actuator, to transmit the energy to the inlet valve via a second mover and the first mover. As a result, the inlet valve can be opened or closed at a high speed, with higher energy efficiency and has an improved durability.

Abstract: The invention relates to a solenoid valve with an inlet connection and an outlet connection, having between them a blocking device with a valve seat, a closure member and an armature, which influences a position of the closure member in relation to the valve seat. It is endeavoured to make a valve with a simple embodiment and little wear. For this purpose, it is ensured that the armature is arranged in a housing, dividing it into two chambers, and that the armature has a movement stroke with several sections, one first section being in the form of an idle stroke, during which a connection between the two chambers is open and the position of the closure member in relation to the valve seat does not change, and a second section being in the form of an effective stroke, during which the connection between the two chambers is closed and the armature causes or permits a movement of the closure member.

Abstract: An electro-hydraulic actuator assembly having a plurality of hydraulic pressure operated pistons controlled by a single solenoid operated shut-off and vent valve. Eaton hydraulic piston has an exteriorly extending arm attached thereto for contacting a release latch on the engine valve gear for disablement or deactivation of the valves in selected engine combustion chambers. The actuator assembly is disposed with the shut-off and vent valve vent port vertically above the hydraulic piston bores; and, a bleed orifice is provided for bleed flow from the hydraulic piston bores to the valving chamber in the shut-off and vent valve for permitting bleed flow and air purge. Gravity flow from the vent port may also provide lubrication for the engine cam surface.

Abstract: A solenoid valve for brake systems, including a spool movably set in a valve housing, provided along its central axis with the first orifice which has a predetermined diameter, and provided at a position around the plunger with a plunger guide having a predetermined depth for allowing the plunger to enter the spool, thus opening and closing the first orifice. A valve seat portion is formed on the inner surface of the bore of the valve housing by stepping the surface. This valve seat portion defines the second orifice therein, and comes into contact with or spaced from the end of the spool to selectively open the outlet, separately from the first orifice when the spool moves in either direction. The second orifice has an inner diameter larger than that of the first orifice. A spool restoring spring normally biases the spool toward the plunger.

Abstract: A proportional pressure control valve is described capable of serving as a pilot, servo or direct control valve and having a pressure reducing function and a pressure maintaining function. The valve is comprised essentially of a valve housing (2) with inlet and outlet ports (4, 5, 6), a control element (7), an armature rod (8) and a proportional magnet (3). The proportional magnet (3) is an assembly of a magnet core (10), a magnet armature (11) and a magnet coil (12), whereby the proportional magnet (3) when in its range of operation possesses a nearly constant magnetic strength. In accord with the invention, when in a holding position of the magnetic armature (11) the smallest possible gap (13) exists between the magnet armature (11) and the magnet core (10).

Abstract: The metering valve has a shutter for a discharge conduit, and an electromagnet for controlling an armature disconnected from a relative stem and sliding along the stem by means of a sleeve. The armature is secured to the stem by a shoulder of the armature cooperating with a C-shaped ring fitted to the stem. A plate is interposed between the sleeve of the armature and a ring nut to reduce the overtravel of the armature, is locked transversely by a support of the electromagnet, and is kept resting on the ring nut by a compression spring. To secure the armature to the stem, the plate has an opening which is ineffective in reducing overtravel when the plate is moved transversely with respect to the armature.

Abstract: A fuel injector (1), in particular for direct injection of fuel into the combustion chamber of an internal combustion engine having fuel mixture compression and spark ignition, includes an armature (20) which cooperates with a solenoid (10), and a valve needle (3) connected to the armature (20), on which valve needle a valve-closure member (4) is provided which together with a valve-seat surface (6) forms a sealing seat. The valve needle (3) passes through the armature (20) and an extension (15) formed on the armature (20) in such a way that a pin (32) may be inserted into a bore (34) in the extension (15) of the armature (20), whose alignment coincides axially and radially with a bore (35) in the valve needle (3), so that an axial pre-lift gap (30) is formed between the armature (20) and the valve needle (3).

Abstract: A solenoid valve includes a coil assembly accommodated in a solenoid housing having an end wall at one end thereof. A stationary core is magnetically coupled to the end wall and inserted into one end of a center bore, and a movable core opposed to the stationary core is inserted into the other end of the center bore. A yoke plate opposed to the other end of the coil assembly is coupled to the other end of the solenoid housing, and a collar made of a non-magnetic material adapted to guide the axial movement of the movable core is inserted into the other end of the center bore through a central portion of the yoke plate. A rod operatively connected to the movable core is connected to a valve member accommodated in a valve housing connected to the solenoid housing.

Abstract: A valve structure that includes a housing, a valve, a first resilient element, and a second resilient element. The housing includes a first fluid communication path between a first port and a second port. The valve is movable with respect to the housing, and includes a first valve element and a second valve element. The first valve element includes a second fluid communication path, a first seal, and a second seal. The second fluid communication path provides restricted fluid flow between the first and second ports. The first seal engages the housing. The second valve element is positionable between first and second arrangements with respect to the first valve element. The first arrangement of the second valve is spaced from the second seal, and the second arrangement of the second valve engages the second seal. The first resilient element extends between the housing and the first valve element, and the second resilient element extends between the first and second valve elements.

Abstract: A solenoid valve is described, its armature having a part that is slidingly displaceable on the foundation bolt and is movable between two stops of the foundation bolt against the tension force of a restoring spring. When the armature strikes the valve seat of the solenoid valve, the slidingly displaceable part moves further under the influence of its inertial mass on the foundation bolt in the closing direction against the tension force of the restoring spring, until it strikes the second stop of the foundation bolt. The resulting transfer of momentum to the foundation bolt reduces impact of the armature on the valve seat and causes the armature to more quickly reach a defined rest position in which the solenoid valve is closed.

Abstract: A solenoid valve includes a moving part, a plunger of magnetic material having one end facing an end face of the moving part, and a protrusion formed at the one end of the plunger and abutting on the end face of the moving part. During energization, a magnetic path is formed from a valve body to the moving part to produce an attraction force between the valve body and the moving part across a clearance. Magnetic flux running along the magnetic path becomes saturated at the protrusion.

Abstract: The microvalve comprises a drive housing (3) in which a magnetic drive is arranged that includes a solenoid (1) and an armature (6) adapted to be actuated by the solenoid. A flanged housing (2) in which two valve seats (10a, 10b) are formed is mounted against the drive housing. Arranged between the drive housing (3) and the flanged housing (2) is a diaphragm (5) which is adapted to be pressed against the valve seats by means of a commutation rocker (4) coupled to the armature. The commutation rocker (4) has a pivot bearing, the axis (13) of which, for avoiding tolerances, assumes a position which is determined by direct abutment on a seating surface of the flanged housing (2) facing the drive housing (3).

Abstract: A double safety magnetic valve with two valves being accommodated in a housing, both axially displaceable valve disks thereof are disposed coaxially to, one another and each lifts from its respective valve seat through an axial movement in opening direction against the spring pressure of a first and second closing spring respectively, wherein the second, in flow direction of the double safety magnetic valve inner valve disk comprises as adjustment element a magnetic armature and the first, i.e. outer valve disk is motion-coupled with the inner valve disk in opening direction.

Abstract: A valve-clearance estimating apparatus estimates a valve-clearance that is a minute spacing between a valve drive element, and a valve element, which form an essential part of a moving body of an electro-magnetically operated valve. A position sensor determining an instant position of the valve drive element, a mass-change estimating portion estimate the mass of the moving body moving together with the valve drive element, and a valve-clearance estimating portion estimates the valve-clearance on the basis of a given position of the valve drive element determined by the position sensor at a time when a change in the mass of the moving body is estimated and when the valve drive element reaches proximate to one of its extreme positions.

Abstract: A fuel injection valve is capable of minimizing the waste of fuel and variations in the air-fuel ratio by weakening a water hammer action occurring as a result of sudden closing of a needle valve and thus suppressing the occurrence of a bouncing phenomenon. A water hammer absorbing member is provided between an armature and an injection hole to absorb and damp a water hammer pressure wave produced by sudden closing of the needle valve. Therefore, it is possible to reduce the pressure wave propagated to the armature, to which the needle valve is integrally secured, and hence possible to reduce the amount of lift of the needle valve due to a bouncing phenomenon. Accordingly, the amount of fuel excessively discharged is reduced. Thus, it becomes possible to minimize the waste of fuel and variations in the air-fuel ratio.

Abstract: A fuel injector valve for fuel injection systems of internal combustion engines has a magnetic coil, an armature to which the magnetic coil applies a force against a resetting spring in the lifting direction, and a valve needle connected to a valve closing member. The armature is able to move between a first stop connected to the valve needle and limiting the movement of the armature in the lifting direction and a second stop connected to the valve needle and limiting the movement of the armature against the lifting direction. The second stop is formed by a spring element.

Abstract: An evaporative control valve includes a plunger reciprocable between a valve stop and a valve seat to open and close a controlled port. The plunger has a body, a flexible support member mounted on one end of the body and a resilient tip positioned on the support member for sealing engagement with the valve seat. When the resilient tip of the plunger impacts the valve seat, the flexible support member absorbs substantially all of the force of impact by deflecting in the direction opposite the plunger movement, increasing impact time and reducing noise which may be generated. The resilient tip may be positioned on the flexible support member to further define a stop cushion to further reduce impact of the plunger against the valve stop.

Abstract: A device for operating a gas shuttle valve through an electromagnetic actuator secured and mounted in a component which has an opening and a closing magnet with an axially displaceable armature between the opening and closing magnet. The armature acts through the use of an armature plunger in conjunction with a spring system on a valve stem. A play-compensation element is arranged between the armature plunger and the valve stem.

Abstract: A solenoid valve includes a coil assembly accommodated in a solenoid housing having an end wall at one end thereof. A stationary core is magnetically coupled to the end wall and inserted into one end of a center bore, and a movable core opposed to the stationary core is inserted into the other end of the center bore. A yoke plate opposed to the other end of the coil assembly is coupled to the other end of the solenoid housing, and a collar made of a non-magnetic material adapted to guide the axial movement of the movable core is inserted into the other end of the center bore through a central portion of the yoke plate. A rod operatively connected to the movable core is connected to a valve member accommodated in a valve housing connected to the solenoid housing.

Abstract: An electromagnetically actuated valve (1) has a core (5), a solenoid coil (8) and an armature that can be acted upon by the solenoid coil (8) in a stroke direction in opposition to a restoring spring (27), and a valve needle (13). The valve needle (13) is fixedly joined both to the armature (11) as well as to a valve-closure member, which cooperates with a fixed valve seat, and constitutes a movable valve element. On the valve needle (13), between the armature (11) and the valve-closure member, an auxiliary body (30) is arranged, which is movable relative to the valve needle (13). The valve needle (13) is designed as having a driving arrangement (34) such that, in response to a motion of the auxiliary body (30) in the stroke direction, the valve needle (13) can be accelerated in the same direction by energy transfer, and a rapid opening of the valve is realized.

Abstract: The invention provides an impact armature for a solenoid device, adapted to move and perform a working stroke when the solenoid device is activated, the armature including a ferromagnetic armature provided with shoulder means; an effector member made of a non-ferromagnetic material and provided with counter-shoulder means whereby the effector member is engageable by the shoulder means of the armature; characterized in that, in operation, the armature performs a two-phase working stroke, wherein, in a first phase, the armature moves relative to the effector member for a relatively short, predetermined distance while the effector member remains stationary, and, in a second phase, the armature completes its working stroke, the shoulder means engaging the counter-shoulder means, thereby carrying along the effector member.

Abstract: A two-stage parallel spring solenoid valve (100) includes a coil housing (102) with a plunger tube (108) disposed therein. Disposed within the distal end (112) of the plunger tube (108) is a valve body (128) that includes a valve seat (138). A plunger assembly (160) is disposed within the plunger tube (108) and includes a plunger (162) and a plunger rod (184). An external spring (170) and an internal spring (190) are installed in parallel with each other within the plunger assembly (160). The valve (100) is movable from a closed configuration wherein the plunger rod (184) is seated against the valve seat (138) to block fluid flow through the valve (100), to an intermediate configuration wherein the plunger (162) further compresses the external spring (170) and the internal spring (190) and the plunger rod (184) remains seated against the valve seat (138), and to an open configuration, wherein the plunger rod (184) is distanced from the valve seat (138) to permit fluid flow through the valve (100).

Abstract: A solenoid-operated valve has a disk-shaped member connected to one end of a movable iron core, for integrally interlocking the movable iron core; and a lining member formed of an elastic material for covering the disk-shaped member; wherein when a solenoid section is in a non-excited state, only a part of a projection formed on the lining member contacts with a lower surface of a ring member, and when the solenoid section is excited, a contact area of the projection with respect to the ring member is gradually increased.

Abstract: A fuel injection valve for a fuel injection system of an internal combustion engine includes a magnetic coil, an armature loadable by the magnetic coil against a resetting spring in the lifting direction, and a valve needle connected to a valve closing member. The armature is movable between a first stop connected to the valve needle and limiting the movement of the armature in the lifting direction and a second stop connected to the valve needle and limiting the movement of the armature against the lifting direction. A damping spring, which may be a cup spring, is provided between the second stop and the armature.

Abstract: A magnetic valve for a fluid-controlled heating and/or cooling installations has a valve housing, an electromagnetically switched valve member which in a first fixing position makes a connection between an inlet conduit and an outlet conduit and in a second switching position blocks the connection, a valve shaft provided with an armature and connected movably to the valve member, the valve shaft having a side which faces the valve member and is provided with a unit for slowing down a speed of the valve shaft upon closure of the valve member, the valve housing and the valve member being arranged so that a flow direction of a fluid around the valve member is opposite to a closing direction of the valve member.

Abstract: A switchable solenoid valve is disposed between the master cylinder port and the wheel caliper port for an anti-lock brake system. The switchable solenoid valve includes a valve housing, a valve seat that includes a center orifice and a plurality of perimeter bores, and an axially moveable valve plate and tappet for sealing against the valve seat. The switchable solenoid valve is movable between a normally open position, a closed position and an intermediate position that occurs when the brake system is in anti-lock mode. In the open position, both the valve plate and tappet are spaced away from the valve seat to allow unrestricted pressure fluid flow between the master cylinder and the wheel caliper. When the solenoid valve is moved in to the closed position, the valve plate is in face-to-face engagement with the valve seat to seal the perimeter bores while the tappet is simultaneously sealingly engaged with the center orifice.

Abstract: In a double seat valve (1) comprising a valve body (8) with an upper valve disk (6) and a lower valve disk (7), an upper valve seat (4) for the upper valve disk (6) and a lower valve seat (5) disposed underneath for the lower valve disk (7), and an adjustment element for the valve body (8) for opening this valve body (8) against the action of a closing spring (9), the valve body (8) is guided displaceably on the adjustment element and that on the adjustment element a limit stop (14) is provided which takes the valve body (8) along in opening direction (10), which limit stop (14) is spaced from its bearing, effective in taking along, on the valve body (8) when the valve body (8) has been closed. Upon opening the adjustment element first performs an idle stroke, before the valve body is taken along. Upon closing the adjustment element performs an additional overtravel corresponding to the idle stroke, when the valve body already rests with both its valve disks on the respective valve seats.

Abstract: A valve including a cylindrical bore having a circular seat at one end thereof, a valve member that is movable in the axial direction of the seat, and control means connected to the valve member, the valve member including a first portion which serves as a closure element, and a second portion which is engaged in the bore and which is shaped to regulate the flow of the fluid at a desired rate depending on the axial position of the valve member, the second portion of the valve member is detached from the first portion and has a cylindrical outside surface of diameter such that it is in sliding contact with the cylindrical surface of the bore; at least one recess is formed in the cylindrical outside surface of the second portion of the valve member so as to define a passage having a predefined shape, and means is provided for permanently holding the two portions of the valve member in mutual contact so that they are displaced axially simultaneously under the action of the control means.

Abstract: An electromagnetic actuator for operating a driven component includes first and second electromagnets having respective first and second pole faces oriented toward one another and defining a space therebetween; an armature disposed in the space and movable back and forth between the first and second pole faces; a driving component attached to the armature for moving therewith as a unit; and a resetting spring assembly coupled to the armature and exerting forces opposing movements of the armature caused by electromagnetic forces generated by the electromagnets. The resetting spring assembly is in a relaxed state when the armature is in a mid position between the first and second pole faces. A coupling device connects the driving component with the driven component for effecting a transmission of pushing and pulling forces from the driving component to the driven component to cause displacements of the driven component as a function of displacements of the armature and the driving component.

Abstract: A valve for controlling liquids for its actuation is provided with a liquid-filled coupling chamber, which is disposed between a step-up piston, actuatable by a piezoelectric actuator, and a piston that actuates a valve member. To compensate for leakage in the coupling chamber that is at high pressure, a filling valve is provided. The filling valve is disposed between the step-up piston and the piezoelectric actuator. Upon each return stroke of the piezoelectric actuator, the step-up piston follows the piezoelectric actuator with a time lag, so that the filling valve opens briefly and allows filling of the coupling chamber. The valves intended for use in fuel injection systems for internal combustion engines of motor vehicles.

Abstract: A control valve contains a housing with an inlet connection, an outlet connection and a return connection. A first seat valve with a first valve body and a second seat valve with a second valve body are disposed in the housing. The first seat valve is disposed between the outlet connection and the return connection and is normally closed and the second seat valve is disposed between the inlet connection and the outlet connection and is normally open. The second valve body is disposed coaxially in the first valve body.

Abstract: A fuel injection valve for a fuel injection system of an internal combustion engine, in particular for injecting fuel directly into the combustion chamber of the internal combustion engine. The fuel injection valve has a magnet coil, an armature that can be pulled by the magnet coil in a direction of lift against a first return spring, and a valve needle. The valve needle has a first stop surface for the armature, which can be moved relative to the valve needle. The armature is acted upon by a second return spring. In addition, a stationary second stop surface for the armature is provided. The second return spring acts upon the armature in a direction opposite to the lift and in an inoperative position, when the magnet coil is not energized, and holds the armature in contact with the second stop surface so that a distance between the armature and the first stop surface provided on the valve needle is predefined.

Abstract: The metering valve has a shutter for a discharge conduit, and an electromagnet for controlling an armature disconnected from a relative stem and sliding along the stem by means of a sleeve. The armature is secured to the stem by a shoulder of the armature cooperating with a C-shaped ring fitted to the stem. A plate is interposed between the sleeve of the armature and a ring nut to reduce the overtravel of the armature, is locked transversely by a support of the electromagnet, and is kept resting on the ring nut by a compression spring. To secure the armature to the stem, the plate has an opening which is ineffective in reducing overtravel when the plate is moved transversely with respect to the armature.

Abstract: A solenoid valve comprises a first coil, a plunger, a first and a second opening in the valve, and a latching mechanism placed in association with the first opening. The latching mechanism causes latching, with a predetermined latching force, of the plunger to the first opening, and energization of the first coil along a predetermined first polarity causes at least a reduction of the latching force. The plunger has a first end towards the first opening and a second end towards the second opening, and a magnetic field extensor extends a first pole of the magnetic field produced by the first coil to the first end of the plunger. The extensor comprises a hollow cylindrical ferrous member terminated by a ferrous endpiece and is movable, with the plunger, relative to the first opening.

Abstract: The metering valve has a shutter for a discharge conduit, and an electromagnet for controlling an armature disconnected from the respective stem and sliding along the stem by means of a sleeve. The stem is guided by a fixed sleeve and is pushed by a first spring to hold the shutter in the closed position, and a second spring keeps a shoulder of the armature resting axially against a C-shaped ring fitted to the stem. To reduce the overtravel of the armature with respect to the travel of the stem to move the shutter into the closed position, and to damp oscillation of the armature, provision is made, between the two sleeves, for a bush of calibrated thickness, which slides along the stem and is such as to form a small axial clearance with the sleeves.