Abstract: An electromagnetic drive for a valve includes a housing comprising at least one electromagnetic circuit comprising a coil wound onto a coil support, a valve closing member, at least one core, at least one magnetizable reflux member, an armature having an annular shape at least on a side facing away from the valve closing member, an adjustment device having an adjustment screw, and a device to fix the armature in a non-energized state. The armature moves between a first end position and a second end position so as to act at least indirectly on the valve closing member. The adjustment device adjusts a magnetic force. The adjustment screw is insertable through the at least the magnetizable reflux member or through the core into the armature. Supplying the coil with an electric current causes the armature to move into the first end position or into the second end position.

Abstract: A pressure control valve includes a housing comprising a reference pressure connection, a reference pressure chamber, a preliminary pressure connection, a preliminary pressure chamber, a control pressure connection and a control pressure chamber which are configured to cooperate with a control member moveable in an axial direction within the housing so as to adjust a desired control pressure between a preliminary pressure at the preliminary pressure connection and a reference pressure at the reference pressure connection. A driving device is configured to act on the control member. At least one first sealing device is configured to seal the reference pressure chamber against the control member. At least one second sealing device comprising a second sealing element is configured to seal the preliminary pressure chamber against the reference pressure chamber. At least one third sealing device is configured to seal the control pressure chamber against the preliminary pressure chamber.

Abstract: An electromagnetic drive for a valve includes a housing and at least one electromagnetic circuit comprising a coil wound onto a coil carrier, a valve closing member, an armature movably supported between a first and a second end position which acts on the valve closing member. A device fixes the armature in a currentless state. A core is disposed at an end of the electromagnetic drive directed toward the valve closing member. A magnetizable reflux device has an adjusting bore and a circumferential recess in an area of the adjusting bore on a side facing the coil. An adjustment device has an adjusting screw and adjusts a magnetic force. The adjusting screw influences a course of magnetic field lines and is insertable into the adjusting bore in a direction of the armature. Supplying the coil with a current moves the armature into the first or the second end position.

Abstract: A pressure control valve includes a housing with a lower part and an upper part. The housing includes a coil wound on a coil carrier, an armature configured to be axially displaceable within a bearing, a core, a flux guiding device, a connection bore, and a connector comprising a valve seat for the armature. The connector and the connection bore are disposed in the lower part of the housing. The upper part of the housing is arranged in a force-locked or a form-fitting manner. A bearing bushing for the armature is provided in a portion of the connector directed towards the core. A stop bushing for the armature is provided in an opposite portion of the connector.

Abstract: An electric switching valve for controlling a pneumatic actuator element includes a housing with a ventilation connection channel, a vacuum connection channel and a consumer connection channel. The vacuum connection channel comprises a first valve seat and the ventilation connection channel comprises a second valve seat. An electromagnetic drive is arranged in the housing. The electromagnetic drive is configured so that a magnetic armature is translationally movable in a passage channel to form a valve closure body for each of the vacuum connection channel and the ventilation connection channel. A cross-sectional constriction device is disposed in the ventilation connection channel.

Abstract: A compact venting valve for the fuel tank of a motor vehicle comprises a valve housing with at least one switchable element for providing at least two switching positions and with at least three connections, a first connection to the fuel tank or to a fuel vapor filter connected downstream thereof, a second connection to a filling pipe of a fuel tank and a third connection to atmosphere. The valve housing includes at least one first filter chamber enclosing a second fuel vapor filter, wherein a first switching position provides for operational venting of the fuel tank in which a flow path between the first and second connections is enabled and a second switching position provides for refuelling venting of the fuel tank in which a flow path between the first and second connections is enabled with the second fuel vapor filter being bypassed.

Abstract: A compact venting valve for the fuel tank of a motor vehicle comprises a valve housing with at least one switchable element for providing at least two switching positions and with at least three connections, a first connection to the fuel tank or to a fuel vapor filter connected downstream thereof, a second connection to a filling pipe of a fuel tank and a third connection to atmosphere. The valve housing includes at least one first filter chamber enclosing a second fuel vapor filter, wherein a first switching position provides for operational venting of the fuel tank in which a flow path between the first and second connections is enabled and a second switching position provides for refuelling venting of the fuel tank in which a flow path between the first and second connections is enabled with the second fuel vapor filter being bypassed.

Abstract: Valve arrangement for pressure regulation of fuel introduction in an internal combustion engine having a pressure regulation and a shutoff function that can be actuated by an electromagnetic drive. A housing is provided with at least one inlet connection and at least one outlet connection, which are connected to one another by a connection channel. The electromagnetic drive includes an armature which acts on a tappet supporting a closing element, which opens or closes the connection channel. At least one pressure spring element acts on the closing element either directly or indirectly in the closing direction. The armature is supported by a core which can adjust the electromagnetic force applied to the armature.

Abstract: A pressure-regulating apparatus for supply of fuel from a fuel pump in a fuel tank via a fuel line to a distributor of an internal combustion engine, a pressure-regulating valve being arranged in the fuel tank, to return fuel from the fuel line, when the valve is opened, to the fuel tank. The pressure-regulating valve has first and second chambers separated in a liquid-tight manner by a membrane which actuates a valve-closing member. The first chamber has at least one inlet connected to the fuel line by a first branch line and at least one outlet which leads into the fuel tank. The second chamber contains a spring which biasses the valve-closing member to a closed position. The second chamber of the pressure-regulating valve has a second inlet connected to the fuel line via a second branch line, and a switch device in is provided the second branch line to establish different pressure levels in the second chamber.

Abstract: A precompression control arrangement for the supply of fuel from a fuel pump arranged in a fuel tank to a fuel line and then to a fuel distributer of an internal combustion engine. A pressure-regulating valve is arranged in the fuel tank, which diverts fuel from the fuel line when the valve is opened and returns the fuel to the fuel tank. The pressure-regulating valve has first and second chambers, separated in a liquid-tight manner by a membrane which actuates a valve closing member. The first chamber has at least one inlet, connected to the fuel line by a first branch line, and at least one outlet, which leads into the fuel tank. The second chamber has a spring which biasses the valve closing member in the closing direction. The second chamber has a second inlet, which is connected to the fuel line by a second branch line which incorporates a switch such that different pressure levels can be adjusted in the second chamber.

Abstract: Valve arrangement for pressure regulation of fuel introduction in an internal combustion engine having a pressure regulation and a shutoff function that can be actuated by an electromagnetic drive. A housing is provided with at least one inlet connection and at least one outlet connection, which are connected to one another by a connection channel. The electromagnetic drive includes an armature which acts on a tappet supporting a closing element, which opens or closes the connection channel. At least one pressure spring element acts on the closing element either directly or indirectly in the closing direction. The armature is supported by a core which can adjust the electromagnetic force applied to the armature.

Abstract: An electromagnetic switching valve for use in an internal combustion engine has a coil housing containing an electrical coil, and a value housing containing a valve plate for selectively opening and closing an opening in the housing through which a medium can flow from an inlet to an outlet thereof. An armature is in operative association with the coil electrical coil for undergoing longitudinal movement in the housing depending upon energization of the coil, and the armature acts on a rod movable with the armature. The rod is radially guided during movement thereof, and the rod is connected by a ball and socket joint to the valve plate. The rod is engaged with the armature within the coil housing for longitudinal movement therewith without any radial connection therebetween. The valve housing which containins the valve plate can be inserted in a surrounding connection housing which may contain a filter and elastic valve elements for pressure control.

Abstract: An electropneumatic control valve for regeneration of a fuel absorption element by supply of air to the absorption element includes a valve comprised of a valve seat member (5) and a valve sealing member (4). The valve seat member is displaceable under the action of a pneumatic control section (2B) while the valve sealing member (4) is displaceable under the control of an electromagnetic control section (2A). The operation of the valve members (4, 5), takes place independently of one another by the respective control sections. During strong suction pressures in connector (11), valve seat member (5) is lowered and during the opening stroke of the valve sealing member (4) a minimum opening is provided whereas during low suction pressure at connector (11) the valve seat member (5) is raised and during the opening stroke of the valve sealing member (4) a maximum valve opening is produced. The valve members are slidably and guidably supported in a fixed sleeve (6) provided with calibrated openings (15).

Abstract: A fluid switch for measuring throughput in a fluid line, the fluid switch having an electrical switch and an associated membrane subjected to the pressure of the fluid introduced into a working chamber of the fluid switch. The fluid pressure causes simultaneous opening of a fluid outlet of the fluid switch and of contacts of the electrical switch. Thereby, the number of openings and closings of the switch will be representative of the number of openings of the fluid outlet and the throughput of the fluid. The membrane carries a projection serving as a valve which cooperates with a valve seat on the fluid outlet and the valve is coupled through a tappet to the electrical switch to open the switch when the valve is lifted off the valve seat.