Abstract: A fuel injection system for internal combustion engines having a plurality of fuel injection valves of the top-feed type and a fuel distributor, which has a distributor duct formed in a plastic housing and connecting branches, each of which accepts an end-face supply connection of an injection valve. For simplified manufacture and assembly and in order to secure the injection valves against radial twist, electrical plug jacks are integrated in the plastic housing of the fuel distributor to accept corresponding electrical plug elements of the injection valves. Two of the plug jacks are associated in each case with one of the connecting branches in such a way that when the injection valve is pushed into the connecting branch the plug elements simultaneously penetrate into the associated plug jacks.

Abstract: A method for mounting a filter on the valve, the filter includes a filter cloth which is disposed on the circumference of the valve body in such a way that the filter cloth covers the through openings of the valve body. The filter cloth is provided with a sprayed plastic coating except in the area of the through openings in order to fix the filter cloth in its position relative to the through openings. In this way, contamination of the valve interior with plastic particles is avoided. The method according to the invention is particularly suitable for fuel injection valves for fuel injection systems of internal combustion engines.

Abstract: A multipin plug including plug housings which are connected in a floatingly movable manner in the horizontal and vertical direction to one central floor part of a receiving opening of the multipin plug so that offsets occurring between the first and the second electrically conductive contacting elements are compensated and damage is avoided. Such a multipin plug is particularly suitable for electrically connecting fuel injection valves to the multipin plug.

Abstract: A hydraulic circuit for a fuel injection system having fuel injection valves, in which even under hot start conditions in an internal combustion engine, it is assured that the engine will start and continue to operate reliably. The hydraulic circuit is embodied such that the fuel pumped by a fuel feed pump into a fuel supply line reaches an annular fuel inflow chamber of a valve socket of a first fuel injection valve, and from there can flow through the fuel injection valve and emerges into an annular fuel return groove in the valve socket, from which it can flow via a connection to the annular fuel inflow chamber of the next fuel injection valve in succession. The fuel returns upwardly so that any air in the fuel will go upwardly with the fuel.

Abstract: A fuel injection system for an internal combustion engine having a fuel supply line and at least one electromagnetically actuated fuel injection valve for metering a fuel injection quantity, which valve includes a mouthpiece fitting embodied on the valve body which protrudes into an opening in an intake tube of the engine, and the end remote from the mouthpiece fitting communicates via a fuel inflow opening with the fuel supply line. To meet hot-start conditions of the engine, the valve body is surrounded by a sheath and between the sheath and the valve body an annular chamber is formed, which extends over a substantial portion of the axial length of the valve body. Via one inflow and one outflow opening, the annular chamber is incorporated into the fuel flow in the fuel supply line.

Abstract: A fuel injection device for internal combustion engines including a fuel distributor which has a plurality of connection fittings with a radially protruding locking collar. A plurality of fuel injection valves embodied as so-called top-feed valves that are inserted in a liquid-tight manner into the connection fitting. For retention of the fuel injection valves these valves are provided with oppositely disposed catch springs which extend parallel to the valve axis and on faces oriented toward one another have a groove and locking protrusion for engaging the locking collar from behind.

Abstract: A fuel distributor for fuel injection systems of internal combustion engines having at least one fuel injection valve and at least one valve carrier which has a receiving bore for the fuel injection valve. The fuel injection valve includes an end flange surrounding the receiving bore on which flange the fuel injection valve is axially supported by means of a collar. The end flange of the valve carrier and the collar of the fuel injection valve are embodied as mutually corresponding parts of a bayonet mount, in order to provide positional fixation of the fuel injection valve independently of a plug hood to be mounted onto a protruding end of the fuel injection valve. The plug hood includes blocking tangs on an end face that form-fittingly engage recesses in the bayonet mount that serve the purpose of locking and unlocking the fuel injection valve.

Abstract: A fuel injection system for internal combustion engines is proposed which serves the purpose of fuel injection into the air intake tube of the engine. The fuel injection system includes a fuel injection valve, which is supported upstream of a throttle valve in a holder body disposed coaxially in the air intake tube. A fuel supply line leads to the fuel injection valve, extending in a downwardly directed manner toward the fuel injection valve and away from a deaeration chamber. A fuel return line leads away from the fuel injection valve, extending in an upwardly inclined direction to discharge into the regulating chamber, disposed at a higher level, of a pressure regulating valve. A fuel feed line originating at a fuel supply pump terminates in an upwardly directed manner into the dearation chamber, which communicates via a dearation nozzle with the regulating chamber, so that vapor bubbles can escape upstream of the injection valve into the return side of the injection valve.

Abstract: A fuel supply line, which serves to supply fuel to a fuel injection system for internal combustion engines. The fuel supply line includes receptacles, in each of which a stepped receiving bore is formed with the bores arranged to surround the injection valve in the axial direction and open both at the mouthpiece and the connection end of the injection valve. The injection valve is held by a holding body with a holding shoulder of the injection valve resting on a holding step of the receiving bore. The receiving bore of the receptacle extends outside the flowthrough cross section of the fuel supply line. A filter element is provided in the flow path of the fuel between the flowthrough cross section and fuel openings at the circumference of the injection valve. The fuel supply line, together with the receptacles, is advantageously manufactured of plastic as an extruded part.

Abstract: An apparatus for effecting electrical connection of fuel injection valves for fuel injection systems of internal combustion engines connected to an electronic control unit simultaneously onto each of the individual fuel injection valves. The individual plugs of the apparatus associated with each fuel injection valve are disposed on a common connection strip which can be fastened to the engine by means of threaded bolts and can be connected to the electronic control unit by means of a cable harness.

Abstract: In valves having flat armatures, in order to attain the shortest possible switching times, the goal is to to reduce the mass of the armature and the surface area of the stops. A particularly advantageous design is obtained by embodying the flat armature in the manner of a gear wheel and providing at least three radially extending teeth, spaced uniformly apart from one another, on which the stop lobes that cooperate with a stop integral with the housing upon actuation of the valve by excitation of the magnetic coil are formed. A flat armature embodied in this way can be used in any correspondingly embodied valve.

Abstract: An electromagnetically actuatable fuel injection valve which has an internal scavenging system for cleaning dirt particles from a magnetic field air gap. A portion of the fuel flowing in via an inflow line and an inflow opening reaches the vicinity of an air gap defined on one side by an armature and on the other by magnetic poles and flows through this gap, and then flows via an outflow opening to enter an outflow line that communicates with a fuel return. As a result of the described scavenging of the air gap, dirt particles are prevented from becoming firmly attached there and causing impairment of the performance of the fuel injection valve.

Abstract: Contact pins of fuel injection valves are typically sealed off from the valve housing with sealing rings and provided with small plastic caps to protect them from an extruded plastic coating. The present invention simplifies this sealing. Accordingly, the housing includes axially aligned ducting bores with each ducting bore including a bore wall, each ducting bore of a valve housing is provided with at least two spaced bore grooves and each contact pin has at least two spaced contact pin grooves. Automatic sealing of the bores is attained by extrusion filling of the ducting bores and extrusion covering of the contact pins in the vicinity of the contact pin grooves based on the different temperature coefficients of the valve housing and plastic covering used.

Abstract: The invention relates to an electromagnetically actuatable fuel injection valve which is used to supply fuel to a mixture compressing internal combustion engine. The fuel injection valve comprises a valve housing provided with an extension in which a valve seat body is disposed. A magnetic coil is mounted on each of the pole parts and a permanent magnet is disposed between the poles of the pole parts. The valve seat body is connected to a guide via a collet. The guide, collet and valve seat body are penetrated by a valve needle which is connected at its one end to an armature and which, at its other end, ends in a closing end. In the guide is a guide bore which is adapted to radially guide a spherical head portion of the valve needle and which then tapers into an abutment face, against which face the valve needle rests by way of the head when the injection valve is open. To open the valve, the valve needle is moved outwardly, thereby uncovering an ejection opening between a valve seat and the closing head.

Abstract: An electromagnetically actuatable fuel injection valve which serves to supply fuel to a mixture-compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a valve housing with a mouth piece in which a valve seat body is disposed, two magnet coils two cores and one armature, which has a spherical guide section and is connected to a valve needle. The spherical guide section is slidably supported with its circumference in a guide bore of the valve seat body and in its stroke movement away from the core is limited by a tapering stop opening which adjoins the guide bore. A plastic bushing is mounted on a guide step of the valve seat body and is pressed by a spring against the core end face, thereby preventing a dirct flow of fuel to the remnant air gap on the armature, as a result of which the depositing of soil particles in the gap is avoided.

Abstract: An electromagnetic valve consists of two valve housing parts, connected by crimping and axially braced, and having a magnetic pipe care therein. A flat armature is positively connected with a spherically shaped valve closing part, which extends through a central opening in a guide membrane for cooperation with a valve seat. The guide membrane rests via an outer circumference on a collar and is supported there via the axial tensioning force between the valve housing parts in assembled form. The guide membrane is welded to the collar on the outer circumference upon at least two points. Before the valve housing parts are combined, the guide membrane, abutting the collar, in concentrically guided into position by a centering body, having a slightly larger diameter than the valve closing part, on the valve seat and is welded at said points in this position. Thereupon the centering body is removed and the actual assembly of the valve is performed.

Abstract: An electromagnetically actuatable fuel injection valve, which serves to supply fuel to a mixture-compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a valve housing with a mouth piece, in which a valve seat body is disposed, included are two magnet coils, two cores and one armature, which has a spherical guide section and is connected to a valve needle. The spherical guide section is slidably supported with its circumference in a guide bore of the valve seat body and in its stroke movement away from the core is limited by a tapered stop opening which adjoins the guide bore. Radially extending grooves are machined into the wall of the stop opening and are coextensive in the wall of the guide bore, so that the area of contact between the spherical guide section and the stop opening is decreased.

Abstract: An electromagnetically actuatable fuel injection valve which serves to supply fuel to a mixture-compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a valve housing with a mouth piece, in which a valve seat body is disposed, included are two magnet coils two cores and one armature, which has a spherical guide section and the later is being connected to a valve needle. The spherical guide section is slidably supported with its circumference in a guide bore of the valve seat body and in its stroke movement away from the core is limited by a tapering stop opening which adjoins the guide bore. Flat faces are provided on the circumference of the spherical guide section, such that they decrease the area of contact between the spherical contact section and the stop opening.

Abstract: An electromagnetically actuatable fuel injection valve which serves to supply fuel to a mixture-compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a valve housing with a mouth piece, in which a valve seat body is disposed, included are two magnet coils, two cores and one armature of soft magnetic material, which with an extension is inserted into a receiving bore of a spherical guide section made from hard material and is connected to a valve needle. The spherical guide section is slidably supported with its circumference in a guide bore of the valve seat body and in its stroke movement away from the core is limited by a stop opening adjoining the guide bore.

Abstract: An electromagnetically actuatable fuel injection valve, which serves to supply fuel to mixture-compressing internal combustion engines having externally supplied ignition. The fuel injection valve includes a base plate into which pole pieces having bent poles are inserted. Magnetic coils are fitted onto the pole pieces. A first permanent magnet is inserted between the poles and a second permanent magnet is disposed between the magnetic conductor elements disposed on the other end of the pole pieces. Beginning at the base plate, the magnetic coils and the pole pieces are provided with a sprayed-on plastic jacket. The plastic jacket is inserted together with the base plate into an internal housing bore of a valve housing.