Abstract: In electromagnetically operable valves which have been proposed, having a fuel inlet connecting piece which is surrounded by a magnet coil and is used as a core, at least a part of the valve is surrounded by a plastic sheath on which an electrical connecting plug is integrally formed. However, different valve extrusion coating tools are required depending on the embodiment of the electrical connecting plug. In the valve, the electrical connecting plug (21) is injection moulded at the same time as the extrusion coating of the magnet coil (4) and thus forms an independent plastic injection molding. Only one valve extrusion coating tool is now required for different embodiments of the electrical connecting plug, resulting in greater flexibility in the assembly line. The valve is used as an injection valve for fuel injection systems.

Abstract: An injection valve can compensate for the reduction in through-flow experienced with known valves operating at higher temperatures. By forming the valve needle and valve seat carrier from different materials and more particularly by using a material with a very low coefficient of thermal expansion for the valve needle, the valve needle expands less in comparison with the valve seat carrier when there is an increase in temperature. Thus, an increase in travel occurs and a reduction in the metered quantity of fuel due to the formation of gas bubbles is avoided. The injection valve is particularly suitable for use in fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.

Abstract: An injection valve can compensate for the reduction in through-flow experienced with known valves operating at higher temperatures. By forming the valve needle and valve seat carrier from different materials and more particularly by using a material with a very low coefficient of thermal expansion for the valve needle, the valve needle expands less in comparison with the valve seat carrier when there is an increase in temperature. Thus, an increase in travel occurs and a reduction in the metered quantity of fuel due to the formation of gas bubbles is avoided. The injection valve is particularly suitable for use in fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.

Abstract: In a fuel injector, a spherical valve-closure member interacts with an edge seat. The edge seat is formed by surfaces that follow one another directly at different angles in the area of the valve seat. The angles of the surfaces are such that the sealing edge of the edge seat points toward the valve-closure member. The fuel injector is especially suited for applications in fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.

Abstract: A fuel injection arrangement for an internal combustion engine which has at least one combustion space and at least one intake pipe leading to this combustion space, with two fuel injection valves opening into the intake pipe upstream from at least one inlet valve. One fuel injection valve has a heater adapter. While only the fuel injection valve with the heater adapter is operated during cold start and the warm-up phase of the internal combustion engine, to a great extent, and the fuel injection valve without a heater is not in operation, a switch from one fuel injection valve to the other takes place at a point in time which is determined on the basis of the value of various operating parameters. The fuel injection arrangement is particularly suitable for use in mixture-compressing, outside-ignition internal combustion engines.

Abstract: The invention is directed to a perforated spray disk which is arranged downstream of a valve seat surface, on one end of a valve seat body, and has a bulge, the collecting space formed between the valve-closing element and the bulge is first of all produced, the perforated spring disk fixed on the valve seat body, by means of a shaped body with a smaller cross section than that of the valve-closing element by plastic deformation of the perforated spray disk in its central area, the inner wall of the bulge merging directly into the wall of the valve seat surface and leads to a collecting space with a very small volume. The invention is particularly suitable for fuel injection valves of fuel injection systems for internal combustion engines.

Abstract: Aggregates, such as fuel-injection valves, are directly connected via their connector pins to the printed-circuit board and do not necessitate any additional structural elements. The plug connector is designed so as not to lie or so as to lie only slightly above the plane of the printed-circuit board, so that, viewed in the extension direction of the fuel-injection valves, a very low overall height is attained for the device. Because of the small unit volume of the printed-circuit board, of the housing, and of the plug connector, the device requires comparatively little space. The device is especially suited for the common electrical contacting of electromagnetically actuated fuel-injection valves.

Abstract: An electromagnetically operable valve having a fuel inlet connecting piece which is surrounded by a magnet coil and is used as a core, at least a part of the valve is surrounded by a plastic sheath on which an electrical connecting plug is integrally formed. In the novel valve, the electrical connecting plug is injection moulded at the same time as the extrusion coating of the magnet coil and thus forms an independent plastic injection moulding. Only one valve extrusion coating tool is now required for different embodiments of the electrical connecting plug, resulting in greater flexibility in the assembly line. The valve is used as an injection valve for fuel injection systems.

Abstract: A valve needle suitable for injection valves for fuel injection systems of internal combustion engines. The new valve needle includes a tubular actuation part, an armature section and a valve sleeve section and is manufactured by injection moulding and subsequent sintered according to a metal injection moulding method. Subsequently, the actuation part is connected to a valve closing element section by means of a weld connection such that the valve needle is manufactured in a simple and cost-effective manner.

Abstract: A fuel-injection valve having a metallic perforated disc arranged on a valve-seat body downstream of a valve-seat. The perforated disc arranged on the valve-seat body is supported by a supporting disc which is provided with a passage orifice and which is thicker than the perforated disc. This effectively prevents an undesirable bending of the perforated disc and at the same time improves the fuel treatment at the spray orifices. The supporting disc is made pot-shaped and is welded, together with the perforated disc, to the valve-seat body by a continuous welding seam. The fuel-injection valve is used in fuel-injection systems of mixture-compressing spark-ignition internal-combustion engines.

Abstract: An electromagnetically operated fuel injection valve has a valve housing, a valve seat body having a valve seat and a guide cylinder, a valve closing element projecting in the guide cylinder and supporting a ball type valve closing body around which fuel can flow through spiral flutes in which the valve closing element releases or interrupts a fuel flow by sitting on or lifting off the valve seat. The valve seat body in addition to the guide cylinder and the valve seat, also contains at least one outlet orifice. The valve seat body is provided with an all-round spiral flute between the guide cylinder and the valve seat.

Abstract: An electromagnetically operable valve having a fuel inlet connecting piece which is surrounded by a magnet coil and is used as a core, at least a part of the valve is surrounded by a plastic sheath on which an electrical connecting plug is integrally formed. In the novel valve, the electrical connecting plug is injection molded at the same time as the extrusion coating of the magnet coil and thus forms an independent plastic injection molding. Only one valve extrusion coating tool is now required for different embodiments of the electrical connecting plug, resulting in greater flexibility in the assembly line. The valve is used as an injection valve for fuel injection systems.

Abstract: A device for injecting a fuel-gas mixture having a cup-shaped gas enveloping sleeve in which the cylindrical part of the gas enveloping sleeve permits exact centering of the gas enveloping sleeve relative to the fuel injection valve. The novel device while having very exact centering of the gas enveloping sleeve relative to the fuel injection valve has the advantage of a simple, economical manufacture. The device includes radially inwardly pointing guide strips that rest with their face ends on the circumference of the fuel injection valve and thus in a simple way center the gas enveloping sleeve relative to the fuel injection valve. The device for injecting a fuel-gas mixture is especially well-suited for injection of a fuel gas mixture into the intake tube of a mixture-compressing internal combustion engine with externally supplied ignition.

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 connecting tube connected at one end to an armature of a fuel injection valve having a valve closing element secured to its other end. The connecting tube is easy to manufacture, it is simple to assemble, it has minimal weight and maximum strength. The connecting tube is resilient elastic and has openings along substantially its entire length and is easy to manufacture by rolling up a sheet-metal blank or by using a rigid spring element with spaced spring coils.

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: 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 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.