Abstract: An electromagnetically actuatable valve which serves in particular to inject fuel into the intake tube of internal combustion engines operating with fuel injection. The fuel injection valve includes a valve housing, a shell core with a magnetic winding, and a flat armature which is firmly connected to a valve element having a tubular section and a spherical section. A guide diaphragm attached to the housing engages a guide edge of the flat armature in an elastic manner and guides the flat armature parallel to the end face of the shell core. The coaxial guidance of the spherical section relative to the valve seat is effected by means of guide faces of a guide ring. As a result, the movable valve element can have an elongated embodiment, and the fuel injection can be effected at any desired location of the intake tube, while the valve simultaneously requires little installation space.

Abstract: An electromagnetically actuatable valve, in particular a fuel injection valve for fuel injection systems. The valve includes a valve housing of ferromagnetic material and a core on which a magnetic coil is placed. An intermediate disk of ferromagnetic material is disposed on the end face of the cup-like valve housing. The passage bore has a lesser diameter than the inner bore of the valve housing. A flat armature partially protrudes beyond the stop face of the intermediate disk remote from the valve housing and again has a smaller diameter than the inner bore of the valve housing. Because of the small diameter of the flat armature, the flat armature has a small mass, so that short switching times of the valve are attainable.

Abstract: An electromagnetically actuatable valve, especially an injection valve for fuel injection systems which supply internal combustion engines with fuel, is proposed in which the fuel injection valve encompasses a valve chamber and a core upon which a magnetic coil is mounted by means of a carrier body. Fuel supply openings discharge into a flow passage provided around the magnetic coil. Vapor bubbles dissolved in the fuel may be flushed out of the flow passage via a first restriction into fuel return openings which communicate with a fuel return line. On the other hand, the fuel may flow from the flow passage into the collecting chamber which houses a valve component and a valve seat. Vapor bubbles which may appear near the valve component may be flushed out via a second restriction which is provided in the interior of a core to reach the fuel return openings. Thus, disturbances with fuel injection, especially during the "hot start" of the internal combustion engine, are avoided.

Abstract: A fuel injection valve is proposed for fuel injection systems of internal combustion engines, which serves to supply fuel into the intake tubes of the engine. The injection valve includes a movable valve element which cooperates with a fixed valve seat. Downstream of the valve seat a bore is provided in the valve body. A charge controlling device in the form of an insert having a section having axially extending flutes thereon is pressed into the bore. The insert has a section on its end away from the fixed valve seat that functions as a metering section. The metering section has a diameter smaller than the internal diameter of the bore, with the metering of fuel taking place in the space thus provided. A diversion means downstream of the charge controlling device serves to divert fuel flow from a valve in a radially extending fan-type spray into an intake tube.

Abstract: A fuel injection system for injecting fuel into the air intake tube of an internal combustion engine, including at least one fuel injection valve, which is disposed in a holder body and communicates with a fuel supply line and a fuel outflow line. The fuel injection valve is provided with a fuel supply groove, branching off from which are fuel inlet openings, and a fuel outflow groove, leading away from which are fuel outlet openings. The fuel injection valve is guided in the radial direction in a guide opening of the holder body by supporting bodies of a fuel filter which extends axially over the fuel injection valve, covering the fuel supply groove and the fuel outflow groove. The middle supporting body of the fuel filter is embodied such that it seals off the fuel supply line and the fuel supply groove from the fuel outflow line and the fuel outflow groove.

Abstract: An electromagnetically actuatable valve is proposed, which serves in particular to inject fuel into the intake tube of internal combustion engines operating with fuel injection systems. The fuel injection valve includes a valve housing, a shell-type core having a magnetic coil, and a flat armature. The flat armature is firmly connected with a spherical valve element which passes through a central guide opening in a guide diaphragm and cooperates with a fixed valve seat. The guide diaphragm guides the valve element in the radial direction toward the valve seat. The flat armature contacts the guide diaphragm via a concentric shoulder providing tension thereto so that the armature is guided in a plane parallel to the end face of the shell core. The fuel supply to the valve is effected via radial inlet openings in the valve wall.

Abstract: An electromagnetic fuel injection valve and a process for the adjustment of the armature stroke (H) of the fuel injection valve is proposed, which serves to inject fuel under low pressure into the suction pipe of an internal combustion engine. The fuel injection valve surrounds an armature guided in a valve housing. This armature is tightly fastened to a movable valve section which cooperates with a fixed valve seat in a nozzle body supported in a nozzle carrier. The armature stroke can be adjusted in an assembled condition of the fuel injection valve by moving the nozzle body in an axial direction. For this the stroke (H.sub.eff) is measured by an odometrical system (distance sensing system), in the assembled condition of the fuel injection valve while the electromagnetic system is excited and the fixed valve seat provided on the nozzle body is displaced with the aid of a pressing tool by the difference between the measured stroke (H.sub.eff) and the desired armature stroke (H).

Abstract: A fuel injection valve and a method for the automatic establishment of the desired armature stroke of the fuel injection valve are proposed which serves the purpose of injection at low fuel pressures into the intake tube of a mixture-compressing internal combustion engine with externally-supplied ignition. The fuel injection valve includes a magnetic coil surrounding a core and a flat armature guided by at least one guide diaphragm held on its outer circumference, which is firmly connected with a movable valve element cooperating with a fixed valve seat. The fuel delivered via a fuel inlet nozzle can proceed through apertures and recesses in the guide diaphragms past the valve seat to a fuel discharge nozzle by way of which a portion of the delivered fuel can flow back again into a fuel return line. Via an annular channel the fuel stream exiting from the nozzle bore can be prepared with air which surrounds the fuel stream.

Abstract: A fuel injection valve and a method for manufacturing the fuel injection valve serving to inject easily vaporized fuels are proposed in which the fuel injection valve includes a closing body that controls the fuel outlet and is subjected to a closing force and a nozzle holder secured on the internal combustion engine or on the suction tube. A nozzle body is displaceable within the nozzle holder against a shaped disc until such time as the closing spring supported in the inner area on the shaped disc has an initial stress which corresponds to the valve opening pressure force.

Abstract: The invention relates to an electromagnetically actuatable valve, which serves in particular to inject fuel into the suction tube of mixture-compressing internal combustion engines having externally supplied ignition. The valve includes a flat armature which is firmly connected with a movable valve element, embodied as a ball which cooperates with a fixed valve seat. The flat armature is provided on its side remote from the valve seat with recesses into which spring tongues formed from a remnant air disc protrude, resting under the influence of voltage on the flat armature and guiding it in parallel fashion.

Abstract: A method is proposed which serves to produce a valve needle of a needle valve. The basis of the method is the production, from a wire serving as the raw material, of a springlike coil on a carrier body, where the adjacent courses of the coil rest on one another, and this coil applied to the carrier body is provided on its circumference with a predetermined contour by grinding on a grinding machine. After the grinding, the individual courses of the coil, forming the individual valve needles, are separated. The wire serving as the raw material and the valve needles after separation of the courses of the coil can be subjected in a suitable manner to a heat treatment. In a simple and inexpensive manner, the method assures the production of curved valve needles with precise dimensions.

Abstract: A fuel injection nozzle assembly for use in an externally ignited internal combustion engine of the air/fuel mixture-compressing type and with fuel injection into a tube through which air is suctioned into the engine, comprising a fuel injection nozzle and heat-insulating means surrounding a part of the nozzle is described. The heat-insulating means surround especially the nozzle part to be inserted into a bore in the wall of the air intake tube. Preferably, the heat-insulating means is a sleeve member made of heat-insulating rubber. The assembly is such that the fuel injection nozzle can be readily removed from the air intake tube. Moreover, both the fuel injection nozzle and the sleeve member can be assembled as a unit.

Abstract: What follows is a description of a fuel injection system for spark plug-ignited internal combustion engines with compression of the air-fuel mixture and structure for controlling the system pressure. The system is one which includes a device for regulating a fuel injection quantity operating in dependence on the air quantity streaming through a suction tube of the engine, a pressure regulator for determining normal system pressure, injection nozzles which have an opening pressure lower than the system pressure, a continuously delivering fuel pump, and the structure identified above. This structure adjusts the device for regulating the fuel injection quantity so that the starting pressure in the system is retained below the opening pressure of the injection nozzles and above the vapor pressure of the fuel until a quantity of fuel sufficient to replace the quantity of fuel evaporated or leaked due to a temperature gradient in the system resulting from engine cut off has been restored.