Abstract: The injection pump has a pump piston driven with a constant stroke which pumps fuel at injection pressure to an injection nozzle so long as an electrically actuated overflow valve blocks the flow of the fuel overflowing via an overflow conduit to a low-pressure chamber. The overflow valve is a needle valve, the valve needle of which, opening inward toward a pressure chamber that can be placed under injection pressure, by means of a conical closing surface radially defining a needle tip controls a valve seat that widens conically toward the pressure chamber. The cone angle of the closing surface is larger than the cone angle of the associated valve seat and the closing surface forms a sealing edge, the diameter of which is equal to or only slightly smaller than the guide diameter of the guide shank on the valve member.

Abstract: A fuel injection nozzle for internal combustion engines having a cartridge filter provided with two groups of longitudinal grooves, disposed in a fuel conduit one of which groups of longitudinal grooves originates at one end of the filter while the other group originates at the opposite end of the filter. All longitudinal grooves terminate in a central section of the filter. The fuel conduit and the reduced diameter of the central section of the filter define an annular slit. The longitudinal grooves have a cross-section decreasing over the extent thereof to their termini, so that any excess and harmful amounts of fuel in the filter can be decreased, while maintaining the same external diameter of the filter for purposes of filter replacement in existing fuel injection nozzles.

Abstract: A fuel injection nozzle is proposed in which the wrench hexagon of the nozzle holder, in order to reduce the structural length, is arranged to surround the spring chamber and the leakage oil connection is placed in this area of material reinforcement.

Abstract: A nozzle holder for internal combustion engines is proposed, in which a sleeve can be secured in the cylinder head by means of a tightening nut. The sleeve protects the portion of the nozzle which protrudes into the combustion chamber from thermal effects. Ease of serviceability is attained in that when the nozzle holder is rotated out of the cylinder head, the sleeve is simultaneously removed, without requiring additional hand operations.

Abstract: A fuel injection nozzle for internal combustion engines having a filter body inserted into the fuel inflow conduit, an injection valve and a check valve, which maintains a static pressure in the injection nozzle and can also perform a relief function for the prevention of after-injections. The check valve is integrated into the filter body thereby simplifying the final assembly of the injection nozzle. The filter body is advantageously embodied as a rod-type filter, which by the appropriate shaping of its jacket periphery forms gap-like spaces between itself and the surrounding wall of the nozzle holder through which spaces the fuel must pass such that it is deflected multiple times.

Abstract: A fuel injection nozzle for internal combustion engines having an inwardly opening valve needle (I nozzle) is proposed, in which an induction coil is disposed in the closing spring chamber, the induction coil together with an armature influenced by the valve needle forming a signal transducer for a measuring appliance for detecting the onset of injection and further data, as needed, of the injection process. The air gap of the magnetic circuit of the induction coil is formed between the armature and a coil, toward which the armature moves during the opening stroke of the valve needle. As a result, it is possible to attain a small initial air gap and a large change, in terms of percentage, in the air gap. The apparatus according to the invention is particularly suitable for measuring circuits in which a direct voltage is applied to the induction coil and the voltages induced as a result of the air gap changes in the induction coil are superimposed on the applied direct voltage.

Abstract: A fuel injection nozzle for internal combustion engines, having a valve needle arranged to open toward the outside and said valve needle further connected with a piston which defines a fuel-filled damping chamber, which communicates with the flow path of the fuel only via a throttle conduit during the opening stroke of the valve needle. The damping chamber is formed in a cap which is placed onto the piston. As a result, jamming of the elements in the radial direction is avoided. Furthermore, the piston may be embodied by the valve needle per se, resulting in a simple and space-saving construction. By means of the appropriate embodiment and supporting of the cap, the damping effect can be limited dependent on the stroke and/or the travel speed of the valve needle.

Abstract: A fuel injection nozzle for internal combustion engines, having a valve seat that is part of the housing and a valve needle, which has a conical throttling pintle, which during a first partial stroke of the valve needle dips into a conical injection port. The valve seat is formed inside the injection port and the sealing face or sealing edge of the valve needle merges in an unstepped manner with the throttling pintle, the conical angle of which is only slightly larger than the conical angle of the injection port. As a result of this disposition, a sealed closure of the injection port is attained, and carbonization of the throttle gap is substantially avoided.

Abstract: A fuel injection nozzle for internal combustion engines having a valve needle which enters an intermediate position in a retarded fashion and subsequently reaches its final position quickly. The valve needle is coupled in a positively-engaged manner with a supplementary body which as a result of its mass and/or hydraulically damps the movement of the valve needle over the course of a first stroke portion. At the end of this stroke portion, the supplementary body strikes a shoulder attached to the housing, whereupon the valve needle after the attainment of a notably higher fuel pressure, is separated from the supplementary body and translated quickly into its open position. In special cases, it is also possible for two supplementary bodies to be provided, which are uncoupled one after another from the valve needle and then again recoupled to the valve upon the closure of the valve.

Abstract: A fuel injection nozzle for internal combustion engines having an inwardly opening valve needle is proposed, this valve needle has a channel comprising two parts, the first of which located in the upstream direction, has a smaller measurement in cross section in one dimension than the diameter of the communicating or downstream part which has the exact injection diameter. As a result, the entry of shavings into the downstream part and the consequent alteration in injection are avoided.

Abstract: A fuel injection nozzle for internal combustion engines, provided with a valve needle and an induction coil, which sits in a spacer plate mounted between the nozzle body and the nozzle holder. The valve needle projects into the induction coil and acts upon the magnetic domain of the induction coil by the action of its movement, whereby a signal dependent on the velocity of the needle is produced. The induction coil is provided with laterally disposed contact prongs which are connected with extended connecting wires by means of a weld or solder joint. The connecting wires lead through boreholes in the nozzle holder. The injection nozzle is distinguished by an especially small electrical line resistance, and by the fact that, with appropriate dimensioning and construction of the ends of the connecting wires, which carry the extended connection contacts, there will be no special contact measures necessary for disassembly.

Abstract: To provide for coupling the injection needle of a Diesel injection valve with an inertia mass, and thereby provide for speed damping of the movement of the valve, the pressurized Diesel fuel is applied to a chamber (20,68) in the valve body (10,12,14), which slidably retains the needle valve element (18) at a location downstream of the inertia mass, the inertia mass subdividing the chamber into a spring or pressure chamber (20) and a damping chamber (68) forming a dead, or storage chamber for fuel, the inertia mass being slidable in the second chamber and the clearance between the inertia mass and the walls of the chamber forming a throttled connection duct so that, upon command to opening movement, the needle valve element will engage, after a short dead distance (v), the inertia mass (62) which must move against the flow resistance through the throttled connection upon shifting of fuel between the first and second chamber and thus damping the speed of operation of the valve element.

Abstract: A fuel injection valve with an electrical terminal signalling when the injection opens includes a second switch which is serially connected, electrically, with the needle valve so that the needle valve (15) can break an electrical circuit upon first lifting off the valve seat (16,17), full movement of the needle valve even upon engagement with the housing (10,11,12) still leaving an open circuit condition of an electrical terminal (49), although the needle valve body (15) re-engages the housing, by including a second switch (40,42; 51,52) serially with the switch formed by the valve cone and valve seat (17,16), the second switch including a movable second element (40,51) slidable with respect to a first fixed element (42,52) and moved by a push sleeve (28) or a push rod (70) with a dead or lost motion upon movement of the valve element (15) for a portion (h.sub.2) of its full stroke (h.sub.

Abstract: The invention relates to a fuel injection nozzle in which a control piston acts on the valve needle, which control piston can also be acted upon by another fluid with an arbitrarily changeable pressure. In this manner it is relatively simple to meet the ever increasing requirements to apply an influence of engine characteristic values to the fuel injection process.

Abstract: To provide for electrical insulation between a movable valve element sealing the nozzle opening (28) of a fuel injection valve, the valve body (10, 11, 12, 13) is formed of a metal and shaped to be secured to the engine block of an internal combustion engine, and the needle valve element (15, 18) has a valve seat (17) fitting against a matching sealing surface (16) in the valve body, the valve pin element being electrically insulated from the valve body, while retained therein in reciprocable sliding connection on a guide surface by placing an aluminum sleeve or jacket around the pin and forming a coating of aluminum oxide by anodic oxidation on the outside of the aluminum sleeve to, simultaneously, provide for a wear-resistant and insulating surface capable of maintaining the valve pin in slidable, reciprocating position within the valve body while providing for electrical insulation with respect thereto, the valve pin being electrically connected to an external terminal (50, 52) to permit obtaining an elect

Abstract: A fuel injection pump provided with an outwardly opening valve needle, on the valve needle head of which there is disposed an injection cone, tapered in the direction of the fuel flow in extension of a cylindrical section of the needle head, for the purpose of shaping the injection jet.

Abstract: To provide two pressure ranges for selective control of the stroke of a fuel injection valve, the valve element has a plate-like rocker coupled thereto, which is engaged at one side by the customary closing spring, for example via a spring disk having a central projection fitting into a matching depression of the rocker element. The rocker element is pivotable about a pivot bearing (22), for example in form of a knife edge, secured to the needle valve, the pivot bearing engaging the side of the rocker element remote from the spring and subdividing the rocker element into two unequal rocker arms (24, 26) which, respectively, bear against shoulders (25, 29a) of the housing.

Abstract: A fuel injection nozzle is proposed, intended in particular for Diesel engines, in which an induction coil is installed in an intermediate disc. The coil core is embodied by a pressure element and a valve needle in force-locking contact therewith. An annular permanent magnet is secured either on the pressure bolt or on the intermediate plate. This embodiment of an injection nozzle, as a so-called needle stroke transducer, is used when it is desired to ascertain the duration of injection and especially the onset of injection.

Abstract: A fuel injection nozzle having a valve needle opening outward is proposed in which the valve needle is suspended in place in the base of a spring plate embodied in the form of a cup.

Abstract: The invention relates to a fuel injection nozzle, in which at least two levers are disposed between the valve needle and the spring support plate of the closure spring, which levers are supported with one end on the housing and the other end on the valve needle, these levers being supported in the middle region on the spring support plate, thereby permitting a certain lever path. As a result it is attained that during this first lever path or a first stroke of the valve needle, because of the action of the levers, the closing force exerted by the spring on the valve needle is reduced in accordance with the lever translation. As a result of this intermediate-position control of the needle stroke, with the creation of a pressure step in consequence, cold-start hammering of the engine is avoided, and quieter operation is made possible, as a result of the resulting prolongation of injection time during idling and at partial load.