Abstract: The valve needle includes a connecting part that is manufactured from a semifinished profiled section and joins an armature and a valve closure member. Together with the armature, the profiled connecting part forms flow channels. Since the fuel flowing through the flow channels arrives downstream from the flow channels, outside of the connecting part and up to the valve seat, there is no need for fuel outside the connecting part. The valve needle is especially suited for injectors in fuel-injection systems of mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: An electromagnetically activated valve possesses an electromagnetic circuit, formed by, among other things, a magnetic coil, a magnet housing, and a core which serves as the inner pole. A valve element which serves as the anchor and closing element is spherical in structure, and moves axially within the magnet housing. A contact element is arranged between the core and the valve element, and has a contact surface with a spherical curve, facing the valve element. The valve element is surrounded by a guide element at least in part in the circumference direction, which element has a guide opening which also has a spherical curve, at least in part. The valve, in the form of a fuel injection valve, is particularly suitable for use in fuel injection systems for mixture-compressing, outside-ignition internal combustion engines.

Abstract: A fuel injection valve has downstream a valve seat (23), an injector plate (23), which is characterized by having a plurality of swirl-producing elements on the intake side, followed by at least one uninterrupted annular gap in the downstream direction. The swirl-producing elements are arranged in a turbine vane-shaped form by each individual element running mostly radially and being tilted in the peripheral direction and the elements being arranged behind one another in a circular shape. The annular gap (45) represents the spray geometry. With this arrangement the fuel can be finely atomized without additional power consumption. The breakup into minute droplets results in further reduction of the exhaust emissions of an internal combustion engine and in lower if fuel consumption. The fuel injection valve is especially well-suited for use in injection systems of mixture-compression externally ignited internal combustion engines.

Abstract: A gaseous fuel injector has a ball valve which is spring urged to a closed position. Positioned below this valve is the armature of an electromagnetic solenoid having an extension which abuts against the ball valve. The ball valve is normally closed against a valve seat to prevent passage of gas through the injector. With each actuation of the solenoid, the armature extension drives the ball valve upwardly from its valve seat to provide an injection of gas from the injector. The ball valve member, limit stops on the armature, and the surface along which the armature slides are all fabricated of durable, heat resistant plastic material which resists wear, provides low friction and are dimensionally stable over varying environmental conditions.

Abstract: A solenoid-operated fuel injector has a housing forming an enclosure which contains a solenoid coil assembly having electrical terminals extending therefrom via which the fuel injector is connected with a connector for selectively energizing the solenoid coil by electric current to operate the fuel injector. A fuel rail delivers pressurized liquid fuel to a fuel inlet which is at one axial end of the injector. Fuel is injected from the enclosure at an axially opposite nozzle outlet end. A valve mechanism is disposed within the enclosure and is operated by the solenoid coil acting through a spring-biased armature to open and close a flow path through the enclosure. The coil orientation allows the injector electrical terminal to be lowered, so the terminals exit from the bottom of the coil.

Abstract: The nozzle plate according to the present invention includes an axial passage for a fluid, particularly for a fuel, which is made up in the downstream direction by a filter, a ring chamber and an uninterrupted ring gap following one another. Using this arrangement, a cohesive tulip-shaped jet lamella can be produced which thins out in the downstream direction and then disintegrates into tiny droplets. As a consequence, the exhaust emission of an internal combustion engine can be further reduced and likewise a reduction of the fuel consumption can be achieved.The nozzle plate is suited particularly for injection valves in fuel injection systems of internal combustion engines with externally supplied ignition which compress the mixture.

Abstract: An atomizing sieve of a fuel injection valve having a dish-like concavely cambered form is provided downstream of at least one spray orifice of the fuel injection valve, as seen in the direction of flow of fuel. The atomizing sieve is cast with an outer circumferential region in a protective cap provided at the downstream end of the fuel injection valve. For protection against mechanical effects, protective prongs of the protective cap project further downstream than the lowest region of the atomizing sieve. When the fuel is being injected, a part quantity collects in this lowest region and represents a comparatively static liquid quantity which new fuel then strikes. This arrangement allows an ideal break-up of the fuel into very small droplets. The atomizing sieve also forms a protective shield against icing-up, plugging and settlement of chemical substances within the fuel injection valve.

Abstract: A valve needle includes a valve needle section which connects the armature section and the valve closing element section, the valve needle section having a solid construction. In order to ensure that the fuel flows in the direction of the valve seat, at least two axial grooves are provided in the armature section. The axial grooves in the armature section are constructed in such a way that the emerging fuel can flow along the outer circumference of the valve needle section in the direction of the valve seat. The valve needle is particularly suitable for injection valves in fuel injection systems of mixture-compression, spark-ignition internal combustion engines.

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 fuel injection valve includes a valve-closure member which is provided with semicircular flattenings. The deflecting surfaces delimiting the flattenings and formed obliquely to the longitudinal valve axis cause a rotational energy to be applied to the fuel. The application of rotational energy to the fuel makes it possible to clearly reduce the change in flow rate caused by the rotational position of the needle, so that the variance in the static flow rate is considerably decreased. The valve is particularly suitable for application in fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.

Abstract: An air-assist fuel injection system controls the supply of compressed air to the fuel injectors according to the operating status of internal combustion engine. For cold start operation, compressed air is supplied continuously to the injectors; while, for partial load (cruising) and partial acceleration, air is supplied as a pulsating (air volume control) flow consisting of air pulses coincident with the injected fuel pulses. On the other hand, for acceleration and deceleration, the supply of compressed air to the injectors may be inhibited. Further, idle speed control can be achieved using the air-assist to the fuel injectors, thereby eliminating need for a separate idle speed control valve. To enhance system operation, a fuel injector may be employed in which both the fuel and the applied compressed air are swirled, but in opposite directions, so as to achieve a fuel spray of small particle size.

Abstract: A fuel injection valve and method for adjusting the static fuel quantity output ejected during the steady opening state of the fuel injection valve. In the method according to the invention, the static fuel quantity is adjusted directly in the otherwise completely installed fuel injection valve, so that a variation on the static fuel quantity of the various fuel injection valves is minimized. To this end, a throttle device, serving to meter the fuel and whose free flow cross section is variable, is provided upstream of the valve seat. The method according to the invention is suitable for fuel injection valves of various kinds.

Abstract: An electromagnetically actuatable valve including an armature with a connecting part joined to a valve element. The magnet armature is provided with at least one recess including a shoulder on which a crimped portion of the connecting tube rests. The connecting tube is provided with a thickened portion likewise resting on the magnet armature. This creates a simple connection between the connecting tube and the magnet armature which requires no subsequent machining. The electromagnetically actuatable valve may be used as a fuel injection valve for fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.

Abstract: The fuel injector comprises a magnetic valve member with three dimensions of the same magnitude, a valve member seat on which the valve member is seatable, a magnetic core disposed opposite to the valve member seat and excitable by a solenoid to attract the valve member and generate a clearance between the seat and the valve member which allows the flow of fuel, and an injection section through which the fuel which has passed the clearance is injected out of the injector. The valve seat is shaped as a duct and the clearance between the valve member and the seat has a first portion of decreasing section and a second portion of increasing section.

Abstract: A fuel injection valve comprising, a fuel swirler (6) providing a swirling force to fuel, a fuel nozzle (5) injecting the swirling fuel, an air swirler (7) including an air swirling chamber (7B) and air nozzles (7A) disposed downstream the fuel nozzle (5) adjacent the outlet port (7C) thereof, the air nozzles (7A) are constituted to introduce air into the air swirling chamber (7B) and to cause a swirling air flow therein directed opposite to the direction of the swirling fuel flow from the fuel nozzle (5) whereby the swirling air flow is caused to collide with the swirling fuel flow immediately after being injected from the fuel nozzle (5) in the air swirling chamber (7B) to thereby enhance atomization of the fuel and to properly decelerate the moving velocity of the injected atomized fuel.

Abstract: An electromagnetic fuel injection valve comprises a valve body, a valve seat which cooperates with the valve body, a fuel injection port disposed downstream of the valve seat, and a dividing device which serves to divide injection fuel injected from the fuel injection port. The dividing device is formed integrally with a member in which the fuel injection port is formed and includes parallel walls substantially parallel to each other with the fuel injection port interposed therebetween and arcuate walls connected to the parallel walls having a diameter larger than that of the fuel injection port. The walls extend from said member in a direction of an axis of the valve. The dividing device has an outer diameter substantially equal to the largest diameter of the valve seat.

Abstract: An improvement in fuel flow through orifices of a thin disc orifice member is obtained by incorporating a radially inwardly open undercut in the seat member below the frustoconical seating surface and above the thin disc orifice member. The undercut provides a space that allows a fuel recirculation zone to be displaced further radially outwardly so that it poses less of an obstruction to flow toward the orifice.

Abstract: An electromagnetically operated injection valve including a fuel filter that has a filter housing on which a return spring is supported and which includes a frame that is pressed into a flow hole so that the force introduced by the return spring onto the fuel filter is guided via the filter housing and the frame pressed into the core. This obviates the need for a setting bushing for setting the spring force. The injection valve is particularly suitable for fuel injection units of mixture compressing spark ignited internal combustion engines.

Abstract: Fuel injection valves have swirl-generating configurations in order to atomize the fuel as it passes through a narrow flow opening. The fuel injection valve of the invention includes a conduit segment leading to a cylindrical injection conduit. The conduit segment includes a conical widening section and, in the region of a wall of the conical widening section, a highly unstable separation zone is created as fuel passes through it. This zone builds up and collapses again periodically with relatively high frequency so that turbulence created along the wall of the ensuing injection conduit causes the stream surface to break down early as the fuel leaves an injection port; as a result, the stream has fine fuel droplets and nevertheless has a defined stream pattern so that properly aimed injection is made possible. The invention is intended in particular for fuel injection systems for internal combustion engines.

Abstract: Keys on legs of a U-shaped stator are in keyed engagement with keyways on diametrically opposite sides of the O.D. of the sidewall of a valve seat member to axially and circumferentially locate the seat member.

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 injection valve, having a valve closing member comprising an armature and a valve closing body, disposed within a nozzle holder. The nozzle holder has a bore which is provided with at least one plastically deformed guide protrusion on one end and that extends at least partway around the bore. The guide protrusion is stamped into a guide segment of the nozzle holder. The injection valve is especially suited for fuel injection systems of mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: A fuel injector including a valve housing having a nozzle for columnarly injecting fuel and a valve seat continuing from the nozzle; a valve body reciprocatably mounted in the valve housing and having a valve portion adapted to abut against and retract from the valve seat and thereby close and open the nozzle, respectively; and an adapter fixed to a front end of the valve housing. The adapter is formed with an atomizer hole communicating with the nozzle and an assist air passage extending through a side wall of the adapter for supplying an assist air into the atomizer hole to atomize the columnar fuel injected from the nozzle. Both the valve portion and the valve seat are formed to have surfaces in a conical shape so that upon retraction of the valve portion, the space generated between the surfaces becomes uniform over substantially the length of the surfaces.

Abstract: An injection valve, having an annular groove on opposite ends on the circumference of the valve body. A retaining ring embodied from a bowed length of wire is retained in each of these grooves. A retaining ring having a spring tension can be mounted simply and economically on the circumference of the valve body and can be secured by snapping into place. The valve may be used as an injection valve for fuel injection systems.

Abstract: A fuel injection valve including a blind hole in a stepped inner pole from which a stop pin extends into a passage hole of an armature which is designed with a tubular blind bore. In the open position of the fuel injection valve, a ball-shaped valve closing body is in contact with the stop pin. The armature is directly connected to the valve closing body so that there is a very short moving valve part. The fuel injection valve of the invention not only has good dynamic behavior but also has a short and compact installation shape. The fuel injection valve is particularly suitable for fuel injection systems of mixture-compressing externally ignited internal combustion engines.

Abstract: A feel injection system for an engine controls a behavior of a nozzle needle for controlling a fuel injection timing and a fuel injection amount. The system controls a hydraulic pressure applied to the nozzle needle for displacing the nozzle needle between its fully opened position and its fully closed position. The system so controls the hydraulic pressure applied to the nozzle needle as to quickly displace the nozzle needle from the fully opened position to a given position which is located between the fully opened and closed positions, on the other hand, slowly displace the nozzle needle from the given position to the fully closed position so as to decrease an impact load applied to a valve seat for the nozzle needle when the nozzle needle is seated onto the valve seat.

Abstract: The collared sphere is a separate part that is assembled into the valve during the assembly process. A resilient spring disc acts through the collar on the sphere to hold the sphere in abutment with the tip end of the armature as the armature reciprocates to open and close the valve. The disc is also a separate part that is assembled into the valve during the assembly process. The outer margin of the disc is supported on a raised ledge without attachment thereto while the sphere fills slightly less than a central circular void in the disc whose diameter is less than that of the sphere. The valve seat is frustoconical, and the disc acts through the collar to maintain the sphere at least approximately concentric with the seat so that when the valve is operated closed any misalignment of the sphere to the seat is taken out by the camming action of the seat on the sphere as the valve closes.

Abstract: A number of fuel injectors are mounted on an elongated carrier that has been inserted endwise into an open end of an elongated hole in a member such as a tube or an engine manifold. Electrical lead wires extend from the fuel injectors along the carrier to a connector on the exterior. The fuel injectors' nozzles are received in sealed manner in holes extending through the wall of said member. A keeper also inserted endwise through the elongated hole in the member keeps the carrier in place. Each injector has a sphere that is resiliently biased by a flat spring blade to close the outlet orifice leading from the frustoconical seat on which the sphere is seated. The spring blade is cantilever-mounted atop a post adjacent the seat. A magnetic circuit encircles the sphere and comprises an armature that acts against the side of the sphere to displace the sphere to eccentricity with the seat for opening the outlet orifice.

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: Disclosed is an electromagnetic type fuel injection valve including a stator iron core, an electromagnetic coil concentric with the stator iron core, a casing formed of a magnetizable material and accommodating therein the stator iron core and the electromagnetic coil, a moving body provided at its end with a valve body, a stopper for the moving body, a valve seat opposite to the stopper with the moving body interposed therebetween and a spring engaged with an end of the moving body for biasing the same, the moving body being adapted to reciprocate between the valve seat and the stator iron core under the magnetizing force of the electromagnetic coil and the biasing force of the spring, and having an armature adapted to be absorbed by the stator iron core and a rod contiguous with the valve body, the armature and the rod being formed of the same material so as to be integral with each other, a guide portion of the rod and a portion of the moving body adapted to abut against the stopper being subjected to a ha

Abstract: An electromagnetically actuable valve having an axial fuel inflow, in which the opening path of the valve closing element is limited by a stop rod device which permits a controlled opening stroke of the valve closing element as a function of a position of the valve needle. The stop rod is arranged concentrically with respect to the valve longitudinal axis so that the stop rod touches the valve closing element in the opening position of the valve and thus limits its opening stroke. The stop rod is mounted in a flow bore of a core of the valve by means of a displacement sheath. The design of the stop device is particularly suitable for fuel injection valves.

Abstract: A fuel injection valve for internal combustion engines having a valve needle which works in conjunction with a valve seat to open and close a valve opening, this valve needle being activated by an electromagnet against a return spring. The return spring rests on a shoulder of an armature, which is fixedly connected with the valve needle, and on a setting tube which is guided in an axially movable opening in the interior of the magnet core of the electromagnet, and through which fuel travels from a fuel inlet nozzle to the valve opening. The valve needle stroke is limited by a cross link with a central stop point which is fixed in the interior of the magnet core. The setting tube is slit longitudinally in the end section facing the return spring and straddles the cross link here on both sides with clearance. Due to the cental stroke stop of the valve needle on the cross link, the valve needle stroke is always constant, even when the valve needle is not aligned with the valve housing axis.

Abstract: A metal end cap for a high pressure fuel injector prevents leakage of fuel as a result of high pressures within the injector. The terminals for the solenoid are insulated from the cap by means a plurality of insulating spacers on either side of a high pressure O-ring seal. The metal end cap is sealed by means of a high press O-ring seal from the body of the injector.

Abstract: A fuel injection valve (10) has a valve member (2) arranged to be controllably movable in an axial direction toward and away from a circular valve seat (4) so as to control fuel flow from a port (5) downstream from the valve seat. An axial fuel passage (7) extends from upstream of the valve seat (4) through a clearance between the seating portion and the seat (4) for producing a substantially non-swirling fuel flow from the port (5). A transverse fuel passage (8) is also provided and the transverse fuel passage extends transversely to the axial passage and communicates with the axial fuel passage at a location offset to a diameter of the valve seat for producing a swirling fuel flow from the port (5). A combination of swirling and non-swirling fuel flow is thus supplied by the port (5), for producing finer fuel droplets of improved distribution.