Abstract: An injector includes a nozzle body having a bore and defining a seating, and a fuel flow path along which fuel flows, in use, towards the seating. A needle is slidable through a range of movement within the bore, and engagable with the seating to control fuel flow to an outlet aperture. The needle includes a thrust surface against which fuel at high pressure acts, in use, to lift the needle from its seating. The bore and needle together define a restriction to the flow of fuel along the fuel flow path towards the seating. The restriction is located upstream of the thrust surface, and the restriction is arranged to restrict the rate of flow of fuel towards the seating throughout the range of movement of the needle. In a preferred embodiment, the restriction is arranged such that the rate of fuel flow towards the seating through the restriction varies as the needle separates from the seating.

Abstract: A spray gun includes a body with a barrel portion having an inner chamber that extends therethrough from a front to a rear portion, and a grip portion. The grip portion includes a water inlet conduit and water outlet conduit disposed therein that each extend through the grip portion to the internal chamber. A spray nozzle is disposed within the front portion of the barrel and includes a valve seat disposed around an inlet end of a passageway extending therethrough. A popper assembly is slidably disposed within the inner chamber and has a cylindrical body with a valve element at one end that is adapted to form a liquid-tight seal with the valve seat when the gun is operated in a no flow position. The poppet assembly also includes a diaphragm at an opposite end of the body that is adapted to form a liquid-tight seal with an adjacent portion of the inner chamber.

Abstract: An automated fueling facility allows untrained persons to safely dispense homogenous phase liquid methane from a cryogenic storage tank into a motor vehicle. The fueling facility automatically maintains pressure on the liquid methane within a predetermined safe operating range using methane gas trapped in the cryogenic storage tank. The pressure on the liquid methane is at least set equal to a set pressure equal to the sum of the saturation pressure of the liquid methane plus an additional amount to help to ensure that it remains in a fully saturated condition after absorbing any heat during pumping from the storage tank. A pump is cooled by placing it in the storage tank and circulating liquid methane through the pump and back into the storage tank. A dispenser, including nozzle for connecting to a motor vehicle, is cooled by circulating liquid through the nozzle and back to the storage tank through a receptacle on the dispenser to which the nozzle is connected.

Abstract: A pumping and spraying system for heavy filled viscous primary fluid material comprised of a pump for such materials that will pump the primary fluid without cavitation and a plural component spray gun that will spray the material on demand and automatically divert the heavy filled primary fluid material back to a supply source when a trigger is released. The plural component spray gun is provided with generous size primary fluid conduit passageways through a chamber having a primary fluid valve which controls the flow of the primary fluid to a spray nozzle for delivery with a secondary fluid. An open diversion conduit connected perpendicular to the chamber has smaller passageways that divert the primary fluid back to the supply source whenever the primary fluid valve is closed to control and prevent static back pressure. This permits spraying of a heavy filled viscous primary fluid on demand without separation of the fluid components (i.e. packing-out), or clogging of fluid passageways or the spraying tip.

Abstract: An electrically controlled fuel injector unit for fuel injection in internal combustion engines, in which an injection pump, an injection nozzle, and between them a control valve and control magnet are fastened in a fuel injector unit housing. The control valve and the control magnet, including requisite conduits, are combined in a magnet valve housing to form a structural unit that is inserted as a whole into the fuel injector unit housing. The control valve and control magnet are disposed eccentrically in the magnet valve housing, and a high-pressure conduit that connects the pump work chamber to the injection nozzle extends on a side of the magnet valve housing having a greater accumulation of material resulting from the eccentricity.

Abstract: A method and apparatus for spraying liquid coating material containing supercritical fluid or liquified gas as a diluent comprises a spray gun having internal passages which transmit the liquid coating material under high pressure from an inlet to a nozzle at the tip of the gun and then to an outlet so that the liquid coating material can be continuously recirculated. A relatively short flow discharge path is formed between the internal passages in the spray gun and the nozzle to avoid the formation of an area of ambient or reduced pressure so that the supercritical fluid or liquified gas is substantially maintained in solution in the liquid coating until it is discharged from the gun. A pressure regulator is provided to maintain a substantially constant pressure drop across the inlet and outlet of the gun to induce flow of liquid coating material through the gun, and to permit several guns to be connected in series without creating a substantial pressure drop therebetween.

Abstract: The valve comprises a casing and an injection nozzle fixed to this and provided with at least one fuel injection orifice and a shutter member movable under the action of an electromagnet and adapted to control the passage of fuel through the injection orifice, this shutter member being provided with an active surface adapted to engage on a corresponding seat of the nozzle in which the injection orifice is located; the valve is characterized by the fact that it includes passages for supplying fuel to the injection orifice from a region outside the valve, which are formed substantially in a region which is disposed peripherally around the first-defined seat and which lies substantially in a plane perpendicular to the axis of the valve and containing the seat itself.

Abstract: A conditioning system for water based can sealing compounds comprising a pressure regulation means, such as a gravity fed supply tank adjacent a double diaphragm pump, a filter and a lining nozzle, an exit line from the nozzle connected to an upstream pressure regulator and a return line meeting the supply line between the pressure regulation means and the pump. Additionally, one or more dampeners may be added to the system as well as various pressure gauges and other sensors. The use of multiple lining nozzles on one conditioning system is also disclosed, with the nozzles being capable of independent control. The system without dampeners controls film weights to within +/-5% of the desired amount. The use of one or more dampeners improves film weight control to within +/-3% of the desired amount.

Abstract: An enhanced system for cleaning a component, such as a blanket, of a printing press in one embodiment provides circulation of wash mixture around a path in such a way that pressure of fluid in the supply line can never exceed ambient pressure. This may be achieved, for example, by utilizing a pump disposed in the return line (rather than in the supply line). Another embodiment provides a spray arrangement for spraying wash mixture onto the component to be cleaned. The spray arrangement has nozzles that are in communication with a feed region (such as the interior of a spray bar) and an isolation valve arrangement for in an open state permitting and in a closed state preventing fluid pressure transmission from the rest of the system to the feed region. A pressure arrangement modifies fluid pressure in the feed region when the isolation valve arrangement is in a closed state.

Abstract: A spray head attachment adapted for use with a flow metering device such as a metering gear head is effective to discharge a plurality of spiral spray patterns of hot melt adhesive, in elongated strands or fibers, onto the backing sheet of a hygienic article. The spray head attachment includes a manifold having adhesive passageways connected to outlets of the metering gear head, air passageways connected to a source of pressurized air and recirculation passageways connected to a source of hot melt adhesive. Outlets of the adhesive and air passageways, and inlets of the recirculation passageways, are formed on a discharge surface of the manifold in groups or arrays, so that nozzles mounted to the manifold are each connected to one array of adhesive, air and recirculation passageways.

Abstract: A fuel injector for supplying liquid fuel to an air inlet manifold of a spark ignition engine has a fuel-inlet, an outlet defined in a tubular component mounted in a tubular part of the injector body, and at least one orifice formed in a valve seat member downstream of a valve member. The tubular component is spaced downstream from the valve seat member. An air circulation duct is defined between the tubular component and tubular part, so that spray of fuel flowing through the outlet draws air through the duct to minimize dribble of fuel from the injector.

Abstract: A high pressure vortex fuel injector comprising a hollow housing or body including a plurality of passages at least one of which is adapted to receive fuel through an inlet. The injector also includes a passage for guiding the piston into seating relationship with the valve seat to control the flow of fuel through the metering orifice and a solenoid assembly for moving the piston relative to the valve seat. The injector further includes a swirl or vortex chamber, to angularly accelerate the fuel, formed in cooperation with the first surface of the valve seat. The injector additionally includes passages for permitting fuel to circulate about an electric coil thereof, thereby cooling same during instances when the metering orifice is closed. The injector further includes passages within the swirl chamber for assisting in the rapid formation of a conical spray pattern upon the opening of the metering orifice.

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: An improved, simplified pressure/time dependent fuel injector assembly for injecting fuel intermittently into a combustion chamber of an internal combustion engine. The injector assembly includes a unitary or single-piece injector body which has at least one groove-like channel on the exterior surface thereof. The channel is closed and sealed by a sleeve which is press-fit about that portion of the injector body on which the channel lies. For reciprocation within the injector body, there is provided an injector-plunger assembly which includes a top stop mechanism for adjustably setting the distance traveled by the plunger assembly during the reciprocatory movement thereof.

Abstract: A high pressure vortex fuel injector comprising a hollow housing or body including a plurality of passages at least one of which is adapted to receive fuel through an inlet. The injector also includes a passage for guiding the piston into seating relationship with the valve seat to control the flow of fuel through the metering orifice and a solonoid assembly for moving the piston relative to the valve seat. The injector further includes a swirl or vortex chamber, to angularly accelerate the fuel, formed in cooperation with the first surface of the valve seat. The injector additionally includes passages for permitting fuel to circulate about an electric coil thereof, thereby cooling same during instances when the metering orifice is closed. The injector further includes passages within the swirl chamber for assisting in the rapid formation of a conical spray pattern upon the opening of the metering orifice.

Abstract: NOx production from pressure-atomised burners is reducible by shaping, e.g. splitting, the fuel film leaving the burner. This is achieved, in accordance with the invention, by having an external wall 54 which surrounds the fuel outlet orifice 52 and from which external formations 56 extend radially inwardly towards the axis 20 of the burner. The formations 56 penetrate the frusto-conical pattern of fuel (not shown) emitting from the orifice 52 to split the flame into four discrete lobes. Other arrangements are possible in which different numbers of lobes are formed; or assymetric patterns are produced; or shaped flame patterns having no discrete lobes are produced.

Abstract: A fuel injection system for internal combustion systems is proposed, which serves to inject fuel into the intake tube of the engine. The fuel injection system includes at least one fuel injection valve which is disposed in the interior of a holder and communicates with both a fuel supply line and a fuel drainage line. The inflow of fuel into the fuel injection valve takes place radially via an inflow region. An orifice body is secured in the holder, forming a reservoir preceding the inflow region. In the first few seconds after hot starting of the engine, only the fuel stored in the reservoir reaches the inflow region and hence is injected. Because readily volatile fuel components have evaporated beforehand, the fuel stored in the reservoir enables especially good fuel preparation.

Abstract: A high pressure mixing head for mixing reactive components in reaction injection molding includes a mixing chamber discharging into a quieting chamber and an injection valve for injecting reactive component into the mixing chamber. Recirculation passages for the reactive component are provided in the mixing chamber and internally of the injection valve. The recirculation passage internally of the injection valve is selectably opened and closed as is the outlet from the injection valve into the mixing chamber. Both the injection valve outlet and the recirculation passage internally of the injection valve are selectably throttleable.

Abstract: A fuel injector of the open nozzle type, which is capable of achieving SAC pressures in excess of 30,000 psi during injection. The injector assembly of the preferred embodiments includes a plunger assembly having three plungers arranged to form a hydraulic, variable timing fluid chamber between upper and intermediate plungers and an injection chamber below a lower plunger. To prevent leakage from the injection chamber, the fuel supply passage is provided, along with the injection chamber, within a one-piece injector cup and a predetermined minimum seal length, at commencement of injection, between a land portion of an injection plunger and a wall surface defined by a bore of the injector within which it reciprocates is coordinated to the dimensions of the bore below the land and a predetermined maximum solid fuel height for the injector to result in the minimum seal length being at least one-half of the maximum solid fuel height.

Abstract: An electromagnetically actuatable fuel injection valve for fuel injection systems is proposed. The valve includes a valve housing and a first connection pipe serving as the core, which is surrounded by a magnetic coil. A second connection pipe is disposed inside the first connection pipe and with it forms a flow cross section for the inflowing fuel, which via the flow conduit can flow into an interior chamber of the valve housing surrounding the magnetic coil and from there can flow via a connecting line into a fuel chamber surrounding a nozzle needle, this chamber being defined by a guide bore in the nozzle body as well as by an injection port at one end and by an armature on the other. A bypass bore is provided in a head of the nozzle needle leading from this fuel chamber to an inner bore of the armature. This inner bore is open toward the second connection pipe so that at least a partial quantity of fuel is capable of flowing back via the second connection pipe.

Abstract: An electromagnetically operated fuel injection valve structured to include a housing having a fuel inlet opening, a fuel discharge opening and a fuel return opening, there being a continuous liquid path from the inlet opening to the return opening and an intermittent, or valved, liquid path from the inlet opening to the discharge opening. The continuous liquid path has a slope, in the direction of flow toward said return opening, which preferably is always 0 or positive relative to a horizontal axis or plane. A discharge valve is provided in the injector and exists in the valve path. The discharge valve is connected to an armature which is in turn actuated by a solenoid comprised of a coil, a tubular bobbin and an electromagnetic frame. The frame has a vertical tubular core portion and an upper flange extending outwardly therefrom. The coil is disposed on the bobbin and the bobbin is coaxially disposed about the frame core portion below the flange.

Abstract: In an injection valve for fuel-injection systems for internal combustion engines, the closure member opens in the direction towards the combustion chamber. It has an outer surface which widens towards the combustion chamber. Above the closure member, a swirl chamber is provided in the housing of the injection valve, fuel continuously rotating in said swirl chamber as a result of a continuously open return-flow connection to a valve outlet.

Abstract: A tip shut-off fluid injector F has its injection device 1 inset to a fixed female interlocking terminal 2 when in the firing position with which a change-over valve 4 is connected by pipes P or is made integral. The terminal 2 includes valves 8 and 9 and, optionally, a by-pass valve 10. A gearbox 12 connects between the valves 8, 9 and 10 and a handwheel 11. Rotation of the handwheel 11 inserts or retracts the injection device 1 to or from the firing position and also, via the gearbox 12, rotates the valves 8, 9 and 10 between open and closed positions. Before the injection device 1 can be retracted, the handwheel 11 must be initially rotated to rotate the valves 8 and 9 to closed positions to isolate the fluid supply from the injection device 1 and, optionally, to open the by-pass valve 10 to allow fluid to circulate from the supply through the terminal 2 back to return.

Abstract: The invention relates to a nozzle for a paint spraying device having a radially inward valve needle that is connected in a coaxial arrangement with the nozzle. A radially outward paint supply pipe is connected to the valve at one end and a paint source at the other. The valve needle is hollow for paint supply purposes and has a forwardly inclined bore in its tip which opens axially in front of the valve into an annular chamber created between the valve needle and the supply pipe.

Abstract: A modular color changer provides selected paint colors for spraying and continuously recirculates both selected and non-selected colors. A module is provided for each color to be selected and includes supply and return manifold blocks defining, respectively, portions of a respective universal supply manifold and of respective universal return manifold. Port control valves are utilized to control paint flow therethrough, under normal supply pressures. Solvent and air purge valves are used for cleaning. The changer is particularly advantageous when used in high pressure spraying systems. Modules can easily be added to a basic changer to increase the number of selectable paints.

Abstract: An electromagnetic unit fuel injector for use in a multi-cylinder diesel engine has an externally actuated pump for intensifying the pressure of fuel delivered to a pressure actuated injection valve controlling flow discharge out through a spray outlet and which is normally biased to a closed position by a spring. Pressurized fuel from the pump is also supplied via a throttling orifice to a modulated pressure servo control chamber having a servo piston means operatively associated with the injection valve.

Abstract: An electromagnetic unit fuel injector includes a pump assembly having an external actuated plunger reciprocable in a bushing with flow therefrom during a pump stroke being directed to a fuel injection nozzle of the assembly. Fuel flow from the pump can also flow through a passage means, containing a normally open, substantially pressure-balanced control valve actuated by a solenoid assembly in the valve closing direction to block drain flow during a pump stroke, as desired. A piston, actuated by discharge fuel pressure is operatively connected to the control valve to assist the solenoid in holding the control valve in a closed position.

Abstract: In a liquid fuel burner of the spill return type, comprising an atomizer 4 for discharging liquid fuel and a rotary change-over valve 25 for conditioning the burner into a "circulate" mode (FIG. 1) in which no fuel is discharged from the atomizer 4 but circulates through the burner housing 2 and a "fire" mode (FIG. 2) in which liquid fuel issues from the atomizer 4, the rotary change-over valve 25 is adjustable into a plurality of different positions providing different rates of discharge of fuel from the atomizer 4 when the burner is conditioned into its "fire" mode.

Abstract: An electromagnetically actuatable valve is proposed which serves in particular to inject fuel into the intake tube of internal combustion engine operating with fuel injection systems. The fuel injection valve includes a valve housing, a shell core having a magnetic coil and a flat armature, which is positively connected to a valve element comprising a ball which protrudes through a central opening in a guide diaphragm to cooperate with a fixed valve seat. The guide diaphragm guides the ball in the radial direction relative to the valve seat. Under spring tension, the flat armature, having a guide crown, contacts the guide diaphragm and is thus guided in a plane parallel to the end face of the shell core. A first fuel fitting comprises a portion of a valve housing preshaped by a non-cutting manufacturing method; a second fuel fitting is fixed inside the first fuel fitting in such a manner that a flow conduit is defined between the first and the second fuel fittings.

Abstract: A recirculating paint apparatus comprising a main body provided with a plurality of radially extending openings in communication with a main axially extending delivery channel, and a plurality of selectively operable valve assemblies for controlling communication between different color paints and the delivery channel is disclosed. Each paint is recirculated through its associated valve assembly right up to its valve for controlling flow through an orifice in communication with the common delivery channel so that all areas are subject to recirculating flow and any settling out of pigments or solids in the paint is prevented or minimized.

Abstract: An injector including a self-actuating three-way valve lodged in a passage between the fuel injector supply inlet and a control valve. The three-way valve permits fuel to flow from supply through to the control valve during a metering mode of operation while prohibiting fuel to be dumped to the supply line during the pre-injection timing phase of operation.

Abstract: A plasma spray gun system with improved nozzle life. The gun includes a nozzle with a thin annular coolant passage and having a dimension optimized for nozzle life. The system also includes a deionizer to remove ions from the cooling fluid and a dissolved gas remover which also improves nozzle life. In addition, the coolant is treated to remove ions which extends nozzle life even more. Further cooling fluid treatment for even further nozzle life includes dissolved gas removal and heat removal.

Abstract: A manually manipulatable spray mechanism for connection to a supply apparatus having a source of molten asphalt under pressure for applying a sprayed coating of molten asphalt on selected areas of a paved surface. The spray mechanism is configured so that its asphalt spray pattern may be adjusted to suit the job being accomplished, and, to provide for recirculatingly returning the molten asphalt to the supply apparatus when the spray mechanism is in the inoperative or stand by state.

Abstract: A heavy duty plasma spray gun for extended industrial service is disclosed. The gun includes a gas distribution member made of a material having a coefficient of expansion different from that of the parts surrounding it. The gas distribution member is forcibly urged by a resilient member such as a coiled spring against a seal so as to assure the plasma gas is introduced into the gun arc in a manner only defined by the gas distribution member. The gun has liquid cooling for the nozzle (anode) and the cathode. Double seals are provided between the coolant and the arc region and a vent is provided between the seals which provides an indication when a seal has failed. Some parts of the gun are electrically isolated from others by an intermediate member which is formed as a sandwich of two rigid metal face pieces and an insulator disposed between them. The metal face pieces provide a rigid body to attach the remaining parts in proper alignment therewith.

Abstract: A unit injector (200,300,400,500) of the cam actuated, open nozzle type is disclosed including an extremely compact injector body (202,302,402,502) having a minimum number of internal flow passages and a two piece injector plunger (222,308,310,412,506,510) arranged to provide pressure/time metering (all embodiments), scavenging fuel flow (all embodiments), hydraulic timing (all embodiments), fuel cut off (all embodiments), wear compensation in advance timing mode (all embodiments) and sharp cut off of fuel injection without high "crush" loads and wear injection without high "crush" loads and wear compensation in retard and advance modes (embodiment of FIG. 3).

Abstract: An electrically controlled unit injector for a diesel engine wherein both timing of injection and the quantity of fuel premetered into the injector are controlled by a single solenoid. The control of the timing portion of the cycle is accomplished by a timing port of the valve which, when open, permits fuel to flow into the timing chamber and, when closed, operates against high pressure to shut off the flow of fuel from the timing chamber. The metering function is initiated by the upward travel of a metering plunger in response to the upward travel of a pumping plunger while the timing port of the valve is closed. Metering is terminated by a metering port of the valve which shuts off the supply of fuel to the metering chamber. The timing and metering ports of the valve are controlled by the single solenoid. Metering quantity control may be of the pressure-time or volumetric metering type.

Abstract: This device comprises a body provided with a bore in which a plunger is slidably mounted, this plunger is movable between a lower position in which it obturates injection nozzles provided through the bottom of the bore, and an upper position where it is spaced from the bottom. Metering means comprise a feed groove provided in the piston wall and opening on the tapered end thereof, this groove having an upper edge inclined to the piston axis. This upper edge co-operates with a fuel inlet port. A similar groove is provided in the piston wall, this groove having an inclined upper edge co-operating with a fuel discharge port. Fuel metering is achieved by rotation of the plunger about its axis.

Abstract: A unit injector (200, 300, 400, 500, 600) of the cam actuated, open nozzle type is disclosed including an extremely compact injector body (202, 302, 402, 502) having a minimum number of internal flow passages and a two piece injector plunger (222, 308, 310, 412, 506, 510, 606, 612) arranged to provide pressure/time metering (all embodiments), scavenging fuel flow (all embodiments), hydraulic timing (all embodiments), fuel cut off (embodiments of FIGS. 1, 3 and 4), wear compensation in advance timing mode (all embodiments) and sharp cut off of fuel injection without high "crush" loads and wear compensation in retard and advance modes (embodiment of FIG. 3).

Abstract: A unit injector (200, 300, 400, 500, 600) of the cam actuated, open nozzle type is disclosed including an extremely compact injector body (202, 302, 402, 502) having a minimum number of internal flow passages and a two piece injector plunger (222, 308, 310, 412, 506, 510, 606, 612) arranged to provide pressure/time metering (all embodiments), scavenging fuel flow (all embodiments), hydraulic timing (all embodiments), fuel cut off (embodiments of FIGS. 1, 3 and 4), wear compensation in advance timing mode (all embodiments) and sharp cut off of fuel injection without high "crush" loads and wear compensation in retard and advance modes (embodiment of FIG. 3).

Abstract: A cam driven fuel injector comprising: a body defining a bore; a driven or pumping piston reciprocatively situated with the bore; a metering piston reciprocatively positioned within the bore remote from the pumping piston; and a metering chamber defined in the bore below the metering piston. A spring is situated within a cavity or spring cage remote from the bore and a nozzle extends into the spring cage in biasing engagement with the spring to urge it to a closed position during non-injecting periods. The injector further including means for dumping the fuel within the metering chamber to the supply through the spring cage in correspondence with the motion of the metering piston; and for stabilizing the pressure force exerted on the nozzle, during the dumping portion of operation, by the fuel within the spring cage with the pressure force exerted on the nozzle.

Abstract: A fluid injector, for example for injecting liquid fuel into a combustion chamber, comprises a valve housing and an injector assembly which may be removably mounted on the valve housing. The injector assembly includes discharging means for discharging fluid from the injector assembly, ducting for conveying the fluid between the valve housing and the discharging means and a control valve movable to a first position in response to flow of the fluid in a first direction through the ducting to close the discharging means and return the fluid from the discharging means to the valve housing and movable to a second position in response to flow of the fluid in a second direction through the ducting to open the discharging means to allow at least some of the fluid conveyed to the discharging means to be discharged therefrom and to return any surplus fluid to the valve housing. Provided in the valve housing are inlet and outlet passages for conveying the fluid into and from the valve housing, and a change-over valve.

Abstract: A fuel injection system for internal combustion engines having a multiplicity of injection valves which serves to provide fuel supply is proposed. The fuel injection system includes a common, rigid fuel line, having plug nipples into which the injection valves associated with the individual cylinders of the engine can be inserted in a sealing manner. The fuel line comprises one fuel distributor line and one fuel return flow line located one above the other. Each injection valve has one inlet stub and one outlet stub disposed concentrically relative to one another, protruding into the plug nipple in such a manner that the inflow stub communicates with the fuel distributor line and the outflow stub communicates with the fuel return flow line. As a result, not only is it possible to provide simple sealing toward the outside between the injection valve and the plug nipple but also rapid assembly of the fuel injection system is assured.

Abstract: A fuel pump-injector unitary assembly comprises a plunger slidable in a bore and provided with a longitudinal passage-way, in combination with a metering ring surrounding the plunger and housed in an annular chamber of the injector body. The plunger is movable into a first or upper postion in which fuel is admitted into the lower part of the injector bore through an inlet port, and a second or lower position in which the tapered lower end of the plunger obturates fuel spray nozzles provided at the bottom of the bore. Fuel metering results from the cooperation of an inclined ramp of the ring with a fuel discharge duct transversely extending through the plunger and connected with the longitudinal passage-way thereof. Relative rotation of the metering ring and of the plunger permits adjustment of the injected fuel charge.

Abstract: A fluid injector, for example for injecting liquid fuel into a combustion chamber, comprises a valve housing and an injector assembly removably mounted on the valve housing. The injector assembly includes discharging means for discharging fluid from the injector assembly, ducting for conveying the fluid between the valve housing and the discharging means and a control valve movable to a first position in response to flow of the fluid in a first direction through the ducting to close the discharging means and return the fluid from the discharging means to the valve housing and movable to a second position in response to flow of the fluid in a second direction through the ducting to open the discharging means to allow at least some of the fluid conveyed to the discharging means to be discharged therefrom and to return any surplus fluid to the valve housing. Provided in the valve housing are inlet and outlet passages for conveying the fluid into and from the valve housing, and a change-over valve.

Abstract: The instant invention is directed to an injection nozzle for mixheads for the production of foams or solids from at least two flowable reaction components, comprising a nozzle housing with a nozzle needle guided in it which is provided with a positive control and cooperates with a nozzle opening, wherein a feed pipe and a return pipe end upstream of the nozzle opening in said nozzle housing and wherein said nozzle needle in its closed position connects said feed pipe and said return pipe to each other via a connecting channel, characterized in that said nozzle needle is divided into a needle core and a needle sleeve which surrounds said needle core and is guided on it, wherein said needle core cooperates with said nozzle opening and is pin-less in design and wherein said needle sleeve is provided with said connecting channel; and in that, when switching over from injection to return, said needle core is located in the closed position sooner than said needle sleeve in the return position, and when switching ov

Abstract: A swirl injection valve includes: a nozzle body including a hollow cylindrical body having a hole and a bottom portion on which a nozzle port and a valve seat are formed; a needle valve member, slidably inserted and reciprocally moved within the hole of the nozzle body, having a tip portion for seating on the valve seat and controlling the opening and closing of the nozzle port; a swirl chamber formed upstream of the nozzle port and defined between an inner wall of the nozzle body and an outer wall of the needle valve member; a fuel supply passage formed within the nozzle body and connected to a fuel supply source; and inclined passage comprising at least one short passage connected to the swirl chamber and the fuel supply passage and tangentially opened to the swirl chamber at a predetermined inclined angle. The fuel is tangentially supplied from the inclined passage to the swirl chamber without pressure loss.

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 nozzle unit includes a differential valve member biased by a spring to a closed position and opened to allow fuel flow through an outlet by fuel under pressure from an inlet. The spring is housed within a spring chamber and fuel leaking into this chamber is vented to the inlet when delivery of fuel has ceased. A relief valve is provided which has a valve element having a surface exposed to the pressure in the chamber and an opposing surface exposed to the pressure exterior of the nozzle unit. The valve element is biased to a closed position by a spring and it controls flow along a path from the chamber to the inlet. The flow path also incorporates a non-return valve. The valve element is set to lift from its seating at a pressure which is greater than the residual pressure in the inlet plus the pressure required to open the non-return valve.

Abstract: Fuel injection apparatus often uses valves which rapidly move in a start and stop motion for the purpose of starting and stopping injection. Undesirable inertial forces result from such start-stop movement of the valves. To limit such undesirable forces, a pair of valves (72,92) are provided for continuous rotation for starting and stopping injection.

Abstract: A vehicle mounted fluid spreading apparatus including a fixed spray bar having an extender spray bar mounted on each of the opposite ends thereof by means of swing joints so that each of the extender spray bars are movable about a single angularly disposed axis between extended and stowed positions. The spray bars and the swing joints have dual fluid flow passages formed therethrough so that fluid under pressure from a fluid supply is serially recirculated through the spray bars and swing joints back to the fluid supply when the apparatus is in a standby mode, and is sprayingly applied by actuator controlled self-adjusting nozzles mounted in the spray bars when the apparatus is in the operating mode.