Abstract: Fuel injectors and methods of fuel injection allowing direct control of the flow of fuel at an intensified pressure to the needle. A valve, typically a spool valve, is placed in the fuel passage between the intensifier actuation piston and the needle, and controlled by a control valve which may be independent of the control valve controlling the coupling of actuation fluid and a vent to the intensifier actuation piston. This allows achievement of intensification before initiating injection, and control of multiple injections in a single injection event while maintaining fuel intensification throughout the duration of the injection event. Various embodiments are disclosed, including embodiments having multiple intensifiers, having control of pressure over the needle, having two stage control valve systems for control of intensifier actuation fluid, and combining control of one of the intensifiers and the valve controlling flow of intensified fuel to the needle for injection.

Abstract: Air assist fuel injectors having one or more inserts that guide movement of a poppet, and an air assist fuel injector having a solid poppet.

Abstract: A fuel supply method for a fuel injection device including a fuel injection unit, comprising: supplying fuel to a first fuel injection member of the fuel injection unit through a first fuel supply passage internally formed in a holding-and-supplying unit holding the fuel injection unit; and supplying fuel to a second fuel injection member of the fuel injection unit through a second fuel supply passage internally formed in the holding-and-supplying unit.

Abstract: A nozzle for a low pressure fuel injector that improves the control and size of the spray angle, as well as enhances the atomization of the fuel delivered to a cylinder of an engine.

Abstract: A fuel injection valve of an internal combustion engine for a vehicle is comprised of a nozzle plate which has a plurality of nozzle holes. Fuel injection jets are injected from the nozzle holes and collided with each other. The thickness of the nozzle plate is equal to or greater than the diameter of the nozzle holes.

Abstract: A fuel injection valve with a valve body in which a valve needle that has a longitudinal axis can slide in the longitudinal direction in a bore. The combustion chamber end of the bore is provided with a conical valve seat between the valve needle and the wall of the bore a pressure chamber is formed, which can be filled with fuel and extends to the valve seat. The valve needle has a valve sealing surface that cooperates with the valve seat in order to control at least one injection opening leading from the valve seat and contains an annular groove that extends in a radial plane of the valve needle. The downstream edge of the annular groove is embodied as a sealing edge and is hydraulically connected to the pressure chamber on a continuous basis.

Abstract: The present disclosure provides a self-cleaning injector nozzle or other fluid conduit that maintains deposits at a low level by sonic tuning the shock wave generated during fluid flow through that nozzle or conduit. Methods of producing an injector nozzle and a method of cleansing deposits from liquid or gaseous fluids are also disclosed.

Abstract: A fuel injector regulator having combined initial injection and peak injection pressure regulation. The fuel injector regulator includes a rate shaping valve movably supported within a valve bore between a closed position and an open position to regulate a rate of injected fuel. The regulator further includes a waste gate valve having a body movably supported within a bore of the rate shaping valve and between a closed position and an open position to regulate the pressure of injected fuel.

Abstract: A fuel injector including a tubular casing having an axial fuel passage. Disposed within the fuel passage are a valve seat element, a core cylinder, and a valve element axially moveably disposed therebetween and opposed to the core cylinder with an axial air gap. An electromagnetic actuator cooperates with the casing, the valve element and the core cylinder to form a magnetic field forcing the valve element to the open position against a spring between the valve element and the core cylinder upon being energized. The casing includes a reluctance portion producing an increased magnetic reluctance and allowing the magnetic field to extend to the valve element and the core cylinder through the air gap. The reluctance portion has a reduced radial thickness and an axial length extending over the air gap.

Abstract: A fuel injection system (18) is calibrated as an assembled system. The fuel injection system (18) includes a unit pump (10) a cam follower (24), a joined fuel injection line (14) and injection nozzle (16). The fuel injection system (18) is mounted to a test stand an is subsequently calibrated to a specified fuel delivery and timing. The relative positions of the unit pump (10) and fuel injection nozzle (16) are fixed during calibration. The assembled fuel injection system is packaged and delivered so that the calibrated system can be installed in the relative positions fixed during calibration.

Abstract: The invention relates to a device for actuating a control piston or nozzle needle (27) via a control chamber (26). The control chamber communicates via a control chamber line (25) with valve chambers (3, 22) of a 3/2-way valve (5). The valve body (6, 40, 51) of this valve is switchable by means of an actuator (11). By means of a restoring spring (14), the valve body (6, 40, 51) is acted upon such that a seat portion (7), embodied in the housing (4) on the valve body (6, 40, 51), is put into its valve seat (20). The valve body (6, 40, 51) of the 3/2-way valve (5) has a seat portion (7) and a longitudinal slide portion (8), as well as hydraulic faces (31,32), facing one another, that make the state of pressure equilibrium of the valve body (6, 40, 51) possible. The valve body (6, 40, 51) is moved to different stroke lengths (10; 23, 24) by means of an actuator (11).

Abstract: A fuel injector includes a seat, a movable member cooperating with the seat, and an orifice plate. The orifice disc includes a member having first and second generally parallel surfaces, and an orifice extending through the member between first and second generally planar surfaces of the member. The orifice is defined by a wall that couples the first and second surfaces. The wall includes first and second wall portions. The first wall portion is spaced from the first surface and extends substantially perpendicular to the first and second generally planar surfaces and about the longitudinal axis to define a transition perimeter. The second wall portion couples the first wall portion to the first surface to define a inlet perimeter on the first surface.

Abstract: A fuel injector for the direct injection of fuel into the combustion chamber of an internal combustion engine includes an actuator, which is encapsulated in a first sleeve and is sealed from an inner chamber of the fuel injector; a valve needle actuable by the actuator, which includes a valve-closure member cooperating with a valve-seat surface to form a sealing seat; and a locking spring, by which the valve needle is acted upon in such a manner that the valve-closure member is held in sealing contact at the valve-seat surface. An inflow-side end face of the first sleeve is dimensioned such that a linear deformation of the first sleeve, caused by the fuel pressure present at the inflow-side end face, is compensated by a linear deformation of the actuator and an activating piston extending the actuator.

Abstract: A fuel injection apparatus for injecting fuel into the combustion chambers of an internal combustion engine. includes a high pressure accumulator, a pressure booster, and a metering valve. The pressure booster includes a working chamber and a control chamber that are separated from each other by an axially movable piston. A pressure change in the control chamber produces a pressure change in a compression chamber that acts on a nozzle chamber via a fuel inlet. The nozzle chamber encompasses a nozzle needle. A nozzle spring chamber that acts on the injection valve element can be filled on the high-pressure side via a line that leads from the compression chamber and contains an inlet throttle restriction. On the outlet side, the nozzle spring chamber is connected to a chamber of the pressure booster via a line that contains an outlet throttle restriction.

Abstract: A fuel injection arrangement, which comprises a fuel source and a fuel nozzle connected thereto, including a fuel chamber and a needle valve arrangement in connection with the fuel chamber for controlling the fuel injection and an arrangement for bringing about a force effect on the valve of the needle valve arrangement in the closing direction thereof; a fuel control arrangement by means of the different switching positions of which, the fuel flow connection is connectable between the fuel source and the fuel chamber of the fuel nozzle as well as between the fuel source and the arrangement for bringing about a force effect, in which the fuel control arrangement comprises a mechanical force unit for changing its switching positions.

Abstract: A new fuel injecting device is comprised of a nozzle body formed a fuel supply hole in the center top end for injecting the fuel to a combustion chamber, a plurality of the spiral grooves and the edge grooves formed vertically and alternately on the outer peripheral surface of the lower portion. Each edge groove is positioned between two adjacent spiral grooves for supplying the fuel through the fuel supply hole. Each spiral groove and edge groove are formed a flow sectional area reduced gradually from inlet to outlet. A cylindrical shaped nozzle case is openable upward or downward and adapted to accommodate the nozzle body at a lower portion and the injector at an upper portion. The injector is positioned on the nozzle body and the injection hole is tightly secured onto the fuel supply hole of the nozzle body.

Abstract: A high pressure fuel supply apparatus 6 having: a plunger 161 reciprocating and sliding in a sleeve 160 of a high pressure fuel pump 16 so as to form a fuel pressurizing chamber 163 between the plunger 161 and the sleeve 160 to thereby discharge pressurized fuel; a tappet 164 reciprocated while abutting against the plunger 161; and a cam 100 abutting against the tappet 164 so as to reciprocate the tappet 164 and the plunger 161; wherein the tappet 164 has a recess portion 164a formed near a central portion of an abutment surface of the tappet 164 against the plunger 161.

Abstract: The invention relates to a common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, having an injector housing, which communicates with a central high-pressure reservoir and in which a nozzle needle is axially displaceable in order to adjust the injection as a function of the pressure in a control chamber, and having a sealing element, which is disposed in an annular chamber that is provided between a valve element and the injector housing. In addition to the sealing element, a support device is disposed in the annular chamber between the valve element and the injector housing.

Abstract: The invention relates to a valve, in particular a fuel injection valve for a high-pressure accumulator injection system of an internal combustion engine. Said valve comprises a valve body, provided with a valve body seat and a valve needle, guided over a guiding length in said valve body within a stationary circular cylindrical guiding surface and provided with a valve needle seat for controlling a spray orifice. According to the present invention, a pressure reservoir under high pressure, in the shape of an annular groove arranged coaxially in relation to the guiding surface, is provided in said valve body.

Abstract: A fuel injector for fuel-injection systems of internal combustion engines having a piezoelectric or magnetostrictive actuator, includes a hydraulic coupler which actuates a valve-closure member (3) formed on a valve needle. The valve-closure member cooperates with a valve-seat surface to form a valve-sealing seat. The coupler includes a master piston and a slave piston which are guided in bores of a guide sleeve. Located between the master piston and the slave piston is a pressure chamber filled with a hydraulic fluid. A corrugated tube is positioned around the guide sleeve which is sealingly joined to the master piston at one end and to the slave piston at the other end, and which seals a supply chamber for the hydraulic fluid from a surrounding fuel chamber.

Abstract: A fuel injection system for internal combustion engines with a fuel injector that can be supplied from a high-pressure fuel source has an injection valve, with injection nozzles pointing toward the combustion chamber, and coaxial inner and outer nozzle needles assigned to the injection nozzles are triggerable as a function of pressure to open and close various injection cross sections at the injection nozzles. Each of the nozzle needless is assigned a respective damping piston, and the damping pistons are movable relative to one another and act on a damping chamber which can be made to communicate with a low-pressure return system via an outlet throttle. In addition to the damping chamber, a closing chamber is provided, to which an end face of the outer nozzle needle is exposed in the closing direction.

Abstract: A fuel injector (1) for the direct injection of fuel into the combustion chamber of an internal combustion engine has a piezoelectric actuator (2) which is encapsulated in an actuator housing (3); a valve needle (9) which is in operative connection with the actuator and on which a valve-closure member (11) is formed which forms a sealing seat together with a valve-seat surface (13); and a nozzle body (12) into which the actuator housing (3) is able to be inserted. The actuator housing (3) and the nozzle body (12) are sealed by a common connecting part (4), the connecting part (4) having a first and a second diameter step (19; 20).

Abstract: A fuel injector nozzle assembly includes an injector body including a valve seat with a supply passage through which fuel flows generally along a supply axis. The valve seat presents an upper surface which is adapted to engage a valve to seal the supply passage. A nozzle plate is mounted onto the valve seat and includes a plurality of orifice holes therein through which fuel flows. The valve seat further includes a first edge protrusion protruding into the fuel flow for generating a first separation of the fuel flow, thereby creating a plurality of small eddies which are entrained within the fuel flowing adjacent thereto. A turbulence cavity is defined by the nozzle plate and the valve seat wherein fuel flows into the turbulence cavity through the supply passage and out from the turbulence cavity through the plurality of orifice holes.

Abstract: A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, including a piezoelectric or magnetostrictive actuator, which, via a valve needle, actuates a valve-closure member arranged on the valve needle, the valve-closure member cooperating with a valve-seat surface to form a sealing seat, the fuel injector having an hydraulic compensation chamber. A pressure piston cooperates with the compensation chamber, which is filled with hydraulic fluid via an hydraulic fluid inlet. The actuator is arranged between the pressure piston and the valve needle and displaceable in the axis of the valve needle and the pressure piston.

Abstract: A fuel injector has a fuel inlet, and a metering valve which is activated by an electromagnetic actuator to open and close an injection nozzle; the metering valve has a control chamber communicating with the inlet and defined by an end wall, in which is formed an outlet hole closed by a shutter moved along an axis by the actuator; the end wall and the shutter are defined by respective parallel, facing surfaces which rest against each other to compress the film of fuel issuing from the hole during closure by the shutter, and which have channeling formed about the hole to generate, in use, a counterpressure for the outflowing fuel.

Abstract: An assembly for a fuel injector having a metallic armature and a metallic poppet attached to the armature at an interface location. The armature and/or the poppet includes a coating at the interface location, where the coating has a higher resistance to corrosion as compared to the base material of the poppet and/or the base material of the armature.

Abstract: A fuel injection valve for internal combustion engines, having a housing in which an outer valve needle and an inner valve needle guided in it are disposed in a bore. The outer valve needle controls an outer row of injection openings, and the inner valve needle controls an inner row of injection openings, to which rows of injection openings fuel is delivered at an injection pressure through a high-pressure conduit embodied in the housing. A control pressure chamber in the housing can be made to communicate with the high-pressure conduit, and by means of its pressure, a closing force is exerted at least indirectly on the inner valve needle. The high-pressure conduit communicates with a control chamber, by whose pressure a closing force is exerted at least indirectly on the outer valve needle, and the control chamber communicates with the control pressure chamber. A control valve is disposed in a housing, and by means of the control valve, the control chamber can be made to communicate with a leak fuel chamber.

Abstract: Disclosed is a device for increasing entrainment and mixing in an air/fuel zone of a direct fuel injection system. The device comprises an ejector nozzle in the form of an inverted funnel whose central axis is aligned along the central axis of a fuel injector jet and whose narrow end is placed just above the jet outlet. It is found that effective ejector performance is achieved when the ejector geometry is adjusted such that it comprises a funnel whose interior surface diverges about 7° to about 9° away from the funnel central axis, wherein the funnel inlet diameter is about 2 to about 3 times the diameter of the injected fuel plume as the fuel plume reaches the ejector inlet, and wherein the funnel length equal to about 1 to about 4 times the ejector inlet diameter. Moreover, the ejector is most effectively disposed at a separation distance away from the fuel jet equal to about 1 to about 2 time the ejector inlet diameter.

Abstract: An apparatus and method of compensating for thermal expansion and tolerance variations (wear, brinelling, mounting distortion) in a fuel injector is provided. The apparatus includes a magneto-hydraulic thermal expansion compensator containing magnetically-active fluid positioned in operative contact with the fuel injector actuation element. A electromagnetic coil is provided proximate the magneto-hydraulic compensator. Magnetic flux generated by the electromagnetic coil causes the viscosity of the magnetically-active fluid within the magneto-hydraulic compensator to increase, causing the magneto-hydraulic compensator to become substantially rigid during actuation of the fuel injector.

Abstract: Disclosed is a fuel injection valve for internal combustion engines having a valve body in which a hollow valve needle is disposed longitudinally displaceably in a bore. The hollow valve needle, on its end toward the combustion chamber, has a conical valve sealing face, which cooperates with a conical valve seat disposed on the end of the bore toward the combustion chamber. A longitudinal bore is embodied in the hollow valve needle, and a valve needle is disposed in it and, with a valve contact face embodied on its end toward the combustion chamber, likewise cooperates with the valve seat. The tip of the hollow valve needle toward the combustion chamber is formed by a chamfer.

Abstract: A solenoid end cap assembly having a flat mating surface. The flat mating surface is a single planar mating surface and is designed to mate with a substantially flat mating surface of a valve control body. The solenoid, housed within the solenoid end cap, does not protrude past the flat surface and may form part of the substantially flat mating surface of the solenoid end cap. The flat mating surfaces of the valve control body and the solenoid end cap assembly eliminates the need for ring dowels in the assembly between the solenoid and the valve control body. This reduces manufacturing costs and assembly time. The flat mating surfaces also provide a uniform mounting surface for the solenoid from injector to injector. This increases performance characteristics, as well as increases thermal conductivity and magnetic conductivity characteristics.

Abstract: A fuel injection valve, for an engine, comprising a nozzle body having a plurality of nozzle holes and a needle valve reciprocated in the nozzle body for controlling the inflow of the fuel into the nozzle holes is disclosed. The fuel is rendered to flow into the nozzle holes from a direction along the inner wall surface of the nozzle body around each of the nozzle holes in a first inflow mode, and from a direction substantially perpendicular to the inner wall surface of the nozzle body in a second inflow mode. The first inflow mode and the second inflow mode can be selectively switched to each other. The fuel is rendered to flow into the nozzle holes in the first inflow mode before the lapse of a predetermined time after the engine is started, and in the first or second mode as required after the lapse of the predetermined time.

Abstract: An injection valve for an internal combustion engine including at least a nozzle body, in which a nozzle needle is guided axially displaceably, and an at least one-piece retaining body, in which means for actuating the nozzle needle are disposed. On its circumferential surface, the nozzle body has means for engagement of a centering tool.

Abstract: A fuel injection valve for fuel injection valve systems of internal combustion engines is described, having an energizable actuating element, a valve closing element which is axially movable along a valve longitudinal axis and which works in conjunction with a rigid valve seat that is provided on a valve seat element so as to open and close the valve, and at least one exit opening that is provided downstream from the valve seat. As the injection valve is of the inward-opening type, the opening movement of the valve closing element is oriented away from the exit opening and the closing movement of the valve closing element is oriented toward the exit opening. Fuel flows completely through the interior of the valve closing element, and the valve seat element has an inner trough-shaped recess, so that the opening movement of the valve closing element is fuel-pressure-assisted, due to a flow inversion upstream of the valve seat.

Abstract: In a fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, a piezoelectric or magnetostrictive actuator is surrounded by a compensation sleeve. The compensation sleeve is made of a material exhibiting virtually no, or negative, thermal expansion, so that the thermal expansion of the compensation sleeve and that of an upper valve-body section and/or lower valve-body section essentially corresponds to the thermal expansion of the actuator and effective transmission elements to the valve-sealing seat. The compensation sleeve, radially on the outside, is enclosed by a spring sleeve, which connects the lower valve-body section to the upper valve-body section and prestresses the compensation sleeve for pressure.

Abstract: A fluid control valve assembly controls the flow of actuation fluid to and from a fuel injector. The fluid control valve assembly includes at least one solenoid actuator attached to a valve body. The solenoid actuator includes a stator and an armature comprised of a soft magnetic material. At least one of the armature and the stator include an impact surface. The impact surface is coated with a relatively hard, nonmagnetic material coating. Thus, the relatively hard, nonmagnetic material coating will protect the relatively soft, magnetic material comprising the stator and the armature, and increase the durability of the solenoid actuator and the fluid control valve assembly.

Abstract: A fuel injection system having a high-pressure fuel pump and a fuel injection valve connected to it for each cylinder of the internal combustion engine. A pump piston of the high-pressure fuel pump delimits a pump working chamber that is connected to a pressure chamber of the fuel injection valve, which has an injection valve element that controls injection openings and can be moved in an opening direction counter to a closing force by the pressure prevailing in the pressure chamber. A first control valve controls a connection of the pump working chamber to a relief chamber and a second control valve controls a connection of a control pressure chamber which communicates with the pump working chamber, to a relief chamber. A throttle restriction is respectively provided in connections of the control pressure chamber to the pump working chamber and the relief chamber.

Abstract: An injector housing (1) of the injector has an indentation (2) in which a part of an actuator housing (4) of the injector is located. A floor of said indentation (2) is formed by a peripheral support surface (3) for the actuator housing (4). A bottom surface of the actuator housing (4) is oriented towards the support surface (3) and has a peripheral recess (11). This recess (11) is such that the bottom surface of the actuator housing (4) has at least one peripheral projection (12), which is oriented towards the support surface (3) and is adjacent to the support surface (3). A seal (13) for preventing leakage along interfaces between the injector housing (1) and the actuator housing (4) is locate din the recess (11) and is adjacent to the support surface (3).

Abstract: Common rail fuel injectors typically have difficulty in changing an injection rate during an injection event. Fuel injectors for this common rail fuel injection system include a multi-position admission valve. The admission valve is stoppable at a middle position to inject fuel at a low rate. The lower rate is accomplished by leaking some fuel to drain to reduce injection pressure. The admission valve is also stoppable at a fully open position to inject fuel at a high rate. Fuel injection events are ended, and the fuel injectors maintained between injection events, with the admission valve member in contact with a supply seat to close the high pressure supply passage. This strategy can be used in conjunction with a spring-biased needle valve member to expand fuel injector capabilities.

Abstract: A nozzle holder includes a support portion, which supports a downstream end surface of a planar wall of an injection hole plate. The injection hole plate provided with injection holes is welded to one of the valve body and the nozzle holder. The planar wall may be curved and may be thus convex in an upstream direction toward a downstream end opening such that the planar wall is urged against a peripheral edge of the downstream end opening of the valve body. The planar wall may include a reinforcing rib located radially outward of the injection hole.

Abstract: A thin film coating for a low allow steel or tool steel components in a fuel injector (14), such as a fuel injector needle valve (86) is disclosed. A thin film coating (96) consists of a metal carbon material layer less than 2.0 microns thick applied to a low alloy steel substrate (95) or tool steel substrate (95) used in fuel injector components, such as the fuel injector needle valve (86) or a portion thereof. Optionally, a thin bond layer (98) of chromium is deposited between the steel substrate (95) and the primary metal carbon material coating (96). The thin film coating (96) minimizes abrasive and adhesive wear associated with the needle valve (86) and cooperating nozzle surfaces (62,63) of the fuel injector (14).

Abstract: A modular fuel injector that includes a coil group subassembly and a valve group subassembly. The coil group subassembly is independently testable. The valve group subassembly is independently testable and includes a tube assembly having a longitudinal axis extending between a first tube end and a second tube end, and a seat assembly disposed in the tube assembly proximate the second tube end. The seat assembly includes a flow portion and a securement portion. The flow portion extends along the longitudinal axis between a first surface and an orifice disk retention surface at a first length. The flow portion has a seat orifice extending therethrough and an orifice disk coupled to the orifice disk retention surface so that the orifice plate is aligned in a fixed spatial orientation with respect to the flow portion. The securement portion extends along the longitudinal axis away from the orifice disk retention surface at a second length greater than the first length.

Abstract: A fuel injector (1), in particular a fuel injector (1) for fuel injection systems, includes a first solenoid (2) cooperating with an armature (3), a second solenoid (4) cooperating with the armature (3), and a valve needle (13) friction-locked to the armature (3) for actuating a valve closing body, a force being exertable on the armature (3) in a closing direction using the first solenoid (2) and in an opening direction using the second solenoid (4).

Abstract: A fuel swirler positioned upstream of an injection orifice is disposed at the tip of a nozzle body in a fuel injector, in which the fixed core and the nozzle body are coupled to each other via a non-magnetic cylindrical seal ring press-fitted and welded to the outer circumference of one end on the nozzle body side of the fixed core and the inner circumference of one end of the nozzle body. The inner circumference of the fuel swirler and the inner circumference of the seal ring function serve as a guide for slidably guiding a stroke movement of the needle. The fuel swirler is held between the receiving surface of the nozzle body and the orifice plate, thus defining an annular fuel passage between the outer circumference of the fuel swirler and the inner circumference of the nozzle body, so that fuel flows into a passage groove formed at the lower end surface of the fuel swirler via the annular fuel passage.

Abstract: A fuel injection valve for internal combustion engines, having a housing with a bore inside it that contains a longitudinally sliding outer valve needle which in turn contains a longitudinally sliding inner valve needle and the end of each valve needle oriented toward the combustion chamber controls at least one injection opening. The pressure in a control pressure chamber at least indirectly exerts a closing force on the outer valve needle and the pressure in a control pressure chamber at least indirectly exerts a closing force on the inner valve needle. The housing contains a control valve that has a valve chamber and a valve element contained in it, wherein the valve chamber has a connection to the leakage oil chamber a continuously open connection to the control chamber and a connection to the control pressure chamber.

Abstract: A fuel injector for a gas turbine engine includes a bulkhead having adjacent angled wall segments, each of which includes an injector opening. Fuel injectors are supported by the bulkhead on adjacent wall segments. Each fuel injector includes an inlet fitting including ports for receiving fuel, a feed stem extending through the opening, and a manifold supported at the downstream end of the feed stem and including a plurality of manifold segments. Each manifold segment includes a plurality of nozzles arranged in a linear, planar array; with each nozzle including a fuel distribution assembly and an air swirler assembly. The manifold segments are supported at angles to one another, such that that the sprays from one array of nozzles in one segment are provided in a different direction than the sprays from another array of nozzles in an adjacent manifold segment.

Abstract: A fuel injector (1) for direct injection of fuel into the combustion chamber of internal combustion engines having an actuator (10), a valve needle (3) operable by the actuator (10) for actuation of a valve closure member (4) which, together with a valve seat face (6) on a valve seat member (5), forms a sealing seat, and at least one spray discharge orifice (7), which is formed downstream from the valve seat (6). A flame protection cone (34) is provided on a downstream end (35) of the fuel injector (1).

Abstract: A fuel injector, in particular for the direct injection of fuel into a combustion chamber of an internal combustion engine, includes a valve needle at whose discharge-side end a valve-closure member is positioned, which cooperates with a valve-seat surface, formed at a valve-seat member, to form a sealing seat. A spray-discharge orifice calotte connected to the valve-seat member of the fuel injector, or integrally formed in one piece with it, has at least three spray-discharge orifices not all extended axes of the spray-discharge orifices intersecting.

Abstract: A high-pressure fuel system including a housing having first and second high-pressure bodies (3, 5), which contact one another at a contact face. A high-pressure chamber in the housing passes through the contact face, and at least intermittently a high fuel pressure is present in the chamber (23). A wall part having a longitudinal axis surrounds the housing at least in the region of the contact face, so that a leak fuel chamber (32) is formed between the wall part and the housing which chamber is sealed off from the outside.

Abstract: A fuel injector for fuel-injection systems of internal combustion engines includes an actuator, a valve needle, which is able to be activated by the actuator to actuate a valve-closure member, which, together with a valve-seat surface formed at a valve-seat member, forms a sealing seat; and at least one spray-discharge orifice which is formed in the valve-seat member. At a downstream end of the fuel injector, a flameproofing screen is positioned, which shields the spray-discharge orifices from the combustion chamber of the internal combustion engine.