Abstract: A sealing element for a fuel injector insertable into a receiving bore of a cylinder head of an internal combustion engine for direct injection of fuel into a combustion chamber of the internal combustion engine includes a sealing element surrounding a nozzle body of the fuel injector peripherally. The sealing element includes a base body having an axial recess through which the nozzle body extends. The base body also has an annular recess which communicates with the recess and into which the sealing element is introduced. At a first contact face, the base body is in at least indirect contact with an end face of the fuel injector, and at a second contact face opposite the first contact face, the base body is at least in indirect contact with a step of the receiving bore.

Abstract: An injector used for an internal combustion engine includes a valve needle which closes a fuel passage by being contacted on a valve seat and opens the fuel passage by separating from the valve seat, a coil and a magnetic core which are provided as a drive means of the valve needle, an anchor held in a relatively displaceable state with respect to the valve needle, a first biasing means biasing the valve needle in a direction opposite to a direction of a drive force, a second biasing means biasing the anchor in the direction of the drive force with a set load smaller than that of the first biasing means, and a restricting means restricting relative displacement of the anchor with respect to the valve needle in the direction of the drive force.

Abstract: A fuel injector includes a body, filter, and damper member. The body extends along a longitudinal axis between an inlet end and an outlet end with a flow passage extending therebetween. The filter is disposed in the flow passage proximate the inlet end. The damper member extends from a first terminus to a second terminus. The first terminus is proximal to the longitudinal axis, and the second terminus is distal to the longitudinal axis. The damper member extends from the first terminus about the longitudinal axis towards the second terminus in a generally circular path to define an aperture that permits fluid communication between inlet end and the filter. The damper member is secured to the flow passage between the inlet end and the filter. A damper member is also shown and described. A method of reducing sound in the valve group subassembly is also disclosed.

Abstract: A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The polymeric housing has a passageway extending between an inlet and an outlet along a longitudinal axis. The pole piece is disposed in the passageway. The metering assembly is secured to the polymeric housing proximate the outlet. The metering assembly has a guide member to guide a closure member through an aperture and along the longitudinal axis. The guide member may be cup-shaped and include offset apertures to allow fuel to travel along the passageway toward the outlet.

Abstract: A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The polymeric housing has a passageway extending between an inlet and an outlet along a longitudinal axis. The pole piece is disposed in the passageway. The metering assembly is secured to the polymeric housing proximate the outlet. The metering assembly has an O-ring disposed between a seat molded to a polymeric support member. The polymeric support member includes a peripheral portion bonded to the polymeric housing proximate the outlet. A method of sealing a fuel injector outlet end is described.

Abstract: A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The polymeric housing has a passageway extending between an inlet and an outlet along a longitudinal axis. The pole piece is disposed in the passageway. The metering assembly is secured to the polymeric housing proximate the outlet. The metering assembly has a seat molded to a polymeric support member. The polymeric support member may be cylindrical and bonded to the polymeric bore proximate the outlet. A method of operating the fuel injector is described.

Abstract: A fuel injector (1) for an internal-combustion engine has a shell (2) provided with two opposite terminal portions; the first terminal portion (4) has an inlet (7) for supply of the fuel and is generally designed to extend outside the engine, whilst the second terminal portion (5) has a nozzle (9) communicating with said inlet (7), is designed to be housed in the engine and has, in the radial direction, dimensions smaller than those of the first portion (4); the injector (1) further has an actuator (16) and a servo valve (15) housed in the first terminal portion (4); the servo valve (15) is provided with an open/close element (32), which can slide axially, under the action of the actuator (16) and substantially in a fluid-tight way, in a seat (27) and is subjected to an axial resultant of pressure of the fuel that is substantially zero; the fuel inlet (7) is made laterally in an intermediate axial position between the actuator (16) and the nozzle (9).

Abstract: A fuel injection valve includes a valve member, a first stop member, a second stop member, a movable core, a fixed core, and a coil. The valve member opens and closes an injection nozzle. The first stop member protrudes radially outward from said valve member. The second stop member protrudes radially outward from said valve member. The movable core is sandwiched between said first and second stop members. The movable core and one of said first and second stop members defines a fuel chamber. The fixed core is axially displaced from said movable core. The coil causes reciprocal axial displacement of said valve member such that said movable core axially reciprocates toward and away from said fixed core therewith.

Abstract: A fuel injector nozzle and method for dispersing fuel during a normal combustion operation and a supplemental combustion operation, the fuel injector nozzle comprising: a plurality of first outlet openings configured to disperse fuel in a first arrangement; and a plurality of second outlet openings configured to collide with the fuel passing through the plurality of first openings to disperse fuel in a second arrangement, wherein either the first or second arrangement is selected by the position of the piston.

Abstract: This fuel injection control device includes: a fuel injection valve; a piezoelectric element or a solenoid which drives the fuel injection valve; a fuel pump which pressurizes fuel and supplies it to the fuel injection valve; a magnetostrictive element which drives the fuel pump; and a magnetostrictive element driving coil which drives the magnetostrictive element; and the magnetostrictive element driving coil also serves as a voltage elevation coil for a drive circuit which drives the piezoelectric element or the solenoid.

Abstract: A fuel injector, in particular for the direct injection of fuel into a combustion chamber of an internal combustion engine, having a valve-closure member which cooperates with a valve-seat surface formed on a valve-seat body, to form a sealing seat, includes at least one spray-discharge orifice provided downstream from the sealing seat. The spray-discharge orifice has a guide region and an exit region arranged at its discharge-side end. The exit region widens in a stepped manner by at least one first step and/or at least in part continuously beginning with a transition from the guide region into the exit region. A fuel jet which emerges from the guide region at the transition and widens essentially uniformly at a jet angle, passes a discharge-side end of the exit region with a gap dimension of a gap after a distance s, the gap dimension being greater than zero and a first volume remaining in the exit region between the fuel jet and the inner walls of the exit region.

Abstract: A three-way valve having a valve chamber with a low-pressure port, a high-pressure port, and a control port is provided. The three-way valve also has a control valve installed in the valve chamber for closing one of the low-pressure port and the high-pressure port. A guide hole communicates with the valve chamber via the high-pressure port. A guide portion is slidably installed in the guide hole and moves together with the control valve. The guide portion further receives a fuel pressure at the high-pressure port in a closing direction of the high-pressure port. The control valve is driven by a piezoelectric actuator to open the low-pressure port and close the high-pressure port. The valve chamber communicates with an oil-accumulating chamber via a by-pass conduit. The oil-accumulating chamber is defined within the guide hole and is located opposite the guide portion from the valve chamber.

Abstract: A fuel injection device includes a fuel injection unit provided with a plurality of fuel injection members. The fuel injection unit is held by a holding-and-supplying unit. The fuel injection members are connected to the holding-and-supplying unit by a connecting-and-supplying unit. A fuel is supplied to the fuel injection members through fuel supply passages formed in the holding-and-supplying unit and the connecting-and-supplying unit so as to extend from the holding-and-supplying unit through the connecting-and-supplying unit to the fuel injection members.

Abstract: A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The housing has a passageway extending between an inlet opening and an outlet opening along a longitudinal axis. The pole piece is disposed in the passageway and has a through opening. The filter assembly has a portion disposed in the through opening of the pole piece. The coil assembly is disposed in the housing to surround the pole piece. The spring member is disposed partly in the pole piece and includes a spring portion contiguous with the portion of the filter assembly. The armature assembly is disposed in the passageway in a first position confronting the end face of the pole piece and in a second position contiguous to an end face of the pole piece. The metering assembly has a seat secured to a polymeric support member.

Abstract: A fuel injection valve for an engine includes a nozzle located in the vicinity of a cylinder head of the engine. The nozzle has nozzle holes each being opposed to an in-cylinder space defined in a cylinder of the engine. Each nozzle hole has an imaginary injection line that extends from each nozzle hole into the in-cylinder space. The imaginary injection line is directed toward either an upper surface of the piston or the wall surface of the cylinder. The in-cylinder space includes divided spaces each including the nozzle and at least one imaginary injection line. The divided spaces include a piston-side divided space and a head-side divided space. The head-side divided space contains fuel and air mixed at an air fuel ratio that is greater than an air fuel ratio of fuel and air in the piston-side divided space.

Abstract: The invention describes an injector device specifically designed for the injection of an alternative fuel such as LPG, methane, hydrogen or others, in an internal combustion engine. In the injector device, the shutter ensuring sealing in closing condition is separated with respect to the metering means with gauged hole, which perform the function of metering fuel during injection, and it is arranged downstream from said metering means. The shutter is controlled by a solenoid, which is again arranged on the downstream side with respect to said metering means.

Abstract: A fuel injector having an injection valve connected to a high-pressure source and a control valve including a control piston guided in a valve body and comprising a pressure piston section having a first pressure surface guided in a bush and a control piston section with a sliding seal that has a control edge; the bush is contained in a pressure chamber of the valve body. In a first valve position, a sealing seat of the control piston disconnects a valve chamber from a low-pressure/return system and in a second valve position, the control edge of the control piston disconnects the pressure chamber from the valve chamber; in the second valve position, a connection is simultaneously produced between the valve chamber and the low-pressure/return system, thus initiating an actuation of the fuel injection valve. The control piston section with the control edge is guided in a control cylinder that is contained in the pressure chamber of the valve body and is separate from the bush.

Abstract: A fuel injection valve has: a tubular body, a valve seat member, a valve body, a core tube, a bias spring, and an electromagnetic actuator. The core tube is press fitted into the tubular body. The core tube has a first end side opposing an absorption section of the valve body in such a manner as to form an axial gap interposed between the first end side of the core tube and the absorption section. The core tube has a second end side axially extending in the tubular body to a certain position on a way to the second end side of the tubular body. The axially extending second end side of the core tube has an outer periphery which is formed with a reduced diameter section for increasing an accuracy in positioning the core tube when the core tube is press fitted into the tubular body.

Abstract: A fuel injection valve has: a tubular body, a valve seat member, a valve body, a core tube, a bias spring, and an electromagnetic actuator. The core tube is press fitted into the tubular body. The core tube has a first end side opposing an absorption section of the valve body in such a manner as to form an axial gap interposed between the first end side of the core tube and the absorption section. The core tube has a second end side axially extending in the tubular body to a certain position on a way to the second end side of the tubular body. The axially extending second end side of the core tube has an outer periphery which is formed with a reduced diameter section for increasing an accuracy in positioning the core tube when the core tube is press fitted into the tubular body.

Abstract: An automatic recovery pilot nozzle support system for supporting a pilot nozzle in a fuel injection system of a turbine engine. The support system includes a sleeve extending from an orifice in a support housing, wherein the sleeve has a hollow opening for containing a pilot nozzle. The sleeve may increase the natural frequency of the pilot nozzle above an excitation zone, thereby limiting destructive vibrations. The sleeve may be attached to the support housing with an interference fit. The automatic recovery aspect of the support system enables the sleeve to maintain an interference fit with the support housing such that anytime the sleeve looses contact with the support housing, an insulative film of air forms between the sleeve and the support housing. The insulative film of air causes the temperature of the sleeve to increase, and the sleeve to expand and reform the interference fit with the support housing.

Abstract: The present invention provides a fuel injection valve which moves a needle valve (10) via a viscous fluid and a piston (7) by having an actuator (9) move a cylinder (3). The fuel injection valve comprises a sealing member (27) for sealing a gap between the cylinder (3) and piston (7), and a linking hole (29) formed in the piston (7) for connecting two chambers (5, 6) to each other. The size and/or shape of the linking hole (29) is set such that when a force for moving the cylinder (3) or piston (7) at a lower speed than the driving speed of the actuator (9) is generated due to differential thermal expansion between members, the viscous fluid moves between the two chambers (5, 6) through the linking hole (29), and when a force for moving the cylinder (3) at a higher speed than the force generated by the differential thermal expansion is generated by the actuator (9), the viscous fluid cannot pass through the linking hole (29).

Abstract: A dosing device comprises a housing (1) provided with an actuator, a dosing opening (8), a guiding shaft (6) which surrounds part of the valve needle (7) and forms a valve chamber (10) with the same, and a fluid chamber module (4) which is welded to the housing (1) in the form of a duct for guiding the valve needle (7) into the housing (9). The fluid chamber module (4) and the housing (1) are assembled along a separation surface (13) which is subjected to pressure by the dosing liquid and is formed almost only by axial cylinder wall surface parts (13) in order to reduce the pressure load on the weld seam (13).

Abstract: A fuel injector having a pressure booster whose booster piston separates a working chamber, which is continuously acted on with fuel by means of a pressure source, from a differential pressure chamber that can be pressure-relieved; a pressure change in the differential pressure chamber occurs via an actuation of a servo-valve whose control chamber can be pressure-relieved by an on/off valve that also opens or closes a hydraulic connection of the differential pressure chamber to a first return on the low-pressure side. In the deactivated state of the pressure booster, a first sealing seat seals a return on the low-pressure side off from a high-pressure region of the servo-valve, which region is comprised of the control chamber, a first hydraulic chamber, and a second hydraulic chamber.

Abstract: The fuel injection valve, for an internal combustion motor, has a valve body with injection openings (20) at its point. A valve needle has an axial movement within the valve body, with a conical needle point to give a selective blocking and release of the fuel flow through the injection openings. The point of the valve needle has recessed grooves matching each of the injection openings. The width of each groove matches the diameter of an injection opening, with a stepped contour and a curved cross section.

Abstract: A fuel injector includes a needle valve having a metering land that corresponds with the metering edge to define a metering gap. The metering gap produces a pressure drop utilized to tailor needle valve opening and closing response times.

Abstract: A method for producing a filter element includes forming longitudinal ducts extending between upstream and downstream surfaces of the filter element, and installing a heating element for heating regions of walls of the ducts along longitudinal extent of the walls. The filter element is arranged inside an injection valve of an internal combustion engine.

Abstract: A supplying unit supplies energy to an actuator so that the supplied energy is kept therein, making displacement the actuator. An interrupting unit interrupts the supply of energy to cause the actuator to discharge the kept energy, making displacement the actuator. A converting unit is adapted to convert the displacement of the actuator corresponding to the kept energy into hydraulic pressure applied to the valve member, moving the valve member to open the low pressure port and close the high pressure port. The convert unit converts the displacement of the actuator corresponding to the discharged energy into hydraulic pressure applied to the valve member, moving the valve member to open the high pressure port and close the low pressure port. Energy which the actuator requires to move the valve member so as to close the high pressure port is larger than energy which the actuator requires to move the valve member so as to open the low pressure port.

Abstract: In order to increase the lifetime for a piezoactuator of a fuel injector and to make possible a reliable seal of the piezoactor especially for comparatively thin head plates as well a gas exchange passage running through an actuator housing (52, 54) is provided, where a sealing unit (2) placed on the head arrangement (16, 18) is provided for sealing the piezoactor (12) which features a carrier (28) on which a sealing material (30) is arranged which forms a seal around the piezo contact pins (14) and the head arrangement (16, 18) and on which a microporous gas exchanger (26) to create gas permeability of the sealing unit (24) is integrated such that any fluid which has penetrated through to the gas exchanger (26) can flow out of the gas exchanger (26) under the force of gravity.

Abstract: A fuel injection valve includes a soundproofing cover molded out of a rubber-containing soft resin and arranged on the outer periphery of a metal casing. Collision noises and vibrations are absorbed by the soundproofing cover, achieving excellent sound insulation. Moreover, the rubber-containing soft resin is lower in cost, and can be shaped by injection molding, resulting in a reduction in manufacturing cost of the valve.

Abstract: When an engine is cold-started, the engine oil is quite viscous and requires larger passageways to flow through the engine than when the engine is warmed up and the engine oil flows readily. The present invention relates to a pin valve assembly which may be used on a fuel injector of an engine. The pin valve assembly of the present invention includes a movable shuttle which allows for a relatively large fluid flow space within the pin valve assembly when the engine is cold, and then moves to reduce the fluid flow space when the engine oil is less viscous and requires less room to flow as desired. Therefore, the advantages of a relatively large fluid flow space as well as a shorter pin travel distance within the pin valve assembly are both preserved.

Abstract: A fuel injector for an internal combustion engine has a nozzle body (36) provided with a nozzle bore (42), an inner valve (16) which is engageable with an inner valve seating (48) to control fuel delivery through one or more first nozzle outlets (38), and an outer valve (18) which is received within the nozzle bore (42) and engageable with an outer valve seating (48) to control fuel delivery through one or more second nozzle outlets (40). An actuator (14) for controlling movement of the inner and outer valves (16, 18) transmits an actuation force to the valves (16, 18) so as to permit either movement of the inner valve (16) only to provide a first injection state in which fuel is delivered through only the or each of the first outlets (38), or movement of the outer valve (18) only to provide a second injection state in which fuel is delivered through only the or each of the second outlets (40).

Abstract: An asymmetrical tool is provided to form an asymmetric orifice for an orifice disc. The asymmetric orifice is initially formed with a wall portion extending generally perpendicular to first and second generally parallel surfaces of the orifice disc. The wall of the orifice is deformed by the tool into an inlet portion contiguous to the first surface and a transition portion spaced from the first surface. The transition portion of the wall extends substantially perpendicular to the first and second generally planar surfaces. The inlet portion of the wall extends at a first oblique angle with respect to the first surface, and the first oblique angle varying with respect to the longitudinal axis. A method of forming the orifice with the tool is described.

Abstract: Metering components of a fuel injector that allow spray targeting and distribution of fuel to be configured using non-angled or straight orifice having an axis parallel to a longitudinal axis of the fuel metering components. Metering orifices are located about the longitudinal axis and defining a first virtual circle greater than a second virtual or bolt circle defined by a projection of the sealing surface onto the metering disc so that all of the metering orifices are disposed outside the second virtual or bolt circle within one quadrant of the circle. A channel is formed between the seat orifice and the metering disc that allows the fuel injector to generate a spray pattern along the longitudinal axis that forms a flow area on a virtual plane transverse to the longitudinal axis.

Abstract: Liquid fuel injectors are provided. The liquid fuel injectors allow the injection of a fine spray of liquid fuel. The liquid fuel injectors utilize a schrader valve movable between an open position and a closed position. When the schrader valve is in the closed position fuel flow is blocked and purge gas is allowed to flow through the fuel injectors. When the schrader valve is in the open position, the flow of purge gas is blocked and fuel is allowed to flow through the fuel injector. In this manner, the fuel injectors provide for an immediate and automatic purge of the fuel lines when the fuel flow is shut off.

Abstract: A fuel injector for the direct injection of fuel, especially into the combustion chamber of a mixture-compressing internal combustion engine having external ignition, is located in a cylinder head of the internal combustion engine in a receiving bore of the cylinder head, and includes a nozzle body and a sealing ring which seals the fuel injector from the cylinder head of the internal combustion engine. At an end on the discharge side of the fuel injector, an at least partially spherical body is formed which abuts at least partially against a wall of the receiving bore, a groove being circumferentially formed on the body in which the sealing ring is positioned.

Abstract: A fuel supply system, having a housing, in which a pistonlike element is disposed longitudinally displaceably in a bore and is guided sealingly in the bore by a guide portion. On one end, the guide portion adjoins a first fuel-filled chamber, and on its other end it adjoins a second fuel-filled chamber. At least one recess extending at least approximately in the circumferential direction is embodied in the guide portion of the pistonlike element and extends over at least part of the circumference of the pistonlike element and, viewed in the longitudinal direction of the pistonlike element, has an asymmetrical cross section.

Abstract: An piezoelectric actuated injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a preload chamber positioned along an injection control valve member for receiving high pressure fuel. The high pressure fuel acts on the injection control valve member to apply a preload force to supply a preload force to the stack of piezoelectric elements thereby ensuring more accurate control over fuel injection timing and metering.

Abstract: A deflector at the downstream end of a fuel tube deflects incoming fuel into an annular fuel channel in a fuel swirler of an injector. The deflector prevents direct impact of the cooler fuel on the exposed walls of the swirler body. The deflector can be formed by a tab or other integral portion of the heatshield, or as a separate piece fixed to the heatshield or swirler body. The deflector minimizes disruption of flow through any flow slots that are covered by the deflector, and may have i) a relatively small circumferential extent, such that the deflector covers only a few flow slots, ii) flow openings or slots that allow a portion of the fuel to flow inwardly of the deflector into the otherwise covered flow slot(s), or iii) a space or gap between the side(s) of the deflector and the inner walls of the annular channel.

Abstract: A fuel injector for the direct injection of fuel into the combustion chamber of an internal combustion engine includes a valve needle situated in a nozzle body, the valve needle being actuable by an actuator and acted upon by a restoring spring in such a manner that a valve-closure member which is in operative connection to the valve needle and faces the combustion chamber is kept in sealing contact with a valve-seat surface in the non-actuated state of the actuator. A first jet-opening angle ?1 is assigned to a first lift state of the valve needle and a second jet-opening angle ?2 to a second lift state of the valve needle.

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 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 includes a body, filter, and damper member. The body extends along a longitudinal axis between an inlet end and an outlet end and has a wall defining a flow passage extending therebetween. The filter is disposed in the flow passage proximate the inlet end. The damper member is secured to the flow passage between the inlet end and the filter. The damper member has outer and inner surfaces surrounding the longitudinal axis, the outer surface being contiguous to the wall of the flow passage to define at least one circumferential band about the longitudinal axis in the flow passage. The inner surface defines an aperture that extends through the damper member to permit fluid communication between the inlet end and the filter. A damper member is also shown and described. A method of reducing sound in the valve group subassembly is also disclosed.

Abstract: A high pressure unit fuel injector includes a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening. A valve cage includes a check-valve chamber adjacent the valve seat. The chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge. A disk is located within the chamber and has opposite first and second faces alternately seatable against the valve seat and the ledge respectively. The disk has a plurality of openings between the first and second faces and a circular-shaped groove formed in the first face about a center of the disk. The groove intersects the plurality of openings.

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 dual fuel injection valve separately and independently injects two different fuels and comprises a dual needle assembly with a hollow open-ended outer needle and an inner needle disposed within the hollow interior. A cap cooperates with the outer needle to cover the open end, and the outer needle and the cap together comprise the inner valve body. The outer and inner needles are each movable independently from each other between respective open and closed positions. A spring disposed between the cap and the inner needle contributes to biasing the inner needle in the closed position. The cap can be joined to the outer needle, whereby the cap can provide a limit to the movement of the inner needle. In another embodiment the cap can be detached from the outer body, allowing the spring to space the cap away from the outer needle, assisting with biasing the outer needle closed.

Abstract: A fuel injector (1) having a chamber (7) with a fuel inlet (8) and a plurality of fuel outlets (10), and including a fuel distributor (18) that is arranged in the chamber (7) for the purpose of distributing fuel introduced into the chamber (7) via the fuel inlet (8) to the outlets (10). The fuel distributor (18) includes a generally rotary symmetric distributor body (19).

Abstract: A fuel injector for spraying fuel into a combustion chamber comprises a spray head (6) extending along a central axis (X) from a base (6a) to a free end (6b), the head comprising a free outside face (6c, 6d) defining an internal injection combustion (6), and at least two groups (01; 20; 30) of injection orifices, each of the groups (10; 20; 30) of injection orifices comprising a first orifice (11; 21; 31) and at least one second orifice (12; 22; 32), each adapted to spray a fuel jet along a respective first and second directions (D11, D21, D31; D12, D22, D32), the first and second directions forming between them an acute angle (?). All of the internal openings of the injection orifices in each of the groups of orifices are situated substantially in a common plane (P) extending substantially transversely relative to the central axis (X) of the head (6) of the injector. The injector particularly intended for a direct-injection diesel engine.

Abstract: A fuel injection device, which has: a nozzle needle, guided displaceably in a nozzle body, which as a function of its position opens or closes at least one injection opening, in which a control chamber, to which fuel can be delivered under pressure via an inlet throttle and from which fuel can be diverted, controlled by a control valve, via an outlet throttle, is provided at a piston face of the nozzle needle facing away from the injection opening, and in which in operation, the position of the nozzle needle is controlled by a pressure difference between the pressure in the control chamber and the pressure of the fuel at the end, toward the injection opening, of the nozzle needle, is characterized in that the nozzle needle is surrounded, over at least part of its length, during operation by fuel at high pressure, such that only in the regions of the nozzle needle near the injection opening and in the control chamber can a lower pressure, differing from the high fuel pressure, occur.

Abstract: The injector tip of an injection valve which injects directly into the combustion chamber protrudes therein, thereby incurring the risk that combustion residues can become deposited on the injector tip. When the injection valve is in a closed state, the possible attachments of combustion residues along a separation line (10) are eliminated by means of a special configuration of the surface at the separation line (10) between the valve body and a valve plate. The surface is represented in a smooth, step-less, edge-less and curved manner.

Abstract: The present invention broadly applies to any fluid valve made up of a plurality of body components that create sealing lands where the body components are clamped together. The invention is further applicable to any such valves in which pressure differentials within the valve can cause fluid leakage in the region of these sealing lands. Fluid leakage is reduced by locating at least some of these sealing lands within a hollow clamp that holds the valve body components together. This clamping strategy that locates the clamping load where it is needed most is applicable to a wide variety of valves, but is particularly applicable to pressure control valves used in fuel injection systems that experience extremely high pressure differentials during their usage.