Abstract: A fuel injector with a direct needle control for an internal combustion engine, having an actuator, a hydraulic booster, and a nozzle needle guided in a nozzle body and acting on a nozzle needle sealing seat. The hydraulic booster includes a booster piston connected to the actuator and a nozzle needle booster piston connected to the nozzle needle; a booster chamber in the form of an actuator coupler chamber is associated with a pressure surface of the actuator booster piston; and depending on the pressure in the actuator coupler chamber, the nozzle needle is lifted away from the nozzle needle sealing seat, thus initiating an injection. In addition to the actuator booster piston, a control element is provided that is able to execute a stroke motion, is hydraulically coupled to the actuator coupler chamber by means of a first control surface, and is associated with a control chamber by means of a second control surface.

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 injector incorporates a flow control into the needle valve and valve body to regulate fuel flow through the injector. The flow control defines an initial pilot fuel flow path that is closed by needle valve movement away from the nozzle seat. A primary fuel flow path requires axial movement of the needle valve through a mid-range position in which neither fuel flow paths are open. At low engine speeds, the needle valve is not driven through its mid-range position and closes prior to being driven to its fully open position, resulting in a pilot injection. At higher engine speeds, the needle valve is driven through its mid-range position eliminating a distinct pilot injection to provide only rate shaping.

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: 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 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: 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 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 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: A fuel injection valve for internal combustion engines, with a housing that contains a moving valve element whose movement counter to the elastic force of a spring element controls the fuel supply to the combustion chamber of the engine. The spring element has the form of a cylindrical sleeve whose wall contains openings at a number of locations that allow the spring element to be elastically deformed in the longitudinal direction.

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: A fuel injection valve for internal combustion engines includes a valve body (1) in which a bore (5) is defined in one end, in which a first row of injection openings (20) and a second row of injection openings (22) are formed. In the bore (5), an outer valve needle (8) cooperates with the valve seat (18) for controlling the first row of injection openings (20); between the outer valve needle (8) and the wall of the bore (5), a pressure chamber (14) is formed. In the outer valve needle (8), an inner bore (11) is formed, in which an inner valve needle (10) is located and which cooperates with the valve seat (18) for controlling the second row of injection openings (22). A pressure shoulder (30) is formed on the inner valve needle. A hydraulic opening force is exerted on the inner valve needle (10); by its opening stroke, the outer valve needle (8) opens a throttle connection (32) from the pressure chamber (14) to the pressure shoulder (30) of the inner valve needle (10).

Abstract: A fuel injector includes a homogenous charge nozzle outlet set and a conventional nozzle outlet set controlled respectively, by first and second needle valve members. The homogeneous charged nozzle outlet set is defined by a nozzle insert that is attached to an injector body, which defines the conventional nozzle outlet set. The nozzle insert is a one piece metallic component with a large diameter segment separated from a small diameter segment by an annular engagement surface. One of the needle valve members is guided on an outer surface of the nozzle insert, and the nozzle insert has an interference fit attachment to the injector body.

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 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 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 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: 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 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 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 dual mode fuel injector having first (15) and second (30) valve members. The valve members are actuatable independently of one another and are arranged to open in opposite directions. The valve members control the flow through first (18) and second (29) orifices, one of which injects the fuel at a narrow angle with respect to the injector axis, and the other of which injects the fuel at a wider angle with respect to this axis.

Abstract: A fuel injection valve with a valve body that contains a bore delimited at its end oriented toward the combustion chamber by a valve seat and whose end region oriented toward the combustion chamber has at least one injection opening. A piston-shaped valve needle is contained in the bore in a longitudinally sliding fashion and has an essentially conical valve sealing surface by means of which the valve needle cooperates with the valve seat in order to control the at least one injection opening. The valve seat has a first conical partial surface and a second conical partial surface wherein the second conical partial surface is disposed downstream of the first conical partial surface and is raised in relation to it.

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: An injection nozzle (10), for use in a fuel injector for an internal combustion engine, has an inner valve needle (26) which is engageable with an inner valve seating (24, 58) to control fuel delivery through one or more first nozzle outlets (14), and an outer valve (28) which is engageable with an outer valve seating (24, 70) to control fuel delivery through one or more second outlets (16). The outer valve (28) is provided with a valve bore (36) within which at least a part of the inner valve needle (26) is received. Coupling means (46, 48) are provided for coupling movement of the inner valve needle (26) to the outer valve (28) in circumstances in which the inner valve needle (26) is moved away from the inner valve seating (24, 58) through an amount exceeding a predetermined threshold amount (D). This allows the outer valve (28) to be lifted away from the outer valve seating (24, 70) to provide an increased injection rate.

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: 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: A fuel injector having a nozzle with improved cooling including a retainer and a nozzle housing received therein. The nozzle housing includes a nozzle shank, an outer peripheral surface and at least one injection hole at a tip of the nozzle shank. The nozzle shank is positioned in a nozzle support portion of the retainer. In one embodiment, the outer peripheral surface of the nozzle shank is tapered, and the inner peripheral surface of the nozzle support portion is correspondingly tapered and sized to engage the outer peripheral surface of the nozzle shank along a tapered interface. In another embodiment, the inner peripheral surface of the nozzle support portion has a diameter smaller than a diameter of the outer peripheral surface of the nozzle shank so that an interference fit exists at a seal interface.

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 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 device for supplying fuel at high pressure to an internal combustion engine, having a pistonlike element which is disposed longitudinally displaceably in a bore of a component. The pistonlike element is guided with a sealing portion in a guide portion of the bore, and the guide portion discharges at one end into a pressure chamber that can be filled with fuel at high pressure and at the other end into a leak fuel chamber. At least one channellike recess is embodied on the sealing portion of the pistonlike element, or the guide portion and this recess communicates hydraulically with the pressure chamber and is sealed off from the leak fuel chamber, except for the annular gap formed between the pistonlike element and the inner wall of the guide portion, and as a result the pistonlike element is hydraulically centered in the bore.

Abstract: A fuel-injection nozzle for an internal combustion engine is disclosed. The nozzle comprises a nozzle body (2), in which a nozzle needle (10) with a stop (34) is positioned so that it can be displaced, and a nozzle holder (6), in which a pressure pin (16) is displaceably mounted. A disc-shaped stop element (26) is provided in a zone between the nozzle body (2) and the nozzle holder (6). The nozzle body (2) and the nozzle holder (6) are axially braced against one another in such a way that the stop element (26) forms a first sealing surface (30), which lies adjacent to one section (23) of the nozzle holder and a second sealing surface (31), which lies adjacent to one section (24) of the nozzle body. Both the first and second sealing surfaces (30, 31) respectively have at least one cavity (36), which is punched, drilled and/or stamped.

Abstract: Fuel injector having a sleeve-shaped connector (22), injection nozzle (12) and injection line (14).

Abstract: A valve having a valve needle axially displaceable in a bore of a valve body and which has a conical valve needle tip having a radial valve sealing face, which in the closing position comes to rest on a conical inner wall of the valve body on the closed end of the bore. In the inner wall of the valve body there is at least one opening which connects the bore with the outside of the valve body. The valve includes two radial recesses disposed in the valve needle tip or in the inner wall of the valve body, and one of the radial recesses is located upstream and the other radial recess is located downstream from the position of the valve sealing face, in the closing position of the valve.

Abstract: A fuel injector for internal combustion engines, includes a base body, an injection housing and a fastening device. The fastening device includes at least one lock nut with an annular land and an annular shoulder on the injection housing. By means of the fastening device, the injection housing is braced axially against the base body. A fuel inlet and at least one valve element are also provided. To improve the seal between the base body and the injection housing, the fastening device has at least one annular face which is oriented toward the annular land of the lock nut and is curved convexly in the manner of a spherical-segmental face.

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: A fuel injector for fuel injection systems of internal combustion engines includes a nozzle body. At a downstream end of the nozzle body at least one spray discharge opening is arranged. A sealing element is arranged on the nozzle body for sealing with respect to a contiguous component. At least one circumferential sealing ridge that forms a press fit with a contiguous component is arranged on the nozzle body as the sealing element.

Abstract: An injection valve for an internal combustion engine, including a valve control piston, a valve control chamber with an inlet throttle and an outlet throttle for actuating the valve control piston, a valve control unit, actuated by means of a piezoelectric actuator unit for controlling the valve control chamber, which valve control unit is embodied in valvelike fashion and has a valve closing member cooperating with at least one valve seat. To assure a high closing speed of the valve closing member, the valve closing member and the at least one valve seat are disposed in the valve control chamber.

Abstract: A common rail injector is proposed which is very compact in structure and nevertheless brings high closing forces to bear at the end of the injection. This is attained, among other provisions, in that the closing piston has a larger diameter than the nozzle needle.

Abstract: A fuel injection valve having a valve retaining body, which has a longitudinal axis and in which a central spring chamber is embodied. In this spring chamber, a closing spring is disposed, which transmits a closing force to a valve member, which valve member cooperates with a valve seat for controlling at least one injection opening. In the wall of the spring chamber, an inlet conduit extends parallel to the longitudinal axis of the valve retaining body, and by way of this conduit, fuel at high pressure can be delivered to the at least one injection opening. The cross section of the inlet conduit has a greater length in the circumferential direction than in the radial direction, so that the wall region between the inlet conduit and the spring chamber, or the outer jacket face of the valve retaining body, is larger than in the case of an inlet conduit with the same size of cross-sectional area and a circular cross-sectional contour.

Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a valve needle and a valve closing body, which is operationally linked to it and cooperates with a valve seat face situated in a valve seat body to form a sealing seat. Upstream from the sealing seat there is at least one swirl channel, which has a tangential component relative to the longitudinal axis of the fuel injector. An axial channel, which is formed between the valve closing body and the guide recess of the valve seat body, has an axial component relative to the longitudinal axis of the fuel injector, the axial channel being formed between the guide recess and at least one flattened area on the valve needle.

Abstract: An injector for a fuel injection system for internal combustion engines is proposed, whose system pressure supply is integrated with the injector. This results in a simple design with at the same time a low requirement for driving capacity on the part of the high-pressure pump for supplying system pressure.

Abstract: A method of directly setting an injector lift that involves the provisioning of a valve body having an uniform internal diameter, inserting a sleeve assembly to a predetermined distance and securing the sleeve assembly. The apparatus includes a sleeve, a lower armature guide and a seat, all of which can be integral so as to facilitate the setting of the injector lift. The sleeve assembly is press-fitted and secured by known attachment techniques.

Abstract: A fuel injection system having one high-pressure fuel pump and one fuel injection valve communicating therewith for each engine cylinder. A piston of the fuel pump defines a work chamber which communicates with a pressure chamber of the fuel injection valve, which valve has an injection valve member by which injection openings are controlled, and which valve is movable 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 work chamber to a relief chamber and a second control valve controls, a connection of a control pressure chamber, communicating with the pump work chamber and defined by a control piston, to a relief chamber.

Abstract: A fuel injection system for an internal combustion engine with direct injection includes a fuel injection device which can inject the fuel directly into a combustion chamber of the engine has a valve element bordering on a work chamber, and the position of the valve element depends on the pressure in the work chamber. A pressure booster piston borders on a control chamber on one side and on a high-pressure chamber on the other. A fuel supply can subject the control chamber to various pressures. The pressure booster piston is integrated with the fuel injection device and that the high-pressure chamber is integrated with the work chamber.

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 that has at its injector end a valve-closure member that works together with a valve-seat surface formed on a valve-seat member, to form a sealing seat. The fuel injector also includes at least one swirl duct; a swirl chamber formed on the valve-seat member, and a plurality of injection openings that open out from the swirl chamber, through which the fuel, provided with a swirl, is simultaneously injected. The at least one swirl duct is formed in the valve-seat member or in a swirl disk adjacent to the valve-seat member.

Abstract: A fuel injector that allows 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 subassembly. Metering orifices are located about the longitudinal axis and defining a first virtual circle greater than a second virtual 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 circle. The projection of the sealing surface converges at a virtual apex disposed within the metering disc. At least one channel extends between a first end and second end. The first end is disposed at a first radius from the longitudinal axis and spaced at a first distance from the metering disc.

Abstract: A fuel injector, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, is equipped with a valve-closure member which together with a valve-seat surface that is formed on a valve-seat body constitutes a sealing seat, with an ejection orifice and with a swirl module. The swirl module incorporates a plurality of tubular hollow bodies which are disposed parallel to one another in a cluster and which impart turbulence to the fuel flowing towards the ejection orifice through the fuel ducts formed in the hollow bodies.

Abstract: A compact fuel injection nozzle includes a unitary nozzle body, a nozzle cap, a valve member and a spring sub assembly. The spring sub assembly provides a biasing force against a valve member that includes an integral lift stop. The biasing force holds the nose of the valve member against the valve seat of the nozzle body until the fuel pressure inside the injector exceeds a minimum opening pressure. The lift stop provides a stop limit, permitting the valve member to move away from the valve seat a predetermined axial distance. The minimum opening pressure and valve opening axial distance may be calibrated by selection and installation of shims.

Abstract: When a needle is separated from a needle seat, upward pressure of pressurized fuel is applied to downward pressure receiving surface outer portion and an annular downward pressure receiving surface inner portion. A bottom portion side extending portion is provided, which extends in a direction of a longitudinal axis K—K from a needle bottom surface inner portion, which is a portion of a bottom surface of the needle on an inner side of the annular seal, into a sack beyond a nozzle chamber. When the needle is separated from the needle seat, an area of the downward pressure receiving surface inner portion to which the upward pressure of the pressurized fuel is applied is decreased by a cross sectional area of the bottom portion side extending portion.