Abstract: The coupling device comprises a holding fixture being designed to be mechanically coupled to the fuel rail and comprising a through hole extending between a first surface and a second surface, the second surface opposing the first surface and being arranged and designed to face the cylinder head. Furthermore the coupling device comprises a fastening element being designed to be fixedly coupled to the cylinder head. The fastening element comprises a head portion and a shank portion. The head portion faces the first surface of the holding fixture and the shank portion is being partially arranged in the through hole and is designed to be in engagement with the cylinder head. In addition the coupling device comprises a retaining element being arranged inside the through hole, being coupled with the holding fixture, comprising in a given latch area a cross-section restriction and being in engagement with the shank portion at least in this latch area. The retaining element is formed as a one-piece unit.

Abstract: A tool for removing fuel injectors from a head assembly is disclosed that is comprised of a bolt, a dual-tined fork, and a plate that fit into the existing hold-down bolt holes in a head assembly and grooves in the fuel injectors.

Abstract: Systems and methods utilize a controller configured to perform a diagnostic routine for a combustion seal provided between a gasoline direct injection (GDI) fuel injector and a combustion chamber of a cylinder of a GDI engine. The diagnostic routine comprises determining one of (i) a period for the injector coil current to reach a peak current and (ii) a resistance of the injector coil while the injector coil current is saturated, determining whether the determined period or the determined injector coil resistance is greater than a respective threshold indicative of a predetermined temperature of the injector coil, and when the determined period or the determined injector coil resistance is greater than its respective threshold, detecting a combustion seal leak fault. Based on the combustion seal leak fault, the controller may modify operation of the engine to prevent potential heat damage to the engine.

Abstract: A fuel injection system designed for an internal combustion engine includes at least one fuel injection nozzle which, by way of a cylindrical shell body, is inserted at least in regions into a bore of a cylinder head and which, by way of a nozzle tip, feeds fuel to a combustion chamber between the cylinder head and a reciprocating piston. The fuel injection nozzle is held in position on a housing section of the internal combustion engine with the interposition of a holding device and, for example, a fastening bolt. The holding device braces a first end region of the fuel injection nozzle against a bore stop within the bore in the cylinder head. To optimize this fuel injection system, the holding device has, outside the bore, a fixing bushing to which the shell body is fixed axially and radially by way of a radial insert element.

Abstract: A control valve for controlling the movement of a needle of a fuel injector includes a coil which is attached to a housing of the injector, which housing engages with an armature which can be moved between an open position and a closed position. The armature includes a magnetic plate, through the center of which a rod, which forms a valve piston, extends perpendicularly to the plate to a remote end. The piston slides into a bore in the injector housing, the movements of the armature and of the piston opening or closing channels in which pressurized fuel flows. The armature is provided with a device for quickly discharging the fuel which is captive between the coil and the plate.

Abstract: Provided is a fuel injection valve which achieves both atomization of a fluid spray and improvement of the degree of freedom in design of a spray shape, a spray direction, etc. According to a fuel injection valve (1) of the present invention, at least one of injection holes is a switching-spray injection hole (12B), which corresponds to an injected spray, directions of a long axis and a short axis of a switching spray (32A) changing due to an axis-switching phenomenon to deform the switching spray (32A) at downstream. The plurality of injection holes other than the switching-spray injection hole (12B) are coalescent-spray injection holes (12A) for forming a coalescent spray (40) formed by coalescence under Coanda effect exerted between single sprays (30A, 31A). The coalescent spray (40) and the switching spray (32A) coalesce under the Coanda effect to form an integrated spray (50).

Abstract: A fuel-injection device has a low-noise and pivotable structure. The fuel-injection device includes at least a fuel injector and a receiving bore in a cylinder head for the fuel-injector, and a decoupling element between a valve housing of the fuel injector and a wall of the receiving bore. The decoupling element is captively situated on the fuel injector prior to its installation in the receiving bore in that a securing ring is mounted below the decoupling element at the outer periphery of the fuel injector and the securing ring is a closed plastic ring. The fuel-injection device is particularly suited for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having externally supplied ignition.

Abstract: A clip—for a fuel injection valve includes a load transmitting member—and a fitting member. The load transmitting member is formed from a single wire material and includes a contacting portion, which contacts a contactable surface formed in the fuel injection valve, a depressible portion, which is depressible in a downward direction by a pressing surface formed in a fuel supply conduit, and a spring portion, which is formed between one end of the contacting portion and the depressible portion and is resiliently deformable by a load. The fitting member-is formed separately from the load transmitting member and is connected to the load transmitting member on a side of the contacting portion, which is opposite from the spring portion. The fitting member is fittable to a fittable portion of the fuel supply conduit.

Abstract: A fuel rail assembly for a combustion engine includes a fuel rail, a plurality of fuel injector cups arranged and configured to face a cylinder head of a combustion engine and being hydraulically and mechanically coupled to the fuel rail directly or via pipe elements, and at least one support element configured to be fixedly coupled to the cylinder head. The at least one support element is fixedly coupled to two of the injector cups or to two of the pipe elements being coupled to the injector cups.

Abstract: In some examples, a clip prevents relative rotation between a fuel injector and an injector cup of a fuel rail. For instance, the fuel injector may be rotated following insertion into the injector cup to prevent removal of the fuel injector. The clip includes a clip body having a pair of arms extending from the clip body with an opening between the arms for receiving the fuel injector. A tab extends from the clip body into the opening for engaging a first alignment slot in the injector cup and a second alignment slot in the fuel injector when the clip is installed on the fuel injector. Following installation of the clip on the fuel injector, the tab is disposed in the first and second alignment slots to prevent relative rotation between the fuel injector and the injector cup.

Abstract: A rotating fuel injector assembly for a vehicle engine includes a base, an internal tip, an intermediate coaxial tip, and an external coaxial tip. The internal tip may be configured to move between an extended closed position and a retracted open position relative to the base. The intermediate coaxial tip may include an opening defined in a base of the intermediate coaxial tip. The base and the opening abuts the internal tip when the internal tip is in the extended closed position. The external coaxial tip may move between an extended open position and a retracted closed position relative to the base. The external coaxial tip includes a plurality of apertures which may align with the at least one opening in the intermediate coaxial tip at a predetermined event.

Abstract: An injector clip includes a lower plate formed to support a fuel injection portion of an injector, a base plate is formed to engage with and support a connection portion of the injector and an engagement support portion elastically supports the lower plate and the base plate to return the fuel injection portion to an original position after being displaced. A spring arm is formed by extending from the base plate to support a fuel inlet portion of the injector. Accordingly the load resulting from fuel injection of a fuel injector is attenuated and p a fuel injection device is prevented from rotating.

Abstract: A fuel injection assembly for a combustion engine includes an injector body, an injector cupradially enclosing an axial end of the injector body, and a spring clip coupling the injector cup with the injector body. The spring clip includes a ground plate with a main extension plane perpendicular to a longitudinal axis of the fuel injection assembly, a recess extending inwards from a lateral end of the ground plate to a bottom part having a circle-segment contour extending through an angle between 270° to 180°, and at least one spring element fixed to the ground plate. The spring element of the spring clip has a contact region with the injector cup, and the ground plate has a contact region with the injector body, whereby the spring element exerts a spring force on the injector cup. The ground plate of the spring clip extends into a cutout of the injector cup.

Abstract: An injector clamp for clamping at least two injectors to an engine head includes a body having at least a first arm and a second arm. Each arm having a first clamping surface and a second clamping surface on opposing sides of the body. A distance between the first clamping surfaces of the first arm and the second arm is different from a distance between the second clamping surfaces of the first arm and the second arm. The body is configurable, for use, in one of: a first position in which the first clamping surfaces from each of the first and second arms can abut with an injector; and a second position in which the second clamping surfaces from each of the first and second arms can abut with an injector.

Abstract: The present disclosure provides a fuel injector seal assembly comprising a seal member comprising a first section, a second section and an annular recess disposed in the first section, the first section having a first diameter and the second section having a second diameter wherein the first diameter is greater than the second diameter; and a sleeve member comprising a first end received by the first section of the seal member, the sleeve member further including a lengthwise portion configured to press fit around a nozzle housing of a fuel injector to cause heat transfer from the nozzle housing toward a body portion of the fuel injector.

Abstract: A fuel injection valve includes a housing having a nozzle hole, a valve seat, and a fuel passage; a needle that is accommodated in the housing to be capable of reciprocating in an axial direction of the housing and that opens or closes the nozzle hole; a coil; a fixed core; a movable core; a shift permitting member that is provided between the housing and an internal-combustion engine to permit a shift of an attachment position at time of attachment of the housing and the engine; and a friction reducing part that is provided between the engine and the shift permitting member to reduce friction between the engine and the shift permitting member. The friction reducing part permits displacement of the housing in a direction perpendicular to the axial direction of the housing.

Abstract: A valve assembly for an injection valve includes a valve body with a central longitudinal axis, the valve body having a valve body groove extending circumferentially around the valve body and being designed to take in a gasket, the valve body groove having a first wall section and a second wall section, the wall sections configured to be coupled to the gasket in a manner that the valve assembly is sealingly coupable with a cylinder head of a combustion engine, and an injection nozzle enabling a fluid flow through the valve assembly. The second wall section is arranged relative to the first wall section in axial direction away from the injection nozzle. The first wall section extends to a first radius and the second wall section extends to a second radius, and the first radius is bigger than the second radius.

Abstract: A fluid injection assembly for a combustion engine includes an injector body having a notch, an injector cup, which radially encloses an axial end of the injector body and has a projecting part, and a spring clip arranged between the injector body and the injector cup. The spring clip includes a ground plate, at least one spring element, and at least one holding element engaging behind the projecting part of the injector cup. The ground plate is arranged in the notch of the injector body. The injector body and the injector cup are coupled together by the spring clip by mechanical interaction via the projecting part and the notch, respectively.

Abstract: The decoupling element for a fuel injection device according to the invention is characterized in particular in that a low noise design is implemented. The fuel injection device includes at least one fuel injector and a receiving borehole in a cylinder head for the fuel injector, and the decoupling element between a valve housing of the fuel injector and a wall of the receiving borehole. The decoupling element is a decoupling system made up of a contoured spring seat on a shoulder of the receiving borehole and a spring washer resting on the shoulder. The fuel injection device is suited in particular for direct injection of fuel into a combustion chamber of a mixture-compressing spark-ignition internal combustion engines.

Abstract: A fuel injector assembly with a fuel injector and a coupling device is disclosed. The coupling device includes a fuel injector cup, a plate element, one or more screws and a wing clip. The plate element includes at least one through-hole for fixedly coupling the fuel injector cup with the plate element by the screw or screws respectively, so that the fuel injector cup, the plate element and the screw(s) are positionally fixed with respect to each other. The wing clip is arranged at least partly around the fuel injector and extends outward in a radial direction such that the screw or screws, respectively, are operable to block a movement of the fuel injector relative to the plate element in a first direction of the central longitudinal axis by mechanical interaction with the wing clip.

Abstract: A fuel supply device for an engine is provided in which a throttle body is provided with an electrically operated fuel pump, wherein a base member integrally having a base portion that extends in the vertical direction on one side of the throttle body and a housing tube portion that is formed into a bottomed tube shape having an end wall communicating with the base portion is linked integrally to a body, a pump housing case that forms a fuel storage chamber is formed from the housing tube portion and a bottomed tubular housing cover joined to the housing tube portion via a seal member and is disposed beneath the body, and a vapor discharge path for discharging vapor generated in a fuel storage chamber is formed in the base portion so as to extend in the vertical direction and communicate with the fuel storage chamber.

Abstract: An injector sleeve adapted to be mounted in a cylinder head of an internal combustion engine, where the injector sleeve comprises a tapered inner surface which constitutes a sealing surface for an injector, where the hardness of the tapered inner surface is higher than the hardness of the outer surface of the injector sleeve. The injector sleeve is produced in a cold forming process. The advantage of the invention is that the injector sleeve is provided with a sealing surface for an injector which is harder than the outer surface of the injector sleeve. In this way, a sealing surface for an injector having small tolerances is obtained without further machining, where the outer surface may be turned to the desired dimensions.

Abstract: A fuel injector that includes an injector control valve assembly. The injector control valve assembly includes a contact spring positioned between a fuel injector upper body and the injector control valve assembly to isolate a stator housing from clamping forces that occur during fuel injector assembly and clamping in an internal combustion engine. The injector control valve assembly further includes a cartridge configuration that permits preassembly of the injector control valve assembly prior to mounting in the fuel injector.

Abstract: A fuel delivery pipe assembly for direct injection of fuel includes a fuel delivery pipe, a plurality of fuel injector sockets for containing a fuel injection valve, and a mounting bracket of sheet metal fixedly assembled with the fuel delivery pipe at a position adjacent each fuel injector socket. The mounting bracket has a mounting plate portion formed with a mounting hole for insertion of a bolt and a through hole for insertion of each fuel injector socket spaced from the mounting hole in the longitudinal direction of the delivery pipe. A reinforcement bracket is integrally assembled with the mounting bracket at the opposite side of the fuel injector socket in the longitudinal direction of the delivery pipe, and a reinforcement rib extended from an arm portion of the reinforcement bracket is provided on the mounting plate portion between the mounting hole and the through hole for the fuel injector socket.

Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided in which a fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the fuel injection valve injecting fuel from a front end of a valve housing part into a combustion chamber of the engine, and the in-cylinder pressure sensor, which is cylindrical and has a front end facing the combustion chamber, and a cylindrical signal circuit tube fitted and connected to an inner peripheral face of a rear end of the in-cylinder pressure sensor are fitted and fixed to an outer peripheral face of the valve housing part, housed in the injection valve mounting hole, of the fuel injection valve. In such fuel injection valve, the signal transmission device connected to an in-cylinder pressure sensor does not vibrate within an injection valve mounting hole, thus enabling its durability to be ensured.

Abstract: A system for measuring an injection process in a combustion engine includes a tank configured to hold a fuel. A storage container is configured to hold a compressed fuel. At least one injection valve is arranged at the storage container. A fuel line in which a fuel conveying pump and a high-pressure fuel pump are arranged. The fuel conveying pump and the high-pressure fuel pump are configured to convey the fuel into the storage container. A first pressure sensor is configured to measure a pressure in the storage container. A detection device is configured to detect control data of the at least one injection valve. A measuring device is arranged in the fuel line. The measuring device is configured to measure a temporally resolved volumetric or gravimetric flow process. A processor is connected to the measuring device and to the first pressure sensor via a data transmission line.

Abstract: A mounting assembly for mounting a fuel injector to a fuel rail. The mounting assembly includes a mounting boss and a fuel cup. The mounting boss is configured to be mounted to the fuel rail and receive a bolt within the mounting boss to couple the fuel rail to a cylinder head. The fuel cup is coupled to the mounting boss and configured to receive the fuel injector therein, as well as be mounted to the fuel rail to direct fuel from the fuel rail to the fuel injector.

Abstract: A nozzle assembly for a gaseous fuel injector of an engine is disclosed. The nozzle assembly may include a gaseous fuel injector having a nozzle with a tip end. The nozzle assembly may also include a blocking member having an inner contact surface configured to receive a periphery of the nozzle at the tip end, and an outer contact surface configured to engage an air intake port of a cylinder and create a hermetic seal between the gaseous fuel injector and the air intake port.

Abstract: A fuel injector which injects a gaseous fuel includes a nozzle and a housing. The nozzle has an outlet which injects the gaseous fuel at a flow rate greater than or equal to a predetermined rate. The housing has a mixing chamber which communicates with the outlet. The housing further has an air introducing passage which introduces an outer air into the mixing chamber and an injection hole which injects an air-mixed fuel formed by mixing the gaseous fuel with the outer air. Thus, a mixing of the gaseous fuel and the outer air can be improved, and the gaseous fuel can be efficiently combusted.

Abstract: In a GDI fuel rail mounting system comprising a fuel injection rail, having at least one fuel injector receiving cup with a generally cylindrical shape directly attached to the fuel rail generally perpendicular to and offset from the center of the fuel rail. The fuel rail further comprising at least one generally cylindrical attachment means proximal the fuel injector receiving cup, also attached to the fuel rail offset from the center thereof, the attachment means and the fuel injector receiving cup being disposed generally parallel to each other. A securing strap is attached to the outer curvature of at least one of the injector receiving cup and the attachment means, at least partially wrapping around the outer periphery of the attachment means, thereby inhibiting torsional, lineal, and lateral movement of the injector cup relative to the attachment means and the fuel rail.

Abstract: This disclosure provides a fuel injector seal assembly comprising a seal component fabricated or formed of a first material and a thermally conductive or heat transfer component fabricated or formed of a second material that is different from the first material. The first material has a greater strength than the second material, and the second material has a greater thermal conductivity than the first material. Thus, the injector seal assembly is able to provide a primary benefit of a combustion seal while also providing an enhanced benefit of transferring heat from one portion of the fuel injector to another portion of the fuel injector.

Abstract: An internal combustion engine for a motor vehicle includes at least one cylinder, an injection valve associated to the cylinder for direct injection of fuel into a combustion chamber of the cylinder. The injection valve is received in a receiving opening of a cylinder head of the internal combustion engine and held by a support element in the receiving opening. The support element is secured in its rotational position by a formfitting engagement of a first formfit element on the injection valve, and by a formfitting engagement of a second formfit element on the cylinder head. A support element of this type ensures a particularly satisfactory securement of the rotational position of the injection valve. In the event of structural changes to the cylinder head or at the injection valve, it is only necessary to adapt the support element so that such modifications can be realized particularly inexpensively.

Abstract: A method of operating an internal combustion engine with gaseous fuel includes providing fuel to a plurality of cylinders with both central point injection and multipoint injection. Central point injection, which provides good air/fuel mixing, may provide a majority of steady-state fueling, and multipoint injection is used for supplementing the central point injection during steady-state and for providing rapid transient response to load changes.

Abstract: New strategies for control and feeding of air/fuel homogenous mix for internal combustion engines, mainly for fuel injection engines. This new strategies are to get an air/fuel mixture homogeneous and of adequate volume. Fuel in contact with air for a sufficient length of time required for better physical combination prior to the time of ignition at the spark plug and of a volume such that the combustion flame can reach the entire mixture admitted. Strategies to prevent the problem known as “wet wall”. This consisting of a new intake manifold, new fuel injectors, injector nozzles and new algorithms and strategies in the control software program of the ECU or MCU controlling the internal combustion engines.

Abstract: An engine component seal assembly and method of sealing a coolant passage from an engine component are provided. The seal assembly includes a sealing sleeve sized and dimensioned to slip fit into an engine component mounting bore and a retaining ring sized and dimensioned to be axially inserted into the sleeve. The ring contacts the sleeve and applies a radial force sufficient to create an interference fit and to move or yield an interface portion of the sleeve radially outward into sealing abutment against a wall forming the mounting bore to create a secure and reliable annular fluid seal.

Abstract: An injector for the metered ejection of a fluid, in particular fuel, has a housing and a plastic extrusion coating, which encloses the housing, and from which the housing protrudes at an upper housing end on the fluid inlet side and at a lower housing end on the fluid ejection side. To achieve a so-called “fording capability” of the injector, the peripheral separation point of the housing and the plastic extrusion coating, at the lower end of the plastic extrusion coating, is sealed, preferably with the aid of a sealing collar.

Abstract: A fluid injector includes a body associated with an outlet of the injector. An inlet tube is coupled to the body and has an open end for receiving fluid to be injected. An inlet cup has an open end and covers the open end of the inlet tube and also covers a portion of the body. The injector includes sealing structure including a primary seal providing a seal between the inlet cup and the inlet tube, a secondary seal between the body and the inlet cup and constructed and arranged to prevent liquid that is external to the injector from entering an interior of the injector through the open end of the inlet cup, and a surface feature on the body or on the inlet cup constructed and arranged to compress a portion of the secondary seal between the inlet cup and the body.

Abstract: A decoupling element for a fuel injection device has a low-noise construction. The fuel injection device includes at least one fuel injector and one receiving bore in a cylinder head for the fuel injector and the decoupling element between a valve housing of the fuel injector and a wall of the receiving bore. The decoupling element has a nonlinear progressive spring characteristic as a solid-state joint, at least one bearing collar including a valve contact surface, which is designed to be spherical, i.e., convex, extending upward from a flat annular area, the flat annular area being supported on a supporting base, and the inside of the annular area has a smaller inside diameter D than the bearing collar and the supporting base, which is supported on the wall of the receiving bore.

Abstract: A damping element implemented for damping a vibration transmitted between an injection valve and a cylinder head of an internal combustion engine may include a base body substantially shaped as a ring washer and at least one first contact segment fixedly coupled to the base body and protruding past the base body in a first axial direction and a second contact segment fixedly coupled to the base body and protruding past the base body in a second axial direction opposite the first axial direction. The first at least one contact segment has a radial offset from the longitudinal axis that is unequal to a radial offset of the second contact segment from the longitudinal axis.

Abstract: A flow directing device for imparting swirl on a fluid includes a flow directing body having an inboard surface and opposed outboard surface. A flow channel is defined in the outboard surface of the flow directing body for conducting fluids flowing through the flow directing body. The flow channel includes a channel floor and a sidewall extending from the channel floor to the outboard surface of the flow directing body. A swirl port extends from the sidewall of the flow channel though the flow directing body to the inboard surface of the flow directing body for mitigating pressure loss when discharging fluid from the flow channel.

Abstract: A functional module integrates a distributor with a plenum and several pipes that form a common attachment and connection plate, a fuel rail, and a holding part for ensuring the locking in position of the fuel rail. The functional module (1) is characterized in that it consists of an interlocked and nested arrangement that includes the distributor (2), the fuel rail (7), and the holding part (9), with the fuel rail (7) being held between the holding part (9) and the distributor (2), and in that the holding part (9) and the distributor form by cooperation a longitudinal receiving housing with the possibility of locking the fuel rail (7) whose introduction opening is defined between an arrangement of feet (10) of the holding part (9) and the plate (5) of the pipes (4).

Abstract: An engine having DME pilot ignition is disclosed. DME Pilot ignition creates far more energy than a conventional spark plug, thus minimizes the possibility of misfire in the engine map. DME injection can be used in a number of ways. In one embodiment, DME injection replaces the conventional spark plug in an Otto cycle engine. In another embodiment, DME injection is used in addition to spark ignition to minimize the use of DME. In this embodiment, DME injection is only used during those portions of the engine map where misfire may occur, or during those times when a misfire sensor detects misfire. DME injection can also be used in conjunction with alcohol boosting in other embodiments.

Abstract: A fuel injector cradle mount assembly for a vehicle includes a fuel injector rail, a connective inlet assembly coupled to the fuel injector rail, a cradle coupled to the connective inlet assembly, and a fuel injector. The fuel injector includes a torso and a nozzle. The torso includes a base portion on a first end, and defines an inlet on a second end opposite the first end. The fuel injector is arranged between the connective inlet assembly and the cradle. The inlet of the fuel injector is coupled to the connective assembly, the base portion of the fuel injector rests on the cradle, and the cradle supports the fuel injector from the connective inlet assembly and the fuel injector rail.

Abstract: An internal combustion engine is provided including an injector having an injector body including a nozzle assembly having an annular outer surface. A cylinder head includes an injector mounting bore to receive the injector, and a lower sealing portion. The engine also includes an engine coolant passage formed in the cylinder head to receive engine coolant to remove heat from the cylinder head. The engine coolant passage opens into, and is fluidly connected to, the mounting bore to cause coolant in the coolant passage to contact the annular outer surface of the nozzle assembly. A lower seal is positioned between the lower sealing portion and the nozzle assembly to form a fluid seal.

Abstract: A tubular rail body has an inlet for introducing a fuel therein from a fuel supply source. A plurality of tubular protrusion portions project from the rail body in a substantially vertical direction relative to an axial direction of the rail body, and are arranged at a predetermined interval in the axial direction. A tubular extension portion extends from each of the protrusion portions in a substantially vertical direction relative to both an axial direction of the protrusion portions and the axial direction of the rail body. The tubular extension portion is inserted into a bore which extends from an exterior of an internal combustion engine to a combustion chamber. A connecting portion is formed on an end portion of the extension portion opposite to the protrusion portion and is fluidly connected with a fuel injector inserted in the bore.

Abstract: A decoupling element for a fuel injection device provides a low-noise construction. The fuel injection device has at least one fuel injection valve and a receiving bore in a cylinder head for the fuel injection valve as well as the decoupling element between a valve housing of the fuel injection valve and a wall of the receiving bore. The spring rigidity of the decoupling element is so low and the decoupling element is placed between the valve housing of the fuel injection valve and the wall of the receiving bore in such a way that the decoupling resonance is located in the frequency range below 2.5 kHz. The fuel injection device is particularly suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing spark-ignited internal combustion engine.

Abstract: A device for injecting fuel over a cylinder head of an engine, including a tubular body, an injection nozzle forming an extension of the tubular body, a needle extending coaxially to the nozzle in a form of a rod, an end of which includes a head forming a valve on a seat supported by the injection nozzle, and an actuator configured to cause a movement of the head so as to open the valve, the needle configured to axially resonate when the same is subjected to axial pulses at a predetermined nominal frequency by the actuator. A system for mounting the device includes a spacer for bearing on the cylinder head, as well as on a front surface of the tubular body at the connection to the nozzle.

Abstract: A fastening structure of a fuel delivery pipe and a cylinder head of an internal combustion engine includes three or more bosses provided on each of the cylinder head and the fuel delivery pipe, and fastening portions formed by bolting the bosses on the cylinder head to the bosses on the fuel delivery pipe. The fastening portions at both end portions of the fuel delivery pipe are less rigid than one or more fastening portions in a middle between the fastening portions positioned at both end portions of the fuel delivery pipe.

Abstract: A fuel injection adapter can include a primary cavity into which a primary fuel injector can be received and a secondary cavity into which a secondary fuel injector can be received. A channel can provide fluid communication between the primary and secondary cavity, and the primary cavity can be in fluid communication with an outlet of the fuel injection adapter.

Abstract: A tubular debris shield and diverter mounted in a high pressure flow passage within a fuel injector, provide the dual functions of passing the main flow of high pressure fuel with large debris particles to relatively large discharge openings, such as the injector spray holes, while allowing some high pressure fuel to flow through a multitude of very small transverse holes to a sensitive hydraulic component, such an injector control valve circuit. In one embodiment, the tube has a wall thickness in the range of about 0.1 to 0.5 mm at least about 2000 holes with a diameter in the range of about 20 to 30 microns.