Abstract: A coupling arrangement has a housing, a cylindrical supporting element having a center axis, which at least partly axially overlaps with the housing and contacts it at a first axial end area to disable movement at least in one direction along the center axis, the supporting element has at least a first protrusion, a connecting element with at least a second protrusion, which at least partly axially overlaps with the supporting element and which is arranged along the center axis facing away from the first axial end area, and a spring arranged and designed such that a first and a second axial end rest on the first protrusion and the second protrusion, respectively. The spring, the supporting element with its first protrusion and the connecting element second protrusion are designed and arranged such as to provide an axial force along the center axis at the first axial end area.

Abstract: A low pressure, low cost electronic fuel injection system (18) for small hand-held two cycle engines (1) is provided which employs a number of improvements, including by way of example and not of limitation, an improved low cost injector construction (45), a throttle body integration (10) that includes mounting the operational components of the supply system on a single unit, an improved ignition module (40), a pressure regulated fuel system controlled by an electronic control unit (42) employing and an adaptive algorithm based on engine speed which controls the speed by varying the amount of fuel provided to the engine.

Abstract: The present application discloses an engine configured to selectively operate using a first fuel and a second fuel and adapter devices and methods for converting an engine to operate using a second fuel. In certain embodiments, the adapter device comprises a body member configured to be installed between an upper intake manifold and a lower intake manifold of an engine. A plurality of intake channels and fuel injector ports are formed in the body member. The body member is configured such that the intake channels are substantially aligned with the corresponding intake openings of the upper and lower intake manifolds when the body member is installed between the upper and lower intake manifolds. Each fuel injector port extends from a sidewall of the body member to at least one intake channel and is configured to receive a fuel injector for emitting a second fuel into the intake channel.

Abstract: The present invention relates to a fuel injection system for the direct injection of fuel into a combustion chamber of an internal combustion engine. At least one fuel injection valve is arranged on a cylinder head in a receiving bore in order to inject fuel into the combustion chamber. A fuel distribution line is provided for feeding the fuel to the fuel injection valve. A compensation element for a position compensation and/or tolerance compensation, is arranged in the radial direction between the fuel injection valve and the cylinder head and is arranged in the axial direction of the fuel injection valve between a first sealing element, sealing between the fuel injection valve and the cylinder head on a side facing the combustion chamber of the fuel injection valve, and a second sealing element, sealing between the fuel injection valve and the fuel distribution line.

Abstract: A coupling device for coupling a fuel rail to a cylinder head of a combustion engine may include: a fuel injector cup coupled to the fuel rail and facing the cylinder head, a first fastening element facing the fuel injector cup and fixedly coupled to the cylinder head, at least one first spring element arranged between the first fastening element and the fuel injector cup and/or between the fuel injector cup and the cylinder head, a support element arranged between the fuel rail and the cylinder head and fixedly coupled to the fuel rail, a second fastening element engaged with the support element and fixedly coupled to the cylinder head, and at least one second spring element arranged between the second fastening element and the support element and/or between the support element and the cylinder head. The first spring element(s) may comprise metal, and the second spring element(s) may comprise plastic.

Abstract: A fuel injection system, and a structure for mounting a fuel injection valve to an internal combustion engine, that includes: a combustion chamber formed at an end surface of a piston that reciprocates in a cylinder; an intake port through which intake air drawn into the combustion chamber flows; and an intake valve that opens and closes a connection between the intake port and the combustion chamber, the fuel injection valve being placed to inject fuel into intake air in the intake port, wherein an end portion of the fuel injection valve located on a combustion chamber side thereof is placed at a location that overlaps with an imaginary plane perpendicular to a center axis of the cylinder and extends along a portion of a wall surface of the intake port where the intake valve protrudes, or is projected out from the imaginary plane toward the combustion chamber.

Abstract: An injector mount system (30) is provided for mounting an injector (22) to an exhaust flow conduit (21) in an exhaust treatment system (10). The injector (22) includes a housing (32) having an open end (46) that mounts an orifice/nozzle (38). The injector mount system (30) includes a boss (62) fixed to the exhaust flow conduit (21), and an end cap (44) of the injector (22) that is attached to the housing (32), closing the open end (46) and securing the orifice/nozzle (38) in the open end (46). The boss (62) and end cap (44) include mating flanges (60,64) that define a non-threaded connector for securing the injector (22) to the exhaust flow conduit (21). The mating flange (60) of the end cap (44) being formed as a unitary part of the end cap (44), and the mating flange (64) of the boss being a unitary part of the boss (62).

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: A method for retrofitting an existing EMD 567/645 two-cycle diesel engine to reduce exhaust emissions includes the steps of removing mechanical fuel injectors and associated components and installing of electronic unit fuel injectors and associated components. Also disclosed is a kit for retrofitting an existing EMD 567/645 two-cycle diesel engine to reduce exhaust emissions.

Abstract: A coupling arrangement (12) includes a housing (6), at least one locking element (14) designed to at least partly surround the housing (6) forming a first area of contact (18) with the housing (6) via a positive locking or frictional connection to limit rotational movement of the housing (6), and a connecting element (16). The connecting element (16), arranged at least partly circumferentially around the housing (6) and being cylindrical with a center axis (X), has at least one locking recess (20) designed to at least partly take in the respective locking element (14) to limit rotational movement of the connecting element (16) via positive locking. The housing (6), the locking element (14) and the connecting element (16) are designed and arranged such as to limit movement of the housing (6) relative to the connecting element (16) at least in one direction of the center axis (X).

Abstract: It is equipped with an injector body 4z which has formed therein high-pressure paths 6az, 6bz, and 6cz through which high-pressure fuel flows to a spray hole and stores therein a piezo-actuator 2z (i.e., an opening/closing mechanism) and a back-pressure control mechanism 3z (i.e., an opening/closing mechanism) which open or close the spray hole, and a fuel pressure sensor 50z installed in the body 4z to measure the pressure of the high-pressure fuel. The body 4z has formed therein a branch path 6ez diverging from the high-pressure paths 6bz and 6cz to deliver the high-pressure fuel to the fuel pressure sensor 50z.

Abstract: An internal combustion engine has multiple cylinders each provided with multiple injectors. A fuel supply pipe device includes multiple fuel passages, which receive fuel through multiple fuel paths and supply the fuel correspondingly to the multiple injectors. The multiple fuel passages are separated respectively from the multiple fuel passages.

Abstract: Coupling device for hydraulically and mechanically coupling a fuel injector to a combustion engine fuel rail, having a fuel injector cup with a central longitudinal axis hydraulically coupled to the rail and engaging a fuel inlet portion of the injector, a first ring element fixedly coupled to the cup, and a second ring element fixedly coupled to the injector. One of the ring elements has a collar arranged radially outside the other elements and extending from the one element in direction of the longitudinal axis. The collar has a recess facing the central longitudinal axis. A circlip is arranged in the recess and arranged and designed to form a positive fitting coupling between the first and second ring elements. The circlip prevents a movement of the first ring element relative to the second element retaining the fuel injector in the fuel injector cup in direction of the central longitudinal axis.

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: A system for feeding gas fuel to an internal combustion engine, having: a fuel tank; fluidic connector along which fuel flows, and interposed fluidically between the tank and a cylinder of the engine; and an electro-injector fluidically in series with respect to the fluidic connector, and which is interposed between the tank and the cylinder, and is activated selectively to disable or enable fuel flow to the cylinder; the electro-injector is positioned with respect to the fluidic connector solely by connecting at least an inlet or outlet of the electro-injector to at least one pipe defined by the fluidic connector.

Abstract: Fuel is injected into and through the exhaust port and into the cylinder of the piston engine during the time when the flow is reversed from the normally expected flow. The engine is able to operate with some or all of its fuel injected backwards of conventional expectations. In another embodiment the fuel is injected with solid stream injector sprays directed against exhaust valves and ports and deflected into the piston cylinder against the flow of normally aspirated or supercharged engines. This invention can apply to gasoline or diesel cycles and four and two stroke type cycles of engine.

Abstract: A method for installing a sealing ring in a ring groove of an injector, in particular a fuel injector, in which the diameter of the sealing ring is enlarged with the aid of an enlarging tool and is inserted into the ring groove, and the enlarged sealing ring accommodated in the ring groove is reshaped to a predefined sealing dimension with the aid of a calibration tool. For the purpose of shifting a residual ring gap remaining in the ring groove during the reshaping process to the groove flank of the ring groove facing away from the combustion chamber, the reshaping process of the sealing ring is carried out by removing the calibration tool from the fuel injector.

Abstract: An injector mount clamp for coupling an injector of an exhaust gas treatment system to an exhaust conduit of an engine while the conduit is in an installed position includes a resilient monolithic clamp body having an aperture extending therethrough and being shaped as a split collar having a first end spaced apart from a second end a distance allowing the clamp body to be transversely moved relative to an exhaust flow direction to a position circumferentially surrounding the exhaust conduit. An injector mounting boss is disposed on the clamp body and defines a passage that fluidly communicates with the aperture of the clamp body. The mounting boss has a mounting face configured to oppose the injector.

Abstract: Coupling device for hydraulically and mechanically coupling a fuel injector to a fuel rail of a combustion engine. The fuel injector has a central longitudinal axis. The coupling device has a fuel injector cup being designed to be hydraulically coupled to the fuel rail and to engage a fuel inlet portion of the fuel injector, a first plate element being fixedly coupled to the fuel injector cup, the first plate element comprising a recess, and a second plate element being fixedly coupled to the fuel injector and being arranged in the recess and being fixedly coupled to the first plate element to retain the fuel injector in the fuel injector cup in direction of the central longitudinal axis. The fuel injector comprises a groove. A snap ring is arranged in the groove of the fuel injector and is designed to fixedly couple the second plate element to the fuel injector.

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: An injector seal assembly and method of sealing a coolant passage from an injector are provided. The seal assembly includes a sealing sleeve sized and dimensioned to slip fit into an injector 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 injector mounting bore to create a secure and reliable annular fluid seal.

Abstract: A fuel injector assembly includes a modular fuel injector unit and a cylinder head side member. The modular fuel injector unit includes a first fuel injector with a first seal, a second fuel injector with a second seal and a fuel distribution pipe coupled together as a single installable unit. The cylinder head side member includes a first insertion hole with a first fitting section and a second insertion hole with a second fitting section. The first and second insertion holes and the first and second seals of the first and second fuel injectors are arranged such that as the modular fuel injector unit is being mounted to the cylinder head side member, the first seal undergoes a maximum compressive deformation in the first fitting section at a time that does not coincide with a time that the second seal undergoes a maximum compressive deformation in the second fitting section.

Abstract: A fuel-injection device includes at least one fuel injector, one receiving bore-hole for the fuel injector, and one pipe-shaped pipe connection of a fuel rail. The fuel injector is pushed into the interior of the pipe connection by an upstream inlet connection. A bayonet closure ensures that the fuel injector is fastened in the pipe connection of the fuel rail in a secure and detachable manner.

Abstract: A fluid injector assembly has a fluid injector (14) with a fluid inlet portion (16), a fluid injector cup (18) with an inner surface (30), an outer surface (28) and a heating device (32). The fluid inlet portion (16) of the fluid injector (14) has a sealing ring (26) being arranged and designed to sealingly engage the inner surface (30) of the fluid injector cup (18). The fluid injector cup (18) is designed to couple the heating device (32) thermally to the sealing ring (26) of the inlet portion (16) and to couple the fluid inlet portion (16) mechanically.

Abstract: A connector device and method of converting an engine to operate using an alternative fuel is disclosed. In one embodiment, the connector device comprises an outlet portion, a first injector portion, and a second injector portion. The outlet portion is configured to mate with a fuel injector opening of the engine. The outlet portion comprises an outlet channel in fluid communication with a combustion chamber of the engine when the connector device is installed in the fuel injector opening. The first injector portion is configured to receive a first fuel injector and comprises a first injector opening and a first injector channel. The second injector portion is configured to receive a second fuel injector and comprises a second injector opening and a second injector channel. The second injector channel is curved to provide a laminar flow of fuel through the second injector channel.

Abstract: An injector hole structure for an engine, may include an inlet portion and an outlet portion, a wall narrowing from the inlet portion to the outlet portion, and a tumble generating protrusion protruding from an inner surface of the wall toward a center axis of the wall and having a concentric circular shape with the inlet portion or the outlet portion or a tumble generating groove depressed on an inner surface of the wall away from a center axis of the wall and having a concentric circular shape with the inlet portion or the outlet portion.

Abstract: The invention provides a manifold block for improving the efficiency of an internal combustion engine. The manifold block is arranged to be located between an inlet manifold and a cylinder head of the engine, and comprises a block of material having at least one manifold channel there through. The manifold channel has an input end and an output end, wherein the input end is connected to the inlet manifold, and the output end is connected to the cylinder. The manifold channel includes at least one injector head channel located towards its input end and adapted to receive a fuel injector. The manifold block may also incorporate one or more induction regulators for improving the efficiency of fuel/air mixing in the manifold channels.

Abstract: A coupling device for hydraulically and mechanically coupling an injection valve to a fuel rail of a combustion engine, has a fuel injector cup with a central longitudinal axis which can be hydraulically coupled to the fuel rail and at least partially engaged with the fuel inlet tube. The cup has an inner bottom surface facing the valve, a first retaining element fixedly coupled to the cup, a second retaining element fixedly coupled to the valve, wherein the second retaining element is coupled to the first element to prevent a movement of the second element relative to the first element in a first axis direction, and a damper element which is arranged axially between the inner bottom surface of the cup and the inlet tube. The damper element limits a movement of the valve relative to the cup in a second direction of the longitudinal axis opposing the first direction.

Abstract: The invention relates to a fuel injection device for injecting fuel into a combustion chamber of an internal combustion engine, comprising an end (6) that is located at a distance from the combustion chamber and has at least one electric connection (33) and at least one return flow connection (40). In order to create a fuel injection device (1) that has a simple design and can be produced cost-effectively, the return flow connection (40) and the electric connection (33) are integrated in a common connecting member.

Abstract: An internal combustion engine with combustion chambers into which liquid and gaseous fuel is introduced together with intake air is operated, at least predominantly, with only one type of fuel in a range in which a harmful HC excess is produced by internal combustion. A retrofitting/conversion kit for such an internal combustion engine has at least one securing plate for at least one injection nozzle for gaseous fuel, wherein a supply conduit for the gaseous fuel is connectable to the at least one injection nozzle, wherein the at least one securing plate is an intermediate flange to be connected between a cylinder head of the internal combustion engine and an intake manifold of the internal combustion engine.

Abstract: The invention relates to a high pressure injection arrangement for an internal combustion engine with direct injection, with an injection valve and a support element, which supports the injection valve in the installed state on a seat of an internal combustion engine. It is provided that a spring element is arranged between the injection valve and the support element.

Abstract: A method of forming a fuel injector clamp utilizing powder metal techniques is provided. A powder metal charge comprising in percent by weight, 0.6-0.9 carbon, 1.5-3.9 copper, 93.2-97.9 iron with the balance other elements, is die compacted to a density of 7.0-7.1 grams per cubic centimeter pre-sintered at 1500-1600 degrees Fahrenheit to form a powder metal blank. The powder metal blank is then lubricated and re-compacted to at least 7.3 grams per cubic centimeter and sintered at 2050 degrees Fahrenheit to form a final powder metal blank. The fuel injector clamp itself is comprised of a unitary structure of powder metal having a generally cylindrical center portion, with a first wing portion extending laterally there from and a second wing portion extending laterally there from at a 180 degree angle from the first wing portion.

Abstract: A covering body (10) made of a synthetic resin and including a rear shoulder part (16) oriented toward a fuel inlet part (6) side is formed around an outer periphery of an intermediate portion in an axial direction of a fuel injection valve (I). The rear shoulder part (16) includes: a first semicircular shoulder part (16a) extending over a half periphery of the covering body (10); a second semicircular shoulder part (16b) shifted in the axial direction with respect to the first semicircular shoulder part (16a) and extending over the other half periphery of the covering body (10); and a standing wall (16c) standing to connect the first and second semicircular shoulder parts (16a, 16b).

Abstract: A fuel supply system for an internal combustion engine has an air filter for cleaning intake air comprising a housing and a filter element, an intake unit for supplying the cleaned intake air to combustion chambers of the internal combustion engine and a fuel injection unit comprising a container for pressurized fuel, in particular a fuel distribution rail, and a plurality of injectors connected with the container. The fuel injection unit is integrated in the air filter.

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 fuel injection valve is provided which includes a valve seat member (3) having a valve seat (8) and a nozzle (10) that is provided so as to be connected to a front end part of the valve seat member (3) so as to be positioned on the downstream side of the valve seat (8) and has a plurality of fuel discharge holes (11b) arranged around an axis (A) of the valve seat member (3), wherein the angle formed between the center line (Lb) of each of the fuel discharge holes (11b) and an inner end face (10a) of the nozzle (10) is set at an obtuse angle (?) on the side closer to the outer periphery of the nozzle (10) with respect to the center line (Lb) and an acute angle (?) on the side closer to the center of the nozzle (10) with respect to the center line (Lb), and fuel injected from a fuel discharge hole (10b) produces a fuel spray form (fb) as a fuel film having an arc-shaped cross section with a convex face facing the nozzle outer periphery side.

Abstract: In a method for diagnosing an internal combustion engine having first and second fuel injectors, if a misfire is detected, the following steps are performed in sequence: a first fuel quantity of the fuel is introduced only by the first fuel injector; a check is performed to determine whether a misfire results from the introduction of a first fuel quantity in the first step; a second fuel quantity of the fuel is introduced only by the second fuel injector; a check is performed to determine whether a misfire results from the introduction of the second fuel quantity in the third step; and an engine error is diagnosed if a misfire was detected in the second or in the fourth step.

Abstract: An engine assembly may include an engine block, a cylinder head, a fuel injector, and a fuel rail. The engine block may define a cylinder bore. The cylinder head may be coupled to the engine block and may define an intake port, an exhaust port, and a centrally located fuel injector opening between the intake port and the exhaust port. The fuel injector opening may be in direct communication with the cylinder bore. The fuel injector may be located within the fuel injector opening. The fuel rail may overlay the fuel injector opening and may be in communication with a fuel supply and the fuel injector.

Abstract: A reductant delivery unit (16) is provided unit for selective catalytic reduction (SCR) after-treatment for vehicles. The unit includes a solenoid fluid injector (18) associated with an exhaust gas flow path (13). The injector has a fluid inlet (28) and a fluid outlet (30) with the fluid inlet receiving a source of urea solution and the fluid outlet communicating directly with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path. Supply structure (32) defines the fluid inlet and includes a cup (37) coupled to a body (18) of the injector and a supply tube (29) integral with the cup to define a single member. The supply tube is coupled with the source (27) of urea solution to deliver urea solution to the fluid inlet. The supply tube is heated by a heat source (33) so that an entire volume of the urea solution delivered to the fluid inlet is heated.

Abstract: A fuel system for a direct injection engine having a fuel rail and a plurality of direct injection fuel injector assemblies mounted to the fuel rail. Each fuel injector assembly includes a mounting surface and a dampener made of a resilient material is disposed around this mounting surface. A bracket is secured to the engine and has a recess for each fuel injector assembly. Each fuel injector assembly is positioned in its associated recess so that at least a portion of the dampener is sandwiched between the fuel injector assembly mounting surface and a complementary mounting surface formed on the recess. A holder secures the injector assembly in its associated recess.

Abstract: A fuel system component for a direct injection internal combustion engine. The component includes a fuel rail and a plurality of direct injection fuel injectors which are rigidly attached to the rail. Each fuel injector has an elongated body as well as a harness assembly extending laterally outward from the elongated body. Each injector is attached to the fuel rail such that, when viewed along an axis of the fuel injector body, the fuel rail overlies at least a portion of the injector body and at least a portion of the harness assembly.

Abstract: An injector mounting arrangement includes a tolerance ring assembly that provides damping or absorption capabilities in addition to alignment and centering functionality. The tolerance ring assembly is designed to absorb axial excitation energy from the injector by converting it into strain energy through the radial deformation of the tolerance ring. The strain energy is absorbed in the form of bending stress within the tolerance ring more effectively than by simply absorbing the axial forces in compression alone. As a result, vibration and noise is reduced and/or isolated.

Abstract: A coupling arrangement for coupling a fuel injector to a fuel rail of a combustion engine, has a fuel injector cup having a central longitudinal axis and is coupled to the fuel rail at a first axial end area of the fuel injector cup, a housing of the fuel injector being arranged at the central longitudinal axis facing a second axial end area of the fuel injector cup, an O-ring seal being arranged between the housing and the fuel injector cup at an axially overlapping area of the fuel injector cup and the housing, a back-up ring being arranged at least partly circumferentially the housing such as to prevent the O-ring seal to be released from the housing, and a separating element being arranged at least partly circumferentially the housing between the O-ring seal and the back-up ring to prevent a contact of the O-ring seal with the back-up ring.

Abstract: Coupling structure (10) for coupling a fuel injector to a fuel rail (16) includes a fuel injector receiving cup (14) having an outer wall (22) and an interior space (24). The cup includes slot structure (26, 28) through the outer wall. Clip structure (30, 32) has a base (31) and a wall (40) extending transversely from the base. The base is received in the slot structure and extends into the interior space so that a portion of the base engages the fuel injector to limit movement thereof both axially and radially with respect to the receiving cup, with the wall being disposed adjacent to a portion of the outer wall of the receiving cup. A retainer (41) engages the wall of the clip structure to secure the clip structure to the receiving cup.

Abstract: The present invention shows a high-pressure injector having the following assemblies: an injector unit (1), a drive unit (2) for driving the injector unit (1), preferably a high-pressure storage unit (3) for supplying the injector unit (1) with fuel, and a high-pressure connection (4). Provision is made in this respect that the high-pressure injector has a housing (5) in which a plurality of the named assemblies are arranged behind one another in the longitudinal direction of the injector, wherein the housing (5) completely envelops at least one of the named assemblies, in particular the drive unit (2) and/or the high-pressure storage unit (3). The high-pressure injector with the injector unit can be used in all types of internal combustion engines, preferably in diesel engines.

Abstract: A fuel injector-engine component assembly includes an engine component with a stepped bore defined along an axis and having a stepped bore stop surface facing axially upward. A fuel injector extending along the axis is disposed in the stepped bore and includes a fuel injector stop surface facing axially downward and axially opposing the stepped bore stop surface. An isolation ring is disposed between the engine component and fuel injector stop surfaces for axially isolating the fuel injector from the engine component. The isolation ring includes a rigid support member for limiting the axial motion of the engine component and fuel injector stop surfaces together. The isolation ring also includes a resilient and compliant isolation member located axially between the engine component and fuel injector stop surfaces to provide acoustic and thermal isolation between the fuel injector and the engine component below a predetermined pressure of the fuel injector.

Abstract: A fuel injector, a method of mounting a fuel injector, a combination injector and clamping, and a clamp are all provided for ensuring the fuel injector is mounted in a proper rotative position in an injector mounting bore of any one of multiple internal combustion engine platforms requiring different injector mounting positions. The injector includes a first alignment feature having a first geometry corresponding to a first engagement feature of the first engine platform and adapted to be engaged by the first engagement feature to secure the injector to the first engine platform. The fuel injector further includes a second alignment feature having a second geometry different from, and incompatible with, the first geometry and corresponding to a second engagement feature of the second engine platform thereby ensuring the fuel injector is circumferentially oriented in a correct rotative position required by a given engine platform.

Abstract: An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another.

Abstract: A fuel injection system includes a fuel supply rail having a supply opening. A fuel injector is coupled to the fuel supply rail and configured to control the delivery of fuel from the fuel supply rail through the supply opening. A noise filtering device engages an upstream end of the fuel injector. The noise filtering device has a projecting portion extending at least partially into the supply opening along an axis, and the noise filtering device defines a restriction passage for directing fuel from the supply rail into the fuel injector. A face seal is established at a transverse face adjacent the supply opening.

Abstract: A method and apparatus for attenuating fuel pump noise in a direct injection internal combustion engine. In one proposal, the direct injection fuel nozzle is suspended from a fuel rail in a fashion that avoids direct metal-to-metal contact between the injector and the engine block. The direct injection nozzle may also be connected to the fuel rail by a pair of spaced-apart seals which equalize the longitudinal pressure on the nozzle during operation. Enlarged diameter fuel reservoirs and/or a restricted orifice may be provided fluidly in series between the fuel pump and the direct injection nozzle in order to attenuate noise resulting from fuel pump pulsation.