Abstract: An improved fuel rail for delivering fuel to a fuel injector for an internal combustion engine is provided that reduces the weight of the fuel injection system, greatly reduces manufacturing costs by eliminating expensive manufacturing methods, such as brazing, high heat welding, post plating, blow molding, and extrusion, and enhances low-cost, low-energy methods for attachment of fuel system components to the fuel rail. The improved fuel rail includes an tubular body defining a fluid chamber and having an inlet through which fuel enters the fluid chamber and a fuel injector port in fluid communication with the fluid chamber. The port is configured to receive the fuel injector. The tubular body is formed as a laminate having an inner metallic layer and an outer polymeric layer. The inner metallic layer may comprise aluminum and the outer polymeric layer may comprise nylon. Plastic or metal components can be attached to the laminated tubular body while providing a fluid tight, pressurized joint.

Abstract: A fuel injection rail has a rail body formed by joining together a first body member having the shape of a trough and a second body member having the shape of a flat plate. Edges of the side walls of the first and the second body members are joined in folded seams by folding the edges of the first body member so as to crimp the edges of the second body member, and the folded seams are brazed.

Abstract: A flange 10 is provided for a fuel pump module for a vehicle. The flange includes a first portion 12 of acetal material and a second portion 14 of an acid resistant material provided directly over at least certain regions of the first portion 12.

Abstract: Embodiments include a fuel rail and method for making the fuel rail. Embodiments of the fuel rail include an elongate tubular body with a wall defining a lumen, the elongate tubular body formed with a thermoset composite material, and a pressure port having a lumen in fluid communication with the lumen of the elongate tubular body.

Abstract: A fuel-injection system (1, 1?, 1?, 1??) for an internal-combustion engine (2), of the type provided with compressor mechanism (4) for making available the fuel at a high pressure to an storage volume (7), and a plurality of injectors (8, 8?, 8??) fluidically connected to the storage volume (7) for taking in the fuel from the storage volume (7) and injecting it into respective combustion chambers (12) of the engine (2). The storage volume (7) is advantageously split into a plurality of distinct elementary storage volumes (9, 9?, 9a, 9b) fluidically connected to one another.

Abstract: An object of the invention is to provide a fuel injector delivery pipe which does not require a tool for holding an upper part and lower part together, and thereby eliminate the process of attaching and removing the tool, and increases the efficiency of the operation. Furthermore, in order to achieve this object, the fuel injector delivery pipe comprises an upper part 2 with an inverted substantially U-shaped vertical cross-section in the longitudinal direction formed with a top wall 2a and two side walls 2b, 2b, and also comprises a lower part 3 with a substantially U-shaped vertical cross-section in the longitudinal direction with a bottom wall 3a and two side walls 3b, 3b. Locking parts 5, 10 are formed in both side walls 2b, 2b of the upper part 2 and in both side walls 3b, 3b of the lower part 3 respectively for locking together the walls, and the locking parts 5, 10 are locked together to temporarily lock the upper part 2 and the lower part 3 together while the parts are integrated by brazing.

Abstract: A ring-shaped connecting portion is formed on a seat surface side of a pipe connector. The connecting portion is tapered so that thickness thereof gradually reduces toward a tip end thereof. A protrusion is formed on the tip end of the connecting portion. A ring-shaped groove is formed on a flat outer peripheral surface of a common rail. By fitting the protrusion into the groove, the connector can be positioned to a predetermined position of the common rail. In this structure, current can be concentrated to the protrusion and current density can be increased. As a result, sufficient bonding strength can be attained.

Abstract: A fuel routing structure for use in a vehicle having a V-type engine is provided. The structure has fewer parts, is compact, and facilitates ease of assembly and maintenance for a vehicle where fuel injection valves are attached to an intake manifold, which contains an intake passage communicating with intake ports of a pair of cylinder banks. Each fuel injection valve is attached to an upper part of the intake manifold, so that center lines of the fuel injection valves corresponding to both banks are crossed at an intersection over the intake manifold when a vehicle is viewed from the side. A fuel rail is provided with a fuel passage pipe, the axis of which is arranged in the vicinity of the intersection of the center lines of the fuel injection valves. The axis of the fuel passage pipe may be parallel to the crankshaft and may extend linearly and connected to all the fuel injection valves.

Abstract: The invention relates to a method for producing a fuel accumulator line and a fuel accumulator line comprising prestressed connection pieces. The connection pieces are mounted onto the fuel accumulator line with a prestress, by crimping, or by a temporal expansion and/or a temporal contraction of the fuel accumulator line. The connection pieces connect a line to the fuel accumulator line. The prestressing of the connection pieces allows pressure to be exerted on the fuel accumulator line, thus increasing the compressive strength.

Abstract: A high pressure fuel injection tube includes a connection head with a seat face in a spherical shape. A ring-like flange is spaced from the seat face in an axial direction. A conical portion is formed in the interval between the ring-like flange and the seat face. An undercut bent recess groove with a ring-like shape and a deep depth is formed on the conical portion. Thus, a shallow smooth ring-like recess groove is formed on an inner side of the connection head, and a compressive residual stress is present at an inner peripheral face of the ring-like groove.

Abstract: A fuel manifold for the direct injection of fuel into an internal combustion engine comprising a head provided with a number of cylinders, a number of injectors, each of which is connected to the fuel manifold and is adapted directly to inject the fuel into a respective cylinder, and an intake manifold, which is connected to the head in order to supply fresh air to the cylinders, the fuel manifold being formed by a single monolithic body which is made from thixotropic aluminum by means of a pressure die casting process and comprises a supply duct adapted to distribute the fuel to the injectors, and a flange disposed laterally to the supply duct, the flange being adapted to be secured by a plurality of screws to the head of the engine and comprising a number of coupling members each of which is adapted to bring a respective cylinder into communication with the intake manifold.

Abstract: An internal combustion engine for a motor vehicle with a cylinder head, an intake manifold, and a fuel distributor rail. The downstream end of the intake manifold is connected by a flange to intake channels in the cylinder head of the internal combustion engine. The fuel distributor rail is located at the downstream end of the intake manifold and is connected to fuel injection valves. The internal combustion engine is installed in the motor vehicle in such a way that the intake manifold is located on the side of the cylinder head on which the external crash force will act during a crash. A protective strap, which extends at least over the entire width of the flange, is attached to the cylinder head.

Abstract: A high-pressure fuel injection pipe, which has an outside diameter (?) of 6.35 mm, an inside diameter (?) of 4.35 to 2.95 mm, and a wall thickness (t)of about 1.0 to 1.7 mm, can serve as a high-pressure fuel injection pipe for in-cylinder injection type gasoline engines which have an injection pressure of 4 to 20 MPa, and can adequately endure the use of low-grade gasoline, sour gasoline, DME (dimethyl ether), alcohol, alcohol blended fuel, etc. is provided. The high-pressure fuel injection pipe is manufactured by joining an outer pipe which is an seam-welded pipe or a seamless pipe and an inner pipe which is an seam-welded pipe with a Ni or Ni base alloy film on its inner peripheral surface, closely adhering them together by means of elongation.

Abstract: A fuel rail cup is provided with a lead-in volume of one-third a receiving volume of the fuel rail cup that allows insertion of an O-ring mounted on a fuel injector inlet to be inserted at 20 pound-force or less. A method of inserting the fuel injector inlet with an O-ring surrounding the fuel injector inlet into a receiving volume of a fuel rail cup is also provided.

Abstract: A fuel supply apparatus is provided for an intake manifold and a fuel injection system that can be easily and reliably mounted together by a mounting structure, even when the intake manifold has an integrated design in which air intake branches curve steeply upward from a downward side to an upstream side. With this fuel supply apparatus, the fuel injection system is mounted with coupling bolts on the top surface of the outer wall of the downstream portion of the intake manifold. The threads of the bolts engage internal threaded bores in the fuel injection system. The heads of the bolts are disposed on a reverse side of a top surface of an outer wall of the intake manifold, with internal threaded bores of the fuel injection system being disposed on a side of the top surface of the outer wall of the intake manifold.

Abstract: An inlet port 16 communicating with the interior of a fuel delivery pipe body 10 to introduce fuel is made open in a center of a tubular joint 11 having a smaller diameter than an inside diameter of a holder portion 15 of an injector 32 connected to a respective pipe end portion 25, and a length from a center of this inlet port 16 to the pipe end portion 25 is set to 30 to 1000 mm, to thereby form the tubular joint 11. The tubular joint 11 and the fuel delivery pipe body 10 are fixed such that the inlet port 16 of this tubular joint 11 is communicatable with the interior of the fuel delivery pipe body 10.

Abstract: An injection nozzle for an internal combustion engine has a valve member moveable within a bore of a nozzle body, and a seating surface defining a seat cone angle the valve member including a first frustoconical valve region, a second frustoconical valve region, and an annular groove defining, in part, a delivery chamber in communication with at least one nozzle outlet. The annular groove is disposed intermediate the first and second valve regions such that a first seating line is defined at the mutual interface between the first valve region and the annular groove and is engageable with the seating surface to control delivery of fuel from a first supply chamber to the deliver chamber, and a second seating line is defined at the mutual interface between the second valve region and the annular groove and is engageable with the seating surface to control delivery from a second supply chamber to the delivery chamber.

Abstract: To improve design freedom of fuel supply piping in a V-type engine, and avoid heat from cylinders, first and second fuel distribution pipes (8, 9) are arranged in one side walls (1a, 3e) and the other side walls (1h, 3a) respectively of first and second throttle bodies (1, 3), first and second fuel injection valves (J1, J2) are held to the one side wall (1a) and the other side wall (3a) respectively, first and second fuel connection pipe portions (8e, 9e) protrude toward the other direction X from a first fuel passage boss portion (8a) of the first fuel distribution pipe (8), and one direction Y from a second fuel passage boss portion (9a) of the second fuel distribution pipe (9) respectively, and the first and second fuel connection pipe portions (8e, 9e) are connected to a fuel coupling pipe (13) above inflow ends (1g, 3g) of the first and second throttle bodies and between facing walls (1d, 3d).

Abstract: The invention relates to a fuel charging system having pressure pulsation damping. The fuel charging system includes a first side rail connected to a second side rail by a crossover tube. Defined within the crossover tube are first and second passageways; the first passageway including a restricted flow section therein.

Abstract: To simplify fuel piping for connecting a fuel distribution pipe and a fuel pump in a throttle body comprising two fuel injection valves, a fuel supply pipe F comprises a first fuel supply pipe 1 having a fuel flow-in passage 1b projected from a first cylindrical portion 1a, a first inserting pipe 1c projected in one side direction X, a fuel flow-in passage 1d, and a first fuel supply passage, a second fuel supply pipe 2 having a second insert pipe 2b projected in the direction X from a second cylindrical portion 2a and fuel supply passage 2c, and a fuel connecting pipe 3 connecting the fuel flow-in passage 1d and the second fuel supply passage 2c, and the first and second inserting pipes 1c, 2b are inserted into first and second inserting holes 6d, 7d opened toward another side direction Y from a second fuel distribution pipe 7 respectively.

Abstract: A fuel injection device for supplying high-pressure fuel to an internal combustion engine includes a fuel supply pump, a first common rail and a second common rail. High-pressure fuel is directly supplied to the first common rail and then to the second common rail from the first common rail through a connecting passage having an orifice. The high-pressure fuel accumulated in the common rails is supplied to injectors and is injected into cylinders in a controlled manner. To suppress pressure wave propagation from the first common rail to the second common rail while providing an appropriate flow passage size, a passage diameter of the orifice is set to 0.9 mm–1.3 mm. In this manner, a pressure difference between the first common rail and the second common rail is minimized.

Abstract: A fuel delivery system is provided having a fuel rail with an outlet. A fuel injector is provided having a body with an outlet and a generally tubular inlet. The tubular inlet of the fuel injector is generally axially slideable into the fuel rail outlet. The fuel injector outlet has a generally noncircular cross-sectional shape and is torsionally restrained by the fuel rail outlet.

Abstract: An outboard motor comprises an engine disposed inside an outer cover, an intake unit provided for the engine and including a throttle body disposed in a vicinity of a crankcase of the engine and an intake manifold disposed on a side of the engine so as to extend from the throttle body, the intake manifold having a plurality of intake pipes extending towards intake ports formed in a cylinder head of the engine, and a fuel injectors disposed in substantially intermediate portions of the respective intake pipes.

Abstract: A fuel-supply manifold assembly has a thin-wall tube extending along a tube axis and formed with a plurality of radially throughgoing ports and respective saddle fittings each formed with a face complementary to and fitting with an outer surface of the tube at a respective one of the ports and with a throughgoing passage having an inner end aligned with the respective port. Respective tubular alignment nipples each have a throughgoing passage and each further have an inner end seated in a respective one of the ports and an outer end seated in the inner end of the respective fitting.

Abstract: To improve the maintenance and inspection of a fuel injection valve, as well working of the fuel piping and wiring to the fuel injection valve. An engine fuel injection apparatus includes an air chamber provided on an upstream end of an air intake passage of an engine. A first fuel injection valve for injecting fuel toward the upstream end of the air intake passage is provided on a wall of the air chamber facing a wall connected to the upstream end of the air intake passage. The fuel piping and wiring to the first fuel injection valve is located outside of the air chamber. The air chamber also serves as an air cleaner case provided with a filter element therein.

Abstract: A vehicle fuel intake system (10) includes an intake manifold (14), an injector pack assembly (18) and an air cleaner assembly (16). The injector pack assembly (18) includes an encapsulated lead frame (36) that provides electrical communication to fuel injectors (26). The intake manifold defines a fuel rail (22) and a cavity (24). Fuel vapors permeating from the fuel rail (22) are trapped in the cavity (24) and channeled back into the air intake passages (20). The air cleaner assembly (16) includes a filter (28) for absorbing fuel vapor emissions from unburned fuel escaping a non-operating engine (12). An actuator (30) moves the filter (28) between an open and closed position. Once the engine begins operation, the actuator (30) opens the filter (28) to allow unrestricted airflow through the intake manifold (14).

Abstract: In a common rail for accumulating highly pressured fuel, a cylindrical body is provided with a chamber for accumulating highly pressured fuel and a delivery port which connects the chamber to the outer circumference thereof and communicates via a pipe-joining unit with a conduit in a distribution pipe. The longitudinal center axes of the chamber and the cylindrical body are disposed substantially coaxially with each other, and each of the longitudinal center axes of the delivery ports and the longitudinal center axis of the cylindrical body are skewed to each other. Accordingly, the durability of the cylindrical body is improved, and the thickness of the cylindrical body is uniform and the forging form of the cylindrical body becomes symmetric. The length of the delivery port is extended so that the durability of the cylindrical body is improved.

Abstract: An apparatus for protecting a fuel system component disposed on an engine body in a vehicle, the apparatus including a protector including a first wall and a second wall connected with the first wall. The first and second walls extend toward the engine body and cooperate with each other to surround the fuel system component. The second wall has one end opposed to the engine body with a clearance. A first fastening member fixes the first wall to the engine body.

Abstract: Cylinder heads (100a to 100f are respectively provided with fuel injectors (101a to 101f). Each of the fuel injectors (101a to 101f) is connected to each of joints (105a to 105f) in a common rail (105) extending linearly through fuel injection pipes (103a to 103f). In this example, it can be achieved to allow all the fuel injection pipes (103a to 103f) to have the same length by crossing the injection pipes (103b, 103c, 103d and 103e) to connect. With this configuration, it is possible to reduce the irregularities in the amount of fuel injection and to enhance the engine performance.

Abstract: To manufacture fuel piping for connecting a fuel tank and a drive unit including an engine using a resin material at a low cost and to cause the fuel piping to suitably follow the movement of the fuel tank and the drive unit when the vehicle is being operated. A fuel piping includes connectors at both ends of a pipe member formed of resin material into a thin tubular shape for connecting between a fuel tank and a fuel injection apparatus for supplying fuel to an engine of a two-wheel vehicle or the like via the connectors. One or more bent portions are formed at the midsection of the pipe member of the fuel piping.

Abstract: A fuel rail for a fuel-injected internal combustion engine includes an elongated tube having a longitudinal axis, an overall length and a cross-sectional shape along a substantial portion of the length of the tube. The cross-sectional shape is a closed curve, wherein all portions of the cross-sectional shape curve outwardly from the longitudinal axis, and the shape has a non-constant radius. The fuel rail also includes at least one fuel outlet for communicating with a fuel injector.

Abstract: A fuel rail assembly with crossover conduits for communicating fuel between two fuel rails of a fuel-injected, spark ignited internal combustion engine is provided. The hose has a body with a mechanism for damping pressure pulsations within the fuel rail assembly.

Abstract: A juncture and method for changing direction of fuel flow in a high pressure fuel injection system such as a common rail and/or a fuel pump, the juncture comprising a body, a first passage formed in the body having a first diameter and a longitudinal axis extending therethrough, the first passage including a groove positioned along a portion of the longitudinal axis, and a second passage formed in the body having a second diameter, a central axis extending therethrough, and an opening, the opening of the second passage being provided in the groove of the first passage to allow fluidic communication between the second passage and the first passage so that stresses at the juncture caused by high pressure fuel changing direction of flow is reduced.

Abstract: To improve the maintenance and inspection of a fuel injection valve, as well working of the fuel piping and wiring to the fuel injection valve. An engine fuel injection apparatus includes an air chamber provided on an upstream end of an air intake passage of an engine. A first fuel injection valve for injecting fuel toward the upstream end of the air intake passage is provided on a wall of the air chamber facing a wall connected to the upstream end of the air intake passage. The fuel piping and wiring to the first fuel injection valve is located outside of the air chamber. The air chamber also serves as an air cleaner case provided with a filter element therein.

Abstract: In a fuel supply system constituted such that there is disposed a saddle type fuel tank provided with a main chamber and an auxiliary chamber on both sides of an upwardly protruding center portion of a bottom face thereof, a fuel transfer tube which is mounted to lie over the protruding portion of the fuel tank, is connected to a fuel introduction port of a jet pump disposed on a main chamber side, to pump fuel in the auxiliary chamber via the fuel transfer tube, at least a part of the fuel transfer tube is formed by arranging alternately a plurality of bellows portions each of which cross section is changed, and a plurality of straight portions each of which cross section is fixed.

Abstract: A fuel rail assembly configured for coupling to an engine, the fuel rail including a body having therein a fuel passageway, and a fuel injector coupled to the body and in fluid communication with the fuel passageway. A portion of the body is configured to interconnect with the engine assembly to secure the fuel rail assembly to the engine without using conventional threaded fasteners.

Abstract: The interior of the drawn, rolled or forged pipe (1) forms a high-pressure reservoir (2) comprising pressure lines (4), which are respectively connected to the reservoir by means of a transversal bore (3). The sealing body (7) of an end connection presses against a bearing surface (8) of the pipe (1) to form a seal by means of a force transmission element (9, 10, 13) that is provided with a thread. To reduce axial installation space and to improve the tensioning conditions, the sealing body (7) and the force transmission element (10, 13, 18) are arranged at least partially parallel to one another in the axial direction.

Abstract: An air fuel delivery system arrangement for an engine is provided, including an air manifold body, having a first set of runners for a first cylinder bank with inlets on a first side and outlets on a second side of the manifold body and a second set of runners for a second cylinder bank with inlets on a second side and outlets on a first side. And a first fuel rail is included, having outlets for connection with fuel injectors for delivering fuel to the first cylinder bank being positioned generally between the inlets of the manifold body. A second fuel rail is also included, having outlets for connection with fuel injectors for delivering fuel to the second cylinder bank being positioned generally between the inlets of the manifold body being generally vertically aligned with the first fuel rail.

Abstract: An accumulator fuel system for an internal combustion engine having a plurality of engine cylinders, includes an accumulator fuel volume for supplying high pressure fuel to one or more of a plurality of injectors, each of which is arranged to supply fuel to an associated one of the engine cylinders. The accumulator fuel volume is integrated within an engine component, where the engine component provides a purpose other than that solely of an accumulator volume for storing high pressure fuel. The accumulator fuel volume is therefore defined in an existing engine component, to reduce part count, weight and cost. In one embodiment the accumulator fuel volume is defined within a rocker shaft of the engine and in another embodiment within the engine cylinder head.

Abstract: An injection module assembly includes a fuel rail defining a passageway through which a fuel can flow, and a plurality of fuel injectors for delivering the fuel in the passageway to a respective plurality of combustion chambers in an internal combustion engine. The fuel injectors are coupled to the fuel rail such that an interface between the fuel rail and each fuel injector is substantially sealed to substantially prevent leakage of both liquid fuel and hydrocarbon emissions from the interface. The injection module assembly further includes an electrical connector coupled to the fuel rail and to each of the injectors for providing electrical power to each injector, and an overmolding covering at least a portion of the fuel rail, at least a portion of the electrical connector, and at least a portion of each fuel injector.

Abstract: A hydraulic pulsation damper system for installation into an otherwise rigid hydraulic system to absorb and extinguish pressure pulsations being transmitted through the system by hydraulic fluid contained therein. The system is useful in suppressing pulsations in automotive fuel lines supplying fuel to fuel injection systems. The system includes fuel-conducting tubing made of flexible, non-permeable material that includes a convoluted central portion capable of expanding and contracting in response to pulsations in the fuel. Resilient foam is molded around the convoluted portion for controlling expansion of the convolutions. The foam and convoluted tubing are contained within a housing made from a larger-diameter hose having ends sealed as by swaged connectors. The damper system may be bent to accommodate installation with a fuel line in an engine and can conveniently provide a sound-deadening link in the fuel line of a vehicle between a body-mounted portion and an engine-mounted portion thereof.

Abstract: A fluid rail for conveying an actuating fluid under pressure from an actuating fluid source to a respective fuel injector of an internal combustion engine includes a rail assembly being disposable in a space defined in part by a rocker arm carrier of the engine and having; a. a first rail portion having a substantially cylindrical inside diameter defining a first substantially cylindrical flow passage; b. a second rail portion having a substantially cylindrical inside diameter defining a second substantially cylindrical flow passage; c. having a volume of between 15 cubic inches and 60 cubic inches. A method of conveying an actuating fluid under pressure from an actuating fluid source to a respective fuel injector of an internal combustion engine is further included.

Abstract: A fuel tank includes fuel pipes which are configured to resist bubble disruption of the fuel pump, minimizing the risk of fuel running out when the tank level becomes low. The fuel tank includes a fuel tank body with a fuel feed conduit operatively attached thereto, for feeding fuel to a fuel injection system. The fuel feed conduit has a pickup inlet which opens into the fuel tank body, allowing fuel to be drawn outwardly by a fuel pump of the fuel injection system. The fuel tank also includes a fuel return conduit with a return port inside the fuel tank body, for returning unused fuel therethrough to the fuel tank body. The return port of the fuel return conduit is directed toward the pickup inlet of the fuel feed conduit. The fuel feed and return conduits may be fixed to the fuel tank body using a plate-shaped member.

Abstract: High pressure fluid systems, such as those found in common rail fuel systems for engines, often need a low pressure containment system to appropriately address the possibility of fuel leakage around the engine. In addition, such high pressure systems also often require flow to go from one location, such as the common rail, to another location, such as a fuel injector, while undergoing a direction change because of spacial constraints around the engine. The present invention utilizes an elbow component with valve surfaces on its two faces that are oriented at about 90° with respect to one another. When the elbow component is fastened to the head with first fasteners and fastened to a flow limiter housing in another direction with second fasteners, a quill tube is compressed between the valve surface on the elbow component and a similar conical seat on a fuel injector in one direction while also compressing a short tube and flow limiter between the other valve surface of the elbow component and the common rail.

Abstract: The invention relates to a fuel system having pressure pulsation damping. The invention specifically locates restrictors in relation to identified critical elements of the system to control the maximum operating system pulse magnitude, as well as dampening the overall pulsations of the system.

Abstract: The invention relates to a high pressure fuel accumulator for an accumulator injection system in internal injection engines, comprising a base body which is provided with a longitudinal recess which has a plurality of connecting bores emanating therefrom. The inner chamber of the longitudinal recess is essentially cylindrical in shape and has at least one rib shaped section on the inner perimeter of the longitudinal recess into which a connecting bore formed in the longitudinal recess leads.

Abstract: A fuel-injection system for injecting fuel into an internal combustion engine, having at least one fuel injector and a fuel-distributor line, is provided for each fuel injector with a connecting piece, which is connectable to an inflow section of the fuel injector. The connecting piece is connectable to the fuel injector via a screw connection made up of a screw cap and a thread. A retaining sleeve is able to be slipped with form locking over the screw cap and a counter-hold section, matched in form, on the side of the thread, in order to prevent a twisting of the screw cap and the thread relative to one another.

Abstract: A fuel injection nozzle is proposed, in which an inner nozzle needle and an outer nozzle needle can be actuated independently of one another. Upon opening of the outer nozzle needle, a stream of fuel is injected into the combustion chamber in the direction of the longitudinal axis of the fuel injection nozzle, while upon opening of the inner nozzle needle, the fuel is injected laterally into the combustion chamber.

Abstract: In a high pressure fuel injection pipe, pipe extension and heat treatment are repeated by using a header manufactured by transformation induced plastic type strength steel. A process for depositing residual austenite is then performed, after which a final pipe extension process is performed, and the joint portion is molded and bending processing is performed without performing perfect annealing at the size of a product.

Abstract: The fitting has a high-pressure fuel supply conduit, and the injector has a hollow body having a threaded seat engaged by a threaded portion of the fitting. The fitting has a shoulder located between the threaded portion and another portion of the fitting, and the hollow body has a shoulder on a non-recessed outer surface of the hollow body. The two shoulders are precision machined so they are parallel in use; and the usual high-pressure fuel sealing washer is inserted between the two shoulders so machined. More specifically, the shoulder of the fitting has a groove housing the washer, and the shoulder of the hollow body undergoes circular spot facing to form a series of circular cavities concentric with the axis of the threaded seat and characteristic of Ra=1.6 surface roughness.