A component for an injection system for mixture-compressing, spark-ignition internal combustion engines, which is used to apportion a fluid under high pressure, in particular a high-pressure line or fluid manifold. The component includes a main body on which at least one hydraulic connection is provided, at least the main body having the connection being formed by single stage or multistage forging, an interior being formed on the main body by chip-removing machining after forging and a connection channel, which intersects with the interior in an intersection region, being formed at the connection by chip-removing machining after forging. The intersection region is deburred by mechanical deburring. An injection system and a method for producing such a component are also described.

An object of the present invention is to provide a working method of an orifice, which has excellent working accuracy and high productivity in order to work an inclination portion (tapered portion) on the entire circumference of an inner wall of an orifice. Therefore, a working method of an orifice includes a first step of forming an orifice hole 54d in an orifice forming member, a second step of pressing a downstream end surface of the orifice forming member in which the orifice hole 54d opens, in a direction toward an upstream side of the orifice hole 54d by a punch 46 having a cutting blade portion 46a larger than a cross section of the orifice hole 54d. The second step causes a material of the orifice forming member to flow from an entire circumference at the downstream end portion of the orifice hole 54d to an inside of the orifice hole 54d to form a cross-sectional area reduction portion 54s in which a cross-sectional area of the orifice hole 54d is reduced from an upstream side to a downstream side.

The invention relates to a method for producing a nozzle, in which an injection orifice of the nozzle for dispensing fuel is produced by means of laser drilling, and a cavity is formed in the nozzle along the longitudinal expansion thereof. The method is characterised in that the cavity formed in the injector is produced after the injection orifice has been produced.

A fuel injector includes an injector body, and a stack within the injector body, and having a nozzle supply passage therein. The stack includes a solenoid assembly having a solenoid housing piece with a fuel bore formed therein that includes a segment of the nozzle supply passage. The solenoid housing piece includes a solenoid housing material in a base state, and a solenoid housing material in a residual compressive stressed state, with the fuel bore being formed by the solenoid housing material in the residual compressive stressed state. Residual stresses may be imparted by ballizing, nitriding, carburizing, autofrettage, or still another technique.

The present application concerns a fuel-injection metering device for a motor vehicle. The fuel-injection device include a main body with at least one through-hole, whereby the main body forms a valve seat on its inner face that is provided to interact with a valve body, whereby the inner face of the main body is electrochemically machined. The application also concerns a mould, a production method, and a fuel-injection nozzle.

A method is provided for achieving final air gap and parallelism of a control valve of a fuel injector, the control valve having a body defining an transverse top face and including a thick disc magnetic armature having a planar transverse upper face. The method includes a) measuring the actual position from the armature upper face and the body top face and, determining the actual parallelism error between said faces; and b) ablating the armature to generate an ablated upper face parallel to the body top face, the distance from the ablated upper face to the body top face being a final air gap.

The present invention relates to a method for producing an internally pressurized component (1), having the steps of: providing a main body (2) with a longitudinal cavity (3) and with an attachment flange (6) for attachment of the internally pressurized component (1), providing a (80), introducing a through-bore (7) that extends longitudinally through the attachment flange (6) and has two opposite openings (70, 71) with respect to the longitudinal axis (L7), inserting the pin (80) into the through-bore (7) such that the pin (80) is arranged flush with the attachment flange (6) on the side of one of the openings (70) and extends from this opening (70) through the through-bore (7) and through the other opening (71) in order to project from the attachment flange (6), materially bonding the pin (80) to the attachment flange (6), and introducing a longitudinal bore (81) into the pin (80) to form an attachment sleeve (8). The invention also relates to a corresponding internally pressurized component (1).

A method for manufacturing a member having a through hole includes a primary formation step, an intensity determination step, a laser modulation step, and a secondary formation step. The primary formation step includes radiating a laser beam to a workpiece member to form a pilot hole having a smaller inner diameter than the through hole while receiving light from the workpiece member at a light detection unit. The intensity determination step includes determining whether a light intensity is equal to or less than a predetermined threshold value. The laser modulation step includes modulating a spatial light phase of the laser beam the intensity of the light is equal to or less than the predetermined threshold value. The secondary formation step includes radiating the laser beam having the modulated spatial light phase to a peripheral part of the pilot hole to form the through hole.

A pump unit for feeding fuel, in particular diesel fuel, to an internal-combustion engine; the pump unit comprising a head (2) inside which a cylinder (3) is formed along an axis; a pumping piston (4) housed inside the cylinder and comprising a head portion (24) inside the cylinder and an opposite foot portion (23) projecting outside the cylinder; wherein the piston is slidable inside the cylinder in a reciprocating manner between a first position and a second position where the foot projects from the cylinder by a greater or smaller amount respectively; and wherein the outer surface of the piston comprises a portion (16) with a surface finish so as to have less friction and a greater lubricant-retaining capacity than the remainder of the outer surface of the piston; the portion extending along the axis between the head of the piston and a first intermediate point (17) in the first position of the piston, the first intermediate point being inside the cylinder.

The present disclosure relates to a method of modifying a conventional injector (e.g., a high pressure direct fuel injector) and to the modified injector resulting therefrom. The modified injector provides a fluid flow rate and/or fluid spray plume (i.e., pattern) which is different than the fluid flow rate and/or fluid spray plume (i.e., pattern) of the original conventional injector. In one embodiment, provided is a modified injector used in internal combustion engines for fuel delivery directly into the combustion chamber.