An assembly for a fuel injector includes a base material, a coated region formed on a surface of the base material, an uncoated region formed on a surface of the base material, in contact with and supported by a jig, and formed to be partitioned from the coated region so as to prevent the coated region from peeling off during laser welding, and a coating material stacked in a multilayer structure on the coated region. As a result, friction reduction, high hardness, impact resistance, heat resistance, and durability of the assembly may be improved, and a portion requiring the coating may be precisely coated.

The present disclosure relates to a nozzle for a fuel injector that comprises a pivotably symmetrical nozzle member having a hollow space for introducing a nozzle needle, a nozzle tip that is provided at a longitudinal end of the nozzle member, and at least one opening for discharging fuel, and a nozzle needle arranged in the hollow space for a selective blocking of a fuel inflow to the at least one opening, wherein the nozzle needle is designed as tubular in the region of the nozzle tip and is adapted to conduct fuel in the interior of the tubular region to the at least one opening.

A valve system of a vehicle includes: a housing that is electrically conductive and made of a metal and that includes: an inlet configured to receive a fluid; an outlet configured to output the fluid; and a fluid channel fluidly connecting the inlet and the outlet; a pintle disposed within the housing and that is electrically conductive and made of a metal; a ball that is mechanically fastened to the pintle, that is configured to close the outlet, and that is electrically conductive and made of a metal; an armature that is mechanically fastened to the pintle, that is disposed within the housing, and that is electrically conductive and made of a metal; a solenoid coil that is disposed within the housing and that surrounds the pintle; and an electrically insulative material configured to insulate the pintle from the housing.

An injector nozzle having a first part having a stem and a flange, the flange having a flange surface, a body including a wall defining a hole, an annular nozzle ring having a first surface and a second surface wherein the first surface and/or the flange surface include a plurality of grooves, the stem being received in the hole, the first part being secured to the body to secure the nozzle ring in place such that the first surface engages the flange surface, the second surface engages the body, and the plurality of grooves define a plurality of injector holes.

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.

Methods and systems are provided for a fuel injector. In one example, a system may include an injector comprising two or more passages shaped to flow a mixture in opposite directions before injecting the mixture.

An injector nozzle having a first part having a stem and a flange, the flange having a flange surface, a body including a wall defining a hole, an annular nozzle ring having a first surface and a second surface wherein the first surface and/or the flange surface include a plurality of grooves, the stem being received in the hole, the first part being secured to the body to secure the nozzle ring in place such that the first surface engages the flange surface, the second surface engages the body, and the plurality of grooves define a plurality of injector holes.

A fuel injector including an especially precisely aligned valve needle. The fuel injector includes an excitable actuator for actuating a valve closure element, which forms a sealing seat together with a valve seat surface formed on the valve seat body, and has injection orifices, which are developed downstream from the valve seat surface. The valve closure element is spherical and, as a part of a valve needle which is axially movable along a valve longitudinal axis, is fixedly connected to a pin-shaped solid valve needle shaft. A contact region of the valve needle shaft and the valve closure element is situated radially outside the valve longitudinal axis and surrounds it in the form of a ring. The fuel injector is particularly suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having externally supplied ignition.

A fuel injector including a fuel injector housing (2), a valve seat (4) formed at one end of the fuel injector housing (2), and a valve body (10) disposed in the fuel injector housing (2) and operable to open and close a spray hole in the valve seat (4). The valve seat (4) includes a base portion (16) and insert portion (26) having spray holes (8) that is secured to the base portion (16).

A ball and a valve seat for a fuel injector, and a method for coating the same are provided to form a Ta—C:H—SiO functional layer having a low frictional characteristic as the outermost layer to reduce a frictional coefficient. A Mo-based material is applied to a bonding layer and a supporting layer for bonding and supporting the Ta—C:H—SiO functional layer is applied to a base material to improve heat resistance. Accordingly, only pure ionic Mo particles are deposited to form the bonding layer and the supporting layer, thereby increasing an adhesive force and a bonding force to improve durability.