There is provided a manufacturing method of a hollow composite magnetic member having weakened magnetism in a portion of a ferromagnetic hollow member, the method includes: a step of forming a weak-magnetic area having weakened magnetism by melting and mixing a Ni-containing material and the hollow member by continuously supplying the Ni-containing material to a portion of the hollow member and heating the irradiation area having a line segment shape with the laser beam. Accordingly, since it is possible to prevent drop of a local portion of a hollow ferromagnetic pipe from being easily generated by a weak-magnetization treatment, to greatly reduce deformation generated by laser irradiation, and it becomes unnecessary to adjust the shielding gas pressure inside the pipe, the weak-magnetization treatment can be performed with higher efficiency and higher quality.

The present disclosure relates to a ball and a valve seat for a fuel injector, in which an SiO-DLC functional layer having low friction properties is formed as an outermost layer in order to reduce a friction coefficient, a Mo-based material is applied to a bonding layer and a supporting layer for bonding the SiO-DLC functional layer to a base material and supporting the same to improve the heat resistance thereof, and only Mo particles of a pure ion state are deposited so as to form the bonding layer and the support layer, such that adhesive force and bonding force are increased to thus improve durability; and to a method for coating the same.

A fuel injector is described which is able to be preassembled in a receiving opening of a fuel-distributor line in a loss-proof manner in a structural unit in the form of a fuel charge assembly for transport to the final assembly at the vehicle manufacturer. A radial support disk for preventing the loss of the fuel injector is disposed on the inflow-side end of the inlet pipe by press-fitting the radial support disk in the receiving opening. 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.

Provided are a flow volume control device capable of securing a strength withstanding a high fuel pressure, and a method for manufacturing the flow volume control device. A fuel injection valve 1 includes a movable element 102 and a nozzle holder 101 that is positioned on the outer peripheral side of the movable element 102 and holds the movable element 102 inside in a radial direction. The nozzle holder 101 is molded using precipitation hardening stainless steel as a material. In addition, the manufacturing method includes forging and molding a material by forging using the precipitation hardening stainless steel as the nozzle holder 101, performing solution thermal treatment on the material after the forging and molding step, and performing precipitation hardening thermal treatment on the material after the solution thermal treatment, and finishing and molding the material after the precipitation hardening thermal treatment.

A fuel system, comprising at least one fuel component formed of a steel alloy comprising 0.01-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum, wherein the at least one fuel component is configured to come in contact with fuel when fuel is ran through the fuel system.

An engaging projection of a valve body engages with an interlocking groove of a nozzle plate and the nozzle plate is rotated relative to the valve body. The engaging projection moves in a lateral groove of the interlocking groove while elastically deforming an arm part (elastically deformable portion), and the engaging projection is accommodated in a recess (lock position in the interlocking groove) of the arm part. A bottom surface of the recess of the arm part is pushed against the engaging projection of the valve body by the elastic force of the arm part, and the engaging projection of the valve body is seated and fixed on the bottom surface of the recess of the arm part. Accordingly, the nozzle plate is fixed to the valve body while being retained via the engaging projection and the interlocking groove (interlocking means).

The present disclosure relates to internal combustion engines. Various embodiments may include an electromagnetic injection valve, particularly a solenoid type fluid injection valve for automotive applications. For example, an electromagnetic injection valve may include: an inlet tube; a valve body having a longitudinal axis and a cavity in which a valve needle moves; an upper magnetic ring press-fitted with the inlet tube or the valve body; a lower magnetic ring press-fitted with the valve body; and a housing part surrounding an electromagnetic actuator unit for moving the valve needle. The lower magnetic ring is positioned on the valve body in such a way that an upper side of the lower magnetic ring is in close contact with an underside of the housing part. The electromagnetic actuator unit abuts the upper magnetic ring and the lower magnetic ring on opposite axial sides. The housing part and/or the lower magnetic ring comprises a cut extending along the axis.

A decoupling element for a fuel-injection device has a low-noise and pivotable construction. The fuel-injection device includes at least a fuel injector and a receiving bore in a cylinder head for the fuel injector as well as the decoupling element between a valve housing of the fuel injector and a wall of the receiving bore. The decoupling element is in the form of a ring, in particular a closed ring, which has a lower end face that sits on a shoulder of the receiving bore, and which has an upper end face that rises conically from radially outside toward radially inside and is in intimate contact with a spherically curved shoulder area of the valve housing of the fuel injector. The fuel-injection device is particularly suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing combustion engine having externally supplied ignition.

A vehicle component includes a surface that is configured to contact a fuel containing ethanol and zinc ions. A sacrificial carbon layer is disposed on the surface. The sacrificial carbon layer has a thickness of greater than or equal to about 250 nm to less than or equal to about 5 m. The sacrificial carbon layer includes carbon that is configured to complex and solubilize ZnO deposited on the surface, wherein the ZnO forms from the zinc ions carried by the fuel.

Methods and systems are provided for a diesel fuel injector for an internal combustion engine is provided. The diesel fuel injector comprises an injector nozzle body, the injector nozzle body comprising a first thickness of material, wherein an injection passage for injecting fuel using the fuel injector is formed in the first thickness of material, the injection passage defining an opening through which fuel is sprayed from the injector; and a second thickness of material, wherein the second thickness of material forms an outer surface of the injector nozzle body and wherein the second thickness of material extends around the injection passage, spaced apart from the injection passage opening, such that condensation forming on the outer surface of the injector nozzle body is positioned away from the opening of the injection passage. A method of manufacturing a diesel fuel injector is also provided.