A system for sealing a plurality of orifices through a wall of a vessel is provided. The system includes a plurality of sealing members configured to releasably seal respective orifices of the plurality of orifices. The system also includes a base defining a central axis therethrough. The base includes a plurality of segments disposed about the central axis. Each of the plurality of segments includes an outer surface and an inner surface. The inner surface is configured to engage at least one sealing member of the plurality of sealing members. Further, each segment of the plurality of segments is configured to deform toward the central axis on application of a force upon the outer surface thereof to bias the at least one sealing member into sealing engagement with a respective orifice of the plurality of orifices.

A single-piece component for a magnetic actuator, in particular for fuel injection, including an internal pole, a magnetic sleeve, and a non-magnetic separating sleeve, the internal pole, the magnetic sleeve and the separating sleeve being integrated into the single-piece component. A method for manufacturing a single-piece component for an magnetic actuator with the aid of a two-component powder injection molding method.

The invention relates to a fuel metering device for regulating the delivery rate of a high-pressure fuel pump of a fuel injection device for an internal combustion engine. The fuel metering device has a control valve actuated by an electromagnet and having a valve member. The electromagnet has an armature and an armature rod and the armature rod is axially movably supported in at least one bushing. The at least one bushing is designed as a solid, one-piece metal component. The bushing is preferably made of steel and the bearing surface thereof, in which the armature rod is supported, has a nitrocarburized and polished surface layer.

It is important not to form the partial bump in the collision structural part, however the fixed core and the movable core are relatively inclined due to an accumulation of tolerances and therefore even if each collision structural part of the fixed core and the movable core in formed in a flat shape, the fixed core and the movable core are contacted with not the whole of the collision structural parts but a part of the collision structural parts at the moment of the collision. In a case in which the collision structural part is formed in a ring shape or an intermittent ring shape, the fixed core and the movable core are contacted with each other at outer peripheral parts. Thus, when the fixed core and the movable core are collided with each other, a high stress is applied to the outer peripheral parts contacted first. Accordingly, the shape of the outer peripheral parts of the collision structural parts is important, however since such a part, which is a tiny protruding shape, requires high processing accuracy, to reduce stress occurred during collision while keeping productivity is difficult. In the present invention, an R-shaped part and a flat part are provided in order from an outer peripheral side of a collision structural part. Further, the R-shaped part and the flat part are connected in a tangent manner.

An injector sleeve adapted to be mounted in a cylinder head of an internal combustion engine, where the injector sleeve comprises a tapered inner surface which constitutes a sealing surface for an injector, where the hardness of the tapered inner surface is higher than the hardness of the outer surface of the injector sleeve. The injector sleeve is produced in a cold forming process. The advantage of the invention is that the injector sleeve is provided with a sealing surface for an injector which is harder than the outer surface of the injector sleeve. In this way, a sealing surface for an injector having small tolerances is obtained without further machining, where the outer surface may be turned to the desired dimensions.

There is provided a valve assembly comprising a valve housing. The valve housing comprises a fluid inlet, a fluid outlet, a valve opening, and a valve seat surrounding the valve opening, The valve opening is disposed between the fluid inlet and the fluid outlet. The valve assembly further comprises a ball valve element disposed within the valve housing, a spring arranged to urge the ball valve element onto the valve seat to close the valve opening, and a drive pin having a first end and a second end, the drive pin being aligned with the valve opening. The valve assembly is movable between a closed position, in which the ball valve element is held in the valve seat by the spring, closing the valve opening, and an open position, in which the first end of the drive pin extends through the valve opening to push the ball valve element away from the valve seat, opening the valve opening. At least one of the spring, ball valve element, valve seat, and first end of the drive pin includes a hard surface treatment. There is also provided a fluid injection system for injecting a fluid comprising a source of a fluid and a valve assembly, the source of a fluid being connected to the fluid inlet of the valve assembly.

A fuel injector and a nozzle for a fuel injector is provided. The nozzle is fabricated from a hardened nozzle body blank. The hardened nozzle body blank is machined to leave a hard wear resistant layer on the exterior surface of nozzle body blank. The nozzle includes at least one spray hole that is formed through the hard wear resistant layer on the exterior surface of the nozzle body blank.

A steel pipe for a fuel injection pipe has a chemical composition consisting of, by mass %: C: 0.17 to 0.27%, Si: 0.05 to 0.40%, Mn: 0.30 to 2.00%, P: 0.020% or less, S: 0.0100% or less, O: 0.0040% or less, Ca: 0.0010% or less, Al: 0.005 to 0.060%, N: 0.0020 to 0.0080%, Ti: 0.005 to 0.015%, Nb: 0.015 to 0.045%, Cr: 0 to 1.00%, Mo: 0 to 1.00%, Cu: 0 to 0.50%, Ni: 0 to 0.50%, V: 0 to 0.15%, and the balance: Fe and impurities. The metal micro-structure consists substantially of tempered martensite, or tempered martensite and tempered bainite. The hardness is within the range of 350 to 460 HV1. A lattice spacing of a (211) diffraction plane measured by CoK characteristic X-ray diffraction is 1.1716 or less, and a half-value width of the (211) diffraction plane is 1.200 or less. The number density of cementite having a diameter of 50 nm or more is 20/m.sup.2 or less.