A first tubular portion forms a part of a fuel flow passage therein. A first joint surface is formed in one end surface of the first tubular portion. A first inner diameter enlarged portion is formed on a side opposite to the first joint surface. A second tubular portion forms a part of the fuel flow passage therein. A second joint surface is formed in one end surface of the second tubular portion and joined to the first joint surface. A second inner diameter enlarged portion is formed on a side opposite to the second joint surface. A welded portion is formed in an annular shape to extend radially inward from the radially outside of the first joint surface and the second joint surface by welding the first tubular portion and the second tubular portion.

A method of making a fluid injector for a gas turbine engine includes depositing material onto a piece of tube stock. The method includes machining the deposited material into a fluid injector component. Depositing can include laser cladding the material onto the piece of tube stock. The method can include placing or flowing braze into a braze joint location between the deposited material and another fluid injector component and forming the braze into a braze joint in the braze joint location.

A fuel injection valve includes a valve body, a fixed core, a movable core, a spring and a cup. The movable core has a first core contact surface which contacts the valve body when the movable core is moved by a predetermined distance away from a nozzle hole, and a second core contact surface which contacts the cup when the movable core is moved away from the nozzle hole. The movable core, the cup and the valve body form a fuel storage chamber which is surrounded by the movable core, the cup and the valve body to accumulate fuel. The first core contact surface is located inside the fuel storage chamber. The first core contact surface and the second core contact surface have a communication groove through which the inside and the outside of the fuel storage chamber communicate with each other.

An injector for injecting a fluid includes a base body having an opening and a sealing seat, a spray-orifice disk having at least one spray orifice, and a clamping ring, the spray-orifice disk being disposed in the opening of the base body, and a first nonpositive connection is provided between the spray-orifice disk and the base body, and a second nonpositive connection is provided between the base body and the clamping ring.

Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper 84) that guides movement of a valve body (discharge valve 82), a main body portion (body 1) provided with a valve chamber (discharge valve chamber 1d) that houses the regulating member, a sealing member (plug 85) that seals the valve chamber, and a welded portion (welded portion 86) that fixes the sealing member to the main body portion. An annular space portion (annular space portion 60) along an outer periphery of the regulating member is formed between the welded portion and the regulating member. The regulating member includes a positioning portion (fitting portion 84a) for positioning with respect to the main body portion on a side opposite to the sealing member, and a gap forming portion (gap forming portion 84c) forming an annular gap (annular gap 63) between the gap forming portion and the main body portion, and the annular gap allows a space on a side of the positioning portion in the valve chamber and the annular space portion to communicate with each other.

For a fuel injection device, a configuration to improve fuel sealability when a valve is closed is provided. Therefore, the fuel injection device includes: a valve body that opens and closes a fuel flow path; a movable iron core in which a fuel passage hole communicating an upstream side and a downstream side is formed, and that operates the valve body toward the upstream side; a biasing spring whose one end contacts the movable iron core, and that biases the movable iron core in a valve opening direction; and a regulating unit that regulates movement of the one end of the biasing spring, in which the shortest distance between the one end of the biasing spring and the fuel passage hole is larger than a radial travel distance of the one end until radial movement of the one end is regulated by the regulating unit.

A fuel injector includes an injector body which accommodates a pole piece of a solenoid actuator. A top portion of the injector body includes a cylindrically formed generally open-ended recessed portion. The recessed portions accommodates a generally cylindrical pole piece, wherein the pole piece includes a bore located along a central axis to provide a fuel flow path. The top portion of the pole piece includes a cylindrically formed recess so as to form a sleeve or lip portion.

A high-pressure fuel pump includes a pump housing, a receiving space in the pump housing, a pressure pulsation damper in the form of a diaphragm cell having two diaphragms, which pressure pulsation damper is arranged in the receiving space, and a holding device for holding the diaphragm cell in the receiving space. The holding device includes a connection portion, which is connected to the pump housing rigidly both in an axial direction and in a radial direction. The connection portion is fastened to the pump housing, both in the axial direction and in the radial direction, to an inner lateral surface of the pump housing that delimits the receiving space.

An injector comprises a tubular nozzle body having a nozzle side, receiving a needle valve member, and an actuator side, receiving a tubular magnetic armature and receiving an armature side of a tubular pole piece above the magnetic armature, wherein the nozzle body and the pole piece are welded together through a seam weld line between an inner tubular surface of the actuator side of the tubular nozzle body and an outer tubular surface of the armature side of the pole piece. The actuator side of the tubular nozzle body comprises a constricted area while the outer surface of the armature side of the pole piece comprises a recessed area, the constricted area and the recessed area contacting each other at a level of the seam weld line and providing a friction area transmitting hydraulic load away from the seam weld line.

A method of making a fluid injector for a gas turbine engine includes depositing material onto a piece of tube stock. The method includes machining the deposited material into a fluid injector component. Depositing can include laser cladding the material onto the piece of tube stock. The method can include placing or flowing braze into a braze joint location between the deposited material and another fluid injector component and forming the braze into a braze joint in the braze joint location.