Continental Automotive Gmbh

Vitesco Technologies Gmbh

Cpt Zwei Gmbh

Cpt Group Gmbh

Ivano Izzo

Luca Matteucci

Filippo Falaschi

Marco Mechi

Cedric Louis Adrien Leger-Cartier

Gianluigi Manzo

Christoph Hamann

Matteo Soriani

Anatoliy Lyubar

Antonio Agresta

Luigi Gargiulo

Xaver Gebhardt

Marco Omeri

Luigi Marchi

Licia Del Frate

Mose Gado

Daniele Carli

Fabio Pacchini

Cédric Leger

Cédric Louis Adrien Leger-Cartier

Various embodiments include an adjusting filter for a fluid injector valve comprising: an elongate filter sleeve having an inlet and an outlet; and a filter insert. The filter sleeve includes a filter accepting section at the inlet, a press-fit section, a centring section at the outlet, and a spring engaging surface surrounding the outlet. The press-fit section is arranged between the filter accepting section and the centring section. The filter insert is arranged in the filter accepting section. The filter accepting section has an outer diameter smaller than an outer diameter of the press-fit section. The centring section has an outer diameter smaller than the outer diameter of the press-fit section.

Filter for a fluid injection valve and a fluid injection valve

A valve assembly may include: a valve body with a longitudinal axis and a cavity; a valve needle; and a driving device for displacing the valve needle. In some embodiments, the valve needle comprises a disc element. The disc element and the driving device comprise mutually facing and radially extending coupling surfaces, the coupling surfaces having an overlapping area of at least 35% of the cross-sectional area of the cavity. The driving device takes the disc element with it for displacing the valve needle in the opening direction solely by means of hydraulic interaction between the coupling surfaces when the driving device is displaced in the opening direction. The coupling surface of the driving device engages in a form-fit connection with the coupling surface of the disc element for pushing the valve needle towards the closing position.

Valve assembly and fluid injection valve

The present disclosure relates to filters in general, and the teachings may be applied to a filter assembly for use in a fuel injector, the fuel injector, and internal combustion engines. A filter assembly may include: a filter element with a frame having an axial end and a tubular filter housing receiving the filter element. The filter housing may have a side wall with a taper supporting the axial end. The taper may have the shape of a conic section with an opening angle &#x3b3; of less than 180&#xb0;. The outer circumferential surface of the frame may include a first section in the section of the taper having the shape of a conic section with an opening angle &#x3b1; of less than 180&#xb0;.

Filter assembly and fuel injector

A valve assembly for an injection valve is disclosed. The valve assembly includes a valve body having a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle, an armature which is able to slide on the valve needle, and a disc element positioned to limit axial displaceability of the armature relative to the valve needle. The disc element includes a plurality of passages extending in axial direction through a disc-shaped part of the disc element. The passages provide a first flow resistance for a fluid passing in a direction away from the fluid outlet passage and a second flow resistance in a direction towards the fluid outlet passage, wherein the second flow resistance is larger than the first flow resistance.

Valve assembly for an injection valve and injection valve

The present disclosure relates to fluid injection and the teachings thereof may be embodied in an injector. Some embodiments include an injector comprising: a valve with a valve body and a valve needle; an armature mechanically coupled to the valve needle for moving the valve needle away from a closing position; and a damping element. The valve needle moves in the valve body and seals the valve. The armature displaces the valve needle away from the closing position. The damping element comprises: a hydraulic chamber and a piston arranged to modify a fluid volume of the hydraulic chamber. The piston reduces the fluid volume of the hydraulic chamber when the valve needle moves away from the closing position. A flow restricting orifice hydraulically connects the hydraulic chamber to the cavity.

Fluid injector

An injector for injecting fluid with a valve assembly including a valve body and a valve needle, the needle including an armature retainer and being operable to prevent and to enable injection of fluid, and with an electromagnetic actuator assembly, operable to exert a force for influencing a position of the valve needle, including a pole piece and an armature. The pole piece is positionally fixed with the valve body. The armature is operable to be axially displaced relative to the pole piece and to take along the armature retainer when being displaced towards the pole piece. A fluid channel is defined by the armature retainer constriction surface and the pole piece constriction surface. A hydraulic diameter of the fluid channel is at least twice at large when the valve needle is in a closing position compared to the hydraulic diameter at a maximum displacement away from the closing position.

Injector for injecting fluid

A filter for a fluid injection valve includes a filter sleeve and a fastening element. The fastening element includes a fitting portion for fastening the filter in the fluid injection valve and a connection portion mechanically interacting with a first part of the filter sleeve for connecting the filter sleeve and the fastening element. The filter sleeve includes a second part arranged inside the fastening element and disposed at a distance from the fitting portion of the fastening element. A fluid injection valve and a method for producing the filter are also disclosed.

Filter for a fluid injection valve, fluid injection valve and method for producing a filter for a fluid injection valve

A fuel injector includes a valve with a needle that is movable along a longitudinal axis between an open position and a closed position, for opening or closing the valve. The fuel injector also includes an actuator including an armature and a pole piece, the armature being axially movable and operable to interact mechanically with the needle, such that the needle is moved towards the open position by a movement of the armature in axial direction towards the pole piece. The fuel injector also includes a first spring for biasing the armature in axial direction away from the pole piece. The spring force of the first spring is configured to stop said movement of the armature when the needle is in the open position.

Fuel injector

A filter assembly for a fuel injector. In some embodiments, the filter assembly has a longitudinal axis and comprises a filter element, a filter housing, and a cap. The filter element may have a cylindrical section with a first axial end and a second axial end. The tubular filter housing may receive the filter element. The tubular filter housing may include a radial protrusion supporting the first axial end of the cylindrical section when the filter element is received therein. The cap may hold the filter element at the second axial end and encompass the filter housing along an outer circumference. The second axial end may rest directly against the cap.

Filter assembly for a fuel injector

A valve assembly for a fluid injection valve contains a hollow valve body which hydraulically connects a fluid inlet to an injection orifice and has a longitudinal axis. A valve needle is received in the valve body in an axially displaceable fashion for sealing the injection orifice in a closing position. An electromagnetic actuator assembly is provided for displacing the valve needle away from the closing position, the actuator assembly containing a movable armature and a pole piece which is positionally fixed relative to the valve body. A guide element is positionally fixed relative to the pole piece, has a first guide surface for axially guiding the armature and a second guide surface for axially guiding the valve needle.

Valve assembly with a guide element

A fuel injector includes a fuel valve with a valve seat and a movable valve needle, a calibration spring and an electromagnetic actuator with a solenoid and a movable armature. The calibration spring exerts a pressing force on the valve needle for pressing the valve needle in a closing direction towards the valve seat. When the solenoid is electrically energized, the electromagnetic actuator is operable to transfer a lifting force to the valve needle by engagement with the armature for lifting the valve needle from the valve seat to a fully open position against the pressing force of the calibration spring. The calibration spring and the electromagnetic actuator are configured such that the lifting force equals the pressing force in the fully open position.

An injection valve assembly includes a valve body having a cavity with a fluid inlet and a fluid outlet, a valve needle axially movable in the cavity to control fluid flow through the fluid outlet, an electro-magnetic actuator unit having an armature axially movable in the cavity and having a main body and a flange axially distanced from and fixedly coupled to the main body, and a stop element fixed to the valve needle and arranged in the cavity between the main body and the flange. An armature spring in the cavity forces the stop element into contact with an inner surface of the flange. An overlapping area of the stop element and the inner surface is bounded by an inner contour and an outer contour, and an area enclosed by the outer contour is at least three times as large as an area enclosed by the inner contour.

A valve assembly for an injection valve and a method for assembling a valve assembly are provided. The valve assembly includes a valve body with a central longitudinal axis and having a cavity with a fluid inlet portion and a fluid outlet portion, an end portion being arranged at an axial end facing away from the fluid outlet portion, and a seat being arranged at an axial end of the valve body facing the fluid outlet portion. A valve needle is axially movable in the cavity and prevents a fluid flow through the fluid outlet portion in a closing position and releases the fluid flow through the flu-id outlet portion in further positions. The valve needle has an axial end facing away from the fluid outlet portion and facing the end portion, and a seat part resting on the seat of the valve body in the closing position. A contact area between the seat part and the seat of the valve body has a first outer diameter. The valve assembly includes an electro-magnetic actuator unit being designed to actuate the valve needle. A bellow arrangement includes a bellow and an end portion, the bellow is fixedly coupled to the end portion in a coupling area. The coupling area has a second outer diameter. The first outer diameter is equal to the second outer diameter.

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Pisa, Italy

Ivano Izzo