Abstract: A device for holding down a valve for metering fuel in the cylinder head of an internal combustion engine is provided. The valve is inserted for fuel supply, using a connection piece, into a sealing region which presses against the connection piece at an outlet opening of a manifold fixed to the cylinder head. Between a first support shoulder on the side of the valve and a second support shoulder on the side of the manifold, the device has a clamped spring element for transferring a holding-down force onto the valve. In order to achieve an inward deflection of the spring element required for the transfer of the holding-down force, the spring element is prestressed to a prestressing force that is reduced with respect to the holding-down force, and the prestressed spring element is fixed on the valve.

Abstract: A valve for metering fluid includes: a piezoelectric actuator for metering control; two electrical connection elements for applying an electrical control voltage; and a discharge resistor integrated into the actuator, which resistor bridges the two connection elements.

Abstract: An injector, in particular a blow-in injector for gaseous fuel, including a first sealing element and a second sealing element, and in the closed state of the injector a first sealing region is configured between the first and second sealing element, at least one of the sealing elements having an elastic deformation region, the elastic deformation region being set apart from the sealing region between the first and second sealing element.

Abstract: An injector for a fluid, particularly for fuel, is provided having a valve housing, a fluid intake, a valve chamber having a spray-discharge orifice, a piezoelectric or magnetostrictive actuator situated in the valve housing and a fluid-guiding pipe connecting a fluid intake and a valve chamber, which is situated in the valve housing running along the actuator. In order to create structural space in the valve housing for guiding through the fluid-guiding pipe which has a sufficiently large diameter for reducing pressure drops in the intake region, a hollow cylinder surrounding the actuator and developed as a prestressed spring is provided with a cylinder wall opening that extends axially through the entire length, and the positioning of the fluid-guiding pipe in the valve housing is undertaken so that it extends radially into the cylinder wall opening.

Abstract: An assembly includes: a first component; a second component enclosed by the first component; a diaphragm that covers a radial gap between the first and second components and is fixed in each case in a sealed manner; and a volume of a medium that is enclosed by the first and second components and the diaphragm. For the purpose of achieving a simple filling process of the assembly with the medium at a reliable sealing of the enclosed volume, even in the case of high, swelling pressures acting upon the assembly, in one of the components a filling valve is situated that opens towards the volume, which filling valve is situated as a check valve having spring resetting in a filling channel running in the component.

Abstract: A hydraulic coupling is specified, particularly for fuel injectors, which has a housing pot having a pot bottom and a lateral pot surface, a piston guided axially displaceably in the housing pot, a fluid-filled coupling gap that is provided between the piston and the pot bottom, diaphragm situated on the outer side of the housing pot facing away from the piston, a compensation chamber that is bordered by the diaphragm and flow-connected to the coupling gap, and a spring element acting upon the diaphragm with an axially directed spring force. In order to achieve a low overall stiffness of the hydraulic coupling at the required specified coupling force, the spring element is developed as a spring bracket fixed to the housing pot, which lies against the diaphragm with axial prestressing in the region of the pot bottom.

Abstract: A valve for metering fluid having a valve assembly which meters the fluid, and a hydraulic coupler assigned to the valve assembly. The coupler has a housing cup having a cup bottom, cup wall and cup opening; a piston is guided inside the housing cup in axially displaceable manner and delimits a fluid-filled coupler gap in the direction of the cup bottom and delimits an annular gap in the direction of the cup wall; and a cap-shaped diaphragm having a cap bottom and cap shell, which covers the annular gap at the cup opening by the cap bottom and overlaps the cup wall of the housing cup by the cap shell, and is fixed in place at the piston and cup wall in fluid-tight manner.

Abstract: A valve for metering a fluid (liquid or gaseous medium), in particular, a fuel injector for internal combustion engines, having a valve housing, an actuator accommodated in the valve housing and acting on a valve member, an electrical connector accessible on the outside of the valve housing, and an electrical supply lead that produces an electrical connection from the connector to the actuator and has two lead strands, each having a flexible strand section.

Abstract: A valve for metering fluid under pressure includes: a valve housing having an inlet opening and a metering opening for the fluid; an outward-opening valve needle pressure equalized via an elastic hollow body which is subject to the fluid pressure; and an electromagnet which lifts the valve needle up from the metering opening against the force of a valve closing spring. The valve housing is assembled from a valve tube and one valve body on the metering end and another on the inlet end, each being connected in a fluid-tight manner to the valve tube at the tube ends. The magnet pot including the enclosed solenoid coil is secured on the valve tube on the outside by the electromagnet, and the magnetic core is secured on the valve tube on the inside in such a way that it surrounds a needle section of the valve needle.

Abstract: A valve for metering fluid under pressure includes: a valve housing which has an inlet opening and a metering opening as well as a valve seat enclosing the metering opening having an outwardly pointing seat surface; a valve needle carrying a closing head; a valve-closing spring acting on the valve needle and applying the closing head to the valve seat; and an electrical actuator, which applies a compressive force to the valve needle, lifting the closing head outwardly away from the valve seat. To prevent transverse forces on the valve needle, which can cause a deflection of the valve needle, a gimbal-mounted spring disk, which is pushed onto the valve needle, is used as the valve-closing spring.

Abstract: A valve for metering a flowing, e.g. gaseous or liquid, medium, in particular a fuel injection valve for internal combustion engines, is described, which valve comprises a valve housing having an inflow for the medium, a valve body having a metering opening for the medium, a join present between the valve housing and valve body, and a seal sealing the join. In order to ensure a seal that is reliable and not susceptible to cracking, in which context the material of the valve housing and valve body can be selected without restriction, the seal has a clamping ring, covering the join, that sits with a press fit on end portions, facing toward one another at the join, of the valve housing and valve body.

Abstract: An injector for a fluid is provided, in particular for fuel, which has a valve housing, an intake nipple for the fluid disposed at one housing end, a nozzle body disposed at the other housing end, which has a valve seat surrounding a spray-discharge orifice, and a valve chamber disposed upstream therefrom, and a fluid-carrying pipe which extends in the valve housing and connects the valve chamber to the intake nipple. To achieve a connection of the fluid-carrying pipe to the valve chamber that is impervious to high operating pressures and is suitable in terms of production and convenient in terms of assembly, an axial blind hole which has an internal thread and is disposed at a radial offset to the housing axis of the valve housing, is formed in the nozzle body, and a fluid connection us established from the blind hole to the valve chamber.

Abstract: A valve for metering fluid includes: a piezoelectric actuator for metering control; two electrical connection elements for applying an electrical control voltage; and a discharge resistor integrated into the actuator, which resistor bridges the two connection elements.

Abstract: A device for holding down a valve for metering fuel in the cylinder head of an internal combustion engine is provided. The valve is inserted for fuel supply, using a connection piece, into a sealing region which presses against the connection piece at an outlet opening of a manifold fixed to the cylinder head. Between a first support shoulder on the side of the valve and a second support shoulder on the side of the manifold, the device has a clamped spring element for transferring a holding-down force onto the valve. In order to achieve an inward deflection of the spring element required for the transfer of the holding-down force, the spring element is prestressed to a prestressing force that is reduced with respect to the holding-down force, and the prestressed spring element is fixed on the valve.

Abstract: An injector for a fluid, particularly for fuel, is provided having a valve housing, a fluid intake, a valve chamber having a spray-discharge orifice, a piezoelectric or magnetostrictive actuator situated in the valve housing and a fluid-guiding pipe connecting a fluid intake and a valve chamber, which is situated in the valve housing running along the actuator. In order to create structural space in the valve housing for guiding through the fluid-guiding pipe which has a sufficiently large diameter for reducing pressure drops in the intake region, a hollow cylinder surrounding the actuator and developed as a prestressed spring is provided with a cylinder wall opening that extends axially through the entire length, and the positioning of the fluid-guiding pipe in the valve housing is undertaken so that it extends radially into the cylinder wall opening.

Abstract: A fuel injection device for injecting fuel includes an electrical-plug-and-socket connection configured as a modular component. The electrical-plug-and-socket connection includes an electric line region and exactly one one-piece plug contact molding. The plug contact molding surrounds the electric line region, and the plug contact molding forms a part of the outer geometry of the fuel injection device.

Abstract: A valve for controlling fluids having a piezoelectric actuator unit which has an actuator base and an actuator head that acts on a coupling module which is connected to a valve closing member that cooperates with a valve seat; the actuator base is braced via a spherical face on a conical seat of a valve housing and has an O-ring seal on its circumference. The spherical face of the actuator base is located on the side of the O-ring seal facing away from the actuator head.

Abstract: An injector for a fluid is provided, in particular for fuel, which has a valve housing, an intake nipple for the fluid disposed at one housing end, a nozzle body disposed at the other housing end, which has a valve seat surrounding a spray-discharge orifice, and a valve chamber disposed upstream therefrom, and a fluid-carrying pipe which extends in the valve housing and connects the valve chamber to the intake nipple. To achieve a connection of the fluid-carrying pipe to the valve chamber that is impervious to high operating pressures and is suitable in terms of production and convenient in terms of assembly, an axial blind hole which has an internal thread and is disposed at a radial offset to the housing axis of the valve housing, is formed in the nozzle body, and a fluid connection us established from the blind hole to the valve chamber.

Abstract: A fuel injection device for injecting fuel includes an electrical-plug-and-socket connection configured as a modular component. The electrical-plug-and-socket connection includes an electric line region and exactly one one-piece plug contact molding. The plug contact molding surrounds the electric line region, and the plug contact molding forms a part of the outer geometry of the fuel injection device.

Abstract: A tubular spring is provided for preloading a piezoelectric or magnetostrictive actuator for the actuation of fuel injection valves for fuel injection systems of internal combustion engines. The tubular spring has at least two assembly engagements for uniform preloading of the tubular spring.