Abstract: A fuel injector (1) for fuel injection systems of internal combustion engines includes a valve needle (3) and a valve closing body (4), which is operationally linked to it and cooperates with a valve seat face (6) situated in a valve seat body (5) to form a sealing seat. Upstream from the sealing seat there is at least one swirl channel (32), which has a tangential component relative to the longitudinal axis (33) of the fuel injector (1). An axial channel (35), which is formed between the valve closing body (4) and the guide recess (34) of the valve seat body (5), has an axial component relative to the longitudinal axis (33) of the fuel injector (1), the axial channel (35) being formed between the guide recess (34) and at least one flattened area (37) on the valve needle (3).

Abstract: A fuel injector for fuel injection systems of internal combustion engines has a valve needle (3) and, mechanically linked thereto, a valve closing body (4), which cooperates with a valve seat surface (6) disposed in a valve seat body (5) to form a sealing seat, and has a plurality of recesses (34), which are introduced in the valve seat body (5) downstream from the sealing seat. Situated downstream on the valve seat body (5) is a flow-through screen (31) in which, for each recess (34), at least one discharge orifice (7) is introduced, whose cross-section is smaller than that of the particular recess (34) and which is positioned such that its inlet cross-section is situated fully within the outlet cross-section of the particular recess (34).

Abstract: An atomizer disk (23) has at least one inlet (40) and at least one outlet (42) and a complete passage for a fluid between the inlet (40) and the outlet (42). A flow rate sensor (50, 51, 50′, 51′, 150, 151) is integrated into the atomizer disk (23) upstream from a metering cross section of the fluid passage. In this way, the flow through the atomizer disk (23) is controllable in flow operation and is actively regulatable at any time.

Abstract: A fuel injector has a movable valve part (20), which for opening and closing of the valve cooperates with a stationary valve seat (27) which is formed on a valve seat element (26). A swirl disk (30) is situated downstream from the valve seat (27) and has a multilayer design. The fuel flowing through is imparted to a swirl component between at least one inlet area (65) and at least one outlet area (79). In a first swirl-generating plane (59) a swirl component is imparted to a first portion of the flow, while a second portion of the flow without swirl and independent of the first swirling portion of the flow is routed inside the swirl disk (30), and in a second swirl-generating plane (61) a swirl component is imparted only to the second portion of the flow.

Abstract: The present invention relates to a fuel injector for fuel injection systems of internal combustion engines, including, among others, an actuator (10, 11, 12) and a movable valve part (5, 7) cooperating with a fixed valve-seat (22) formed at a valve-seat member (16), to open and close the valve. Arranged downstream from the valve seat (22) is a disk-shaped swirl element (25) which is provided with at least one inlet region (27) and also at least one outlet opening (29), and which includes at least one swirl channel (28) upstream from the outlet opening (29). The inlet region (27) in the swirl element (25) receives a central inflow. All swirl channels (28) originate from here, so that the fuel, which flows through the swirl channels (28) exclusively from the inside towards the outside in the radial direction, is imparted with a swirl component.

Abstract: A fuel injector (1), in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, includes a valve-closure member (4) which forms a sealing seat together with a valve-seat surface (6) which is formed on a valve-seat member (5), and several injection orifices (7), each of which is connected with at least one spiral groove (37a) so that an outer edge (38) of the swirl grooves (37a) coincides in part with a circumferential edge (39) of the injection orifices (7) and the swirl grooves (37a) extend essentially perpendicular to a center line (41) of the injection orifice (7) associated with them.

Abstract: A fuel injector (1), in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, is equipped with a valve-closure member (4) which together with a valve-seat surface (6) that is formed on a valve-seat body (5) constitutes a sealing seat, with an ejection orifice (7) and with a swirl module (34). The swirl module (34) incorporates a plurality of tubular hollow bodies (43) which are disposed parallel to one another in a cluster (44) and which impart turbulence to the fuel flowing towards the ejection orifice (7) through the fuel ducts (45) formed in the hollow bodies (43).

Abstract: A fuel injector (1) for fuel injector systems of internal combustion engines has a valve-closure member (4) which is mechanically linked to a valve needle (3) and cooperates with a valve-seat surface (6) of a valve-seat member (5) to form a sealing seat. A turbulence-producing element is provided in the valve-seat member (5), situated downstream from the sealing seat, and its center line (38) preferably forms an angle different from zero with the center line (39) of the fuel injector (1), a threaded rod (36) being pressed into the valve-seat member (5) as the turbulence-producing element.

Abstract: A fuel injector (1), in particular for direct injection of fuel into a combustion chamber of an internal combustion engine, having an actuator (10) for actuating a valve needle (3), the valve needle (3) having on one injection end a valve-closure member (4) which forms a sealing seat together with a valve-seat surface (6) formed on a valve-seat member (5). Fuel channels (35) are provided in a valve needle guide (31) which is designed in one piece with or is connected to the valve-seat member (5) and they open into a swirl chamber (43). The number of fuel channels (35) is such that a turbulent flow produced in the swirl chamber (43) is homogeneous in a circumferential direction.

Abstract: The present invention relates to a fuel injector, in particular a fuel injector protruding directly into a combustion chamber of an internal combustion engine, having an energizable actuator (10, 11, 12), a valve-closure member (7) able to be moved by the actuator (10, 11, 12), a secure valve seat (22), with which the valve-closure member (7) cooperates to open and close the valve, a fuel outlet formed in a downstream spray-discharge region and by at least one outlet opening (23) situated downstream from valve seat (22), and a dead volume (25) formed downstream from valve seat (22) and upstream from the spray-discharge region having at least one outlet opening (23). Surface 33 of valve-closure member (7) bordering the dead volume has a surface structure having at least several pores with a surface roughness of at least 25 &mgr;m for gas accumulation.

Abstract: The present invention relates to a fuel injector, in particular a fuel injector protruding directly into a combustion chamber of an internal combustion engine, having an energizable actuator (10, 11, 12), a valve-closure member (7) able to be moved by the actuator (10, 11, 12), a secure valve seat (22), with which the valve-closure member (7) cooperates to open and close the valve, a fuel outlet formed in a downstream spray-discharge region and by at least one outlet opening (23) situated downstream from valve seat (22), and a dead volume (25) formed downstream from valve seat (22) and upstream from the spray-discharge region having at least one outlet opening (23). A device for accumulating combustion chamber gas is provided in the valve-closure member (7) in the form of a blind hole (33) having direct access to the dead volume (25).

Abstract: The present invention relates to a swirl disk that distinguishes itself in that it has at least one inlet region and at least one outlet opening, the at least one outlet opening being introduced in a bottom base layer. The swirl disk also has at least two swirl channels, which empty into a swirl chamber, the swirl chamber being provided in a swirl-generating layer. The swirl channels being situated and positioned such that when a fluid flows through, at least two swirl flows are generated next to one another in opposite directions, each one having its own jet branch. The swirl disk is particularly suitable for use on a fuel injector, in particular a high-pressure injector for directly injecting fuel into a combustion chamber of a mixture-compressing, spark-ignition internal combustion engine.

Abstract: Fuel injection valve is described which possesses a multilayer swirl valve downstream from a valve seat shaped onto a valve seat element, at least these two components being installed from the inflow direction into a passthrough opening of a valve seat support. The valve seat support has a lower base region that provides for a reduction in the cross section of the passthrough opening downstream from the valve seat. The fuel injection valve is suitable in particular for direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.

Abstract: Component having several plates or working layers which are built upon one another by microdeposition. At least one code mark which is produced during electroplating and can be evaluated from the outside through optical means, is provided in at least one of the working layers forming an outer edge of the component. In the form of a perforated disk, the component is suitable for use in injection valves, in ink-jet printers, for spraying or injecting fluids, or for atomizing medicines.

Abstract: A fuel injection valve is described which has a swirl disk downstream from a valve seat, the swirl disk being made of at least one metallic material, having at least two swirl channels opening into a swirl chamber, and in which all layers are adheringly deposited directly one on top of the other by electroplating (multilayer electroplating). The swirl disk is installed in the valve so that the surface normal to its surface forms an oblique angle other than 0° with the longitudinal valve axis, so that a jet angle &ggr; with respect to the longitudinal valve axis is formed due to the orientation of the swirl disk. The fuel injection valve is particularly well suited for direct injection of fuel into the combustion chamber of a compressed mixture externally ignited internal combustion engine.

Abstract: A perforated disk has a complete passage for a fluid and composed of an inlet opening, outlet openings, and at least one cavity positioned between them. The at least three functional plates of the perforated disk, each of which has a characteristic opening structure, are applied onto one another by electrodeposition (multilayer electroplating) so that the perforated disk is composed of a single piece. Gas supply openings through which a gas can be supplied in the direction of the fluid to be sprayed are located in the lower functional plate, thus providing very fine atomization of the fluid. The outlet openings are part of the gas supply openings. The perforated disk is especially suitable for use in injection valves for mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: A fuel injection valve having a swirl disk, located downstream from a valve seat (15), that is made of at least one metallic material and has at least two swirl channels emptying into a swirl chamber, with all layers being built up by electrodeposition (multilayer electroplating) so that they adhere firmly to each other. The swirl disk has an upper layer that includes multiple material areas separated from each other by opening structures. The material areas of the swirl disk rest against a valve seat body containing the valve seat. The fuel injection valve is especially suitable for injecting fuel directly into the combustion chamber of a mixture-compressing internal combustion engine with externally supplied ignition.

Abstract: A fuel inject includes an orifice plate which is arranged on a valve-seat member, particularly at its downstream end face, the valve-seat member having a fixed valve seat, the orifice geometry of the orifice plate being bounded by the valve-seat member, so that the flow ratios in the orifice plate are influenced by the valve-seat member. The valve-seat member covers an upper inlet region of the orifice plate, at least to the extent that downstream outlet orifices of the orifice plate are overlapped. The fuel injector is particularly suited for use in fuel systems of mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: A method is provided for manufacturing an orifice disk. Metal foils are made available, opening geometries and auxiliary openings are introduced in the metal foils. The individual metal foils are superimposed in centered fashion. The metal foils are joined using a joining method, thus creating an orifice disk band having a plurality of rounds. Finally an isolation of the rounds or orifice disks is performed. The orifice disks manufactured in this manner are particularly suitable for use in fuel injection valves that are utilized in mixture-compressing, spark-ignited internal combustion engines.

Abstract: A fuel injection valve is is described. The fuel injection valve includes a swirl disk downstream from a valve seat, the swirl disk being made of at least one metallic material, having at least two swirl channels opening into a swirl chamber, and in which all layers are adheringly deposited directly one on top of the other by electroplating (multilayer electroplating). A perforated spray disk having an outlet opening shaped so that it directly influences the flow of the fuel exiting through the outlet opening of the swirl disk is arranged directly downstream from the swirl disk. The fuel injection valve is particularly well suited for direct injection of fuel into the combustion chamber of a compressed mixture externally ignited internal combustion engine.