Abstract: A fuel injector is described, in particular an injector for fuel injection systems in internal combustion engines, that includes a valve needle having a valve-closure member which cooperates with a valve-seat surface arranged in valve-seat member to form a sealing seat and which has several injection orifices which are arranged downstream from the sealing seat, and are sealed by sealing seat against a fuel supply. A disk element is arranged downstream from the sealing seat, the disk element having at least one valve section, which changes its shape when the temperature changes. Valve section is connected to a heating element and optionally covers an injection orifice.

Abstract: A cylinder head (10) for a combustion cylinder of an internal combustion engine is described, which has at least one inlet opening and at least one outlet opening, as well as gas exchange valves (11) which are operable by electrohydraulic valve actuators (15) which as inlet valves (111) control the at least one inlet opening and as outlet valves (112) control the at least one outlet opening. For the purpose of premanufacturing a compact, complete module which, as a separate component, may be tested for reliability and may be installed into the engine block of the internal combustion engine without additional preassembly effort, there is present at cylinder head (10) at least one high pressure rail (37) for supplying fluid under high pressure, and at least one recycling rail for recycling fluid, which have coupling openings (39, 40) for the hydraulic coupling of the valve actuators (15), and also means for fastening the valve actuators (15) are provided (FIG. 1).

Abstract: A fuel injector, e.g., an injector for fuel injection devices in internal combustion engines, has a valve needle with a valve-closure member which cooperates with a valve seat surface in a valve seat body to form a sealing seat, in which the valve seat body has a plurality of injection orifices that are isolated from the fuel supply by sealing seat. The valve-closure member has a pressure element in a recess facing the valve seat body, which is pre-tensioned against the valve seat body by a spring which is supported on the valve-closure member and presses a disc spring against the valve seat body, in such manner that the disc spring covers at least one of the injection orifices, and the spring element uncovers this injection orifice when the tension exerted by the pressure element is removed.

Abstract: A fuel injector for fuel injection systems in internal combustion engines, including an actuator, a valve needle operable by the actuator for operating a valve-closure member, which, together with a valve-seat surface forms a sealing seat and a swirl device including at least one swirl channel, through which fuel flows with a tangential component relative to a longitudinal axis of the fuel injector. The axial position of a plunger element determines a cross-section of at least one bypass channel that bypasses the at least one swirl channel without a tangential component.

Abstract: A fuel injector for fuel injection system of an internal combustion engine includes a solenoid coil, an armature acted upon in a closing direction by a return spring, and a valve-closure member frictionally connected to the armature. The valve-closure member, together with a valve-seat surface, forms a sealing seat, the armature striking with an armature stop face against a magnetic-pole surface of a magnet body. The armature stop face includes a first annular, inner edge zone that adjoins an inner edge and is inclined inwardly with respect to a plane perpendicular to longitudinal axis of the armature, and has a second annular, outside edge zone that adjoins an outer edge and is inclined outwardly with respect to a plane perpendicular to the longitudinal axis of the armature.

Abstract: A fuel injector (1) for the direct injection of fuel into the combustion chamber of an internal combustion engine encompasses a piezoelectric or magnetostrictive actuator (3), a valve needle (10) actuable by the actuator (3), the valve needle (10) cooperating with a valve-closure member (17) to form a sealing seat (25) together with a valve-seat member (18), and a restoring spring (20) by which the valve needle (10) is acted on in a closing direction. The valve needle (10) is pressure-equalized in that the force exerted by the fuel pressure on the valve needle (10) in the opening direction is approximately equal to the force exerted by the fuel pressure on the valve needle (10) in the closing direction.

Abstract: A fuel injector (1) for the direct injection of fuel into the combustion chamber of an internal combustion engine includes a piezoelectric or magnetostrictive actuator (6) and an hydraulic coupler (2), the coupler (2) having a master piston (3) and a slave piston (8), which are connected to a pressure chamber (14), and the pressure chamber (14) being filled with an hydraulic fluid. The pressure chamber (14) is sealed from an actuator chamber (21) by a first seal (12) and from a valve interior chamber (17) by a second seal (13).

Abstract: A fuel injector (1), in particular for fuel injection systems in internal combustion engines, including an actuator (27), a valve needle (3) operable by the actuator (27) for operating a valve-closure member (4), which, together with a valve-seat surface (6) forms a sealing seat and a swirl device (34) having at least one swirl channel (35), through which fuel flows with a tangential component relative to a longitudinal axis (38) of the fuel injector (1). The axial position of a plunger element (36) determines a cross-section of at least one bypass channel (37) that bypasses the at least one swirl channel (35) without a tangential component.

Abstract: A fuel injector (1) for the direct injection of fuel into the combustion chamber of an internal combustion engine includes a valve needle (4) situated in a nozzle body (3), the valve needle (4) being actuable by an actuator (7) and acted upon by a restoring spring (9) in such a manner that a valve-closure member (5) which is in operative connection to the valve needle (4) and faces the combustion chamber is kept in sealing contact to a valve-seat surface (6) in the non-actuated state of the actuator (7). A first jet-opening angle &agr;1 is assigned to a first lift state of the valve needle (4) and a second jet-opening angle &agr;2 to a second lift state of the valve needle (4).

Abstract: A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, including a piezoelectric or magnetostrictive actuator, actuates a valve-closure member formed on a valve needle via a hydraulic coupler, the valve-closure member cooperating with a valve-seat surface to form a valve-sealing seat. The coupler includes a master piston and a slave piston which are connected to a pressure chamber, and at least one coupler-spring element which in each instance produces a prestressing force on the master piston, counter to a working direction, and on the slave piston, in a working direction. The pressure chamber of the coupler is connected to a fuel inflow in the flow-through direction to the pressure chamber via an inflow bore and a check valve.

Abstract: The current invention relates to a valve (1) for controlling fluids, which has a piezoelectric actuator for actuating a valve element (3, 4), wherein the valve element (3, 4) moves out of a valve body (16) when actuated. A stroke control is embodied between the piezoelectric actuator and the valve element (3 ,4). The valve also has a stop device (8) for limiting the stroke h1 of the valve element (3, 4).

Abstract: A fuel injector (1), in particular for the direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignited internal combustion engine includes an actuator (10), a valve needle (3) actuatable by the actuator (10) for operating a valve-closure member (4), which, together with a valve-seat surface (6) forms a sealing seat and a swirl disk (35) having at least one swirl channel (36). An elastic fuel metering ring (37) is situated in a recess (43) of a nozzle body (2) of the fuel injector (1) in such a manner that a metering cross-section of the at least one swirl channel (36) is variable as a function of a fuel pressure prevailing in the fuel injector (1) during operation.

Abstract: A fuel injector, in particular an injector for fuel injection systems in internal combustion engines, includes a valve needle (6) having a valve-closure member (7) which cooperates with a valve-seat surface (8) situated in valve-seat member (5) to form a sealing seat (9) and which has several injection orifices (4, 12) which are situated downstream from the sealing seat (9), and are sealed by sealing seat (9) against a fuel supply. A disk element (10) is arranged downstream from the sealing seat (9), the disk element (10) having at least one valve section (11), which changes its shape when the temperature changes. Valve section (11) is connected to a heating element (13) and is possibly covering an injection orifice (12).

Abstract: A fuel injection valve (1) for fuel injection systems of internal combustion engines comprises a valve needle (3) and a valve closure element (4), in working engagement therewith, that coacts with a valve seating surface (6) arranged in a valve seat element (5) to form a sealing seat; and multiple spray discharge openings (7) downstream from the sealing seat. Spray discharge of the fuel from at least one spray discharge opening (7) can be switched off at least temporarily, and the spray discharge of fuel from a particular spray discharge opening (7) is switched off by local vaporization of fuel, by way of a respective local heating element (44) that is arranged upstream of the respective spray discharge opening (7) on a surface (43) delimiting the flow path.

Abstract: A fuel injection valve, in particular for direct injection of fuel into a combustion chamber of an internal combustion engine, includes an actuator that is in working engagement with a valve needle, the valve needle including at its spray-discharge end a valve closure element that coacts with a valve seating surface configured on a valve seat element to form a sealing seat. Also provided is a swirl disk in which swirl channels are configured. The swirl disk includes extensions that coact with a cam disk in such a manner that a tangential component of the swirl generated by the swirl disk is modifiable.

Abstract: In a fuel-injection system, a fuel injector (1) has a valve-closure member (4), which cooperates with a valve seat surface (6) on a valve seat element (5) to form a sealing seat. At least one spray-discharge opening (7. 49) is situated downstream of the sealing seat and it is sealed from a fuel inlet (16) by the sealing seat. The spray-discharge opening (7, 49) has a spray-shaping section (34) which is made of a thin-walled wall section of the spray-discharge opening (7, 49) lying opposite to a pressure chamber (44), and the pressure chamber (44) may have pressure applied to it by a pressure fluid.

Abstract: An apparatus for direct gasoline injection in a piston engine, which has a hydraulic valve control system with hydraulically actuated gas exchange valves. The direct gasoline injection is associated with the hydraulic valve control system via a pressure booster for two different pressure media, which is acted upon by hydraulic oil from a high-pressure hydraulic oil reservoir of the hydraulic valve control system and which subjects a high-pressure fuel reservoir to high pressure; injection valves for direct gasoline injection in the piston engine are connected to the high-pressure fuel reservoir.

Abstract: A fuel injector, in particular an injector for fuel injection devices in internal combustion engines has a valve needle (5) with a valve-closure member (6) which cooperates with a valve seat surface (8) in a valve seat body (22) to form a sealing seat (9), in which the valve seat body (22) has a plurality of injection orifices (4, 15, 18) that are isolated from the fuel supply by sealing seat (9). The valve-closure member (6) has a pressure element (11) in a recess (10) facing the valve seat body (22), which is pre-tensioned against the valve seat body (22) by a spring (12) which is supported on the valve-closure member (6) and presses a disc spring (13) against the valve seat body (22), in such manner that the disc spring (13) covers at least one of the injection orifices (15), and the spring element (13) uncovers this injection orifice (15) when the tension exerted by the pressure element (11) is removed.

Abstract: A fuel injector (1), in particular a fuel injector (1) for fuel injection systems, includes a first solenoid (2) cooperating with an armature (3), a second solenoid (4) cooperating with the armature (3), and a valve needle (13) friction-locked to the armature (3) for actuating a valve closing body, a force being exertable on the armature (3) in a closing direction using the first solenoid (2) and in an opening direction using the second solenoid (4).

Abstract: A fuel injector (1) for fuel injection systems of internal combustion engines is composed of a solenoid coil (8), an armature (21) acted upon in a closing direction by a return spring, and a valve-closure member frictionally connected to the armature (21). The valve-closure member, together with a valve-seat surface, forms a sealing seat, the armature (21) striking with an armature stop face (42) against a magnetic-pole surface (44) of a magnet body (42). The armature stop face (42) has a first annular, inner edge zone (31a) that adjoins an inner edge (47) and is inclined inwardly with respect to a plane perpendicular to longitudinal axis (30) of the armature (21), and has a second annular, outside edge zone (31b) that adjoins an outer edge (46) and is inclined outwardly with respect to a plane perpendicular to the longitudinal axis (30) of the armature (21).