Abstract: A fuel injection apparatus for internal combustion engines is proposed, which has a high-pressure fuel source from which fuel is supplied to an injection opening by means of a control valve unit. The control valve unit has a valve body, a valve member disposed in an axially mobile manner inside this valve body, and an actuator unit that actuates the valve member. A first high-pressure line connected to the high-pressure fuel source feeds into a first valve chamber of the control valve unit. In addition, a first valve seat is provided on an outer diameter of the valve body between the first valve chamber and a second valve chamber that communicates with the injection opening by means of a second high-pressure line. A second valve seat is formed on an inner diameter of the valve member and is engaged by a closing device.

Abstract: A high-pressure fuel system for internal combustion engines, having a housing that contains two high-pressure bodies. The high-pressure bodies rest with contact surfaces at least indirectly against each other and are pressed against each other by means of a tensioning device. A supply conduit is embodied in the high-pressure bodies, which carries highly pressurized fuel and passes through the contact surfaces of the two high-pressure bodies. A sealing film is disposed between the two high-pressure bodies, which encompasses the passage of the high-pressure conduit and thus assures a favorable seal.

Abstract: Disclosed is a fuel injection valve having at least two valve body parts, which each contact one another at a respective contact face and pressed against one another perpendicular to the contact face by a clamping device. An inflow conduit for fuel formed in both valve body parts passes through the contact faces, and a high fuel pressure prevails in it. At least one radially widened portion is embodied in the inflow conduit, near the contact face of at least one valve body part, so that this radially widened portion, as a result of the fuel pressure in the inflow conduit, undergoes an expansion in the axial direction. As a result, the region of the contact face surrounding the inflow conduit is pressed against the contact face of the contacting valve body part, so that the contact pressure of the contact faces increases, whereby the inflow conduit is thus better sealed off, and the force of the clamping device can be reduced.

Abstract: The invention relates to a common rail injector for the injection of fuel in a common rail injection system of an internal combustion engine, which has an injector housing with a fuel inlet that communicates with a central high-pressure reservoir outside the injector housing and communicates with a pressure chamber inside the injector housing, from which highly pressurized fuel is injected depending on the position of a control valve, which assures that a nozzle needle, which can move axially back and forth in a longitudinal bore in the injector housing counter to the initial stress of a nozzle spring, lifts up from a seat when the pressure in the pressure chamber is greater than the pressure in a control chamber, which can be connected via an inlet throttle to the fuel inlet and can be connected via an outlet throttle to a relief chamber, and in order to produce a common rail injector which is simple in design and inexpensive to produce, the connection between the fuel inlet and the pressure chamber is dispo

Abstract: The invention relates to a valve for controlling fluids, having an inflow line (7) and a leak fuel line (8), which each communicate with a pressure chamber (6). A piston element (3, 4) is also provided, which is adjustable by a control element (2) and opens and closes a first passage (10) between the inflow line (7) and the pressure chamber (6). The piston element (3, 4) has a slide element (3c), which is disposed directly at the seat of the piston element. The stroke length (h2) of the bc (3c) for opening the first passage is greater than or equal to the stroke length (h1) for closing a second passage (5) between the pressure chamber (6) and the leak fuel line (8).

Abstract: The invention relates to an injector for injecting fuel into the combustion chambers of an internal combustion engine. An injector body (3) is provided, which is movable in a housing (2) and whose vertical stroke motion relative to the housing (2) is effected by means of a control chamber (6) that can be pressure relieved via an actuator (10). Via the vertical stroke motion of the injector body (3), the closure or opening of a nozzle inlet line (21) to the injection nozzle (5) takes place. On the injector body, for stroke and/or pressure control of the injector (1), a first slide (23) and a second slide (25) are embodied, offset from one another.

Abstract: An injector for injecting fuel under high pressure into a combustion chamber of an internal combustion engine has an injector housing, a control valve body which is movably received in the injector housing, an actuating unit which activates the control valve body, a restoring element associated with an end side of the control valve body, the control valve body has parts which are held against one another, and a connecting element which holds the parts of the control valve body against one another.

Abstract: An injector for injecting fuel into the combustion chambers of a direct-injection internal combustion engine includes a control part which is received movably in the housing of the engine. The control part opens and closes the inlet to an injection nozzle at a seat face. In the control part, there is an inlet throttle, which acts upon the control chamber and is in communication with the inlet from the high-pressure collection chamber. In the housing of the injector, one region of the control part is coupled with a nozzle needle, via a further control chamber.

Abstract: A fuel injector (1), particularly an injection valve for fuel-injection systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator (16). By way of a valve needle (5), the actuator (16) actuates a valve-closure member (4), which interacts with a valve-seat surface (7) to form a sealing seat. The actuator (16) has a tubular design, and encircles a transmission piston (19) that acts on a hydraulic transmission device (27).

Abstract: The invention is directed to a high-pressure fuel storage device of a common rail fuel injection system supplying fuel to an internal combustion engine. The high-pressure fuel storage device includes a tubular base body (1), whose delimiting wall (19) encloses a lengthwise cavity (2). Several connections (8, 9, 10) for connecting high-pressure fuel lines are provided on tubular base body (1). The connections (8, 9, 10) for high-pressure fuel lines are situated decoupled from the tubular base body (1).

Abstract: A fuel injector for an internal combustion engine has an injector housing having a pressure releasable control chamber for a vertical stroke movement and an annular chamber, an injector body closeable by the annular chamber, an inlet connectable to a high pressure collecting chamber and connected to and emptying into the annular chamber, an injection nozzle having a nozzle inlet and a nozzle chamber, with the nozzle inlet opened or closed by a sealing surface, a hydraulic spring associated with the injector body and including a control element impinged with high pressure via a volume of the hydraulic spring and via the inlet.

Abstract: The present invention relates to an injector for injecting fuel into the combustion chamber of an internal combustion engine. The injector (1) is actuated by an actuator (29) and includes a central chamber (5, 44), through which fuel under high pressure enters into a control chamber (3) that activates a nozzle needle (4). The central chamber (5, 44) is connected via a connector (7) to a high pressure source. In the injector body (13) between the central chamber (5, 44) and an end face (38) on the connector (7) are configured supply-line bores (30, 31), whose diameters (33, 34) are many times smaller than the diameters (36, 45) of the central chamber (5, 44).

Abstract: The invention relates to an injection device with an injector, a control valve (26) for opening and closing the injector by means of a control chamber (32), and an actuating element (14) for actuating the control valve (26), wherein at least one additional first valve (22) and one additional second valve (24) are provided, the additional first valve (22) can introduce a primary pressure into a pressure chamber (34) of the injector and into the control chamber (32), the additional second valve (24) can connect the pressure chamber (34) of the injector and the control chamber (32) to a leakage system (36), and the control valve (26), the additional first valve (22), and the additional second valve (24) can be actuated by the same actuating element (14). The invention also relates to a method for injecting fluid, which uses the injection device according to the invention.

Abstract: An injector for injecting fuel in a combustion chamber of an internal combustion engine has a housing provided with a housing opening, a control valve body movable in the opening of the housing, a ring chamber which encloses the control valve body, an inlet connectable with a high pressure collecting chamber and opening into the ring chamber, a nozzle inlet arranged so that during the movement of the control valve body the nozzle inlet is connected with the inlet or separated from the latter, and 2/2-way control valves arranged inside the housing in series so that one of the 2/2-way control valves is force-equalized in an open condition.

Abstract: An injector for injection a fuel under high pressure into a combustion chamber of an internal combustion engine, the injector has an injector housing, a control chamber, a primary-side inlet to the control chamber, a control valve which controls the primary-side inlet to the control chamber, a pressure multiplier movable in the injector housing, the pressure multiplier being formed as a two-part piston arrangement.

Abstract: A piezoelectric element for actuating a mechanical component, is proposed in which, with a multilayer structure of piezoelectric layers, the inner electrodes disposed between them can be subjected to an electrical voltage. Since the piezoelectric layers with the inner electrodes function like capacitors, a shunting resistor for a requisite electrical discharge is formed, preferably in the head or foot part, by forming resistor tracks out of a resistor layer.

Abstract: A valve for triggering a fluid is proposed, having an actuator unit (7) for actuating an axially displaceable valve member (6), with which a valve closing member (15) is associated, which for opening and closing the valve (1) cooperates with a valve seat (23) and which separates a high-pressure region (3) from the valve (1). In the high-pressure region (3), the fluid to be triggered is at an operating pressure (p_R). This operating pressure (p_R) and an overpressure that may occur in some circumstances is recorded, because of the provision that the actuator unit (7) is embodied as a force-measuring sensor. In particular, this valve (1) serves as a pressure-limiting valve in a common rail system (Drawing).

Abstract: A fuel injection valve for internal combustion engines, having a valve body (1) in which in a bore (5), a valve member (7) is disposed to be axially movable counter to a closing force. On its end, the valve member (7) has a substantially conical valve member tip (30), which with a part of its jacket face that serves as a valve sealing face (9) comes to rest on a valve seat (11), embodied on the end toward the combustion chamber of the bore (5). At the transition from the valve member (7) to the valve member tip (30), an annular groove (23) is embodied, which undercuts the valve sealing face (11) in part and thereby forms an annular collar (28), which is resiliently yielding.

Abstract: A control valve (15) for injectors of injection systems for internal combustion engines is proposed, in which part of the displacement path of the final control element (45) serves the purpose of pressure elevation in the control chamber (11). The closing times of the nozzle needle (19) are thereby reduced.

Abstract: An injector for a common rail fuel injection system in which the opening of the nozzle needle is done under pressure control, while the nozzle needle is compulsorily closed when the control valve closes. This has advantages with regard to the onset of injection and the closing of the nozzle needle.