Abstract: A fuel injection system with a fuel injection valve and a control valve, which control valve has a control valve member that can move longitudinally in a control valve bore. The control valve member is provided with a control valve sealing surface, which cooperates with a control valve seat and thereby controls the connection between a first pressure chamber and a second pressure chamber, where the first pressure chamber is connected to a high-pressure accumulation chamber. A bore is embodied in a valve body and contains a piston-shaped valve needle whose end oriented toward the combustion chamber controls the opening of at least one injection opening by virtue of the fact that it executes a longitudinal movement due to the impingement of the pressure in a pressure chamber; the pressure chamber is connected to the second pressure chamber by means of a supply conduit.

Abstract: A fuel injection valve for internal combustion engines, having a housing in which an outer valve needle and an inner valve needle guided in it are disposed in a bore. The outer valve needle controls an outer row of injection openings, and the inner valve needle controls an inner row of injection openings, to which rows of injection openings fuel is delivered at an injection pressure through a high-pressure conduit embodied in the housing. A control pressure chamber in the housing can be made to communicate with the high-pressure conduit, and by means of its pressure, a closing force is exerted at least indirectly on the inner valve needle. The high-pressure conduit communicates with a control chamber, by whose pressure a closing force is exerted at least indirectly on the outer valve needle, and the control chamber communicates with the control pressure chamber. A control valve is disposed in a housing, and by means of the control valve, the control chamber can be made to communicate with a leak fuel chamber.

Abstract: A fuel injection system having a high-pressure fuel pump and a fuel injection valve connected to it for each cylinder of the internal combustion engine. A pump piston of the high-pressure fuel pump delimits a pump working chamber that is connected to a pressure chamber of the fuel injection valve, which has an injection valve element that controls injection openings and can be moved in an opening direction counter to a closing force by the pressure prevailing in the pressure chamber. A first control valve controls a connection of the pump working chamber to a relief chamber and a second control valve controls a connection of a control pressure chamber which communicates with the pump working chamber, to a relief chamber. A throttle restriction is respectively provided in connections of the control pressure chamber to the pump working chamber and the relief chamber.

Abstract: A fuel injection apparatus having a high-pressure fuel pump and a fuel injection valve for each cylinder of an internal combustion engine, in which fuel pump has two pump pistons driven by the engine and delimiting a pump working chamber supplied with fuel from a tank. The second pump piston is guided to slide inside the first pump piston. The two pistons can be coupled so that they move as a unit during the delivery stroke or the second can be fixed in a passive position so that only the first executes a delivery stroke. The fuel injection valve a second injection valve element which is guided to slide inside a first injection valve element can be acted on by the pressure prevailing in a control pressure chamber which has a connection to the pump working chamber controlled by the second pump piston wherein the control pressure chamber is disconnected from the pump working chamber when the second pump piston is disposed in its passive position.

Abstract: A fuel injection system having a high-pressure fuel pump connected to a fuel injection valve for each cylinder of an internal combustion engine in which the high-pressure fuel pump has a piston defining a working chamber communicating with a pressure chamber of the fuel injection valve, which has an injection valve element that controls injection openings and can be moved in an opening direction counter to a closing force by the pressure prevailing in the pressure chamber. A first control valve controls a connection of the pump working chamber to a relief chamber and a second control valve controls a connection of a control pressure chamber, which communicates with the pump working chamber, to a relief chamber.

Abstract: A fuel injection apparatus having a high-pressure fuel pump and a fuel injection valve for each cylinder. An electrically actuated control valve controls a connection of the pump working chamber to a discharge region. A first injection valve element controls at least one first injection opening and a second injection valve element guided inside the first injection valve element controls at least one second injection opening. Pressure in a control chamber acts on the second injection valve element at least indirectly in the closing direction. By means of a connection controlled by a valve, the control pressure chamber is connected to a pressure region in which a respective pressure increase and decrease are delayed in relation to pressure in the pump working chamber when the control valve respectively closes and opens. The valve is acted on in the opening direction by the pressure prevailing in the pressure region and the closing direction by the pressure prevailing in the pump working chamber.

Abstract: A fuel injection system for an internal combustion engine with direct injection includes a fuel injection device which can inject the fuel directly into a combustion chamber of the engine has a valve element bordering on a work chamber, and the position of the valve element depends on the pressure in the work chamber. A pressure booster piston borders on a control chamber on one side and on a high-pressure chamber on the other. A fuel supply can subject the control chamber to various pressures. The pressure booster piston is integrated with the fuel injection device and that the high-pressure chamber is integrated with the work chamber.

Abstract: The fuel injection system having one high-pressure fuel pump and one fuel injection valve for each engine cylinder in which the pump piston defines a work chamber, which communicates with a pressure chamber of the fuel injection valve. A control valve controls connection of the pump work chamber with a relief chamber and having a second control valve controls a connection of a control pressure chamber, which communicates with the pump work chamber defined by a control piston with a relief chamber is controlled, and in which connection a throttle restriction is provided.

Abstract: A stroke-controlled valve as a fuel metering device of an injection system for internal combustion engines has a valve body with a valve seat and a valve needle which is actuatable in the valve body counter to the resistance of a valve needle restoring spring and which has a sealing edge that cooperates with the valve seat. A coupling body with a greater mass than the valve needle is disposed in the valve body, in the axial extension of the valve needle, and is movable coaxially to the valve needle and is actuatable by the valve needle during the opening stroke of the valve needle.

Abstract: A fuel injection valve for internal combustion engines, having a housing (1) in which a pistonlike outer valve needle (10) is disposed longitudinally displaceably in a bore (3) and cooperates with a valve seat (13), embodied on the end of the bore (3) toward the combustion chamber, to control at least one injection opening (7). A control chamber (24) is embodied in the housing (1), the pressure in the control chamber (24) being regulatable by a valve (33), and by the pressure in the control chamber (24) a closing force is exerted at least indirectly on the outer valve needle (10) in the direction of the valve seat (13). At least one pressure face (9; 101) is embodied on the outer valve needle (10) and is acted upon by the pressure in a pressure chamber (5), which is embodied between the outer valve needle (10) and the wall of the bore (3) and extends as far as the valve seat (13), so that an opening force on the outer valve needle (10) results that is oriented counter to the closing force.

Abstract: A fuel injection apparatus having a high-pressure fuel pump and a fuel injection valve for each cylinder of an internal combustion engine, in which fuel pump has two pump pistons driven by the engine and delimiting a pump working chamber supplied with fuel from a tank. The second pump piston is guided to slide inside the first pump piston. The two pistons can be coupled so that they move as a unit during the delivery stroke or the second can be fixed in a passive position so that only the first executes a delivery stroke. The fuel injection valve a second injection valve element which is guided to slide inside a first injection valve element can be acted on by the pressure prevailing in a control pressure chamber which has a connection to the pump working chamber controlled by the second pump piston wherein the control pressure chamber is disconnected from the pump working chamber when the second pump piston is disposed in its passive position.

Abstract: The fuel injection system has one high-pressure fuel pump and one fuel injection valve for each cylinder of the engine. The fuel injection valve has a first hollow injection valve member and a second valve member guided displaceably, inside the first valve member for controlling first and second opening(s), respectively into the associated engine cylinder. The second valve member is movable by the pressure prevailing in a pressure chamber in an opening direction counter to a closing force and is acted upon at least indirectly by the pressure prevailing in a fuel-filled control chamber, which pressure is controllable as a function of operating parameters of the engine such that the second injection valve member, by means of the pressure prevailing in the control chamber, can be blocked, independently of an opening motion of the first injection valve member in a position that closes the at least one second injection opening.

Abstract: The fuel injection system has one high-pressure fuel pump (10) with a pump work chamber (22) and one fuel injection valve (12), communicating with the pump work chamber, for each cylinder of the engine. The fuel injection valve (12) has a first injection valve member (28), by which at least a first injection opening (32) is controlled, and which is movable in an opening direction (29) counter to a closing force by the pressure generated in the pump work chamber (22).

Abstract: The fuel injection apparatus has a high-pressure fuel pump and a fuel injection valve for each cylinder of the engine. The pump has at least one piston driven by the engine and delimiting a pump working chamber supplied with fuel from a fuel tank. A control valve at least indirectly controls a connection of the pump working chamber to a relief chamber and a pressure source in order to fill the pump working chamber during the intake stroke. The pump has a first pump piston inside which a second pump piston is guided approximately coaxially, with the two pistons delimiting the working chamber. The first piston is driven in a stroke motion, and the two pistons can optionally be coupled to move together as a unit during the delivery stroke, or the second piston can be fixed in a passive position so that only the first pump piston executes the delivery stroke.

Abstract: A solenoid-valve-controlled fuel-injection pump for internal combustion engines, in particular diesel engines, has a solenoid valve, whose valve needle separates a high-pressure region from a low-pressure region, i.e. connects the high-pressure region and low-pressure region, in the pump housing, via a valve seat; the injection period being controlled by the opening of the solenoid valve. In addition, a low-pressure compensating piston situated in the low-pressure region is provided in order to compensate for pressure fluctuations in the low-pressure region. The exceptional feature is that the low-pressure compensating piston, which is positioned coaxially to the solenoid-valve needle, takes the form of a component part that is separate from the solenoid-valve needle. This ensures that the solenoid valve is opened unhindered and as rapidly as possible by the opening force exerted on the solenoid-valve needle by the electromagnet.

Abstract: A pressure relief valve with a closing element which can be moved axially in the opening direction in a bore in opposition to the force of a closing spring acting in the closing direction wherein when the pressure relief valve is closed, the closing element rests against a valve seat and closes an inlet and wherein a piston is integrated into the inlet is connected to the closing element by means of a connecting element and can be moved axially in the inlet.

Abstract: A fuel injection apparatus having a high-pressure fuel pump and a fuel injection valve for each cylinder. An electrically actuated control valve controls a connection of the pump working chamber to a discharge region. A first injection valve element controls at least one first injection opening and a second injection valve element guided inside the first injection valve element controls at least one second injection opening. Pressure in a control chamber acts on the second injection valve element at least indirectly in the closing direction. By means of a connection controlled by a valve, the control pressure chamber is connected to a pressure region in which a respective pressure increase and decrease are delayed in relation to pressure in the pump working chamber when the control valve respectively closes and opens. The valve that is acted on in the opening direction by the pressure prevailing in the pressure region and in the closing direction by the pressure prevailing in the pump working chamber.

Abstract: The fuel injection system has one high-pressure fuel pump and one fuel injection valve for each cylinder of the engine. The fuel injection valve has a first hollow injection valve member and a second valve member guided displaceably inside the first valve member for controlling first and second opening(s), respectively into the associated engine cylinder. The second valve member is movable by the pressure prevailing in a pressure chamber in an opening direction counter to a closing force, and is acted upon at least indirectly by the pressure prevailing in a fuel-filled control chamber, which pressure is controllable as a function of operating parameters of the engine such that the second injection valve member, by means of the pressure prevailing in the control chamber, can be blocked, independently of an opening motion of the first injection valve member, in a position that closes the at least one second injection opening.

Abstract: The fuel injection device has a fuel injection valve that has an injection valve member, which is guided so that it can slide in a valve body and controls at least one injection opening and which can be moved in the opening direction, counter to the force of a closing spring contained in a spring chamber by means of the pressure prevailing in a pressure chamber of the fuel injection valve. Highly pressurized fuel is supplied from a high pressure source to the pressure chamber of the fuel injection valve. An electrically controlled valve at least indirectly controls a connection of the pressure chamber to a relief chamber and connects the pressure chamber to the relief chamber in order to terminate the fuel injection. The pressure chamber of the fuel injection valve has a connection to the spring chamber, which connection contains a check valve that opens toward the pressure chamber.

Abstract: The invention proposes a fuel injection apparatus with a fuel injection valve, wherein the fuel injection valve has at least one injection opening and at least one valve element for closing the at least one injection opening, wherein the valve element is controlled by means of a servohydraulic valve (131), wherein the servohydraulic valve has a control piston (123) that is supported in moving fashion, wherein the control piston disconnects a control chamber (116) from a high-pressure chamber (120), wherein at least one first partial region (117) of the control chamber (116) can be emptied in every position of the control piston (123) via a line (110) provided with an outlet throttle (113), and wherein at least one second partial region (119) of the control chamber can be filled with fuel in every position of the control piston via an inlet throttle (115) so that depending on the filling of the control chamber (116), in a first position, the control piston (123) disconnects a first connection (125) of the high