Abstract: A fuel injection valve with a valve body has a bore that contains a piston-shaped valve member. The valve member is guided in the bore with a sealing section and a guiding section; between the sealing section and the guiding section, the valve member is encompassed by a first pressure chamber and between the guiding section and the combustion chamber end, is encompassed by a second pressure chamber. In the guiding section of the valve member, an annular collar is provided and has a side oriented toward the combustion chamber and a side oriented away from the combustion chamber. The annular collar has a throttle connection embodied on it, which connects the sides of the annular collar to each other and thus produces a throttled connection from the first pressure chamber to the second pressure 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: For each cylinder of the internal combustion engine, 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. By means of a control valve (70) actuated by means of a piezoelectric actuator (84), a connection of the pump work chamber (22) with a relief region (78). The fuel injection valve (12) has a first injection valve member (28), by which at least one first injection opening (32) is controlled and which is movable by the pressure generated in the pump work chamber (22) in an opening direction (29), counter to a closing force.

Abstract: A fuel injection valve for internal combustion engines, having a housing (1) in which an outer valve needle (20) and an inner valve needle (22) guided in it are disposed in a bore (16). The outer valve needle (20), by a longitudinal motion, controls an outer row (130) of injection openings, and the inner valve needle (22), likewise by means of a longitudinal motion, controls an inner row (230) of injection openings, to which rows (130; 230) of injection openings fuel is delivered at an injection pressure through a high-pressure conduit (10) embodied in the housing (1). A control pressure chamber (52) is embodied in the housing (1); it can be made to communicate with the high-pressure conduit (10), and by means of its pressure, a closing force is exerted at least indirectly on the inner valve needle (22).

Abstract: A fuel injection system having a housing (2), in which a pump piston (16) is disposed longitudinally movably, which piston positively displaces fuel from a pump work chamber (18) and delivers it to a pressure chamber (14). In a bore (42), an outer valve needle (44) is disposed longitudinally displaceably and cooperates with a valve seat, embodied on the end toward the combustion chamber of the bore (42), to control the opening of an outer row (70) of injection openings. The outer valve needle (44) experiences an opening force oriented away from the valve seat (48), as a result of the pressure in the pressure chamber (41), and a closing force, as a result of the force of an outer closing spring (52) disposed in an outer spring chamber (54). In the outer valve needle (44), an inner valve needle (46) is guided longitudinally displaceably, which likewise cooperates with the valve seat (48) to control an inner row (72) of injection openings.

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: A fuel injection valve with a valve body (1), which has a bore (3) that contains a piston-shaped valve member (5) in a longitudinally movable fashion, which valve member (5), with its end oriented toward the combustion chamber, controls the opening of at least one injection opening (17). The valve member (5) is guided in the bore (3) with a sealing section (105) oriented away from the combustion chamber and a guiding section (205) oriented toward the combustion chamber; between the sealing section (105) and the guiding section (205), the valve member (5) is encompassed by a first pressure chamber (9) that can be filled with fuel and between the guiding section (205) and the combustion chamber end, is encompassed by a second pressure chamber (19).

Abstract: In an injection nozzle for a fuel injection system, the opening stroke of the nozzle needle is to be limited selectively, so that different injection cross sections can be employed. To that end, the injection nozzle is provided with a nozzle body, a nozzle needle displaceable in the nozzle body, two groups of injection ports, which are uncovered as a function of an opening stroke of the nozzle needle, a piston that is connected to the nozzle needle, a stop chamber in which the piston is disposed and which is provided with an outlet, and a control valve that can open and close the outlet of the stop chamber, as a result of which the stroke of the piston in the stop chamber and thus the opening stroke of the nozzle needle can be selectively limited.

Abstract: A fuel injection valve with a valve body (1), whose end oriented toward the combustion chamber is provided with a pressure chamber (26), which is connected to a supply conduit (7). The pressure chamber (26) is defined by a valve member (20) whose valve sealing surface (18) rests against a stationary valve seat (17) with an internal tension and can be lifted up from this valve seat by the pressure in the pressure chamber (26). Downstream of the unblocked opening cross section, there is at least one injection opening (12) into the combustion chamber of the engine. The valve member (20) is embodied as essentially disk-shaped and the valve sealing surface (18) is embodied in its radially outer edge region and can be lifted up from the valve seat (17) in an elastic manner. In its center region, the valve member (20) is prestressed toward its contact with the valve seat (17) by a securing element (22) on the valve body (1) (FIG. 2).

Abstract: A fuel injection system for internal combustion engines, having a high-pressure accumulation chamber (7), which contains high-pressure fuel, having at least one fuel injection valve (15), which is connected to the high-pressure accumulation chamber (7). The fuel injection valve (15) can inject the highly pressurized fuel through injection openings (41, 42) into a combustion chamber of the engine. The fuel injection valve (15) has a control chamber (62), which is defined by a longitudinally mobile piston (60) and is operationally connected to the fuel injection valve (15) so that the injection cross section of the fuel injection valve (15) is controlled as a function of the hydraulic pressure in the control chamber (62). A low-pressure accumulation chamber (72) is provided, which can be connected to the control chamber (62), in which a predetermined fuel pressure is maintained in the low-pressure accumulation chamber (72) that is lower than the pressure in the high-pressure accumulation chamber (7) (FIG. 1).

Abstract: A fuel injection valve for internal combustion engines, having a valve member that is displaceable axially outward counter to a restoring force in a bore of a valve body. On an end toward the combustion chamber, the valve member has a closing head. The closing head protrudes from the bore and forms a valve closing member and on a side toward the valve body has a valve sealing face. The valve closing member cooperates with a valve seat face, disposed on a face end toward the combustion chamber of the valve body. The valve closing member at least one injection opening on the closing head. The injection opening originating at a pressure chamber and outlet opening being covered, in the closing position of the valve member, by the valve body and being uncovered upon an outward-oriented opening stroke. A two-stage hydraulic stroke stop, which limits the opening stroke of the valve member and is embodied as a hydraulic damping chamber with a relief line that can be opened.

Abstract: A fuel injection valve for internal combustion engines, having a valve member, which is guided axially displaceably in a bore of a valve body. An end toward the combustion chamber and that protrudes from the bore has a valve sealing face with which the valve member cooperates, to control an injection cross section, with a valve seat face on the valve body. A stroke stop face which is stationary relative to the valve body and with which the valve member comes into contact with a bearing face after traversing an outward-oriented maximum opening stroke distance, and the stroke stop face is disposed on an end face of an axially split stroke stop ring which is surrounded by a support ring. A valve spring urges the valve member in the closing direction and is supported stationary on the valve body via a spacer ring and an intermediate member. The support ring surrounding the stroke stop ring is supported stationary relative to the valve body and constantly contacts the spacer ring.

Abstract: A fuel injection valve for internal combustion engines, having a valve member that emerges outward from the valve body. At least two rows of injection ports one above the other are provided on the valve member, in the outward-oriented opening stroke of the valve member the injection parts are uncovered in secession. A two-stage hydraulic stroke stop, which limits the opening stroke travel of the valve member is embodied as a hydraulic damping chamber with openable relief. This relief is effected via at least two polished sections on the valve member which are openable in succession during the opening stroke motion of the valve member. At least one of the polished sections is connected to a low-pressure chamber, via a relief conduit containing a valve.

Abstract: A fuel injection valve for internal combustion engines that has a valve member which is guided axially displaceably in a guide bore of a valve body and which on an end toward the combustion chamber has a valve sealing face that cooperates with a valve seat face, formed on an end of the guide bore toward the combustion chamber, for controlling the communication between a high-pressure conduit in the valve body and at least one injection opening A diversion conduit in the valve member, by way of which diversion conduit the high-pressure conduit can be made to communicate with a relief chamber when the valve member has lifted from the valve seat face. Once the maximum opening stroke of the position of the valve member is reached, the diversion conduit is closed by a sealing face provided on the valve member, so that the entire supplied fuel quantity can attain injection.