Abstract: The fuel injection valve has a hydraulic control device for controlling the axial movement of the injection valve member. The stem of the intermediate valve member of mushroom-shaped configuration of the intermediate valve is guided in the guide recess of the intermediate part. In the open position, the intermediate valve member opens up a second connection between a high-pressure fuel inlet and a valve chamber and, in the closed position, the intermediate valve member shuts off the second connection between the high-pressure fuel inlet and the valve chamber. In the closed position of the intermediate valve member, the head of the intermediate valve member lies with a side facing toward the intermediate part against the intermediate valve seat via a first sealing surface, which runs around the stem or the guide recess at a first radial spacing so as to form a first annular sealing surface which is continuous in the circumferential direction.

Abstract: A fuel injection valve (10) comprises an intermediate valve with a mushroom-shaped intermediate valve member (78). The shaft (76) of the intermediate valve member (78) is guided with a sliding fit in the guiding passage (74) of an intermediate component (66). An annular space (120) is defined between the shaft (76) and the head (80) of the intermediate valve member (78) and the intermediate component (66), and a high-pressure inlet (86) opens into the annular space, which is formed by an inner annular space (108) and by a split ring space (118). The split ring space (118) is defined between the head (80) and the intermediate component (66), and is also radially outwardly defined by a sealing bead (112). The adhesion force between the intermediate valve member (78) and the intermediate component (66), which acts against the opening motion of the injection valve member (56), is minimized.

Abstract: The housing (18) of the fuel injection valve (10) of the device for intermittently injecting fuel into the combustion chamber of an internal combustion engine comprises a high-pressure inlet (34) with a conical sealing face (44). The high-pressure chamber (36) is disposed in the housing (18) from the high-pressure inlet (34). A cartridge-like, independent component (56) is inserted into the high-pressure chamber (36). Said component comprises the valve carrier (46), the non-return valve (48), the holding element (50), and preferably the filter body (52?). The valve carrier (46) is provided with a conical outer sealing face (69), by which the valve carrier rests against the conical sealing face (44). A fixing element (74) presses the supply line (16) against the valve carrier (46).

Abstract: The fuel injection valve (1) for the intermittent injection of fuel into the combustion chamber of an internal combustion engine has a valve housing (12) that defines a longitudinal axis (14) and is provided with a high-pressure chamber (16). The connecting part (20) of the valve housing (12) has two identically formed high-pressure connections (22, 24) for high-pressure fuel lines. The two identically formed high-pressure connections (22, 24) are arranged in a common connecting face (30?) in such a way that said high-pressure connections are oriented in the same direction and the connection axes (22?, 24?) thereof run parallel to each other. In the interior of the valve housing (12), the high-pressure connections (22, 24) are connected to each other and to the high-pressure chamber (16).

Abstract: The housing (18) of the fuel injection valve (10) of the device for intermittently injecting fuel into the combustion chamber of an internal combustion engine comprises a high-pressure inlet (34) with a conical sealing face (44). The high-pressure chamber (36) is disposed in the housing (18) from the high-pressure inlet (34). A cartridge-like, independent component (56) is inserted into the high-pressure chamber (36). Said component comprises the valve carrier (46), the non-return valve (48), the holding element (50), and preferably the filter body (52?). The valve carrier (46) is provided with a conical outer sealing face (69), by which the valve carrier rests against the conical sealing face (44). A fixing element (74) presses the supply line (16) against the valve carrier (46).

Abstract: A control device (52) of a fuel injection valve has a mushroom-shaped intermediate valve member (56) which is guided with a sliding fit (58?) in a first intermediate plate (12). An injection valve member (28), which has a control piston (28?), for opening and closing injection openings in order to realize intermittent injection processes defines a control space (54) together with a guide sleeve (36) and the lower face (12a) of the first intermediate plate (12). A second intermediate plate (14) is situated between the first intermediate plate (12) and a housing body (10), and has a valve space (70) which is hydraulically connected to the end side of a shank (58) of the mushroom-shaped intermediate valve member (56).

Abstract: The invention relates to an injection device for injecting high-pressure fuel into the combustion chamber of an internal combustion engine, the device comprising an injection valve assigned to a discrete reservoir chamber. A non-return valve operates between the chamber and the high-pressure supply line and the filter, which is preferably designed as an edge filter, forms a stop for limiting the opening motion of the valve member that is preferably designed as a valve member plate.

Abstract: Disclosed is a fuel injection valve (4) comprising a control member (70) that is provided with a control passageway (114) which is arranged eccentrically relative to the housing axis (8) and can be opened and closed by a closure piece (96) with the aid of an actuator assembly (26) in order to obtain intermittent injections. The control member (70) is positioned by means of a centering pin (124) in order to define the circumferential position of the eccentric control passageway (114). The centering pin (124) is guided within a pocket bore of the control member (70) as well as within a bore of an intermediate plate (12), a cylindrical element (13), or a spacing sleeve (202). The actuator assembly (26) is designed as an electromagnetic actuator (80) in which the stop (98; 99) for limiting the lift of the pilot valve member is designed as a monolithic component of the intermediate plate (12) or as a flat stop disk (97) in a separate workpiece.

Abstract: The housing body (14) of the fuel injection valve comprises a recess (108), the end region of said recess having a conical tapering (110) on the bottom side thereof. The supporting body (48) engages in said conical tapering (110) with a projection (116) also comprising a conical end region (118). The closing spring (40) is supported on the needle-shaped injection valve member (34) on one side, and on the guiding sleeve (38) on the other side. The guiding sleeve (38) is supported on the supporting body (48) with the front side (461) thereof, whereby the supporting body is held against the tapering (110) in a sealing manner, under the force exerted by the closing spring (40).

Abstract: The invention relates to an injection device for injecting high-pressure fuel into the combustion chamber of an internal combustion engine, said device comprising an injection valve assigned to a discrete reservoir chamber (68). A non-return valve (74) operates between said chamber and the high-pressure supply line (44) and the filter (72), which is preferably designed as an edge filter (72?), forms a stop (106) for limiting the opening motion of the valve member (100) that is preferably designed as a valve member plate (100?).

Abstract: Disclosed is a high-pressure accumulator injection system (10) for an internal combustion engine, preferably a diesel engine. Said injection system (10) comprises a number of injection valves (18) which are connected to a high-pressure conveying device (12) via fuel pipes (16, 14). A reservoir (22) and a check valve encompassing a bypass throttle (24) that is connected in parallel are assigned to each injection valve (18). Said check valve which is assigned to each injection valve (18) and encompasses a bypass throttle (24) that is connected in parallel allows the accumulator injection system (10) to perform stable and reproducible injection processes with a favorable pressure curve during each injection process even when the discrete reservoirs (22) are provided with an unusually low volume. The reservoirs (22) can be integrated in the housing of the injection valves (18). The inventive injection system dispenses with the need for a complex common rail.

Abstract: The movement of an injection valve member, which can be longitudinally displaced and guided in a housing and which is used to close and release injection openings, is controlled of a hydraulic control device which comprises a control body which is maintained in a central bore on the periphery thereof and which is provided with a control duct which is connected to a control area on a lower front-surface side of the control body and which is sealed on another upper front-surface side of the control body and which can be connected to a low pressure area by a pilot valve.

Abstract: The invention relates to a fuel injection valve for intermittent fuel injection into the combustion chamber of internal combustion engines. A needle-shaped injection valve member (34) is arranged in the high-pressure fuel chamber (30) adjacent to the injection valve seat (32), said injection valve member co-operating with the injection valve seat (32) and defining, in a piston-type manner, the cylinder chamber (36) which is connected to the high-pressure inlet (26). The booster piston (28) is controlled by means of the control valve (34) embodied as a flat seat valve, increasing the pressure of the fuel in the high-pressure fuel chamber (30) for an injection, and thus lifting the injection valve member from the injection valve seat. In this way, the injection is carried out with increased pressure.

Abstract: A piston (6) of a piston pump unit (2), which can be displaced in a translatory manner, is guided in a cylinder bore (7). The piston (6) is driven by a crank drive (13) comprising an eccentric element (15) which is arranged on a drive shaft (14). A stroke ring (12) is rotationally mounted on the eccentric element (15) but does not rotate therewith. A sliding surface (10) of the piston (6) is arranged on a sliding bearing surface (11) on the stroke ring (12). A discharge chamber (22) is embodied inside the piston (6) on an end opposite the stroke ring (12). Said discharge chamber is open towards the sliding bearing surface (11). The discharge chamber (22) is connected in a pressure-wise manner to a working chamber (8) by means of a passage (23) in the piston (6). A displaceable control piston (25) is guided in a longitudinal bore (24) pertaining to said passage (23).

Abstract: A fuel injection valve for intermittent injection of fuel into the combustion chamber of a diesel or other form of internal combustion engine. The valve achieves a shorter than usual injection valve member, while avoiding valve member oscillation but retaining precise closing by implementing a solenoid controlled piston that controls movement of the valve. The piston in turn is acted upon by fuel system pressure from a high pressure feed line and from a control chamber, alternatively, depending upon the position of an actuating element. The control piston has an annular land that faces the control chamber and the piston is connected to the high pressure feed line through a tight sliding fit in a piston guide bore establishing a leak gap. A relief chamber is formed between the outlet side of the gap and the land. When the injection valve is open, the land reduces fuel flow from the relief chamber into the control chamber.

Abstract: The opening and closing motion of a control piston effectively connected to an injection valve element is optimally designed in that in addition to a first control space, there is a second control space whose volume and fuel control pressure can be changed by the piston motion. During the opening motion, the pressure in the second control space retards the opening procedure. During the closing motion, the control piston is additionally accelerated by the system pressure when there is a predetermined pressure in the second control space in order to effect rapid closing of the injection openings. Relief elements ensure a pressure balance between the second control space and the high-pressure region. One of the two control spaces is connected to the high-pressure region when there is a predetermined pressure in the second control space.

Abstract: A fuel injection valve (1; 2) for the intermittent injection of fuel into the combustion chamber of an internal combustion engine is equipped with a hydraulic control device (15; 100). The opening or closing of a control bore (61; 109) is brought about by means of an electrically controlled solenoid valve (5; 6; 7), with the result that a control pressure in a control chamber (60; 114) is influenced, thus causing the opening or closing of injection ports into the combustion chamber via a control piston (30; 110) and an injection-valve member (24). The injection event is controlled additionally by controlling the movement of a solenoid-valve pilot-valve stem (70; 125) assigned to the control bore (61; 109). Means, by which the opening movement of the injection valve member (24) takes place in two successive phases, are provided.

Abstract: A fuel injection valve (1; 2) for the intermittent injection of fuel into the combustion chamber of an internal combustion engine is equipped with a hydraulic control device (15; 100). The opening or closing of a control bore (61; 109) is brought about by means of an electrically controlled solenoid valve (5; 6; 7), with the result that a control pressure in a control chamber (60; 114) is influenced, thus causing the opening or closing of injection ports into the combustion chamber via a control piston (30; 110) and an injection-valve member (24). The injection event is controlled additionally by controlling the movement of a solenoid-valve pilot-valve stem (70; 125) assigned to the control bore (61; 109). Means, by which the opening movement of the injection valve member (24) takes place in two successive phases, are provided.

Abstract: The opening and closing motion of a control piston effectively connected to an injection valve element is optimally designed in that in addition to a first control space, there is a second control space whose volume and fuel control pressure can be changed by the piston motion. During the opening motion, the pressure in the second control space retards the opening procedure. During the closing motion, the control piston is additionally accelerated by the system pressure when there is a predetermined pressure in the second control space in order to effect rapid closing of the injection openings. Relief elements ensure a pressure balance between the second control space and the high-pressure region. One of the two control spaces is connected to the high-pressure region when there is a predetermined pressure in the second control space.

Abstract: A fuel injection valve for intermittent fuel injection into a combustion space of a combustion engine comprises an injection valve indirectly actuated electromagnetically by a hydraulic amplifier. The opening motion of the injection valve element remains limited at low and medium injection pressure, while the opening motion of the injection valve element is substantially more rapid and the opening path of the injection valve element substantially larger at high injection pressure than it is at low to medium injection pressure. It is possible to operate the engine over the complete load and rotational speed range under optimum injection conditions.