Abstract: The invention relates to a device for injecting fuel into the combustion chambers of an internal combustion engine, with a pump (2), which supplies highly pressurized fuel to a high-pressure accumulation chamber (3). Starting from this high-pressure accumulation chamber (3), a high-pressure supply line leads to an injector (5), which contains a metering valve (7) that acts on an injection nozzle (24) with fuel. The metering valve (7) is associated with a damping throttle (26), which is connected to a part of the high-pressure region.

Abstract: A fuel injection system with a fuel injection valve (15) and a control valve (50), which control valve (50) has a control valve member (54) that can move longitudinally in a control valve bore (52). The control valve member (54) is provided with a control valve sealing surface (55), which cooperates with a control valve seat (56) and thereby controls the connection between a first pressure chamber (57) and a second pressure chamber (58), where the first pressure chamber (57) is connected to a high-pressure accumulation chamber (10). A bore (30) is embodied in a valve body (25) and contains a piston-shaped valve needle (32) whose end oriented toward the combustion chamber controls the opening of at least one injection opening (38) by virtue of the fact that it executes a longitudinal movement due to the impingement of the pressure in a pressure chamber (31); the pressure chamber (31) is connected to the second pressure chamber (58) by means of a supply conduit (28).

Abstract: A fuel injection system, having a fuel injection valve (15) and a control valve (50), which control valve (50) has a control valve member (54) that is longitudinally displaceable in a control valve bore (52). A control valve sealing face (55) is embodied on the control valve member (54); it cooperates with a control valve seat (56) and thus controls the communication between a first pressure space (57) and a second pressure space (58); the first pressure space (57) communicates with a high-pressure collection chamber (10). In a valve body (25), a bore (30) is embodied in which a pistonlike valve needle (32), with its end toward the combustion chamber, controls the opening of at least one injection opening (38) by executing a longitudinal motion in response to the pressure in a pressure chamber (31); the pressure chamber (31) communicates with the second pressure space (58) via an inlet conduit (28).

Abstract: A fuel injection system having a fuel injection valve (1), which has a valve body (20) in which a valve member (60) is disposed axially movably in a bore (62), which valve member is longitudinally displaceable, hydraulically controlled by the fuel pressure in a pressure chamber (64), counter to a closing force and thereby controls at least one injection opening (68). A control valve (30) is disposed in the fuel injection valve; it includes a control valve member (32) that is longitudinally displaceable in a control valve bore (38), which control valve member (32), in a first position, opens the communication from a high-pressure fuel source (10) to the pressure chamber (64) and, in a second position, connects the pressure chamber (64) to a control chamber (50) and thereby interrupts the communication with the high-pressure fuel source (10).

Abstract: An internal combustion engine, in particular with direct injection, is operated according to a method in which a first fuel pump delivers fuel from a fuel tank. At least a part of the delivered fuel travels on via at least one inlet valve into at least one working chamber of a second fuel pump embodied as a positive-displacement pump. This second fuel pump delivers the fuel to a fuel accumulation line. In order to increase the efficiency during operation of the engine and to reduce costs, the invention proposes that the relative opening duration of the inlet valve be influenced in order to thus change the fuel quantity traveling into the working chamber (40) of the second fuel pump.