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: In a fuel injection nozzle having a nozzle body (12), which body has one first and one second group of injection ports (14, 16), one first and one second nozzle needle (18, 20), and one separate pressure chamber (24, 34) for each nozzle needle, so that these are adjustable independently of one another between a closed position, in which the injection ports associated with the corresponding nozzle needle are closed, and an injection position, in which the corresponding injection ports are opened, a free choice of injection cross sections is to be made possible, while the design is simple. To that end, it is provided that the two nozzle needles adjoin one another.

Abstract: In a fuel injection system for internal combustion engines, having two control valves (15, 34), provided for controlling the injection event, whose valve bodies each have one magnetically attractable armature (41, 45), and having a common magnet coil (40) for the two armatures (41, 45), in a first current stage of the common magnet coil (40), only one armature (41), and in a higher second current stage both armatures (41, 45), are each attractable counter to the action of a closing force. Thus with only a single magnet drive mechanism, two valve functions can be switched via two exciter currents of different magnitudes.

Abstract: The invention relates to a fuel injection apparatus for an internal combustion engine, having an injection valve (14) that protrudes into the combustion chamber of the engine. This valve communicates with a valve chamber (6.1), in that a control part (6) closes and opens inlet bores (5, 8) for fuel that is at high pressure. The control part (6) is actuatable by means of a hydraulic-mechanical booster (18, 19, 20, 21). The pump part (P), valve part (V) and nozzle part (D) of the fuel injection apparatus (1) are disposed in a vertical arrangement, hydraulically in line with one another in terms of the fuel flow.

Abstract: In a fuel injection system (1) for internal combustion engines, including an electronically triggered control valve (9) with an axial through bore (10), which is divided by two valve seats (19, 20) into three annular chambers (11, 12, 13), to which respectively a supply line (7) for fuel at high pressure, a high-pressure line (15) leading away to an injection valve (8), and a relief line (17) are connected, and having a control piston (14), which is guided in the through bore (10) and which has two valve sealing faces (24, 27) cooperating with the two valve seats (19, 20), respectively, the control piston (14) according to the invention has a further valve sealing face (25), which cooperates with the first valve seat (19) and whose spacing (h1) from the first valve sealing face (24) is at least equal to the spacing (h2) between the second valve sealing face (27) and the second valve seat (20) when the first sealing seat is closed.

Abstract: A fuel injection valve for internal combustion engines, having a valve member that is axially displaceable in a valve body and that with a sealing face cooperates, to control an injection opening, with a valve seat face on the valve body. An end of the valve member remote from the combustion chamber is urged in the closing direction by a valve spring disposed in a spring chamber. The valve member has a pressure shoulder acting in the opening direction, which protrudes into a pressure chamber that is filled with high fuel pressure. Via a throttle gap, the spring chamber communicates with the pressure chamber and is sealed off from a fuel return system, so that during the opening stroke motion of the valve member the spring chamber acts as a hydraulic damper.

Abstract: A fuel injection valve for internal combustion engines, having a valve member guided axially displaceably in a bore of a valve body. On an end of the valve member toward the combustion chamber, a valve sealing face is disposed, with which the valve member cooperates with a valve seat face on the valve body to control an injection cross section. At least one valve spring that acts upon the valve member and is inserted into a spring chamber is provided in a valve retaining body that is braced axially against the valve body. The spring chamber is closed on one end remote from the combustion chamber by a lid. The lid is secured to the valve retaining body by a crimped connection.

Abstract: A fuel injection valve for internal combustion engines having a valve element which is axially displaceable in a valve body and a valve retention body, which is configured as a twin-spring retainer and in which are arranged first and second valve springs acting on the valve element in the closing direction. The first valve spring acts continually on the valve element via a pressure pin, whereas the second valve spring acts on the valve element only after a certain opening stroke motion of the valve element, which motion traversed forms a preliminary stroke (h1), and, by this motion, subdivides the opening stroke motion of the valve element into a preliminary stroke against the force of the first valve spring and a residual stroke against the force of the first and second valve springs.