Abstract: A fuel injector having an integrated spark plug for injecting fuel directly into a combustion chamber of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber has a valve body, which, together with a valve-closure member, forms a sealing seat. Disposed contiguously to the sealing seat is a discharge orifice, which discharges at a valve-body end face facing the combustion chamber. Provision is also made for a housing body that is insulated from the valve body, and for an ignition electrode that is connected to the housing body. In this context, a spark arc-over is produced between the valve body and the ignition electrode. The ignition electrode and the valve body are formed so that the spark arc-over occurs between the end face of the valve body facing the combustion chamber and the ignition electrode.

Abstract: A fuel injector having an integrated spark plug (1) for injecting fuel directly into a combustion chamber (72) of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber (72) has a valve body (7), which, together with a valve-closure member (10), forms a sealing seat. Disposed contiguously to the sealing seat is a discharge orifice (12), which discharges at a valve-body (7) end face (73) facing the combustion chamber (72). Provision is also made for a housing body (2) that is insulated from the valve body (7), and for an ignition electrode (70a) that is connected to the housing body (2). In this context, a spark arc-over is produced between the valve body (7) and the ignition electrode (70a). The ignition electrode (70a) and the valve body (7) are formed in such a way that the spark arc-over takes place between the end face (73) of the valve body (7) facing the combustion chamber (72) and the ignition electrode (70a).

Abstract: A fuel injector having an integrated spark plug (1) for injecting fuel directly into a combustion chamber (72) of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber (72) has a valve body (7), which, together with a valve-closure member (10), forms a sealing seat. Disposed contiguously to the sealing seat is a discharge orifice (12), which discharges at a valve-body (7) end face (73) facing the combustion chamber (72). Provision is also made for a housing body (2) that is insulated from the valve body (7), and for an ignition electrode (70a) that is connected to the housing body (2). In this context, a spark arc-over is produced between the valve body (7) and the ignition electrode (70a). The ignition electrode (70a) and the valve body (7) are formed in such a way that the spark arc-over takes place between the end face (73) of the valve body (7) facing the combustion chamber (72) and the ignition electrode (70a).

Abstract: A method for producing bores in workpieces of electrically conductive material, in particular injection ports (11) in injection nozzles (10) is disclosed, in which method, by means of an erosion wire (12) forming an electrode, material in the workpiece forming the counterelectrode is removed in a targeted way by spark erosion. To produce bores of different cross-sectional shapes and/or a varying cross-sectional area over the length of the hole, the erosion wire (12) is actively excited to a defined vibration, and the form of vibration is established by targeted variation of the vibration excitation in accordance with the desired bore hole shape. A preferred apparatus for performing the method has a fastening unit (13), which receives the end (122) of the erosion wire (12) and which is driven by two actuators (14, 15) to execute a separate oscillating displacement along an x axis and a y axis (FIG. 1).

Abstract: A fuel injection nozzle or fuel injector valve has a nozzle body, extending along a longitudinal axis, on which is configured a valve seat surface which coacts with a valve closure surface configured on a valve closure element to form a valve seat. At least one fuel stream, which has a radial directional component with respect to the longitudinal axis of the nozzle body, is sprayed out when the fuel injection valve or fuel injector nozzle is in an open state. A sleeve body axially overlaps the fuel stream in the direction of the longitudinal axis. The sleeve body has at least one impact surface which the fuel stream strikes. The impact surface is inclined at a predefined angle with respect to a vertical plane which runs vertically with respect to the longitudinal axis, and/or the impact surface is structured in fluted fashion on its surface.

Abstract: A fuel injection device for internal combustion engines, having a high-pressure fuel pump, which pumps fuel from a low-pressure chamber via a feed line into a high-pressure collection chamber that communicates via high-pressure lines with the individual injection valves that protrude into the combustion chamber of the engine to be supplied. In order for this system to make variable injection cross sections at the injection valves possible, these injection valves are embodied as injection valves with an outward-opening valve member, via whose controllable opening stroke motion in the direction of the combustion chamber, a variable injection cross section can be adjusted at the injection valve.