Abstract: The invention relates to an injection device (1), in particular for an exhaust aftertreatment system of an internal combustion engine, comprising a pressure-controlled, outward-opening fuel injection valve (2) that includes an axially movable valve piston (6) which penetrates a flow opening (7) in a valve body (5) and one end of which has a valve tip (9), further comprising a valve seat (8) associated with the flow opening (7), and at least one spring element (11) which urges the valve piston (6) comprising the valve tip (9) against the valve seat (8) so that the flow opening (7) is closed; the valve tip (9) is axially movable inside a flow chamber (15) formed by the valve body (5) and by an injection orifice disk (14) that includes a plurality of injection ports (19).

Abstract: The invention relates to an injection device (1), in particular for an exhaust aftertreatment system of an internal combustion engine, comprising a pressure-controlled, outward-opening fuel injection valve (2) that includes an axially movable valve piston (6) which penetrates a flow opening (7) in a valve body (5) and one end of which has a valve tip (9), further comprising a valve seat (8) associated with the flow opening (7), and at least one spring element (11) which urges the valve piston (6) comprising the valve tip (9) against the valve seat (8) so that the flow opening (7) is closed; the valve tip (9) is axially movable inside a flow chamber (15) formed by the valve body (5) and by an injection orifice disk (14) that includes a plurality of injection ports (19).

Abstract: A sensor element or an actuator element, in particular for use in motor vehicles, has an anti-adhesive surface coating as a protective layer, to reduce an accumulation, for example, of dirty water, mineral oil, silicon oil, soot, salts, hydrocarbons, dust particles or a combination of at least two of these substances. The surface coating is particularly temperature-stable, firmly adhering, and has a low surface energy. It contains at least one compound, selected from the group of fluorinated polymers, fluorormocers, of the polymeric fluorocarbon resins, of the fluorine-containing silanes, or of partially fluorinated polymers.