Injection valve
OwnerPatrick Mattesinventor
Life of this patent
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OwnerPatrick Mattesinventor
Estimating the term…
An injection valve is proposed, including at least a nozzle module (2), which has a valve control piston (4), cooperating with a nozzle needle, and a valve control chamber (5) defined by a spring plate (21) and a face end (6) of the valve control piston (4), which valve control chamber communicates with a high-pressure supply line (9) via an inlet conduit (7) and is operatively connected, via an outlet conduit (24), with a valve control module (3) that is actuated by means of a piezoelectric actuator unit and is embodied in valvelike fashion and has at least one valve closing member (14), disposed in a valve chamber (18) and cooperating with at least one valve seat (16, 17); the nozzle needle is opened via a pressure reduction in the valve control chamber (5), effected by means of the valve control module (3) via the outlet conduit (24), and is closed via a filling of the valve control chamber (5). To achieve fast closure of the nozzle needle, the injection valve has means for filling the valve control chamber (5) via the inlet conduit (7) and the outlet conduit (24).
An injection valve, in particular for an internal combustion engine, including at least a nozzle needle (2), which has a valve control piston (4) that cooperates with a nozzle needle and a valve control chamber (5), which control chamber is defined by a spring plate (21) and a face end (6) of the valve control piston (4) and which communicates, via a first inlet conduit (7), provided with an inlet throttle (8), with a high-pressure supply line (9) and is operatively connected, via a second outlet conduit (24), provided with an outlet throttle (25), with a valve control module (3), actuated by means of an in particular piezoelectric actuator unit and embodied in valvelike fashion, which valve control module has at least one valve closing member (14), disposed in a valve chamber (18) and cooperating with at least one valve seat (16, 17), wherein the nozzle needle is opened via a pressure reduction, effected by means of the valve control module (3), in the valve control chamber (5) via the outlet conduit (24) that has the outlet throttle (25), and is closed via a filling of the valve control chamber (5) and thus a pressure increase therein, characterized by means for filling the valve control chamber (5) via the inlet conduit (7), having the inlet throttle (8), and the outlet conduit (24), having the outlet throttle (25).
Dependencies are inferred from the claim text.