| 摘要 |
The invention relates to a fuel injector for a fuel injection system, in particular a common rail injection system, comprising a nozzle needle (1) with a reciprocating movement for opening and closing at least one injection opening (2), wherein the nozzle needle (1) is loaded in the closing direction by a control pressure which prevails in a control chamber (3) which can be relieved via an outflow throttle (5) in the open position of a switching valve (4), with the result that the reciprocating movement of the nozzle needle (1) can be controlled via the switching position of the switching valve (4). According to the invention, the outflow throttle (5) has a cross section which, starting from a control chamber-side inflow edge (7) widens continuously in the flow direction (6) of the outflowing fuel over the entire length of the outflow throttle (5). |
