| 摘要 |
A fuel injector for fuel injection systems of internal combustion engines has a valve-closure member (4) that is in working engagement with a valve needle (3) and that coacts with a valve-seat surface (6), positioned in an orifice of a valve-seat member (5), to form a sealing seat; and has at least one spray discharge opening (7) positioned in the valve-seat member (5). Between the valve-seat surface (6) and the spray discharge opening (7), a second surface (36) that encloses with the center axis (37) of the fuel injector (1) a more acute angle (beta) than the valve-seat surface (6) is formed by the orifice of the valve-seat member (5). A closure element extension (35), whose enveloping surface (39) forms an obtuse angle with the contiguous contour of the valve-closure member (4), is positioned at the downstream end of the valve-closure member (4).
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