| 摘要 |
PCT No. PCT/DE93/00447 Sec. 371 Date Dec. 12, 1994 Sec. 102(e) Date Dec. 12, 1994 PCT Filed May 21, 1992 PCT Pub. No. WO93/25814 PCT Pub. Date Dec. 23, 1993.A fuel injection nozzle for internal combustion engines has a nozzle body and an outward-opening valve needle with a closing head. To produce tightly focused injection streams, the closing head has, in addition to a valve cone that cooperates with a valve seat on the nozzle body, a piston acted upon by fuel, with a jacket cut away by means of a recess and pierced by openings. The discharge orifice of the openings is axially offset from the valve cone, so that the injection cross sections, which are elongated and axially parallel, are not opened up by a control edge on the valve seat until after an idle stroke. A relief groove between the valve cone and the piston of the closing head assures a defined contact of the valve cone with the valve seat.
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