| 摘要 |
<p>The injection nozzle for compression ignition engines has a valve formed from a valve needle and seat for regulating the fuel stream between a pressure space and injection openings as well as controlling the cross-section of part of the injection openings. A push rod (12) upstream of the valve controls at least part of the cross section of the injection openings. It operates independently of the fuel supplied. The rod (12) is guided in a blind bore (10) of the nozzle body (8) from which the injection openings (6,7) branch out. The rod (12) has a central bore (14) serving to supply the fuel. It is pressure- equalised and initiated by the fuel. The rod (12) can have an outer thread (13) meshing with an inner thread (11) of the blind bore (10). Rotation of the push rod changes the cross-section of the injection holes (7).</p> |
