| 摘要 |
A fuel injection valve for internal combustion engines includes a valve body ( 1 ) in which a bore ( 5 ) is defined in one end, in which a first row of injection openings ( 20 ) and a second row of injection openings ( 22 ) are formed. In the bore ( 5 ), an outer valve needle ( 8 ) cooperates with the valve seat ( 18 ) for controlling the first row of injection openings ( 20 ); between the outer valve needle ( 8 ) and the wall of the bore ( 5 ), a pressure chamber ( 14 ) is formed. In the outer valve needle ( 8 ), an inner bore ( 11 ) is formed, in which an inner valve needle ( 10 ) is located and which cooperates with the valve seat ( 18 ) for controlling the second row of injection openings ( 22 ). A pressure shoulder ( 30 ) is formed on the inner valve needle. A hydraulic opening force is exerted on the inner valve needle ( 10 ); by its opening stroke, the outer valve needle ( 8 ) opens a throttle connection ( 32 ) from the pressure chamber ( 14 ) to the pressure shoulder ( 30 ) of the inner valve needle ( 10 ).
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