Patent ID: 6912990

Claim:
In a fuel injection system for an internal combustion engine, having a fuel injection valve ( 12 ), which has an injection valve member ( 34 ), by which valve member at least one injection opening ( 36 ) is controlled, and the injection valve member ( 34 ) is acted upon by the pressure prevailing in a pressure chamber ( 44 ) of the fuel injection valve ( 12 ) and is movable by this pressure, counter to the force of a closing spring ( 48 ) disposed in a spring chamber ( 50 ) of the fuel injection valve ( 12 ), in an opening direction to open the at least one injection opening ( 36 ), and fuel is delivered under high pressure to the pressure chamber ( 44 ) by a high-pressure fuel pump ( 10 ) for a fuel injection, the improvement wherein the injection valve member ( 34 ) is urged in the closing direction at least indirectly by the pressure prevailing in a spring chamber ( 50 ) of the fuel injection valve ( 12 ); and wherein the pressure in the spring chamber ( 50 ) is variable, further comprising a spring plate ( 49 ), which rests on the closing spring ( 48 ) in the spring chamber ( 50 ), the injection valve member ( 34 ) being braced on said spring plate via a peg ( 60 ) of smaller cross section than the valve member, which peg passes through an opening ( 59 ) in a partition ( 58 ) of the spring chamber ( 50 ).