Patent ID: 6871636

Claim:
A fuel injection system ( 1 ) for internal combustion engines, comprising a plurality of injection valves ( 5 ), each provided in an injection line ( 4 ) for the fuel, each injection valve ( 5 ) having a nozzle chamber ( 12 ) and a control chamber ( 15 ), which both communicate with the injection line ( 4 ); a valve member ( 7 ), which controls the injection openings ( 11 ) of the nozzle chamber ( 12 ) and which is actuatable via a first control face ( 13 ), located in the nozzle chamber ( 12 ) and acting in the valve opening direction, and via a second control face ( 14 ), located in the control chamber ( 15 ) and acting in the valve closing direction; a first valve ( 18 ) for controlling the pressure prevailing in the control chamber ( 15 ); a second valve ( 28 ) for switching the injection pressure, the valves ( 18 , 28 ) having one common valve body ( 30 ) and the stroke (H 2 ) of the valve body ( 30 ) required to close the first valve ( 18 ) being greater than the stroke (H 1 ) required to open the second valve ( 28 ).