Patent ID: 6971587

Claim:
A fuel injection system ( 10 ) for an internal combustion engine with direct injection, the system comprising a fuel injection device ( 16 ) which can inject fuel directly into a combustion chamber ( 18 ) of the engine, the fuel injection device having a valve element ( 70 ) which borders on a work chamber ( 79 ) and the position of the valve element ( 70 ) depending on the pressure in the work chamber ( 79 ), a pressure booster piston ( 54 ), which on one side borders on a control chamber ( 96 ) and on the other side borders on a high-pressure chamber ( 76 ), a fuel supply ( 14 ), which can subject the control chamber ( 96 ) to various pressures, the pressure booster piston ( 54 ) being integrated with the fuel injection device ( 16 ), and the high-pressure chamber ( 76 ) being integrated with the work chamber ( 79 ).