Patent ID: 6962141

Claim:
A device for injecting fuel into a combustion chamber ( 7 ) of an internal combustion engine, comprising a high-pressure accumulator ( 2 ), a pressure booster ( 5 ), a metering valve ( 6 ), the pressure booster ( 5 ) having a working chamber ( 10 ) and a control chamber ( 11 ) separated from each other by an axially moving piston ( 12 ; 13 , 14 ), a pressure change in the control chamber ( 11 ) of the pressure booster ( 5 ) causing a pressure change in a compression chamber ( 15 ) of the pressure booster ( 5 ), the compression chamber ( 15 ) communicating with a hydraulic chamber ( 31 ) associated with an injection valve element ( 34 ), and control sections ( 19 , 21 ) provided on the piston ( 12 ; 13 , 14 ) that acts on the compression chamber ( 15 ) of the pressure booster ( 5 ) for relieving the pressure in the hydraulic chamber ( 31 ) of the injection valve element ( 34 ).