Patent ID: 6973918

Claim:
A fuel injection apparatus for an internal combustion engine, the apparatus comprising a high-pressure fuel pump ( 10 ) and a fuel injection valve ( 12 ) connected to it for each cylinder of the engine, the high-pressure fuel pump ( 10 ) having a pump piston ( 18 ) that is driven into a stroke motion by the engine and delimiting a pump working chamber ( 22 ) connected to a pressure chamber ( 40 ) of the fuel injection valve ( 12 ), the fuel injection valve ( 12 ) having at least one first injection valve element ( 28 ) that controls at least one first injection opening ( 32 ) and can be moved in an opening direction ( 29 ) counter to a closing force by the pressure prevailing in the pressure chamber ( 40 ) in order to open the at least one first injection opening ( 32 ), and an electrically actuated control valve ( 60 ) that at least indirectly controls a connection of the pump working chamber ( 22 ) to a discharge region ( 24 ), the fuel injection valve ( 12 ) having a second injection valve element ( 128 ) guided so that it can slide inside the first injection valve element ( 28 ), the first injection valve element ( 28 ) being embodied as hollow, the second injection valve element ( 128 ) controlling at least one second injection opening ( 132 ) and being supported for movement in an opening direction ( 29 ) counter to a second closing force by the pressure prevailing in a pressure chamber ( 40 ) in order to open the at least one second injection opening ( 132 ), the second injection valve element ( 128 ) being acted on at least indirectly in a closing direction by the pressure prevailing in a fuel-filled control pressure chamber ( 54 ), the control pressure chamber ( 54 ) is connected by means of a connection ( 70 ; 170 ) controlled by a valve ( 72 ; 172 ), to a pressure region ( 71 ; 171 ) in which a respective pressure increase and pressure decrease are delayed in relation to those occurring in the pump working chamber ( 22 ) when the control valve ( 60 ) respectively closes and opens, and the valve ( 72 ; 172 ) having a valve element ( 76 , 80 ; 176 ) that is acted on in the opening direction by the pressure prevailing in the pressure region ( 71 ; 171 ) and is acted on in the closing direction by the pressure prevailing in the pump working chamber ( 22 ).