Patent ID: 7044110

Claim:
A fuel injection device for an internal combustion engine, having a fuel-supply pump ( 10 ) that delivers fuel from a fuel tank ( 12 ) to a high-pressure pump ( 18 ) via a connection ( 16 ), wherein the high-pressure pump ( 18 ) delivers fuel to a reservoir ( 24 ), which is connected to at least one injector ( 26 ) that injects fuel into the internal combustion engine, having a fuel filter ( 20 ) disposed between the fuel-supply pump ( 10 ) and the high-pressure pump ( 18 ), wherein a return line ( 60 ) for fuel from the at least one injector ( 26 ) and/or from the reservoir ( 24 ) to a low-pressure region is provided, the improvement comprising an additional fuel filter ( 62 ) in the return line ( 60 ), downstream of the fuel filter ( 20 ), the return line ( 60 ) feeding into the connection ( 16 ) between the fuel-supply pump ( 10 ) and the high-pressure pump ( 18 ), wherein the return line ( 60 ) contains a check valve ( 64 ) that opens toward the opening of the return line ( 60 ) into the connection ( 16 ).