Patent ID: 6889656

Claim:
A fuel supply system for delivering fuel for an internal combustion engine, comprising a fuel tank, a first fuel pump ( 6 ) for pumping a variable pumping capacity, a mechanically driven second fuel pump ( 12 ), and at least one fuel injection valve ( 16 ), wherein the first fuel pump ( 6 ) delivers the fuel from the fuel tank into a fuel line connection ( 10 ) and the second fuel pump ( 12 ) delivers the fuel from the fuel line connection ( 10 ) by way of a fuel pressure line ( 14 ) to the fuel valve ( 16 ), via which the fuel travels at least indirectly into a combustion chamber of the engine, the first fuel pump ( 6 ) delivers the fuel into the fuel line connection ( 10 ) with a delivery capacity that is changed as a function of an operating condition of the engine, in which two pressure control valves ( 26 , 28 ), which are hydraulically and functionally parallel and are set to different pressure values, are provided for monitoring a delivery pressure prevailing in the fuel line connection ( 10 ).