1 the capacity of the fuel pump 4 is controlled as a function of the fuel demand of the internal combustion engine 1 furthermore the fuel supply system has two suction jet pumps 6 7 one of which delivers fuel from a chamber 8 of the fuel tank 2 into the surge pot 3 the other suction jet pump 6 delivers fuel from the chamber 9 into the surge pot 3 the suction jet pumps 6 7 are in each case supplied with fuel as propellant via a branch 10 11 which leads away from the feed line 5 and have in each case one nozzle 14 15 arranged upstream of a mixing tube 12 13 furthermore in each case one valve 16 17 is arranged in the branches 10 11 the valves 16 17 serve to regulate the volume flow rate of fuel which the suction jet pumps 6 7 obtain fig2 is a greatly enlarged sectioned illustration through a structural unit of the valves 16 17 and of the nozzles 14 15 of the suction jet pumps 6 7 from fig1 the structural units are of identical construction it can be seen here that a valve body 18 of the valve 16 17 has a narrowing section 19 with which it projects into an opening 20 of the nozzle 14 15 of.