electric signal on the basis of signals from the position and speed indicator 17 and other data in the illustrated construction each fuel injector 2 has two fuel feed or supply pipes or conduits 23 24 in the fuel feed or supply pipe 24 which also contains the pressure sensor 19 there is connected a throttle 25 as well as a pressure tank or pressure chamber 26 for each fuel injector 2 fig2 and 3 show an individual fuel injector 2 in detail and in section at location 27 the feed pipe 23 is connected to the multipart casing 28 of fuel injector 2 and is connected through a channel 29 to an annular chamber 30 as is more clearly shown in fig3 the annular chamber 30 is connected via a radial throttle bore 31 to a channel 32 which towards the fuel injection end of the fuel injector 2 is constantly flow connected to a control chamber 35 via a throttle bore 33 formed in an interchangeable disk 34 defining a check valve control chamber 35 is sealingly closed in the direction of the fuel injection end of the fuel injector 2 by the piston 36 of a nozzle needle 37 a weak compression spring 38 fig3 is arranged between the piston 36 and the disk 34 having the throttle bore 33 and which slides axially in control chamber 35 this compression spring 38 attempts on the.