instant of injection for overall injection control is ascertained with an injection time transducer 30 in this exemplary embodiment this may be a transducer that detects the position of the roller ring but other injection time transducers such as needle stroke transducers and the like may also be provided via a gas pedal 32 the torque desired by the driver operating the engine is fed to the control device 23 other parameters such as the temperature t or the density of the air supplied to the engine combustion chambers can be taken into account in forming the fuel quantity signal controls of this kind are well known and need no further description here to adjust the injection timing an injection adjuster piston 34 is also provided which is displaceable in a working cylinder 35 and is coupled with the roller ring 6 one side of the injection adjusting piston 34 is loaded by a restoring spring 37 and the other side encloses a work chamber 38 in the working cylinder the work chamber 38 communicates with the fuel supply chamber 9 via a throttle 39 as the pressure in the fuel supply chamber rises with the increasing rpm the injection adjuster piston 34 is displaced counter to the force of the spring 37 and thereby rotates the roller ring 6 such that the piston stroke movement takes place at an earlier rotational angle of the injection pump drive shaft 27 the above described system relates to a known fuel injection pump of the distributor pump type having electrical control electrical controls of this kind may fail for various reasons or may malfunction and so supplementary measures are advantageously provided to assure that a maximum rpm of the engine supplied by.