Abstract: Normally, the fuel pressure in a forward-flow fuel pipe leading to an internal-combustion engine is controlled in such a manner that a pressure regulator branches off a partial flow into a return-flow pipe which leads without pressure into a fuel tank. Normally, the branch-off pipe as well as the pressure regulator are arranged close to the internal-combustion engine in a closed-off engine compartment, for example, of a motor vehicle. However, as a result, not only the fuel flow returned by way of the return-flow pipe will heat up but, as a result of the waste heat of the internal-combustion engine, also the fuel volume situated in the fuel tank. As a remedy, it is suggested to arrange the branch-off pipe as well as the pressure regulator outside the engine compartment close to the fuel tank. A reversing valve as well as a rinsing pipe are also suggested in order to rinse, after the start of the internal-combustion engine, the injection strip with the complete fuel flow delivered by the pump.