Circuit layout for controlling an electric fuel pump has an electric fuel pump in a fuel tank to feed fuel to a high-pressure pump linked to fuel injection valves and a signal-controlled motorized control for delivery power

摘要

In a control circuit (11) there is a pressure-detecting circuit (17), as well as a PID regulator (20) and an interface circuit (22). A temperature model circuit (18) determines highest temperature (Tmax) in a fuel delivery system. A pressure-determining circuit (19) determines scheduled fuel pressure (Psoll) based on maximum temperature. A separate circuit (21) also generates control signals. An Independent claim is also included for a method for controlling an electric fuel pump in a non-return fuel delivery system.