Patent ID: 6453878
Filing Date: 2002-09-24
Classification: F02D,F02M

Abstract:
A fuel supply circuit for an internal combustion engine, including a fuel pump driven by an electric motor, pumping fuel stored in a fuel tank and supplying a fuel manifold supplying at least one fuel injector, with the assistance of at least one fuel pressure regulator, having a pressure characteristic which is known to an electronic control unit controlling said pump motor for aligning a pump output pressure to a target pressure determined by said electronic control unit on the basis of a relationship between said pump output pressure and at least an average current fed to said pump motor;wherein said fuel pressure regulator is of a pressure regulator/pressure reducing valve type disposed immediately upstream of said fuel manifold and has an operating pressure defining a fuel pressure,in said fuel manifold which is deprived of any fuel return pipe returning to said fuel tank, and said target pressure is determined by said electronic control unit so as to be greater than said pressure regulator operating pressure.