METHOD AND APPARATUS GENERATING MULTIPLE PRESSURE SIGNALS IN A FUEL SYSTEM

摘要

A fuel system includes a first fuel line carrying fuel at a first line pressure (P22), a second fuel line carrying fuel at a second line pressure (PFNC) greater than the first line pressure (P22), at least one pressure regulating section 102 having an input 101 connected to the second fuel line and at least one output (103), a first pressure regulator (120) connected to the input and a second pressure regulator (130) connected between the first pressure regulator (120) and the at least one output (103), and a controller (160) controlling the position of the first and second pressure regulators (120, 130) to produce at the output (103) one of a predetermined number of output pressures relative to the first line pressure (P22).