FUEL SUPPLY SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE

摘要

According to the invention, the fuel supply system for an internal combustion engine includes a pumping assembly (5a, 5b) provided between a fuel injection rail (4) with a pressure sensor (22) and a fuel tank (6), a first controlled valve (9) for adjusting the fuel flow fed to a high pressure pump (5b) of the pumping assembly, a second controlled valve (11) for adjusting the pressure of the fuel stored in the injection rail (4), and means (30) for determining a set point pressure in the injection rail (4) based on operational parameters of the engine (1). The system includes two closed loops for adjusting said first (9) and second (11) controlled valves, the two adjustment closed loops using the pressure measured in the injection rail (4), being cascade-connected and being simultaneously active.