Fuel supply system for the decontamination of the injection dose rate

摘要

The fuel feed circuit has a main filter (3) in the fuel line between low-pressure (1) and high-pressure (3) pumps, and a fuel doser (8) linked to injectors (10). It also has a self-cleaning filter (4) situated after the high-pressure pump and comprising a filter cartridge parallel to the flue flow (9). The fuel doser (8) is fed with portion of fuel taken from the self-cleaning filter perpendicular to the fuel flow; a second portion of the fuel passes through the centre of the filter and is re-injected ahead of the main filter by a regulator valve (11). The regulator valve is controlled by a pressure difference detector (12) located parallel to the doser.