FUEL DOSE REGULATING DEVICE FOR TURBO MACHINES

摘要

A fuel control system for a turbine engine includes a fuel flow regulator comprising a double differential piston slidable in a sleeve to vary the opening and closing of a fuel inlet or outlet and thereby regulate the output flow of fuel from the regulator. A first fixed stop limits the movement of the piston in one direction to define the maximum output flow of fuel permitted by the regulator, while a second stop, in an operative safety position, limits the movement of the piston in the opposite direction to define a minimum fuel output threshold. The second stop can, however, be retracted to an inoperative position by actuation of a control circuit to allow the minimum fuel output threshold to be overcome and the regulator piston to reach an extreme nil outflow position.