Force modification of passive valve spools for control of nozzles

A system comprising:

• an injector including a scheduling valve assembly and a nozzle in fluid communication with the scheduling valve assembly, wherein the scheduling valve assembly is configured for regulation of flow from an inlet of the injector to the nozzle;
• and
• an electromagnetic device operatively connected to a hydromechanical valve spool of the scheduling valve assembly to selectively adjust position of the hydromechanical valve spool in the scheduling valve assembly;
• wherein the electromagnetic device includes:
• a first permanent magnet mounted on the hydromechanical valve spool;
• and
• a first electromagnet mounted to the scheduling valve assembly proximate to the first permanent magnet for selectively applying a force to the first permanent magnet to adjust position of the hydromechanical valve spool within the scheduling valve assembly;
• a second permanent magnet mounted to the hydromechanical valve spool at a position upstream relative to the first permanent magnet;
• and
• a second electromagnet mounted to the scheduling valve assembly proximate the second permanent magnet at a position in the hydromechanical valve assembly upstream relative to the first electromagnet;
• wherein the first permanent magnet and the first electromagnet are mounted proximate a downstream end of the scheduling valve assembly.