Patent ID: 11913381
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A system comprising:
an injector including a scheduling valve assembly and a nozzle in fluid communication with the valve assembly, wherein the scheduling valve assembly is configured for regulation of flow from an inlet of the injector to the nozzle, wherein the injector includes two fluid circuits between the inlet of the injector and two respective outlets of the nozzle for staged flow output from the nozzle, wherein a first one of the two fluid circuits is a primary circuit, and wherein a second one of the two fluid circuits is a secondary circuit; and
a separate valve connected in fluid communication with the scheduling valve assembly, wherein the separate valve is configured to adjust position of a hydromechanical valve spool of the valve assembly, wherein the valve spool is biased to a closed position by one or more biasing members of the scheduling valve assembly, wherein the valve spool is configured to regulate flow from the inlet of the injector to each of the primary and secondary circuits, and wherein the valve spool includes a scheduling surface configured to vary flow area through the secondary circuit based on position of the valve spool within the scheduling valve assembly, wherein the separate valve is a solenoid valve that has an inlet, an outlet, and a solenoid valve member configured to control flow through the solenoid valve from the inlet to the outlet based on electrical power applied to an armature of the solenoid valve, wherein the inlet of the solenoid valve is connected in fluid communication with the inlet of the injector, and wherein the outlet of the solenoid valve is connected in fluid communication with the secondary circuit, wherein the outlet of the solenoid valve connects to the secondary circuit at a position in the secondary circuit that is downstream of the valve assembly.