초록 ▼

A fuel system for a gas turbine aircraft engine including a ecology valve and a flow divider valve, both of simple and compact construction. The ecology valve is connected to the fuel manifolds supplied by the splitter valve, and serves to suction fuel from the fuel manifolds upon engine shutdown. T

A fuel system for a gas turbine aircraft engine including a ecology valve and a flow divider valve, both of simple and compact construction. The ecology valve is connected to the fuel manifolds supplied by the splitter valve, and serves to suction fuel from the fuel manifolds upon engine shutdown. The fuel is temporarily stored in reservoirs in the ecology valve and upon the next engine operating cycle, is returned to the manifold so that it can be burned. The splitter valve is of simplified light-weight construction and includes a single piston operated in two regions, a first for modulating primary and second flow depending on fuel pressure, and a second region for providing a fixed, port geometry determined split between the primary and secondary.

대표청구항 ▼

[ What is claimed is:] [1.] A fuel system for use in an aircraft engine, the fuel system comprising:a fuel pump for pressurizing fuel from a fuel supply, a plurality of fuel nozzles arranged in a combustion chamber, a fuel metering unit for controlling the flow of fuel from the fuel pump to the fuel

[ What is claimed is:] [1.] A fuel system for use in an aircraft engine, the fuel system comprising:a fuel pump for pressurizing fuel from a fuel supply, a plurality of fuel nozzles arranged in a combustion chamber, a fuel metering unit for controlling the flow of fuel from the fuel pump to the fuel nozzles,a fuel manifold fluidically connecting the fuel metering unit to the fuel nozzles, andan ecology valve fluidically connected to the fuel manifold, the ecology valve having a reservoir for temporary storage of fuel, and reservoir control means for suctioning sufficient fuel into the reservoir to prevent coking of the nozzles upon engine shutdown for temporary storage and return of the temporarily stored fuel for combustion in the next engine operating cycle.