Ecology valve fuel return system for gas turbine engine

Details Ecology valve fuel return system for gas turbine engine Ecology valve fuel return system for gas turbine engine

2008-11-05

2011-11-01

Casaregola, Louis (Department: 3741)

Power plants

Combustion products used as motive fluid

With safety device

C060S734000

Reexamination Certificate

active

08046983

ABSTRACT:
An ecology valve (EV) fuel return system is provided. In one embodiment, the EV fuel return system includes a housing assembly having a fuel return outlet and a first manifold inlet. The fuel return outlet is fluidly coupled to a fuel supply system, and the first manifold inlet is fluidly coupled to a first manifold of a gas turbine engine (GTE). An ecology valve is disposed in the housing assembly and fluidly coupled to the fuel return outlet and to the first manifold inlet. A fuel routing assembly is fluidly coupled between the first manifold inlet, the fuel return outlet, and the ecology valve. The fuel routing assembly routes fuel: (i) from the first manifold inlet to the ecology valve when the GTE is in a shut-down mode, and (ii) from the ecology valve to the fuel return outlet when the GTE is in an engine start mode.

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