Patent ID: 8046983
Filing Date: 2011-11-01
Classification: F02C

Abstract:
1. An ecology valve (EV) fuel return system utilized in conjunction with fuel supply system and a gas turbine engine (GTE) including at least a first fuel manifold, the EV fuel return system comprising: a housing assembly having a fuel return outlet and a first manifold inlet fluidly coupled to the fuel supply system and to the first fuel manifold, respectively; an ecology valve disposed in the housing assembly and fluidly coupled between the fuel return outlet and the first manifold inlet; and a fuel routing assembly fluidly coupled between the fuel return outlet, the first manifold inlet, and the ecology valve, the fuel routing assembly routing 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mode, and (ii) from the ecology valve, through the fuel return outlet, and to the fuel supply system to return the fuel withdrawn from the first fuel manifold to the fuel supply system when the GTE is in an engine start mode.