Patent ID: 7565793
Filing Date: 2009-07-28
Classification: F02C,Y02T,Y10T

Abstract:
1. A fuel control system for a gas turbine engine, the fuel control system comprising: a main fuel inlet line; an auxiliary fuel inlet line; an engine fuel outlet line; a first flow path from said main fuel inlet line to said engine fuel outlet line; a second flow path from said auxiliary fuel inlet line to said engine fuel outlet line; a check valve in said first flow path allowing fuel flow through the first flow path in a direction from the main fuel inlet line to the engine fuel outlet line and substantially preventing fuel flow through the first flow path in a direction from the engine fuel outlet line to the main fuel inlet line, said check valve being shiftable between a first position connecting said auxiliary fuel inlet line to said engine fuel outlet line and a second position blocking said second flow path; an auxiliary fuel bypass line bypassing said check valve and connected to said auxiliary fuel inlet line; and a control valve selectively connecting said auxiliary fuel inlet line to said engine fuel outlet line via said auxiliary fuel bypass line.