Patent ID: 6751942
Filing Date: 2004-06-22
Classification: F02C,F05D

Abstract:
A system for delivering fuel from a fuel source to a gas turbine engine combustor, comprising:a fuel supply line having an inlet coupled to the fuel source and an outlet coupled to the combustor; a metering valve positioned in flow-series in the supply line; a bypass flow line coupled between an inlet of the metering valve and the fuel supply line inlet for bypassing a portion of the fuel in the supply line back to the inlet; a bypass valve positioned in flow-series in the bypass flow line; and a controller operable to determine whether the metering valve is controllable or non-controllable and configured, in response thereto, to (i) adjust the metering valve to control fuel flow to the combustor when the metering valve is determined to be controllable and (ii) adjust the bypass valve to-control fuel flow to the combustor when the metering valve is determined to be non-controllable.