Gas turbine engine fuel control system

摘要

A gas turbine engine fuel control system (100) is provided that includes a fuel metering valve (108) and a thrust control valve (114). The fuel metering valve (108) includes a metering valve inlet (107) and a metering valve outlet (109). The metering valve inlet (107) is adapted to receive a flow of fuel, and is configured to control the flow of fuel through the metering valve outlet (109). The thrust control valve (114) is adapted to receive thrust control valve override signals and is configured, in response thereto, to move from a first position, in which flow from the metering valve is not impacted, and a second position, in which flow from the metering valve is blocked while flow through a fixed-area orifice is allowed.