Patent ID: 7007452
Filing Date: 2006-03-07
Classification: F02C

Abstract:
1. A system for transferring fuel from at least one engine fuel manifold of a gas turbine engine to a fuel tank comprising: a fuel metering and shutoff valve configured to provide high pressure fuel to the at least one engine fuel manifold; a bypass valve in fluid communication with the fuel metering and shutoff valve; an ejector having an inlet port for receiving fuel from the bypass valve during engine operation, an outlet port in fluid communication with one of the fuel tank and a fuel tank ejector, and a suction port, the ejector defining a nozzle extending between the inlet port and the outlet port for increasing the velocity of high pressure fuel flowing therethrough so as to create suction at the suction port; a checkvalve in fluid communication with a drain port of a manifold drain valve and one of the suction port and the inlet port, the manifold drain valve having an inlet port in fluid communication with an output port of the fuel metering and shut off valve, at least one manifold port in fluid communication with the at least one engine fuel manifold, a port connected to the checkvalve, and the drain port, the manifold drain valve configured to connect the at least one manifold port to the high pressure fuel during engine operation and to the drain port when the metering valve and shutoff valve inlet port is switched to low pressure.