Fuel-injection device in a turbomachine
AssigneeHispano Suiza
InventorsFrederic BRETTES, Jean Charles Cappellari, Laurent Gilbert Yves Hodinot, Sandrine Huet
Life of this patent
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Abstract
A fuel-injection device in a turbomachine, comprising a high-pressure pump (10) supplying a flow control valve (16), whose outlet is connected via a pressurization and cut-off valve (20) to a fuel-injector (18) feed pipe (22), the valve (20) being connected to the inlet and to the outlet of the pump (10) in order to define two fuel pressurization thresholds, one being used to start-up and restart the turbomachine, and the other being used for operating the turbomachine as from an idle speed and for commanding an equipment with variable geometry (24).
Claims9
A fuel injection device in a turbomachine, comprising at least one pump connecting a fuel tank to flow rate control means supplying fuel injectors through the intermediary of a pressurization and cut-off valve, such valve comprising a piston that can be moved inside a cylindrical body between a closed position and an open position for feeding the injectors, the piston being sensitive to the pressurization of the fuel for closing the injector supply as long as such pressurization is lower than a first predetermined threshold, the pressurization and cut-off valve comprising means for applying a counter-pressure on the piston, as from the idle speed of the turbomachine, thereby creating a second pressurization threshold, such second threshold exceeding the first threshold and a minimal value for controlling equipment with variable geometry of the turbomachine.
Dependencies are inferred from the claim text.