Hispano Suiza

Laurent Hodinot

Henry Roger Leclerc

Claude M Maillard

David Maillard

Sylvain Poitout

A fuel metering unit in a turbomachine is connected between a high pressure pump which draws fuel from a fuel tank and a plurality of fuel injectors disposed in a combustion chamber of the turbomachine, the unit comprises a meter which receives the fuel for injection from a regulator valve at a pressure Pand delivers it at a pressure Pto said plurality of injectors via a stop valve, said regulator valve serving to recirculate fuel back to said high pressure pump as a function of the pressure difference between pressures taken directly from the terminals of the meter and injected into two end inlets of the regulator valve.

Fuel metering unit with a compensated regulator valve in a turbomachine

In a turbomachine, there is provided a fuel metering unit having a cylindrical outer sleeve containing a distributor cylinder in which a metering piston can be moved linearly under the action of a control element. The cylindrical sleeve has an inlet orifice for admitting fuel under pressure and at least one outlet orifice for injecting fuel into a combustion chamber of the turbomachine, and the metering piston has an annular gap forming a distribution chamber for the fuel admitted via the inlet orifice and delivered via at least one outlet orifice. According to the invention, the distributor cylinder has a plurality of radial feed orifices for admitting fuel into the distribution chamber and at least a first metering orifice and at least a second metering orifice that are separated by a seal disposed at the periphery of the distributor cylinder.

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Cesson, France

Laurent Hodinot