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US 9,121,349 B2Granted
Fuel system
AssigneeRolls-Royce Controls and Data Services Limited
InventorsMichael Griffiths, Jonathan David Pye
Life of this patent
Estimating the term…
Abstract
A fuel system comprises a supply unit operable to deliver a metered supply of fuel to a supply manifold, a staging valve operable to control the supply of fuel from the supply manifold to a pilot outlet and a main outlet, and control means operable to control the operation of the staging valve to control whether fuel is delivered through the pilot and/or main outlet thereof.
Claims10
A fuel system comprising:
- a supply unit configured to deliver a metered supply of fuel to a supply manifold;
- a plurality of staging valves, each configured to control the supply of fuel from the supply manifold to a respective pilot injector or pilot injector part of a combined injector via a pilot outlet and a respective main injector or main injector part of a combined injector via a main outlet;
- and
- a control means configured to control the operation of the plurality of staging valves to control whether fuel is delivered through the pilot and/or main outlet thereof and wherein the control means comprises a control unit configured to control a pressure difference between the fuel pressure within a control manifold and that within the supply manifold, the plurality staging valves being configured to respond to the said pressure difference.
1 more element
A fuel system comprising:
- a supply unit configured to deliver a metered supply of fuel to a supply manifold;
- a plurality of staging valves, each configured to control the supply of fuel from the supply manifold to a respective pilot outlet and a respective main outlet, at least one of the staging valves is designed in such a manner that there is constant communication between the respective pilot outlet and the supply manifold and another of the staging valves is designed in such a manner that communication between the supply manifold and the respective pilot outlet can be significantly restricted, and
- a control means configured to control the operation of the plurality of staging valves to control whether fuel is delivered through the pilot outlet and/or main outlet thereof.
Dependencies are inferred from the claim text.