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Publication Title | United States Patent- [191 White ELECI'RICALLYDRIVENFUELPUMPFOR GAS TURBINE ENGINES

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Text | United States Patent- [191 White ELECI'RICALLYDRIVENFUELPUMPFOR GAS TURBINE ENGINES | 001



United States Patent- [191 White

[54] ELECI'RICALLYDRIVENFUELPUMPFOR GAS TURBINE ENGINES

[75] Inventor: Robert0.White,LaMesa,Calif.

_ .

[73] Assrgnee: SundstrandCorporation,Rockford,

[1] PatentNumber: 4,815,278 [45] DateofPatent: Mar.28,1989

4,208,871 6/1980 Riple..60/39.281 4,697,238 9/1987 Barbeau ................60/39.281

PrimaryExaminer-LouisJ-casaregola Attorney,Agent,orFirm-Antonelh,Terry& Wands

[57] ABSTRACT

An improvedelectricallydrivenfuelcontrolsystemfor a gas turbine engine is disclosed. The system utilizes a

combination of variation in power applied to an electri

cally powered drive of a positive displacement fuel

pump and braking to achieve an optimized response

characteristic approaching that of mechanically driven

fuel systems directly driven from the gas turbine engine.

In the preferred embodiment, for a decrease in fuel

deliveryexceedingapredeterminedlimitcontrolofthe

electricdriveforthefuelpump isachievedbybraking. Fordecreasesinfueldeliveryhavingamagnitudeless

than the predetermined limit and for fuel increases,

_

[21] [22] [51] [52] [58]

[56]

m_

_ A'ppl'No" 108,439

Fded: Oct. 14, 1937

Int Cl4

Us. 447/42 Fi'elh0t: ' '"66/39281,413/22 42

""""""""" ' ’ ReferencesCited

U_s_PATENT DOCUMENTS

F02C 9/30 ’

2,644,300 7/1953 Watermaneta1 gvery """"""""

60/39-281

3,620,01011/197113:31?

3,908,360 9/1975 Meyereta1

3,985,468 10/1976 Lewis .........

4,004,412 1/1977 Burnell.60/39.281 12Claims,7DrawingSheets

runno!0510Sm

II:60/39:28l c°mr°lisachievedbyvaryingtheP°Werapplied‘0the .60/39.28l elect“drlveforthefuelPump

..... 417/214

FUELDEMANDSIGNAL

Image | United States Patent- [191 White ELECI'RICALLYDRIVENFUELPUMPFOR GAS TURBINE ENGINES



united-states-patent--[191-white--eleciricallydrivenfuelpumpfor-gas-turbine-engines
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