Patent US3722218A successfully refreshed from Google Patents.
US3722218A
Expired / Lapsed
US
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Air boost fuel atomizing system
Assignee: Parker Hannifin Corp
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Filing: 1970-12-04
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Granted: 1973-03-27
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Expires: 1990-12-04
Abstract
Abstract An air boost fuel atomizing system for a gas turbine engine or the like operative to supply compressed air to atomizing fuel injection nozzles during starting of the engine until the engine compressor discharge pressure exceeds the combustion chamber pressure by a prescribed amount such as to obtain efficient atomization and combustion of the fuel on compressor air alone, and when that occurs at say, 80 percent of the maximum turbine shaft speed which may vary from engine to engine, the air boost fuel atomizing system is de-energized. In one system according to this invention, the boost blower or compressor is in series between the engine compressor and the fuel-air manifold so as to deliver to the latter increased air pressure as required during starting of the engine and until the engine attains a predetermined speed, after which the engine compressor discharge pressure is itself sufficient to sustain efficient atomization and combustion. In another system according to the present invention, the boost compressor has an atmospheric intake port and a discharge port communicating with a high pressure air reservoir from which air is conducted to the fuel-air manifold via a pressure regulator during starting of the engine and until the engine compressor air is of sufficient magnitude to sustain efficient atomization and combustion at which time the air boost system is de-energized.
Inventors
- 👤 D Lapera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:56
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22; F02C7/236; F02C7/2365
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
199 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor operative to supply increased air pressure to said nozzles during starting of said engine; valve means operative in response to increase of engine compressor discharge pressure to a predetermined value to open communication between said engine compressor and said nozzles and to close communication between said boost compressor and said nozzles for continued operation of said engine with engine compressor air; and pressure switch means in the air supply line between said valve means and said engine compressor operative to energize said valve means to close communication between said engine compressor and said nozzles and to open communication between said boost compressor and said nozzles whereby increased air pressure is supplied to said nozzles during the starting period of the engine until said pressure switch means is actuated by increased engine compressor discharge pressure reaching such predetermined value at which time said valve means is de-energized for continued operation of said engine with engine compressor air.
Claim 2
Dependent Claim
199 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor operative to supply increased air pressure to said nozzles during starting of said engine; valve means operative in response to increase of engine compressor discharge pressure to a predetermined value to open communication between said engine compressor and said nozzles and to close communication between said boost compressor and said nozzles for continued operation of said engine with engine compressor air; and pressure switch means in the air supply line between said valve means and said engine compressor operative to energize said valve means to close communication between said engine compressor and said nozzles and to open communication between said boost compressor and said nozzles whereby increased air pressure is supplied to said nozzles during the starting period of the engine until said pressure switch means is actuated by increased engine compressor discharge pressure reaching such predetermined value at which time said valve means is de-energized for continued operation of said engine with engine compressor air.
Claim 3
Dependent Claim
30 words
The system of claim 1 wherein the outlet of said boost compressor is communicated with an air pressure reservoir having an outlet communicated with said nozzles via said valve means.
Claim 4
Dependent Claim
49 words
The system of claim 1 wherein said valve means opens and closes communication between said engine compressor and Said manifold and closes and opens communication between said manifold and said boost compressor responsive to engine compressor discharge pressure being of such predetermined magnitude or less than such predetermined magnitude.
Claim 5
Dependent Claim
29 words
The system of claim 2 wherein a differential pressure regulator downstream of said reservoir regulates the increased air pressure supplied to said nozzles over a predetermined air pressure schedule.
Claim 6
Dependent Claim
32 words
The system of claim 2 wherein said reservoir has pressure switch means associated therewith operative to de-energize said boost compressor whenever the pressure built up in said reservoir attains a predetermined value.
Claim 7
Dependent Claim
160 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to a fuel-air manifold including air atomizing fuel nozzles disposed in the combustion chamber of said engine; said system comprising a boost compressor operative to supply increased air pressure to said manifold during the starting period of said engine and until the engine reaches an operating speed whereat the engine compressor discharge pressure is of predetermined magnitude; and means responsive to increased engine compressor discharge pressure at such operating speed to communicate said manifold with said engine compressor; said last-named means comprising solenoid operated valve means to open and close communication between said engine compressor and said manifold and to close and to open communication between said manifold and said boost compressor; said valve means, when energized, closing communication between said manifold and said engine compressor and opening communication between said manifold and said boost compressor.
Claim 8
Dependent Claim
160 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to a fuel-air manifold including air atomizing fuel nozzles disposed in the combustion chamber of said engine; said system comprising a boost compressor operative to supply increased air pressure to said manifold during the starting period of said engine and until the engine reaches an operating speed whereat the engine compressor discharge pressure is of predetermined magnitude; and means responsive to increased engine compressor discharge pressure at such operating speed to communicate said manifold with said engine compressor; said last-named means comprising solenoid operated valve means to open and close communication between said engine compressor and said manifold and to close and to open communication between said manifold and said boost compressor; said valve means, when energized, closing communication between said manifold and said engine compressor and opening communication between said manifold and said boost compressor.
Claim 9
Dependent Claim
54 words
The system of claim 6 wherein a pressure switch responsive to engine compressor discharge pressure is operative to de-energize said valve means to open communication between said manifold and said engine compressor and to close communication between said manifold and said boost compressor when the engine compressor discharge pressure increases to such predetermined value.
Claim 10
Dependent Claim
23 words
The system of claim 7 wherein said pressure switch means also de-energizes said boost compressor when said valve means is de-energized as aforesaid.
Claim 11
Dependent Claim
188 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor and drive means therefor operative to supply increased air pressure to said nozzles during starting of said engine; and means responsive to increase of engine compressor discharge pressure to a predetermined value to deenergize said boost compressor drive means for continued operation of said engine with engine compressor air; and valve means in the air supply line between said engine compressor and said nozzles operative to communicate the boost compressor intake with said engine compressor supply line and the boost compressor outlet with said nozzles to place said boost compressor in series with said engine compressor thus to boost the air pressure supplied to said nozzles; said valve means being actuatable to a position to communicate the air supply line from said engine compressor with said nozzles; said means responsive to engine compressor discharge pressure effecting actuation of said valve means to the last-mentioned position.
Claim 12
Dependent Claim
188 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor and drive means therefor operative to supply increased air pressure to said nozzles during starting of said engine; and means responsive to increase of engine compressor discharge pressure to a predetermined value to deenergize said boost compressor drive means for continued operation of said engine with engine compressor air; and valve means in the air supply line between said engine compressor and said nozzles operative to communicate the boost compressor intake with said engine compressor supply line and the boost compressor outlet with said nozzles to place said boost compressor in series with said engine compressor thus to boost the air pressure supplied to said nozzles; said valve means being actuatable to a position to communicate the air supply line from said engine compressor with said nozzles; said means responsive to engine compressor discharge pressure effecting actuation of said valve means to the last-mentioned position.
Claim 13
Dependent Claim
149 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor and drive means therefor operative to supply increased air pressure to said nozzles during starting of said engine; solenoid operated valve means in the air supply line leading to said nozzles operative in one position to communicate the boost compressor outlet with said nozzlEs and in another position to communicate said engine compressor with said nozzles; and pressure switch means responsive to increase of engine compressor discharge pressure to a predetermined value at a predetermined engine speed to de-energize said boost compressor drive means and said valve means to actuate the latter to said another position for continued operation of said engine with engine compressor air.
Claim 14
Dependent Claim
149 words
An air boost fuel atomizing system for a gas turbine engine of the type having an engine driven compressor to supply air under pressure to air atomizing fuel nozzles disposed in the combustion chamber of said engine, said system comprising a boost compressor and drive means therefor operative to supply increased air pressure to said nozzles during starting of said engine; solenoid operated valve means in the air supply line leading to said nozzles operative in one position to communicate the boost compressor outlet with said nozzlEs and in another position to communicate said engine compressor with said nozzles; and pressure switch means responsive to increase of engine compressor discharge pressure to a predetermined value at a predetermined engine speed to de-energize said boost compressor drive means and said valve means to actuate the latter to said another position for continued operation of said engine with engine compressor air.
References Cited (Backward Citations)
US2472802A
Cited
US2996882A
Cited
US3048014A
Cited
US2813231A
Cited
US2941790A
Cited
US3095707A
Cited
US3426527A
Cited
US3581493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |