Patent US3577964A successfully refreshed from Google Patents.
US3577964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Honeywell Inc
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Filing: 1968-04-17
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Granted: 1971-05-11
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Expires: 1988-04-17
Abstract
Abstract A fluidic fuel control system wherein mass fuel flow into a mixing chamber is controlled in response to volumetric flow rate, temperature and pressure of air entering the chamber.
Inventors
- 👤 Jeffrey M Lazar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:56
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0241; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
316 words
Fuel mixing apparatus comprising: a mixing chamber; an air intake passage in communication with said mixing chamber for supplying air thereinto; a fuel nozzle in communication with said mixing chamber for introducing fuel thereinto; air velocity sensing means operable to provide a first fluid signal indicative of the velocity of airflow through said air intake passage; first temperature sensing means operable to provide a second fluid signal indicative of the air-fuel mixture temperature within said mixing chamber; air pressure sensing means operable to provide a third fluid signal continuously indicative of the air pressure within said air intake passage; control means including a plurality of fluid amplifiers, said control means having control port means and signal output means; first means connecting said air velocity sensing means, said first temperature sensing means and said air pressure sensing means to the control port means of saiD control means so as to convey the first, second and third fluid signals thereto, said control means being operable to provide a fourth signal at the signal output means indicative of the mass airflow into said mixing chamber in response to the first, second and third fluid signals; fuel metering means including a control input, a fuel inlet and a fuel outlet, the fuel inlet being adapted to be connected to a source of fuel under pressure, said fuel metering means being operable to control fuel flow between the fuel inlet and the fuel outlet in response to a signal supplied to the control input; second means connecting the signal output means of said control means to the control input of said fuel metering means so as to convey the fourth signal thereto; and third means connecting the fuel outlet of said fuel metering means to said fuel nozzle, said fuel metering means being operable to control fuel flow into said mixing chamber in response to mass airflow into said mixing chamber.
Claim 2
Dependent Claim
316 words
Fuel mixing apparatus comprising: a mixing chamber; an air intake passage in communication with said mixing chamber for supplying air thereinto; a fuel nozzle in communication with said mixing chamber for introducing fuel thereinto; air velocity sensing means operable to provide a first fluid signal indicative of the velocity of airflow through said air intake passage; first temperature sensing means operable to provide a second fluid signal indicative of the air-fuel mixture temperature within said mixing chamber; air pressure sensing means operable to provide a third fluid signal continuously indicative of the air pressure within said air intake passage; control means including a plurality of fluid amplifiers, said control means having control port means and signal output means; first means connecting said air velocity sensing means, said first temperature sensing means and said air pressure sensing means to the control port means of saiD control means so as to convey the first, second and third fluid signals thereto, said control means being operable to provide a fourth signal at the signal output means indicative of the mass airflow into said mixing chamber in response to the first, second and third fluid signals; fuel metering means including a control input, a fuel inlet and a fuel outlet, the fuel inlet being adapted to be connected to a source of fuel under pressure, said fuel metering means being operable to control fuel flow between the fuel inlet and the fuel outlet in response to a signal supplied to the control input; second means connecting the signal output means of said control means to the control input of said fuel metering means so as to convey the fourth signal thereto; and third means connecting the fuel outlet of said fuel metering means to said fuel nozzle, said fuel metering means being operable to control fuel flow into said mixing chamber in response to mass airflow into said mixing chamber.
Claim 3
Dependent Claim
79 words
The fuel mixing apparatus of claim 1 further including fuel temperature sensing means operable to provide a fifth fluid signal indicative of the fuel temperature within sad fuel metering means and means connecting said fuel temperature sensing means to said control means so as to convey the fifth fluid signal thereto, the fourth fluid signal provided by said control means being responsive to mass airflow into said mixing chamber and temperature of the fuel within said fuel metering means.
Claim 4
Dependent Claim
63 words
The fuel mixing apparatus of claim 2 further including fuel pressure responsive means associated with said fuel metering means, said fuel pressure responsive means being operable to control said fuel metering means in response to the fuel pressure thereacross, said fuel metering means being operable to control mass fuel flow into said mixing chamber in response to mass airflow into said mixing chamber.
Claim 5
Dependent Claim
80 words
The fuel mixing apparatus of claim 3 in combination with an internal combustion engine and further including demand sensing means operable to provide a sixth fluid signal indicative of engine acceleration and loading and means connecting said demand sensing means to said control means so as to convey the sixth fluid signal thereto, said fuel metering means being operable to control mass fuel flow into said mixing chamber in response to mass airflow into said mixing chamber and engine demand.
Claim 6
Dependent Claim
270 words
The fuel mixing apparatus of claim 1 wherein: said air velocity sensing means comprises a venturi section in said air intake passage, said venturi section including a throat of smaller cross-sectional area than the cross-sectional area of the remainder of said air intake passage, said venturi section having a first static pressure port upstream from its throat and a second static pressure port at its throat; said air temperature sensing means comprises a first orifice adapted to be supplied with fluid under pressure and a capillary passage adapted to be supplied with fluid under pressure, the capillary passage being located within said air intake passage; said air pressure sensing means comprises a second orifice adapted to be supplied with fluid under pressure, a third orifice adapted to be supplied with fluid under pressure, a fourth orifice in communication with said air intake passage, and means connecting said third and said fourth orifices, last named means including a pressure tap; said control means comprises a cascade of proportional fluid amplifiers, each amplifier having a pair of opposing control ports; and said first means comprises means connecting the first and second static pressure ports of said air velocity sensing means to opposing control ports of an amplifier in said cascade of proportional fluid amplifiers, means connecting the first orifice and the capillary passage of said temperature sensing means to opposing control ports of an amplifier in said cascade of proportional fluid amplifiers and means connecting the second orifice and thE pressure tap of said air pressure sensing means to opposing control ports of an amplifier in said cascade of proportional fluid amplifiers.
Claim 7
Dependent Claim
239 words
A fluidic fuel control system for an internal combustion engine including a combustion chamber, and a fuel nozzle and an air intake passage for supplying fuel and air thereinto comprising: volumetric airflow sensing means operable to provide a first fluid signal indicative of volumetric airflow into the combustion chamber; air pressure sensing means operable to provide a second fluid signal indicative of the pressure of air flowing into the combustion chamber; fluidic summing means; first means connecting said volumetric airflow sensing means and said air pressure sensing means to said summing means so as to convey the first and second fluid signals thereto, said fluidic summing means being operable to produce a third fluid signal indicative of mass airflow into the combustion chamber; fuel metering means including a control input, a fuel inlet and a fuel outlet, the fuel inlet being adapted to be connected to a source of fuel under pressure; second means connecting said fluidic summing means to the control input of said fuel metering means so as to convey the third fluid signal thereto, said fuel metering means being operable to control fuel flow between the fuel inlet and the fuel outlet in response to the third fluid signal; third means connecting the fuel outlet of said fuel metering means to the fuel nozzle; fuel temperature sensing means; and fourth means connecting said fuel temperature sensing means to the control input of said fuel metering means.
Claim 8
Dependent Claim
239 words
A fluidic fuel control system for an internal combustion engine including a combustion chamber, and a fuel nozzle and an air intake passage for supplying fuel and air thereinto comprising: volumetric airflow sensing means operable to provide a first fluid signal indicative of volumetric airflow into the combustion chamber; air pressure sensing means operable to provide a second fluid signal indicative of the pressure of air flowing into the combustion chamber; fluidic summing means; first means connecting said volumetric airflow sensing means and said air pressure sensing means to said summing means so as to convey the first and second fluid signals thereto, said fluidic summing means being operable to produce a third fluid signal indicative of mass airflow into the combustion chamber; fuel metering means including a control input, a fuel inlet and a fuel outlet, the fuel inlet being adapted to be connected to a source of fuel under pressure; second means connecting said fluidic summing means to the control input of said fuel metering means so as to convey the third fluid signal thereto, said fuel metering means being operable to control fuel flow between the fuel inlet and the fuel outlet in response to the third fluid signal; third means connecting the fuel outlet of said fuel metering means to the fuel nozzle; fuel temperature sensing means; and fourth means connecting said fuel temperature sensing means to the control input of said fuel metering means.
Claim 9
Dependent Claim
74 words
The fluidic fuel control system of claim 6 further including first temperature sensing means operable to provide a fourth fluid signal indicative of a temperature of air fuel flowing into the combustion chamber and fourth means connecting said first temperature sensing means to said fluidic summing means so as to convey the fourth fluid signal thereto, said third fluid signal produced by said summing means further being a function of the fourth fluid signal.
Claim 10
Dependent Claim
60 words
The fluidic fuel control system of claim 7 further including fuel pressure responsive means associated with said fuel metering means, said fuel pressure responsive means being operable to control said fuel metering means in response to fuel pressure thereacross, said fuel metering means being operable to control mass fuel flow into the combustion chamber in response to mass airflow thereinto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |