US3771504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic fuel injection device having air modulation
Assignee: United States Department of the Army
•
Filing: 1972-05-15
•
Granted: 1973-11-13
•
Expires: 1992-05-15
Abstract
Abstract Means for regulating the air-fuel mixture ratio in a fuel delivery system. The present invention departs from other known fuel delivery systems in that the air flow is scheduled as a function of the operator''s selected fuel flow. In conventional systems the fuel flow is scheduled as a function of the operator''s selected air flow. Fluidic technology is utilized in a preferred embodiment for the sensing, computation, and actuation of the required variables.
Inventors
- 👤 R Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:01
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; G; G06; G06G; G06G5/00; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
Apparatus for regulating the air fuel mixture ratios in a fuel delivery system or an internal combustion engine, comprising: a. Means for selecting a fuel flow rate to said engine, said selecting means under the direct control of the operator of said engine; b. means for scheduling the desired air flow rate as a function of said fuel flow rate; c. means for comparing said desired air flow rate with the actual air flow rate and for issuing the first signal indicative of the difference therebetween; and d. means for adjusting said actual air flow rate in response to said signal to correspond to said desired air flow rate.
Claim 2
Dependent Claim
109 words
Apparatus for regulating the air fuel mixture ratios in a fuel delivery system or an internal combustion engine, comprising: a. Means for selecting a fuel flow rate to said engine, said selecting means under the direct control of the operator of said engine; b. means for scheduling the desired air flow rate as a function of said fuel flow rate; c. means for comparing said desired air flow rate with the actual air flow rate and for issuing the first signal indicative of the difference therebetween; and d. means for adjusting said actual air flow rate in response to said signal to correspond to said desired air flow rate.
Claim 3
Dependent Claim
18 words
The invention according to claim 1 wherein said scheduling means and said comparing means have no moving parts.
Claim 4
Dependent Claim
24 words
The invention according to claim 2 wherein said scheduling means comprise a fluidic amplifier whose input-output characteristics correspond to the desired air-fuel mixture ratio.
Claim 5
Dependent Claim
19 words
The invention according to calim 3 further comprising means for mixing said fuel flow with said desired air flow.
Claim 6
Dependent Claim
19 words
The invention according to calim 3 further comprising means for mixing said fuel flow with said desired air flow.
Claim 7
Dependent Claim
48 words
The invention according to claim 4 wherein said mixing means comprises a. means for measuring the actual air flow rate to said engine and for delivering a second signal indicative thereof to said comparing means and b. a throttle for controlling the air flow rate to said engine.
Claim 8
Dependent Claim
15 words
The invention According to claim 5 wherein said comparing means comprises a fluidic summing amplifier.
Claim 9
Dependent Claim
21 words
The invention according to claim 6 wherein said adjusting means comprises a fluid power actuator that is connected to said throttle.
Claim 10
Dependent Claim
25 words
The invention according to claim 7 wherein said selecting means comprises a variable fluid resitrictor that provide a continuous flow of fuel to said engine.
Claim 11
Dependent Claim
21 words
The invention according to claim 7 wherein said selecting means comprises means for generating a pulsed fuel signal to said engine.
References Cited (Backward Citations)
US2330650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |