US4520763A
Expired / Lapsed
US
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Fuel injection system
Assignee: Ergenics Corp
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Filing: 1984-06-06
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Granted: 1985-06-04
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Expires: 2004-06-06
Abstract
Abstract Discloses a fuel injection system for the timed introduction of a gaseous fuel such as hydrogen gas into a combustion volume of an internal combustion engine. The system comprises (a) a chamber of fixed volume into which, at one time, gas flows from a fuel source and out of which, at another time, gas flows to a combustion volume of an internal combustion engine and (b) means for varying the pressure of the gas flowing to the chamber.
Inventors
- 👤 Franklin E. Lynch
- 👤 Nathaniel R. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:34
CPC Classifications
F; F02; F02M; F02M21/00; F02M21/02; F02M21/0203; F02M21/0206; F02D; F02D19/00; F02D19/02; F02D19/021; F02D19/023; F02B; F02B1/00; F02B1/02; F02B1/04; F02M21/0218; F02M21/0221; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30; Y10; Y10S; Y10S123/00; Y10S123/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
156 words
A fuel injection system for an internal combustion engine coupleable to a source of gaseous hydrogen comprising a means for controlling pressure, a means to selectively vary said pressure control means, a chamber into which hydrogen gas of regulated pressure can flow from said pressure control means, conduit means between said pressure control means and said chamber and a combustion volume of said internal combustion engine and means, timed to said internal combustion engine, whereby during a fuel intake event of said combustion volume of said engine flow of hydrogen from said chamber to a combustion volume of said engine is permitted and from said pressure control means to said chamber is prohibited and whereby the absence of a fuel intake event of said combustion volume of said engine, flow of hydrogen is permitted from said pressure control means to said chamber and prohibited from said chamber to said combustion volume of said internal combustion engine.
Claim 2
Dependent Claim
156 words
A fuel injection system for an internal combustion engine coupleable to a source of gaseous hydrogen comprising a means for controlling pressure, a means to selectively vary said pressure control means, a chamber into which hydrogen gas of regulated pressure can flow from said pressure control means, conduit means between said pressure control means and said chamber and a combustion volume of said internal combustion engine and means, timed to said internal combustion engine, whereby during a fuel intake event of said combustion volume of said engine flow of hydrogen from said chamber to a combustion volume of said engine is permitted and from said pressure control means to said chamber is prohibited and whereby the absence of a fuel intake event of said combustion volume of said engine, flow of hydrogen is permitted from said pressure control means to said chamber and prohibited from said chamber to said combustion volume of said internal combustion engine.
Claim 3
Dependent Claim
17 words
A fuel injection system as in claim 1 wherein said means for controlling pressure is a regulator.
Claim 4
Dependent Claim
18 words
A fuel injection system as in claim 1 wherein said means for controlling pressure is a variable valve.
Claim 5
Dependent Claim
15 words
A fuel injection system as in claim 1 coupleable to a hydride hydrogen storage means.
Claim 6
Dependent Claim
18 words
A fuel injection system as in claim 1 wherein said chamber includes means for varying the volume thereof.
Claim 7
Dependent Claim
21 words
A fuel injection system as in claim 5 wherein said means for varying the volume of said chamber comprises a piston.
Claim 8
Dependent Claim
18 words
A fuel injection system as in claim 1 wherein the internal combustion engine is an Otto cycle engine.
Claim 9
Dependent Claim
55 words
A fuel injection system as in claim 7 which includes a pressure sensing means in said system downstream from said means for controlling pressure coupled to a means for controlling the spark timing of said Otto cycle engine to thereby advance said timing when pressure is low and retard said timing when pressure is high.
Claim 10
Dependent Claim
31 words
A fuel injection system as in claim 7 so constructed and arranged that its fuel-air equivalence ratio in a combustion volume of said Otto cycle engine is less than about 0.7.
Claim 11
Dependent Claim
23 words
A fuel injection system as in claim 9 wherein the fuel-air volume ratio is in the range of about 0.07 to about 0.30.
Claim 12
Dependent Claim
18 words
A fuel injection system as in claim 7 wherein said Otto cycle engine is of a piston-cylinder design.
Claim 13
Dependent Claim
38 words
A fuel injection system as in claim 11 wherein conduit means between said chamber and the cylinder of said Otto cycle engine terminates in an air feed line as close to an air intake valve as is practical.
Claim 14
Dependent Claim
37 words
A fuel injection system as in claim 12 wherein said conduit means between said chamber and said cylinder comprises essentially a valved port on said chamber opening onto the air feed line of said Otto cycle engine.
Claim 15
Dependent Claim
28 words
A fuel injection system as in claim 1 coupleable to a source of low pressure hydrogen wherein said chamber comprises the displacement volume of a positive displacement-type compressor.
Claim 16
Dependent Claim
32 words
A fuel injection system as in claim 1 wherein said means, timed to said internal combustion engine comprises ganged rotary valves mechanically linked to a mechanical output of said internal combustion engine.
Claim 17
Dependent Claim
37 words
A fuel injection system as in claim 1 wherein said means, timed to said internal combustion engine comprises valves of a positive displacement-type compressor driven by mechanical linkage from the mechanical output of said internal combustion engine.
Claim 18
Dependent Claim
24 words
A fuel injection system as in claim 2 wherein said means to selectively vary said regulator comprises a linkage to a pedal speed control.
Claim 19
Dependent Claim
30 words
A fuel injection system as in claim 2 wherein said means to selectively vary said regulator comprise feedback means responsive to load or speed sensing of said internal combustion engine.
Claim 20
Dependent Claim
20 words
A fuel injection system as in claim 17 wherein said linkage to a pedal speed control is a mechanical linkage.
Claim 21
Dependent Claim
24 words
A fuel injection system as in claim 1 wherein said internal combustion engine is a modified diesel cycle engine fitted with an ignition device.
Claim 22
Dependent Claim
38 words
A fuel injection system as in claim 20 coupleable to a source of hydrogen at a pressure significantly greater than the internal pressure of air in said combustion volume of said diesel cycle engine prior to fuel injection.
Claim 23
Dependent Claim
21 words
A fuel injection system as in claim 20 which includes compressor means to raise the pressure of hydrogen to injection pressure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |