US3865907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle valve vapor injection and method
Assignee: Individual
•
Filing: 1973-10-09
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Granted: 1975-02-11
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Expires: 1993-10-09
Abstract
Abstract A needle valve vapor injection system for use in connection with the idle port of a carburetor, said injection system causing vaporization of a liquid comprising water using influent air and thereafter loading a charge of the resulting vapor into a cylinder under force of a vacuum-driven piston. The vapor charge is discharged from the cylinder by the piston when the vacuum pressure is low, passing through the needle valve and issuing with atomized fuel into the carburetor barrel to alleviate NOX. The needle valve has an unobstructed passage extending axially completely through the needle valve to permit movement of said vapor charge during low vacuum at the intake manifold movement of air at atmospheric pressure through said passage into the barrel during normal vacuum.
Inventors
- 👤 Howard P Rock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:18
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; F02M23/09; F02M23/095; F02M25/00; F02M25/022; F02M25/0221; F02M25/0225; F02M25/025; F02M25/028; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
In combination: a carburetor having a barrel communicating with an intake manifold and a fuel passage and idle port communicating fuel to the barrel, said port being in the wall of the carburetor; a threaded bore of greater diameter than the port axially aligned with the port, the threaded bore spanning between the port and the exterior of said carburetor; a threaded needle valve adjustably received in said threaded bore and comprising a distal end portion seatable against said wall around said port to close said port, and external means at or near the exposed proximal end of the needle valve for adjusting the spacing of said distal end from the wall, said needle valve further comprising a central axial passageway through the entire needle; means delivering a charge of vapor comprising water through the axial passageway of the needle valve into the carburetor at predetermined engine conditions.
Claim 2
Dependent Claim
148 words
In combination: a carburetor having a barrel communicating with an intake manifold and a fuel passage and idle port communicating fuel to the barrel, said port being in the wall of the carburetor; a threaded bore of greater diameter than the port axially aligned with the port, the threaded bore spanning between the port and the exterior of said carburetor; a threaded needle valve adjustably received in said threaded bore and comprising a distal end portion seatable against said wall around said port to close said port, and external means at or near the exposed proximal end of the needle valve for adjusting the spacing of said distal end from the wall, said needle valve further comprising a central axial passageway through the entire needle; means delivering a charge of vapor comprising water through the axial passageway of the needle valve into the carburetor at predetermined engine conditions.
Claim 3
Dependent Claim
84 words
The combination of claim 1 wherein said means for delivering the charge of vapor comprises: means initially creating vapor by bubbling air through liquid; two way vapor displacing means; means selectively communicating vapor from said creating means via the displacing means through the passageway of the needle valve; means interposed between the displacing means and the engine whereby low vacuum pressure at the engine causes said displacing means to express a charge of vapor into the carburetor via the passageway of the needle valve.
Claim 4
Dependent Claim
56 words
The combination of claim 2 wherein the creating means comprise: a container with liquid therein and a space above the liquid; air delivery means interposed between the air cleaner of the engine and the container, the effluent end of the air delivery means being submerged within the liquid whereby air bubbles vaporize liquid into said space.
Claim 5
Dependent Claim
134 words
The combination of claim 2 wherein the displacing means comprise vapor influent conduit means, vapor effluent conduit means and accumulator means interposed between said two conduit means, said accumulator means comprising a vapor storage chamber and a piston reciprocably disposed within the chamber, said accumulator means further comprising means communicating vacuum pressure from the engine to one side of the piston and bias means applying force to the piston counter to said vacuum force, said bias force being of a magnitude intermediate the extremes of said vacuum pressure whereby a charge of vapor is loaded into the chamber by piston displacement in one direction while vacuum pressure is relatively high and a loaded charge of vapor is expressed from the chamber by piston displacement in the opposite direction while vacuum pressure is relatively low.
Claim 6
Dependent Claim
37 words
The combination of claim 2 wherein said interposed means comprise dual check valve means communicating air througH the dual check valve means and the passageway of the needle valve during high vacuum and vapor during low vacuum.
Claim 7
Dependent Claim
49 words
The combination of claim 1 wherein the delivering means comprise means selectively displacing vapor to and through the passageway of the needle valve and means communicating engine vacuum pressure, the magnitude of which varies, to the selectively displacing means causing said vapor displacement to occur at low vacuum only.
Claim 8
Independent Claim
105 words
A method of alleviating NOX discharge from an intermal combustion engine, comprising the steps of: providing a source of vapor comprising water; displacing a charge of vapor from said source to storage responsive to engine suction of a relatively high magnitude; storing said vapor charge so long as said engine suction is high and at the same interval of time introducing air through a needle valve into the interior of the carburetor to atomize fuel; issuing said vapor charge from storage through the needle valve and into the interior of the carburetor responsive to engine suction of a relatively low magnitude occurring during engine acceleration.
Claim 9
Independent Claim
105 words
A method of alleviating NOX discharge from an intermal combustion engine, comprising the steps of: providing a source of vapor comprising water; displacing a charge of vapor from said source to storage responsive to engine suction of a relatively high magnitude; storing said vapor charge so long as said engine suction is high and at the same interval of time introducing air through a needle valve into the interior of the carburetor to atomize fuel; issuing said vapor charge from storage through the needle valve and into the interior of the carburetor responsive to engine suction of a relatively low magnitude occurring during engine acceleration.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |