US3877449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure carburetor system for manifold distribution
Assignee: Individual
•
Filing: 1973-06-14
•
Granted: 1975-04-15
•
Expires: 1993-06-14
Abstract
Abstract A charge forming system for an internal combustion engine in which a pressure carburetor incorporates a centrally located vertically disposed cylindrical mixing chamber, disposed immediately upstream of the intake manifold inlet and opening directly thereto. The chamber is defined by a cylindrical air valve which has a plurality of annularly spaced air inlet ports formed in the cylinder wall registering with corresponding tangential air inlet ducts formed in the carburetor housing for tangentially introducing air into the air valve. The air valve may be rotated about a vertical axis to vary the amount of registration between the inlet ports formed in the valve and the inlet ducts, thereby varying the amount of air introduced into the mixing chamber or, as shown in another modification, the air valve consisting of a simple cylinder may be vertically shifted within the peripheral housing to vary the opening of the inlet ducts over the upper end of the valve. In a third preferred embodiment, the cylindrical air valve is replaced by one or more butterfly valves situated in one or more air inlet passages, which are formed to tangentially introduce air into the mixing chamber. A downwardly directed fuel nozzle is disposed at the top or closed end of the mixing chamber for spraying a metered supply of atomized fuel axially therein, whereby the spray is mixed with the air before it is inducted into the intake manifold.
Inventors
- 👤 Carl F High
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:33
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/16; F02M69/18; F02M69/24; F02M25/00; F02M29/00; F02M29/04; F02M29/06; F02M3/00; F02M3/06; F02M3/062; F02M9/00; F02M9/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
220 words
In an internal combustion engine having an intake manifold adapted to distribute a fuel-air mixture to engine cylinders, a fuel-air charge forming system comprising: a carburetor housing having a mixing chamber defined by a cylindrical recess open at one end for communication at all times openly and directly with said intake manifold and closed at the opposite end, a liquid fuel nozzle carried at said closed end substantially at the chamber axis and adapted to inject an atomized fuel spray substantially axially into said chamber toward said open end, means for regulating fuel flow to said nozzle, at least one air intake passage in said housing directing air to an intake port opening into the side of said mixing chamber, valve means disposed within said housing adjacent said mixing chamber and operable upon actuation to regulate air flow into said mixing chamber, means connecting said fuel flow regulating means and said valve means to increase air flow into said chamber as fuel flow increases and to decrease the air flow into said chamber as fuel flow decreases; and said intake passage and said valve means being formed to direct air tangentially to said intake port to swirl air inwardly into said mixing chamber for mixing with the liquid fuel spray from said fuel nozzle prior to discharge into said manifold.
Claim 2
Dependent Claim
220 words
In an internal combustion engine having an intake manifold adapted to distribute a fuel-air mixture to engine cylinders, a fuel-air charge forming system comprising: a carburetor housing having a mixing chamber defined by a cylindrical recess open at one end for communication at all times openly and directly with said intake manifold and closed at the opposite end, a liquid fuel nozzle carried at said closed end substantially at the chamber axis and adapted to inject an atomized fuel spray substantially axially into said chamber toward said open end, means for regulating fuel flow to said nozzle, at least one air intake passage in said housing directing air to an intake port opening into the side of said mixing chamber, valve means disposed within said housing adjacent said mixing chamber and operable upon actuation to regulate air flow into said mixing chamber, means connecting said fuel flow regulating means and said valve means to increase air flow into said chamber as fuel flow increases and to decrease the air flow into said chamber as fuel flow decreases; and said intake passage and said valve means being formed to direct air tangentially to said intake port to swirl air inwardly into said mixing chamber for mixing with the liquid fuel spray from said fuel nozzle prior to discharge into said manifold.
Claim 3
Dependent Claim
23 words
The system of claim 1 wherein said valve means is associated with said intake port opening for selectively varying the cross-sectional area thereof.
Claim 4
Dependent Claim
20 words
The system of claim 1 wherein said valve comprises a tubular member fitting within the side wall of said chamber.
Claim 5
Dependent Claim
30 words
The system of claim 1 wherein said valve is rotatable in said chamber and has at least one port variably registerable with said intake port on rotation of said valve.
Claim 6
Dependent Claim
20 words
The system of claim 4 wherein said intake port and said valve port extend longitudinally parallel to said chamber axis.
Claim 7
Dependent Claim
21 words
The system of claim 4 wherein said valve port has bevelled edges to augment tangential entry of air into said chamber.
Claim 8
Dependent Claim
26 words
The system of claim 3 wherein said valve is axially movable in said chamber with one end variably opening said air intake port to said chamber.
Claim 9
Dependent Claim
20 words
The system of claim 7 wherein said air intake port is disposed adjacent the fuel nozzle end of said chamber.
Claim 10
Dependent Claim
16 words
The system of claim 7 wherein said intake port extends longitudinally parallel to said chamber axis.
Claim 11
Dependent Claim
77 words
The system of claim 1 including an adapter plate mounted intermediate said carburetor housing and said intake manifold, said intake manifold having two or more port runners, said plate having an opening therethrough with one end thereof registering with said chamber open end and side walls thereof formed selectively to initiate directional distribution of said mixture from said chamber toward the port runners of said manifold with respect to the engine with which the system is used.
Claim 12
Dependent Claim
39 words
The system of claim 1 and including a surface heated by the exhaust gases of said internal combustion engine disposed down-stream of said mixing chamber for aiding in the vaporizing of the atomized fuel discharged from said mixing chamber.
Claim 13
Dependent Claim
30 words
The system of claim 1 and including an idle stop mechanism responsive to engine manifold pressure associated with said valve means for varying the engine idle setting of said valve.
Claim 14
Dependent Claim
19 words
The system of claim 1 and including means for venting fumes from the engine crankcase into said mixing chamber.
Claim 15
Dependent Claim
20 words
The system of claim 1 and including means for venting evaporative losses from the fuel system into said mixing chamber.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |