US4357285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal regulator for fuel and air to a carburetor
Assignee: Individual
•
Filing: 1981-03-27
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Granted: 1982-11-02
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Expires: 2001-03-27
Abstract
Abstract An apparatus for providing fuel of a predetermined temperature and at a predetermined fuel rate based on demand to a carburetor of an internal combustion engine comprising a temperature regulated air flow mixer valve, a cool air inlet to the valve, a warm air inlet to the valve, a thermal balancing chamber connected to the outlet of the valve including a fuel pressure control valve mounted thereon, an expansion chamber mounted on the thermal balancing chamber and a fuel metering valve mounted at the outlet of the thermal expansion chamber. The fuel metering valve is responsive to engine vacuum. The thermally-regulated air flow mixer valve is responsive to the mixture in the intake manifold, and mixes the cool air and warm air to produce a desired temperature in the thermal balancing chamber. The warm air inlet includes a heat exchanger mounted in the exhaust manifold of the engine for warming intake air.
Inventors
- 👤 Jose L. Pallares-Martinez
- 👤 Jose Pallares-Osorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:38
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/12; F02M7/18; F02M7/20; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/07; F02M31/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
An apparatus for providing fuel of a predetermined temperature and at a predetermined feed rate based on demand to a carburetor of an internal combustion engine comprising: a temperature-regulated air flow mixer valve having two inlets, one outlet and means for sensing temperature of the interior of an intake manifold of the engine and operating the valve accordingly; cool air inlet means connected to one of said inlets of said valve; warm air inlet means connected to the other of said inlets of said valve having means associated with an exhaust manifold of the engine for warming air; a thermal balancing chamber having a tube passing therethrough connected to said outlet of said mixer valve, a fuel inlet, a fuel outlet and a fuel pressure control valve mounted thereon and connected to a fuel tank; means mounted on said chamber for providing elastic expansion space for fuel in said chamber; and means mounted at said outlet of said chamber responsive to engine vacuum for metering fuel flow to the carburetor based on demand.
Claim 2
Independent Claim
173 words
An apparatus for providing fuel of a predetermined temperature and at a predetermined feed rate based on demand to a carburetor of an internal combustion engine comprising: a temperature-regulated air flow mixer valve having two inlets, one outlet and means for sensing temperature of the interior of an intake manifold of the engine and operating the valve accordingly; cool air inlet means connected to one of said inlets of said valve; warm air inlet means connected to the other of said inlets of said valve having means associated with an exhaust manifold of the engine for warming air; a thermal balancing chamber having a tube passing therethrough connected to said outlet of said mixer valve, a fuel inlet, a fuel outlet and a fuel pressure control valve mounted thereon and connected to a fuel tank; means mounted on said chamber for providing elastic expansion space for fuel in said chamber; and means mounted at said outlet of said chamber responsive to engine vacuum for metering fuel flow to the carburetor based on demand.
Claim 3
Dependent Claim
146 words
The apparatus of claim 1 wherein: the air flow mixer valve comprises: a cylindrical body having two ends, a central axial bore; a pair of inlet bores in one side of said body perpendicular to said axial bore and intersecting in said bore on a side of said axial bore away from said one side; and an outlet bore in said body joining the intersection of said inlet bores; a shaft rotatably mounted in said axial bore and extending beyond said two ends, said shaft having a pair of orifices therethrough at positions where said pair of inlet bores cross said axial bore; limit means on one end of said shaft for limiting rotational travel of said shaft; and said means for sensing temperature of the interior of the intake manifold being mounted on the end of the shaft opposite the end having the limit means.
Claim 4
Dependent Claim
20 words
The apparatus of claim 2 wherein the means for sensing temperature comprises a bimetallic coil extending into said intake manifold.
Claim 5
Dependent Claim
60 words
The apparatus of claim 2 wherein the cool air inlet means includes a diffusor having a first conical portion, a cylindrical portion and a second conical portion; an air filter mounted adjacent said first conical portion; an air fan in said cylindrical portion; and a conduit connecting the second conical portion to the inlet of the air flow mixer valve.
Claim 6
Dependent Claim
20 words
The apparatus of claim 2 wherein the means for warming air comprises a heat exchanger mounted in the exhaust manifold.
Claim 7
Dependent Claim
22 words
The apparatus of claim 2 wherein said tube has radially extending fins thereon extending into the interior of said thermal balancing chamber.
Claim 8
Dependent Claim
42 words
The apparatus of claim 2 wherein the means for providing elastic expansion space comprises a cylindrical body having an open interior and a passage open to the interior of the thermal balancing chamber, and a piston displaceably positioned in said open interior.
Claim 9
Dependent Claim
137 words
The apparatus of claim 2 wherein the means for metering fuel flow comprises a base, a diaphragm dividing the interior of the base into a first portion and a second portion, a spring in said second portion biasing said diaphragm in a first direction, a first conduit connected between said second portion and a source of engine vacuum, an extension portion of said first portion having a hollow bore extending into said thermal balancing chamber, a valve seat at an end of said extension portion adjacent said thermal balancing chamber, a needle valve attached to said diaphragm having a hollow stem, an open end and a cross-passage, said needle valve extending into said extension portion and seatable on said valve seat and a fuel outlet connected to said extension portion adjacent said cross-passage of said needle valve.
Claim 10
Dependent Claim
49 words
The apparatus of claim 2 further comprising a compensatory fuel expansion chamber provided adjacent the fuel tank comprising a storage cylinder, a displaceable piston in said storage cylinder, a first conduit connected to said fuel tank and a second overflow conduit connected to an inlet of a fuel pump.
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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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |