US3763839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel system apparatus and method
Assignee: Phillips Petroleum Co
•
Filing: 1971-11-24
•
Granted: 1973-10-09
•
Expires: 1991-11-24
Abstract
Abstract In a fuel system of an engine having a fuel tank, carburetor, and inlet and outlet manifolds, means are provided for passing fuel vapors into an absorber for retention therein and delivery into the intake manifold during starting of the engine and for a period thereafter. The flow of the fuel vapor from the absorber is terminated and fuel delivery from the carburetor into the intake manifold is initiated in response to an increase in the temperature of the exhaust manifold.
Inventors
- 👤 H Alquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:35
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/089
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
A fuel system of a combustion zone having an exhaust manifold, comprising: a fuel tank; an intake manifold; an absorber having an absorbent therein; first means for passing fuel from the tank, mixing air with the fuel, and passing a resultant fuel-air mixture into the manifold; second means for passing fuel vapor from the tank into contact with the absorbent; third means for passing fuel vapor from the absorbent into the manifold; and fourth means for selectively passing fuel vapor from the absorbent into the manifold and preventing the passage of the mixture into the manifold in response to initiation of combustion zone operation and preselected first, low temperature conditions of the exhaust manifold, passing the mixture and fuel vapor from the absorbent into the manifold in response to second, preselected medium temperature conditions of the exhaust manifold, and passing the mixture into the manifold and preventing the passage of fuel vapor from the absorber into the manifold in response to third, preselected higher temperature conditions of the exhaust manifold.
Claim 2
Dependent Claim
170 words
A fuel system of a combustion zone having an exhaust manifold, comprising: a fuel tank; an intake manifold; an absorber having an absorbent therein; first means for passing fuel from the tank, mixing air with the fuel, and passing a resultant fuel-air mixture into the manifold; second means for passing fuel vapor from the tank into contact with the absorbent; third means for passing fuel vapor from the absorbent into the manifold; and fourth means for selectively passing fuel vapor from the absorbent into the manifold and preventing the passage of the mixture into the manifold in response to initiation of combustion zone operation and preselected first, low temperature conditions of the exhaust manifold, passing the mixture and fuel vapor from the absorbent into the manifold in response to second, preselected medium temperature conditions of the exhaust manifold, and passing the mixture into the manifold and preventing the passage of fuel vapor from the absorber into the manifold in response to third, preselected higher temperature conditions of the exhaust manifold.
Claim 3
Dependent Claim
75 words
A fuel system, as set forth in claim 1, wherein the fourth means comprises: a first choke plate positioned in the third means and being movable between a first position at which the absorbent is in communication with the manifold and a second position at which the first choke plate is obstRucting said communication; and a second choke plate associated with the first means and connected to the first choke plate for synchronous movement therewith.
Claim 4
Dependent Claim
55 words
A fuel system, as set forth in claim 2, including a weighing-signalling means for measuring the weight of the absorber and materials contained therein and delivering a signal responsive to said measurement being less than a preselected value; and means for increasing the rate of vapor passing to the absorbent in response to said signal.
Claim 5
Dependent Claim
55 words
A fuel system, as set forth in claim 1, including a weighing-signalling means for measuring the weight of the absorber and materials contained therein and delivering a signal responsive to said measurement being less than a preselected value; and means for increasing the rate of vapor passing to the absorbent in response to said signal.
Claim 6
Dependent Claim
63 words
A fuel system, as set forth in claim 3, wherein the first choke plate is connected to a thermostatically operated spring for moving the first choke plate between the first and second positions in response to the temperature of said spring; and means for maintaining the temperature of said spring at a temperature representative of the temperature of the combustion gas exhaust manifold.
Claim 7
Dependent Claim
16 words
A fuel system, as set forth in claim 1, wherein the combustion zone comprises an engine.
Claim 8
Independent Claim
161 words
A method, for operating a fuel system of a fuel combustion zone having a fuel tank, intake and exhaust manifolds, an absorber having absorbent and being connected in fluid communication with the fuel tank and the intake manifold, and a carburetor connected to the fuel tank and the intake manifold, comprising: passing fuel vapors from the absorber into the intake manifold and preventing the passage of fluid from the carburetor into the intake manifold for initiating combustion and increasing the temperature of the exhaust manifold to a preselected value; controllably passing the fuel vapor from the absorber into the intake manifold and fuel from the carburetor into the intake manifold in response to second preselected medium temperatures of the exhaust manifold; and passing the fuel from the carburetor into the intake manifold and preventing the passage of fuel vapor from the absorber into the intake manifold in response to the temperature of the exhaust manifold being greater than a preselected value.
Claim 9
Independent Claim
161 words
A method, for operating a fuel system of a fuel combustion zone having a fuel tank, intake and exhaust manifolds, an absorber having absorbent and being connected in fluid communication with the fuel tank and the intake manifold, and a carburetor connected to the fuel tank and the intake manifold, comprising: passing fuel vapors from the absorber into the intake manifold and preventing the passage of fluid from the carburetor into the intake manifold for initiating combustion and increasing the temperature of the exhaust manifold to a preselected value; controllably passing the fuel vapor from the absorber into the intake manifold and fuel from the carburetor into the intake manifold in response to second preselected medium temperatures of the exhaust manifold; and passing the fuel from the carburetor into the intake manifold and preventing the passage of fuel vapor from the absorber into the intake manifold in response to the temperature of the exhaust manifold being greater than a preselected value.
Claim 10
Dependent Claim
51 words
A method, as set forth in claim 7, including measuring the weight of the absorber and materials contained therein; delivering a signal responsive to said measurement being less than a preselected value; and increasing the rate of vapor passing from the fuel tank to the absorber in response to said signal.
Claim 11
Dependent Claim
15 words
A method, as set forth in claim 7, wherein the combustion zone is an engine.
Claim 12
Dependent Claim
63 words
An apparatus, as set forth in claim 2, wherein the first choke plate is connected to a thermostatically operated spring for moving the first choke plate between the first and second positions in response to the temperature of said spring; and means for maintaining the temperature of said spring at a temperature representative of the temperature of an associated combustion gas exhaust manifold.
References Cited (Backward Citations)
US3191587A
Cited
US3093124A
Cited
US3456635A
Cited
US3563007A
Cited
US3572013A
Cited
US3685504A
Cited
US3680318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |