US4205643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for supplying fuel to an internal combustion engine
Assignee: Equipements Automobiles Marchal SA
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Filing: 1978-05-31
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Granted: 1980-06-03
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Expires: 1998-05-31
Abstract
No abstract record available.
Inventors
- 👤 Francis R. Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:01
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/0047; F02M37/0052; F02M7/00; F02M7/10; F02M7/106; F02M37/0011; F02M37/0023; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
In a device for supplying a mixture of fuel and combustion gas to an internal combustion motor, which device comprises at least one fluid jet carburetor having fuel inlet and outlet ducts, a fuel reservoir, a pump connected to said inlet duct, a supply duct connecting said reservoir to said pump, and a recycling circuit connected to said outlet duct, the improvement according to which said recycling circuit comprises an intermediate chamber supplied by said outlet duct, said intermediate chamber being connected to said supply duct upstream of the pump and downstream of the reservoir, and means responsive to a sudden change in the level of fuel in said intermediate chamber for gradually changing the flow of fuel from the intermediate chamber to said supply duct whereby a sudden change in the volume of fuel flowing through said outlet duct results in a gradual change in the volume of fuel delivered by said intermediate chamber to said supply duct.
Claim 2
Dependent Claim
159 words
In a device for supplying a mixture of fuel and combustion gas to an internal combustion motor, which device comprises at least one fluid jet carburetor having fuel inlet and outlet ducts, a fuel reservoir, a pump connected to said inlet duct, a supply duct connecting said reservoir to said pump, and a recycling circuit connected to said outlet duct, the improvement according to which said recycling circuit comprises an intermediate chamber supplied by said outlet duct, said intermediate chamber being connected to said supply duct upstream of the pump and downstream of the reservoir, and means responsive to a sudden change in the level of fuel in said intermediate chamber for gradually changing the flow of fuel from the intermediate chamber to said supply duct whereby a sudden change in the volume of fuel flowing through said outlet duct results in a gradual change in the volume of fuel delivered by said intermediate chamber to said supply duct.
Claim 3
Dependent Claim
33 words
Device as claimed in claim 1 in which the connection between the outlet duct of the carburetor and the intermediate chamber comprises means to insure gravity flow of fuel to the intermediate chamber.
Claim 4
Dependent Claim
38 words
Device as claimed in claim 1 in which the volume of the intermediate chamber is sufficient to supply the pump with fuel, at the maximum rate of flow required, for a period of between 1 and 5 seconds.
Claim 5
Dependent Claim
32 words
Device as claimed in claim 1 in which the means responsive to a sudden change in the level of the fuel in the intermediate change is a float valve having a float.
Claim 6
Dependent Claim
21 words
Device as claimed in claim 4 in which the float is associated with a displacement guide means for guiding the float.
Claim 7
Dependent Claim
95 words
Device as claimed in claim 5 in which the displacement guide means for the float is an upright cylinder having vertically spaced perforations and positioned inside the intermediate chamber, the float being positioned inside said perforated cylinder and having a section slightly less than the inner section of said perforated cylinder, the lower part of the floating having a conical shape and cooperating with a conical connecting zone positioned at the bottom of the perforated cylinder, said float closing off said perforations as it descends to gradually increase the restriction to flow from the chamber.
Claim 8
Dependent Claim
70 words
Device as claimed in claim 1 in which said intermediate chamber is connected to said supply duct by a return duct which is shorter than the section of the supply duct between its junction point with said return duct and the reservoir so that the resistance to flow of fuel from said intermediate chamber through said return duct is less than the resistance to flow of fuel from said reservoir.
Claim 9
Dependent Claim
54 words
Device as claimed in claim 1 in which the outlet duct of the carburetor opens into a recovery chamber which constitutes an overflow having an outlet connected to the inlet of the intermediate chamber, the level of the outlet duct in said recovery chamber being above that of the outlet of said recovery chamber.
Claim 10
Dependent Claim
27 words
Automotive vehicle which is supplied with fuel by at least one fluid carburetor, said carburetor being supplied with fuel through a device as claimed in claim 1.
Claim 11
Independent Claim
143 words
A system for supplying fuel to an internal combustion engine comprising, in combination, charge forming means for supplying a fuel charge to the engine; a fuel reservoir connected to said charge forming means by a supply duct; a fuel pump in said supply duct between the fuel reservoir and the charge forming means; an intermediate chamber having an inlet connected to receive fuel from said charge forming means and an outlet connected to said supply duct upstream of the pump and downstream of the reservoir to recycle the fuel to the supply duct; and means responsive to a sudden change in the level of fuel in said intermediate chamber for gradually changing the volume of fuel delivered to said supply duct from the intermediate chamber, so that rapid pressure fluctuations in said supply duct are avoided, and loss of pump priming is minimized.
Claim 12
Independent Claim
143 words
A system for supplying fuel to an internal combustion engine comprising, in combination, charge forming means for supplying a fuel charge to the engine; a fuel reservoir connected to said charge forming means by a supply duct; a fuel pump in said supply duct between the fuel reservoir and the charge forming means; an intermediate chamber having an inlet connected to receive fuel from said charge forming means and an outlet connected to said supply duct upstream of the pump and downstream of the reservoir to recycle the fuel to the supply duct; and means responsive to a sudden change in the level of fuel in said intermediate chamber for gradually changing the volume of fuel delivered to said supply duct from the intermediate chamber, so that rapid pressure fluctuations in said supply duct are avoided, and loss of pump priming is minimized.
Claim 13
Dependent Claim
45 words
The system of claim 10 further comprising recovery chamber means between said intermediate chamber and said charge forming means for receiving fuel by gravity from an excess fuel duct of said charge forming means, and delivering said fuel to said inlet of the intermediate chamber.
References Cited (Backward Citations)
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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) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |