Patent US3916020A successfully refreshed from Google Patents.
US3916020A
Expired / Lapsed
US
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System for controlling pressure by acoustic means
Assignee: Renault SA
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Filing: 1973-05-17
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Granted: 1975-10-28
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Expires: 1993-05-17
Abstract
Abstract A system for controlling pressure in a container, for example the carburetor of an internal combustion engine, from a periodic acoustic source, for example the intake or exhaust of the engine or a selected engine component where the alternating pressure varies only slightly according to engine speed where it is desired to modify the slope of a fuel richness curve over a wide operating range. The system is characterized in that it comprises a conduit connecting the container chamber to the acoustic source, the pressure losses being different according to the direction of flow in the conduit.
Inventors
- 👤 Jean Malphettes
- 👤 Pierre Fontanet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:46
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/10; F02M7/11; F02M5/00; F02M5/08; Y; Y10; Y10S; Y10S261/00; Y10S261/67
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
57 words
A METHOD OF CORRECTING CARBURETION ERRORS IN INTERNAL COMBUSTION ENGINES COMPRISING THE STEPS OF VENTING THE CARBURETOR FLOAT CHAMBER THROUGH A CONDUIT WHOSE PRESSURE LOSS COEFFICIENT IS DIFFERENT DEPENDING UPON THE DIRECTION OF FLOW IN THE CONDUIT AND CONNECTING THE CONDUIT TO VENT THE FLOW CHAMBER TO A PERIODIC ACOUSTIC SOURCE OF THE ENGINE TO ESTABLISH A
Claim 2
Independent Claim
57 words
A METHOD OF CORRECTING CARBURETION ERRORS IN INTERNAL COMBUSTION ENGINES COMPRISING THE STEPS OF VENTING THE CARBURETOR FLOAT CHAMBER THROUGH A CONDUIT WHOSE PRESSURE LOSS COEFFICIENT IS DIFFERENT DEPENDING UPON THE DIRECTION OF FLOW IN THE CONDUIT AND CONNECTING THE CONDUIT TO VENT THE FLOW CHAMBER TO A PERIODIC ACOUSTIC SOURCE OF THE ENGINE TO ESTABLISH A
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the venting conduit is connected to establish a positive static pressure in the float chamber.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the venting conduit is connected to establish a negative static pressure in the float chamber.
Claim 5
Dependent Claim
126 words
Apparatus for correcting carburetion errors in internal combustion engines comprising a carburetor including a float chamber and an intake passage containing a venturi tube, a fuel supply passage leading from said float chamber to said intake passage, a venturi jet disposed in said intake passage to receive the fuel supplied through said fuel supply passage and deliver the received fuel to the restricted area of said venturi tube, an air filter connected to the intake end of said intake passage, and conduit means interconnecting said float chamber and said air filter, said conduit means having a pressure loss coefficient in one direction of flow different from the pressure loss coefficient in the other direction of flow to establish a preselected static pressure in said float chamber.
Claim 6
Dependent Claim
126 words
Apparatus for correcting carburetion errors in internal combustion engines comprising a carburetor including a float chamber and an intake passage containing a venturi tube, a fuel supply passage leading from said float chamber to said intake passage, a venturi jet disposed in said intake passage to receive the fuel supplied through said fuel supply passage and deliver the received fuel to the restricted area of said venturi tube, an air filter connected to the intake end of said intake passage, and conduit means interconnecting said float chamber and said air filter, said conduit means having a pressure loss coefficient in one direction of flow different from the pressure loss coefficient in the other direction of flow to establish a preselected static pressure in said float chamber.
References Cited (Backward Citations)
US2732835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |