US3948236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of regulating the fuel supply of internal combustion engines
Assignee: Automobiles Peugeot SA
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Filing: 1973-09-27
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Granted: 1976-04-06
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Expires: 1993-09-27
Abstract
Abstract A method and apparatus for regulating the fuel supply of internal combustion engines having carburetion, specifically the richness of the air-fuel mixture, as a function of engine speed and atmospheric pressure. The richness is controlled by a supply of pressurized air downstream from the carburetor in the intake manifold, which is controlled in a self-evident manner by a bellows and by the amplified pressure at the carburetor venturi. Application to internal combustion engines with carburetors using a pump supplying pressurized air for anti-pollution purposes is intended.
Inventors
- 👤 Andre Nartowski
- 👤 Claude Henault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:30
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A method of regulating the fuel supply of carbureted internal combustion engines as a function of altitude, speed and load on the motor, characterized by the steps of: controlling the richness of the air-fuel mixture by supplying additional pressurized air into the intake manifold downstream of the carburetor; and controlling said supply of pressurized air in a self-evident manner with a barometric responsive bellows and in accordance with the amplified pressure sensed at the carburetor venturi throat.
Claim 2
Independent Claim
77 words
A method of regulating the fuel supply of carbureted internal combustion engines as a function of altitude, speed and load on the motor, characterized by the steps of: controlling the richness of the air-fuel mixture by supplying additional pressurized air into the intake manifold downstream of the carburetor; and controlling said supply of pressurized air in a self-evident manner with a barometric responsive bellows and in accordance with the amplified pressure sensed at the carburetor venturi throat.
Claim 3
Dependent Claim
28 words
A method of regulation as set forth in claim 1 characterized by closing said bellows-operated valve at normal atmospheric pressure and opening the same continuously as altitude increases.
Claim 4
Dependent Claim
35 words
A method of regulation as set forth in claim 1, wherein the increased vacuum at the carburetor venturi causes further opening of the corresponding control valve and a correlative increase in the supply of air.
Claim 5
Dependent Claim
36 words
A method of regulation as set forth in claim 1, characterized by supplying said additional air with an air pump driven by a motor which simultaneously supplies pressurized air to an anti-pollution device in the exhaust.
Claim 6
Independent Claim
123 words
An apparatus for regulating the fuel supply of carbureted internal combustion engines as a function of altitude, speed and load on the motor, comprising: an air pump; conduit means connecting said air pump and said intake manifold of said engine for injecting air from said air pump into said intake manifold near the carburetor and downstream thereof; a fluid amplifier connected to the vacuum of the throat of the carburetor of said engine and to the intake manifold; a diaphragm-operated valve in said conduit means being operative by said fluid amplifier; a second valve in said conduit means between said air pump and said fluid amplifier; and means responsive to the barometric pressure for controlling the degree of opening of said second valve.
Claim 7
Independent Claim
123 words
An apparatus for regulating the fuel supply of carbureted internal combustion engines as a function of altitude, speed and load on the motor, comprising: an air pump; conduit means connecting said air pump and said intake manifold of said engine for injecting air from said air pump into said intake manifold near the carburetor and downstream thereof; a fluid amplifier connected to the vacuum of the throat of the carburetor of said engine and to the intake manifold; a diaphragm-operated valve in said conduit means being operative by said fluid amplifier; a second valve in said conduit means between said air pump and said fluid amplifier; and means responsive to the barometric pressure for controlling the degree of opening of said second valve.
Claim 8
Dependent Claim
14 words
Apparatus according to claim 5, wherein said pressure responsive means is a bellows device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |