US3685502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle emission control system
Assignee: Sunoco Inc
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Filing: 1971-03-04
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Granted: 1972-08-22
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Expires: 1991-03-04
Abstract
Abstract Emission from motor vehicle exhausts of oxides of nitrogen, carbon monoxide, hydrocarbons, and aldehydes is reduced by a combination of selective enrichment of the fuel-air mixture fed by the carburetor to the engine, and an exhaust converter, e.g., a thermal exhaust reactor. The selective enrichment is carried out under low speed, mild acceleration (urban) driving conditions.
Inventors
- 👤 Paul E Oberdorfer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:39
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/12; F02M7/18; F02M7/20; Y; Y10; Y10S; Y10S261/00; Y10S261/74
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
An exhaust emission control arrangement for a motor vehicle internal combustion engine using a fossil fuel, comprising a carburetor for feeding a fuel-air mixture to the intake of said engine, enriching means for increasing the fuel-air ratio in said mixture, means for actuating said enriching means at engine or vehicle speeds below a predetermined speed but above idle speed and for terminating the action of said enriching means upon reaching said predetermined speed, and means acting upon the effluent from the combustion chambers of said engine for converting at least a part of the carbon monoxide and hydrocarbons contained in said effluent to harmless substances.
Claim 2
Dependent Claim
105 words
An exhaust emission control arrangement for a motor vehicle internal combustion engine using a fossil fuel, comprising a carburetor for feeding a fuel-air mixture to the intake of said engine, enriching means for increasing the fuel-air ratio in said mixture, means for actuating said enriching means at engine or vehicle speeds below a predetermined speed but above idle speed and for terminating the action of said enriching means upon reaching said predetermined speed, and means acting upon the effluent from the combustion chambers of said engine for converting at least a part of the carbon monoxide and hydrocarbons contained in said effluent to harmless substances.
Claim 3
Dependent Claim
56 words
Arrangement recited in claim 1, wherein said enriching means includes a power valve incorporated in said carburetor, said valve when operated to open position supPlying fuel to the engine intake; and wherein said actuating means causes operation of said valve to open position at engine or vehicle speeds below a predetermined speed but above idle speed.
Claim 4
Dependent Claim
20 words
Arrangement recited in claim 1, wherein the last-mentioned means comprises a thermal reactor receptive of and acting upon said effluent.
Claim 5
Dependent Claim
74 words
An exhaust emission control arrangement for a motor vehicle internal combustion engine using a fossil fuel, comprising a carburetor for feeding a fuel-air mixture to the intake of said engine, enriching means for increasing the fuel-air ratio in said mixture, and means for actuating said enriching means at engine or vehicle speeds below a predetermined speed but above idle speed and for terminating the action of said enriching means upon reaching said predetermined speed.
Claim 6
Dependent Claim
74 words
An exhaust emission control arrangement for a motor vehicle internal combustion engine using a fossil fuel, comprising a carburetor for feeding a fuel-air mixture to the intake of said engine, enriching means for increasing the fuel-air ratio in said mixture, and means for actuating said enriching means at engine or vehicle speeds below a predetermined speed but above idle speed and for terminating the action of said enriching means upon reaching said predetermined speed.
Claim 7
Dependent Claim
56 words
Arrangement recited in claim 4, wherein said enriching means includes a power valve incorporated in said carburetor, said valve when operated to open position supplying fuel to the engine intake; and wherein said actuating means causes operation of said valve to open position at engine or vehicle speeds below a predetermined speed but above idle speed.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |