US3733829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depollution gases
Assignee: Renault SA
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Filing: 1972-10-05
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Granted: 1973-05-22
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Expires: 1992-10-05
Abstract
Abstract An apparatus for supplying air to a catalytic, oxidizingreducing reactor for the exhaust gases from an internal combustion engine. An air pump with an output rate at least twice that required for complete combustion of carbon monoxide delivers an amount of air to a pair of catalytic beds which are adjusted from common thermostatically and discontinuously controlled distribution means determined by the catalytic bed temperatures, such that the reducing bed initially functions as an oxidizer and the oxidizing bed is cooled by excess air the moment a critical temperature is reached.
Inventors
- 👤 C Henault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; F01N13/00; F01N13/009; F01N3/22; F01N3/222; F01N3/24; F01N3/30; F01N3/32; F01N2260/00; F01N2260/02; F01N2260/022; F01N2270/00; F01N2270/02; F01N2390/00; F01N2390/02; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A control device for a dual bed catalytic reactor capable of reducing pollutants from exhaust gases, comprising: means for supplying air to said reactor in an amount at least twice that necessary for complete combustion of carbon monoxide; means for sensing the temperature of each bed of said dual bed catalytic reactor; a conduit for introducing air continuously to an exhaust manifold in an amount slightly less than that necessary for stoichiometric combustion conditions; and, means for distributing the air from said air supplying means, said distributing means including at least four outlets of which only two are open at a given time, two of said outlets being capable of respectively feeding air in a limited capacity to one or the other of said catalytic beds, one of said outlets being capable of exhaust to atmosphere, and one of said outlets being capable of high-flow output of air for feeding the inlet of one of said catalytic beds.
Claim 2
Dependent Claim
158 words
A control device for a dual bed catalytic reactor capable of reducing pollutants from exhaust gases, comprising: means for supplying air to said reactor in an amount at least twice that necessary for complete combustion of carbon monoxide; means for sensing the temperature of each bed of said dual bed catalytic reactor; a conduit for introducing air continuously to an exhaust manifold in an amount slightly less than that necessary for stoichiometric combustion conditions; and, means for distributing the air from said air supplying means, said distributing means including at least four outlets of which only two are open at a given time, two of said outlets being capable of respectively feeding air in a limited capacity to one or the other of said catalytic beds, one of said outlets being capable of exhaust to atmosphere, and one of said outlets being capable of high-flow output of air for feeding the inlet of one of said catalytic beds.
Claim 3
Dependent Claim
48 words
A control device as set forth in claim 1 wherein during the starting phases of said reactor only the atmospheric outlet and one of said outlets capable of feeding air in a limited capacity are in the open position such that starting and temperature rise occurs during oxidation.
Claim 4
Dependent Claim
51 words
A control device as set forth in claim 1 wherein said catalytic beds are in series and wherein a sensed predetermined temperature upstream of the first bed will trigger the closing of supplementary air flow to the upstream catalytic bed and opening of the limited-flow outlet to the downstream catalytic bed.
Claim 5
Dependent Claim
40 words
A control device as set forth in claim 3 wherein a sensed predetermined temperature in the downstream oxidizing catalytic bed will trigger the closing of the atmospheric outlet and opening of the high-flow outlet to the downstream oxidizing catalytic bed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |