Patent US3828736A successfully refreshed from Google Patents.
US3828736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for operating combustion engines
Assignee: Siemens AG
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Filing: 1972-01-18
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Granted: 1974-08-13
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Expires: 1992-01-18
Abstract
Abstract Method and apparatus for the combustion of a fuel, free of detrimental substances, in a combustion engine. The fuel, together with oxygen containing gas, is passed over a catalyst for conversion into a gas mixture of methane and carbon monoxide. Passing the gas mixture together with additional oxygen containing gas to the combustion engine whereat the gas mixture is burned producing an exhaust gas. Feeding part of the exhaust gas to the fuel, prior to the conversion of the fuel.
Inventors
- 👤 C Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:13
CPC Classifications
F; F02; F02M; F02M27/00; F02M27/02; F23; F23R; F23R3/00; F23R3/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
25 words
The method of claim 1, wherein fresh air is added to the fuel free of detrimental substances, prior to the catalytic conversion of the fuel.
Claim 2
Dependent Claim
22 words
The method of claim 1, wherein a nickel catalyst, a platinum catalyst or a platinum-nickel mixed catalyst is used as the catalyst.
Claim 3
Dependent Claim
13 words
The method of claim 3, wherein a catalyst doped with uranium is used.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein the fuel gas mixture is fed over the catalyst at a temperature of 300* to 500* C.
Claim 5
Dependent Claim
33 words
The method of claim 1, wherein the heat required for the conversion of the fuel at the catalyst is supplied by utilizing the heat content of the exhaust gases leaving the combustion engine.
Claim 6
Dependent Claim
13 words
Method according to claim 1 wherein the fuel has a low octane number.
Claim 7
Dependent Claim
66 words
Method according to claim 1 wherein the oxygencontaining gas is air in an approximate given amount corresponding to about 14 percent of the quantity of air required for stoichiometric combustion of the fuel and, in addition to the given amount of air, admixing therewith and with the fuel an amount of the combustion engine exhaust gases that is approximately equal to the given amount of air.
Claim 8
Dependent Claim
43 words
Method according to claim 1 which comprises, at start-up of the combustion engine, applying the heat content of exhaust gas from a burner to the catalytic material so as to raise the temperature of the catalytic material to elevated temperature for catalytic conversion.
Claim 9
Independent Claim
168 words
A device for the operation of combustion engines which comprises a catalytic chamber, a catalyst-containing porous catalyst carrier disposed in said catalytic chamber, said catalyst carrier comprising a plurality of highly porous sintered bodies spaced one from the other in flow direction of a mixture of fuel and oxygen-containing gas, said sintered bodies being formed with a multiplicity of passages for the fuel and gas mixture extending substantially parallel to one another, a pump for feeding the fuel, an evaporator for vaporizing the fuel having a mixing nozzle for mixing evaporated fuel with the oxygen-containing gas, said pump and said evaporator being located in said flow direction sequentially ahead of and communicating with an entrance to said catalytic chamber, said catalytic chamber also having an exit, a further mixing nozzle for mixing with fresh air the gaseous product obtained by catalysis of the evaporated fuel and the oxygen-containing gas in said catalytic chamber, said further mixing nozzle extending from said exit and being connectible to a combustion engine.
Claim 10
Dependent Claim
45 words
Device according to claim 10 including heat exchanger means located adjacent said catalytic chamber and said evaporator, said heat exchanger means being connectible to the exhaust discharge of the combustion engine for passing hot exhaust gases therethrough to heat said catalytic chamber and said evaporator.
Claim 11
Dependent Claim
42 words
Device according to claim 10 wherein at least the closest sintered body to said entrance to said catalytic chamber contains a catalyst differing from that contained in the next succeeding sintered bodies in direction of flow of the fuel and gas mixture.
Claim 12
Dependent Claim
49 words
Device according to claim 10 wherein said plurality of sintered bodies comprises a first sintered body located closest to said entrance to said catalytic chamber and containing platinum as catalyst, and three succeeding sintered bodies in flow direction of the fuel and gas mixture containing a platinum-nickel mixed catalyst.
Claim 13
Dependent Claim
43 words
Device according to claim 10 comprising an ignition device located at said entrance to said catalytic chamber, and a burner plate disposed adjacent to and upstream of the sintered body closest to said entrance in flow direction of the fuel and gas mixture.
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |