US3854288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for exhaust gas cleaning
Assignee: Volkswagen AG
•
Filing: 1972-06-12
•
Granted: 1974-12-17
•
Expires: 1992-06-12
Abstract
Abstract A combustion engine emitting an exhuast gas in the process of its operation having a cleaning arrangement for cleaning the exhaust gas, such cleaning arrangement having a thermal reactor for oxidizing the components in the exhust gas and a first catalyzer placed upstream with respect to the flow of the exhaust gas before the thermal reactor for performing a reduction of the components in the exhaust gas, the catalyzer having a hollow body surrounding the thermal reactor, a housing for receiving the catalyzer and the thermal reactor, the catalyzer forming with the housing a chamber, and an input conduit for the exhuast gas terminating in such chamber.
Inventors
- 👤 H Heitland
- 👤 P Manderscheid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:16
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; F01N13/00; F01N13/009; F01N3/18; F01N3/20; F01N3/2006; F01N3/2033; F01N3/30; F01N3/306; F01N3/38; F01N5/00; F01N5/02; F01N2250/00; F01N2250/04; F01N2270/00; F01N2270/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A combustion engine emitting an exhaust gas in the process of its operation comprising a cleaning arrangement for cleaning the exhaust gas, said cleaning arrangement comprising a thermal reactor for oxidizing the components in the exhaust gas and a first catalyzer placed upstream with respect to the flow of exhaust gases before the thermal reactor for performing a reduction of the components in the exhaust gas, said first catalyzer comprising a hollow body surrounding said thermal reactor, a housing for receiving said first catalyzer and said thermal reactor, said first catalyzer forming with said housing a chamber, and an input conduit for the exhaust gases terminating in said chamber, said thermal reactor comprising a heating arrangement including a fuel supply, a secondary air supply and sparkplug means for igniting the fuel and air mixture supply to said thermal reactor, said heating arrangement being placed adjacent an end wall portion of said housing into which said thermal reactor and said first catalyzer are placed, said housing comprising another end wall portion including an exhaust gas output conduit.
Claim 2
Dependent Claim
176 words
A combustion engine emitting an exhaust gas in the process of its operation comprising a cleaning arrangement for cleaning the exhaust gas, said cleaning arrangement comprising a thermal reactor for oxidizing the components in the exhaust gas and a first catalyzer placed upstream with respect to the flow of exhaust gases before the thermal reactor for performing a reduction of the components in the exhaust gas, said first catalyzer comprising a hollow body surrounding said thermal reactor, a housing for receiving said first catalyzer and said thermal reactor, said first catalyzer forming with said housing a chamber, and an input conduit for the exhaust gases terminating in said chamber, said thermal reactor comprising a heating arrangement including a fuel supply, a secondary air supply and sparkplug means for igniting the fuel and air mixture supply to said thermal reactor, said heating arrangement being placed adjacent an end wall portion of said housing into which said thermal reactor and said first catalyzer are placed, said housing comprising another end wall portion including an exhaust gas output conduit.
Claim 3
Dependent Claim
26 words
The cleaning arrangement as claimed in claim 1, further comprising a second catalyzer coupled to said output conduit for oxidizing the components in said exhaust gas.
Claim 4
Dependent Claim
31 words
The cleaning arrangement as claimed in claim 1, wherein said output conduit of said exhaust gas comprising a feedback portion arranged for preheating the secondary air input to said thermal reactor.
Claim 5
Dependent Claim
44 words
The cleaning arrangement as claimed in claim 2, for use with a four cylinder engine, said cleaning arrangement being used with two of said cylinders of said four cylinder engine and another cleaning arrangement is placed for operation with the other pair of cylinders.
Claim 6
Dependent Claim
43 words
The cleaning arrangement as claimed in claim 1, wherein said catalyzer body is an annular body surrounding said thermal reactor and said catalyzer forming an annular chamber with said housing for enabling the exhaust gas to be uniformly distributed over said first catalyzer.
Claim 7
Dependent Claim
168 words
A cleaning arrangement for cleaning the exhaust gas coming from a combustion engine, said cleaning arrangement comprising a thermal reactor for oxidizing the components in the exhaust gas and a first catalyzer placed upstream with respect to the flow of exhaust gases before the thermal reactor for performing a reduction of the components in the exhaust gas, said first catalyzer comprising a hollow body surrounding said thermal reactor, a housing for receiving said first catalyzer and said thermal reactor, said first catalyzer forming with said housing a chamber, and an input conduit for the exhaust gases terminating in said chamber, said thermal reactor comprising a heating arrangement including a fuel supply, a secondary air supply and sparkplug means for igniting the fuel and air mixture supply to said thermal reactor, said heating arrangement being placed adjacent to an end wall portion of said housing In which said thermal reactor and said first catalyzer are placed, said housing comprising another end wall portion including an exhaust gas output conduit.
Claim 8
Dependent Claim
168 words
A cleaning arrangement for cleaning the exhaust gas coming from a combustion engine, said cleaning arrangement comprising a thermal reactor for oxidizing the components in the exhaust gas and a first catalyzer placed upstream with respect to the flow of exhaust gases before the thermal reactor for performing a reduction of the components in the exhaust gas, said first catalyzer comprising a hollow body surrounding said thermal reactor, a housing for receiving said first catalyzer and said thermal reactor, said first catalyzer forming with said housing a chamber, and an input conduit for the exhaust gases terminating in said chamber, said thermal reactor comprising a heating arrangement including a fuel supply, a secondary air supply and sparkplug means for igniting the fuel and air mixture supply to said thermal reactor, said heating arrangement being placed adjacent to an end wall portion of said housing In which said thermal reactor and said first catalyzer are placed, said housing comprising another end wall portion including an exhaust gas output conduit.
Claim 9
Dependent Claim
26 words
The cleaning arrangement as claimed in claim 6, further comprising a second catalyzer coupled to said output conduit for oxidizing the components in said exhaust gas.
Claim 10
Dependent Claim
31 words
The cleaning arrangement as claimed in claim 6, wherein said output conduit of said exhaust gas comprises a feedback portion arranged for preheating the secondary air input to said thermal reactor.
Claim 11
Dependent Claim
43 words
The cleaning arrangement as claimed in claim 6, wherein said catalyzer body is an annular body surrounding said thermal reactor and said catalyzer forming an annular chamber with said housing for enabling the exhaust gas to be uniformly distributed over said first catalyzer.
References Cited (Backward Citations)
US3013628A
Cited
US3066755A
Cited
US3166895A
Cited
US3228746A
Cited
US3220179A
Cited
US3380810A
Cited
US3404965A
Cited
US3544264A
Cited
US3644098A
Cited
US3804597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |