US3703082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the detoxification of exhaust gases of internal combustion engines
Assignee: Arvin Industries Deutschland GmbH
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Filing: 1971-09-13
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Granted: 1972-11-21
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Expires: 1991-09-13
Abstract
Abstract An after burning device for an internal combustion engine has an inner combustion chamber totally enclosed in an outer, heat insulated combustion chamber. Some of the exhaust gas conduits form the engine exhaust directly into the outer chamber, while other exhaust gas conduits pass through the outer chamber and are exhausted into the inner chamber.
Inventors
- 👤 Andres Santiago
- 👤 Enrique Santiago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
163 words
In an apparatus for the detoxification of the exhaust gases of an internal combustion engine having several cylinders, by after burning the exhaust gases in a plurality of after burner combustion chambers, into which separate exhaust gas conduits from said engine discharge the exhaust gases, the improvement comprising an outer after burner combustion chamber, an inner after burner combustion chamber, means for supporting the inner combustion chamber inside said outer combustion chamber, heat insulation means surrounding said outer combustion chamber, means for sealing said combustion chambers with respect to each other to substantially prevent intermixing of the exhaust gases present in the combustion chambers and separate conduit means for connecting said chambers to said engine, said conduit means being allocated to the individual engine cylinders so that the cylinders are distributed to the two combustion chambers in the sense of power tuning, whereby the exhaust gas currents flowing into the same after burner combustion chamber enter said chamber without interfering with each other.
Claim 2
Dependent Claim
163 words
In an apparatus for the detoxification of the exhaust gases of an internal combustion engine having several cylinders, by after burning the exhaust gases in a plurality of after burner combustion chambers, into which separate exhaust gas conduits from said engine discharge the exhaust gases, the improvement comprising an outer after burner combustion chamber, an inner after burner combustion chamber, means for supporting the inner combustion chamber inside said outer combustion chamber, heat insulation means surrounding said outer combustion chamber, means for sealing said combustion chambers with respect to each other to substantially prevent intermixing of the exhaust gases present in the combustion chambers and separate conduit means for connecting said chambers to said engine, said conduit means being allocated to the individual engine cylinders so that the cylinders are distributed to the two combustion chambers in the sense of power tuning, whereby the exhaust gas currents flowing into the same after burner combustion chamber enter said chamber without interfering with each other.
Claim 3
Dependent Claim
163 words
In an apparatus for the detoxification of the exhaust gases of an internal combustion engine having several cylinders, by after burning the exhaust gases in a plurality of after burner combustion chambers, into which separate exhaust gas conduits from said engine discharge the exhaust gases, the improvement comprising an outer after burner combustion chamber, an inner after burner combustion chamber, means for supporting the inner combustion chamber inside said outer combustion chamber, heat insulation means surrounding said outer combustion chamber, means for sealing said combustion chambers with respect to each other to substantially prevent intermixing of the exhaust gases present in the combustion chambers and separate conduit means for connecting said chambers to said engine, said conduit means being allocated to the individual engine cylinders so that the cylinders are distributed to the two combustion chambers in the sense of power tuning, whereby the exhaust gas currents flowing into the same after burner combustion chamber enter said chamber without interfering with each other.
Claim 4
Dependent Claim
163 words
In an apparatus for the detoxification of the exhaust gases of an internal combustion engine having several cylinders, by after burning the exhaust gases in a plurality of after burner combustion chambers, into which separate exhaust gas conduits from said engine discharge the exhaust gases, the improvement comprising an outer after burner combustion chamber, an inner after burner combustion chamber, means for supporting the inner combustion chamber inside said outer combustion chamber, heat insulation means surrounding said outer combustion chamber, means for sealing said combustion chambers with respect to each other to substantially prevent intermixing of the exhaust gases present in the combustion chambers and separate conduit means for connecting said chambers to said engine, said conduit means being allocated to the individual engine cylinders so that the cylinders are distributed to the two combustion chambers in the sense of power tuning, whereby the exhaust gas currents flowing into the same after burner combustion chamber enter said chamber without interfering with each other.
Claim 5
Dependent Claim
43 words
The apparatus according to claim 1, further comprising collection conduit means upstream of each of said after burner combustion chambers, and means for discharging the exhaust gases of said engine through said collection conduit means into the respective one of said combustion chambers.
Claim 6
Dependent Claim
79 words
The apparatus according to claim 1, for use in a four cylinder four stroke in-line engine, comprising means for supplying the exhaust gases of the first and of the fourth cylinder of said engine to one of the combustion chambers and means for supplying the exhaust gases of the second and third cylinders of said engine to the other of the combustion chambers, whereby the exhaust gas currents fed into the same chamber are in phase with each other.
Claim 7
Dependent Claim
73 words
The apparatus according to claim 1, for use in combination with a six cylinder four stroke in-line engine comprising means for supplying the exhaust gases of three cylinders to one of the after burner combustion chambers and means for supplying the exhaust gases of the remaining three cylinders to the other after burner combustion chamber, whereby the exhaust gases of each group of three cylinders are combined in the sense of power tuning.
Claim 8
Dependent Claim
124 words
The apparatus according to claim 1, wherein the inner and outer combustion chambers comprise respective tubes of substantially longitudinal shape, means for closing the ends of said tubes, means for mounting said tube forming the inner combustion chamber inside said tube forming the outer combustion chamber, both of said tubes extending in substantially the same direction, said apparatus further comprising a conduit system for the exhaust gases, pipe fitting means extending through said closing means of the outer combustion chamber and into said inner combustion chamber for connecting said conduit system for the exhaust gases to said first chamber, and a connecting pipe fitting flanged to said closing means of said outer combustion chamber for connecting said conduit system to said outer combustion chamber.
Claim 9
Dependent Claim
18 words
The apparatus acCording to claim 5, wherein said tubes forming said combustion chambers have substantially round cross sections.
Claim 10
Dependent Claim
17 words
The apparatus according to claim 5, wherein said tubes forming said combustion chambers have oval cross sections.
Claim 11
Dependent Claim
44 words
The apparatus according to claim 5, wherein said pipe fitting means extending into said inner combustion chamber and the connecting pipe fitting means flanged to said outer combustion chamber extend from adjacent end walls of the combustion chambers and substantially parallel to each other.
Claim 12
Dependent Claim
45 words
The apparatus according to claim 5, wherein said pipe fitting means extending into said inner combustion chamber and the connecting pipe fitting means flanged to said outer combustion chamber extend from opposite end walls of the combustion chambers and substantially in parallel to each other.
Claim 13
Dependent Claim
55 words
The apparatus according to claim 1, wherein said inner combustion chamber extends over a portion of the length of said outer combustion chamber, and wherein said exhaust gas conduit means which discharge into said outer combustion chamber is positioned to discharge into that portion of said outer chamber which is free of said inner chamber.
Claim 14
Dependent Claim
72 words
The apparatus according to claim 10, wherein said exhaust gas conduit means comprises first and second pipe fittings for connecting the engine to said inner and outer combustion chambers, said apparatus further comprising exhaust pipe means connected to said inner chamber and extending outwardly through said outer chamber, at least one of said pipe fittings being positioned so that its discharge end points toward said exhaust pipe of said inner combustion chamber.
Claim 15
Dependent Claim
89 words
The apparatus according to claim 1, wherein said outer combustion chamber comprises a tube having closed ends, said exhaust gas conduit means comprising a first plurality of pipe fittings which exhaust into said inner combustion chamber and a second plurality of pipe fittings which exhaust into the outer combustion chamber, wherein all of said second plurality of pipe fittings are positioned at the level of a common generatrix of said tube, and wherein all of said first plurality of pipe fittings extends through said tube along said common generatrix.
Claim 16
Dependent Claim
71 words
The apparatus according to claim 1, wherein said inner and outer combustion chambers comprise inner and outer tubes respectively, said apparatus further comprising supporting brackets connected to the inner wall of said outer tube for supporting said inner tube inside the outer tube, said supporting brackets being attached to said inner tube intermediate the ends of said inner tube, whereby the free ends of said inner tube facilitate the heat expansion.
Claim 17
Dependent Claim
56 words
The apparatus according to claim 1, wherein said outer combustion chamber comprises two sheet metal casings and an insulating layer sandwiched therebetween, the inner of said sheet metal casings having corrugations extending thereabout perpendicularly to the longitudinal extension of said outer chamber for compensating heat tensions, especially different heat tensions in the inner and outer casing.
Claim 18
Dependent Claim
19 words
The apparatus according to claim 1, further comprising at least one glowing surface in each of said combustion chambers.
Claim 19
Dependent Claim
27 words
The apparatus according to claim 15, wherein the same glowing surface is arranged to be effective in the inner combustion chamber and in the outer combustion chamber.
Claim 20
Dependent Claim
48 words
The apparatus according to claim 15, wherein said conduit means have discharge end means inside said outer combustion chamber located in such position that the exhaust gases impinge upon said inner combustion chamber for heating a wall portion of said inner combustion chamber to provide said glowing surface.
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |