Patent US3913323A successfully refreshed from Google Patents.
US3913323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for treatment of exhaust gases from an internal combustion engine
Assignee: Individual
•
Filing: 1973-03-22
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Granted: 1975-10-21
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Expires: 1993-03-22
Abstract
Abstract A device for the treatment of exhaust gases from an internal combustion engine in which the exhaust gas is passed through a first bed of catalytic material which reduces nitrous oxides and is then supplied to a main flow channel which takes the form of a thermal reactor and which is surrounded by a bed of catalytic material in which carbon monoxide and hydrocarbon are oxidized. A control valve in the main flow channel is adjustable to control the share of the gas leaving the first bed of catalytic material which passes through the second bed of catalytic material. Additional air is supplied to the stream of exhaust gases, especially in the region immediately downstream of the first bed of catalytic material.
Inventors
- 👤 Paul August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:26
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2882; F01N13/00; F01N13/009; F01N13/011; F01N13/017; F01N3/18; F01N3/20; F01N3/2053; F01N3/22; F01N3/2839; F01N3/2846; F01N3/2892; F01N3/30; F01N2240/00; F01N2240/12; F01N2250/00; F01N2250/04; F01N2410/00; F01N2410/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
264 words
A device for the treatment of internal combustion exhaust gases comprising: a First chamber having an upstream end and a downstream end and containing catalytic material for the reduction of nitrous oxide through which all of the exhaust gases flow; a main flow channel member having an upstream end and a downstream end; a second catalyst containing chamber surrounding said main flow channel member having a plurality of ports communicating therewith and a downstream outlet remote from said ports; a connection piece in the form of a pipe having one end connected to the downstream end of said first chamber and the other end connected to the upstream end of said channel member; a plurality of mixing devices mounted on the inside wall of the connection piece pipe for admixing gases passing through the pipe; first means for supplying air to the exhaust gases near the upstream end of the connection piece pipe including at least one pipe extending transversely to said connection piece pipe for a distance at least as great as the diameter of the connection piece pipe, ports in the downstream side of the at least one pipe, and means for supplying air to the at least one pipe; and a butterfly type control valve in said main flow channel member with the plurality of ports in the main flow channel member disposed between the control valve and the channel member upstream end for distributing the flow of exhaust gases between the main flow channel member and the second catalyst containing chamber in percentages in accordance with particular control valve positions.
Claim 2
Independent Claim
264 words
A device for the treatment of internal combustion exhaust gases comprising: a First chamber having an upstream end and a downstream end and containing catalytic material for the reduction of nitrous oxide through which all of the exhaust gases flow; a main flow channel member having an upstream end and a downstream end; a second catalyst containing chamber surrounding said main flow channel member having a plurality of ports communicating therewith and a downstream outlet remote from said ports; a connection piece in the form of a pipe having one end connected to the downstream end of said first chamber and the other end connected to the upstream end of said channel member; a plurality of mixing devices mounted on the inside wall of the connection piece pipe for admixing gases passing through the pipe; first means for supplying air to the exhaust gases near the upstream end of the connection piece pipe including at least one pipe extending transversely to said connection piece pipe for a distance at least as great as the diameter of the connection piece pipe, ports in the downstream side of the at least one pipe, and means for supplying air to the at least one pipe; and a butterfly type control valve in said main flow channel member with the plurality of ports in the main flow channel member disposed between the control valve and the channel member upstream end for distributing the flow of exhaust gases between the main flow channel member and the second catalyst containing chamber in percentages in accordance with particular control valve positions.
Claim 3
Dependent Claim
26 words
A device according to claim 1 in which said connection piece is a pipe as large in diameter as the inlet end of said first chamber.
Claim 4
Dependent Claim
18 words
A device according to claim 1 in which said connection piece is at least about 20 centimeters long.
Claim 5
Dependent Claim
43 words
A device according to claim 1 in which said first chamber has an inlet member adapted for connection to an engine manifold and an outlet member connected to said connection piece and has the entire transverse inside area thereof filled with catalytic material.
Claim 6
Dependent Claim
21 words
A device according to claim 1 which includes second means for supplying air to the upstream end of said first chamber.
Claim 7
Dependent Claim
48 words
A device according to claim 5 which includes control means for controlling the supply of air to said first and second means and operable for reducing the supply of air to said first means while simultaneously increasing the supply of air to said second means and vice versa.
Claim 8
Dependent Claim
36 words
A device according to claim 6 in which said control means provide for a predetermined minimum supply of air to said first means when the supply of air to said second means is at a maximum.
Claim 9
Dependent Claim
36 words
A device according to claim 6 in which said control means provide for a predetermined minimum supply of air to said second means when the supply of air to said first means is at a maximum.
Claim 10
Dependent Claim
28 words
A device according to claim 1 which includes means under the control of the throttle of the engine for controlling the supply of air to said first means.
Claim 11
Dependent Claim
38 words
A device according to claim 1 which includes turbulence creating and heat exchange elements on the inside wall of said channel member, the outside wall of said channel member forming the radially inner wall of said second chamber.
Claim 12
Dependent Claim
42 words
A device according to claim 1 in which the downstream end of said channel member and the downstream end of said second chamber are substantially coextensive and taper inwardly, the downstream end of said second chamber being connected to an exhaust pipe.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |