US3590578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Afterburner apparatus for engine exhaust gas
Assignee: Honda Motor Co Ltd
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Filing: 1969-09-15
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Granted: 1971-07-06
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Expires: 1989-09-15
Abstract
Abstract The exhaust pipes from the cylinders of an internal combustion engine lead to an afterburner chamber and thence to a muffler, and either a separate pipe or one of the exhaust pipes constitutes a bypass conduit leading from the afterburner chamber to the muffler. A control valve device regulates the flow through the exhaust pipes, with the exception of the bypass conduit, whereby the exhaust gases from the cylinders can flow directly therefrom to the muffler or can be diverted through the afterburner chamber and bypass conduit to the muffler. The valve device is closed when the engine is at low-power output and open when the engine is at high-power output.
Inventors
- 👤 Shizuo Yagi
- 👤 Akira Ishizuya
- 👤 Junji Otani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
An afterburner apparatus for the exhaust gases from respective cylinders of an internal combustion engine in combination with a muffler, said apparatus comprising an afterburner chamber, conduit mean joining said cylinders and said muffler and providing a first passage for exhaust gases directly from said cylinders to said muffler and a second passage in parallel with said first passage and leading through said afterburner chamber to said muffler, said first passage opening into said afterburner chamber, and valve means in said first passage between the afterburner chamber and the muffler for selectively opening and closing said first passage which also controls flow of exhaust gases from the first passage into the afterburner chamber and second passage, said conduit means comprising exhaust pipes extending from respective cylinders through said chamber, said pipes having apertures which open into said chamber.
Claim 2
Dependent Claim
138 words
An afterburner apparatus for the exhaust gases from respective cylinders of an internal combustion engine in combination with a muffler, said apparatus comprising an afterburner chamber, conduit mean joining said cylinders and said muffler and providing a first passage for exhaust gases directly from said cylinders to said muffler and a second passage in parallel with said first passage and leading through said afterburner chamber to said muffler, said first passage opening into said afterburner chamber, and valve means in said first passage between the afterburner chamber and the muffler for selectively opening and closing said first passage which also controls flow of exhaust gases from the first passage into the afterburner chamber and second passage, said conduit means comprising exhaust pipes extending from respective cylinders through said chamber, said pipes having apertures which open into said chamber.
Claim 3
Dependent Claim
23 words
Apparatus as claimed in claim 1 wherein said apertures in the pipes face in alternating directions within the chamber to avoid mutual interference.
Claim 4
Dependent Claim
48 words
Apparatus as claimed in claim 1 wherein said exhaust pipes form a common junction between said chamber and said muffler and said valve means comprises a single valve common to all the exhaust pipes, said second passage including a bypass conduit extending from said chamber to said muffler.
Claim 5
Dependent Claim
34 words
Apparatus as claimed in claim 1 wherein said valve means comprises a plurality of valves, one in each exhaust pipe, said second passage including a bypass conduit extending from said chamber to said muffler.
Claim 6
Dependent Claim
30 words
AppAratus as claimed in claim 1 wherein one of said exhaust pipes is a bypass conduit included in said second passage, the remaining exhaust pipes collectively defining said first passage.
Claim 7
Dependent Claim
20 words
Apparatus as claimed in claim 5 wherein said valve means comprises a single valve common to said remaining exhaust pipes.
Claim 8
Dependent Claim
21 words
Apparatus as claimed in claim 5 wherein said valve means comprises a separate valve in each of said remaining exhaust pipes.
Claim 9
Dependent Claim
51 words
Apparatus as claimed in claim 5 wherein at least one of said remaining pipes is joined with said bypass conduit at a juncture between the chamber and said muffler, said valve means comprising a separate valve in said at least one remaining pipe before the juncture thereof with said bypass conduit.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |