US3670502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust gas separating devices
Assignee: Individual
•
Filing: 1970-03-06
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Granted: 1972-06-20
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Expires: 1990-03-06
Abstract
Abstract This invention provides means for separating the exhaust gas of an internal combustion engine into two streams, one a higher temperature stream relatively richer in oxides of nitrogen, the other a lower temperature stream relatively richer in unburned fuel components. This separation is made either by mechanically actuated valves, gas flow activated valves, or gas flow pressure differences.
Inventors
- 👤 Joseph C Firey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:07
CPC Classifications
F; F01; F01N; F01N3/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An exhaust gas flow separating device for a four-stroke-cycle internal combustion engine having an exhaust valve, an exhaust valve linkage and an intake valve linkage, comprising a valve element, for each cylinder of the engine, actuated by the exhaust valve linkage and the intake valve linkage in such a manner that said valve element is open, directing gas to a hotter gas manifold well before the engine exhaust valve starts to open, and that, as the engine exhaust valve starts to open, said valve element starts to close the hotter gas manifold and simultaneously to open gas flow to a cooler gas manifold, such closing and opening being completed at or before the time of widest opening of the engine exhaust valve.
Claim 2
Dependent Claim
122 words
An exhaust gas flow separating device for a four-stroke-cycle internal combustion engine having an exhaust valve, an exhaust valve linkage and an intake valve linkage, comprising a valve element, for each cylinder of the engine, actuated by the exhaust valve linkage and the intake valve linkage in such a manner that said valve element is open, directing gas to a hotter gas manifold well before the engine exhaust valve starts to open, and that, as the engine exhaust valve starts to open, said valve element starts to close the hotter gas manifold and simultaneously to open gas flow to a cooler gas manifold, such closing and opening being completed at or before the time of widest opening of the engine exhaust valve.
Claim 3
Dependent Claim
172 words
An exhaust gas flow separating device for a four-stroke-cycle internal combustion engine having an exhaust valve, an exhaust valve linkage and an intake valve linkage, to direct the hotter, first flowing exhaust gas portions into a hotter gas manifold and the cooler, later flowing exhaust gas portions into a cooler gas manifold, comprising a valve element for each cylinder of the engine, located in the engine exhaust manifold of each cylinder, said valve element being actuated by the intake valve linkage of that cylinder to connect the exhaust manifold of that cylinder to the hotter gas manifold by the opening action of the engine intake valve, and subsequently being actuated by the exhaust valve linkage of that cylinder to connect the exhaust manifold of that cylinder to the cooler gas manifold by the final opening action of the engine exhaust valve, the ports of said valve being so proportioned that the exhaust manifold is at all times connected either to the hotter gas manifold, or the cooler gas manifold, or to both.
Claim 4
Dependent Claim
172 words
An exhaust gas flow separating device for a four-stroke-cycle internal combustion engine having an exhaust valve, an exhaust valve linkage and an intake valve linkage, to direct the hotter, first flowing exhaust gas portions into a hotter gas manifold and the cooler, later flowing exhaust gas portions into a cooler gas manifold, comprising a valve element for each cylinder of the engine, located in the engine exhaust manifold of each cylinder, said valve element being actuated by the intake valve linkage of that cylinder to connect the exhaust manifold of that cylinder to the hotter gas manifold by the opening action of the engine intake valve, and subsequently being actuated by the exhaust valve linkage of that cylinder to connect the exhaust manifold of that cylinder to the cooler gas manifold by the final opening action of the engine exhaust valve, the ports of said valve being so proportioned that the exhaust manifold is at all times connected either to the hotter gas manifold, or the cooler gas manifold, or to both.
References Cited (Backward Citations)
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |