US3581719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic exhaust recirculator for two stroke cycle engines
Assignee: Old Carco LLC
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Filing: 1969-10-30
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Granted: 1971-06-01
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Expires: 1989-10-30
Abstract
Abstract A fluidic element connected to the exhaust of a two cycle engine for recirculating fuel-rich exhaust portions to the combustion chamber.
Inventors
- 👤 Leonard P Gau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:35
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; F02; F02M; F02M26/00; F02M26/13; F02M26/37; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
In an internal combustion engine, a combustion chamber; fuel inlet means and exhaust outlet means associated with said combustion chamber; fluid logic switch means connected to said exhaust outlet means, said switch means comprising an input conduit arranged to receive exhaust gases from said outlet means, first and second output conduits connected to said input conduit, said first output conduit communicating with the atmosphere, and first and second oppositely disposed control ports connected to said input conduit upstream with respect to said outputs for selectively directing exhaust gas into said said output conduits and recirculating means connected to said second output conduit for recirculating exhaust gases passing therethrough to said combustion chamber.
Claim 2
Dependent Claim
112 words
In an internal combustion engine, a combustion chamber; fuel inlet means and exhaust outlet means associated with said combustion chamber; fluid logic switch means connected to said exhaust outlet means, said switch means comprising an input conduit arranged to receive exhaust gases from said outlet means, first and second output conduits connected to said input conduit, said first output conduit communicating with the atmosphere, and first and second oppositely disposed control ports connected to said input conduit upstream with respect to said outputs for selectively directing exhaust gas into said said output conduits and recirculating means connected to said second output conduit for recirculating exhaust gases passing therethrough to said combustion chamber.
Claim 3
Dependent Claim
29 words
The combination of claim 1 including means for regulating fluid pressure at said control ports whereby exhaust gases may be selectively directed between said first and second output conduits.
Claim 4
Dependent Claim
32 words
The combination of claim 1 including means associated with said regulating means and synchronized with engine operation whereby said fluidic switch means may divert normal exhaust gases and recirculate fuel-rich portions thereof.
Claim 5
Dependent Claim
13 words
The combination of claim 1 wherein said fluidic switch is a bistable element.
Claim 6
Dependent Claim
51 words
The combination of claim 4 wherein said fluidic switch includes at least one vent port positioned between said control ports and said output conduits, delay path means connected between said vent port and one of said control ports and a bias source means connected to the other of said control ports.
Claim 7
Dependent Claim
13 words
The combination of claim 1 wherein said fluidic switch is a monostable element.
Claim 8
Dependent Claim
76 words
The combination of claim 1 wherein said engine includes fuel mixture inlet means and a recirculating exhaust inlet means communicating with the engine crankcase, means for cyclically opening and closing both of said inlet means during engine operation, one of said control ports is connected to said fuel mixture inlet means, said second output conduit is connected to said exhaust inlet means and said crankcase is adapted to transfer fuel contained therein to said combustion chamber.
Claim 9
Dependent Claim
15 words
The combination of claim 7 wherein said other control port is open to the atmosphere.
Claim 10
Dependent Claim
23 words
The combination of claim 7 wherein said means for opening and closing said inlet means comprises a pair of normally closed reed valves.
Claim 11
Dependent Claim
15 words
The combination of claim 7 including a diode muffler connected to said first output conduit.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |