US5375573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of two-stroke internal combustion engines
Assignee: Ford Motor Co
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Filing: 1993-09-09
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Granted: 1994-12-27
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Expires: 2013-09-09
Abstract
Abstract In a two-stroke engine having a pressurized air rail for producing an atomized fuel spray for injection into the individual combustion chambers, oil for lubrication is atomized by metering it into a stream of compressed air taken from the rail or a reservoir connected thereto and the resulting oil/air mist is injected into the crankcase and/or the lower part of the cylinder selectively and directly on to points requiring lubrication.
Inventors
- 👤 Timothy J. Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:01
CPC Classifications
F; F01; F01M; F01M3/00; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F16; F16N; F16N7/00; F16N7/30; F16N7/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A two-stroke engine having a pressurized air rail for producing an atomized fuel spray for injection into individual combustion chambers, in which oil for lubrication is atomized by metering said oil into a stream of compressed air taken from the rail or from a reservoir connected thereto and the resulting oil/air mist is injected into the crankcase directly upon points requiring lubrication.
Claim 2
Dependent Claim
62 words
A two-stroke engine having a pressurized air rail for producing an atomized fuel spray for injection into individual combustion chambers, in which oil for lubrication is atomized by metering said oil into a stream of compressed air taken from the rail or from a reservoir connected thereto and the resulting oil/air mist is injected into the crankcase directly upon points requiring lubrication.
Claim 3
Dependent Claim
53 words
A two-stroke engine according to claim 1, wherein each cylinder of the engine is provided with a plurality of lubricating nozzles directing the atomized oil locally to one or more of the small end bearing, the big end bearing and the area of the cylinder or cylinder liner contacted by the piston skirt.
Claim 4
Dependent Claim
21 words
A two-stroke engine according to claim 2 which also includes lubricating nozzles directing the atomized oil to the crankshaft main bearings.
Claim 5
Dependent Claim
17 words
A two-stroke engine according to claim 2, wherein the compressed air flows continuously through the lubricating nozzles.
Claim 6
Dependent Claim
27 words
A two-stroke engine according to claim 2, wherein the compressed air source for atomization of the oil is maintained at a pressure of at least 6 bar.
Claim 7
Dependent Claim
28 words
A two-stroke engine .according to claim 1, further comprising a supercharger, wherein the supply of compressed air for atomizing the oil is supplemented by compressed air from-the supercharger.
References Cited (Backward Citations)
US4637493A
Cited
FR2638204A1
Cited
EP0376130A2
Cited
US5103777A
Cited
US5113829A
Cited
WO1993008393A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |