Patent US4962745A successfully refreshed from Google Patents.
US4962745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply device of an engine
Assignee: Toyota Motor Corp
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Filing: 1989-09-27
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Granted: 1990-10-16
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Expires: 2009-09-27
Abstract
Abstract A fuel supply device comprising an air compressor for supplying pressurized air to an air blast valve via a pressurized air passage, an oil supply device for supplying oil in an engine crankcase to the compressor, and an oil separator arranged in the pressurized air supply passage to separate oil from pressurized air discharged from the air compressor and return the thus-separated oil to the engine crankcase.
Inventors
- 👤 Eishi Ohno
- 👤 Norihiko Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:57
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/02; F01; F01M; F01M11/00; F01M11/08; F02B; F02B39/00; F02B39/14; F02M67/00; F02M67/02; F02M67/10; F02M67/12; F02M69/00; F02M69/08; F01M13/00; F01M2013/0005; F01M13/02; F01M13/021; F01M2013/027
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
179 words
A fuel supply device of an engine having a crankcase, comprising: an air blast valve for injecting fuel by pressurized air; an air compressor for supplying pressurized air to said air blast valve via a pressurized air supply passage; an oil supply means for supplying oil in the engine crankcase to said air compressor to lubricate said air compressor; an oil separator arranged in said pressurized air supply passage to separate oil from pressurized air discharged from said air compressor and return said thus-separated oil to the engine crankcase via a return passage; and a pressure regulator arranged in said return passage for discharging pressurized air and separated oil to said crankcase when a pressure in said pressurized air supply passage becomes higher than a predetermined pressure and for stopping the discharge of pressurized air and separated oil to said crankcase when said pressure in said pressurized air supply passage becomes lower than said predetermined pressure, to keep said pressure in said pressurized air supply passage at a constant value and to discharge said separated oil to said crankcase.
Claim 2
Dependent Claim
179 words
A fuel supply device of an engine having a crankcase, comprising: an air blast valve for injecting fuel by pressurized air; an air compressor for supplying pressurized air to said air blast valve via a pressurized air supply passage; an oil supply means for supplying oil in the engine crankcase to said air compressor to lubricate said air compressor; an oil separator arranged in said pressurized air supply passage to separate oil from pressurized air discharged from said air compressor and return said thus-separated oil to the engine crankcase via a return passage; and a pressure regulator arranged in said return passage for discharging pressurized air and separated oil to said crankcase when a pressure in said pressurized air supply passage becomes higher than a predetermined pressure and for stopping the discharge of pressurized air and separated oil to said crankcase when said pressure in said pressurized air supply passage becomes lower than said predetermined pressure, to keep said pressure in said pressurized air supply passage at a constant value and to discharge said separated oil to said crankcase.
Claim 3
Dependent Claim
22 words
A fuel supply device according to claim 1, wherein said oil separator separates oil together with a part of said pressurized air.
Claim 4
Dependent Claim
33 words
A fuel supply device according to claim 2, wherein said oil separator comprises a porous ceramic layer for separating oil from pressurized air passing through said ceramic layer toward said air blast valve.
Claim 5
Dependent Claim
92 words
A fuel supply device according to claim 3, wherein said oil separator comprises an inlet port for introducing pressurized air into said oil separator, an outlet port for allowing a flow of pressurized air out of said oil separator to said air blast valve, and a drain port for draining separated oil and a part of said pressurized air, said ceramic layer being arranged between said inlet port and said outlet port, and said drain port being located on a same side as said inlet port with respect to said ceramic layer.
Claim 6
Dependent Claim
28 words
A fuel supply device according to claim 2, further comprising an additional oil separator arranged in said pressurized air supply passage to separate oil from said pressurized air.
Claim 7
Dependent Claim
23 words
A fuel supply device according to claim 5, wherein said additional oil separator is arranged between said air compressor and said oil separator.
Claim 8
Dependent Claim
44 words
A fuel supply device according to claim 6, wherein said additional oil separator separates only oil from said pressurized air, and said oil separated by said additional oil separator is returned to the engine crankcase from a drain port of said additional oil separator.
Claim 9
Dependent Claim
25 words
A fuel supply device according to claim 7, wherein said additional oil separator intermittently drains separated oil to return said separated oil to the crankcase.
Claim 10
Dependent Claim
28 words
A fuel supply device according to claim 8, wherein said additional oil separator drains said separated oil when an amount of said separated oil reaches a predetermined amount.
Claim 11
Dependent Claim
85 words
A fuel supply device according to claim 9, wherein said additional oil separator comprises a float chamber for collecting separated oil, a float arranged in said float chamber, and a valve arranged in an oil passage connecting said float chamber and said drain port, and said valve is controlled by said float so that said valve is opened when the amount of separated oil collected in said float chamber reaches a predetermined amount and an amount of displacement of said float reaches a predetermined value.
Claim 12
Dependent Claim
18 words
A fuel supply device according to claim 5, wherein said additional oil separator separates oil by centrifugal separation.
Claim 13
Dependent Claim
23 words
A fuel supply device according to claim 1, wherein said oil supply means supplies oil to a suction passage of said air compressor.
Claim 14
Dependent Claim
18 words
A fuel supply device according to claim 1, wherein said oil supply means comprises an electric oil injector.
Claim 15
Dependent Claim
17 words
A fuel supply device according to claim 1, wherein said air compressor is driven by the engine.
Claim 16
Dependent Claim
28 words
A fuel supply device according to claim 14, wherein said oil supply means increases an amount of oil supplied in accordance with an increase of an engine speed.
Claim 17
Dependent Claim
17 words
A fuel supply device according to claim 1, wherein said air compressor is a vane type compressor.
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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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |