US5054457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water eliminating system for fuel injection system
Assignee: Yamaha Marine Co Ltd
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Filing: 1990-06-01
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Granted: 1991-10-08
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Expires: 2010-06-01
Abstract
Abstract A two cycle crankcase compression internal combustion engine including an air/fuel injector unit for injecting fuel and air into the engine. Compressed air is delivered to the fuel/air injector unit from an air compressor and a heat exchanger is provided in this line for cooling the air. The cooling is sufficient to cause condensation of any water vapor in the air and the condensate is drained from the system after the engine is stopped through an electrically operated valve. This valve also serves to reduce the pressure of the air in the system when the engine is stopped so that fuel and air will not be discharged if the fuel/air injector unit is removed when the engine is shut down for servicing.
Inventors
- 👤 Osamu Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:07
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F02B33/04; F02M; F02M67/00; F02M67/02; F02M69/00; F02M69/08; F02M69/10; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A fuel/air injector system for an internal combustion engine comprising a fuel/air injector unit communicating with said engine for delivering fuel and air thereto, a fuel source, means for delivering fuel from said fuel source to said injector unit, an air compressor for compressing air, and including means for cooling the compressed air in the means for delivering air from said air compressor to said injector unit.
Claim 2
Dependent Claim
67 words
A fuel/air injector system for an internal combustion engine comprising a fuel/air injector unit communicating with said engine for delivering fuel and air thereto, a fuel source, means for delivering fuel from said fuel source to said injector unit, an air compressor for compressing air, and including means for cooling the compressed air in the means for delivering air from said air compressor to said injector unit.
Claim 3
Dependent Claim
36 words
A fuel/air injector system for an internal combustion engine as set forth in claim 1 wherein the cooling means provides adequate cooling for condensing any water vapor contained within the air compressed by the air compressor.
Claim 4
Dependent Claim
29 words
A fuel/air injector system for an internal combustion engine as set forth in claim 2 further including valve drain means for draining condensed water vapor from the cooling means.
Claim 5
Dependent Claim
45 words
A fuel/air injector system for an internal combustion engine as set forth in claim 3 wherein the valve drain means is operated after the engine is shut off for draining the condensed water vapor without causing a reduction in air pressure during engine running conditions.
Claim 6
Dependent Claim
42 words
A fuel/air injector system for an internal combustion engine as set forth in claim 4 wherein the valve drain means further relieves the air pressure, in the system when the engine has been shut off and the valve drain means is opened.
Claim 7
Dependent Claim
26 words
A fuel/air injector system for an internal combustion engine as set forth in claim 2 wherein the condenser is cooled by liquid coolant of the engine.
Claim 8
Dependent Claim
25 words
A fuel/air injector system for an internal combustion engine as set forth in claim 6 wherein the engine coolant is circulated through the cooling means.
Claim 9
Dependent Claim
29 words
A fuel/air injector system for an internal combustion engine as set forth in claim 7 further including valve drain means for draining condensed water vapor from the cooling means.
Claim 10
Dependent Claim
44 words
A fuel/air injector system for an internal combustion engine as set forth in claim 8 wherein the valve drain means is operated after the engine shut off for draining the condensed water vapor without causing a reduction in air pressure during engine running conditions.
Claim 11
Dependent Claim
42 words
A fuel/air injector system for an internal combustion engine as set forth in claim 9 wherein the valve drain means further relieves the air pressure in the system when the engine has been shut off and the valve drain means is opened.
Claim 12
Dependent Claim
75 words
A fuel/air injector system for an internal combustion engine comprising a fuel/air injector unit communicating with said engine for delivering fuel and air thereto, a fuel source, means for delivering fuel from said fuel source to said injection unit, an air compressor for compressing air, means for delivering compressed air from said air compressor to said fuel/air injector unit, and means for relieving the air pressure in said system when the engine is not running.
Claim 13
Dependent Claim
75 words
A fuel/air injector system for an internal combustion engine comprising a fuel/air injector unit communicating with said engine for delivering fuel and air thereto, a fuel source, means for delivering fuel from said fuel source to said injection unit, an air compressor for compressing air, means for delivering compressed air from said air compressor to said fuel/air injector unit, and means for relieving the air pressure in said system when the engine is not running.
Claim 14
Dependent Claim
26 words
A fuel/air injector system for an internal combustion as set forth in claim 11 wherein the air pressure is relieved upon the stopping of the engine.
Claim 15
Dependent Claim
61 words
An internal combustion engine comprising an air compressor for delivering compressed air to said engine, means for cooling the air delivered from said air compressor to said engine, said cooling means providing adequate cooling for condensing any water vapor contained within the air compressed by said air compressor, and valve drain means for draining condensed water vapor from said cooling means.
Claim 16
Dependent Claim
61 words
An internal combustion engine comprising an air compressor for delivering compressed air to said engine, means for cooling the air delivered from said air compressor to said engine, said cooling means providing adequate cooling for condensing any water vapor contained within the air compressed by said air compressor, and valve drain means for draining condensed water vapor from said cooling means.
Claim 17
Dependent Claim
40 words
An internal combustion engine as set forth in claim 13 wherein the valve drain means is operated after the engine is shut off for draining the condensed water vapor without causing a reduction in air pressure during engine running conditions.
Claim 18
Dependent Claim
41 words
A fuel/air injector system for an internal combustion engine as set forth in claim 13 wherein the valve drain means further relieves the air pressure in the system when the engine has been shut off and the valve means is opened.
Claim 19
Dependent Claim
26 words
A fuel/air injector system for an internal combustion engine as set forth in claim 15 wherein the condenser is cooled by liquid coolant of the engine.
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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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |