US5121719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start boosting device for internal combustion engine
Assignee: Yamaha Marine Co Ltd
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Filing: 1991-03-18
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Granted: 1992-06-16
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Expires: 2011-03-18
Abstract
Abstract A number of embodiments of outboard motors incorporating fuel and air enrichment devices in which fuel is supplied to the engine for enrichment under pressure by a pump and additional air is also supplied to the engine induction system at least at atmospheric pressure. In some embodiments, the air is mixed with the fuel and is pressurized. The fuel and air flow are both controlled by a common valve member that may be operated either by a solenoid or a heated wax pellet.
Inventors
- 👤 Masaki Okazaki
- 👤 Hiroaki Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10242; F02M35/10308; F02B; F02B61/00; F02B61/04; F02B61/045; F02M1/00; F02M1/16; F02M35/1015; F02M35/1019; F02M35/10275; F02M35/16; F02M35/165; F02M35/167
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
93 words
An enrichment system for an internal combustion engine having an induction system, a charge forming device for supplying a fuel/air mixture to said induction system, means including first control valve means for selectively supplying enrichment fuel to said induction system at a pressure greater than atmospheric, and means including second control valve means for supplying enrichment air to said induction system at at least atmospheric pressure in response to the supply of enrichment fuel, said first and said second control valve means comprising a common member for controlling both fuel and air flow.
Claim 2
Dependent Claim
93 words
An enrichment system for an internal combustion engine having an induction system, a charge forming device for supplying a fuel/air mixture to said induction system, means including first control valve means for selectively supplying enrichment fuel to said induction system at a pressure greater than atmospheric, and means including second control valve means for supplying enrichment air to said induction system at at least atmospheric pressure in response to the supply of enrichment fuel, said first and said second control valve means comprising a common member for controlling both fuel and air flow.
Claim 3
Dependent Claim
33 words
An enrichment system as set forth in claim 1 wherein the means for supplying enrichment fuel further includes pumping means separate from the charge forming device for pumping the fuel to the engine.
Claim 4
Dependent Claim
21 words
An enrichment system as set forth in claim 2 wherein the fuel for enrichment is supplied from the charge forming means.
Claim 5
Dependent Claim
22 words
An enrichment system as set forth in claim 3 wherein the control valve means are both opened on starting of the engine.
Claim 6
Dependent Claim
21 words
An enrichment system as set forth in claim 3 wherein the control valve means are both opened upon low temperature running.
Claim 7
Dependent Claim
26 words
An enrichment system as set forth in claim 5 wherein the control valve means are both closed after the engine has run for a time period.
Claim 8
Dependent Claim
22 words
An enrichment system as set forth in claim 1 further including means for pressuring the air delivered to the engine for enrichment.
Claim 9
Dependent Claim
34 words
An enrichment system as set forth in claim 7 wherein the enrichment air is mixed with the pressurized fuel in a jet pumping device for pressurization of the air by the pressurized fuel flow.
Claim 10
Dependent Claim
30 words
An enrichment system as set forth in claim 1 wherein the enrichment air is supplied to an area in the induction system that is at a lower than atmospheric pressure.
Claim 11
Dependent Claim
16 words
An enrichment system as set forth in claim 1 wherein the common member is solenoid operated.
Claim 12
Dependent Claim
45 words
An enrichment system as set forth in claim 1 wherein the common member is normally maintained in an opened position and is closed by a heating device that supplies heat when the engine is switched on for closing the valve after a predetermined time period.
Claim 13
Dependent Claim
85 words
An enrichment system for an internal combustion engine having an induction system, a charge forming device for supplying fuel/air mixture to said induction system, pumping means for pumping fuel under pressure, means including first control valve means for selectively supplying a pressurized flow of said pumped fuel to said induction system at a pressure greater than atmospheric, and means including second control valve means for supplying enrichment air for mixture with the pressurized fuel and delivery to said induction system at at least atmospheric pressure.
Claim 14
Dependent Claim
85 words
An enrichment system for an internal combustion engine having an induction system, a charge forming device for supplying fuel/air mixture to said induction system, pumping means for pumping fuel under pressure, means including first control valve means for selectively supplying a pressurized flow of said pumped fuel to said induction system at a pressure greater than atmospheric, and means including second control valve means for supplying enrichment air for mixture with the pressurized fuel and delivery to said induction system at at least atmospheric pressure.
Claim 15
Dependent Claim
21 words
An enrichment system as set forth in claim 12 wherein the fuel for enrichment is supplied from the charge forming means.
Claim 16
Dependent Claim
20 words
An enrichment system as set forth in claim 13 wherein the enrichment fuel is supplied on starting of the engine.
Claim 17
Dependent Claim
19 words
An enrichment system as set forth in claim 13 wherein the enrichment fuel is supplied for low temperature running.
Claim 18
Dependent Claim
25 words
An enrichment system as set forth in claim 15 wherein the enrichment fuel supply is stopped after the engine has run for a time period.
Claim 19
Dependent Claim
23 words
An enrichment system as set forth in claim 12 wherein the enrichment air is mixed with the fuel in a jet pumping device.
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) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |