US4638771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system for two-cycle internal combustion engine
Assignee: Yamaha Marine Co Ltd
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Filing: 1986-05-27
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Granted: 1987-01-27
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Expires: 2006-05-27
Abstract
Abstract A lubricating system for a two-cycle internal combustion engine of an outboard motor wherein lubricant is mixed with fuel before delivery to the charge formers of the engine. The amount of lubricant mixed with the fuel is varied in predetermined steps in response to the amount of fuel consumed by the engine.
Inventors
- 👤 Atsushi Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/04; F02B61/045; F01; F01M; F01M3/00; F01M3/02; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
78 words
In a lubricating system for a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine, the improvement comprising means for measuring the amount of fuel supplied to said charge forming device and means for supplying lubricant to said engine lubricating system at a rate determined only by the measured amount of fuel supplied.
Claim 2
Dependent Claim
78 words
In a lubricating system for a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine, the improvement comprising means for measuring the amount of fuel supplied to said charge forming device and means for supplying lubricant to said engine lubricating system at a rate determined only by the measured amount of fuel supplied.
Claim 3
Dependent Claim
38 words
In a lubricating system as set forth in claim 1 wherein the ratio of lubricant supplied in response to the rate of fuel consumption is mapped to provide different ratios of lubricant fuel mixture at varying fuel consumptions.
Claim 4
Dependent Claim
106 words
In a lubricating system for a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine, the improvement comprising means for sensing the rate of fuel consumption and means for supplying lubricant to said engine lubricating system at a rate determined only by the sensed rate of fuel consumption, the ratio of lubricant supplied in response to the rate of fuel consumption being mapped to provide different ratios of lubricant fuel mixture at varying fuel consumption, ratios being varied in stepped ranges.
Claim 5
Dependent Claim
106 words
In a lubricating system for a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine, the improvement comprising means for sensing the rate of fuel consumption and means for supplying lubricant to said engine lubricating system at a rate determined only by the sensed rate of fuel consumption, the ratio of lubricant supplied in response to the rate of fuel consumption being mapped to provide different ratios of lubricant fuel mixture at varying fuel consumption, ratios being varied in stepped ranges.
Claim 6
Dependent Claim
22 words
In a lubricating system as set forth in claim 3 wherein the lubricant flow is controlled by providing a variable lubricant pump.
Claim 7
Dependent Claim
30 words
In a lubricating system as set forth in claim 4 wherein the lubricating system includes means for mixing the lubricant with the fuel before delivery to the charge forming means.
Claim 8
Dependent Claim
22 words
In a lubricating system as set forth in claim 1 wherein the lubricant flow is controlled by providing a variable lubricant pump.
Claim 9
Dependent Claim
30 words
In a lubricating system as set forth in claim 6 wherein the lubricating system includes means for mixing the lubricant with the fuel before delivery to the charge forming means.
Claim 10
Independent Claim
69 words
A method of lubricating a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine comrpising the step of measuring the rate of fuel consumption and supply lubricant to the engine lubricating system at a rate determined only by the measured rate of fuel consumption.
Claim 11
Independent Claim
69 words
A method of lubricating a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine comrpising the step of measuring the rate of fuel consumption and supply lubricant to the engine lubricating system at a rate determined only by the measured rate of fuel consumption.
Claim 12
Dependent Claim
37 words
In a method as set forth in claim 8 wherein the ratio of lubricant supplied in response to the rate of fuel consumption is mapped to provide different ratios of lubricant fuel mixture at varying fuel consumptions.
Claim 13
Dependent Claim
104 words
In a method of lubricating a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine comprising the step of measuring the rate of fuel consumption and supplying lubricant to the engine lubricating system at a rate determined only by the measured rate of fuel consumption, the ratio of lubricant supplied in response to the rate of fuel consumption being mapped to provide different ratios of lubricant fuel mixture at varying fuel consumptions, the ratios being varied in stepped ranges.
Claim 14
Dependent Claim
104 words
In a method of lubricating a two-cycle internal combustion engine having a fuel feed system including charge forming means and means for delivering fuel from a fuel source to said charge forming means and a lubricant system for the engine comprising the step of measuring the rate of fuel consumption and supplying lubricant to the engine lubricating system at a rate determined only by the measured rate of fuel consumption, the ratio of lubricant supplied in response to the rate of fuel consumption being mapped to provide different ratios of lubricant fuel mixture at varying fuel consumptions, the ratios being varied in stepped ranges.
Claim 15
Dependent Claim
21 words
In a method as set forth in claim 10 wherein the lubricant flow is controlled by providing a variable lubricant pump.
Claim 16
Dependent Claim
35 words
In a lubricating system as set forth in claim 5 wherein the means for mixing lubricant with the fuel mixes lubricant with the fuel downstream of the means for sensing the rate of fuel consumption.
Claim 17
Dependent Claim
35 words
In a lubricating system as set forth in claim 7 wherein the means for mixing lubricant with the fuel mixes lubricant with the fuel downstream of the means for sensing the rate of fuel consumption.
Claim 18
Dependent Claim
31 words
A method as set forth in claim 8 wherein the lubricant is added to the fuel supply for lubricating the engine downstream of the point where the fuel consumption is measured.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |