US3788283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fuel system
Assignee: Motors Liquidation Co
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Filing: 1972-10-27
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Granted: 1974-01-29
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Expires: 1992-10-27
Abstract
Abstract A dual fuel system for an internal combustion engine having a carburetor supplied with high volatility fuel for engine starting and then with regular fuel for continued normal engine operation, an on board still being used to distill the high volatility fuel from the regular fuel during engine operation, the thus distilled fuel being stored for use during the next engine start-up.
Inventors
- 👤 J Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:06
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/16; F02M1/165; F02M33/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
323 words
A dual fuel system for an internal combustion engine having a cooling system containing coolant fluid heated during engine operation and a fuel induction system including a carburetor having a float bowl, said dual fuel system including a fuel reservoir for regular fuel, valve means having a first inlet, a second inlet and a discharge port, a conduit connecting said discharge port of said valve means to the float bowl of the carburetor, a distillation unit including a condenser tube housing having cooling fins on the exterior thereof, a fuel evaporation unit, having an outer, helical fuel flow path, positioned in the upper end of said condenser tube housing and spaced from the bottom thereof to provide a reservoir for a distillate therein, an undistilled fuel collecting means positioned in said condenser tube housing beneath said fuel evaporation unit for collecting undistilled fuel flowing from said fuel evoparation unit, first conduit means including a first pump means connecting said fuel reservoir to said first inlet of said valve means and to said fuel evaporation unit to supply fuel to said helical fuel flow path, second conduit means including a second pump means connected to said condenser tube housing in fluid flow communication with said distillate reservoir and to said second inlet of said valve means, third conduit means connecting said undistilled fluid collecting means to said fuel reservoir, passage means in said fuel evaporation unit for the circulation of coolant fluid therein in heat exchange relationship to said helical fuel flow path, conduit means connecting the cooling system of the engine to said passage means for recirculation of coolant fluid through said passage means, and temperature sensing control means operatively connected to said first pump means and said second pump means positioned in thermal relationship to the coolant fluid in the cooling system to selectively effect operation of said first pump means and said second pump means as a function of coolant temperature.
Claim 2
Dependent Claim
323 words
A dual fuel system for an internal combustion engine having a cooling system containing coolant fluid heated during engine operation and a fuel induction system including a carburetor having a float bowl, said dual fuel system including a fuel reservoir for regular fuel, valve means having a first inlet, a second inlet and a discharge port, a conduit connecting said discharge port of said valve means to the float bowl of the carburetor, a distillation unit including a condenser tube housing having cooling fins on the exterior thereof, a fuel evaporation unit, having an outer, helical fuel flow path, positioned in the upper end of said condenser tube housing and spaced from the bottom thereof to provide a reservoir for a distillate therein, an undistilled fuel collecting means positioned in said condenser tube housing beneath said fuel evaporation unit for collecting undistilled fuel flowing from said fuel evoparation unit, first conduit means including a first pump means connecting said fuel reservoir to said first inlet of said valve means and to said fuel evaporation unit to supply fuel to said helical fuel flow path, second conduit means including a second pump means connected to said condenser tube housing in fluid flow communication with said distillate reservoir and to said second inlet of said valve means, third conduit means connecting said undistilled fluid collecting means to said fuel reservoir, passage means in said fuel evaporation unit for the circulation of coolant fluid therein in heat exchange relationship to said helical fuel flow path, conduit means connecting the cooling system of the engine to said passage means for recirculation of coolant fluid through said passage means, and temperature sensing control means operatively connected to said first pump means and said second pump means positioned in thermal relationship to the coolant fluid in the cooling system to selectively effect operation of said first pump means and said second pump means as a function of coolant temperature.
Claim 3
Dependent Claim
85 words
A dual fuel system accordinG to claim 1 further including float bowl drain means having a drain conduit means connected at one end to the float bowl of the carburetor for draining fuel therefrom and connected at its opposite end to said third conduit means, and hydraulic controlled valve means positioned in said drain conduit means and operatively connected in fluid communication with said conduit and operative to prevent flow through said drain conduit means when fuel under pressure is being pumped through said conduit.
Claim 4
Dependent Claim
74 words
A dual fuel system according to claim 1 further including a distillate level sensing means operatively positioned in said distillate reservoir of said condenser tube housing and, valve means positioned in said first conduit means and operatively connected to said distillate level sensing means to control the flow of fuel to said fuel evaporation means as a function of the level of distillate in said reservoir as sensed by said distillate level sensing means.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |