US3986486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of hydrocarbons emissions in carbureted engines
Assignee: Individual
•
Filing: 1974-10-21
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Granted: 1976-10-19
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Expires: 1994-10-21
Abstract
Abstract A device for attachment to a carbureted automobile engine for improving its performance, both by reduction of pollutants by obtaining more complete burning of the fuel and by obtaining better gasoline mileage, especially in city and other stop-start driving. The fuel is passed into a heat exchanger between the fuel pump and the carburetor. The heat exchange utilizes the water pump and water from the radiator in conjunction with a heat sensor located close to the carburetor to feed the gasoline to the carburetor at temperatures depending on the prevailing weather and climate, i.e., at about 110° to 120°F. in winter in northern California and about 125° to 145°F. in the summer there. The temperature is kept within a range of 5°-6°F. A pressure regulator is interposed between the heat exchanger and the heat sensor for regulating the pressure of the fuel fed to the carburetor, so that it will be about 3 pounds per square inch.
Inventors
- 👤 Clare P. Rabbiosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:49
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
Apparatus for improving the efficiency of an automobile or truck engine and for reducing hydrocarbons in the exhaust, said engine having a fuel pump and a fuel line, a carburetor connected to said fuel line, and a water cooling system for cooling the engine, including in combination: a heat exchanger connected in between said fuel pump and said carburetor for heating the fuel in said fuel line, and having an inlet and outlet for liquid from said water cooling system to supply the heat, a heat sensor connected to said fuel line closely adjacent said carburetor for sensing fuel temperature, an electric switch actuated by said heat sensor, opened thereby at a predetermined upper temperature and closed when the temperature drops below a predetermined lower temperature, a valve interposed between said water cooling system and said heat exchanger and actuated by closure of said switch to enable liquid flow when the temperature at said sensor is below a predetermined value and to cut off flow of said liquid when the temperature of said sensor rises above a higher predetermined value, and a pressure regulator between said heat exchanger and said carburetor for holding the pressure of fuel entering said carburetor at about three p.s.i.
Claim 2
Dependent Claim
204 words
Apparatus for improving the efficiency of an automobile or truck engine and for reducing hydrocarbons in the exhaust, said engine having a fuel pump and a fuel line, a carburetor connected to said fuel line, and a water cooling system for cooling the engine, including in combination: a heat exchanger connected in between said fuel pump and said carburetor for heating the fuel in said fuel line, and having an inlet and outlet for liquid from said water cooling system to supply the heat, a heat sensor connected to said fuel line closely adjacent said carburetor for sensing fuel temperature, an electric switch actuated by said heat sensor, opened thereby at a predetermined upper temperature and closed when the temperature drops below a predetermined lower temperature, a valve interposed between said water cooling system and said heat exchanger and actuated by closure of said switch to enable liquid flow when the temperature at said sensor is below a predetermined value and to cut off flow of said liquid when the temperature of said sensor rises above a higher predetermined value, and a pressure regulator between said heat exchanger and said carburetor for holding the pressure of fuel entering said carburetor at about three p.s.i.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said heat exchanger is located, relative to said engine, in a location where it can be cooled by air from exterior to said engine.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 wherein said electric switch is capable of manual adjustment to provide any fuel temperature between 110° and 145° F. at said heat sensor.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |