US3713429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel economizer system for a gasoline engine
Assignee: Individual
•
Filing: 1971-11-05
•
Granted: 1973-01-30
•
Expires: 1991-11-05
Abstract
Abstract A fuel economizer system for a gasoline engine. A heat sensor in the engine exhaust line controls valves in the normal intake and fuel supply conduits to cause them to close as the engine warms up. A mixture of gasoline vapor and air is supplied to the carburetor from an auxiliary tank supplied with gasoline from the main supply line through a replenishing float valve in the auxiliary tank. The gasoline in the auxiliary tank is heated by a jacket supplied with hot fluid heated by the engine. Air is injected into the gasoline through a multiple-hole terminal nozzle immersed in the gasoline, acting as an agitator, creating a gas-and-air vapor mixture in the upper portion of the auxiliary tank. The air is furnished to the nozzle through a conduit provided with an intake filter.
Inventors
- 👤 J Dwyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
F; F02; F02M; F02M17/00; F02M17/18; F02M17/20; F02M17/22; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F02D9/00; F02B; F02B1/00; F02B1/02; F02B1/04; F02D2700/00; F02D2700/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
211 words
In combination with an internal combustion engine having a carburetor, air intake means, an air supply conduit connecting said air intake means to said carburetor, a liquid fuel supply line, and a liquid fuel supply conduit connecting said supply line to said carburetor, normally open first valve means in said air intake means, normally open second valve means in said liquid fuel supply conduit, means to operate said first and second valve means towards closure responsive to a rise in engine temperature, an auxiliary tank, conduit means connecting said liquid fuel supply line to said auxiliary tank, means to maintain a predetermined liquid fuel level in said auxiliary tank, a heat exchange chamber in said auxiliary tank below said level so as to be immersed in the liquid fuel in said tank, means to circulate hot fluid from the engine through said chamber, an apertured nozzle in said tank located below said predetermined liquid level, air intake means connected to said nozzle extending outside the tank, whereby outside air can be admitted and be discharged through said nozzle to agitate the liquid fuel and form a fuel vapor and air mixture in the upper space in the tank, and conduit means connecting said upper space to said first-named air supply conduit.
Claim 2
Dependent Claim
211 words
In combination with an internal combustion engine having a carburetor, air intake means, an air supply conduit connecting said air intake means to said carburetor, a liquid fuel supply line, and a liquid fuel supply conduit connecting said supply line to said carburetor, normally open first valve means in said air intake means, normally open second valve means in said liquid fuel supply conduit, means to operate said first and second valve means towards closure responsive to a rise in engine temperature, an auxiliary tank, conduit means connecting said liquid fuel supply line to said auxiliary tank, means to maintain a predetermined liquid fuel level in said auxiliary tank, a heat exchange chamber in said auxiliary tank below said level so as to be immersed in the liquid fuel in said tank, means to circulate hot fluid from the engine through said chamber, an apertured nozzle in said tank located below said predetermined liquid level, air intake means connected to said nozzle extending outside the tank, whereby outside air can be admitted and be discharged through said nozzle to agitate the liquid fuel and form a fuel vapor and air mixture in the upper space in the tank, and conduit means connecting said upper space to said first-named air supply conduit.
Claim 3
Dependent Claim
211 words
In combination with an internal combustion engine having a carburetor, air intake means, an air supply conduit connecting said air intake means to said carburetor, a liquid fuel supply line, and a liquid fuel supply conduit connecting said supply line to said carburetor, normally open first valve means in said air intake means, normally open second valve means in said liquid fuel supply conduit, means to operate said first and second valve means towards closure responsive to a rise in engine temperature, an auxiliary tank, conduit means connecting said liquid fuel supply line to said auxiliary tank, means to maintain a predetermined liquid fuel level in said auxiliary tank, a heat exchange chamber in said auxiliary tank below said level so as to be immersed in the liquid fuel in said tank, means to circulate hot fluid from the engine through said chamber, an apertured nozzle in said tank located below said predetermined liquid level, air intake means connected to said nozzle extending outside the tank, whereby outside air can be admitted and be discharged through said nozzle to agitate the liquid fuel and form a fuel vapor and air mixture in the upper space in the tank, and conduit means connecting said upper space to said first-named air supply conduit.
Claim 4
Dependent Claim
211 words
In combination with an internal combustion engine having a carburetor, air intake means, an air supply conduit connecting said air intake means to said carburetor, a liquid fuel supply line, and a liquid fuel supply conduit connecting said supply line to said carburetor, normally open first valve means in said air intake means, normally open second valve means in said liquid fuel supply conduit, means to operate said first and second valve means towards closure responsive to a rise in engine temperature, an auxiliary tank, conduit means connecting said liquid fuel supply line to said auxiliary tank, means to maintain a predetermined liquid fuel level in said auxiliary tank, a heat exchange chamber in said auxiliary tank below said level so as to be immersed in the liquid fuel in said tank, means to circulate hot fluid from the engine through said chamber, an apertured nozzle in said tank located below said predetermined liquid level, air intake means connected to said nozzle extending outside the tank, whereby outside air can be admitted and be discharged through said nozzle to agitate the liquid fuel and form a fuel vapor and air mixture in the upper space in the tank, and conduit means connecting said upper space to said first-named air supply conduit.
Claim 5
Dependent Claim
28 words
The structural combination of claim 1, and wherein said means to operate said first and second valve means towards closure includes means responsive to the engine exhaust temperature.
Claim 6
Dependent Claim
39 words
The structural combination of claim 1, and wherein said engine has a liquid cooling system and said means to operate said first and second valve means includes means responsive to the temperature of the liquid of said cooling system.
Claim 7
Dependent Claim
24 words
The structural combination of claim 3, and wherein said hot fluid from the engine cirCulating through said chamber comprises liquid of said cooling system.
Claim 8
Dependent Claim
18 words
The structural combination of claim 1, and wherein said first and second valve means comprises respective solenoid valves.
Claim 9
Dependent Claim
37 words
The structural combination of claim 5, and wherein the first valve means is provided with an energizing circuit including a temperature-sensing current-modifying electrical element mounted so as to be exposed to the exhaust gases of the engine.
Claim 10
Dependent Claim
45 words
The structural combination of claim 6, and wherein the engine has a liquid cooling system and the second valve means is provided with an energizing circuit including a temperature-sensing current-modifying electrical element mounted so as to be exposed to the liquid of said cooling system.
Claim 11
Dependent Claim
85 words
The structural combination of claim 1, and wherein the first and second valve means comprise respective solenoid valves and the engine has a liquid cooling system, the first valve means being provided with an energizing circuit including a temperature-sensing current-modifying electrical element mounted so as to be exposed to the exhaust gases of the engine and the second valve means is provided with an energizing circuit including a temperature-sensing current-modifying electrical element mounted so as to be exposed to the liquid of said cooling system.
Claim 12
Dependent Claim
29 words
The structural combination of claim 8, and wherein said fuel level-maintaining means comprises a float valve in the connection between the liquid fuel supply line and said auxiliary tank.
Claim 13
Dependent Claim
95 words
The structural combination of claim 9, and wherein said auxiliary tank has opposite end walls, said float valve being located adjacent one end wall and said apertured nozzle being located adjacent the opposite end wall and extending substantially horizontally in the tank, and an inclined baffle plate mounted in said upper space and extending from said one end wall and being inclined downwardly toward said opposite end wall and overlying at least a portion of said nozzle, the last-named conduit means being in communication with the portion of said upper space above said baffle plate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |