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US3974802A Expired / Lapsed US ⏱️ 0.0 years remaining

Internal combustion engine

Assignee: Individual
•
Filing: 1975-01-20
•
Granted: 1976-08-17
•
Expires: 1995-01-20
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Abstract

Abstract An internal combustion engine is disclosed having more efficient combustion to greatly reduce the exhaust emissions. The internal combustion engine comprises an air-cooled two cycle engine having a relatively longer piston stroke (approximately 6 inches) and a relatively slower operating speed (approximately 2,800 rpm) than present day internal combustion engines. The engine also includes a heat exchanger or a thermostatically controlled heating element for preheating and vaporizing the gasoline as it enters the combustion chambers. Air for the combustion chambers of the engine is also preheated by means of a fan which draws the air over the cooling fins on the engine block and forces the air heated by contact with the fins into an intake manifold. A heat exchanger is also provided to contain and heat a quantity of water until it turns to steam. The steam is then introduced into the air intake manifold to be introduced into the combustion chambers along with the air. This mixture of hot air, steam and vaporized gas will completely burn within the longer stroke, slower speed engine construction to thereby greatly reduce exhaust emissions that contribute to smog.

Inventors

  • 👤 Hendrik W. Lundquist

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 02:18
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/16; F02M31/18; F02M25/00; F02M25/022; F02M25/032; F02M25/035; F02M31/14; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 177 words
An air cooled internal combustion engine, having at least one combustion chamber, said combustion chamber having cooling fins located on the exterior thereof, comprising: means for admitting fuel into each combustion chamber; means for preheating said fuel prior to entering each combustion chamber to enable said fuel to vaporize as it enters said combustion chamber, said means for preheating said fuel comprising a heat exchanger positioned within the exhaust manifold of the engine; means for admitting water into each combustion chamber; means for preheating said water prior to entering each combustion chamber to enable said water to vaporize as it enters said combustion chamber, said means for preheating said water comprising a heat exchanger positioned within the exhaust manifold of the engine; and means for admitting air into each combustion chamber and means for preheating the air prior to entering said combustion chamber, said means comprising a fan for drawing air through an area adjacent the cooling fins of the combustion chamber and forcing said air heated by contact with the fins into said air admitting means.
Claim 2
Dependent Claim 177 words
An air cooled internal combustion engine, having at least one combustion chamber, said combustion chamber having cooling fins located on the exterior thereof, comprising: means for admitting fuel into each combustion chamber; means for preheating said fuel prior to entering each combustion chamber to enable said fuel to vaporize as it enters said combustion chamber, said means for preheating said fuel comprising a heat exchanger positioned within the exhaust manifold of the engine; means for admitting water into each combustion chamber; means for preheating said water prior to entering each combustion chamber to enable said water to vaporize as it enters said combustion chamber, said means for preheating said water comprising a heat exchanger positioned within the exhaust manifold of the engine; and means for admitting air into each combustion chamber and means for preheating the air prior to entering said combustion chamber, said means comprising a fan for drawing air through an area adjacent the cooling fins of the combustion chamber and forcing said air heated by contact with the fins into said air admitting means.
Claim 3
Dependent Claim 27 words
The combination of claim 1 wherein the combustion chambers of said internal combustion engine operate on a two-cycle basis which includes an intake-compression cycle and combustion-exhaust cycle.
Claim 4
Dependent Claim 22 words
The combination of claim 2, wherein each combustion chamber comprises an exhaust port located horizontally above said air and water admitting means.
Claim 5
Dependent Claim 33 words
The combination of claim 1 wherein each combustion chamber includes a piston reciprocally mounted therein, each piston having a drive linkage dimensioned to enable said piston to have a stroke of 6 inches.
Claim 6
Dependent Claim 25 words
The invention of claim 4, wherein said admission, ignition and exhaust means are timed to enable each piston to reciprocate at 3000 revolutions per minute.
Claim 7
Dependent Claim 42 words
The combination of claim 1 further including an outer shell positioned around each finned combustion chamber to provide a passage for the air to pass as it contacts the cooling fins of the combustion chamber as it is drawn into the fan.

References Cited (Backward Citations)

US1470461A Cited
FR551387A Cited
US2197503A Cited
US2756730A Cited
US2897801A Cited
US2996052A Cited
US3717129A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-08-17 1980-02-16 1980-08-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-08-17 1984-02-16 1984-08-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-08-17 1988-02-16 1988-08-17 $7700.00 Window Closed / Lapsed

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