Patent US3672340A successfully refreshed from Google Patents.
US3672340A
Expired / Lapsed
US
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Exhaust feedback and control system for internal combustion engines
Assignee: Individual
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Filing: 1970-05-18
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Granted: 1972-06-27
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Expires: 1990-05-18
Abstract
Abstract An exhaust feedback and control system for internal combustion engines. At least one feedback pipe is connected at one end to the engine exhaust pipe and at the other end to the engine intake for diverting a fractional portion of the engine exhaust and delivering it to the combustion chamber. An air pipe is connected to the engine air pump for delivering air under pressure through at least one passage to the exhaust pipe at a location in juxtaposition with the feedback pipe for diluting the fractional portions of diverted exhaust with air. The arrangement also provides for cooling of the exhaust and for damping pressure variations in the feedback line. A muffler-filter is interposed between the exhaust pipe and tail pipe.
Inventors
- 👤 Georg A Bomba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:15
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/52; F02M26/59; F02M26/61; F02M26/13; F02M26/36; F02M26/37; F02M26/35; F02M26/42; F02M26/44
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
115 words
An exhaust feedback and control system for internal combustion engines of the type having a combustion chamber, an exhaust pipe, and an air pump comprising: at least one feedback pipe connected at one end to the exhaust pipe for diverting fractional portions of the exhaust, and connected at the other end for delivering exhaust to the combustion chamber said feedback pipe connected directly to the engine combustion chamber through a back pressure valve; and at least one air pipe connected at one end to the air pump outlet for supplying air under pressure and at the other end to the exhaust pipe in juxtaposition with said feedback pipe for diluting the feedback exhaust with air.
Claim 2
Dependent Claim
115 words
An exhaust feedback and control system for internal combustion engines of the type having a combustion chamber, an exhaust pipe, and an air pump comprising: at least one feedback pipe connected at one end to the exhaust pipe for diverting fractional portions of the exhaust, and connected at the other end for delivering exhaust to the combustion chamber said feedback pipe connected directly to the engine combustion chamber through a back pressure valve; and at least one air pipe connected at one end to the air pump outlet for supplying air under pressure and at the other end to the exhaust pipe in juxtaposition with said feedback pipe for diluting the feedback exhaust with air.
Claim 3
Dependent Claim
46 words
An exhaust feedback and control system as set forth in claim 1 wherein is provided an exhaust feedback reservoir means in the feedback line, said reservoir having a cross-sectional area greater than that of the feedback pipe for damping variations of pressure in the feedback line.
Claim 4
Dependent Claim
25 words
An exhaust feedback and control system as set forth in claim 1 wherein said feedback pipe is connected to the engine intake at the carburetor.
Claim 5
Dependent Claim
27 words
An exhaust feedback and control system as set forth in claim 1 wherein said pipes are arranged to divert approximately one-half to two-thirds of the engine exhaust.
Claim 6
Dependent Claim
27 words
An exhaust feedback and control system as set forth in claim 1 wherein is provided at least one cooling jacket around a portion of the exhaust path.
Claim 7
Dependent Claim
101 words
An exhaust feedback and control system for internal combustion engines comprising: an exhaust pipe; a feedback pipe connected at one end to the exhaust pipe for diverting a fractional portion of the exhaust to the engine combustion chamber; an air pump; an air pipe connected at one end to the air pump outlet for delivering air undEr pressure at the other end to the exhaust pipe in juxtaposition with said feedback pipe connection; and an exhaust reservoir in said feedback line comprising a cavity having greater cross-sectional area than said acceleration and pipe for damping pressure variations in the feedback exhaust.
Claim 8
Dependent Claim
101 words
An exhaust feedback and control system for internal combustion engines comprising: an exhaust pipe; a feedback pipe connected at one end to the exhaust pipe for diverting a fractional portion of the exhaust to the engine combustion chamber; an air pump; an air pipe connected at one end to the air pump outlet for delivering air undEr pressure at the other end to the exhaust pipe in juxtaposition with said feedback pipe connection; and an exhaust reservoir in said feedback line comprising a cavity having greater cross-sectional area than said acceleration and pipe for damping pressure variations in the feedback exhaust.
Claim 9
Dependent Claim
79 words
An exhaust feedback and control system for internal combustion engines comprising: means for cooling the engine exhaust; means for diluting the engine exhaust with air; feedback means for diverting a fractional portion of said exhaust and air mixture and directing said fractional portion directly into the engine combustion chamber; feedback and one-way back pressure valve means coupled between said feedback means and the engine combustion chamber for preventing flow-out of exhaust from the combustion chamber during the power stroke.
Claim 10
Dependent Claim
79 words
An exhaust feedback and control system for internal combustion engines comprising: means for cooling the engine exhaust; means for diluting the engine exhaust with air; feedback means for diverting a fractional portion of said exhaust and air mixture and directing said fractional portion directly into the engine combustion chamber; feedback and one-way back pressure valve means coupled between said feedback means and the engine combustion chamber for preventing flow-out of exhaust from the combustion chamber during the power stroke.
Claim 11
Dependent Claim
24 words
An exhaust feedback and control system as set forth in claim 7 wherein is provided means for damping pressure variations in said feedback means.
Claim 12
Dependent Claim
24 words
An exhaust feedback and control system as set forth in claim 7 wherein said fractional portion of exhaust comprises approximately one-half to two-thirds thereof.
Claim 13
Dependent Claim
29 words
An exhaust feedback and control system as set forth in claim 6 wherein said feedback means directs the exhaust and air mixture adjacent the carburetor into the engine intake.
Claim 14
Dependent Claim
154 words
An exhaust feedback control system for internal combustion engines of the type having a combustion chamber exhaust pipe, and an air pump comprising: first and second feedback pipes, each connected at one end to the exhaust pipe for diverting fractional portions of the engine exhaust; a feedback reservoir comprising a pipe to which said first and second feedback pipes are connected, said reservoir pipe having a cross-sectional area greater than the cross section area of said feedback pipes for damping variations in pressure; a return pipe connected to said reservoir pipe for delivering the exhaust to the engine combustion chamber; and an air pipe connected to the engine air pump for delivering air under pressure, said air pipe having first and second passages connected to the exhaust pipe in juxtaposition with said first and second feedback pipes, respectively, whereby the fractional portions of said exhaust diverted by the feedback pipes are diluted with air.
Claim 15
Dependent Claim
154 words
An exhaust feedback control system for internal combustion engines of the type having a combustion chamber exhaust pipe, and an air pump comprising: first and second feedback pipes, each connected at one end to the exhaust pipe for diverting fractional portions of the engine exhaust; a feedback reservoir comprising a pipe to which said first and second feedback pipes are connected, said reservoir pipe having a cross-sectional area greater than the cross section area of said feedback pipes for damping variations in pressure; a return pipe connected to said reservoir pipe for delivering the exhaust to the engine combustion chamber; and an air pipe connected to the engine air pump for delivering air under pressure, said air pipe having first and second passages connected to the exhaust pipe in juxtaposition with said first and second feedback pipes, respectively, whereby the fractional portions of said exhaust diverted by the feedback pipes are diluted with air.
Claim 16
Dependent Claim
64 words
An exhaust feedback and control system as set forth in claim 11 wherein the exhaust pipe downstream from the feedback pipe is connected to a liquid muffler and filter comprising a tank of water and boiler compound, said exhaust pipe connected below the level of liquid in the tank, said tank provided with a tail pipe connected above the liquid level in the tank.
Claim 17
Dependent Claim
21 words
An exhaust feedback and control system as set forth in claim 11 wherein said return pipe is connected at the carburetor.
Claim 18
Dependent Claim
28 words
An exhaust feedback and control system as set forth in claim 11 wherein said return pipe is connected directly to the combustion chamber of the internal combustion engine.
Claim 19
Independent Claim
190 words
A system for controlling exhaust emission in internal combustion engines having a plurality of combustion chambers, air exhaust pipe, and an airpump means comprising: a plurality of feedback pipes each connected at one end to the exhaust pipe for diverting fractional portions of the exhaust, each said feedback pipe having a cross-sectional area less than the cross-sectional area of the exhaust pipe; a reservoir pipe to which the other end of each feedback pipe is connected, said reservoir pipe comprising a cavity for damping variations in pressure in the exhaust feedback; a return pipe for directing exhaust feedback from the reservoir pipe to the combustion chambers of the engine said return pipe formed with a plurality of passageways connected to communicate directly with the respective engine combustion chambers and with a plurality of back pressure valves one in each said return pipe passageway; and means for diluting the feedback exhaust with air comprising an air supply pipe having at one end a plurality of passageways connected to the exhaust pipe in juxtaposition with said feedback pipes, said air supply pipe connected at its other end to the engine air pump.
Claim 20
Independent Claim
190 words
A system for controlling exhaust emission in internal combustion engines having a plurality of combustion chambers, air exhaust pipe, and an airpump means comprising: a plurality of feedback pipes each connected at one end to the exhaust pipe for diverting fractional portions of the exhaust, each said feedback pipe having a cross-sectional area less than the cross-sectional area of the exhaust pipe; a reservoir pipe to which the other end of each feedback pipe is connected, said reservoir pipe comprising a cavity for damping variations in pressure in the exhaust feedback; a return pipe for directing exhaust feedback from the reservoir pipe to the combustion chambers of the engine said return pipe formed with a plurality of passageways connected to communicate directly with the respective engine combustion chambers and with a plurality of back pressure valves one in each said return pipe passageway; and means for diluting the feedback exhaust with air comprising an air supply pipe having at one end a plurality of passageways connected to the exhaust pipe in juxtaposition with said feedback pipes, said air supply pipe connected at its other end to the engine air pump.
Claim 21
Dependent Claim
49 words
A system for controlling exhaust emission as set forth in claim 15 wherein the pipe dimensions are proportioned so that the total fractional portion of diverted exhaust comprises approximately one-half to two-thirds of the exhaust and wherein said exhaust is diluted with air in the ratio of approximately 1:1.
Claim 22
Dependent Claim
68 words
A system for exhaust emission control as set forth in claim 15 wherein the exhaust pipe downstream from the feedback pipe is connected to a liquid muffler-filter comprising a tank having a liquid boiler compound-water mixture therein, said exhaust pipe connected to the tank below the liquid level in the tank and wherein a tail pipe is connected to the tank above the liquid level in the tank.
Claim 23
Dependent Claim
28 words
A system for controlling exhaust emission as set forth in claim 15 wherein the exhaust pipe is formed with a smaller cross-sectional area downstream from the feedback pipes.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |