US3756270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary anti pollution air intake device for internal combustion engines
Assignee: MONOCAR HC INTERNACIONAL SA
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Filing: 1972-04-25
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Granted: 1973-09-04
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Expires: 1992-04-25
Abstract
Abstract A fuel economizer device for diminishing pollution exhaust gases discharged by non-supercharged gasoline powered internal combustion engines, includes two basic members having aligned air passageways therethrough and adjustably connected at their adjoining ends, one of said members having an intake opening in its free end portion and with its passageway including adjacent frusto-conical divergent and convergent portions defining a valve chamber of diamond configuration in longitudinal section, and having a seating surface at the juncture of said passageway with said divergent portion, and the other member having an outlet in its free end portion and connectable to the air/fuel intake system of an engine. A valve body is position in said valve chamber and is suspended between first and second springs which extend in opposite directions into the air passageways. The spring biasing the valve body toward seating has a stiffness exceeding that of the other spring, whereby the valve body normally is seated to close the passageway. Increases of vacuum at the intake system of the engine, due, for example, to unloading of the engine, displaces the valve body from its seat to provide an annular air passage around said valve body of increasing cross-section in accordance with valve body displacement. A smoothly increasing amount of auxiliary air flow is thereby provided to the engine intake in proportion to vacuum at the engine intake. Adjustment of the members relative to each other varies spring pressure to regulate valve body displacement in accordance with particular engine requirements so that the device is adaptable to a wide variety of engines.
Inventors
- 👤 J Gonzalez
- 👤 E Gibbon
- 👤 M Fonseca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:05
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; F02M23/09; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
290 words
An exhaust emission control and fuel economizer device for an internal combustion engine, comprising in combination: a first cylindrical member having an air intake port opening into a first axial passageway; a second cylindrical member having a second axial passageway terminating in an air output opening connectable to a reduced pressure air/fuel intake point at the engine; said first and second members being connected with said first and second passageways aligned and defining a through passageway; said through passageway including concentric base-to-base, frusto-conical divergent and convergent portions defining a valve chamber; the frustum of said divergent portion and said first passageway being joined and defining an annular valve seat; a valve body axially symmetric within said chamber; first and second springs contacting opposite sides of said valve body and extending in opposite directions in said passageways, said springs biasing said valve body in opposite directions with respect to said valve seat, said first spring biasing said body against said seat and providing a greater force than said second spring, whereby the through passageway normally is closed, reduction of pressure at said output opening due to engine loading displacing said valve body from said seat to provide an annular air passageway between said valve body and said divergent chamber wall, said annular passageway being of increasing cross-section in accordance with the valve body displacement to provide a smoothly increasing flow of auxiliary air as a function of engine vacuum; and means adjustably connecting said members to vary the length of the passageway in which said first spring is disposed and thereby selectively vary the action of said first spring on said valve body, whereby the opening and closing response points of said valve body may be set to a selected value.
Claim 2
Dependent Claim
290 words
An exhaust emission control and fuel economizer device for an internal combustion engine, comprising in combination: a first cylindrical member having an air intake port opening into a first axial passageway; a second cylindrical member having a second axial passageway terminating in an air output opening connectable to a reduced pressure air/fuel intake point at the engine; said first and second members being connected with said first and second passageways aligned and defining a through passageway; said through passageway including concentric base-to-base, frusto-conical divergent and convergent portions defining a valve chamber; the frustum of said divergent portion and said first passageway being joined and defining an annular valve seat; a valve body axially symmetric within said chamber; first and second springs contacting opposite sides of said valve body and extending in opposite directions in said passageways, said springs biasing said valve body in opposite directions with respect to said valve seat, said first spring biasing said body against said seat and providing a greater force than said second spring, whereby the through passageway normally is closed, reduction of pressure at said output opening due to engine loading displacing said valve body from said seat to provide an annular air passageway between said valve body and said divergent chamber wall, said annular passageway being of increasing cross-section in accordance with the valve body displacement to provide a smoothly increasing flow of auxiliary air as a function of engine vacuum; and means adjustably connecting said members to vary the length of the passageway in which said first spring is disposed and thereby selectively vary the action of said first spring on said valve body, whereby the opening and closing response points of said valve body may be set to a selected value.
Claim 3
Dependent Claim
72 words
A device in accordance with claim 1 wherein said first and second members are adjustably threadable with respect to one another, the degree of inter-threading thereof varying the length of the said passageway in which said first spring is disposed, and further including lock nut means engaging the threads of one of said inter-threaded members for bearing against a shoulder on the other of said members, thereby fixing the degree of inter-threading.
Claim 4
Dependent Claim
27 words
A device in accordance with claim 2 comprising a sealing ring between said lock nut and shoulder for preventing air leakage into or out of said passageway.
Claim 5
Dependent Claim
36 words
A device in accordance with claim 2 comprising a sleeve positioned in said passageway in communication with said output opening, said sleeve closely surrounding said first spring to guide said spring and prevent lateral displacement thereof.
Claim 6
Dependent Claim
58 words
A device in accordance with claim 4 wherein said valve chamber is defined entirely within said first cylindrical member, and wherein said first member comprises inter-threaded intermediate and end portions, the two said portions being separable at the maximum diameter of said valve chamber whereby said chamber is accessible for cleaning and servicing by unthreading of said portions.
Claim 7
Dependent Claim
14 words
A device in accordance with claim 1 wherein said valve body comprises a sphere.
Claim 8
Dependent Claim
47 words
A device in accordance with claim 1 wherein said valve body comprises a generally conical body positioned in said chamber with the apex thereof extending in the direction of said intake port, whereby the diverging side wall of said conical body is engagable with said valve seat.
Claim 9
Dependent Claim
43 words
A device in accordance with claim 1 wherein said valve body comprises a mushroom-shape having semispherical and steam portions, the said body being oriented in said valve chamber such that the concave exterior of said semispherical portion is seatable against said valve seat.
Claim 10
Dependent Claim
90 words
A device in accordance with claim 7 wherein said first and second springs are secured to opposite sides of said valve body and bias the said body by tension, said second spring biasing said body towards opening being fixed to said second member adjacent said output opening, means adjustably positioned in said first passageway beyond said intake opening from said valve chamber, said first spring biasing said body toward said valve seat being secured to said means for selective variation of the tension of said spring on said valve body.
Claim 11
Dependent Claim
56 words
A device in accordance with claim 9 wherein said means comprises an Anchor nut threaded upon internal threads in said first passage, said spring end being joined to said nut for free rotation therebetween, whereby said nut may rotate with respect to said spring end and axially displace said end by threaded adjustment of said nut.
Claim 12
Dependent Claim
24 words
A device in accordance with claim 10 comprising a lock nut overlying said anchor nut for fixing the axial position of said anchor nut.
Claim 13
Dependent Claim
58 words
A device in accordance with claim 11 wherein the said first passage of said first member is closed at its axially terminal point, and wherein said air input port comprises a lateral opening passing through the side wall of said first member and into said first passage at a point between said valve chamber and said anchor nut.
Claim 14
Dependent Claim
101 words
A device according to claim 1 wherein said second member comprises an outer cylindrical shell and an inner tubular portion concentrically spaced within said shell, said tubular portion defining said second passageway, and a shoulder at its inner end, said first member having an extended sleeve portion telescoped between said shell and tubular portion, said first spring comprising a compression spring bearing at its end opposite said valve body against said shoulder and substantially contacting the wall of said passageway between said shoulder and said valve body, said inner wall thereby acting as a guide preventing lateral displacement of said spring.
References Cited (Backward Citations)
GB191406856A
Cited
US1177831A
Cited
US1395932A
Cited
US1689280A
Cited
US1798027A
Cited
GB500420A
Cited
US2587421A
Cited
US3118435A
Cited
US3336942A
Cited
US3489172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |