US1707942A - Air valve for carburetors - Google Patents

Air valve for carburetors Download PDF

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Publication number
US1707942A
US1707942A US182643A US18264327A US1707942A US 1707942 A US1707942 A US 1707942A US 182643 A US182643 A US 182643A US 18264327 A US18264327 A US 18264327A US 1707942 A US1707942 A US 1707942A
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United States
Prior art keywords
air
air valve
valve
throttle
carburetors
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Expired - Lifetime
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US182643A
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Henry B Petit
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Individual
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Priority to US182643A priority Critical patent/US1707942A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/101—Special flap shapes, ribs, bores or the like
    • F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/109—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps having two or more flaps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7748—Combustion engine induction type
    • Y10T137/7753—Unbalanced pivoted valve [e.g., unbalanced butterfly type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7898—Pivoted valves
    • Y10T137/7903—Weight biased

Definitions

  • the object of this invention is to provide a simple weighted air valve which will not requirea dash pot to prevent pulsation.
  • Other objects are to provide an air valve which will providethe intensified compensation which is necessary to ensure steady low speed running when no bypass is provided around the throttle.
  • Another object is to provide an air valve which will, at wide open throttle, offer a minimum resistance to the air flow, so that-the carburetor operates practically as a plain tube carburetor.
  • theobject is to obtain at intermediate throttle positions (when the car is being driven through the driving range) the necessary minimum fuel consumption, without which a carburetor is unsalable.
  • the chief object of this invention is to provide an air valve in which the air flow itself automatically stabilizes the air valve at high air velocity, eliminating the need for a dash pot.
  • Figure 1 shows the air valve applied to avaporizer of the type. in which a hot rich mixture is diluted with cold air.
  • Figure 2 is a cross section on section 2-2v of Figure 3.
  • Figure 3 is a partial sectional plane 33 of Figure 1.
  • A is the air entrance
  • B is the air valve
  • C is the stop limiting the opening movement of the air valve
  • 'D is the starting (choke) valve
  • E is the .Venturi tube mixing chamber
  • F is the entrance for the elevation on hot'rich mixture into the mixing chamber E.
  • G is the throttle valve located in the mixture outlet.
  • J J are the pivots or supports for the air valve B.
  • K is the distance this support is located below center.
  • the angle M which is the angle the bottom face of the air valve B makes with the horizontal, T have found should be 25.
  • the clearance between" the valve B and the air entrance A should be .015 all around, or'.030"- in diameter, in order that there should be 1" depression in F on idling.
  • the widest portion of the air valve assumes a position which ofiers the least obstruction when the air flow is greatest. That is to say, the air valve is more or less stream lined, the thin edge facing down stream, although obviously a coil spring could be substituted for gravity or to assist the force of gravity.
  • a wedgeshaped air valve pivotally supported in the air stream-0n a horizontal axis, so that the greater portion of the surface is located above said axis, and the greater mass ofthe air valve is located below the said axisythe bottom of the valve being Wedge-shaped, Whereis at a maximum and. automatically takes av position substantially normal the air velocity when the air flow is at a mlnimum.

Description

April 2, 11929, B IT H,7@7,942
AIR VALVE FOR CARBURETORS I Filed April 11, 1927 INVENTOR ATTORNEY Patented Apr. 2, 1929.
warren stares marten PATENT I @IFFHCGE.
HENRY n. rnrr'r, or nn'rnorr, raronreen, nssrenon 'ro enonen in. nouns, or
DETROIT, MICHIGAN.
AIR VALVE FOR CARB'URETORS.
Application filed April 11,
The object of this invention is to provide a simple weighted air valve which will not requirea dash pot to prevent pulsation. Other objects are to provide an air valve which will providethe intensified compensation which is necessary to ensure steady low speed running when no bypass is provided around the throttle.
Another object is to provide an air valve which will, at wide open throttle, offer a minimum resistance to the air flow, so that-the carburetor operates practically as a plain tube carburetor. Finally, theobject is to obtain at intermediate throttle positions (when the car is being driven through the driving range) the necessary minimum fuel consumption, without which a carburetor is unsalable.
vices operated by the throttle, and known as This intermediate lean mixture has heretofore been usually obtained by mechanical deeconomizers. The defect of such throttle controlled economizers is that they come into operation at. a definite throttle position, whereas an air valve gives a definitely richer 'rnixture during the period immediately after the opening of the throttle, that is during the time the engine is accelerating.
However, the chief object of this invention is to provide an air valve in which the air flow itself automatically stabilizes the air valve at high air velocity, eliminating the need for a dash pot.
Figure 1 shows the air valve applied to avaporizer of the type. in which a hot rich mixture is diluted with cold air.
Figure 2 is a cross section on section 2-2v of Figure 3.
Figure 3 is a partial sectional plane 33 of Figure 1.
- Figure 4 shows an alternative construction. In the figures, A is the air entrance, B is the air valve, C is the stop limiting the opening movement of the air valve. 'D is the starting (choke) valve, E is the .Venturi tube mixing chamber. F is the entrance for the elevation on hot'rich mixture into the mixing chamber E.
G is the throttle valve located in the mixture outlet. J J are the pivots or supports for the air valve B. K is the distance this support is located below center. L is the width of the widest portion of the air'valve. lln the preferred construction I have "found that with a valve 1.283 dia, K:.04:6, and L=13/16' ,"that these proportions give the ly opens graduall 1927. Serial a... 182,643.
above described result. The angle M, which is the angle the bottom face of the air valve B makes with the horizontal, T have found should be 25. The importance of these inclined flat surfaces in ensuring stability is emphasized. The clearance between" the valve B and the air entrance A should be .015 all around, or'.030"- in diameter, in order that there should be 1" depression in F on idling. p
It will be noted (see Fig. 1) that the widest portion of the air valve assumes a position which ofiers the least obstruction when the air flow is greatest. That is to say, the air valve is more or less stream lined, the thin edge facing down stream, although obviously a coil spring could be substituted for gravity or to assist the force of gravity.
In Figure 4: theair valve B has been more turi E. removed so that the stream lined air valve itself will take its place and forms a mixing chamber of somewhat venturi form, but the flat faces on the upstream side of the air valve are retained.
0pemti0n.Tn Figures 1, 2, and 3, when the engine is idling, the air valve B is sub stantially in a vertical position when the throttle G is opened and the depression in F increases above 1" of water thevalve B slowadmitting more air. When the throttle is thrown wide open the valve B takes the position shown in "Figure 1. When it is in this position, if it is moved out of'the position shown it immediately returns to this position. That is to say, it is positively held in a position parallel to the air'stream, and may be said to be in a position of stable equilibrium.
What I claim is 1. In a carburetor, an air passage, a wedgeshaped weighted air valve pivotally supported in the air stream and adapted to take aposition parallel to the air stream when the air valve is at maximum with the thinner edge of the air valve facing down stream.
2. lin a carburetor, an air passage, a wedge-shaped weighted air valve pivotally supported in the air stream and adapted to take a position parallel to the air stream when the air, valve is at maximum with the thinner edge of the air valve facing down stream, the bottom of said air valve being bounded by two fiat surfaces symmetrically inclined to the axis of said air valve.
3. In a carburetor,an air passage, a wedgeshaped air valve pivotally supported in the air stream-0n a horizontal axis, so that the greater portion of the surface is located above said axis, and the greater mass ofthe air valve is located below the said axisythe bottom of the valve being Wedge-shaped, Whereis at a maximum and. automatically takes av position substantially normal the air velocity when the air flow is at a mlnimum.
lln testimony whereof ll afiix my signature.
US182643A 1927-04-11 1927-04-11 Air valve for carburetors Expired - Lifetime US1707942A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934084A (en) * 1954-04-12 1960-04-26 Boeing Co Butterfly check valves
US3330157A (en) * 1964-08-11 1967-07-11 Liquid Controls Corp Liquid transmission system
US3945398A (en) * 1973-06-29 1976-03-23 Henry Masheder Check valves
EP0968909A3 (en) * 1998-06-30 2000-10-04 Harley-Davidson Motor Company Motorcycle air intake assembly
US20150167848A1 (en) * 2013-05-21 2015-06-18 Shinseung Precision Industry Ltd. Wheel valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934084A (en) * 1954-04-12 1960-04-26 Boeing Co Butterfly check valves
US3330157A (en) * 1964-08-11 1967-07-11 Liquid Controls Corp Liquid transmission system
US3945398A (en) * 1973-06-29 1976-03-23 Henry Masheder Check valves
EP0968909A3 (en) * 1998-06-30 2000-10-04 Harley-Davidson Motor Company Motorcycle air intake assembly
US20150167848A1 (en) * 2013-05-21 2015-06-18 Shinseung Precision Industry Ltd. Wheel valve

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