US2609807A - winkler - Google Patents

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US2609807A
US2609807A US2609807DA US2609807A US 2609807 A US2609807 A US 2609807A US 2609807D A US2609807D A US 2609807DA US 2609807 A US2609807 A US 2609807A
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primary
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation
    • F02M1/18—Enriching fuel-air mixture by depressing float to flood carburettor
    • F02M1/185—Enriching the fuel-air mixture by altering the float chamber level by external means, e.g. by opening the input valve
    • 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
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof

Definitions

  • the present invention relates to carburetors for internal combustion engines, and more particularly to carburetorsof the multiple stage type for automotive engines.
  • the present invention is 'prin cipally concerned with a mechanism for control: ling, themsecondary induction system in response to throttle position in the primary induction sys-. tem and touthe temperature of the ,engine, o'ne of the objects'of the invention being to provide a temperature responsive means for rendering the control mechanism ineffective to actuate the secondary system until the engine hasvreached a predetermined temperature. l n
  • Anotherobject of the invention is toprovide a carburetor having a primary and a'secondary induction system wherein the'secondary system is controlled in response to throttle position in the primary system and isbrought into operation gradually as the, engine accelerates.
  • Another object of the invention is to provide, in a multiple stage carburetor havingamechanism controlled in accordance with the movement of throttle valve in the primary system for controlling the throttle valve of the secondary system, a temperature responsive means'for posi-- tively; preventing the secondary throttle valve fromioperatin'g while the engine is cold.
  • Figure l- is a side elevation of a multiple stage carburetor showing certain elements of thecontrol mechanism for the secondary induction system in cross-section; 1
  • Figure 2 is a partial side elevation of a multiple stage carburetor showingportions of the control mechanism of the secondary induction system in cross section as in Figure 1, but in a different operative position;
  • Figured is a view of certain levers forminga part i of l the control mechanism.
  • a multiple stage carburetor generally designated by numeral In is shown mounted on an intake manifold I2 of'an internal combustion engine (not shown) and contains a-pr'imaryinductionsystem
  • the two systems are provided with separate idle systems, fuel inlet valves and float chambers and are adapted to discharge the fuel-air mixture directly into intake manifold 12.
  • a single accelerating pump (not shown), which may be either a mechanical or a vacuum type pump, is adapted to discharge into the primary induction system as the primary throttle is opened.
  • a choke valve 24 preferably of the unbalanced type, mounted in the airinlet of the induction passage 18A on a shaft 26, said choke valve being controlled either by a manual means or by an automatic choking device having a thermostatic element and a vacuum actuated means.
  • the throttle valve 20A. of the primary inducetion system is manually actuated by the operator through lever 30 mounted on one end of throttle shaft 32 and is regulated in the degree of closing by a stop 'screw' 34 on said lever and a fast idle cam 36 controlled through a linkage (shown in part at 31) by a choke control mechanism (not shown)
  • the throttle valve 20B of the secondary induction passage is controlled by the primary throttle valve through a linkage consisting of a lever 3Brotatably mounted on one endof shaft 32, a lever 40 rigidly mounted-on one end of throttle shaft 42 of the secondary throttle valve 20B and a rod 44 interconnecting levers 3B and 40, said rod being pivotally connected to theiree end'o'f'lever 38 and to lever 40 by a trunnion.
  • Lever 38 is actuated in the direction to open the secondary throttle valve by lever 30 through a one-way connection consisting of a' 11'1g52fi0n lever '38 adapted to be engaged by lever 30 as said latter lever is moved in the opening direction.
  • the position of lever 38 in relation to lever 30 is such that the primary throttle valve must be moved to partially opened position before the secondary throttle valve is unobstructed by said thermostat.
  • Spring 48 which forms a yieldable connection between levers 38 and 40 permits the primary throttle valve to be moved to its wide open position while the secondary throttle valve is held closed by thermostatic element 10.
  • the choke valve 24 will beclosed and the secondary throttle valve will be held in its latched position by the finger 12 of thermostat l0 hooked over the end of lever 73.
  • the primary induction system is the sole source of fuel-air mixmoved toward open position, though the movement of the primary throttle valve after the secondary throttle valve has started to open is sufficient to fully open the secondary throttle valve.
  • An arm 54 on lever is adapted to engage lever 38 as the primary throttle valve is movedtoward closed position and to positively move said lever in the direction to close the secondary throttle .valve.
  • the effective length of rod 44 in transmitting the closing movement of lever 38 to lever may be adjusted b moving nuts '55 and 56 upwardly or downwardly on rod 44, nut 56 being used to lock nut in place after an adjustment has been made;
  • Lever All through arm 58 is connected to a dashpot 60 to retard the opening movement of the secondary throttle valve untilthe engine has had sufiicient time to respond to the-opening of the primary throttle valve.
  • This arrangement gives a higher air velocity for engine acceleration and a larger volume of fuel-air mixture for high power output and-speed after acceleration.
  • the dashpot which maybe built integrally with the carburetor, using'fuel from thegfuel bowl as the hydraulic fluid, is shown mounted on the side of the carburetor as aself-contained unit, consisting of cylinder 62 and-a pistonfimconnected' to arm 58 by a rod 68.
  • A-calibrated orificefiB is provided in piston 64 to permit the fluid beneath the piston to pass slow-ly'to the spaceabove' the piston as the secondary throttle valve is urged to its open position by spring 48 after the primary throttle valve has been opened sufliciently to cause lever 30 to engage lug 52 and move lever 38 in the clockwise direction.
  • a bimetallic thermostatic element having a finger 'IZiOr'engaging a lever'i3 is provided to positively hold the throttle valve 26B closed while the engine is cold, lever 13 being rigidly secured to shaft 42 and adapted to rotate in unison with lever 45 and arm 58.
  • the thermostat is disposed in a housing 14 and secured to the wall thereof by a rivet 16 or the like. Heated air from a stove or the like (not shown) adjacent the exhaust manifold of the engine is drawn by intake manifold vacuum through tube 18 around thermostat ill in the housing and thence through tube 88 to the intake manifold l2.
  • the choke valve which is preferably of the automatic type, is also gradually opened as the engine becomes warm. After the engine has become fully warm and thermostat 10 isfully withdrawn from lever 13, the opening movement of the primary throttle valve beyond the point at which lever 30 engages lug 52 of lever 38 moves rod 44 downwardly, compressing spring 48, which in turn urges lever 40 in the direction to open the secondary throttle valve 20B.
  • the opening movement of the throttle valve 2GB is retarded by dashpot 60 so that the air now through the primary induction passage will have time to increase to the amount corresponding substantially to the increased throttle opening, beforethe secondary system becomes effective.
  • arm 54 engages lever38 and through rod- 44 and lever 40 positively moves secondary throttle valve 203 toward closed position.
  • thermostatic means for holding throttle valve20B in its closed position may be of any other suitable. type than that shown in the drawings, or said throttle valve may be controlled by the thermostat of the automatic choke.
  • each system may include a plurality of induction passages containing throttle valves actuated by a control mechanism such as the one shown in the drawin'gsi- Further modifications may be made to suit requirements.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a secondaryinduction passage having a throttle therein, a means for positively opening said primary throttle, a linkage connecting said throttles and having a yieldable connection therein, and a dashpot'for retarding the opening movement of said secondary throttle to permit the primary throttle to open fully before the secondary throttle has opened fully.
  • a carburetor for an internal combustion engine comprising aprimary induction passage having a throttle therein, a secondary induction passage having a throttle therein, a linkage COI'lHECt-v ing said throttles and having a yieldable connection thereima dashpot for retarding the opening movement of said secondary throttle-to permit the primary throttle to open before the secondary throttle is opened, and a thermostatic means for holding said secondary throttle closed when the engine is cold.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a manually actuated means for positively opening said primary throttle, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable means therein and including a lost motion connection to permit the primary throttle to open to a predetermined position before the secondary throttle is opened, and a dashpot for retarding the opening movement of said secondary throttle.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein adapted to be manually actuated, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable means therein and including a lost motion connection to permit the primary throttle to open to a predetermined position before the secondary throttle is opened, a dashpot for retarding the opening movement of said secondary throttle, and a thermostatic means for positively holding said secondary throttle in closed position when the engine is cold.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for positively actuating said throttle, and a secondary induc tion passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened, a lost motion connection between said linkage and said primary throttle lever, and a means for retarding the opening movement of said secondary throttle.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for positively actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened and to positively close the secondary throttle as the primary throttle is closed, a lost motion connection between said linkage and said primary throttle lever, and a dashpot for retarding the opening movement of said secondary throttle.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened, a lost motion connection between said linkage and said primary throttle lever, a means for retarding the opening movement of said secondary throttle, and a means responsive to engine temperature for holding said secondary throttle in closed position when the engine is cold.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle and a choke therein, a lever for actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened and to positively close the secondary throttle as the primary throttle is closed, a lost motion connection between said linkage and said primary throttle lever, a dashpot for retarding the opening movement of said secondary throttle, and a means responsive to enginetemperature for positively holding said secondary throttle closed when the choke in the primary induction passage is efiective to restrict the flow of air therethrough.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a means for positively opening said primary throttle, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable connection therein, and a means for retarding the opening movement of said second ary throttle.
  • a carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable connection therein, a means for retarding the opening movement of said secondary throttle,

Description

Patented Sept. 9, 1952 UNITED srAras PATENT OFFICE BendixAviation Corporation, South Bend, Ind., a corporation of. Delaware 1.
Application March '7, 1950,*Serial No. 1f1 8,1'98
The present invention relates to carburetors for internal combustion engines, and more particularly to carburetorsof the multiple stage type for automotive engines.
In the operation of a multiple stage carburetor having primary and secondary induction systems, only the primary system is employed at lower engine speeds so that relatively high air velocities will be maintained in the induction passage to give agreater effectivesuction for fueldelivcry and thus a more positive control over fuel metering and distribution during the period, of-
relatively low airflow. Withthe acceleration of the engine to the higher speed ranges, the secondary induction system becomes operative to increase the volume offuel-air delivery sufficient- 1y tobbtain maximum power output and speed of the engine. The present invention is 'prin cipally concerned with a mechanism for control: ling, themsecondary induction system in response to throttle position in the primary induction sys-. tem and touthe temperature of the ,engine, o'ne of the objects'of the invention being to provide a temperature responsive means for rendering the control mechanism ineffective to actuate the secondary system until the engine hasvreached a predetermined temperature. l n
Anotherobject of the invention is toprovide a carburetor having a primary and a'secondary induction system wherein the'secondary system is controlled in response to throttle position in the primary system and isbrought into operation gradually as the, engine accelerates.
Another object of the invention is to provide, in a multiple stage carburetor havingamechanism controlled in accordance with the movement of throttle valve in the primary system for controlling the throttle valve of the secondary system, a temperature responsive means'for posi-- tively; preventing the secondary throttle valve fromioperatin'g while the engine is cold.
Another object-is to provide in a multiple stage Claims. (01.123-127).
carburetor of the aforesaid type a mechanism primary system, wherein the secondarysystem remainsinefiective while the choking device is effective l t l :Additional objects and advantages: will become a :-:*2 p apparent from the following description and accompanying drawings, wherein:
. Figure l-is a side elevation of a multiple stage carburetor showing certain elements of thecontrol mechanism for the secondary induction system in cross-section; 1
Figure 2 is a partial side elevation of a multiple stage carburetor showingportions of the control mechanism of the secondary induction system in cross section as in Figure 1, but in a different operative position; and
Figured is a view of certain levers forminga part i of l the control mechanism.
Referring more'specifically to the drawings, and to Figure l in particular, a multiple stage carburetor" generally designated by numeral In is shown mounted on an intake manifold I2 of'an internal combustion engine (not shown) and contains a-pr'imaryinductionsystem |4Aand a sec ondary induction system I4B,in'cluding induction passages IBA'and 18B, throttles 20A and 20B and main discharge jets 22A and 223, respectively. The two systems are provided with separate idle systems, fuel inlet valves and float chambers and are adapted to discharge the fuel-air mixture directly into intake manifold 12. A single accelerating pump (not shown), which may be either a mechanical or a vacuum type pump, is adapted to discharge into the primary induction system as the primary throttle is opened. In the present carburetor only the primary induction system is controlled by a choke valve 24, preferably of the unbalanced type, mounted in the airinlet of the induction passage 18A on a shaft 26, said choke valve being controlled either by a manual means or by an automatic choking device having a thermostatic element and a vacuum actuated means.
The throttle valve 20A. of the primary inducetion system is manually actuated by the operator through lever 30 mounted on one end of throttle shaft 32 and is regulated in the degree of closing by a stop 'screw' 34 on said lever and a fast idle cam 36 controlled through a linkage (shown in part at 31) by a choke control mechanism (not shown) The throttle valve 20B of the secondary induction passage is controlled by the primary throttle valve through a linkage consisting of a lever 3Brotatably mounted on one endof shaft 32, a lever 40 rigidly mounted-on one end of throttle shaft 42 of the secondary throttle valve 20B and a rod 44 interconnecting levers 3B and 40, said rod being pivotally connected to theiree end'o'f'lever 38 and to lever 40 by a trunnion.
through which saidrod is adapted to slide. The
3 force tending to open the secondary throttle valve as the primary throttle valve is opened is transmitted from rod 44 through a coil spring 48 mounted on said rod and reacting between a fixed collar 58 and trunnion 46. Lever 38 is actuated in the direction to open the secondary throttle valve by lever 30 through a one-way connection consisting of a' 11'1g52fi0n lever '38 adapted to be engaged by lever 30 as said latter lever is moved in the opening direction. The position of lever 38 in relation to lever 30 is such that the primary throttle valve must be moved to partially opened position before the secondary throttle valve is unobstructed by said thermostat. Spring 48 which forms a yieldable connection between levers 38 and 40 permits the primary throttle valve to be moved to its wide open position while the secondary throttle valve is held closed by thermostatic element 10.
In the operation of the present carburetor, starting with the engine cold, the choke valve 24 will beclosed and the secondary throttle valve will be held in its latched position by the finger 12 of thermostat l0 hooked over the end of lever 73. During the warm-up period, the primary induction system is the sole source of fuel-air mixmoved toward open position, though the movement of the primary throttle valve after the secondary throttle valve has started to open is sufficient to fully open the secondary throttle valve. An arm 54 on lever is adapted to engage lever 38 as the primary throttle valve is movedtoward closed position and to positively move said lever in the direction to close the secondary throttle .valve. The effective length of rod 44 in transmitting the closing movement of lever 38 to lever may be adjusted b moving nuts '55 and 56 upwardly or downwardly on rod 44, nut 56 being used to lock nut in place after an adjustment has been made;
Lever All through arm 58 is connected to a dashpot 60 to retard the opening movement of the secondary throttle valve untilthe engine has had sufiicient time to respond to the-opening of the primary throttle valve. This arrangement gives a higher air velocity for engine acceleration and a larger volume of fuel-air mixture for high power output and-speed after acceleration. The dashpot, which maybe built integrally with the carburetor, using'fuel from thegfuel bowl as the hydraulic fluid, is shown mounted on the side of the carburetor as aself-contained unit, consisting of cylinder 62 and-a pistonfimconnected' to arm 58 by a rod 68. ;A-calibrated orificefiB is provided in piston 64 to permit the fluid beneath the piston to pass slow-ly'to the spaceabove' the piston as the secondary throttle valve is urged to its open position by spring 48 after the primary throttle valve has been opened sufliciently to cause lever 30 to engage lug 52 and move lever 38 in the clockwise direction. Apassage having a check valve GQthereinis provided in piston E ite permit the rapid return of the secondary throttle valve to its closed position. r
- v To prevent the secondarythrottle valve from opening before the engine becomes warm, a bimetallic thermostatic element having a finger 'IZiOr'engaging a lever'i3 is provided to positively hold the throttle valve 26B closed while the engine is cold, lever 13 being rigidly secured to shaft 42 and adapted to rotate in unison with lever 45 and arm 58. The thermostat is disposed in a housing 14 and secured to the wall thereof by a rivet 16 or the like. Heated air from a stove or the like (not shown) adjacent the exhaust manifold of the engine is drawn by intake manifold vacuum through tube 18 around thermostat ill in the housing and thence through tube 88 to the intake manifold l2. When the engine is cold, the free arm of the thermostat assumes the posi tion shown in Figure l with finger 12 hooked over one end of lever 13, said end being beveled to permit the throttle valve 203 to close after the thermostat has moved to the position shown in Figure 1. As the engine becomes warm, the free arm of the thermostat moves to the right, as shown in Eigure 2 sufficiently to free lever 13 and permit saidlever and throttle valve -20B touotate i ture for the engine at part and wide open throttle operationsthough during idling the idling systerns of'both the primary and secondary induction systems are in operation regardless of temperature. As the engine becomes warm, the heated air drawn from the stove around the exhaust manifold passes through housing 14, heating thermostat 10 and causing it to move in the direction to release lever 13. The choke valve, which is preferably of the automatic type, is also gradually opened as the engine becomes warm. After the engine has become fully warm and thermostat 10 isfully withdrawn from lever 13, the opening movement of the primary throttle valve beyond the point at which lever 30 engages lug 52 of lever 38 moves rod 44 downwardly, compressing spring 48, which in turn urges lever 40 in the direction to open the secondary throttle valve 20B. The opening movement of the throttle valve 2GB is retarded by dashpot 60 so that the air now through the primary induction passage will have time to increase to the amount corresponding substantially to the increased throttle opening, beforethe secondary system becomes effective. When the primary throttle valve is moved toward, closed position, arm 54 engages lever38 and through rod- 44 and lever 40 positively moves secondary throttle valve 203 toward closed position.
Many modifications may be made in the present device without departing from the scope of the present invention, for example; the thermostatic means for holding throttle valve20B in its closed positionmay be of any other suitable. type than that shown in the drawings, or said throttle valve may be controlled by the thermostat of the automatic choke. Further, while only one induction passage for each of the two systems is shown, each system may include a plurality of induction passages containing throttle valves actuated by a control mechanism such as the one shown in the drawin'gsi- Further modifications may be made to suit requirements. i i
l. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a secondaryinduction passage having a throttle therein, a means for positively opening said primary throttle, a linkage connecting said throttles and having a yieldable connection therein, and a dashpot'for retarding the opening movement of said secondary throttle to permit the primary throttle to open fully before the secondary throttle has opened fully.
2. A carburetor for an internal combustion engine comprising aprimary induction passage having a throttle therein, a secondary induction passage having a throttle therein, a linkage COI'lHECt-v ing said throttles and having a yieldable connection thereima dashpot for retarding the opening movement of said secondary throttle-to permit the primary throttle to open before the secondary throttle is opened, and a thermostatic means for holding said secondary throttle closed when the engine is cold.
8. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a manually actuated means for positively opening said primary throttle, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable means therein and including a lost motion connection to permit the primary throttle to open to a predetermined position before the secondary throttle is opened, and a dashpot for retarding the opening movement of said secondary throttle.
4. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein adapted to be manually actuated, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable means therein and including a lost motion connection to permit the primary throttle to open to a predetermined position before the secondary throttle is opened, a dashpot for retarding the opening movement of said secondary throttle, and a thermostatic means for positively holding said secondary throttle in closed position when the engine is cold.
5. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for positively actuating said throttle, and a secondary induc tion passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened, a lost motion connection between said linkage and said primary throttle lever, and a means for retarding the opening movement of said secondary throttle.
6. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for positively actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened and to positively close the secondary throttle as the primary throttle is closed, a lost motion connection between said linkage and said primary throttle lever, and a dashpot for retarding the opening movement of said secondary throttle. V
7. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a lever for actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened, a lost motion connection between said linkage and said primary throttle lever, a means for retarding the opening movement of said secondary throttle, and a means responsive to engine temperature for holding said secondary throttle in closed position when the engine is cold.
8. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle and a choke therein, a lever for actuating said throttle, a secondary induction passage having a throttle therein, a linkage including a means adapted to yieldably urge said secondary throttle in the opening direction as the primary throttle is opened and to positively close the secondary throttle as the primary throttle is closed, a lost motion connection between said linkage and said primary throttle lever, a dashpot for retarding the opening movement of said secondary throttle, and a means responsive to enginetemperature for positively holding said secondary throttle closed when the choke in the primary induction passage is efiective to restrict the flow of air therethrough.
9. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a means for positively opening said primary throttle, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable connection therein, and a means for retarding the opening movement of said second ary throttle.
10. A carburetor for an internal combustion engine comprising a primary induction passage having a throttle therein, a secondary induction passage having a throttle therein, a linkage connecting said throttles and having a yieldable connection therein, a means for retarding the opening movement of said secondary throttle,
and a means responsive to engine temperature for holding said secondary throttle valve closed when the engine is cold.
ALBERT H. WINKLEIR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Winkler Sept. 7, 1943
US2609807D winkler Expired - Lifetime US2609807A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732191A (en) * 1956-01-24 smitley
US2749100A (en) * 1953-04-27 1956-06-05 Carter Carburetor Corp Throttle control for two-stage carburetor
US2749099A (en) * 1952-06-25 1956-06-05 Gen Motors Corp Throttle operating mechanism
US2836403A (en) * 1955-01-03 1958-05-27 Forgaz Ag Carburetor
US2838293A (en) * 1956-04-05 1958-06-10 Acf Ind Inc Secondary-stage throttle control for a multistage carburetor
DE1038340B (en) * 1956-04-30 1958-09-04 Daimler Benz Ag Register carburetor for motor vehicle internal combustion engines
DE1054783B (en) * 1956-08-09 1959-04-09 Daimler Benz Ag Multi-stage or composite carburetors for internal combustion engines
DE1104261B (en) * 1955-03-30 1961-04-06 Bendix Corp For internal combustion engine carburetors, a piston-cylinder arrangement serving as an accelerator pump or damping device
US2990823A (en) * 1958-12-08 1961-07-04 Holley Carburetor Co Vacuum controlled dampening device for secondary throttles
US3272483A (en) * 1965-06-10 1966-09-13 Acf Ind Inc Carburetor
US3319945A (en) * 1965-04-29 1967-05-16 Person Lawrence Carburetor construction
US3328008A (en) * 1965-09-23 1967-06-27 Acf Ind Inc Carburetor
DE2135824A1 (en) * 1971-07-17 1973-02-01 Bosch Gmbh Robert ELECTRIC FUEL INJECTION DEVICE FOR COMBUSTION MACHINES WITH A THROTTLE FLAP IN THE SUCTION MANIFOLD AND WITH A FLAP FOR MEASURING THE AIR QUANTITY
EP0043905A1 (en) * 1980-07-14 1982-01-20 Nissan Motor Co., Ltd. Secondary throttle valve opener for a two barrel carburetor
DE3842801A1 (en) * 1988-12-20 1990-06-21 Vdo Schindling Closing dashpot designed to damp the return movement of a throttle valve of a throttle housing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090246A (en) * 1934-12-19 1937-08-17 Alexander William Throttle control device for automobiles
US2179788A (en) * 1937-11-05 1939-11-14 Hinton Accelerator governor linkage
US2254834A (en) * 1940-09-27 1941-09-02 Betry Owen Charles Dual carburetor control
US2323442A (en) * 1941-12-06 1943-07-06 George M Holley Manifold
US2328763A (en) * 1943-09-07 winkler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328763A (en) * 1943-09-07 winkler
US2090246A (en) * 1934-12-19 1937-08-17 Alexander William Throttle control device for automobiles
US2179788A (en) * 1937-11-05 1939-11-14 Hinton Accelerator governor linkage
US2254834A (en) * 1940-09-27 1941-09-02 Betry Owen Charles Dual carburetor control
US2323442A (en) * 1941-12-06 1943-07-06 George M Holley Manifold

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732191A (en) * 1956-01-24 smitley
US2749099A (en) * 1952-06-25 1956-06-05 Gen Motors Corp Throttle operating mechanism
US2749100A (en) * 1953-04-27 1956-06-05 Carter Carburetor Corp Throttle control for two-stage carburetor
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