US3928511A - Choke valve assembly - Google Patents

Choke valve assembly Download PDF

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Publication number
US3928511A
US3928511A US447238A US44723874A US3928511A US 3928511 A US3928511 A US 3928511A US 447238 A US447238 A US 447238A US 44723874 A US44723874 A US 44723874A US 3928511 A US3928511 A US 3928511A
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US
United States
Prior art keywords
shaft
choke
choke valve
turn
actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US447238A
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English (en)
Inventor
Minoru Atsumi
Toshimasa Shishido
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
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Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Application granted granted Critical
Publication of US3928511A publication Critical patent/US3928511A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/14—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on pressure in combustion-air- or fuel-air-mixture intake

Definitions

  • a choke valve assembly for the air intake passage of an internal combustion engine employs a shaft mounted off-center with respect to the passage, an actuator connected to turn the shaft in a direction to close the choke valve, a vacuum operated device for turning the shaft in a direction to open the choke valve when the engine starts, and a limiter member connected to limit the extent of opening movement of the choke valve in accordance with the position of the actuator.
  • a spring is operatively interposed between i the actuator and the choke valve so that the force of the spring increases as the actuator is moved beyond the position corresponding to the closed position of the choke valve.
  • a cam track on the actuator is engaged by a follower on the limiter member.
  • Another object of this invention is to mount the choke valve on a shaft positioned off-center with respect to the air intake passage, and to close the choke valve by means of a spring so that the spring force increases in accordance with increased movement of the choke knob beyond a position corresponding to closed position of the choke valve.
  • FIG. 1 is a side elevation, partly broken away, showing a preferred embodiment of this invention, the choke valve being shown in the open position.
  • FIG. 2 is a view similar to FIG. 1, certain parts being removed and separately shown, for clarity of illustration.
  • FIG. 3 is a view similar to FIG. 1, the control knob being moved to a first position, and the choke valve being shown in closed position.
  • FIG. 4 is a view similar to FIG. 3, the control knob being moved to a second position, and the choke valve being shown in closed position.
  • the intake passage '1 for an internal combustion engine is provided with a choke valve 2 fixed on a choke shaft 3 mounted to turn so that the choke valve 2 may be moved between the closed position shown in FIG. 3 and the open position shown in FIG. 1.
  • the shaft 3 is positioned to one side of the intake passage 1 so that the choke valve 2 is mounted off-center with respect to said passage.
  • a disk 4 is fixed to the projecting portion of the shaft so that it turns in unison with'the choke valve 2.
  • An actuator member 5 is mounted to turn on the shaft 3, and a coil spring 6 is provided between the disk 4 and the actuator member 5 so that the shoulder 4a on the disk 4 is resiliently urged into contact with the shoulder 5a on the actuator member 5.
  • a spring acts to move the actuator member 5 in a counterclo'ckwise direction, as shown in the drawings.
  • a choke cable 7 is pivotally connected'to the actuator member 5 at 7a and is connected to a manually operable knob 8 by way of a rod 8a.
  • a vacuum operated device generally designated 9 includes a pipe 10 which is subjected to vacuum presssure in the intake manifold of the engine.
  • the pipe 10 communicates with a vacuum pressure chamber 11 containing a coil compression spring 12 which acts against a flexible diaphragm l3. Suction pressure in the chamber 11 acts to move the diaphragm 13 in a direction to compress the spring 12.
  • a rotary stop element 14 is mounted to turn on the shaft 3 and is pivotally,
  • the stop element l4- carries a projecting arm 16. Suction pressure in the' chamber 11 serves to tension the connecting rod 15 to move the element 14 in a counterclockwise direction about the shaft 3.
  • the radial shoulder 14a on'the element 14 is positioned to engage the shoulder 4a on the disk 4 so that counterclockwise turning movement oftheele'ment l4 and arm 16 serves to turn the disk 4 and the shaft 3 and choke valve 2 in the same direction.
  • This cam follower 18a contacts a cam track 19 provided on the actuator member 5, and is held in contact therewith by means of a spring, not shown.
  • the limiter 18 acts to limit the extent of movement of the arm 16 undertension force of the connecting rod 15. This intum serves to limit the extent of opening movement of the choke valve 2 from closed position when the knob 8 is retracted to a greater extent than shown in FIG. 3. The greater the extent of retraction of the knob 8 beyond this position, the further the follower 18a moves away from the axis of the choke shaft 3 along the camtrack 19. 7
  • the disk 4 is also referred to'as thefir'st element and the rotary stop element 14 is also-referred to as the second element.
  • the choke valve 2 is to be leftinopen position as shown in FIG. 1, when the engine to be started is still warm following previous operation.
  • the manual knob 8 remains in theoff position.
  • the actuator member '5 rests in the position shown in FIG. 1, under the action of aspring, not shown.
  • the coil spring 6 holds the disk 4'in position with respect 'to the actuator member 5, and the disk 4 acting through the shaft 3 holds the "choke valve 2 in the fully open position.
  • the vacuum pres sure in the chamber 11 then causes the connecting rod 15 to move'to the right, thereby swinging the stop element 14 and arm 16 in'ac'ounterclockwise direction, by reason of the contact of the shoulder 14a of the element 14 with the shoulder 4a on the disk 4.
  • the arm 16 on the element 14 does not engage the upper end of the limiter arm 18 and therefore there is no effect on the counterclockwise movement of the disk 4 and the choke valve 2, corresponding to the full open position of the choke valve 2.
  • the rush of air in the intake passage 1 applies a force tending to turn the choke valve 2 toward open position, because of the off-center mounting of the choke valve 2 on the shaft 3.
  • the suction pressure in the chamber 11 also tensions the connecting rod to swing the stop element 14 in a counterclockwise direction.
  • the choke valve 2 remains in fully open position so long as the knob 8 is in the off position, as shown in FIG. 1. Moreover, the choke valve moves from fuly closed to an intennediate position as soon as fully engine starts and runs under its own power, the intermediate position depending upon the position of the manual knob 8 beyond the position shown in FIG. 3. The further the knob 8 is moved to the left, as viewed in the drawings, the closer the choke valve 2 remains to fully closed position, after the engine starts and runs under its own power. Also, because the choke valve 2 is eccentrically mounted on the choke shaft so that flow of air tends to move it toward open position, the force of the spring 6 increases as the knob 8 is moved beyond the position corresponding to the closed position of the choke valve 2.
  • a choke valve assembly for an air intake passage of an internal combustion engine, the combination of: a tumable choke shaft having a choke valve fixed thereto to control flow through said air intake passage, an actuator connected to turn the shaft in a direction to close the choke valve, the actuator being provided with a cam track, means responsive to engine vacuum pressure for turning the shaft in a direction to open the choke valve, and means including a limiter member connected to limit the extent of opening movement of the choke valve in accordance with the position of said actuator, said limiter member having a follower engaging said cam track.
  • a choke valve assembly for an air intake passage of an internal combustion engine, the combination of: a tumable choke shaft having a choke valve fixed thereto to control flow through said air intake passage, a first element fixed to the shaft, an actuator mounted to turn of the shaft and provided with a cam track, a spring operatively interposed between said first element and said actuator for turning movement, a second element mounted to turn on the shaft and having a projecting arm, a limiter member mounted to turn about an axis laterally spaced from said shaft and having a follower engaging said cam track, means whereby said second element may turn said first element until said projecting arm engages with said limiter member, manual means for turning the actuator in a direction to close the choke valve, and means responsive to engine vac uum pressure for turning said second element in a direction to open the choke valve.
  • a tumable choke shaft mounted off-center with respect to the air intake passage and having a choke valve fixed thereto to control flow through said passage, a first element fixed to the shaft, an actuator mounted to turn on the shaft and provided with a cam track, a spring operatively interposed between said first element and said actuautor for turning movement, a second element mounted to turn on the shaft and having a projecting arm, a limiter member mounted to turn about an axis laterally spaced from said shaft and having a follower engaging said cam track, means whereby said second element may turn said first element until said projecting arm engages with said limiter member, manual means for turning the actuator in one direction, and means responsive to engine vacuum pressure for turning said second element in the other direction.
  • a carburetor assembly the combination of: means forming a passage adapted to supply an air-fuel mixture to an internal combustion engine, a choke valve mounted on a shaft to turn in said passage, a choke actuating member mounted to turn about the axis of the choke shaft, said member having a cam surface thereon, a limiter mounted to turn about an axis spaced from the choke shaft, a follower on the limiter engaging the cam surface, a rotary stop element mounted to turn about the axis of the choke shaft, said rotary stop element having an element engageable with the limiter to limit the extent of opening movement of the choke valve, and a vacuum breaker connected to actuate said rotary stop element.
  • a carburetor assembly the combination of: means forming a passage adapted to supply an air-fuel mixture to an internal combustion engine, a choke valve mounted on a shaft to turn in said passage, a choke actuating member mounted to turn about the axis of the choke shaft, said member having a cam surface thereon, a limiter mounted to turn about an axis spaced from the choke shaft, a follower on the limiter engaging the cam surface, a rotary stop element mounted to turn about the axis of the choke shaft, said rotary stop element having an element engageable with the limiter to limit the extent of opening movement of the choke valve, a vacuum breaker connected to actuate said rotary stop element, and means including a follower engaging said cam surface for moving the throttle valve in accordance with movement of said choke actuating member.
  • a turnable choke shaft having a choke valve fixed thereto to control flow through said passage, means mounting the choke shaft in an off-center position with respect to said passage, a disk element fixed to the choke shaft rotary stop element in a direction corresponding to opening movement of the choke valve, the actuator 6 having a cam track, and a limiter engaging the cam track and positioned to limit turning movement of the rotary stop element in said direction.
  • a turnable choke shaft having a choke valve fixed thereto to control flow through said passage, means mounting the choke shaft in an off-center position with respect to said passage, a disk element fixed to the choke shaft and provided with a shoulder, an actuator operating to turn said disk element in a direction to close the choke valve and provided with a shoulder, a spring operatively interposed between said disk element and said actuator and acting to maintain said shoulders in contact, a stop element having a shoulder engageable with the shoulder on said disk element to limit the extent of turning movement of said disk element under force of said spring, means responsive to engine vacuum pressure for moving said stop element in a direction corresponding to opening movement of the choke valve, and a limiter connected to limit the extent of movement of the stop element in a direction to open the choke valve in accordance with the position of said actuator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US447238A 1973-03-06 1974-03-01 Choke valve assembly Expired - Lifetime US3928511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48025730A JPS5138392B2 (de) 1973-03-06 1973-03-06

Publications (1)

Publication Number Publication Date
US3928511A true US3928511A (en) 1975-12-23

Family

ID=12173909

Family Applications (1)

Application Number Title Priority Date Filing Date
US447238A Expired - Lifetime US3928511A (en) 1973-03-06 1974-03-01 Choke valve assembly

Country Status (17)

Country Link
US (1) US3928511A (de)
JP (1) JPS5138392B2 (de)
AR (1) AR209909A1 (de)
BE (1) BE811873A (de)
BR (1) BR7401617D0 (de)
CA (1) CA998898A (de)
CH (1) CH583375A5 (de)
CS (1) CS193029B2 (de)
DD (1) DD113077A5 (de)
DE (1) DE2410530C3 (de)
ES (1) ES423931A1 (de)
FR (1) FR2220680B1 (de)
GB (1) GB1465921A (de)
IT (1) IT1003707B (de)
NL (1) NL159473B (de)
SE (1) SE409488B (de)
SU (1) SU841602A3 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333889A (en) * 1981-04-10 1982-06-08 General Motors Corporation Carburetor vacuum break assembly
US4439377A (en) * 1981-03-03 1984-03-27 Regie Nationale Des Usines Renault Carburetor for an internal combustion motor
US4788014A (en) * 1986-05-28 1988-11-29 Sanshin Kogyo Kabushiki Kaisha Auto-choke device
US6779785B2 (en) * 2002-07-25 2004-08-24 Walbro Engine Management, L.L.C. Self-relieving choke adjustment apparatus
US20040187824A1 (en) * 2003-03-28 2004-09-30 Honda Giken Kogyo Kabushiki Kaisha Vacuum-operated choke system and method
US7611131B2 (en) * 2005-10-07 2009-11-03 Husqvarna Ab Carburetor start-stop mechanism
US20100308479A1 (en) * 2009-06-03 2010-12-09 Qian Chen Carburetor with a starter
CN107288779A (zh) * 2016-04-12 2017-10-24 哈尔滨飞机工业集团有限责任公司 一种控制发动机阻风门开度的操纵机构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528848Y2 (de) * 1976-03-25 1980-07-10
JPS52141520U (de) * 1976-04-22 1977-10-26
FR2393161A1 (fr) * 1977-06-02 1978-12-29 Sibe Perfectionnements aux carburateurs munis d'un volet de depart
DE2903602C2 (de) * 1979-01-31 1981-03-26 Pierburg GmbH & Co KG, 41460 Neuss Handstartvorrichtung für Vergaser von Brennkraftmaschinen
DE3143076A1 (de) * 1981-10-30 1983-05-11 Pierburg Gmbh & Co Kg, 4040 Neuss Handstartvorrichtung fuer vergaser
GB2135735B (en) * 1983-02-26 1987-02-11 Lawrence Albert Robertson Actuating carburettor choke valves
GB2210409B (en) * 1987-09-25 1992-06-03 Motaproducts Automotive Limite Improvements in or relating to carburettors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015753A (en) * 1933-01-25 1935-10-01 Bendix Aviat Corp Carburetor
US2065167A (en) * 1932-09-23 1936-12-22 Bendix Aviat Corp Choke valve
US2423059A (en) * 1943-02-18 1947-06-24 Bendix Aviat Corp Carburetor
US2764393A (en) * 1954-05-14 1956-09-25 Charles F Geyer Manually actuated control attachment for automatic choke
US3185453A (en) * 1961-07-17 1965-05-25 Sibe Carburetors
US3682149A (en) * 1970-08-19 1972-08-08 Robert D Mitchell Throttle lock-out arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893419A (en) * 1957-05-03 1959-07-07 Albert L Coulter Hand-choke conversion unit
US3249344A (en) * 1963-05-17 1966-05-03 Acf Ind Inc Carburetor
FR1436803A (fr) * 1965-03-18 1966-04-29 Sibe Perfectionnements apportés aux carburateurs à volet de départ et came de ralenti accéléré

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065167A (en) * 1932-09-23 1936-12-22 Bendix Aviat Corp Choke valve
US2015753A (en) * 1933-01-25 1935-10-01 Bendix Aviat Corp Carburetor
US2423059A (en) * 1943-02-18 1947-06-24 Bendix Aviat Corp Carburetor
US2764393A (en) * 1954-05-14 1956-09-25 Charles F Geyer Manually actuated control attachment for automatic choke
US3185453A (en) * 1961-07-17 1965-05-25 Sibe Carburetors
US3682149A (en) * 1970-08-19 1972-08-08 Robert D Mitchell Throttle lock-out arrangement

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439377A (en) * 1981-03-03 1984-03-27 Regie Nationale Des Usines Renault Carburetor for an internal combustion motor
US4333889A (en) * 1981-04-10 1982-06-08 General Motors Corporation Carburetor vacuum break assembly
US4788014A (en) * 1986-05-28 1988-11-29 Sanshin Kogyo Kabushiki Kaisha Auto-choke device
US6779785B2 (en) * 2002-07-25 2004-08-24 Walbro Engine Management, L.L.C. Self-relieving choke adjustment apparatus
US20040187824A1 (en) * 2003-03-28 2004-09-30 Honda Giken Kogyo Kabushiki Kaisha Vacuum-operated choke system and method
US6899072B2 (en) 2003-03-28 2005-05-31 Honda Motor Co., Ltd. Vacuum-operated choke system and method
US7611131B2 (en) * 2005-10-07 2009-11-03 Husqvarna Ab Carburetor start-stop mechanism
US20100308479A1 (en) * 2009-06-03 2010-12-09 Qian Chen Carburetor with a starter
US8136796B2 (en) * 2009-06-03 2012-03-20 Qian Chen Carburetor with a starter
CN107288779A (zh) * 2016-04-12 2017-10-24 哈尔滨飞机工业集团有限责任公司 一种控制发动机阻风门开度的操纵机构

Also Published As

Publication number Publication date
JPS49113044A (de) 1974-10-28
GB1465921A (en) 1977-03-02
AR209909A1 (es) 1977-06-15
NL159473B (nl) 1979-02-15
IT1003707B (it) 1976-06-10
BE811873A (fr) 1974-09-05
CA998898A (en) 1976-10-26
FR2220680B1 (de) 1982-05-28
BR7401617D0 (pt) 1974-11-19
SE409488B (sv) 1979-08-20
NL7402945A (de) 1974-09-10
DE2410530A1 (de) 1974-09-19
CH583375A5 (de) 1976-12-31
DD113077A5 (de) 1975-05-12
AU6596074A (en) 1975-08-28
CS193029B2 (en) 1979-09-17
DE2410530B2 (de) 1981-05-27
FR2220680A1 (de) 1974-10-04
DE2410530C3 (de) 1982-01-28
ES423931A1 (es) 1976-05-16
SU841602A3 (ru) 1981-06-23
JPS5138392B2 (de) 1976-10-21

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