US3741178A - Anti dieseling carburetor structures - Google Patents

Anti dieseling carburetor structures Download PDF

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Publication number
US3741178A
US3741178A US00186370A US3741178DA US3741178A US 3741178 A US3741178 A US 3741178A US 00186370 A US00186370 A US 00186370A US 3741178D A US3741178D A US 3741178DA US 3741178 A US3741178 A US 3741178A
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US
United States
Prior art keywords
shaft
housing
primary
barrel
carburetor
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
US00186370A
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English (en)
Inventor
R Cedar
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.)
Ford Motor Co
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Ford Motor Co
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Filing date
Publication date
Application filed by Ford Motor Co filed Critical Ford Motor Co
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Publication of US3741178A publication Critical patent/US3741178A/en
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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
    • F02M11/00—Multi-stage carburettors, Register-type carburettors, i.e. with slidable or rotatable throttling valves in which a plurality of fuel nozzles, other than only an idling nozzle and a main one, are sequentially exposed to air stream by throttling valve
    • F02M11/02—Multi-stage carburettors, Register-type carburettors, i.e. with slidable or rotatable throttling valves in which a plurality of fuel nozzles, other than only an idling nozzle and a main one, are sequentially exposed to air stream by throttling valve with throttling valve, e.g. of flap or butterfly type, in a later stage opening automatically
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S123/00—Internal-combustion engines
    • Y10S123/11—Antidieseling

Definitions

  • ABSTRACT An anti-dieseling two-stage carburetor structure for a gasoline internal combustion engine.
  • the carburetor includes a solenoid which determines distinct primary throttle blade positions at idle and at ignition-off.
  • lever system interconnects the solenoid and the secondary throttle plates.
  • the de-energized solenoid simultaneously causes the primary throttle plates to close completely and the secondary throttle plates to partially open.
  • the closing of the primary throttle plates stops any fuel flow resulting from airflow through the primary venturis, while the partial opening of secondary throttle plates bleeds air to the intake manifold and eliminates any fuel flow responsive to intake manifold vacuum.
  • the invention to be described provides means to eliminate such dieseling by venting the intake manifold to a source of atmospheric pressure immediately following the opening of the engine ignition. This rapidly decays the intake manifold vacuum and interminates the differential pressure responsive idle system fuel feed.
  • the invention further provides means to simultaneously close the primary throttle plates while the secondary throttle plates of a two-stage carburetor are being opened to stop the primary airflow and its corresponding fuel flow.
  • the invention further provides an anti-dieseling means that is readily adaptable to use with conventional carburetors, that can be easily and economically installed as a field improvement or in initial production and that is reliable andeffective in operation.
  • a carburetor constructed in accordance with this invention includes primary and secondary barrels formed in a housing.
  • a first shaft extends across a primary barrel and protrudes from the housing.
  • a second shaft extends across a secondary barrel and protrudes from the housing.
  • Primary and secondary throttle plates are mounted on the shafts and are pivotal together with their respective shafts to open and close the barrels.
  • a variable position abutment member is fixed relative to the housing and has an element movable to predetermined stop positions.
  • a first lever is secured to the first throttle shaft and is engagable with the abutment member element.
  • a second lever means is secured to the second shaft.
  • a lost motion connection joins the first lever and the second lever to displace the second lever in response to movement of the abutment member element.
  • the abutment member Upon opening the engine ignition circuit the abutment member assumes a new position. This results in the complete closing of the primary throttle plate to stop any fuel flow resulting from airflow through the primary barrel and the partial opening of the secondary throttle plate to bleed atmospheric air into the intake-manifold and stop any fuel flow resulting from intake manifold vacuum.
  • FIG. 1 of the drawing is a perspective view of a portion of a four-barrel, two-stage carburetor incorporating the invention.
  • FIG. 2 is a side elevational view taken in the direction ofthe arrow of FIG. 1 and showing certain levers on the side opposite in broken lines.
  • numeral It refers to a portion of the housing of a four-barrel, two-stage carburetor.
  • the housing includes an intermediate portion 12 in which the venturis (not shown) are formed and a bottom flange portion 14 which is positioned for attachment on the intake manifold (not shown).
  • a pair of primary throttle plates 16 are mounted on shaft 18 which extends transversely through the carburetor flange 14 and protrudes from both sides.
  • Primary throttle plates'and LII shaft are pivotally mounted to the flange portion and open and close the primary barrels 20 of the two-stage carburetor.
  • the secondary throttle plates 22 are mounted on shaft 24 which extends transversely through the carburetor flange and protrudes from both sides.
  • the secondary throttle plates and shaft are pivotally mounted relative to the flange portion to open and close the secondary barrels 26 of the carburetor. Both the primary and secondary plates are biased toward a closed position.
  • the invention controls the position and the relationship of the throttle plates only at engine idle and ignition off. It does not affect or interfere with the normal operation and control of the throttle plates during other operations of the carburetor and engine. Consequently, only the throttle plate control levers directly involved in the functioning of this invention will be discussed in the following paragraphs. Other conventional carburetor controls will not be considered.
  • Lever 28 is affixed to one end of primary throttle shaft 18 and is biased toward an abutment member or solenoid 30.
  • the solenoid has a movable element or armature 32 engagable with the lever 28 at point 29 to position the primary throttle plates 16 in a slightly open position at idle and to completely close the primary throttle plates when the solenoid is de-energized upon opening the ignition circuit 33.
  • the solenoid is spring biased to the closed throttle plate position.
  • a second lever 34 is secured to the primary throttle shaft 18 on the end opposite lever 28 and is movable together with the shaft and the first lever 28.
  • a third lever 36 is secured to the protruding end ofthe secondary throttle plate shaft 24 on the end adjacent to the second lever 34.
  • the lost motion connection takes the form of a freely rotatable lever mounted to shaft 18 adjacent second lever 34 and engagable with the second and third levers during portions of their travel.
  • the counterclockwise movement of the first lever 28 and second lever 34 from idle to wide open throttle does not affect the position of the lost motion lever 38; however, clockwise movement of the first and second levers from idle position to ignition-off position causes the lost motion lever to be displaced clockwise because of the engagement between the two levers at portion 40.
  • the displacement of the lost motion lever in turn, displaces clockwise the third lever means 36 because of contact at point 42 and causes the secondary throttle plate 22 to move from a completely closed position to a slightly open position.
  • OPERATION 16 are slightly open and the secondary throttle plates are completely closed.
  • the effect of these displacements is to check the airflow through the primary barrels of the carburetor and the venturi fuel flow associated therewith and to vent the intake manifold to atmosphere via the secondary barrels and stop the idle system fuel flow dependent on intake manifold vacuum pressure. There is then essentially no fuel being admitted to support dieseling or combustion following ignition shut-off. It is to be noted that the idle system is of conventional design in which a small amount of fuel may be drawn even when the primary throttle plate is closed if a sufficient manifold vacuum is maintained.
  • lever 34 could be slotted and interconnected to lever 36 by a link having one end slidable with the slot.
  • said carburetor having primary and secondary air fuel induction passages
  • said carburetor including a housing
  • a throttle valve pivotally mounted within said induction passage to open and close said induction passage
  • variable position abutment member having an element movable relative to said housing to predetermined stop positions
  • valve means to open and close said second passage
  • motion transfer means interconnecting the abutment member element and the valve means to move said valve means and to vent said induction passage in response to movements of said abutment member element.
  • said carburetor including a housing
  • said first plate and shaft being pivotal to open and close said primary barrel
  • said second plate and shaft being pivotal to open and close said secondary barrel
  • variable position abutment member fixed relative to said housing having an element movable to predetermined stop positions
  • lost motion connection means joining said first level means and said second lever means constructed to displace said second lever means in response to movement of abutment member element.
  • said carburetor including a housing
  • said first plate and shaft being pivotal to open and close said primary barrel
  • said second plate and shaft being pivotal to open and close said secondary barrel
  • variable position abutment member fixed relative to said housing having an element movable to an idle position and an ignition-off position
  • first lever means secured to said first shaft external to said housing engagable with said abutment member element and positionable in an idle or ignition-off position
  • lost motion connection means joining said first lever means and said second lever means constructed to displace said second lever during the range of displacement of said first lever means from idle to ignition-off position.
  • said carburetor including a housing
  • said first plate and shaft being pivotal to open and close said primary barrel
  • said second plate and shaft being pivotal to open and close said secondary barrel
  • a solenoid fixed relative to said housing having an element movable to an idle position and an ignitionoff position
  • first lever means secured to said first shaft external to said housing engagable with said solenoid and positionable in an idle or ignition-off position

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US00186370A 1971-10-04 1971-10-04 Anti dieseling carburetor structures Expired - Lifetime US3741178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18637071A 1971-10-04 1971-10-04

Publications (1)

Publication Number Publication Date
US3741178A true US3741178A (en) 1973-06-26

Family

ID=22684678

Family Applications (1)

Application Number Title Priority Date Filing Date
US00186370A Expired - Lifetime US3741178A (en) 1971-10-04 1971-10-04 Anti dieseling carburetor structures

Country Status (6)

Country Link
US (1) US3741178A (de)
JP (1) JPS5517226B2 (de)
AU (1) AU470327B2 (de)
CA (1) CA973040A (de)
DE (1) DE2248650A1 (de)
GB (1) GB1396023A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016852A (en) * 1975-04-19 1977-04-12 Toyota Jidosha Kogyo Kabushiki Kaisha Apparatus for preventing after-burning in internal combustion engine
US5050548A (en) * 1988-06-24 1991-09-24 Fuji Jukogyo Kabushiki Kaisha Diesel engine shut-down device
US5394846A (en) * 1993-08-09 1995-03-07 Brunswick Corporation Throttle body assembly
US20060244158A1 (en) * 2005-04-04 2006-11-02 Grant Barry S Carburetor valve control linkage
US20140261311A1 (en) * 2013-03-14 2014-09-18 Generac Power Systems, Inc. Fuel mixer
US10343692B2 (en) * 2016-09-09 2019-07-09 Hyundai Motor Company Method and apparatus for preventing dieseling of engine for mild hybrid electric vehicle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5326608B2 (de) * 1974-03-15 1978-08-03
JPS51106228U (de) * 1975-02-24 1976-08-25
JPS59179176A (ja) * 1983-03-30 1984-10-11 Topy Ind Ltd 無限軌道帯の塗装装置
JPS59176396U (ja) * 1983-05-12 1984-11-26 東洋電機製造株式会社 車両駆動用誘導電動機の制御装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016852A (en) * 1975-04-19 1977-04-12 Toyota Jidosha Kogyo Kabushiki Kaisha Apparatus for preventing after-burning in internal combustion engine
US5050548A (en) * 1988-06-24 1991-09-24 Fuji Jukogyo Kabushiki Kaisha Diesel engine shut-down device
US5394846A (en) * 1993-08-09 1995-03-07 Brunswick Corporation Throttle body assembly
US20060244158A1 (en) * 2005-04-04 2006-11-02 Grant Barry S Carburetor valve control linkage
US7343896B2 (en) * 2005-04-04 2008-03-18 Grant Barry S Carburetor valve control linkage
US20140261311A1 (en) * 2013-03-14 2014-09-18 Generac Power Systems, Inc. Fuel mixer
US10343692B2 (en) * 2016-09-09 2019-07-09 Hyundai Motor Company Method and apparatus for preventing dieseling of engine for mild hybrid electric vehicle

Also Published As

Publication number Publication date
JPS4844631A (de) 1973-06-27
DE2248650A1 (de) 1973-04-12
AU4667272A (en) 1974-03-21
JPS5517226B2 (de) 1980-05-09
CA973040A (en) 1975-08-19
GB1396023A (en) 1975-05-29
AU470327B2 (en) 1976-03-11

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