US3678911A - Switching-off device for internal combustion engine fed by a dual-body carburetor - Google Patents

Switching-off device for internal combustion engine fed by a dual-body carburetor Download PDF

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Publication number
US3678911A
US3678911A US50626A US3678911DA US3678911A US 3678911 A US3678911 A US 3678911A US 50626 A US50626 A US 50626A US 3678911D A US3678911D A US 3678911DA US 3678911 A US3678911 A US 3678911A
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US
United States
Prior art keywords
engine
idling
carburettor
tubes
switching
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
US50626A
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English (en)
Inventor
Jean-Pierre Soubis
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Chrysler France SAS
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Chrysler France SAS
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Filing date
Publication date
Application filed by Chrysler France SAS filed Critical Chrysler France SAS
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Publication of US3678911A publication Critical patent/US3678911A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2710/00—Control of valve gear, speed or power
    • F01L2710/006—Safety devices therefor
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/4304—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working only with one fuel
    • F02M2700/4311—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working only with one fuel with mixing chambers disposed in parallel
    • 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 [30] Foreign Application Priority Dam Modern high-performance combustion engines heve the drawback of contmumg to run at 1dl1ng speed during a certam July 16, 1969 France ..6924230 period when switched off. A known method used to avoid this phenomenon consists in shutting off the arrival of gasoline 52 us. c1 ..123 127, 123/198 DB, [23/198 DC, into the idling Circuit Ofthe carburetor.
  • a known method used to avoid this phenomenon consists in shutting off the arrival of gasoline into the idling circuit of the carburettor by using an electro-magnetic valve constituted by a needle mounted in the idling tube of the carburettor, the said needle being controlled by an electro-magnet.
  • the electro-magnet is fed, the electro-magnetic valve is open and, therefore, the fuel may pass through the idling tube.
  • the current feeding the electro-magnetic valve is also switched off, the latter is closed and, therefore, the fuel can no longer circulate in the idling circuit of the carburettor.
  • the engine which is no longer fed with fuel, stops.
  • the invention is concerned more particularly with high-performance internal combustion engines fed by a dual-body carburettor.
  • a dual-body carburettor two idling circuits are provided. If the stopping of the engine is to be obtained by the known method just described, it is therefore necessary to provide a duplication of the switching-off devices otherwise stated, it is necessary to provide two electro-magnetic valves controlled electrically in parallel and mounted on each of the idling tubes of the carburettor.
  • the normal richness of an idling circuit is usually on the order of 1.30. This richness is defined as being the air/fuel ratio used, taking as a reference a ratio equal to 1 when the relative amounts of air and fuel correspond to a theoretical complete combustion.
  • the dual-body carburettor C comprises a feeding constantlevel or float chamber 12, the float of which is seen at 11 and which supplies fuel through a tube 13 to two nozzles l4, 14' mounted in the Venturi throats l5, 15' of the two bodies 16, 16' of the carburettor.
  • the flow sections I6, 16 forming combustible gaseous mixture inlet tubes are controlled in parallel and simultaneously by two inlet butterfly valves or flaps l7, 17 which are controlled from the acceleration pedal (not shown).
  • both barrels I6 and 16 as well as the idling tubes 18 and I8 feed into a common manifold 31 for all of the engine cylinders.
  • a fuel path from the bowls liquid fuel 10 into the idle passages 18 and 18' is formed by way of the nozzles 30 and 30' respectively.
  • the air flows in the direction indicated by the arrows in the drawings, with part of the air flowing around the butterfly valves 17, 17' even when the latter are closed, as indicated by the arrows f.
  • the electro-magnetic valve 19, referred to below, is activated by the ignition circuit, as indicated.
  • the arrangement is such that when the engine is switched on, the electro-magnetic valve 19 is fed, its plunger 20 is attracted and the valve 21 is displaced away from its seat 22, thus freeing the channel I8 as shown in the drawing.
  • the channel 18' remains open, but it is surprisingly observed that when the switching off is effected, contrary to all expectations, the engine immediately stops, for it is not subjected to the self-ignition phenomenan which should normally persistently occur owing to weak feeding with fuel resulting from the presence of the single idling channel 18'
  • the invention is by no means limited to the form of embodiment described, the means of control of the closing of the switching-off member being, in particular, of any suitable type.
  • the electro-magnet controlling the closing of the needle may in particular be replaced if desired by a mechanical device connected or not with the engine switching control.
  • the invention therefore comprises all technical equivalents to the means described as well as their combinations if the latter are carried out according to its spirit.
  • idling tubes 18 and 18 there are a pair of idling tubes 18 and 18.
  • One of these tubes, namely the tube 18', is maintained at all times permanently free and unobstructed, so that fluid can flow therethrough at any time.
  • the closure means 19 has a nonnally closed position and coacts only with the other idling tube 18 for closing the latter automatically when the engine is not operating
  • This closure means 19 responds to operation of the engine for opening the idling tube 18.
  • this closure means 19 takes the form of the above-described electro-magnetic valve which, when unenergized, assumes its nonnal position closing the tube 18. This valve becomes energized when the engine operates to assume the open position opening the idling tube 18.
  • a switching-off device preventing the operation of the engine fed with fuel through the idling tubes of the carburettor subsequent to the switching off of the electric ignition circuit of the engine, said device comprising only one member for stopping the feeding with fuel, which member is placed on only one of the two idling tubes of the carburettor, means of control of the closing of the said stopping member being provided so as to be actuated simultaneously with the operation of switching off of the engine ignition circuit, said carburettor having two barrels, and both of said barrels as well as both of said idling tubes feeding into a common manifold chamber for all the engine cylinders.
  • a dual carburettor having a pair of idling tubes one of which remains permanently open so that fluid can flow therethrough at any time, and closure means coacting only with the other of said tubes for automatically closing the latter when engine operation is terminated and for automatically opening said other tube when 5
  • said closure means is an electro-magnetic valve which when unenergized automatically assumes said closed position, said electro-magnetic valve being energized in response to engine operation for automatically opening said other tube when the engine operates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US50626A 1969-07-16 1970-06-29 Switching-off device for internal combustion engine fed by a dual-body carburetor Expired - Lifetime US3678911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6924230A FR2053738A5 (enrdf_load_stackoverflow) 1969-07-16 1969-07-16

Publications (1)

Publication Number Publication Date
US3678911A true US3678911A (en) 1972-07-25

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ID=9037539

Family Applications (1)

Application Number Title Priority Date Filing Date
US50626A Expired - Lifetime US3678911A (en) 1969-07-16 1970-06-29 Switching-off device for internal combustion engine fed by a dual-body carburetor

Country Status (5)

Country Link
US (1) US3678911A (enrdf_load_stackoverflow)
DE (1) DE2034967A1 (enrdf_load_stackoverflow)
ES (1) ES381421A1 (enrdf_load_stackoverflow)
FR (1) FR2053738A5 (enrdf_load_stackoverflow)
GB (1) GB1294498A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805760A (en) * 1972-11-27 1974-04-23 Honda Motor Co Ltd Run-on prevention device for internal combustion engines
US4124662A (en) * 1974-05-02 1978-11-07 Nissan Motor Company, Limited Carburetor and method of operating same
US4125098A (en) * 1975-06-24 1978-11-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Multicylinder engine
US4261311A (en) * 1979-06-29 1981-04-14 Rupe Melvin E Engine intake bifurcation apparatus
USRE30844E (en) * 1972-11-27 1982-01-12 Honda Giken Kogyo Kabushiki Kaisha Run-on prevention device for internal combustion engines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390019A (en) * 1945-11-27 Carburetor
US2514673A (en) * 1947-04-26 1950-07-11 Harry E Rider Ignition circuit breaker
US2705944A (en) * 1951-09-01 1955-04-12 Continental Motors Corp Fuel and air shut off valve structure
US2817325A (en) * 1957-12-24 Control device for internal combustion engines
US2886020A (en) * 1955-10-14 1959-05-12 Fred C Wolfe Carburetor idler jet control means
US2946615A (en) * 1957-12-26 1960-07-26 Jr Charles F Yawman Device for removing and replacing fluorescent lamps
US3158144A (en) * 1964-11-24 Walker
US3398731A (en) * 1966-06-22 1968-08-27 Gylling & Co Ab Device for automatic control of the fuel supply to diesel engines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390019A (en) * 1945-11-27 Carburetor
US2817325A (en) * 1957-12-24 Control device for internal combustion engines
US3158144A (en) * 1964-11-24 Walker
US2514673A (en) * 1947-04-26 1950-07-11 Harry E Rider Ignition circuit breaker
US2705944A (en) * 1951-09-01 1955-04-12 Continental Motors Corp Fuel and air shut off valve structure
US2886020A (en) * 1955-10-14 1959-05-12 Fred C Wolfe Carburetor idler jet control means
US2946615A (en) * 1957-12-26 1960-07-26 Jr Charles F Yawman Device for removing and replacing fluorescent lamps
US3398731A (en) * 1966-06-22 1968-08-27 Gylling & Co Ab Device for automatic control of the fuel supply to diesel engines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805760A (en) * 1972-11-27 1974-04-23 Honda Motor Co Ltd Run-on prevention device for internal combustion engines
USRE30844E (en) * 1972-11-27 1982-01-12 Honda Giken Kogyo Kabushiki Kaisha Run-on prevention device for internal combustion engines
US4124662A (en) * 1974-05-02 1978-11-07 Nissan Motor Company, Limited Carburetor and method of operating same
US4125098A (en) * 1975-06-24 1978-11-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Multicylinder engine
US4261311A (en) * 1979-06-29 1981-04-14 Rupe Melvin E Engine intake bifurcation apparatus

Also Published As

Publication number Publication date
FR2053738A5 (enrdf_load_stackoverflow) 1971-04-16
DE2034967A1 (de) 1971-01-28
GB1294498A (en) 1972-10-25
ES381421A1 (es) 1972-11-16

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