EP0052026B1 - Dispositif de starter automatique pour carburateur double corps - Google Patents

Dispositif de starter automatique pour carburateur double corps Download PDF

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Publication number
EP0052026B1
EP0052026B1 EP81401579A EP81401579A EP0052026B1 EP 0052026 B1 EP0052026 B1 EP 0052026B1 EP 81401579 A EP81401579 A EP 81401579A EP 81401579 A EP81401579 A EP 81401579A EP 0052026 B1 EP0052026 B1 EP 0052026B1
Authority
EP
European Patent Office
Prior art keywords
arrangement
lever
flaps
controlling
engine
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
Application number
EP81401579A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0052026A1 (fr
Inventor
Jean-Pierre Kervinio
André Nartowski
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.)
Renault SA
Original Assignee
Regie Nationale des Usines Renault
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 Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Publication of EP0052026A1 publication Critical patent/EP0052026A1/fr
Application granted granted Critical
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Classifications

    • 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
    • F02M1/10—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 engine temperature, e.g. having thermostat
    • 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

Definitions

  • the present invention is in the field of carburetors for internal combustion engines, and more specifically relates to an automatic choke device intended to be incorporated into a double-barrel carburetor.
  • Bimetal type automatic starters currently mounted on the carburetors are intended to perform two functions at the same time, namely to supply the engine at the start to ensure a given speed when empty and on the other hand to allow starting. when the vehicle is cold, until a given engine temperature is obtained, for example of the order of 80 ° C.
  • These two functions being ensured by a single mechanism, it is very difficult to obtain a good adaptation of the richness of the mixture for running in transient regime, this richness being too important in stabilized regime and in idle mode, which translates by a diet that is too important when stopped.
  • the automatic choke device for carburetor according to the present invention is of the aforementioned type and is characterized in that this arrangement for controlling the flaps of the carburetor bodies cooperates with this arrangement for controlling the throttle valve of the second carburetor body by the same pressure applied to the two pneumatic members of these respective arrangements of control from the intake manifold.
  • the carburetor on which is mounted the automatic choke device according to the present invention consists of two bodies A and B, the mechanical control of the butterflies, which is not the subject of the invention, not being shown in the drawing.
  • the automatic choke device according to the invention consists of two arrangements, one of which is mounted on the first carburetor body A and the other on the second body B.
  • the arrangement mounted on the body A is more precisely designed to adjust the opening of the flaps 3, 4.
  • This arrangement consists of a rotary lever 1, the position of which is controlled by a heat-sensitive element, of the bimetallic strip type 2, the movement of which is set according to the engine temperature.
  • the lever 1 is connected to the axis 23 of the flaps 3 and 4 by a tie rod 5, itself articulated to a control rod 5a secured to said axis 23.
  • the lever 1 is directly connected to the lower end, provided with a notch 7, a rod 6 which, by its opposite end, is secured to the membrane 8 of a pressure capsule 9, comprising in its upper compartment a spring 10 intended to exert a given force on the membrane 8
  • Adjustment means in the form of a stop 11 are mounted in the pressure capsule 9, the upper compartment of which communicates with the intake manifold by a flexible conduit, pressure delay means, for example in the form of 'A regulator housing 12, being disposed between the pressure capsule 9 and the intake manifold.
  • the second arrangement installed on the second body B of the carburettor aims to provide a volume of air necessary for starting the engine and for making it run empty by acting on the throttle valve.
  • This arrangement comprises a cam 13 whose angular position is controlled by a thermosensitive element 14 whose movement is regulated as a function of the temperature of the engine.
  • This cam 13 is intended to limit the complete closure of the throttle valve 25 of the second body B of the carburetor by means of a push rod 16, articulated by one of its ends to a lever 15 secured to the throttle shaft 25.
  • a lever 17 at the end of which is provided an adjustable stop 18 intended to come into contact with the cam 13.
  • the other end of the push rod 16 is connected to the membrane 19 d '' a pressure capsule 20 whose compartment on the side of the rod 16 is subjected to atmospheric pressure while the other compartment, in which is mounted a spring 21 intended to apply a force on the membrane 19 and to control the opening of the butterfly 25, communicates by a nozzle 22 and a flexible conduit with the intake manifold.
  • a nozzle 22 In the part of the housing subjected to atmospheric pressure is disposed an adjustment stop 28.
  • the diffusers 26 and 24 are shown in the carburetor bodies A and B respectively.
  • the automatic choke device operates in the following manner: Before actuating the engine with the starter, the position of the constituent elements of the choke is shown in FIGS. 1 and 2.
  • the spring 21 by means of the rod 16 pushes the lever 15 and causes a certain opening of the butterfly 25 of the second body B.
  • the value of this opening is given by the adjustable stop 28. This value is established during setting point of the choke device.
  • the bimetallic strip 2 On the first body, the bimetallic strip 2, by means of the lever 1 and the tie rod 5, turns the axis of the flap 23 and closes the flaps of the first and second bodies 3 and 4.
  • the membrane 8 compresses the spring 10 and the rod 6 rotates the lever 1 which, consequently, opens the flaps 3 and 4. This position of the system is shown in FIGS. 3 and 4.
  • the engine is supplied with fuel in this position by the idle circuits of the first and second bodies. These circuits are not shown in the drawings. If the quantity of fuel is not sufficient, it can be increased by changing the idle jet of the second body, without causing the increase in consumption in hot running.
  • FIGS 5 and 6 are shown the components of the automatic choke at the time of acceleration.
  • the butterfly 27 of the first body A or also of the second body B is opened if the acceleration is strong.
  • the engine vacuum drops quickly.
  • the vacuum in the upper part of the housing 9 decreases as quickly because the delay housing 12 does not work in this direction.
  • the res fate 10 pushes back the rod 6, the bimetallic strip 2 turns the lever 1 and the drawing 5 closes the flaps 3 and 4.
  • the vacuum under the flap of the first body increases rapidly, which causes a strong fuel flow, through the diffuser 26. Once the vehicle speed has stabilized, the engine vacuum increases and the flaps 3 and 4 are in the open position presented on board 23.
  • the second body B with its own constituent elements is not shown in FIGS. 5 and 6, because in this operating phase the second body does not play any role.
  • the bimetallic strip 2 maintains the flaps 3 and 4 in the open position and the bimetallic strip 14 turns the cam 13. Consequently, the rod 16 takes a position such that the butterfly valve 25 of the second body B is completely closed. To obtain this position, it is necessary to act on the setting of the spring 21 and of the return spring of the second body.
  • the system on the second body opens the butterfly 25 of the second body B.
  • the depression of the engine withdraws the rod 16 via the membrane 19 and the butterfly 25 of the second body B is closed. Idling is ensured by the fixed position of the butterfly 27 of the first body A.

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)
EP81401579A 1980-11-07 1981-10-13 Dispositif de starter automatique pour carburateur double corps Expired EP0052026B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8023851A FR2493921A1 (fr) 1980-11-07 1980-11-07 Dispositif de starter automatique pour carburateur double corps
FR8023851 1980-11-07

Publications (2)

Publication Number Publication Date
EP0052026A1 EP0052026A1 (fr) 1982-05-19
EP0052026B1 true EP0052026B1 (fr) 1986-01-29

Family

ID=9247799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401579A Expired EP0052026B1 (fr) 1980-11-07 1981-10-13 Dispositif de starter automatique pour carburateur double corps

Country Status (8)

Country Link
US (1) US4385009A (oth)
EP (1) EP0052026B1 (oth)
JP (1) JPS57108445A (oth)
DE (1) DE3173645D1 (oth)
ES (1) ES8300177A1 (oth)
FR (1) FR2493921A1 (oth)
MX (1) MX154725A (oth)
PT (1) PT73938B (oth)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2537212A1 (fr) * 1982-12-07 1984-06-08 Renault Dispositif de starter automatique pour carburateurs

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633546A1 (de) * 1976-05-31 1977-12-15 Sibe Vergaser mit hilfsstartvorrichtung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609806A (en) * 1950-03-07 1952-09-09 Bendix Aviat Corp Carburetor
GB842079A (en) 1958-05-23 1960-07-20 Gen Motors Corp Improved apparatus for forming the combustible charge for internal combustion engines
FR1291578A (fr) 1961-02-20 1962-04-27 Sibe Perfectionnements apportés aux carburateurs munis d'un dispositif auxiliaire de départ à commande automatique
US3294374A (en) * 1964-09-29 1966-12-27 Acf Ind Inc Carburetor
US3785624A (en) * 1970-10-12 1974-01-15 Ethyl Corp Carburetor
FR2248418B2 (oth) * 1973-10-19 1980-11-07 Sibe
US3831567A (en) * 1973-08-16 1974-08-27 Ford Motor Co Supplemental pulldown mechanism for carburetor automatic choke
US3965223A (en) * 1974-09-18 1976-06-22 Schmelzer Corporation Charge forming device
DE2446403A1 (de) * 1974-09-28 1976-04-08 Daimler Benz Ag Einrichtung zur drehzahlstabilisierung im leerlauf nach dem starten bei einem vergaser fuer ottomotoren
JPS5154133A (en) * 1974-11-06 1976-05-13 Honda Motor Co Ltd Kikakino chookubenseigyosochi
US3947531A (en) * 1974-12-23 1976-03-30 Ford Motor Company Carburetor with controlled fast idle cam
JPS5823499B2 (ja) 1975-11-14 1983-05-16 トヨタ自動車株式会社 ナイネンキカン
US4053542A (en) * 1976-07-22 1977-10-11 Acf Industries, Inc. Control means for secondary throttle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633546A1 (de) * 1976-05-31 1977-12-15 Sibe Vergaser mit hilfsstartvorrichtung

Also Published As

Publication number Publication date
MX154725A (es) 1987-12-07
FR2493921B1 (oth) 1984-04-20
PT73938B (fr) 1983-04-29
EP0052026A1 (fr) 1982-05-19
FR2493921A1 (fr) 1982-05-14
US4385009A (en) 1983-05-24
ES506922A0 (es) 1982-10-01
DE3173645D1 (en) 1986-03-13
PT73938A (fr) 1981-12-01
ES8300177A1 (es) 1982-10-01
JPS57108445A (en) 1982-07-06

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