EP0019512B1 - Carburateur avec moyens de correction de la richesse du mélange en fonction de l'amplitude des pulsations - Google Patents

Carburateur avec moyens de correction de la richesse du mélange en fonction de l'amplitude des pulsations Download PDF

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Publication number
EP0019512B1
EP0019512B1 EP80400580A EP80400580A EP0019512B1 EP 0019512 B1 EP0019512 B1 EP 0019512B1 EP 80400580 A EP80400580 A EP 80400580A EP 80400580 A EP80400580 A EP 80400580A EP 0019512 B1 EP0019512 B1 EP 0019512B1
Authority
EP
European Patent Office
Prior art keywords
carburetor
fuel
emulsion
air
well
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
EP80400580A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0019512A1 (fr
Inventor
Michael Pontoppidan
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.)
Societe Industrielle de Brevets et dEtudes SIBE
Original Assignee
Societe Industrielle de Brevets et dEtudes SIBE
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 Societe Industrielle de Brevets et dEtudes SIBE filed Critical Societe Industrielle de Brevets et dEtudes SIBE
Publication of EP0019512A1 publication Critical patent/EP0019512A1/fr
Application granted granted Critical
Publication of EP0019512B1 publication Critical patent/EP0019512B1/fr
Expired legal-status Critical Current

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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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/23—Fuel aerating devices
    • F02M7/24—Controlling flow of aerating air
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/06—Other details of fuel conduits

Definitions

  • the present invention relates to carburetors for internal combustion engines of the type which include a fuel spouting system opening into the intake duct and comprising an emulsion well supplied with air and fuel and a correcting device intended for correct the richness of the air / fuel mixture supplied to the engine as a function of the amplitude of the alternating pressure component which appears in the intake duct, the suction by the engine cylinders, which takes place in a pulsed manner .
  • FR-A-2 355 170 describes a carburetor in which the correcting device modulates the gas pressure prevailing above the fuel as a function of the alternating component of the pressure applied to it.
  • This device if it gives satisfactory results, is often costly to implement in practice; in particular, the embodiment given by way of example requires a system of valves making it possible to subject a membrane to a differential pressure which is a function of the alternating component of the pressure in the intake duct.
  • the present invention aims to provide a carburetor provided with a device which meets the requirements of practice better than those previously known, in particular in that the device is economical and provides a correction which can be easily adapted to the requirements of the different types of engines.
  • the correcting device comprises a single movable wall delimiting a chamber communicating directly with the emulsion well and to which the pulsations in the intake duct are applied via an element d attenuation, so that the correcting device acts on the pressure prevailing in the emulsion well in the direction of increasing or decreasing the alternating component of the pressure communicated to it from the outlet of the spouting system, depending on whether the acoustic adaptation of the carburetor-manifold assembly tends to produce an excessive or too low richness of the mixture at high engine loads.
  • the movable wall such as a membrane, separates a cavity into a chamber communicating with the emulsion wells and another chamber connected to the venturi of the carburetor by a conduit, which can be provided with a capillary passage of small section.
  • a conduit which can be provided with a capillary passage of small section.
  • said chamber constitutes a damping capacity separated from the fuel emulsion tube placed in the emulsion well by a calibrated orifice for ventilating the well, capacity communicating with the air inlet of the carburetor by a calibrated passage separated from the atmosphere by a deformable wall or by a rigid wall.
  • This capacity tends to dampen the pulses transmitted to the fuel jet system of the carburetor; all other things being equal, this arrangement avoids a depletion of the mixture supplied to the engine.
  • the inverted carburetor shown in FIG. 1 comprises an intake duct 1 provided with a throttling member 2, constituted by a throttle wedged on an axis 3 actuable by the driver.
  • the duct is provided with an air inlet 4 protected by an air filter (not shown) and with a main venturi 5 into which opens a main spouting system of air / fuel emulsion, supplied with fuel by a tank 6 at constant level.
  • the tank 6 contains a float 7 actuating a fuel inlet needle (not shown) so as to maintain the free surface of the fuel permanently at approximately level N.
  • the main spouting system shown comprises: an emulsion well 8 supplied with fuel by the tank 6, via a main nozzle 9; an emulsion tube 13, provided in its lower part with perforations 10, plunging into the well 8 to take fuel there and mix it with emulsion air coming from the air inlet 4 of the carburetor and arriving in a channel provided with a calibrated ventilation opening 12; and a channel 14 withdrawing the air-fuel mixture from the upper part of the well 8 and leading it to the interior of a secondary venturi 15 from where it opens into the intake duct in the vicinity of the neck of the main venturi 5.
  • the invention uses the fact that the pulsations exerted in the emulsion well have an action on the fuel flow of the kind illustrated in FIG. 2. It can be seen that the fuel flow Q varies in opposite direction to the ratio Ao / P between the amplitude of the alternating component Ao of the pressure and the mean value P of the latter.
  • an additional correction can be made by having an adjustable attenuation element on the conduit 24; this element advantageously consists of a capillary tube 25 disposed on the conduit 24 and the characteristics of which will be chosen with a view to suitable adaptation to the carburetor.
  • the correcting device is provided to counter the depletion due to the transmission of pulses from the outlet in the venturi 15 to the well 8.
  • a damping capacity 30 comprising two chambers 31 and 32 separated from each other by a flexible membrane 33; the chamber 31, in direct relation with the spraying system, communicates with the air inlet 4 of the carburetor by a calibrated passage 34; chamber 32 is connected to a zone at atmospheric pressure by a passage 35.
  • the flexible membrane can be replaced by a movable wall; in this case, the capacity 30 is reduced to the chamber 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Pipe Accessories (AREA)
EP80400580A 1979-05-11 1980-04-25 Carburateur avec moyens de correction de la richesse du mélange en fonction de l'amplitude des pulsations Expired EP0019512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7912124A FR2456219A1 (fr) 1979-05-11 1979-05-11 Perfectionnements aux carburateurs pour moteurs a combustion interne
FR7912124 1979-05-11

Publications (2)

Publication Number Publication Date
EP0019512A1 EP0019512A1 (fr) 1980-11-26
EP0019512B1 true EP0019512B1 (fr) 1982-02-24

Family

ID=9225392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400580A Expired EP0019512B1 (fr) 1979-05-11 1980-04-25 Carburateur avec moyens de correction de la richesse du mélange en fonction de l'amplitude des pulsations

Country Status (10)

Country Link
US (1) US4298548A (es)
EP (1) EP0019512B1 (es)
JP (1) JPS55151144A (es)
AR (1) AR221759A1 (es)
AU (1) AU531994B2 (es)
BR (1) BR8002910A (es)
DE (1) DE3060209D1 (es)
ES (1) ES8100701A1 (es)
FR (1) FR2456219A1 (es)
MX (1) MX149645A (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7472894B2 (en) * 2006-06-28 2009-01-06 Wisconsin Alumni Research Foundation Engine carburetion
US7264224B1 (en) 2006-12-19 2007-09-04 Victaulic Company Valve with offset venturi
DE102012224093A1 (de) * 2012-12-20 2014-06-26 Continental Automotive Gmbh Ventilvorrichtung für ein Kraftfahrzeug
ITBO20130554A1 (it) * 2013-10-09 2015-04-10 Telair S R L Carburatore, per l'alimentazione di motori a scoppio.
CN111036006B (zh) * 2019-12-24 2021-08-03 上海海事大学 一种声波增强的船舶废气脱硫及颗粒物去除装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA579434A (en) * 1959-07-14 C. Phillips Bernard Charge forming device
US1865851A (en) * 1929-08-09 1932-07-05 Edward F Geiger Liquid flow-controlling device
US2212258A (en) * 1936-01-15 1940-08-20 Beck Ludwig Carburetor
FR1081900A (fr) * 1953-05-11 1954-12-23 Solex Perfectionnements apportés aux dispositifs de carburation pour moteurs à combustion interne
US3738336A (en) * 1971-04-19 1973-06-12 N Holland Method and arrangement for controlling fuel delivery in a charge forming apparatus
JPS5032907B2 (es) * 1972-02-01 1975-10-25
FR2187144A5 (es) * 1972-05-29 1974-01-11 Peugeot & Renault
US4020859A (en) * 1972-05-29 1977-05-03 Regie Nationale Des Usines Renault System for controlling pressure by acoustic means
FR2299521A1 (fr) * 1975-02-03 1976-08-27 Peugeot & Renault Dispositif de correction de richesse pour carburateurs
JPS5293831A (en) * 1976-02-04 1977-08-06 Honda Motor Co Ltd Mixture gas corrector for quick acceleration of internal combustion en gine with sub-combustion chamber
FR2355170A1 (fr) * 1976-06-17 1978-01-13 Sibe Perfectionnements aux carburateurs pour moteurs a combustion interne

Also Published As

Publication number Publication date
FR2456219B1 (es) 1984-04-27
MX149645A (es) 1983-12-07
BR8002910A (pt) 1980-12-23
AR221759A1 (es) 1981-03-13
ES490533A0 (es) 1980-12-01
ES8100701A1 (es) 1980-12-01
US4298548A (en) 1981-11-03
AU5828680A (en) 1980-11-13
JPS55151144A (en) 1980-11-25
AU531994B2 (en) 1983-09-15
EP0019512A1 (fr) 1980-11-26
FR2456219A1 (fr) 1980-12-05
DE3060209D1 (en) 1982-03-25

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