EP0361600A2 - Zerstäubungsdüse für Vergaser einer gemischverdichtenden Brennkraftmaschine - Google Patents

Zerstäubungsdüse für Vergaser einer gemischverdichtenden Brennkraftmaschine Download PDF

Info

Publication number
EP0361600A2
EP0361600A2 EP89202378A EP89202378A EP0361600A2 EP 0361600 A2 EP0361600 A2 EP 0361600A2 EP 89202378 A EP89202378 A EP 89202378A EP 89202378 A EP89202378 A EP 89202378A EP 0361600 A2 EP0361600 A2 EP 0361600A2
Authority
EP
European Patent Office
Prior art keywords
vertical tube
nozzle
level
sprayer
tube
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.)
Granted
Application number
EP89202378A
Other languages
English (en)
French (fr)
Other versions
EP0361600A3 (en
EP0361600B1 (de
Inventor
Marco Dr. Ing. Morini
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0361600A2 publication Critical patent/EP0361600A2/de
Publication of EP0361600A3 publication Critical patent/EP0361600A3/fr
Application granted granted Critical
Publication of EP0361600B1 publication Critical patent/EP0361600B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
    • F02M7/103—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means with self-acting equaliser jets
    • 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
    • F02M19/03—Fuel atomising nozzles; Arrangement of emulsifying air conduits
    • 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

Definitions

  • the present invention relates to a sprayer for the carburetor of an internal combustion engine with carburetion, comprising means for the automatic correction of the composition (dosage) of the mixture delivered in correspondence of the different operating conditions of the engine.
  • an elementary carburetor comprising a Venturi tube diffuser through which the air sucked in by the engine passes, a gasoline sprayer arranged in the restricted section of the diffuser, a constant level tank supplying gasoline to the sprayer, and a calibrated nozzle (fuel nozzle) arranged between the tank and the sprayer, delivers to the engine a mixture of air and gasoline whose composition is not constant but is enriched when the flow of l the air drawn in by the engine increases.
  • Various devices have been proposed to automatically correct this change in the composition of the mixture delivered.
  • a so-called air brake device which comprises, between the fuel nozzle and the sprayer, a small well in which is immersed a blind tube having perforated walls, which at its upper end communicates with the atmosphere through a second calibrated nozzle (air jet).
  • the sprayer sucks, with the gasoline which passes through the gasoline nozzle, air which is sucked in by the air jet and leaves through the perforations of the tube.
  • This air opposes the passage of gasoline through the small well, a resistance which increases with increasing flow, so that, at least within certain limits, the desired correction is obtained during operation under stationary conditions.
  • this device has drawbacks.
  • the device mentioned also has a favorable action under transient operating conditions, namely during accelerations, because the tube immersed in the small well has a reserve of gasoline which can be sucked up quite easily, not being braked by the fuel nozzle but only through the perforations in the tube.
  • this effect is not sufficient in practice, so that in most cases it is also necessary to provide an acceleration or recovery pump.
  • the main object of the present invention is to provide a sprayer in which the automatic correction of the composition of the delivered mixture must be carried out in a particularly rational and effective manner, while allowing a very simple structure, any part of which must be easy. to access, both for adjustment and for cleaning.
  • a sprayer comprising a flow nozzle joined to a first vertical tube immersed in a tank with constant level of gasoline and provided with a gasoline nozzle, and a second vertical tube immersed in the tank with a constant level of petrol, surrounding the first vertical tube and determining a gap in relation to the latter, this second vertical tube being closed at its lower end by a bottom crossed by a calibrated hole, and being provided with openings which pass through it at a level higher than the constant level of filling of the tank.
  • the level of petrol which is established, in operation under stationary conditions, in the gap between the two vertical tubes, is reduced when the petrol flow increases and, like the load applied at the fuel nozzle depends on this level, an antagonistic effect is obtained with the tendency to enrich the mixture supplied to the engine, when the latter's speed increases.
  • Another object of the invention is to improve a sprayer as defined above, so as to promote as much as possible the mixture between air and petrol and the vaporization of the latter.
  • said first vertical tube comprises an atmospheric air intake provided with a secondary air jet, and it has inside a dividing wall defining a section which communicates with said secondary air jet and which extends downward into said first vertical tube.
  • said first vertical tube also comprises at its upper end another atmospheric air intake provided with a primary air jet.
  • This nozzle presents itself as another element that can be adjusted for adjusting the dosage.
  • Yet another object of the invention is to improve a sprayer as defined above, so as to give it in operation in transient conditions indeed so favorable to make unnecessary the installation of an acceleration pump.
  • the section delimited in the first vertical tube and communicating with the secondary air jet forms a reserve of fuel which can be sucked in without appreciable resistance when the shutter of the diffuser is open to change from operation to speed minimum for normal operation, so that it temporarily enriches the mixture supplied to the engine during the acceleration phase, by replacing the function normally entrusted to a recovery pump.
  • the letter V denotes a tank, closed above by a cover C, in which, by arrangements well known per se and which are neither described nor shown here, a constant level L of gasoline is maintained .
  • the letter D designates a diffuser intended to be connected to the suction manifold of a carburetion engine to be traversed by the aspirated air, flowing in the direction shown by the arrow F.
  • the diffuser D is shaped like a tube of Venturi and it has a restricted section R. In this restricted section R is arranged the flow nozzle 1 of the sprayer.
  • this nozzle is curved by 90 ° and it is connected to a coupling sleeve 2 which passes through a corresponding hole in the wall of the diffuser D to connect to the other parts of the sprayer.
  • this arrangement which is advantageous from the point of view of construction, is not necessary, and the flow nozzle 1 could also be manufactured in one piece with other parts of the sprayer.
  • the sprayer has a first vertical tube 4 which passes through the cover C of the tank V and plunges into the latter.
  • the tube 4 has a lateral connection 5 to which is joined the coupling sleeve 2 of the flow spout 1.
  • the tube 4 carries a calibrated nozzle 13 constituting the fuel nozzle of the sprayer.
  • the vertical tube 4 also extends upwards by a section 6 which opens into the atmosphere and carries at its upper end a calibrated nozzle 14 constituting a primary air nozzle.
  • the tube 4 has a connector 7, opposite to the connector 5, which opens to the atmosphere and carries a calibrated nozzle 15 constituting a secondary air jet.
  • the vertical tube 4 is subdivided inside by a dividing wall 8 which extends over part of its height, dividing the tube 4 into a section 9 communicating with the flow nozzle 1 and with the primary air jet 14, and a section 10 communicating with the secondary air jet 15.
  • the vertical tube 4 finally carries, outside, a pair of flanges 11 and 12. It has been specified that the parts 6, 7 and 8 relate to the particular form shown, because they are not necessary to achieve the main object of the invention, so it can also be assumed that they are lacking, in whole or in part, in simplified embodiments. In these simplified forms the tube 4 should be blind in correspondence with the missing sprinkler (s).
  • the sprayer finally comprises a second vertical tube 16, the upper end of which is joined to the flanges 11 and 12 and communicates with the atmosphere of the tank V, above the filling level L, through openings 17.
  • the end bottom of the tube 16 is closed by a bottom 18 in which a calibrated hole has been formed 19.
  • the internal diameter of the tube 16 is somewhat larger than the external diameter of the fuel nozzle 13 mounted on the lower end of the vertical tube 4. Between the vertical tubes 4 and 16 there is a gap 20.
  • the gas jet 13 of the sprayer (which determines the flow of gasoline sucked , as a function of the depression existing in the restricted section R of the diffuser r D and as a function of the hydraulic load to which it is subjected) is no more subject, as in known carburetors, to a constant load corresponding to the level L of filling of the tank V, but to a variable load corresponding to the level M of the gasoline in the gap 20, which level is reduced to the increase in the air flow sucked by the engine.
  • This effect is antagonistic to the tendency of the flowed mixture to get richer when the flow of the sucked air increases, and therefore, as we includes, an appropriate proportioning of the different parts of the sprayer, and in particular of the fuel nozzle 13 and of the calibrated hole 19, makes it possible to achieve the course considered most suitable for the composition of the mixture delivered, according to the engine speed.
  • the content of the gap 20 also introduces a favorable effect in the operation at a transient regime, be it acceleration or deceleration.
  • the level M in the gap 20 must be reduced from the higher level corresponding to the initial speed of the engine to the reduced level corresponding to the higher final speed, and all the quantity of petrol which corresponds to this level variation is debited to the motor in addition during the acceleration phase.
  • the level M in the gap 20 must rise from the level corresponding to the initial speed of the engine to the higher level corresponding to the reduced final speed, and all the quantity of petrol which corresponds this level variation is subtracted from the motor supply during the deceleration phase.
  • This behavior is favorable, be it in terms of performance or in terms of economy, and its intensity can be adjusted by appropriately choosing the capacity of the gap 20.
  • the secondary air jet 15 communicating with the section 10 of the tube 4 divided by the wall 8, it is noted that, by the effect of the depression which is established in the tube 4, a certain amount of air is sucked by the nozzle 15, descends in section 10 of the tube 4 and goes back in section 9 with the gasoline, bubbling in the latter and promoting its vaporization. In this way the spout 1 flows into the diffuser D of the gasoline already partly mixed with air and vaporized, to the advantage of the homogeneity of the mixture which finally forms.
  • the presence of the secondary air jet 15 introduces an additional element which can be adjusted to obtain the metering conditions considered most suitable. This effect can also be achieved with an extension relatively reduced towards the bottom of the dividing wall 8. When there is the primary air jet 14, air is sucked through it too, and this air mixes in the flow nozzle 1 with the mixture already formed by gasoline and air; this introduces yet another element for adjusting the dosage.
  • the importance of this effect can be proportional to the actual needs by appropriately dimensioning the capacity of the section 10 of the tube 4.
  • the delivery to the engine of said additional quantity of petrol is more effective than the injection of '' an equal amount of gasoline carried out by a usual return pump, because the latter injects the fuel under a very reduced pressure, and therefore without it being able to spray and vaporize in an effective way, so that it does not can't be used in the best way.
  • the additional quantity of gasoline delivered by the sprayer according to the invention is sucked through the flow nozzle 1 located in the restricted section of the diffuser D, and therefore in the best mixing conditions.
  • the sprayer according to the invention is compact and of simple construction, and it is easy to access all of its parts for adjustment and for cleaning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Catching Or Destruction (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
EP89202378A 1988-09-30 1989-09-21 Zerstäubungsdüse für Vergaser einer gemischverdichtenden Brennkraftmaschine Expired - Lifetime EP0361600B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67876/88A IT1224458B (it) 1988-09-30 1988-09-30 Spuzzatore corretto per il carburatore di un motore a carburazione
IT6787688 1988-09-30

Publications (3)

Publication Number Publication Date
EP0361600A2 true EP0361600A2 (de) 1990-04-04
EP0361600A3 EP0361600A3 (en) 1990-06-20
EP0361600B1 EP0361600B1 (de) 1992-07-08

Family

ID=11306007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89202378A Expired - Lifetime EP0361600B1 (de) 1988-09-30 1989-09-21 Zerstäubungsdüse für Vergaser einer gemischverdichtenden Brennkraftmaschine

Country Status (6)

Country Link
US (1) US4978479A (de)
EP (1) EP0361600B1 (de)
JP (1) JPH02264144A (de)
DE (1) DE68902031T2 (de)
ES (1) ES2033082T3 (de)
IT (1) IT1224458B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8697305B2 (en) * 2009-03-16 2014-04-15 Kabushiki Kaisha Toyoda Jidoshokki Fuel cell system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR485405A (fr) * 1917-05-09 1918-01-09 Marius Jean Baptiste Barbarou Perfectionnements aux carburateurs pour moteurs à explosions
US1562651A (en) * 1918-01-02 1925-11-24 Stromberg Motor Devices Co Carburetor
US1613257A (en) * 1919-10-18 1927-01-04 Packard Motor Car Co Carbureting device
BE356232A (de) * 1928-11-29
US2043514A (en) * 1932-11-25 1936-06-09 Solex Carburetor
US2346711A (en) * 1941-12-15 1944-04-18 Ladimir F Stupecky Carburetor
US3387831A (en) * 1965-10-23 1968-06-11 Acf Ind Inc Carburetor anti-surge device
US3940460A (en) * 1974-02-14 1976-02-24 Graybill Clinton L Air-valve type carburetor
US4001356A (en) * 1975-08-22 1977-01-04 Clinton Graybill Variable venturi downdraft carburetor
JPS5372935A (en) * 1976-12-10 1978-06-28 Hitachi Ltd Carburetor
JPS6027822B2 (ja) * 1977-05-13 1985-07-01 自動車機器技術研究組合 気化器の始動装置
IT1144263B (it) * 1981-07-02 1986-10-29 Marco Morini Carburatore per motori a combustione interna
US4515734A (en) * 1983-01-28 1985-05-07 Rock Howard P Fuel efficient, low pollution carburetor and methods

Also Published As

Publication number Publication date
DE68902031D1 (de) 1992-08-13
JPH02264144A (ja) 1990-10-26
EP0361600A3 (en) 1990-06-20
EP0361600B1 (de) 1992-07-08
DE68902031T2 (de) 1993-02-11
IT1224458B (it) 1990-10-04
IT8867876A0 (it) 1988-09-30
US4978479A (en) 1990-12-18
ES2033082T3 (es) 1993-03-01

Similar Documents

Publication Publication Date Title
EP0361600B1 (de) Zerstäubungsdüse für Vergaser einer gemischverdichtenden Brennkraftmaschine
FR2529621A1 (fr) Ensemble de carburation a colonne liquide et procede d'alimentation en carburant d'un moteur a combustion interne
FR2580190A1 (fr) Filtre a carburant et circuit d'alimentation en carburant equipe de ce filtre
EP0361599B1 (de) Satz zur Versorgung einer gemischverdichtenden Brennkraftmaschine während besonderer Betriebsphasen
EP0218515B1 (de) Vergaser für Brennkraftmaschine
EP0060184A1 (de) Aufladung von Zweitakt-Brennkraftmaschinen
FR2698662A1 (fr) Dispositif assurant la combustion complète du mélange d'air et de carburant liquide alimentant les moteurs à combustion interne.
BE409078A (de)
BE534613A (de)
CH137555A (fr) Carburateur pour moteurs à combustion interne.
BE363573A (de)
BE340823A (de)
BE787603A (fr) Procede et appareil pour former un melange de carburant et d'air au moyen d'energie sonique.
BE358441A (de)
FR2461823A1 (fr) Dispositif de correction de carburation pour moteur a explosion
BE415587A (de)
JPH04191456A (ja) ダイヤフラム式気化器を備えたエンジンの始動装置
BE399299A (de)
BE410650A (de)
BE417674A (de)
BE378891A (de)
FR2696785A1 (fr) Carburateur à membrane avec adaptation altimétrique.
CH88434A (fr) Carburateur pour moteurs à combustion interne.
BE393069A (de)
BE366497A (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB

17P Request for examination filed

Effective date: 19901210

17Q First examination report despatched

Effective date: 19910417

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

REF Corresponds to:

Ref document number: 68902031

Country of ref document: DE

Date of ref document: 19920813

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2033082

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930915

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19930922

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930929

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931022

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940921

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19940922

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940921

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001102