EP1353058B1 - Carburateur pour moteurs a essence avec buse de combustible réglable - Google Patents

Carburateur pour moteurs a essence avec buse de combustible réglable Download PDF

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Publication number
EP1353058B1
EP1353058B1 EP03006885A EP03006885A EP1353058B1 EP 1353058 B1 EP1353058 B1 EP 1353058B1 EP 03006885 A EP03006885 A EP 03006885A EP 03006885 A EP03006885 A EP 03006885A EP 1353058 B1 EP1353058 B1 EP 1353058B1
Authority
EP
European Patent Office
Prior art keywords
fuel
gasoline engines
carburettor
piezo
section
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
EP03006885A
Other languages
German (de)
English (en)
Other versions
EP1353058A2 (fr
EP1353058A3 (fr
Inventor
Norbert Dr.-Ing. Adolph
Martin Dr.-Ing. Düsterhöft
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.)
Vemac & Cokg GmbH
Original Assignee
Vemac & Cokg GmbH
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Filing date
Publication date
Application filed by Vemac & Cokg GmbH filed Critical Vemac & Cokg GmbH
Publication of EP1353058A2 publication Critical patent/EP1353058A2/fr
Publication of EP1353058A3 publication Critical patent/EP1353058A3/fr
Application granted granted Critical
Publication of EP1353058B1 publication Critical patent/EP1353058B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/14—Carburettors with fuel-supply parts opened and closed in synchronism with engine stroke ; Valve carburettors
    • F02M17/147—Valve carburettor with simultaneous air and fuel control

Definitions

  • the invention relates to a gasifier for a gasoline engine with a venturi for sucking fuel from a fuel line opening into the venturi.
  • the fuel line is connected to a fuel chamber and has between Fuel chamber and its mouth in the venturi a fuel nozzle for adjustment one sucked due to negative pressure in the air funnel from the fuel chamber Fuel quantity on.
  • the flow cross section of the fuel nozzle is by means of a changeable piezoelectric actuator.
  • Carburettors in which the fuel-air mixture required for the operation of petrol engines is generated by drawing in fuel and mixing with air are to Adjustment of an operationally required variable fuel air mixture only imperfectly suitable.
  • carburetors are classified as not optimizable
  • DE 1905634 A1 describes piezoelements, with which the nozzle cross-section can be changed. It becomes the gap width of a formed between piezoelectric elements gap by the application of different Voltages to the piezo elements changed.
  • the object of the invention is to flexibly adapt to required engine power To provide carburetor, which meets requirements for low harmful exhaust emissions and moreover, with a simple structure without significant energy loss can be operated for the entire system.
  • a piezoelectric membrane is used as a bending transducer, claim 2.
  • Such actuators can be directly used as calibratable Drossei sculpture for Use fuel nozzles.
  • the piezoelectric actuator with an actuator for adjusting the Flow cross-section, claim 3. It is to protect the bending transducer appropriate to place it in a fuel-free room and clear the room from, to seal the fuel carrying area with a fuel impermeable membrane, Claims 4 and 5.
  • Figure 1 shows schematically a carburetor with venturi 1 and arranged in the vent Swiveling throttle 2, via which the intake pressure for the fuel line 3 fuel introduced into the venturi is controlled.
  • Fuel atomized In the fuel line is between the mouth 4 and a Fuel chamber 5, which in the embodiment via a needle valve 6 from a in FIG 1 fuel tank, not shown, is filled with fuel, a fuel nozzle. 7 used. With the fuel nozzle, the fuel mass flow is influenced in the carburetor. The flow cross-section of the fuel nozzle 7 can be calibrated.
  • piezoelectric actuator 8 the electrically with a voltage generator 9 is connected, the spatial movement and deflection of the Actuator influenced by voltage change.
  • a voltage generator can be also use a current or charge generator with the advantage that the changes of charge and strain of the piezoelectric actuator linear to each other behave.
  • the actuator is in operative connection with a flow cross section of the Fuel nozzle 7 changing actuator 10th
  • the voltage generator 9 is of a predetermined exhaust lambda value controlled.
  • the exhaust gas composition measures a correspondingly suitable one Lambda sensor 11, which converts its measured value into an electrical signal and a electronic controller turns on, in the exemplary embodiment a PID controller 12. Zur Regulation of the fuel mass flow is based on the load requirement for the Motor, which is specified as a reference variable for adjusting the fuel nozzle.
  • the at this mixture produced exhaust gas mixture is analyzed by the sensor 11 and leads over the PID controller 12 to an adjustment correction for the carburetor to be supplied Amount of fuel.
  • the fuel mass flow is thus dependent on a regulated to be maintained exhaust gas composition.
  • FIG. 2 schematically shows an exemplary embodiment of a piezoelectric Bending transducer 13 shown for adjusting an actuator of a fuel nozzle.
  • the Bending transducer is clamped on one side in a fixed bearing 14 and formed bimorph: on Voltage sensors 15 are two mutually adhering piezoelectric elements 16a, 16b connected, with the appropriate electrical activation of their ceramic layers at its free end to the fixed bearing 14 analogous to a leaf spring in the direction of the 17th bend.
  • the bending transducer controls an actuator which in a throttle 18 to Change the flow cross section 19 a movable in the throttle conical Nozzle needle 20 has.
  • the nozzle needle is at the free end of the piezoelectric element 16a appropriate.
  • a relation to the Piezo element 16 b applied negative electric potential then bends the Bending transducer 13 such that the nozzle needle 20 is pressed into the throttle 18 and in reduces the flow cross-section 19.
  • the piezoelectric element 16a on the other hand, a positive electric potential opposite to the piezo element 16b becomes the nozzle needle 20 lifted out of the throttle 18 and so increases the Flow cross-section 19.
  • the bending transducer is very sensitive to the voltage transmitter set, so that with appropriate training of the nozzle needle the Fuel mass flow is precisely adapted to the required conditions.
  • a bimorph bending transducer 21 on both sides in bearings 22, 23 support A nozzle needle 24 is on one of the two mutually attached piezo elements 25a, 25b of Bending transducer 21 mounted centrally, in the embodiment of the piezoelectric element 25a, and can be achieved by applying variable voltages to the piezo elements via a Voltage sensor 26 and thereby effected bulge of the bending transducer 21 in one Throttle 27 to adjust the flow cross-section 28 move.
  • a piezoelectric diaphragm 33 is used as a bending transducer, which at its circular membrane edge is clamped in a ring bearing 34 and the bulge in the same way as in the embodiment of Figure 3 by a voltage generator 35 is controlled.
  • a cone-shaped nozzle needle 36 is attached, which moves in bulge of the membrane 33 in a throttle 37 and whose Flow cross-section 38 changed.
  • the nozzle needle 36 is in the throttle 37 in a Sliding bearing 39 is guided radially.
  • the clamped in the ring bearing piezoelectric membrane and The radially guided nozzle needle stabilize the mechanical structure for a Fuel nozzle according to the invention with piezoelectric actuator and calibratable Actuator.
  • FIG. 5 shows an exemplary embodiment with a monomorphic actuator: a piezoelectric element 40 is rigidly attached to a spring plate 41 (bending spring or plate spring), in Embodiment is the piezoelectric element to its relief on the spring plate glued. In its edge region, the spring plate 41 rests in the housing 42 in bearings 43rd When a corresponding voltage is applied, the piezo element 40 bulges and with him the spring plate 41 so that a nozzle needle 44 is moved.
  • the nozzle needle is in Embodiment of a mechanical diaphragm 45 out in the housing 42 at its circular membrane edge is clamped in a fixed bearing 46.
  • the nozzle needle is attached to the membrane so that it due to the fuel pressure in Fuel chamber 47 of the fuel nozzle non-positively on the surface of the bearing plate 41st abuts and at a bulge of the bearing plate due to activation of the Piezoelectric element both for closing a throttle opening 48, as well as to the opening to move.
  • the nozzle needle leading mechanical serves Membrane 45 at the same time for sealing the fuel leading area of the Fuel nozzle with fuel inlet 49 and fuel outlet 50 from the housing area, in which the piezoelectric actuator is used.
  • the piezoelectric bending transducer so does not come in contact with fuel.
  • FIG. 6 Another variant of the invention is shown in FIG 6.
  • a piezoelectric bending transducer 96 used within a fuel line 97 with rectangular conduit cross section 98 is arranged to form a fuel nozzle.
  • the bending transducer can be deformed so that the Flow cross section of the fuel line 97 changed and the desired Fuel quantity is achieved.
  • FIG. 7 A also requiring little effort fuel nozzle with piezoelectric Bending transducer for controlling the throttle point is shown in Figure 7.
  • a bending transducer 106 in a gap 107 between Fuel inlet 108 and fuel outlet 109 so braced on both sides in bearings 110, that of the bending transducer in the rest position of the access section 111 to Fuel outlet 109 is closed. If the bending transducer 106 from the voltage generator 112 is activated, it opens the access cross section for the passage of the required Amount of fuel.
  • the bending transducer can also be used in such a way that the Access cross section is open in the rest position of the bending transducer. To influence the Fuel mass flow is the bending transducer then in its activation in Closing direction - to the inlet cross section of the fuel flow to - moves.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Claims (8)

  1. Carburateur pour moteur diesel, comportant un régulateur d'air (1) pour l'aspiration de carburant dans une conduite de carburant (3) débouchant dans le régulateur d'air, qui est raccordée à une cellule à carburant (5) et qui présente, entre la cellule à carburant et l'embouchure (4) du régulateur d'air, un injecteur de carburant (7) pour le réglage d'une quantité de carburant pouvant être aspirée dans la cellule de carburant grâce à la dépression régnant dans le régulateur d'air, l'injecteur de carburant présentant une section d'écoulement modifiable au moyen d'un actionneur piézoélectrique (8), caractérisé en ce que l'actionneur piézoélectrique est réalisé sous forme d'un transformateur de flexion (13, 21, 33, 40, 96, 106).
  2. Carburateur pour moteur diesel selon la revendication 1, caractérisé en ce qu'on utilise comme transformateur de flexion une membrane piézoélectrique (33).
  3. Carburateur pour moteur diesel selon une des revendications 1 ou 2, caractérisé en ce que l'actionneur piézoélectrique est relié à un élément de réglage (10) servant à régler la section transversale d'écoulement.
  4. Carburateur pour moteur diesel selon une des revendications précédentes, caractérisé en ce que l'actionneur piézoélectrique est disposé dans un espace exempt de carburant.
  5. Carburateur pour moteur diesel selon la revendication 4, caractérisé en ce que l'espace exempt de carburant est isolé de la zone de guidage du carburant par une membrane imperméable au carburant (45).
  6. Carburateur pour moteur diesel selon la revendication 6, caractérisé en ce que la membrane (45) est fixée d'une part à l'élément de réglage (44) et d'autre part au boítier de l'élément de réglage (42).
  7. Carburateur pour moteur diesel selon une des revendications précédentes, caractérisé en ce que l'actionneur piézoélectrique (96) rétrécit la section transversale d'écoulement de la conduite de carburant (98) pour constituer l'injecteur de carburant.
  8. Carburateur pour moteur diesel selon une des revendications précédentes, caractérisé en ce que l'actionneur piézoélectrique bouge dans le gaz d'échappement en fonction de la valeur lambda.
EP03006885A 2002-04-11 2003-03-31 Carburateur pour moteurs a essence avec buse de combustible réglable Expired - Lifetime EP1353058B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10216084A DE10216084A1 (de) 2002-04-11 2002-04-11 Vergaser für Otto-Motor mit einstellbarer Brennstoffdüse
DE10216084 2002-04-11

Publications (3)

Publication Number Publication Date
EP1353058A2 EP1353058A2 (fr) 2003-10-15
EP1353058A3 EP1353058A3 (fr) 2004-01-21
EP1353058B1 true EP1353058B1 (fr) 2005-11-09

Family

ID=28051261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03006885A Expired - Lifetime EP1353058B1 (fr) 2002-04-11 2003-03-31 Carburateur pour moteurs a essence avec buse de combustible réglable

Country Status (3)

Country Link
EP (1) EP1353058B1 (fr)
AT (1) ATE309459T1 (fr)
DE (2) DE10216084A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8894043B2 (en) 2009-05-27 2014-11-25 Makita Corporation Electrically activated carburettor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7509941B2 (en) 2006-03-08 2009-03-31 Phelon Euro Ab Apparatus and method for adjusting air-to-fuel ratio for small gasoline engine
US8757121B1 (en) 2010-01-12 2014-06-24 Walbro Engine Management, L.L.C. Supplying supplementary fuel for engine startup
DE102019217720A1 (de) * 2019-11-18 2021-05-20 Elringklinger Ag Treibdüse und Strahlpumpe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905634A1 (de) * 1969-02-05 1970-08-20 Messerschmitt Boelkow Blohm Duese mit veraenderbarem Querschnitt
GB1470166A (en) * 1973-05-12 1977-04-14 Cav Ltd Fuel injection pumping apparatus
JPS55104555A (en) * 1979-01-31 1980-08-11 Aisan Ind Co Ltd Fuel supply device for internal combustion engine
DE3028091C2 (de) * 1979-08-02 1985-09-12 Fuji Jukogyo K.K., Tokio/Tokyo Luftbrennstoffverhältnisregelsystem für einen Verbrennungsmotor
JPS6210463A (ja) * 1985-07-05 1987-01-19 Mikuni Kogyo Co Ltd 混合気供給装置の燃料系
DE3813837A1 (de) * 1988-04-23 1989-11-02 Licentia Gmbh Multifunktionale dreidimensionale schaltung
DE19607165A1 (de) * 1996-02-26 1997-08-28 Christian Fallert Nachrüstsatz zur geregelten Katalyse von Motorabgasen
DE19913073C2 (de) * 1999-03-23 2001-04-05 Wacker Werke Kg Kraftstoff-Dosiervorrichtung
IT1310126B1 (it) * 1999-07-20 2002-02-11 Fiat Ricerche Attuatore piezoelettrico per l'iniezione di carburante

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8894043B2 (en) 2009-05-27 2014-11-25 Makita Corporation Electrically activated carburettor

Also Published As

Publication number Publication date
DE10216084A1 (de) 2003-10-30
ATE309459T1 (de) 2005-11-15
EP1353058A2 (fr) 2003-10-15
EP1353058A3 (fr) 2004-01-21
DE50301584D1 (de) 2005-12-15

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