EP0036188A2 - Dispositif pour l'atomisation du combustible dans un moteur à combustion interne - Google Patents

Dispositif pour l'atomisation du combustible dans un moteur à combustion interne Download PDF

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Publication number
EP0036188A2
EP0036188A2 EP81101844A EP81101844A EP0036188A2 EP 0036188 A2 EP0036188 A2 EP 0036188A2 EP 81101844 A EP81101844 A EP 81101844A EP 81101844 A EP81101844 A EP 81101844A EP 0036188 A2 EP0036188 A2 EP 0036188A2
Authority
EP
European Patent Office
Prior art keywords
fuel
atomizer
engine
voltage
pulses
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.)
Withdrawn
Application number
EP81101844A
Other languages
German (de)
English (en)
Other versions
EP0036188A3 (fr
Inventor
Valentin Dipl.-Phys. Mágori
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0036188A2 publication Critical patent/EP0036188A2/fr
Publication of EP0036188A3 publication Critical patent/EP0036188A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B17/00—Engines characterised by means for effecting stratification of charge in cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/041—Injectors peculiar thereto having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements

Definitions

  • the invention relates to a device as specified in the preamble of claim 1.
  • the invention provides for the use of a piezoelectric atomizer, as is known in principle from German patent specification 20 32 433 (70/7034).
  • a piezoelectric atomizer has also been widely used as an atomizer in an inhalation device according to German patent specification 26 37 162 (76 P 7097).
  • electrical alternating voltage with preferably e.g. 100 kHz is operated, a very fine droplet mist e.g. also produce gasoline and similar fuel for internal combustion engines.
  • the atomizer is arranged in the intake pipe of the internal combustion engine such that fuel mist generated by the atomizer is transported together with the intake air into the cylinder of the engine.
  • controllable electronic circuit which is used not only to generate and supply an excitation alternating voltage for the atomizer.
  • This new combined function is particularly noteworthy because an atomizer has not previously been used in a switch function.
  • the fuel supply takes place continuously over time, wherein a rough control of the amount of fuel supplied, which is adapted to the total fuel consumption of the respective load operation, is preferably provided.
  • the fuel supply from the working cycle of the engine, synchronized with this cycle, into the individual cylinders is provided by the atomizer, which is controlled according to one feature of the invention. It is because a certain amount of fuel can be dripped or sprayed onto the atomizer plate of the atomizer (which is not yet vibrating) Maintain wetting layer or accumulate with continuous fuel supply. This accumulated amount of fuel is increased with the onset of the atomizer vibration, i.e. with the application of the excitation alternating voltage to the atomizer, practically suddenly converted into a pulse of a fuel spray.
  • the duration of this pulse is comparatively short to, or at most approximates, the duration of a cycle of the internal combustion engine.
  • a fuel mist pulse generates a comparatively short duration that can, the temporal occurrence of which can be placed in the final phase of the intake stroke of the internal combustion engine.
  • This measure of the invention ensures that only the air last sucked in, ie the air which is ultimately predominantly in the vicinity of the intake valve in the cylinder, contains this fuel mist generated in pulses, whereas air sucked in before the impulse occurs is practically free of fuel mist is.
  • Such pure air is then in the area of the cylinder interior close to the piston.
  • the spark plug is located near the intake valve and thus in the area of the partial cylinder volume in which there is air mixed with the fuel mist in an optimal mixture ratio, and that too. still in the compressed state or at top dead center of the piston when the ignition takes place.
  • control of the motor can be easily adapted to different load operation, namely by / increasing the pulse width of the atomization Berimpulses with optionally adjusted readjusted fuel supply, the control of which, however, as mentioned above, is carried out in a simple manner and, as is known, for example also continuously.
  • the envisaged active partial volume of the cylinder interior always has an optimal gasoline-air quantity ratio and that the remaining partial volume of the cylinder contains practically only pure air filling.
  • FIG. 1 shows an overall view of a device according to the invention together with a partial representation of a cylinder 11 and a piston 12 of an internal combustion engine.
  • 13 is an air filter and 14 denotes the intake duct of the engine.
  • the arrows 15 and 16 denote the air flow in the intake duct.
  • With 17 the atomizer is indicated, which is held by means of the brackets 18 in the air duct 14.
  • the position of the atomizer 17 in the intake duct 14 is essentially selected so that the intake air flow receives virtually no fuel from the atomizer and from the supply line, as long as the atomizer 17 does not oscillate with its intended amplitude.
  • the fuel is supplied to the atomizer 17 via the pipeline 19 with the aid of a fuel delivery pump 20 which delivers an especially controllable amount of fuel.
  • 21 denotes an optionally provided baffle plate for supplied fuel, and for the sake of clarity, fastening devices in the intake duct 14 for the baffle plate 21 are not shown.
  • a power supply line for the piezoelectric atomizer 17 is designated.
  • the second power supply conductor lying against the mass of the intake duct 14 is draws.
  • the atomizer 17 is connected to a terminal, for example via its support 18, 14 in this mass of the air duct at 24 is a total of the electronic formwork 'tung specified, from which the excitation AC voltage for the sprayer 17, with, for example 100 kHzeans the voltage U, the vehicle.
  • this excitation alternating voltage is also converted into pulses which can be controlled with regard to time and duration.
  • the circuit 24 receives synchronous signals from the camshaft 26 of the intake valve 27 via a connection 25 which is only shown in principle. Corresponding synchronous control can also be carried out by the crankshaft, taking into account the working sequence of the 4-stroke principle. Basically, the invention can also be used accordingly in 2-stroke engines.
  • 28 denotes a supply line via which a control signal of the circuit 24 is supplied which corresponds to the throttle lever position, ie the load operation of the engine desired by the driver.
  • the signal supplied via the line 28 essentially controls the pulse width 29 of the pulse 30 of the periodically generated pulse excitation alternating voltage 30.
  • the pulse time of the pulse 30 is. Synchronized with the clock phase of the piston 12 in the cylinder 11 via the connection 25 already mentioned.
  • the mode of operation of the device according to the invention is that when the piston 12 goes down during the suction phase, first pure air corresponding to the flows 15 and 16 is sucked into the cylinder volume.
  • the pulse voltage 30 is not supplied to the atomizer 17 until the end of the intake stroke, whereby in the meantime fuel accumulated between the atomizing plate 117 and the baffle plate 21 is suddenly atomized by this atomizing plate 117 into a fine fuel mist which is then carried along by the air stream 16. Since this only takes place towards the end of the intake phase, essentially only the upper portion 32 of the entire inner volume of the cylinder is enriched with the fuel mist.
  • the partial volume 31 is an air buffer, which is also advantageously effective.
  • the atomizer 17 provided it is expedient to allow the atomizer 17 provided to oscillate with a small amplitude in the times between the atomization processes or shortly before the start of the atomization pulse. This enables the atomizer to swing even faster and to reach the maximum amplitude. This "small" amplitude is so small that it does not lead to any noteworthy fuel atomization and does not disturb the fuel accumulation mentioned in the meantime.
  • An internal combustion engine equipped with a device according to the invention operates in partial load operation and in idle operation, for which the invention is primarily intended, practically like an engine with a considerably smaller cylinder volume, which is operated at more or less full load.
  • the pulse duration 29, ie the duration of the generation of a force Fabric mist (with a correspondingly increased fuel supply 20), controllably stretchable to the total length of the intake stroke can be easily achieved with the invention that the partial volume 32 with a homogeneously distributed fuel mist a substantial portion of the total volume of the cylinder 11 or even fills the total volume, which corresponds to the full load operation of the engine in question (which then corresponds to the full load operation of a conventional known engine with regard to the fuel distribution in the cylinder).
  • An internal combustion engine equipped with the invention can thus also be operated in the partial load range as if it were full load operation of an engine with a correspondingly smaller volume and a correspondingly smaller maximum output.
  • the invention is not only an essential contribution to better use of the fuel, i.e. to save fuel, but it also brings benefits in terms of environmental protection.
  • the currently customary carburetor engines have the disadvantage that they operate in idle mode and also in push mode, i.e. then when the throttle is withdrawn at a relatively high vehicle speed and the throttle valve is closed, combustion is only very incomplete and therefore unclean.
  • a complete interruption of the fuel supply can be carried out in a very simple manner, namely by temporarily eliminating the periodic atomization pulses (with a correspondingly throttled or switched-off fuel supply 20), as is the case for diesel engines with an engine brake and corresponding special equipment against diesel is known.

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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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP81101844A 1980-03-13 1981-03-12 Dispositif pour l'atomisation du combustible dans un moteur à combustion interne Withdrawn EP0036188A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3009717 1980-03-13
DE19803009717 DE3009717A1 (de) 1980-03-13 1980-03-13 Vorrichtung zur kraftstoff-zerstaeubung in einem verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP0036188A2 true EP0036188A2 (fr) 1981-09-23
EP0036188A3 EP0036188A3 (fr) 1981-10-28

Family

ID=6097133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101844A Withdrawn EP0036188A3 (fr) 1980-03-13 1981-03-12 Dispositif pour l'atomisation du combustible dans un moteur à combustion interne

Country Status (5)

Country Link
EP (1) EP0036188A3 (fr)
JP (1) JPS56143319A (fr)
BR (1) BR8101461A (fr)
DE (1) DE3009717A1 (fr)
PT (1) PT72646B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939547A1 (de) * 1989-11-30 1991-06-06 Bosch Gmbh Robert Vorrichtung zur kraftstoffeinspritzung in brennkraftmaschine
WO1992012340A1 (fr) * 1990-12-28 1992-07-23 Creative Power Development In Malmö Ab Procede et dispositif permettant de pulveriser un combustible liquide
WO2008132696A1 (fr) * 2007-04-30 2008-11-06 The Procter & Gamble Company Appareil de pulvérisation ultrasonore pour revêtir un substrat

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1054348A (fr) * 1951-01-31 1954-02-09 Daimler Benz Ag Procédé et dispositif pour assurer le fonctionnement de moteurs à combustion interne
FR1565829A (fr) * 1968-05-10 1969-05-02
GB1311879A (en) * 1969-06-25 1973-03-28 Plessey Co Ltd Fuel-injection systems for internal-combustion engines fed with a fuel-and-air mixture
FR2180753A1 (fr) * 1972-12-01 1973-11-30 Plessey Handel Investment Ag
IT1061531B (it) * 1975-06-12 1983-04-30 Plessey Handel Investment Ag Sistema di alimentazione di carburante per un motore a combustione interna
FR2929331B1 (fr) * 2008-03-26 2015-01-16 Renault Sas Moteur de vehicule comprenant un dispositif de refroidissement de la zone inter-soupapes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939547A1 (de) * 1989-11-30 1991-06-06 Bosch Gmbh Robert Vorrichtung zur kraftstoffeinspritzung in brennkraftmaschine
US5040514A (en) * 1989-11-30 1991-08-20 Robert Bosch Gmbh Arrangement for injecting fuel for an internal combustion engine
DE3939547C2 (de) * 1989-11-30 1999-07-01 Bosch Gmbh Robert Vorrichtung zur Kraftstoffeinspritzung in Brennkraftmaschine
WO1992012340A1 (fr) * 1990-12-28 1992-07-23 Creative Power Development In Malmö Ab Procede et dispositif permettant de pulveriser un combustible liquide
WO2008132696A1 (fr) * 2007-04-30 2008-11-06 The Procter & Gamble Company Appareil de pulvérisation ultrasonore pour revêtir un substrat
AU2008243785B2 (en) * 2007-04-30 2011-03-03 Pringles S.A.R.L. Ultrasonic spray apparatus to coat a substrate

Also Published As

Publication number Publication date
EP0036188A3 (fr) 1981-10-28
DE3009717A1 (de) 1981-09-24
JPS56143319A (en) 1981-11-09
PT72646B (de) 1982-03-19
PT72646A (de) 1981-04-01
BR8101461A (pt) 1981-09-15

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Effective date: 19821004

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Inventor name: MAGORI, VALENTIN, DIPL.-PHYS.