EP1124059A1 - Verfahren zum zünden des luft-brennstoffgemisches in einer brennkraftmaschine - Google Patents

Verfahren zum zünden des luft-brennstoffgemisches in einer brennkraftmaschine Download PDF

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Publication number
EP1124059A1
EP1124059A1 EP98966931A EP98966931A EP1124059A1 EP 1124059 A1 EP1124059 A1 EP 1124059A1 EP 98966931 A EP98966931 A EP 98966931A EP 98966931 A EP98966931 A EP 98966931A EP 1124059 A1 EP1124059 A1 EP 1124059A1
Authority
EP
European Patent Office
Prior art keywords
electrical field
intensity
spark plug
piezo
electrode gap
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Withdrawn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
EP98966931A
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English (en)
French (fr)
Inventor
Elena Igorevna Krutova
Jury Leonidovich Spirin
Vladimir Stepanovich Dubinin
Dmitry Vladimirovich Frolov
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.)
Oxis Energy Ltd
Original Assignee
Oxis Energy Ltd
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 Oxis Energy Ltd filed Critical Oxis Energy Ltd
Publication of EP1124059A1 publication Critical patent/EP1124059A1/de
Withdrawn legal-status Critical Current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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/12—Piezoelectric ignition; Electrostatic ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression

Definitions

  • This invention relates to the technology of igniting fuel mixtures, more specifically to processes for ion-plasma combustion (ignition), providing an increase in volume in the initial combustion region (space ignition).
  • This ignition process is energy-consuming.
  • the design of the plug is complex and fuel consumption is increased.
  • Fig. 1 shows the dependence of voltage at the spark plug electrodes obtained in implementing this process (Ross Tveg, Ignition systems for cars. - Moscow: “Za rulyom” Publishing House, 1998, fig. 2, page 5).
  • This ignition process is ecologically cleaner, since the introduction of an additional quantity of charged particles into the combustion chamber improves the ignition process and the subsequent combustion of the mixture in the engine cylinder is more complete.
  • the presence of additional charged particles improves conditions for the combustion of the mixture in the cylinder, which reduces the quantity of toxic substances and decreases the amount of energy consumed by the process.
  • the main problem to be solved by this invention is the creation of a process and system for the ignition of fuel-air mixture which provide improved economy and reduced toxicity by a more uniform ignition process and more complete combustion of the fuel-air mixture.
  • the fuel-air mixture ignition process comprises the following successively implemented stages:
  • Stage (a) is implemented in an alternating electrical field, using a harmonic alternating field with the duration of each half-wave in turn greater than the preceding one.
  • the electrical field is taken away gradually, using an alternating electrical field.
  • the stepped (by nanosecond units) reduction in the intensity of the electrical field to a set level determined by the minimum current magnitude in the electrode gap, and the subsequent fixing of this level, enable the current in the spark plug electrode gap to be maintained at not less than a certain magnitude, and the fuel-air mixture to flow into the region bounded by the spark plug electrode gap from the peripheral regions of the combustion chamber to support the discharge for 2.5-25 ⁇ sec.
  • the stepped inversion of the electrical field with the subsequent stepped rise (in steps of the order of one microsecond) in the intensity of the electrical field to spark-over level and the stepped reduction in intensity to the set level at which it was fixed, alters the gradient of concentration of free radicals in the spark plug electrode gap, improving conditions for the combustion of the fuel-air mixture between the spark plug electrodes and making the combustion process virtually continuous.
  • stages (d) to (g) (a hundred times or more) over the whole ignition cycle makes it possible to burn the fuel-air mixture more efficiently and to raise the efficiency of the engine and its ecological characteristics by increasing the duration of the continuous discharge by a factor of two or more.
  • combustion completion stage The gradual reduction in the intensity of the electrical field at the end of the ignition cycle (combustion completion stage) makes it possible to prolong the period of existence of the free radicals in the spark plug electrode gap and to ensure the more complete combustion of the fuel-air mixture.
  • the alternating nature of the electrical field at this stage enables more free radicals to be injected into the combustion chamber and provides more efficient completion of the combustion of the fuel-air mixture.
  • the fixing of the current in the spark plug electrode gap enables the process of combustion of the fuel air mixture to be stabilised if its parameters and combustion conditions change.
  • the high-frequency radiation occurring in the spark plug electrode gap at stages (c) and (g) is due to the thermodynamic instability caused by the presence of a gradient of concentration of positively and negatively charged free radicals, creating screened regions close to the spark plug electrodes, thus preventing the combustion process.
  • the fixing of the set level of intensity before the moment when high-frequency radiation occurs with subsequent stepped inversion of the electrical field alters the gradient of concentration of the free radicals and thus stops the high-frequency radiation, so that the screened regions created by the, three-dimensional discharge close to the spark plug electrodes can be eliminated.
  • the fuel-air mixture ignition system in accordance with this invention includes a generator with switching-on and switching-off input and a piezo-transformer, with its input connected to the output of the said generator. Unlike known ignition systems, it contains a reorientation resonator, combined in the design with a piezo-transformer, and forming with it a single piezo-element, the output of which is connected to the spark plug electrode.
  • the generator of the ignition system may also contain a synchronisation input and a discharge current control input, in which case the system has two feedbacks from the piezo-element to the generator, one of which is connected to the said synchronisation input and the other to the said discharge current control input.
  • the inclusion in the ignition system of a reorientation resonator combined in the design with the piezo-transformer and forming with it a single piezo-element enables an internal feedback to be created in the piezo-element to bring about the inversion of its output signal when high-frequency radiation occurs in the spark plug ignition gap.
  • Fig, 1 shows the dependence of the voltage at the spark plug electrodes in the known process.
  • Fig. 2 is a time diagram, illustrating the proposed process in accordance with the invention.
  • Fig. 3 is a block diagram of the ignition system in accordance with this invention.
  • Fig. 4 shows graphs of the controlling pulse voltages and the excitation voltage.
  • Fig. 5 shows another variant of block diagram of the ignition system in accordance with this invention.
  • FIG. 2 shows: U - axis of voltage between spark plug electrodes; t - time; U init.o - initial spark-over voltage; U break rep - repeat spark-over voltage; U stab - stabilisation voltage; t build-up - duration of gradual build-up of intensity of electrical field; t red - duration of gradual reduction in intensity of electrical field.
  • the block-diagram shown in Fig. 3 of an ignition system implementing the fuel-air ignition process in an internal combustion engine in accordance with the invention includes spark plug 5, piezo-transformer 2 and generator 1 with switching-on and switching-off input 7, the output of which is connected to the input of piezo-transformer 2, and also re-orientation resonator 3, combined in the design with piezo-transformer 2 and forming with it a single piezo-element 4, as a result of which an internal feedback 6 is formed.
  • the input of piezo-element 4 is connected to the electrode of spark plug 5.
  • the sine curve signal (Fig. 4b) for the duration t cont of the control pulse from the output of the generator 1, goes to the signal input of the piezo-electric transformer 2 and on through the series-wired reorientation resonator 3 forming the single piezo-element with the piezo-transformer 2, to the electrode of the spark plug 5.
  • the amplitude of the sine curve signal at its output will build up gradually in accordance with the law [1 - exp(-t/ 2 )] for time t build-up ⁇ 0.5 msec (see Fig. 2) to magnitude U init.o ⁇ 10 kV, i.e. up to the moment that discharge formation begins. This ensures a gradual rise in the intensity of the electrical field in the spark plug electrode gap (stage a).
  • step reduction of voltage occurs down to the set level U stab ⁇ 650 V, at which it is maintained virtually up to the end of the current half-period of the excitation voltage in stages (b) and (c) of the process.
  • the set level is achieved by selecting the amplitude of the build-up sine curve sent to the input of the piezo-element 4.
  • the voltage builds up to spark-over level U break rep ⁇ 2 kV, which is only about a fifth of the initial spark-over level U init.o, due to the presence of residual ionisation (free radicals) in the electrode gap of the spark plug 5 (stage e of the process).
  • the voltage again falls to the set level U stab , at which it is maintained virtually up to the end of the current half-period of the excitation voltage (stages c and g of the process).
  • the amplitude of the sine curve signal at its output begins to diminish gradually in accordance with the exponential law for time t red ⁇ 0.5 msec, which ensures a gradual reduction in the intensity of the alternating electrical field.
  • the block diagram of the ignition system shown in Fig. 5 differs from that shown in Fig. 3 in that the generator 1 also contains a synchronisation input 8 and a discharge current control input 9. There are two feedbacks from the piezo-element, one of which is connected to the synchronisation input 8 and the other to the discharge current control input 9 of the generator 1.
  • the introduction of a feedback via the generator synchronisation input 8 makes it possible to synchronise the inversion of the output signal of the piezo-element 4 with the change of phase of the output signal of the generator 1, and the connecting of the feedback to the discharge current control input 9 of the generator 1 makes it possible automatically to maintain a fixed current level in the electrode gap of the spark plug 5, e.g. by altering the output power of the generator 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
EP98966931A 1998-11-12 1998-11-12 Verfahren zum zünden des luft-brennstoffgemisches in einer brennkraftmaschine Withdrawn EP1124059A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU1998/000373 WO2000029745A1 (fr) 1998-11-12 1998-11-12 Procede d'allumage du melange air-carburant dans un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1124059A1 true EP1124059A1 (de) 2001-08-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966931A Withdrawn EP1124059A1 (de) 1998-11-12 1998-11-12 Verfahren zum zünden des luft-brennstoffgemisches in einer brennkraftmaschine

Country Status (10)

Country Link
EP (1) EP1124059A1 (de)
JP (1) JP2002530571A (de)
KR (1) KR20010109518A (de)
CN (1) CN1322279A (de)
AU (1) AU760306B2 (de)
BR (1) BR9816115A (de)
CA (1) CA2350454A1 (de)
EA (1) EA003162B1 (de)
MX (1) MXPA01004858A (de)
WO (1) WO2000029745A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016668A1 (de) * 2009-03-31 2010-10-07 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Brennverfahren für einen fremdgezündeten Verbrennungsmotor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103857901B (zh) * 2011-10-31 2016-05-04 日产自动车株式会社 内燃机的点火装置及点火方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2623865A1 (de) * 1976-05-28 1977-12-08 Bosch Gmbh Robert Zuendanlage, insbesondere fuer brennkraftmaschinen
SU907290A1 (ru) * 1980-06-19 1982-02-23 Уфимский авиационный институт им. Орджоникидзе Пьезоэлектрический генератор конденсаторной системы зажигани
JPS57206776A (en) * 1981-06-16 1982-12-18 Nissan Motor Co Ltd Plasma ignition device
JPS58131367A (ja) * 1982-01-29 1983-08-05 Nissan Motor Co Ltd 内燃機関用点火装置
SU1368936A1 (ru) 1986-04-07 1988-01-23 Институт Проблем Машиностроения Ан Усср Свеча зажигани дл двигател внутреннего сгорани
SU1464274A1 (ru) 1987-07-21 1989-03-07 Ленинградский Электротехнический Институт Связи Им.Проф.М.А.Бонч-Бруевича Преобразователь посто нного напр жени в переменное квазисинусоидальное ступенчатое напр жение
RU2056521C1 (ru) * 1994-06-16 1996-03-20 Владимир Андреевич Щербатюк Способ воспламенения топливной смеси в двигателе внутреннего сгорания и коммутатор системы зажигания двигателя внутреннего сгорания
JP3669600B2 (ja) * 1994-12-29 2005-07-06 本田技研工業株式会社 内燃機関の点火装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0029745A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016668A1 (de) * 2009-03-31 2010-10-07 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Brennverfahren für einen fremdgezündeten Verbrennungsmotor
DE102009016668B4 (de) * 2009-03-31 2020-04-02 Mwi Micro Wave Ignition Ag Brennverfahren für einen fremdgezündeten Verbrennungsmotor

Also Published As

Publication number Publication date
CN1322279A (zh) 2001-11-14
EA003162B1 (ru) 2003-02-27
AU760306B2 (en) 2003-05-15
CA2350454A1 (en) 2000-05-25
BR9816115A (pt) 2001-08-14
JP2002530571A (ja) 2002-09-17
KR20010109518A (ko) 2001-12-10
WO2000029745A1 (fr) 2000-05-25
MXPA01004858A (es) 2002-09-18
EA200100488A1 (ru) 2001-10-22
AU2644899A (en) 2000-06-05

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