EP2307702B1 - Pilotage de l'alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne - Google Patents

Pilotage de l'alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne Download PDF

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Publication number
EP2307702B1
EP2307702B1 EP09757711.8A EP09757711A EP2307702B1 EP 2307702 B1 EP2307702 B1 EP 2307702B1 EP 09757711 A EP09757711 A EP 09757711A EP 2307702 B1 EP2307702 B1 EP 2307702B1
Authority
EP
European Patent Office
Prior art keywords
voltage
spark
electric
spark plug
stage
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.)
Not-in-force
Application number
EP09757711.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2307702A2 (fr
Inventor
Maxime Makarov
Frederic Auzas
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.)
Renault SAS
Original Assignee
Renault SAS
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Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2307702A2 publication Critical patent/EP2307702A2/fr
Application granted granted Critical
Publication of EP2307702B1 publication Critical patent/EP2307702B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • 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
    • 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
    • F02P9/007—Control of spark intensity, intensifying, lengthening, suppression by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition

Definitions

  • the present invention relates to a method of supplying an electric spark plug to an electrical voltage ensuring the generation of a branched ignition spark, in particular of an internal combustion engine.
  • the present invention aims at avoiding the performance limitations of the solutions of the prior art.
  • Another object is to significantly increase the degree of branching of the radiofrequency spark (that is to say the total number of filaments simultaneously generated) and thus increase this spark and therefore its ignition efficiency of the mixture coming into its environment.
  • a proposed solution to at least tend towards this (these) goal (s) is that the power supply of the candle (in particular radiofrequency) comprises a stage of increase in stages (with thus at least such a step), until to the appropriate ignition voltage, the supply voltage of this candle.
  • the electrical energy supply means of the spark plug be adapted to generate a first spark ignition voltage and, for then, increasing this first electrical voltage step (s) until said adapted ignition voltage.
  • FIG. 1 a radiofrequency (RF) resonant candle 1 mounted on the cylinder head 3 of an internal combustion engine 5 is seen.
  • the tip 1a of the spark plug opens into the combustion chamber 7 of the engine where the mixture is injected to ignite.
  • This RF plasma candle 1 is excited by a low voltage RF power supply 9 driven by a computer 11 on board the vehicle provided with said engine. Each multi-filament spark 13 is thus formed from the single tip of the candle.
  • the electric voltage U applied to the spark plug increases continuously so that the thin electric channels 13 are formed from the tip of the candle.
  • such a multi-filament structure is, during the next phase 15b (between t_1 and t_2 fig.1 ), heated up to a few thousand ° C by the electric current supplied by the controlled RF power supply 9.
  • the voltage (substantially Um ) applied to the candle remains (approximately) constant throughout this second phase.
  • the hot filaments cause ignition of the mixture in the cylinder of the internal combustion engine to which the combustion chamber 7 is associated.
  • the length L (of the order of one cm; fig.1 ) filaments 13 formed at the end of the phase 15b1 depends only on the maximum amplitude of the voltage U applied to the tip la.
  • the amplitude of the RF voltage Um corresponding to the maximum electrical voltage (or adapted ignition voltage) applied to the tip of the spark plug, is kept stable (constant), the length of the filaments 13 and their number do not change anymore or almost no longer.
  • the degree of branching that is to say the number of bifurcation points, such as those identified 13a, 13b figure 1
  • the filaments formed during the formation phase are rather straight with few bifurcation points (2-3 at most, typically) which limits the size of the spark.
  • the inventors propose to modify the power supply mode of the RF candle 1, as illustrated in particular. figure 3 .
  • the RF power supply stabilizes the amplitude of the applied voltage and maintains it substantially at U1 for a few ⁇ s (from 2 to 5 ⁇ s in the proposed embodiment) until time t_20.
  • the value U1 of the voltage at this first voltage bearing 17.1 will be just necessary for the formation, at the free end 1a of the electrode, of electrical filaments from this end.
  • the RF supply increases again (continuously) the amplitude of the voltage of the spark plug, up to the intermediate voltage U2 (with of course U2 greater than U1 ).
  • the difference of voltages between the zero voltage and. that U1 of the first voltage stage will be greater than the difference of electrical voltages between the voltage U1 of the first voltage stage and the said matched ignition voltage Um , as shown schematically fig.3,4 .
  • the diameter of the ionized filaments 130 (typically of the order of 50-100 ⁇ m) is substantially smaller than that of the tip (typically of the order of 500 ⁇ m)
  • the tip typically of the order of 500 ⁇ m
  • the new filaments, marked 130 "b” always figure 3 , originate from the ends of filaments "a” and not from the tip of the candle.
  • the RF supply further increases the voltage of the candle 1a, causing the birth of the 3rd generation of the filaments 130 "c" from the ends of the filaments of the previous generation.
  • such a multi-filamentary structure is, during the next phase 150b, heated (as above) until to a few thousand ° C by the electric current supplied by the controlled RF power supply 9.
  • the voltage (Um) applied to the candle remains (substantially) constant throughout this second phase, as shown fig.3 .
  • the hot filaments cause the ignition of the mixture in the cylinder of the internal combustion engine to which the combustion chamber 7 is associated.
  • a duration of voltage steps between two increases in voltage (such as t_10 - t_20 and t_30 - t_40) will be applied greater than the time interval between two successive increments of increase of said voltage (such as t_20 - t_30).
  • the electric power supply means 9, 11 will have been adapted in relation to the previous situation of the fig.2 for, as and when the bearings 17.1 ... beyond the first ignition voltage U1 spark, generate the creation of new branches 130b ... at the end (round (s) full ( s)) of the electric spark created at the first landing.
  • the spark 130 generally formed in this way is characterized by a much higher degree of branching than in the case of the conventional excitation schematized fig.2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP09757711.8A 2008-06-05 2009-05-05 Pilotage de l'alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne Not-in-force EP2307702B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0853737A FR2932229B1 (fr) 2008-06-05 2008-06-05 Pilotage de l'alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne
PCT/FR2009/050818 WO2009147335A2 (fr) 2008-06-05 2009-05-05 Pilotage de l' alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP2307702A2 EP2307702A2 (fr) 2011-04-13
EP2307702B1 true EP2307702B1 (fr) 2015-10-14

Family

ID=40329276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09757711.8A Not-in-force EP2307702B1 (fr) 2008-06-05 2009-05-05 Pilotage de l'alimentation electrique d'une bougie d'allumage d'un moteur a combustion interne

Country Status (9)

Country Link
US (1) US8925532B2 (ko)
EP (1) EP2307702B1 (ko)
JP (1) JP5276714B2 (ko)
KR (1) KR20110027753A (ko)
CN (1) CN102105677B (ko)
FR (1) FR2932229B1 (ko)
MX (1) MX2010013200A (ko)
RU (1) RU2497019C2 (ko)
WO (1) WO2009147335A2 (ko)

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FR2943739B1 (fr) 2009-03-24 2015-09-04 Renault Sas Procede d'allumage d'un melange de comburant pour moteur thermique
EP2508729A4 (en) * 2009-11-30 2017-06-28 Imagineering, Inc. Internal combustion engine control device
DE102010015344B4 (de) * 2010-04-17 2013-07-25 Borgwarner Beru Systems Gmbh Verfahren zum Zünden eines Brennstoff-Luft-Gemisches einer Verbrennungskammer, insbesondere in einem Verbrennungsmotor durch Erzeugen einer Korona-Entladung
JP5351874B2 (ja) 2010-11-25 2013-11-27 日本特殊陶業株式会社 プラズマ点火装置およびプラズマ点火方法
DE102012100841B3 (de) * 2012-02-01 2013-05-29 Borgwarner Beru Systems Gmbh Verfahren zum Steuern des Zündzeitpunktes in einem Verbrennungsmotor mittels einer Korona-Entladung
US9318881B2 (en) * 2012-12-21 2016-04-19 Federal-Mogul Ignition Company Inter-event control strategy for corona ignition systems
CN104076726B (zh) * 2014-07-09 2017-02-01 安徽研扬科贸有限公司 一种加热丝电源控制方法
US9484719B2 (en) 2014-07-11 2016-11-01 Ming Zheng Active-control resonant ignition system
US10819696B2 (en) * 2017-07-13 2020-10-27 Microsoft Technology Licensing, Llc Key attestation statement generation providing device anonymity

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DE2611596C2 (de) * 1976-03-19 1985-06-20 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und Vorrichtung zur Erzeugung von Zündfunken bei hohem Zündspannungsbedarf für Zündanlagen von Brennkraftmaschinen
FR2497273B1 (fr) * 1980-12-29 1985-09-20 Onera (Off Nat Aerospatiale) Procede et dispositif pour allumage d'un melange carbure
US4589398A (en) * 1984-02-27 1986-05-20 Pate Ronald C Combustion initiation system employing hard discharge ignition
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Also Published As

Publication number Publication date
WO2009147335A2 (fr) 2009-12-10
MX2010013200A (es) 2011-03-15
US20110139135A1 (en) 2011-06-16
FR2932229B1 (fr) 2011-06-24
JP5276714B2 (ja) 2013-08-28
CN102105677B (zh) 2014-01-22
EP2307702A2 (fr) 2011-04-13
US8925532B2 (en) 2015-01-06
RU2010154154A (ru) 2012-07-20
JP2011522165A (ja) 2011-07-28
FR2932229A1 (fr) 2009-12-11
CN102105677A (zh) 2011-06-22
RU2497019C2 (ru) 2013-10-27
WO2009147335A3 (fr) 2010-01-28
KR20110027753A (ko) 2011-03-16

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