EP2012004A1 - Dispositif d'allumage à haute fréquence et son procédé de fonctionnement - Google Patents

Dispositif d'allumage à haute fréquence et son procédé de fonctionnement Download PDF

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Publication number
EP2012004A1
EP2012004A1 EP07012991A EP07012991A EP2012004A1 EP 2012004 A1 EP2012004 A1 EP 2012004A1 EP 07012991 A EP07012991 A EP 07012991A EP 07012991 A EP07012991 A EP 07012991A EP 2012004 A1 EP2012004 A1 EP 2012004A1
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EP
European Patent Office
Prior art keywords
resonator
generator
frequency
energy
circuits
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Withdrawn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
EP07012991A
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German (de)
English (en)
Inventor
Volker Heise
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP07012991A priority Critical patent/EP2012004A1/fr
Publication of EP2012004A1 publication Critical patent/EP2012004A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02P3/00—Other installations
    • F02P3/005—Other installations having inductive-capacitance energy storage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/36—Circuit arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy

Definitions

  • the invention relates to a high-frequency ignition device and a method for operating such a device.
  • High-frequency ignition devices and corresponding operating methods are known per se and are used, for example, as ignition devices for internal combustion engines, ie, for example, gasoline engines. Exemplary becomes on EP 0 211 133 B1 and WO 03 / 046374A1 directed.
  • the Hochfrequenzzünd shark's eye comprises two coupled resonant circuits, wherein generated in a generator called the first resonant circuit of the two coupled resonant circuits, a voltage increase and in a resonator referred to as the second resonant circuit of the two coupled coupled oscillatory circuits, wherein the generator from a source, eg the electrical system of a motor vehicle comprising the internal combustion engine, fed and via an electrical switching element, in particular a circuit breaker, is excited in accordance with a control of the switching element, provided that recorded in one of the electrical resonant circuits, in particular in the resonator, stored energy and evaluated for driving the switching element, wherein the driving of the switching element takes place with an excitation frequency which is associated with reaching a predetermined or predeterminable energy level of the detected energy stored in one of the resonant
  • first resonant circuit of the two coupled resonant circuits of Hochfrequenzzünd takes place in a conventional manner, as usual in electrical resonant circuits, a periodic exchange of electrical energy between an encompassed by the generator coil or inductor on the one hand and also from the generator included capacitor on the other hand.
  • a periodic exchange of electrical energy between an encompassed by the generator coil or inductor on the one hand and also from the generator included capacitor on the other hand can be determined by the detection in one of the resonant circuits, in particular in the resonator to certain Time energy stored achieve the desired adaptation to environmental and operational influences.
  • the resonance frequency of the resonator can be detected by detecting the energy stored in the resonator, so that activation of the switching element for excitation of the generator is always possible with the resonance frequency or at least one excitation frequency in the vicinity of the resonant frequency of the resonator.
  • This aims at a compensation in particular of the temperature dependence of the resonance frequency the high-frequency ignition device, in particular of the resonator, so that with the temperature dependence a decisive environmental or operational influence is manageable.
  • an adaptation of the resonance frequency to production-specific tolerances of the involved components is possible.
  • energy stored in one of the resonant circuits is detected by the energy stored in the resonator.
  • a voltage increase for example, reaches the two or three times the applied operating voltage.
  • there is an increase in voltage which can easily reach 200 times the voltage injected by the generator into the resonator.
  • the stored energy in the resonator at certain times is therefore greater by orders of magnitude compared to the generator. Accordingly, a sensory detection of the energy stored in one of the resonant circuits is particularly simple if the resonator is considered for this purpose.
  • a magnetic field of the inductance encompassed by the resonator which is referred to below as a resonator inductance for the purpose of discrimination, is preferably detected.
  • the periodically between the capacitor and inductance exchanged electrical energy in a resonant circuit alternately leads to a high current (through the inductance) or a high voltage (across the capacitor).
  • the current through an inductance or the resulting magnetic field of the inductance, ie the generator inductance can be measured particularly easily.
  • the control of the switching element takes place according to a preferred embodiment with an excitation frequency, which is associated with reaching a predetermined or predeterminable energy level of Resonatorinduktterrorism.
  • an excitation frequency which is associated with reaching a predetermined or predeterminable energy level of Resonatorinduktterrorism.
  • an energy maximum is applied as the predetermined or specifiable energy level of the resonator inductance. Then, an excitation of the resonator to electrical vibrations is possible in such a way that adjusts a maximum voltage increase in the resonator, wherein the energy of the maximum voltage increase in a favorable manner for generating an ignition voltage sufficient in the resonator and for bridging an ignition distance covered by the resonator.
  • the high-frequency ignition device is excited during individual or all ignition processes or between successive ignition processes with different, predetermined or predefinable frequencies.
  • the frequencies are selected so that the predetermined or predeterminable energy level or the energy maximum, hereinafter referred to collectively under the term energy maximum, is detected. This is possible because, due to a familiarity with the specification of the components encompassed by the high-frequency ignition device, ie inductances and capacitances, there is at least one theoretical value or an estimated value with regard to the resonance frequency. Accordingly, the frequencies provided for the excitation can be preset in the range of this theoretical value or this estimated value.
  • an heuristic search ie the approach of a strategy which accelerates the finding of solutions, is particularly efficient here for an acceleration of the search of the given or specifiable energy level or of the energy maximum.
  • a method is used in which starting from a first, second and third frequency f 1 , f 2 , f 3 , the stored in the generator Energy is detected, wherein start values for the first and third frequencies f 1 , f 3 are selected so that they include a sought optimal excitation frequency, which is associated with reaching a predetermined or predeterminable energy level, in particular the energy maximum, the generator capacity, wherein an iterative process, the values for the first, second and third frequencies f 1 , f 2 , f 3 are modified with respect to a continuous approximation to the sought optimum excitation frequency.
  • the search space is thus already considerably limited in this way.
  • the values for the first, second and third frequencies f 1 , f 2 , f 3 are modified with respect to a continuous approximation to the sought optimum excitation frequency, so that with each iteration step the search space is reduced again, eg halved.
  • the sought optimal excitation frequency can be found in finite time with comparatively little mathematical effort.
  • Advantage of this approach is that the sought optimal excitation frequency is always found, the
  • Algorithm always converges. Another advantage is that the maximum time that is determined for finding the desired optimal excitation frequency, because the method according to the advantageous embodiment of the invention in the approach known from the so-called binary search (Binary Search) belongs to the complexity class log n and converges after a maximum of log 2 n steps, which also applies to the approach proposed here.
  • Binary Search Binary Search
  • Simple and favorable conditions for the implementation of the method in a computer-implemented or computer-implemented software algorithm result if the values for the first, second and third frequencies f 1 , f 2 , f 3 are equidistant at least at the start time, in particular remain equidistant during the entire iterative process.
  • the invention also relates to such a computer program or a computer program product with such a computer program.
  • a computer program product in particular, a storage medium, such as e.g. a memory module, as it may be included by a central control unit of an engine electronics for controlling an internal combustion engine and the like, into consideration.
  • the computer program is executed by a dedicated processing unit such as a processor or the like.
  • ASIC user-specific integrated shading
  • DSP digital signal processor
  • Such components function in terms of each realized functionality as a memory module.
  • the present in the memory module in the broadest sense as software implementation of the method is present in the ASIC or DSP as so-called firmware.
  • firmware The peculiarity of such computer program products is that they virtually take over the execution of the stored functionality in the manner of a processor, in the DSP even in parallel processing.
  • the invention further relates to a high-frequency ignition device, which is provided for the execution of and for use with the method outlined above and further described below, and is prepared.
  • the high-frequency ignition device is intended in particular for use with or for use with an internal combustion engine, such as a gasoline engine, and comprises two coupled electrical oscillating circuits, the first oscillating circuit of the two coupled oscillating circuits designated as a generator for generating a voltage increase and for coupling it, in particular to the line-connected one Coupling, is provided in the designated as a resonator second resonant circuit of the two coupled resonant circuits, the generator to a source, such as an electrical system of the internal combustion engine motor vehicle, connected and via an electrical switching element, in particular a circuit breaker, according to a control of the switching element excitable is, wherein a stored in one of the resonant circuits, in particular in the resonator, recorded energy by means of a coupling element acting as a sensor and a sensor signal as a measure
  • the sensor signal is a measure of the energy stored in the high-frequency ignition device, in particular in the resonator.
  • the excitation frequency is thus directly dependent on the energy actually stored.
  • the stored energy is detected by means of the sensor and evaluated for driving the switching element by the control electronics based on the sensor signal, the excitation frequency is generated, with which the switching element is acted upon and thus finally fed to the generator according to the excitation frequency from the source becomes.
  • a conductor end of the resonator inductance functioning as a coupling element can be suitably associated with respect to spatial proximity and orientation and used as a sensor, ie as a magnetic field sensor, after the magnetic fields generated by the resonator inductance are readily sufficient, in the conductor end a current flow which can be evaluated as a sensor signal induce.
  • Fig. 1 shows a schematically simplified representation of a basically known Hochfrequenzzünd raised 10. This includes a generator 12 and a resonator coupled thereto 14, and as an example of a switching element, a circuit breaker 16 and possibly a non-illustrated voltage transformer comprehensive current or voltage source, hereinafter briefly as Designated source 18.
  • generator 12 and resonator 14 are coupled oscillating circuits.
  • generator 12 comprises at least one coil designated as generator inductor 20 and a capacitor designated as generator capacitor 22.
  • generator inductance 20 and generator capacitance 22 are shown as constituents of a series resonant circuit, which is otherwise not shown.
  • the resonator 14 comprises a coil designated as a resonator inductor 24 for distinguishing it from the generator inductor 20 and an ignition path 25, e.g. a known spark plug with ignition electrodes.
  • a coupling for example the coupling of generator 12 and resonator 14, is used here and below, this means every possible type of coupling, for example an inductive or capacitive coupling, in particular but a wired coupling.
  • the double arrows in Fig. 1 (but also in the below Fig. 2 ) represent such couplings schematically simplified graphically.
  • the power switch 16 e.g. in an embodiment as a power MOSFET transistor 26, provided.
  • source 18 e.g. the on-board network of a motor vehicle, in particular a motor vehicle battery and / or a KrattGermanmaschine 28, fed.
  • the generator inductance 20 is supplied on one side with the voltage of the electrical system and a triggering of the power switch 16 short-circuits the generator capacitance 22, that is to say the capacitance of the MOSFET transistor 26 , causes.
  • the control of the circuit breaker 16 by means of an electronic control unit 30. This is by periodic control of the circuit breaker 16, a frequency at which the generator 12 is excited from the source 18 before.
  • Fig. 2 shows a schematically simplified representation of a high-frequency ignition device 10 according to the invention, this corresponds in detail to the in Fig. 1 shown high-frequency ignition device 10, so that reference is made to the description there.
  • the high-frequency ignition device 10 in Fig. 2 is one of the resonant circuits, in the illustrated embodiment the resonator 14, more precisely the Resonatorinduktterrorism 24, acting as a sensor 32 coupling element, such as a conductor end assigned, which functions in the illustrated situation as a magnetic field sensor by the magnetic field of Resonatorindukttechnik 24 a induced as sensor signal 34 evaluable current in the conductor end.
  • the energy stored in one of the resonant circuits, ie generator 12 or resonator 14, is detected with the sensor 32.
  • a sensory detection of, for example, the energy stored in the generator inductance 20 comes into consideration (not shown).
  • the stored energy in the resonator 14 is evaluated for driving the circuit breaker 16.
  • a sensor signal 34 emitted by the sensor 32 and evaluatable by the control electronics 30 is a measure of the total energy stored in the high-frequency ignition device, in particular in the resonator 14.
  • the control electronics 30 To excite the generator 12, the control electronics 30 generates an excitation frequency 36, with which the power switch 16 is acted upon.
  • the excitation frequency 36 is now changed so that the stored energy in the generator 12 and thus, due to a suitable vote of each involved components, ie capacitances and inductances, and the energy stored in the resonator 14 is maximum.
  • the excitation frequency 36 is determined, which leads to a maximum voltage increase in the resonator 14 and thus to particularly favorable conditions for the ignition.
  • Voltage overshoot is known to occur in an electrical resonant circuit when the voltage across the coil or capacitor reaches a value that significantly exceeds the value of the total voltage.
  • the generator 12 is excited with three frequencies, in particular with three equidistant frequencies, f 1 , f 2 and f 3 , where f 1 ⁇ f 2 ⁇ f 3 .
  • the values of the sensor signal 34 associated with the frequencies f 1 , f 2 , f 3 are referred to hereinafter as FB 1 , FB 2 and FB 3 , where FB stands for "feedback".
  • f 1 and f 3 are chosen such that they include an optimum excitation frequency with which the sought energy maximum is reached, this optimum excitation frequency can be determined.
  • FIG. 3 a possible course of the electrical energy stored in the RF generator 12 as a function of ablated on the abscissa different excitation frequencies 36.
  • the Generator 12 sequentially excited with three different frequencies f 1 , f 2 , f 3 and the resulting system responses FB 1 , FB 2 , FB 3 evaluated. It is important that f 1 , f 2 , f 3 are chosen so that the sought optimal excitation frequency of the frequencies f 1 and f 3 is included.
  • the method for finding the optimum excitation frequency which is preferred according to a particular aspect of the invention, is based on the algorithm known in the state of the art as binary search or "binary search", for which convergence is detected after log 2 N steps, the termination criterion for the above-described iterative method is given a maximum number of iteration steps.
  • the excitation frequency found after processing the predetermined or predefinable number of iteration steps is then used as the sought optimal excitation frequency.
  • the sought optimal excitation frequency was found in this way, this can be used as the excitation frequency 36 for exciting the generator 12.
  • bandwidth Number of iterations Total computing time 100 kHz 11 244 ⁇ s 50 kHz 10 222 ⁇ s 25 kHz 9 200 ⁇ s 1 kHz 4 89 ⁇ s
  • the number of iterations can be entered at which the algorithm is guaranteed to converge under the respective boundary conditions.
  • a slightly reduced number of iteration steps may be provided, because this still leads to a sufficiently accurate approximation of the sought optimal excitation frequency with a linear reduced total computing time.
  • the control electronics 30 With the determination of the desired optimal excitation frequency by the control electronics 30 and with their subsequent use as the excitation frequency 36 for the generator 12 results in an automatic adjustment of the excitation frequency 36 to the resonant situation of the resonator 12 and / or the resonance situation of the coupled resonant circuits Generator 12 and resonator 14. Environmental and operating influences such as pressure, temperature, etc. are compensated.
  • Fig. 4 shows one compared to Fig. 3 detailed form of a possible realization of the high-frequency ignition device.
  • the first resonant circuit or generator 12 is a so-called class E amplifier, wherein the capacity of the acting as a circuit breaker MOSFET transistor 26 is used as the generator capacitance 22.
  • the generator inductance 20 is connected to the vehicle electrical system voltage U B of the motor vehicle. Via a center tap between the generator capacitance 22 and generator inductance 20, a point at which, for example, 2 ⁇ U B can be tapped in the case of resonance of the generator 12, the voltage increase generated in the generator 12 is coupled into the resonator 14.
  • the coupling takes place according to the illustrated embodiment on a wired path, where appropriate, a known per se impedance detection, a so-called "match box" 38 is interposed.
  • parasitic capacitances that is, capacitances
  • capacitances can be represented as capacitors of each winding of the resonator inductance 24 to ground are, not avoid. These capacitances actually supplement the resonator to form an electrical resonant circuit.
  • a method for operating a high-frequency ignition device and such a high-frequency ignition device are specified, which are used as generator 12 and resonator 14 comprise two coupled electrical resonant circuits, of which the generator is fed via an electrical switching element and excited in accordance with a control of the switching element, is provided in which or in the compensation of Betrlebs- and / or environmental influences that stored in the generator 12 energy detected and evaluated for driving the switching element.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP07012991A 2007-07-03 2007-07-03 Dispositif d'allumage à haute fréquence et son procédé de fonctionnement Withdrawn EP2012004A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07012991A EP2012004A1 (fr) 2007-07-03 2007-07-03 Dispositif d'allumage à haute fréquence et son procédé de fonctionnement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07012991A EP2012004A1 (fr) 2007-07-03 2007-07-03 Dispositif d'allumage à haute fréquence et son procédé de fonctionnement

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EP2012004A1 true EP2012004A1 (fr) 2009-01-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011100516A3 (fr) * 2010-02-12 2011-11-17 Federal-Mogul Ignition Company Formation d'arc intentionnelle d'un allumeur à effet couronne
WO2012103112A3 (fr) * 2011-01-24 2012-12-20 Goji Ltd. Application d'énergie électromagnétique pour moteurs à combustion interne
DE102013111062A1 (de) * 2013-10-07 2015-04-09 Borgwarner Ludwigsburg Gmbh Verfahren zum Einstellen einer Anregungsfrequenz eines Schwingkreises einer Koronazündeinrichtung
EP2950621A4 (fr) * 2013-01-22 2017-01-25 Imagineering, Inc. Dispositif de génération de plasma et moteur à combustion interne

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211133B1 (fr) 1985-07-27 1990-05-02 Bernd Holz Méthode et dispositif pour transférer de l'énergie thermique dans un espace rempli par une matière
US5179928A (en) * 1989-07-13 1993-01-19 Siemens Aktiengesellschaft Internal combustion engine ignition device
EP0763759A2 (fr) * 1995-09-14 1997-03-19 Sumitomo Electric Industries, Inc. Méthode et appareil de décharge électrique
WO2003046374A1 (fr) 2001-11-21 2003-06-05 Robert Bosch Gmbh Allumage haute frequence conçu pour un moteur a combustion interne
US20040129241A1 (en) 2003-01-06 2004-07-08 Freen Paul Douglas System and method for generating and sustaining a corona electric discharge for igniting a combustible gaseous mixture
DE102005036968A1 (de) * 2005-08-05 2007-02-15 Siemens Ag Plasma-Zündsystem und Verfahren zu dessen Betrieb
FR2895169A1 (fr) 2005-12-15 2007-06-22 Renault Sas Optimisation de la frequence d'excitation d'un resonateur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211133B1 (fr) 1985-07-27 1990-05-02 Bernd Holz Méthode et dispositif pour transférer de l'énergie thermique dans un espace rempli par une matière
US5179928A (en) * 1989-07-13 1993-01-19 Siemens Aktiengesellschaft Internal combustion engine ignition device
EP0763759A2 (fr) * 1995-09-14 1997-03-19 Sumitomo Electric Industries, Inc. Méthode et appareil de décharge électrique
WO2003046374A1 (fr) 2001-11-21 2003-06-05 Robert Bosch Gmbh Allumage haute frequence conçu pour un moteur a combustion interne
US20040129241A1 (en) 2003-01-06 2004-07-08 Freen Paul Douglas System and method for generating and sustaining a corona electric discharge for igniting a combustible gaseous mixture
DE102005036968A1 (de) * 2005-08-05 2007-02-15 Siemens Ag Plasma-Zündsystem und Verfahren zu dessen Betrieb
FR2895169A1 (fr) 2005-12-15 2007-06-22 Renault Sas Optimisation de la frequence d'excitation d'un resonateur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011100516A3 (fr) * 2010-02-12 2011-11-17 Federal-Mogul Ignition Company Formation d'arc intentionnelle d'un allumeur à effet couronne
CN102844562A (zh) * 2010-02-12 2012-12-26 费德罗-莫格尔点火公司 电晕点火器的有意电弧作用
WO2012103112A3 (fr) * 2011-01-24 2012-12-20 Goji Ltd. Application d'énergie électromagnétique pour moteurs à combustion interne
CN103384755A (zh) * 2011-01-24 2013-11-06 高知有限公司 用于燃烧发动机的em能量施加
EP2950621A4 (fr) * 2013-01-22 2017-01-25 Imagineering, Inc. Dispositif de génération de plasma et moteur à combustion interne
DE102013111062A1 (de) * 2013-10-07 2015-04-09 Borgwarner Ludwigsburg Gmbh Verfahren zum Einstellen einer Anregungsfrequenz eines Schwingkreises einer Koronazündeinrichtung
US9294102B2 (en) 2013-10-07 2016-03-22 Borgwarner Ludwigsburg Gmbh Method for adjusting an excitation frequency of an oscillating circuit of a corona ignition device
DE102013111062B4 (de) * 2013-10-07 2017-03-16 Borgwarner Ludwigsburg Gmbh Verfahren zum Einstellen einer Anregungsfrequenz eines Schwingkreises einer Koronazündeinrichtung

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