EP1979608A1 - Anordnung zum hochspannungsseitigen erfassen eines messsignals, insbesondere eines dem ionenstrom zwischen den elektroden einer zündkerze einer brennkraftmaschine entsprechenden signals - Google Patents
Anordnung zum hochspannungsseitigen erfassen eines messsignals, insbesondere eines dem ionenstrom zwischen den elektroden einer zündkerze einer brennkraftmaschine entsprechenden signalsInfo
- Publication number
- EP1979608A1 EP1979608A1 EP06793455A EP06793455A EP1979608A1 EP 1979608 A1 EP1979608 A1 EP 1979608A1 EP 06793455 A EP06793455 A EP 06793455A EP 06793455 A EP06793455 A EP 06793455A EP 1979608 A1 EP1979608 A1 EP 1979608A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resistor
- arrangement according
- secondary winding
- spark plug
- current path
- 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.)
- Granted
Links
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
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
-
- 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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Definitions
- the invention relates to an arrangement for high-voltage side detection of a broadband measurement signal, in particular a signal corresponding to the ion current between the electrodes of a spark plug of an internal combustion engine.
- the arrangement has at least one first current path, in which at least the secondary winding of the ignition transformer is arranged, and a second current path, in which at least the spark gap formed by at least two electrodes of a spark plug is arranged.
- the combustion process of a gasoline-air mixture in internal combustion engines is initiated by a spark generated by a high voltage applied between two electrodes of a spark plug.
- a spark generated by a high voltage applied between two electrodes of a spark plug.
- a breakdown voltage is between the Electrodes generated as a result of an arc discharge an arc, which is also referred to as a spark.
- arc discharge by the resulting during the discharge of UV radiation and by the combustion process of the gasoline-air mixture, a chemical and thermal ionization, and it will be generated in the combustion chamber charge carriers, which even after the arc in the area between the electrodes Spark plug are available.
- the number and distribution of these charge carriers is particularly dependent on the internal pressure in the cylinder and the combustion process itself.
- radicals are atoms and molecules with at least one unpaired electron, most of which have high reactivity. Due to this reactivity, radicals usually only exist for a very short time.
- the reaction sequence can be measured as a current flow. This reaction process is very fast.
- the ion current generated between the electrodes contains high frequency components.
- a broadband measurement signal must be determined.
- the evaluation circuit is arranged in series with the secondary coil, whereby the secondary coil acts as a low-pass filter. As a result, not all frequency components of the ion current can be determined and evaluated. Furthermore, in known systems, the measurement circuit affects the available spark energy.
- the object of the invention is to provide an arrangement in which a broadband measurement signal determined in a simple manner on the high voltage side and in which the energy available for generating the arc energy is not or only slightly reduced.
- the arrangement with the features of claim 1 ensures that the electrodes of the spark plug a relatively large amount of energy can be supplied to generate the arc and at the same time to measure ion currents and other high-frequency signal components precise high-voltage side.
- An irregular fuel combustion in internal combustion engines which is also referred to as knock, can be reliably detected by this arrangement in the entire speed-load range of an internal combustion engine, since the available measurement bandwidth is certainly greater than the acoustic resonance frequency of the combustion chamber.
- knock can be reliably detected by this arrangement in the entire speed-load range of an internal combustion engine, since the available measurement bandwidth is certainly greater than the acoustic resonance frequency of the combustion chamber.
- the measuring voltage is provided, for example, by means of a capacitor which is charged by the high voltage generated by means of the ignition transformer, only relatively little energy is withdrawn for generating the measuring voltage.
- a diode which is used in known circuit arrangements and serves to suppress the switch-on pulse is preferably used. In the suppression of the switch-on pulse, a secondary-side high voltage is prevented as a result of the primary-side connection of the supply voltage.
- a second aspect of the invention relates to a further arrangement for high-voltage side detection of a broadband measurement signal, in particular a signal corresponding to the Sonenstrom between the electrodes of a spark plug of an internal combustion engine.
- the arrangement has three parallel current paths, wherein at least the secondary winding of an ignition transformer and in the second current path at least the spark gap formed by at least two electrodes of the spark plug are arranged in the first current path.
- In the third current path at least one measuring resistor is arranged. At least in a range between the connection of the secondary winding and the measuring resistor is used - A -
- At least a portion of a transformer core of the ignition transformer as an electrical conductor.
- Fig. 1 is a circuit diagram of a known circuit arrangement for detecting an ion current between the electrodes of a spark plug of an internal combustion engine
- FIG. 2 shows the circuit diagram of a circuit arrangement for detecting a broadband measurement signal according to a first embodiment of the invention
- FIG. 3 shows a circuit diagram of a circuit arrangement for detecting a broadband measurement signal according to a second embodiment of the invention.
- 4 shows a further circuit diagram of a circuit arrangement for detecting a measurement signal.
- Fig. 1 is a circuit diagram of a known circuit arrangement for generating a Züllingtbogens, the so-called spark, using a spark plug 10 is shown.
- the high voltage required to generate the arc is generated by means of a transformer 20.
- the transformer 20 has a primary winding 12 and a secondary winding 14, which are magnetically coupled together via an iron core 13.
- One terminal of the primary winding 12 is permanently connected to the positive pole of the battery voltage Ubatt of a battery 16 of a motor vehicle.
- the negative pole of the battery 16 is connected to the ground of the motor vehicle, which serves as a reference potential.
- An electronic control unit 18 generates drive pulses for driving a power output stage formed by an IGBT power transistor and supplies these control pulses as a drive signal to a control terminal (gate) of the IGBT power transistor via a series resistor Rz.
- the IGBT power transistor connects the second terminal of the primary winding 12 to the ground.
- a first terminal of the secondary winding 14 is connected to the high voltage electrode of the spark plug 10.
- Another electrode of the spark plug 10 is connected to the vehicle ground.
- the two electrodes are arranged at a distance from each other and form a spark gap over which an arc is generated with the aid of the high voltage generated by the ignition transformer 20.
- the second terminal of the secondary winding 14 is connected to a measuring circuit 22, which contains a power source 24 and a measuring resistor Rm.
- the energy source 24 comprises a capacitor C1 and a varistor ZPD arranged parallel to the capacitor C1.
- the power source 24, the measuring resistor Rm, the secondary winding 14 and the spark gap of the spark plug 10 are connected in series and form a closed circuit via the vehicle ground.
- the control unit 18 generates a drive signal, by means of which the IGBT power transistor grounds the second terminal of the primary winding 12. binds, so that a closed circuit is formed, through which the battery voltage Ubatt is applied to the primary winding 12. As a result, a primary current flows through the primary winding 12. This primary current generates a magnetic field, by which a magnetic flux is generated. When the magnetic field builds up after the primary current flows, the magnetic flux caused by the magnetic field changes. The change in the magnetic flux induces a voltage in the secondary winding 14. This induced voltage is applied to the electrodes of the spark plug 10. If the induced voltage is small enough, ie, as long as the induced voltage has not reached the required breakdown voltage of the spark plug 10, no spark is generated. By the inserted diode D1, however, prevents the voltage induced in the secondary winding 14 at all applied to the electrodes of the spark plug 10, whereby a spark when switching on the primary winding 12 regardless of the height of the induced voltage is reliably prevented.
- the controller 18 drives the IGBT power transistor to disconnect the ground and primary winding 12. Due to the separation, the primary current flowing through the primary winding 12 is interrupted abruptly, whereby the magnetic field caused by the primary current collapses. The magnetic flux in the magnetic circuit of the ignition transformer 20 is thereby rapidly changed relatively strong. This change in the magnetic flux causes the induction of a high voltage in the secondary winding 14, whereby the voltage applied between the electrodes of the spark plug 10 exceeds the breakdown voltage of the spark plug 10 and causes a high voltage discharge.
- the voltage drop across the varistor ZPD determines the charging voltage of the capacitor C1. Furthermore, the measuring resistor Rm and the varistor ZPD affect the current flow in the secondary circuit during the application of the high voltage, whereby the energy available for generating the arc in the secondary circuit is considerably reduced.
- the power source 24 feeds the secondary circuit, whereby a current flows through the secondary winding 14 via the electrodes of the spark plug 10, the ground connection of the motor vehicle and the measuring resistor Rm.
- the voltage drop generated thereby via the measuring resistor Rm an ion current present between the electrodes of the spark plug 10 can be detected.
- the secondary circuit serves as a measuring circuit.
- the secondary winding 14 of the transformer 20 is arranged in series with the measuring resistor Rm and the spark gap of the spark plug 10. Due to the inductance of the secondary winding 14, short-term, ie relatively high-frequency, fluctuations of the charge carriers present between the electrodes of the spark plug 10, in particular of the ion current, do not become effective at the measuring resistor Rm.
- the secondary winding 14 thus serves as a low-pass filter, whereby only a relatively narrow-band signal of the ion current between the electrodes of the spark plug 10 is available. The signal thus reflects only low-frequency changes in the ion current.
- FIG. 2 shows a circuit diagram of a circuit arrangement according to a first embodiment of the invention. Like elements have the same reference numerals.
- the primary-side sonication of the transformer 20 is consistent with the circuit shown in Fig. 1.
- the secondary circuit ie the high-voltage circuit, has three parallel current paths, the secondary winding 14 of the transformer 20 being arranged in the first current path, and the energy source 24 and the spark gap formed by the electrodes of the spark plug 10 being arranged in the second current path.
- a voltage divider formed from three resistors RI, R2 and Rm is arranged.
- the iron core 13 of the ignition transformer 20 is used as an electrical conductor for connecting the resistors R1 and R2.
- the iron core 13 thus forms a portion of the third current path.
- a diode D1 is arranged in series with the secondary winding 14, which prevents a current flow through the turn-on pulse already described in connection with FIG. Furthermore, the diode D1 prevents current flow through the first path when a measurement voltage is applied in a spark gap formed by the spark plug 10 electrodes and the voltage divider formed from the resistors R1, R2 and Rm with the aid of the power source 24.
- the measuring circuit is thus decoupled from the secondary winding 14 with the aid of the diode D1, so that the secondary winding 14, unlike the circuit arrangement shown in FIG. 1, does not act as a low-pass filter.
- the voltage divider formed by the resistor R1 and the total resistance of the resistors R2 and Rm sets the potential of the iron core 13 of the transformer 20 during the application of the high voltage in the secondary circuit.
- the sum of the resistors R1, R2 and Rm should be> 1 megohm to reduce the current flow across this third current path, thus providing the spark plug 10 with sufficient energy to generate the arc.
- the resistance value of the sum of the resistors R1, R2 and Rm is preferably in the range between 10 and 100 megohms, whereby the resistance value of the resistor R1 can also be 0 ohms, as explained below in connection with FIG.
- the potential of the iron core 13 can be easily adjusted.
- the resistors R1 and the total resistance of the resistors R2 and Rm can be made the same size, so that the iron core 13 has approximately a high voltage potential, which corresponds to a floating core in the prior art.
- FIG. 3 shows a circuit arrangement according to a second embodiment of the invention, which is similar to the circuit arrangement according to FIG. 2.
- the resistor R1 is omitted in the circuit arrangement according to FIG. 3, so that the iron core 13 essentially has the high-voltage potential generated by the secondary winding 14.
- the iron core 13 has a potential during an ignition process, which is compared to the high voltage potential of the secondary winding 14 by the voltage drop of the diode D1, that is reduced by 0.7 volts. During the measuring process, ie following the ignition process, the iron core 13 then has the potential of the measurement voltage generated by the energy source 24. As already mentioned, the turn-on pulse is blocked by the diode D1 in the secondary circuit, so that the voltage generated by the turn-on pulse in the secondary coil 14 is not applied to the iron core 13 of the transformer 20.
- the diode D1 serves as a decoupling means for decoupling of the spark plug 10 voltage source 24, and the resistors R2 and Rm or R1, R2 and Rm existing measuring circuit of the secondary winding 14 during a caused by the voltage source 24 current flow in the measuring circuit.
- the diode D1 is thus prevented that when feeding the measuring circuit with the measuring voltage, a current flows through the secondary winding 14.
- the measuring signal is preferably conducted via a path parallel to the secondary winding 14.
- the resistance values of the voltage divider formed from the resistors R1 and the total resistance from the resistors R2 and Rm should be chosen so large that the capacitive coupling of the iron core 13 is maintained.
- a resistive bobbin or a coating of the iron core 13 or a portion of the iron core 13 may also be provided with a resistor material; with a resistive coating, whereby further constructive advantages are achieved.
- ignition transformers 20 With the aid of the circuit arrangements illustrated in FIGS. 2 and 3, it is possible to use ignition transformers 20 with spark energies of> 35 nm, and nevertheless to carry high-frequency ion currents and other high-frequency signal components. on the measuring side.
- a knock detection in the occurrence of explosive burns, which is too fast for the mechanical movement of the piston, can be determined automatically with the aid of the circuit arrangements according to the invention with conventional ignition transformers, in particular with Stabzündtransformatoren. Even with these conventional ignition transformers, despite the measuring circuit, sufficient spark energy is provided over the entire speed-load range of the internal combustion engine. To generate the measuring voltage with the aid of the energy source 24, only relatively little energy is withdrawn from the secondary circuit for charging the capacitor C1 of the energy source 24.
- the secondary-side high voltage is measured in the third branch directly via the ohmic voltage divider R1, R2, Rm or R2, Rm.
- the inductance of the secondary coil 14 is not in the measuring branch and thereby does not act as a low-pass filter.
- the measurable frequency components of the spark plug voltage which can be detected by means of the voltage drop across the measuring resistor Rm, are limited only by the capacitive coupling of the iron core 13 of the ignition transformer 20 and by the resistors of the voltage divider R1, R2, Rm and R2, Rm.
- the bandwidth of the measured signal is essentially limited only by the capacitive coupling of the iron core 13 of the ignition transformer 20 and by the resistors of the voltage divider R1, R2, Rm and R2, Rm,
- FIGS. 2 and 3 serve as measuring circuits, by means of which the characteristics of the spark plug voltage applied between the electrodes of the spark plug 10 are precisely detected. Thereby, both the burning time, the burning voltage, the breakdown voltage and the rise of the candle voltage before the flashover, i. before the arc, between the electrodes of the spark plug 10 are detected exactly.
- FIG. 4 shows a circuit diagram of a further embodiment of a control of an evaluation circuit.
- a varistor VAR1 is arranged in the first current path, which has an associated varistor VAR1. causes additional voltage drop in the first current path. This voltage drop then causes a reduction of the spark plug 10 available ignition energy.
- the measurement signal via the measuring resistor Rm or the high-voltage potential applied to the varistor VDR1, in particular in the case of rod transformers, must be guided in a relatively complex manner to a field of interference of the bar transformer.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510043318 DE102005043318A1 (de) | 2005-09-12 | 2005-09-12 | Anordnung zum hochspannungsseitigen Erfassen eines Messsignals, insbesondere eines dem Ionenstrom zwischen den Elektroden einer Zündkerze einer Brennkraftmaschine entsprechenden Signals |
PCT/EP2006/066284 WO2007031521A1 (de) | 2005-09-12 | 2006-09-12 | Anordnung zum hochspannungsseitigen erfassen eines messsignals, insbesondere eines dem ionenstrom zwischen den elektroden einer zündkerze einer brennkraftmaschine entsprechenden signals |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1979608A1 true EP1979608A1 (de) | 2008-10-15 |
EP1979608B1 EP1979608B1 (de) | 2013-12-25 |
EP1979608B8 EP1979608B8 (de) | 2014-02-26 |
Family
ID=37622028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06793455.4A Not-in-force EP1979608B8 (de) | 2005-09-12 | 2006-09-12 | Anordnung zum hochspannungsseitigen erfassen eines messsignals, insbesondere eines dem ionenstrom zwischen den elektroden einer zündkerze einer brennkraftmaschine entsprechenden signals |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1979608B8 (de) |
JP (1) | JP4672773B2 (de) |
CN (1) | CN101263299B (de) |
DE (1) | DE102005043318A1 (de) |
WO (1) | WO2007031521A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006010807B4 (de) * | 2006-03-07 | 2015-06-25 | Volkswagen Aktiengesellschaft | Schaltung zum Erfassen verbrennungsrelevanter Größen |
CN106920661B (zh) * | 2017-02-14 | 2019-02-01 | 许继集团有限公司 | 一种电力电子变压器 |
IT201900002517A1 (it) * | 2019-02-21 | 2020-08-21 | Eldor Corp Spa | Dispositivo elettronico per il controllo di una bobina di accensione di un motore a combustione interna e relativo sistema di accensione elettronica per rilevare una pre-accensione nel motore a combustione interna |
CN111064355B (zh) * | 2019-11-22 | 2023-11-17 | 西安许继电力电子技术有限公司 | 一种悬浮电位消除电路 |
CN115360587B (zh) * | 2022-09-16 | 2024-02-06 | 湖南泫坤量化科技有限公司 | 一种电火花能量测量方法、装置及系统 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2347682A1 (fr) * | 1977-04-19 | 1977-11-04 | Bicosa Recherches | Dispositif detecteur a eclateur |
US5272914A (en) * | 1990-10-04 | 1993-12-28 | Mitsubishi Denki K.K. | Ignition system for internal combustion engines |
JP2951780B2 (ja) * | 1991-12-09 | 1999-09-20 | 三菱電機株式会社 | 内燃機関の燃焼検出装置 |
JP3192541B2 (ja) * | 1994-01-28 | 2001-07-30 | 三菱電機株式会社 | 内燃機関用失火検出回路 |
JPH09137769A (ja) * | 1995-11-14 | 1997-05-27 | Denso Corp | 内燃機関の燃焼状態検出装置 |
FR2742486B1 (fr) * | 1995-12-15 | 1998-01-23 | Renault | Dispositif de surveillance du systeme d'allumage d'un moteur a combustion interne |
JP3472661B2 (ja) * | 1996-03-28 | 2003-12-02 | 三菱電機株式会社 | 内燃機関用イオン電流検出装置 |
FR2753234B1 (fr) * | 1996-09-11 | 1998-12-04 | Electricfil | Procede pour detecter la phase d'allumage d'un cylindre d'un moteur a combustion interne a allumage commande, afin de permettre notamment l'initialisation de la sequence d'injection |
JP3554447B2 (ja) * | 1996-09-19 | 2004-08-18 | トヨタ自動車株式会社 | 内燃機関のノッキング検出装置 |
JP2000003777A (ja) * | 1998-06-12 | 2000-01-07 | Ngk Spark Plug Co Ltd | 点火プラグおよび点火プラグ組立体 |
JP2000073927A (ja) * | 1998-08-27 | 2000-03-07 | Toyota Motor Corp | 内燃機関の燃焼状態検出装置 |
-
2005
- 2005-09-12 DE DE200510043318 patent/DE102005043318A1/de not_active Withdrawn
-
2006
- 2006-09-12 EP EP06793455.4A patent/EP1979608B8/de not_active Not-in-force
- 2006-09-12 JP JP2008530508A patent/JP4672773B2/ja not_active Expired - Fee Related
- 2006-09-12 CN CN2006800334769A patent/CN101263299B/zh not_active Expired - Fee Related
- 2006-09-12 WO PCT/EP2006/066284 patent/WO2007031521A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007031521A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2009508131A (ja) | 2009-02-26 |
DE102005043318A1 (de) | 2007-03-22 |
EP1979608B8 (de) | 2014-02-26 |
CN101263299B (zh) | 2010-06-23 |
CN101263299A (zh) | 2008-09-10 |
WO2007031521A1 (de) | 2007-03-22 |
JP4672773B2 (ja) | 2011-04-20 |
EP1979608B1 (de) | 2013-12-25 |
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