EP1238195B1 - Steuerbare zündschaltung - Google Patents
Steuerbare zündschaltung Download PDFInfo
- Publication number
- EP1238195B1 EP1238195B1 EP00984610A EP00984610A EP1238195B1 EP 1238195 B1 EP1238195 B1 EP 1238195B1 EP 00984610 A EP00984610 A EP 00984610A EP 00984610 A EP00984610 A EP 00984610A EP 1238195 B1 EP1238195 B1 EP 1238195B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- voltage
- spark
- circuit
- ignition coil
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 4
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- 238000010304 firing Methods 0.000 description 5
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- 230000006835 compression Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 206010038743 Restlessness Diseases 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
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
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
- F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
Definitions
- the invention relates to an ignition circuit according to the Preamble of claim 1.
- ignition circuits In known such ignition circuits is a electronic switch connected in parallel with the capacitor and is triggered by a single pulse of the pulse generator driven. When switching on the electronic switch it comes to a short circuit capacitor and thereby a rapid breakdown of the voltage across the capacitor, causing a rapid increase in the flow of current over the Primary winding of trained as Spartrafo ignition coil comes. This causes a single ignition voltage pulse at the Secondary side of the ignition coil, which ignites a spark between the two electrodes of a spark plug should.
- the ignition voltage is sufficient due to the pressure and / or the wear of the spark plug not for training of a spark, so flows after interrupting the electronic switch the stored energy in the Capacitor. The next time the switch is turned on This process is repeated, but it is practically too no increase in the ignition voltage. Is the ignition voltage just at the for a spark of a spark at each given state of the electrodes of the spark plug and the provided pressures in the combustion chamber of the internal combustion engine, so it comes because of the fluctuations of the pressure and the Supply voltage to an irregular ignition and thus too a restless running of the internal combustion engine and thus a significant loss of performance of the same.
- EP 0 070 572 discloses an ignition system at the primary winding of the transformer is part of an LC resonant circuit is, in turn, in series with a Chopper or switch acting transistor and a Resistor is switched.
- the transistor is doing with Pulse trains with modulated in their duration individual pulses controlled so that the spark plugs with Zündimpuls Kunststoff with fed in their energy modulated single ignition pulses become.
- the intended chopper is not suitable for the formation of ignition sequences, as for training a plasma as described below are necessary.
- WO 98/19066 describes an ignition system in which the primary coil of a transformer is part of a resonant circuit in which a capacitor and a discharge switch are arranged.
- the resonant circuit is excited externally controlled.
- the first ignition is done by discharging a capacitor after closing a discharge switch.
- By excitation of the resonant circuit during the "return oscillation" enough energy is introduced to maintain the spark for any length of time.
- the ignition frequency is thus tied to the natural frequency of the resonant circuit and thus can hardly be varied, in particular, a circuit in this embodiment is not suitable to produce very rapidly successive ignition pulses.
- the primary winding of an ignition coil is used, on the one hand, to transform the ignition energy stored in a storage capacitor to the high value required for ignition, and, on the other hand, to transform the DC voltage supplied by a battery to the ignition energy to be stored in the capacitor ,
- This is also realized by using switching transistors, which are controlled by phase-shifted pulse trains, but with a constant duty cycle.
- the aim of this invention is to replace the voltage converter, which has the task of converting the originating from the electrical system battery DC voltage in the much higher DC charging voltage, so as to equip the ignition more compact and with a smaller number of components.
- the proposed circuit is, however, not suitable for using the energy stored on the secondary side of the transformer for a subsequent ignition, if the formation of a spark should be omitted.
- the aim of the invention is to overcome these disadvantages avoid and an ignition circuit of the type mentioned to propose, even at high compression Internal combustion engines ensure safe ignition and at it only leads to a low current load on the electrodes of the Spark plugs is coming.
- the circuit should be suitable to deliver ignition impulses in the fuel mixture, too if initially no ignition occurs, induce ionization and thus initiate plasma formation before it becomes the actual Ignition comes.
- the duty cycle of the firing order is intended variable and the energy stored in the transformer Failed ignitions in suitable storage capacitors traceable.
- the proposed measures ensure that several ignition pulses can be generated during the intended firing period. This increases the likelihood of a successful ignition.
- the primary winding of the ignition coil is connected in the shunt branch of a series circuit of two similar electronic switches and a series circuit of two capacitors bridge circuit, wherein the electronic switches each have a diode is connected in anti-parallel and a pulse during the intended firing time, the electronic switch with several order each 180 ° out of phase pulses impinged.
- This also results in the very significant advantage that when ignoring a spark between the electrodes, a spark plug, the energy in the circuit is stored to a considerable extent and is also available for the next ignition pulse. This also ensures that it comes during the scheduled ignition duration even under difficult ignition conditions to form a spark.
- Ignition circuit is in the fact that the ignition, at already ignited spark between the electrodes of the spark plug by changing the frequency and the width of the Switch driving pulses can be controlled. Thereby is a very extensive protection of the electrodes of the spark plug possible, since just during the burning time of the spark a very significant reduction of the ignition current is possible and As a result, the wear of the electrodes significantly reduced can be.
- the illustrated circuit has a control part 1 on, which is designed essentially as a frequency divider, at its two exits II, III by 180 ° phase-shifted signal trains supplies. This results in this Signal trains with respect to ground or a further terminal 2, with one pole of the primary winding L1 of an ignition coil 3rd connected is.
- This pole of the primary winding L1 is further with a central connection one of two electronic switches T1, T2 formed series connection, whose Control electrodes with outputs II and III of the control unit 1 are connected.
- This series connection of the two electronic Switch T1, T2 is connected to ground GND and to a voltage source U connected, preferably a controllable voltage of 12 delivers up to 300V DC.
- each electronic switch T1, T2 is a Diode D1, D2 connected in anti-parallel, preferably very rapidly switching diodes are provided.
- T2 To the series connection of the two electronic Switch T1, T2 is further a series connection of two Capacitors C2, C3 connected in parallel, at whose Middle terminal of the second pole of the primary winding L1 as Fully transformer trained ignition coil 3 is connected, which is preferably provided with a ferrite core.
- a storage capacitor C1 is provided, which is also connected to the voltage source U.
- One pole of the secondary coil L2 of the ignition coil 3 is over a resistor R1 to ground and the second pole to a Electrode of a spark plug 4 connected, the second electrode connected to ground.
- a sensor 6 for detecting the Zündstromes provided with a control circuit. 5 connected is.
- This is with a signal train VIII (FIG. 2) supplied, the delivery of control pulses I to the control part 1 at a given time and for a given one Time allows.
- the control circuit 5 with a signal train IX acted upon. This puts within the Time period for the delivery of control pulses I a period of time fixed, after which the setpoint for the ignition current is reduced.
- a pulse train is applied to the input I of the control part 1, its duty cycle, as can be seen from Fig. 2, over the ignition duration decreases. It can also be provided, the To change the frequency of this pulse train over the duration of the ignition, in particular to reduce the duration of ignition.
- the pulse train I causes at the outputs II, III of the Control part 1, the pulse trains II, III (Fig. 2), the are mutually phase-shifted by 180 ° and their Pulse duration and frequency of pulse train I depends.
- Ignites a spark between the electrodes of the Spark plug 4, so causes the forming Zündstrom (Diagram VII), which also flows through the secondary coil L2, a corresponding reaction on the primary coil L1 of Ignition coil 3 and it will return energy to the circuit supplied, whereby the ignition current, the electrodes of the Spark plug 4 loaded, sinks.
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)
Description
In DE 40 09 145 A1 wird die Primärwicklung einer Zündspule einerseits dazu verwendet, die in einem Speicherkondensator gespeicherte Zündenergie auf den für die Zündung erforderlichen hohen Wert zu transformieren, andererseits aber auch die von einer Batterie gelieferte Gleichspannung auf die im Kondensator zu speichernde Zündenergie zu transformieren. Das wird ebenfalls durch Verwendung von Schalttransistoren realisiert, die von phasenverschobenen Impulszügen, allerdings mit gleichbleibendem Tastverhältnis, angesteuert werden. Ziel dieser Erfindung ist es, den Spannungswandler, der die Aufgabe hat, die aus der Bordnetzbatterie stammende Gleichspannung in die wesentlich höhere Ladegleichspannung umzuwandeln, zu ersetzen, um so die Zündanlage kompakter und mit einer geringeren Anzahl von Bauteilen auszustatten. Die vorgeschlagene Schaltung ist allerdings nicht dazu geeignet, die auf der Sekundärseite des Transformators gespeicherte Energie für eine darauffolgende Zündung zu verwenden, falls die Ausbildung eines Zündfunkens unterbleiben sollte.
Die Primärwicklung der Zündspule ist dabei im Querzweig einer aus einer Reihenschaltung zweier gleichartiger elektronischen Schalter und einer Reihenschaltung aus zwei Kondensatoren bestehenden Brückenschaltung geschaltet, wobei zu den elektronischen Schaltern jeweils eine Diode antiparallel geschaltet ist und ein Impulsgeber während der vorgesehenen Zünddauer die elektronischen Schalter mit mehreren um jeweils 180° phasenverschobenen Impulsen beaufschlagt. Dabei ergibt sich auch der sehr wesentliche Vorteil, dass bei unterbliebener Ausbildung eines Zündfunkens zwischen den Elektroden eine Zündkerze die Energie in der Schaltung zu einem erheblichen Teil gespeichert wird und für den nächsten Zündimpuls zusätzlich zur Verfügung steht. Dadurch ist auch sichergestellt, dass es während der vorgesehenen Zünddauer auch unter schwierigen Zündbedingungen zur Ausbildung eines Zündfunkens kommt.
Claims (6)
- Zündschaltung für eine fremdgezündete Brennkraftmaschine, insbesondere einer hochverdichtenden Brennkraftmaschine, mit einer sekundär mit einer Zündkerze (4) verbundenen Zündspule (3) zur Erzeugung von Hochspannung, deren Primärwicklung (L1) mit einem Kondensator (C2, C3) in Reihe geschaltet und diese Reihenschaltung mit einer Gleichspannungsquelle (U) verbunden ist, wobei ein elektronischer Schalter (T1, T2) vorgesehen ist, dessen Steuerelektrode mit einem Impulsgeber (1) verbunden ist, der während einer vorgesehenen Zünddauer mindestens einen Steuerimpuls liefert, dadurch gekennzeichnet, dass die Zündspule (3) als Volltransformator ausgebildet ist, deren Primärwicklung (L1) im Querzweig einer aus einer Reihenschaltung zweier gleichartiger elektronischen Schalter (T1, T2) und einer parallel dazu geschalteten Reihenschaltung aus zwei Kondensatoren (C2, C3) bestehenden Brückenschaltung geschaltet ist, wobei zu den elektronischen Schaltern (T1, T2) jeweils eine Diode (D1, D2) antiparallel geschaltet ist und der Impulsgeber (1) während der vorgesehenen Zünddauer die elektronischen Schalter (T1, T2) mit mehreren um jeweils 180° phasenverschobenen Impulsen mit veränderlicher Pulsdauer und Frequenz beaufschlagt.
- Zündschaltung nach Anspruch 1, dadurch gekennzeichnet, dass die Zündspule (3) einen Ferritkern aufweist.
- Zündschaltung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Einstellung der Kondensatoren (C2, C3) in Bezug auf die Induktivität der Zündspule (3) so erfolgt, dass das zerfallende Magnetfeld der Zündspule (3), die Spannung an den Kondensatoren (C2, C3) um die halbe bis um die doppelte Betriebsspannung (U), vorzugsweise um die Betriebsspannung (U) verschiebt.
- Zündschaltung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Elektroden der an die Zündspule (3) angeschlossenen Zündkerzen gegen das Innere des Brennraumes gerichteten Öffnungswinkel von 60 bis 90° aufweisen.
- Zündschaltung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Fühler (6) zur Erfassung des Zündstromes vorgesehen ist, der mit einer Regelschaltung (5) verbunden ist, die in Abhängigkeit vom Zündstrom die Pulsdauer der Impulse des Impulsgebers (1) vermindert.
- Zündschaltung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein Fühler (6) zur Erfassung des Zündstromes vorgesehen ist, der mit einer Regelschaltung (5) verbunden ist, die in Abhängigkeit vom Zündstrom die Primärspannnung an der Brückenschaltung regelt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00984610T ATE291695T1 (de) | 1999-12-17 | 2000-12-18 | Steuerbare zündschaltung |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT213499 | 1999-12-17 | ||
AT213499 | 1999-12-17 | ||
AT2122000 | 2000-02-11 | ||
AT2122000 | 2000-02-11 | ||
PCT/AT2000/000346 WO2001044655A2 (de) | 1999-12-17 | 2000-12-18 | Steuerbare zündschaltung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1238195A2 EP1238195A2 (de) | 2002-09-11 |
EP1238195B1 true EP1238195B1 (de) | 2005-03-23 |
Family
ID=25597775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00984610A Expired - Lifetime EP1238195B1 (de) | 1999-12-17 | 2000-12-18 | Steuerbare zündschaltung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1238195B1 (de) |
AU (1) | AU2126201A (de) |
DE (1) | DE50009885D1 (de) |
WO (1) | WO2001044655A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110369855B (zh) * | 2019-08-19 | 2024-06-04 | 无锡前元自动化科技有限公司 | 一种高周波火花保护器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1263248A (en) * | 1968-06-10 | 1972-02-09 | Rotax Ltd | Ignition systems |
FR2510199A1 (fr) | 1981-07-22 | 1983-01-28 | Siemens Sa | Systeme d'allumage pour des moteurs a combustion interne |
US4493306A (en) * | 1982-12-20 | 1985-01-15 | Ford Motor Company | Enhanced spark energy distributorless ignition system (B) |
DE4009145A1 (de) | 1990-03-21 | 1991-09-26 | Bayerische Motoren Werke Ag | Kondensatorzuendanlage fuer brennkraftmaschinen |
FR2665999B1 (fr) * | 1990-08-14 | 1994-01-28 | General Electric Cgr Sa | Dispositif d'obtention d'une tension continue reglable. |
FR2717015B1 (fr) * | 1994-03-03 | 1996-04-26 | Alcatel Converters | Alimentation à découpage adaptée pour permettre des commutations sous tension réduite. |
DE19643785C2 (de) | 1996-10-29 | 1999-04-22 | Ficht Gmbh & Co Kg | Elektrische Zündvorrichtung, insbesondere für Brennkraftmaschinen, und Verfahren zum Betreiben einer Zündvorrichtung |
JP3673075B2 (ja) * | 1998-03-09 | 2005-07-20 | 新電元工業株式会社 | スイッチング電源装置 |
-
2000
- 2000-12-18 WO PCT/AT2000/000346 patent/WO2001044655A2/de active IP Right Grant
- 2000-12-18 EP EP00984610A patent/EP1238195B1/de not_active Expired - Lifetime
- 2000-12-18 DE DE50009885T patent/DE50009885D1/de not_active Expired - Fee Related
- 2000-12-18 AU AU21262/01A patent/AU2126201A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
AU2126201A (en) | 2001-06-25 |
WO2001044655A3 (de) | 2002-03-21 |
WO2001044655A2 (de) | 2001-06-21 |
DE50009885D1 (de) | 2005-04-28 |
EP1238195A2 (de) | 2002-09-11 |
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