EP0491167A1 - Ignition device particularly for combustion engine - Google Patents

Ignition device particularly for combustion engine Download PDF

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Publication number
EP0491167A1
EP0491167A1 EP91119552A EP91119552A EP0491167A1 EP 0491167 A1 EP0491167 A1 EP 0491167A1 EP 91119552 A EP91119552 A EP 91119552A EP 91119552 A EP91119552 A EP 91119552A EP 0491167 A1 EP0491167 A1 EP 0491167A1
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EP
European Patent Office
Prior art keywords
ignition
transistor
transformer
diode
thyristor
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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.)
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EP91119552A
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German (de)
French (fr)
Inventor
Odd Peters Karsten
Dieter Teutsch
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BERU RUPRECHT GmbH and Co KG
BERU Ruprecht GmbH and Co KG
Beru Werk Albert Ruprecht GmbH and Co KG
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Publication of EP0491167A1 publication Critical patent/EP0491167A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F02P3/00—Other installations
    • F02P3/005—Other installations having inductive-capacitance energy storage

Definitions

  • the invention relates to an ignition system, in particular for an internal combustion engine, with a control stage, a transistor power output stage connected downstream thereof and an ignition transformer supplied by the power output stage.
  • Such an ignition system is known as a transistor coil ignition system or TS-Z ignition system, for example as a contact-controlled transistor ignition TZ-K, as a transistor ignition with induction transmitter TZ-I or as a transistor ignition with Hall transmitter TZ-H.
  • High-voltage capacitor ignition systems HK-Z are also known, which are also referred to as thyristor ignitions and in which the ignition energy is stored in the electrical field of a capacitor. See, for example, BOSCH Technical Instruction, Battery Ignition, Robert Bosch GmbH 1987.
  • TS-Z ignition systems Due to the high resistance internal resistance of the high voltage source, eg the ignition coil and the consequently low current rise, which leads to a low voltage increase at the spark gap, TS-Z ignition systems have a low one Shunt insensitivity.
  • the disadvantage of the HK-Z ignition systems is their short burning time, which is due to the fast capacitor discharge.
  • the object on which the invention is based is therefore to design the ignition system of the type mentioned at the outset in such a way that it is highly insensitive to shunts and at the same time has a long burning time.
  • the power output stage is connected to the transformer via a decoupling diode and a thyristor and a storage choke, a storage capacitor and a protective diode are connected in parallel with the transformer.
  • the ignition system according to the invention enables a shunt insensitivity of less than 50 k ⁇ with a simultaneous long burning time of several milliseconds and is characterized by cost-effective production and high efficiency.
  • a particularly preferred development of the ignition system according to the invention is the subject of claim 2.
  • the embodiment of the ignition system according to the invention shown in Fig. 1 comprises a control stage which is formed by a rectangular generator or pulse width modulator PWM with a structure known per se.
  • the drive stage supplies a square-wave pulse of a transistor output stage, which consists of a resistor R1, a transistor T1 and one between the base and the collector of the Transistor T1 connected Z-diode Z1 exists.
  • a transformer for example the primary winding of an ignition coil Zspl without an air gap, the secondary winding of which develops the ignition voltage which is applied to a spark plug.
  • the power output stage i.e. the collector of transistor T1 connected via a decoupling diode D1 and a thyristor Thyl to the primary winding of the transformer Zspl, and a storage inductor L1
  • a storage capacitor C1 and a protective diode D2 are connected in parallel with the primary winding of the transformer Zspl and serve to protect the capacitor C1 .
  • the storage capacitor C1 has, for example, a capacitance of approximately 1 ⁇ F to 3 ⁇ F in a pulse-proof design.
  • a further Z diode Z2 is connected in parallel with the thyristor Thyl and determines the ignition voltage of the thyristor Thyl. This Z-diode Z2 is not necessary if the thyristor Thyl e.g. is spark-ignited when the internal combustion engine is ignited.
  • the transformer Zspl is provided with a closed magnetic circuit.
  • the square-wave signal from the control is fed to the transistor T1 of the transistor power output stage via the resistor R1, as a result of which the transistor T1 is brought into the conductive or blocking state, as shown in FIG. 2a.
  • the energy W L1 stored in the storage inductor L1 is transferred via the decoupling diode D1 to the capacitor C1 (FIG. 3d) and then transferred to the transformer Zspl.
  • the voltage in the capacitor C1 increases until the Zener diode Z2 becomes conductive and thus ignites the thyristor Thyl (FIGS. 3e, 4f, g and 5h, i).
  • the energy remaining in the storage choke L1, ie W rest W L1 - W C1 , is transferred via the diode D1 and the thyristor Thyl to the transformer Zspl and the spark gap, whereby a long burning time is achieved.
  • the storage capacitor C2 is connected in parallel with the transformer Zspl to produce a low-impedance resonant circuit which results in a steep current rise.
  • An ignition system with the construction described above is characterized by a high shunt insensitivity achieved by the discharge circuit arrangement C1, Thyl and Zspl and a long burning time, which is achieved via the circuit arrangement L1, D1, Thyl and Zspl, so that it can be used in internal combustion engines , In particular in internal combustion engines with alternative fuels and in high-performance machines, such as racing engines, can be used as an ignition system for igniting soot filter burners.
  • the ignition coils used here have only a very low level of self-heating due to the design that is possible with this ignition system, and the efficiency of the ignition system is further improved significantly compared to the known transistor coil ignitions and the high-voltage capacitor ignitions.

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  • 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)

Abstract

Ignition device particularly for an internal combustion engine with a drive stage which drives a transistor power output stage which supplies a transformer, for example an ignition coil (Zsp1). In the circuit between the power output stage composed of a resistor (R1), a transistor (T1) and a Z-diode (Z1) and the ignition coil (Zsp1) there is a decoupling diode (D1) and a thyristor (Thy1). Connected in parallel with the ignition coil (Zsp1) there is a storage capacitor (C1) and a storage reactor (L1). An ignition device of this design is characterised by a high resistance to shunting and a long burning life. <IMAGE>

Description

Die Erfindung betrifft eine Zündanlage, insbesondere für eine Brennkraftmaschine, mit einer Ansteuerstufe, einer dieser nachgeschalteten Transistorleistungsendstufe und einem von der Leistungsendstufe versorgten Zündübertrager.The invention relates to an ignition system, in particular for an internal combustion engine, with a control stage, a transistor power output stage connected downstream thereof and an ignition transformer supplied by the power output stage.

Eine derartige Zündanlage ist als Transistorspulenzündanlage oder TS-Z Zündanlage, beispielsweise als kontaktgesteuerte Transistorzündung TZ-K, als Transistorzündung mit Induktionsgeber TZ-I oder als Transistorzündung mit Hallgeber TZ-H bekannt.Such an ignition system is known as a transistor coil ignition system or TS-Z ignition system, for example as a contact-controlled transistor ignition TZ-K, as a transistor ignition with induction transmitter TZ-I or as a transistor ignition with Hall transmitter TZ-H.

Es sind weiterhin Hochspannungskondensatorzündanlagen HK-Z bekannt, die auch als Thyristorzündungen bezeichnet werden, und bei denen die Zündenergie im elektrischen Feld eines Kondensators gespeichert wird. Hierzu siehe beispielsweise BOSCH Technische Unterrichtung, Batteriezündung, Robert Bosch GmbH 1987.High-voltage capacitor ignition systems HK-Z are also known, which are also referred to as thyristor ignitions and in which the ignition energy is stored in the electrical field of a capacitor. See, for example, BOSCH Technical Instruction, Battery Ignition, Robert Bosch GmbH 1987.

Aufgrund des hochohmigen Innenwiderstandes der Hochspannungsquelle, z.B. der Zündspule und des demzufolge niedrigen Stromanstiegs, der zu einem niedrigen Spannungsanstieg an der Funkenstrecke führt, haben TS-Z Zündanlagen jedoch eine geringe Nebenschlußunempfindlichkeit. Der Nachteil der HK-Z Zündanlagen ist ihre kurze Brenndauer, die durch die schnelle Kondensatorentladung bedingt ist.Due to the high resistance internal resistance of the high voltage source, eg the ignition coil and the consequently low current rise, which leads to a low voltage increase at the spark gap, TS-Z ignition systems have a low one Shunt insensitivity. The disadvantage of the HK-Z ignition systems is their short burning time, which is due to the fast capacitor discharge.

Die der Erfindung zugrundeliegende Aufgabe besteht daher darin, die Zündanlage der eingangs genannten Art so auszubilden, daß sie eine hohe Nebenschlußunempfindlichkeit bei gleichzeitig langer Brenndauer hat.The object on which the invention is based is therefore to design the ignition system of the type mentioned at the outset in such a way that it is highly insensitive to shunts and at the same time has a long burning time.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Leistungsendstufe über eine Entkopplungsdiode und einen Thyristor mit dem Übertrager verbunden ist und parallel zum Übertrager eine Speicherdrossel, ein Speicherkondensator und eine Schutzdiode geschaltet sind.This object is achieved according to the invention in that the power output stage is connected to the transformer via a decoupling diode and a thyristor and a storage choke, a storage capacitor and a protective diode are connected in parallel with the transformer.

Die erfindungsgemäße Zündanlage ermöglicht eine Nebenschlußunempfindlichkeit von weniger als 50 kΩ bei einer gleichzeitigen langen Brenndauer von mehreren Millisekunden und zeichnet sich durch eine kostengünstige Fertigung und einen hohen Wirkungsgrad aus.The ignition system according to the invention enables a shunt insensitivity of less than 50 kΩ with a simultaneous long burning time of several milliseconds and is characterized by cost-effective production and high efficiency.

Eine besonders bevorzugte Weiterbildung der erfindungsgemäßen Zündanlage ist Gegenstand des Anspruchs 2.A particularly preferred development of the ignition system according to the invention is the subject of claim 2.

Im folgenden wird anhand der zugehörigen Zeichnung ein besonders bevorzugtes Ausführungsbeispiel der Erfindung näher beschrieben. Es zeigen

  • Fig. 1 das schematische Schaltbild des Ausführungsbeispiels der Erfindung und
  • Fig. 2 bis 6 die Wellenformen der Signale, die an verschiedenen Punkten der in Fig. 1 dargestellten Schaltung auftreten.
A particularly preferred exemplary embodiment of the invention is described in more detail below with reference to the accompanying drawing. Show it
  • Fig. 1 shows the schematic diagram of the embodiment of the invention and
  • FIGS. 2 through 6 show the waveforms of the signals that appear at various points in the circuit shown in FIG. 1.

Das in Fig. 1 dargestellte Ausführungsbeispiel der erfindungsgemäßen Zündanlage umfaßt eine Ansteuerstufe, die von einem Rechteckgenerator oder Impulsweitenmodulator PWM mit an sich bekanntem Aufbau gebildet wird.The embodiment of the ignition system according to the invention shown in Fig. 1 comprises a control stage which is formed by a rectangular generator or pulse width modulator PWM with a structure known per se.

Die Ansteuerstufe liefert einen Rechteckimpuls einer Transistorleistungsendstufe, die aus einem Widerstand R1, einem Transistor T1 und einem zwischen die Basis und den Kollektor des Transistors T1 geschalteten Z-Diode Z1 besteht.The drive stage supplies a square-wave pulse of a transistor output stage, which consists of a resistor R1, a transistor T1 and one between the base and the collector of the Transistor T1 connected Z-diode Z1 exists.

Im Stromkreis zwischen der Leistungsendstufe und einem der Anschlüsse der Spannungsversorgung +UB liegt ein Übertrager, beispielsweise die Primärwicklung einer Zündspule Zspl ohne Luftspalt, deren Sekundärwicklung die Zündspannung entwickelt, die an einer Zündkerze liegt.In the circuit between the power output stage and one of the connections of the voltage supply + UB there is a transformer, for example the primary winding of an ignition coil Zspl without an air gap, the secondary winding of which develops the ignition voltage which is applied to a spark plug.

Wie es in Fig. 1 im einzelnen dargestellt ist, ist die Leistungsendstufe, d.h. der Kollektor des Transistors T1, über eine Entkopplungsdiode D1 und einen Thyristor Thyl mit der Primärwicklung des Übertragers Zspl verbunden und sind parallel zu der Primärwicklung des Übertragers Zspl eine Speicherdrossel L1, ein Speicherkondensator C1 und eine Schutzdiode D2 geschaltet, die zum Schutz des Kondensators C1 dient. Der Speicherkondensator C1 hat beispielsweise eine Kapazität von etwa 1µF bis 3µF in impulsfester Ausführung.As shown in detail in Fig. 1, the power output stage, i.e. the collector of transistor T1, connected via a decoupling diode D1 and a thyristor Thyl to the primary winding of the transformer Zspl, and a storage inductor L1, a storage capacitor C1 and a protective diode D2 are connected in parallel with the primary winding of the transformer Zspl and serve to protect the capacitor C1 . The storage capacitor C1 has, for example, a capacitance of approximately 1µF to 3µF in a pulse-proof design.

Parallel zum Thyristor Thyl ist eine weitere Z-Diode Z2 geschaltet, die die Zündspannung des Thyristors Thyl bestimmt. Diese Z-Diode Z2 erübrigt sich, wenn der Thyristor Thyl z.B. bei der Zündung der Brennkraftmaschine fremdgezündet wird. Der Übertrager Zspl ist mit einem geschlossenen Magnetkreis versehen.A further Z diode Z2 is connected in parallel with the thyristor Thyl and determines the ignition voltage of the thyristor Thyl. This Z-diode Z2 is not necessary if the thyristor Thyl e.g. is spark-ignited when the internal combustion engine is ignited. The transformer Zspl is provided with a closed magnetic circuit.

Im folgenden wird anhand der Fig. 2 bis 6 die Arbeitsweise des in Fig. 1 dargestellten Ausführungsbeispiels der erfindungsgemäßen Zündanlage beschrieben.The mode of operation of the exemplary embodiment of the ignition system according to the invention shown in FIG. 1 is described below with reference to FIGS. 2 to 6.

Das Rechtecksignal von der Ansteuerung wird über den Widerstand R1 dem Transistor T1 der Transistorleistungsendstufe zugeführt, wodurch der Transistor T1 in den leitenden oder sperrenden Zustand gebracht wird, wie es in Fig. 2a dargestellt ist.The square-wave signal from the control is fed to the transistor T1 of the transistor power output stage via the resistor R1, as a result of which the transistor T1 is brought into the conductive or blocking state, as shown in FIG. 2a.

Wenn der Transistor T1 leitet, wird in der Speicherdrossel L1 die folgende Energie gespeichert (Fig. 2b):

W L1 = 1/2 L I²

Figure imgb0001

When the transistor T1 is conducting, the following energy is stored in the storage inductor L1 (FIG. 2b):

W L1 = 1/2 L I²
Figure imgb0001

Wenn der Transistor T1 in den sperrenden Zustand übergeht, wird die in der Speicherdrossel L1 gespeicherte Energie WL1 über die Entkopplungsdiode D1 auf den Kondensator C1 (Fig. 3d) und danach auf den Übertrager Zspl übertragen. Im Kondensator C1 erhöht sich die Spannung, bis die Z-Diode Z2 leitend wird und damit den Thyristor Thyl zündet (Fig. 3e, 4f, g und 5h, i). Wenn der Thyristor Thyl zündet, wird die im Kondensator C1 gespeicherte Energie, d.h. WC1 = 1/2 C U² über den Übertrager Zspl an eine Funkenstrecke, beispielsweise eine Zündkerze, übertragen (Fig. 2c).When the transistor T1 changes to the blocking state, the energy W L1 stored in the storage inductor L1 is transferred via the decoupling diode D1 to the capacitor C1 (FIG. 3d) and then transferred to the transformer Zspl. The voltage in the capacitor C1 increases until the Zener diode Z2 becomes conductive and thus ignites the thyristor Thyl (FIGS. 3e, 4f, g and 5h, i). When the thyristor Thyl fires, the energy stored in the capacitor C1, ie W C1 = 1/2 C U², is transmitted via the transformer Zspl to a spark gap, for example a spark plug (FIG. 2c).

Die danach in der Speicherdrossel L1 verbleibende Energie, d.h. WRest = WL1 - WC1, wird über die Diode D1 und den Thyristor Thyl auf den Übertrager Zspl und die Funkenstrecke übertragen, wodurch eine lange Brenndauer erzielt wird.The energy remaining in the storage choke L1, ie W rest = W L1 - W C1 , is transferred via the diode D1 and the thyristor Thyl to the transformer Zspl and the spark gap, whereby a long burning time is achieved.

Bei der erfindungsgemäßen Zündanlage ergibt sich durch die Schaltung des Speicherkondensators C2 parallel zum Übertrager Zspl ein niederohmiger Schwingkreis, der einen steilen Stromanstieg zur Folge hat. Dieser Stromanstieg wird über den Übertrager Zspl hochspannungsmäßig übertragen (Fig. 6):

S = Δ U/Δ t

Figure imgb0002

In the ignition system according to the invention, the storage capacitor C2 is connected in parallel with the transformer Zspl to produce a low-impedance resonant circuit which results in a steep current rise. This current rise is transmitted in high voltage via the transformer Zspl (FIG. 6):

S = Δ U / Δ t
Figure imgb0002

Eine Zündanlage mit dem oben beschriebenen Aufbau zeichnet sich durch eine durch die Entladungsschaltungsanordnung C1, Thyl und Zspl erzielte hohe Nebenschlußunempfindlichkeit und eine lange Brenndauer aus, die über die Schaltungsanordnung L1, D1, Thyl und Zspl erreicht wird, so daß sie neben der Verwendung bei Brennkraftmaschinen, insbesondere bei Brennkraftmaschinen mit alternativen Kraftstoffen und bei Hochleistungsmaschinen, wie beispielsweise Rennmotoren, als Zündanlage zum Zünden von Rußfilterbrennern verwandt werden kann.An ignition system with the construction described above is characterized by a high shunt insensitivity achieved by the discharge circuit arrangement C1, Thyl and Zspl and a long burning time, which is achieved via the circuit arrangement L1, D1, Thyl and Zspl, so that it can be used in internal combustion engines , In particular in internal combustion engines with alternative fuels and in high-performance machines, such as racing engines, can be used as an ignition system for igniting soot filter burners.

Die dabei verwandten Zündspulen haben durch die bei dieser Zündanlage mögliche Auslegung nur eine sehr geringe Eigenerwärmung, wobei weiterhin der Wirkungsgrad der Zündanlage gegenüber den bekannten Transistorspulenzündungen und den Hochspannungskondensatorzündungen wesentlich verbessert ist.The ignition coils used here have only a very low level of self-heating due to the design that is possible with this ignition system, and the efficiency of the ignition system is further improved significantly compared to the known transistor coil ignitions and the high-voltage capacitor ignitions.

Claims (2)

Zündanlage, insbesondere für eine Brennkraftmaschine mit einer Ansteuerstufe, einer davon angesteuerten Transistorleistungsendstufe und einem über die Leistungsendstufe versorgten Zündübertrager, dadurch gekennzeichnet, daß die Leistungsendstufe über eine Entkopplungsdiode (D1) und einen Thyristor (Thyl) mit dem Übertrager (Zspl) verbunden ist und parallel zum Übertrager (Zspl) eine Speicherdrossel (L1) und ein Speicherkondensator (C1) und eine Schutzdiode (D2) geschaltet sind.Ignition system, in particular for an internal combustion engine with a control stage, a transistor power stage driven by it and an ignition transformer supplied via the power stage, characterized in that the power stage is connected via a decoupling diode (D1) and a thyristor (Thyl) to the transformer (Zspl) and in parallel a storage choke (L1) and a storage capacitor (C1) and a protective diode (D2) are connected to the transformer (Zspl). Zündanlage nach Anspruch 1, gekennzeichnet durch eine Z-Diode (Z2), die parallel zum Thyristor (Thyl) geschaltet ist.Ignition system according to claim 1, characterized by a Z-diode (Z2) which is connected in parallel to the thyristor (Thyl).
EP91119552A 1990-12-19 1991-11-15 Ignition device particularly for combustion engine Withdrawn EP0491167A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4040732 1990-12-19
DE19904040732 DE4040732A1 (en) 1990-12-19 1990-12-19 IGNITION SYSTEM, ESPECIALLY FOR AN INTERNAL COMBUSTION ENGINE

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040982A1 (en) * 2006-08-31 2008-03-20 Michael Reimann Energy storage-high current-ignition for electrical circuit for ignition of combustible gas fuel mixture in combustion chamber of spark ignition internal combustion engine, has high voltage condenser ignition and transistor coil ignition

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410257A (en) * 1965-03-11 1968-11-12 Lucas Industries Ltd Spark ignition systems
DE1539212A1 (en) * 1965-10-07 1970-04-02 Gen Motors Corp Ignition system for internal combustion engines
US3943905A (en) * 1973-07-27 1976-03-16 Gunter Hartig Method and device for igniting combustible substances

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410257A (en) * 1965-03-11 1968-11-12 Lucas Industries Ltd Spark ignition systems
DE1539212A1 (en) * 1965-10-07 1970-04-02 Gen Motors Corp Ignition system for internal combustion engines
US3943905A (en) * 1973-07-27 1976-03-16 Gunter Hartig Method and device for igniting combustible substances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040982A1 (en) * 2006-08-31 2008-03-20 Michael Reimann Energy storage-high current-ignition for electrical circuit for ignition of combustible gas fuel mixture in combustion chamber of spark ignition internal combustion engine, has high voltage condenser ignition and transistor coil ignition

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