EP0250445A1 - Ignition system for internal combustion engines. - Google Patents

Ignition system for internal combustion engines.

Info

Publication number
EP0250445A1
EP0250445A1 EP86905208A EP86905208A EP0250445A1 EP 0250445 A1 EP0250445 A1 EP 0250445A1 EP 86905208 A EP86905208 A EP 86905208A EP 86905208 A EP86905208 A EP 86905208A EP 0250445 A1 EP0250445 A1 EP 0250445A1
Authority
EP
European Patent Office
Prior art keywords
core
ignition system
ignition
primary winding
internal combustion
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
Application number
EP86905208A
Other languages
German (de)
French (fr)
Other versions
EP0250445B1 (en
Inventor
Dieter Betz
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0250445A1 publication Critical patent/EP0250445A1/en
Application granted granted Critical
Publication of EP0250445B1 publication Critical patent/EP0250445B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • F02P3/02—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F17/062—Toroidal core with turns of coil around it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the invention relates to an ignition system according to the preamble of the main claim. It is already known (according to DE-PS 23 53 556) an ignition system lying in this direction, in which an induction coil is also provided in the circuit of the primary winding, but which gives the ignition pulse voltage there a steep rising edge and thus a safe one Inflammation of the fuel-air mixture wants to reach even with sooty spark plugs. In such and in general with all ignition systems in which the ignition energy is stored in an ignition coil, there is a risk that when the circuit of the primary winding is switched on, the secondary voltage of the ignition coil rises so high that a so-called "switch-on spark” and thus a preliminary flame of the Air-fuel mixture occurs, which is undesirable. Advantages of the invention
  • FIG. 1 shows an ignition system with the measure according to the invention
  • FIG. 2 shows a somewhat modified ignition system
  • FIG. 3 shows a core for the induction coil upstream of the primary winding
  • FIG. 4 shows an induction (B) field strength (H) diagram with the course of the magnetization curve , for example for the core in FIG. 3.
  • the ignition system shown in Figure 1 is intended for the internal combustion engine, not shown, of a motor vehicle, also not shown.
  • the ignition system is fed from a power source 1, which can be the battery of the motor vehicle.
  • a power source 1 can be the battery of the motor vehicle.
  • a line 2 connected to ground and from the positive pole an operating switch 3 containing supply line 4.
  • the supply line 4 initially runs; via an induction coil 5, then via the primary winding 6 of an ignition coil 7 and finally via an interrupter 8 to the ground line 2.
  • the secondary winding 8 the ignition coil 7 also has a connection to the ground line 2 via at least one spark plug 10.
  • the induction coil 5 is provided with a core 11 made of magnetically conductive material, which according to the invention is an at least almost closed core. With such a core, it can be achieved that the secondary voltage generated when the circuit containing the primary winding 6 and the induction coil 5 is switched on - compared to such ignition systems without an induction coil 5 - is halved.
  • the invention can also be used in transistorized coil ignition systems, i.e. in ignition systems in which the interrupter 8 is a controlled transistor.
  • a laminated iron core is selected as the core 11, as shown in FIG. 3.
  • a material with a magnetization curve should be chosen for the core, which is at least approximately a steep straight line a at first and changes into an only moderately increasing saturation curve b, as is the case in the induction (B) field strength (H) - Diagram according to Figure 4 is shown. Further corrections of the magnetization curve are possible by giving the core 11 an uneven cross-sectional shape, for example by constrictions 12 (FIG. 3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Une installation d'allumage pour moteurs à combustion interne comprend un circuit qui part d'une source de courant (1) et qui contient l'enroulement primaire (6) d'une bobine d'allumage (7) et une bobine d'inductance (5) à noyau magnétiquement conducteur (11) connectée en série avec l'enroulement primaire (6). Ce noyau (11) est un noyau presque fermé, ce qui a l'avantage de réduire considérablement la tension transmise à l'enroulement secondaire (9) lors de la mise sous tension de l'enroulement primaire (6), en évitant l'apparition d'étincelles de fermeture et un allumage précoce du mélange d'air et de carburant.An ignition system for internal combustion engines comprises a circuit which starts from a current source (1) and which contains the primary winding (6) of an ignition coil (7) and an inductance coil (5) with a magnetically conductive core (11) connected in series with the primary winding (6). This core (11) is an almost closed core, which has the advantage of considerably reducing the voltage transmitted to the secondary winding (9) when energizing the primary winding (6), avoiding the appearance of closing sparks and early ignition of the air and fuel mixture.

Description

Zündanlage für BrennkraftmaschinenIgnition system for internal combustion engines
Stand der TechnikState of the art
Die Erfindung bezieht sich auf eine Zündanlage nach der Gattung des Hauptanspruches. Es ist (nach der DE-PS 23 53 556) bereits eine in dieser Richtung liegende Zündanlage bekannt, bei der ebenfalls eine Induktionsspule in dem Stromkreis der Primärwicklung vorgesehen ist, womit man aber dort dem Zün d spannungsimpuls eine steile Anstiegsflanke geben und somit eine sichere Entflammung des Kraftstoff-Luft-Gemisches auch bei verrußten Zündkerzen erreichen will. Bei solchen und überhaupt bei allen Zündanlagen, bei denen die Zündenergie in einer Zündspule gespeichert wird, besteht die Gefahr, daß bereits beim Einschalten des Stromkreises der Primärwicklung die Sekundär Spannung der Zündspule so hoch ansteigt, daß ein sogenannter "Einschaltfunke" und somit eine Vorenrflammung des Kraftstoff-Luft-Gemisches auftritt, was unerwünscht ist. Vorteile der ErfindungThe invention relates to an ignition system according to the preamble of the main claim. It is already known (according to DE-PS 23 53 556) an ignition system lying in this direction, in which an induction coil is also provided in the circuit of the primary winding, but which gives the ignition pulse voltage there a steep rising edge and thus a safe one Inflammation of the fuel-air mixture wants to reach even with sooty spark plugs. In such and in general with all ignition systems in which the ignition energy is stored in an ignition coil, there is a risk that when the circuit of the primary winding is switched on, the secondary voltage of the ignition coil rises so high that a so-called "switch-on spark" and thus a preliminary flame of the Air-fuel mixture occurs, which is undesirable. Advantages of the invention
Durch Anwendung der kennzeichnenden Maßnahme des Hauptanspruches kann der vorerwähnte Nachteil vermieden werden.The aforementioned disadvantage can be avoided by applying the characterizing measure of the main claim.
In den Unteransprüchen sind vorteilhafte Maßnahmen für die Realisierung der Erfindung angegeben.Advantageous measures for realizing the invention are specified in the subclaims.
Zeichnungdrawing
Ausfuhrungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Zündanlage mit der erfindungsgemäßen Maßnahme, Figur 2 eine gegenüber Figur etwas abgeänderte Zündanlage, Figur 3 einen Kern für die der Primärwicklung vorgeschaltete Induktionsspule und Figur 4 ein Induktions(B)-Feldstärke(H)-Diagramm mit dem Verlauf der Magnetisierungskurve, beispielsweise für den Kern in Figur 3.Exemplary embodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows an ignition system with the measure according to the invention, FIG. 2 shows a somewhat modified ignition system, FIG. 3 shows a core for the induction coil upstream of the primary winding, and FIG. 4 shows an induction (B) field strength (H) diagram with the course of the magnetization curve , for example for the core in FIG. 3.
Beschreibung des AusführungsbeispielesDescription of the embodiment
Die in Figur 1 dargestellte Zündanlage soll für die nicht dargestellte Brennkraftmaschine eines ebenfalls nicht dargestellten Kraftfahrzeuges bestimmt sein. Die Zündanlage wird aus einer Stromquelle 1 gespeist, welche die Batterie des Kraftfahrzeuges sein kann. An der Stromquelle 1 geht von dem Minuspol eine an Masse liegende Leitung 2 und von dem Pluspol eine einen Betriebs schalt er 3 enthaltende Versorgungsleitung 4 aus. Die Versorgungsleitung 4 verlauft zunächst; über eine Induktionsspule 5, danach über die Primärwicklung 6 einer Zündspule 7 und schließlich über einen Unterbrecher 8 zur Masseleitung 2. Die Sekundärwicklung 8 der Zündspule 7 hat über mindestens eine Zündkerze 10 ebenfalls mit der Masseleitung 2 Verbindung. Die Induktionsspule 5 ist mit einem Kern 11 aus magnetisch leitfähigem Material versehen, der nach der Erfindung ein wenigstens nahezu geschlossener Kern ist. Durch einen solchen Kern läßt es sich erreichen, daß die beim Einschalten des die Primärwicklung 6 und die Induktionsspule 5 enthaltenden Stromkreises erzeugte Sekundärspannung - gegenüber solchen Zündanlagen ohne Induktionsspule 5 - um die Hälfte kleiner ist.The ignition system shown in Figure 1 is intended for the internal combustion engine, not shown, of a motor vehicle, also not shown. The ignition system is fed from a power source 1, which can be the battery of the motor vehicle. At the current source 1 from the negative pole is a line 2 connected to ground and from the positive pole an operating switch 3 containing supply line 4. The supply line 4 initially runs; via an induction coil 5, then via the primary winding 6 of an ignition coil 7 and finally via an interrupter 8 to the ground line 2. The secondary winding 8 the ignition coil 7 also has a connection to the ground line 2 via at least one spark plug 10. The induction coil 5 is provided with a core 11 made of magnetically conductive material, which according to the invention is an at least almost closed core. With such a core, it can be achieved that the secondary voltage generated when the circuit containing the primary winding 6 and the induction coil 5 is switched on - compared to such ignition systems without an induction coil 5 - is halved.
Für den Fall, daß es sich um eine Mehrzylinderbrennkraftmaschine handelt und gegebenenfalls mehrere Zündspulen mit; je einer Kerze für die einzelnen Zylinder vorgesehen sind, muß, wenn sich die Stromflußzeiten der einzelnen zu den Zündspulen gehörenden Primärwicklungen 6 überschneiden, jeder der Primärwicklungen 6 eine solche Induktionsspule 5 vorgeschaltet sein (Figur 2).In the event that it is a multi-cylinder internal combustion engine and possibly several ignition coils with; One candle each is provided for the individual cylinders, if the current flow times of the individual primary windings 6 belonging to the ignition coils overlap, such an induction coil 5 must be connected upstream of each of the primary windings 6 (FIG. 2).
Selbstverständlich kann die Erfindung auch bei transistorisierten Spulen-Zündanlagen Anwendung finden, d.h. bei solchen Zündanlagen, bei denen der Unterbrecher 8 ein gesteuerter Transistor ist.Of course, the invention can also be used in transistorized coil ignition systems, i.e. in ignition systems in which the interrupter 8 is a controlled transistor.
Im bevorzugten Fall wird als Kern 11 ein lamellierter Eisenkern gewählt, wie das in Figur 3 gezeigt ist.In the preferred case, a laminated iron core is selected as the core 11, as shown in FIG. 3.
Für den Kern sollte auf jeden Fall ein Material mit einer Magnetisierungskurve gewählt werden, die wenigstens näherungsweise zunächst eine steile Gerade a ist und knickförmig in einen nur noch mäßig ansteigenden Sättigungsverlauf b übergeht, wie das in dem Induktions(B)-Feldstärke(H)-Diagramm nach Figur 4 gezeigt ist. Weitere Korrekturen des Magnetisierungsverlaufes sind dadurch möglich, daß man dem Kern 11 eine ungleichmäßige Querschnittsform gibt, indem er beispielsweise mit Einschnürungen 12 (Figur 3) versehen wird. In any case, a material with a magnetization curve should be chosen for the core, which is at least approximately a steep straight line a at first and changes into an only moderately increasing saturation curve b, as is the case in the induction (B) field strength (H) - Diagram according to Figure 4 is shown. Further corrections of the magnetization curve are possible by giving the core 11 an uneven cross-sectional shape, for example by constrictions 12 (FIG. 3).

Claims

An sprüche Expectations
1. Zündanlage für Brennkraftmaschinen mit einem von einer Stromquelle ausgehenden Stromkreis, der die Primärwicklung einer Zündspule sowie eine in Serie zur Primärwicklung liegende Induktionsspule mit magnetisch leitfähigem Kern enthält, dadurch gekennzeichnet, daß die Induktionsspule (5) einen wenigstens nahezu geschlossenen Kern (11) hat.1. Ignition system for internal combustion engines with an outgoing circuit from a current source, which contains the primary winding of an ignition coil and an induction coil with a magnetically conductive core lying in series with the primary winding, characterized in that the induction coil (5) has an at least almost closed core (11) .
2. Zündanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Magnetisierungskurve des Kernmaterials wenigstens näherungsweise zunächst eine steile Gerade (a) ist und knickförmig in einen nur noch mäßig ansteigenden Sättigungsverlauf (b) übergeht.2. Ignition system according to claim 1, characterized in that the magnetization curve of the core material is at least approximately initially a steep straight line (a) and merges into an only moderately increasing saturation curve (b).
3. Zündanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kern (11) ungleichmäßigen Querschnitt hat.3. Ignition system according to claim 1 or 2, characterized in that the core (11) has an uneven cross-section.
4. Zündanlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Kern (11) aus lameliiert em Eisenblech besteht. 4. Ignition system according to one of claims 1 to 3, characterized in that the core (11) consists of laminated iron sheet.
EP19860905208 1985-12-24 1986-09-04 Ignition system for internal combustion engines Expired - Lifetime EP0250445B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3546126 1985-12-24
DE19853546126 DE3546126A1 (en) 1985-12-24 1985-12-24 IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

Publications (2)

Publication Number Publication Date
EP0250445A1 true EP0250445A1 (en) 1988-01-07
EP0250445B1 EP0250445B1 (en) 1991-07-17

Family

ID=6289578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860905208 Expired - Lifetime EP0250445B1 (en) 1985-12-24 1986-09-04 Ignition system for internal combustion engines

Country Status (6)

Country Link
EP (1) EP0250445B1 (en)
JP (1) JPS63501808A (en)
AU (1) AU584241B2 (en)
DE (2) DE3546126A1 (en)
ES (1) ES2004001A6 (en)
WO (1) WO1987003999A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688033B1 (en) * 1992-02-27 1995-08-25 Marelli Autronica COIL IGNITION DEVICE.
JPH08273950A (en) * 1995-04-03 1996-10-18 Mitsubishi Electric Corp Ignition coil for internal combustion engine
JP6089780B2 (en) * 2013-02-27 2017-03-08 株式会社デンソー Ignition coil for internal combustion engines

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017591A (en) * 1955-03-23 1962-01-16 Allis Chalmers Mfg Co Stacked magnetic core having magnetization curve with sharp knee
GB1097201A (en) * 1964-03-24 1967-12-29 Nat Res Dev Electrical pulse generator
JPS4824564B1 (en) * 1969-08-22 1973-07-23
DE2338556C2 (en) * 1973-07-30 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart Ignition system for internal combustion engines
DE2623612C3 (en) * 1976-05-26 1979-03-29 Ingo 5000 Koeln Huettl High-voltage capacitor ignition device for internal combustion engines
JPS55151316A (en) * 1979-05-15 1980-11-25 Ikeda Denki Kk Saturation type leakage transformer
JPS5759658U (en) * 1980-09-27 1982-04-08
GB2154068B (en) * 1984-02-07 1987-07-22 Marconi Co Ltd Transformers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8703999A1 *

Also Published As

Publication number Publication date
EP0250445B1 (en) 1991-07-17
ES2004001A6 (en) 1988-12-01
AU6331386A (en) 1987-07-15
DE3680333D1 (en) 1991-08-22
JPS63501808A (en) 1988-07-21
DE3546126A1 (en) 1987-07-02
DE3546126C2 (en) 1989-09-14
AU584241B2 (en) 1989-05-18
WO1987003999A1 (en) 1987-07-02

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