EP0906510B1 - Schema pour un etage d'allumage, notamment pour le circuit d'allumage d'un vehicule a moteur - Google Patents

Schema pour un etage d'allumage, notamment pour le circuit d'allumage d'un vehicule a moteur Download PDF

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Publication number
EP0906510B1
EP0906510B1 EP97930320A EP97930320A EP0906510B1 EP 0906510 B1 EP0906510 B1 EP 0906510B1 EP 97930320 A EP97930320 A EP 97930320A EP 97930320 A EP97930320 A EP 97930320A EP 0906510 B1 EP0906510 B1 EP 0906510B1
Authority
EP
European Patent Office
Prior art keywords
transistor
circuit arrangement
darlington
base
ignition
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
Application number
EP97930320A
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German (de)
English (en)
Other versions
EP0906510A1 (fr
Inventor
Manfred ÜBELE
Horst Meinders
Ning Qu
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.)
Robert Bosch GmbH
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 EP0906510A1 publication Critical patent/EP0906510A1/fr
Application granted granted Critical
Publication of EP0906510B1 publication Critical patent/EP0906510B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
    • F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
    • F02P3/0442—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices using digital techniques
    • 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
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices

Definitions

  • the invention relates to a circuit arrangement of a Ignition output stage, in particular for an ignition circuit of a motor vehicle, with the in the preamble of the claim 1 mentioned features.
  • Darlington Darlington transistor stages
  • a primary winding of an ignition coil drive Depending on whether the primary winding via the collector of the Darlington (low-side) or the Darlington (high-side) emitters can be controlled, is in a low-side ignition or a high-side ignition distinguished.
  • An inductive ignition system is known from US Pat. No. 4,738,239 to be provided for an internal combustion engine.
  • an N-channel field effect transistor in series with a primary winding one Ignition coil connected.
  • An npn transistor is with its Collector emitter circuit between the gate and the source of the Field effect transistor connected.
  • the present invention is based on the object thermal coupling of the ignition output stage to a ground to simplify connected heat sinks.
  • control circuit according to the invention with the in claim 1 features mentioned has the advantage that the Control circuit from one when the Darlington is switched off whose base applied negative reverse voltage decoupled can be and at the same time an integration of the Decoupling element with which Darlington can be realized.
  • an NPN Darlington is provided, the collector of which with the Positive pole of a voltage source and its emitter with the first Connection of the primary winding of the ignition coil is connected, wherein the second connection of the primary winding to ground and the The Darlington is controlled via a decoupling element, it is advantageously possible, in particular, through the the possibility of integrating the circuit arrangement Darlington, the decoupling element and the entire Control circuit, in a monolithically integrated component one easy to manufacture and one inexpensive To enable assembly of the entire ignition stage.
  • the control circuit according to the invention draws is also characterized by high reliability the ignition stage for those that occur in extreme operation thermal loads.
  • FIG. 1 shows the circuit arrangement 10 of an ignition output stage an internal combustion engine.
  • Figure 1 is only one ignition stage shown, depending on A corresponding number of cylinders of the internal combustion engine Number of ignition output stages are provided.
  • the output signal of an engine control indicated here is present at an input connection 12.
  • the connection 12 is connected via a resistor R 1 to the base of a double Darlington T 1 .
  • a lying between the resistor R1 and the base of transistor T 1 node K 1 is the one hand, connected via a resistor R2 and a Zener diode D 1 to the positive terminal 14 of a voltage source / for example a motor vehicle battery.
  • the node K 1 is connected to the collector of a transistor T 2 , the emitter of which is connected to ground and the base of which is connected via a resistor R 3 to the node K 1 and the collector of a further transistor T 3 .
  • the emitter of transistor T 3 is grounded, and the base of transistor T 3 is connected to input terminal 12.
  • the node K 1 is also connected to ground via a series connection of diodes D 2 and D 3 and a resistor R 4 .
  • the collector of transistor T 1 is connected to the base of a lateral pnp transistor T 4 .
  • the emitter of transistor T 1 is connected to ground.
  • the emitter of the transistor T 4 is connected to the positive pole 1 4
  • the collector of the transistor T 4 is connected to the base of a triple Darlington T 5 .
  • the collector of the Darlington T 5 is connected to the positive pole 14.
  • a Zener diode D 4 is located in the base collector section of the Darlington T 5 .
  • the emitter of Darlington T 5 is connected to one terminal of a primary winding 16 of an ignition coil 18, the other terminal of which is connected to ground.
  • the emitter of Darlington T 5 is connected to the emitter of a further transistor T 6 , the collector of which is connected to the base of Darlington T 5 .
  • the base of the transistor T 6 is connected to the positive pole 14 via a resistor R 5 and a Zener diode D 5 .
  • a control signal is provided by the engine electronics and is intended to trigger the ignition of a spark plug of a motor vehicle connected to the circuit arrangement 10.
  • the resistor R 1 is a high-resistance resistor with, for example, 500 to 1000 ohms and serves as an interference suppression resistor to avoid incorrect triggering of the transistor T 1 . Its base becomes insensitive to rapid voltage peaks due to the resistor R 1 .
  • the transistor T 1 the positive drive signal at the input terminal 12 is converted into an inverted signal which is used to drive the transistor T 4 , that is to say that the latter is switched on.
  • the Darlington T 5 which drives the ignition coil 18 is switched on.
  • the ignition coil 18 is thus controlled via the switching chain of the transistors T 1 , T 4 and T 5 depending on the presence of a positive input signal.
  • a reclosure lock occurs via the transistor T 6 connected to the base-emitter path of the Darlington T 5 and the series connection of the resistor R 5 and the Zener diode D 5 connecting the base thereof to the positive pole 14.
  • the base and the emitter of the Darlington T 5 are short-circuited via the transistor T 6 .
  • the lateral pnp transistor T 4 forms a coupling element which decouples the control circuit shown on the left in FIG. 1 from the Darlington T 5 when it is switched off.
  • the series connection of the diodes D 2 , D 3 and the resistor R 4 forms a current mirror with which the collector current of the transistor T 1 is set and limited.
  • the diodes D 2 and D 3 are switched in the forward direction, that is, their anodes are connected to the base of the transistor T 1 .
  • the collector current of the transistor T 1 is set to a value dependent on the resistance R 4 , for example 100 mA.
  • the series connection of the Zener diode D 1 and the resistor R 2 serves to protect the circuit arrangement 10 against overvoltages in the voltage supply network. If an overvoltage (load dump) occurs in the voltage supply network, the value of which is greater than the breakdown voltage of the Zener diode D 1 , this is derived.
  • the circuit of the transistors T 2 and T 3 and the resistor R 3 connected to the node K 1 at the same time form a logic circuit which, depending on the presence of a positive control signal at the input connection 12, either the current caused by the overvoltage (load dump current) in the base of transistor T 1 or against ground.
  • the transistor T 2 is turned on , so that the load dump current can be diverted to ground via the node K 1 and the transistor T 2 .
  • the load dump current is derived via the node K 1 into the base of the transistor T 1 .
  • FIG. 2 partially shows the layout of the circuit arrangement 10 shown in FIG. 1, by means of which the integration of the Darlington T 5 and the decoupling transistor T 4 in a monolithically integrated component is to be clarified.
  • FIG. 2 shows sections of a wafer 20.
  • the wafer 20 consists of an n-substrate 22 with an n - -doping.
  • a region 24 with p-doping is structured in the n-substrate 22.
  • the region 24 forms the base of the Darlington T 5 and at the same time the collector of the decoupling transistor T 4 .
  • the base of the Darlington T 5 is partially overlapped by a cover electrode 26 which is connected to the positive pole 14 shown in FIG. 1 via an n + contact strip 28.
  • the cover electrode 26 thus forms the collector of the Darlington T 5 .
  • a further region 30 with p-doping is structured in the wafer 20.
  • the region 30 is structured outside the region of the cover electrode 26 on the side facing away from the p-doped region 24.
  • the region 30 forms the emitter of the decoupling transistor T 4, while the n-substrate 22 between the regions 24 and 30 forms the base of the transistor T. 4
  • a lateral pnp transistor T 4 is thus created, which is integrated in the edge region of the Darlington T 5 .
  • the area 30 is encompassed on three sides by an n + ring 32, which is likewise contacted with the positive pole 14 shown in FIG. 1.
  • the area 30 is encompassed by a conductor track 34 which is in contact with the n + contact strip 28.
  • the contact can be made, for example, via contact windows 36 indicated here on both sides of area 30.
  • the conductor track 34 leads to the collector of the transistor T 1, which is no longer shown in the detail in FIG. 2.
  • the area 30 is provided with a wedge-shaped structure 38 directed in the direction of the n + contact strip 28.
  • transistors T 4 and T 5 are implemented as follows using the layout shown in FIG. 2:
  • the potential of the n-substrate 22 between the regions 24 and 30 must be brought to a lower voltage than the supply voltage (14 volts) applied to the n + contact strip 28.
  • the base current of the lateral transistor T 4 is fed from the transistor T 1 arranged outside the high-blocking region of the Darlington T 5 .
  • the n + region between the regions 24 and 30 is drawn to a more negative potential than the entire substrate 22.
  • the transistor T 4 the emitter of the region 30, the collector of which Area 24 and the base of which is the substrate 22 lying between these areas is thus controlled.
  • the wedge-shaped structure 38 of the area 30 ensures that in a zone between the two contact windows 36 in the middle with a lower potential drop, a compensation takes place compared to the zones in the direction of the contact window 36 with a higher potential drop. It is thus achieved that a more uniform lateral current can flow between the regions 30 and 24 and thus an improvement in the gain is achieved.
  • the distance between the areas 30 and 24 must have a minimum distance due to the expansion of the space charge zone in the blocking operation of the Darlington T 5 .
  • this is advantageously at least 55 ⁇ m. This results in a current gain of the lateral transistor T 4 of 0.1.
  • a drive current for the Darlington T 5 via the locking edge structure of Darlington T 5 can be brought without disturbing the blocking behavior of Darlington T 5 in the shut-off case. Due to the current gain of approx. 0.1, a drive current for the Darlington T 5 of approx. 10 mA can be generated with a collector current of the inverting transistor T 1 of approx. 100 mA. The Darlington T 5 can be operated with approx. 10 A.
  • the further circuit elements of the circuit arrangement 10 explained in FIG. 1 and not shown in FIG. 2 can be arranged on the wafer 20 outside the area encompassed by the cover electrode 26.
  • a divider resistor of the cover electrode 26 can very advantageously also serve as a current limiting resistor R 5 for the short-circuit transistor T 6 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (9)

  1. Circuit d'un étage de puissance d'allumage pour un véhicule automobile comportant un transistor commandant le primaire d'une bobine d'allumage dont le collecteur est relié au pôle plus (14) d'une source de tension, et son émetteur à une première extrémité du primaire (16) de la bobine d'allumage (18), la seconde extrémité du primaire (16) étant reliée à la masse, alors que la base du transistor est reliée à un circuit de commande par l'intermédiaire d'un élément de découplage,
    caractérisé en ce que
    le transistor (T5) est un transistor Darlington npn et
    l'élément de découplage est un transistor pnp latéral (T4) dont le collecteur est relié à la base du transistor Darlington (T5), l'émetteur est relié au pôle positif (14) de la source de tension et la base est commandée par le circuit de commande.
  2. Circuit selon la revendication 1,
    caractérisé en ce que
    le circuit de commande comprend un transistor (T1) dont le collecteur est relié à la base du transistor pnp (T4), son émetteur est relié à la masse et sa base est commandée par un signal de commande déclenchant l'allumage.
  3. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le transistor npn Darlington (T5) et le transistor pnp latéral (T4) sont intégrés de manière monolithique dans une plaquette (20).
  4. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    une zone (24) à dopage p d'un substrat n (22) est en même temps la base du transistor Darlington (T5) et le collecteur du transistor (T4).
  5. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    une autre zone (30) à dopage p est prévue à une certaine distance de la zone (24) et forme l'émetteur du transistor (T4) ainsi qu'un segment de substrat (22) de type n entre les zones (24, 30) est délimité par une bande de contact (28) n+, formant la base du transistor (T4).
  6. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la bande de contact (28) de type n+ est en contact avec une électrode de recouvrement (26) installée au-dessus du substrat (22) de type n et située entre les zones à dopage p (24, 30).
  7. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le côté non tourné vers la bande de contact n+, (28) de la zone (30) à dopage p est entourée par un anneau n+, (32), cet anneau étant relié au pôle plus (14).
  8. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la zone (30) est entourée d'un autre chemin conducteur (34) en contact avec la bande de contact n+, (28) sur les deux côtés de la zone (30).
  9. Circuit selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la zone (30) présente une structure en forme de coin (38), dirigée dans la direction de la bande de contact n+, (28).
EP97930320A 1996-06-20 1997-06-16 Schema pour un etage d'allumage, notamment pour le circuit d'allumage d'un vehicule a moteur Expired - Lifetime EP0906510B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19624530 1996-06-20
DE19624530A DE19624530A1 (de) 1996-06-20 1996-06-20 Schaltungsanordnung einer Zündendstufe, insbesondere für eine Zündschaltung eines Kraftfahrzeugs
PCT/DE1997/001211 WO1997048904A1 (fr) 1996-06-20 1997-06-16 Circuiterie pour un etage d'allumage, notamment pour le circuit d'allumage d'un vehicule a moteur

Publications (2)

Publication Number Publication Date
EP0906510A1 EP0906510A1 (fr) 1999-04-07
EP0906510B1 true EP0906510B1 (fr) 2002-12-18

Family

ID=7797414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97930320A Expired - Lifetime EP0906510B1 (fr) 1996-06-20 1997-06-16 Schema pour un etage d'allumage, notamment pour le circuit d'allumage d'un vehicule a moteur

Country Status (6)

Country Link
US (1) US6167876B1 (fr)
EP (1) EP0906510B1 (fr)
JP (1) JP2000512357A (fr)
BR (1) BR9709813A (fr)
DE (2) DE19624530A1 (fr)
WO (1) WO1997048904A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1560936A (en) * 1975-07-31 1980-02-13 Lucas Industries Ltd Spark ignition system for an internal combustion engine
DE3137550A1 (de) 1981-09-22 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart Zuendanlage fuer brennkraftmaschinen
DE3325275A1 (de) 1983-07-13 1985-01-24 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur zuendung von brennkraftmaschinen
US4738239A (en) * 1987-07-31 1988-04-19 Delco Electronics Corporation Ignition system
DE3735631A1 (de) * 1987-10-21 1989-05-03 Bosch Gmbh Robert Zuendeinrichtung fuer eine brennkraftmaschine
US5529046A (en) * 1995-01-06 1996-06-25 Xerox Corporation High voltage ignition control apparatus for an internal combustion engine
JP3216966B2 (ja) * 1995-04-04 2001-10-09 三菱電機株式会社 内燃機関用点火装置
DE19652267A1 (de) * 1996-12-16 1998-06-18 Bosch Gmbh Robert Induktives Spulenzündsystem für einen Motor

Also Published As

Publication number Publication date
DE19624530A1 (de) 1998-01-02
EP0906510A1 (fr) 1999-04-07
US6167876B1 (en) 2001-01-02
JP2000512357A (ja) 2000-09-19
WO1997048904A1 (fr) 1997-12-24
DE59709017D1 (de) 2003-01-30
BR9709813A (pt) 1999-08-10

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