EP1074733A2 - Schaltungsanordnung zur Ansteuerung einer Zündspule - Google Patents
Schaltungsanordnung zur Ansteuerung einer Zündspule Download PDFInfo
- Publication number
- EP1074733A2 EP1074733A2 EP00109567A EP00109567A EP1074733A2 EP 1074733 A2 EP1074733 A2 EP 1074733A2 EP 00109567 A EP00109567 A EP 00109567A EP 00109567 A EP00109567 A EP 00109567A EP 1074733 A2 EP1074733 A2 EP 1074733A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- semiconductor switch
- transistor
- circuit arrangement
- control
- arrangement according
- 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.)
- Withdrawn
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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
- F02P3/0421—Opening or closing the primary coil circuit with electronic switching means with electronic tubes
Definitions
- the present invention relates to a circuit arrangement to control an ignition coil, such as for Generation of ignition sparks is used in Otto engines.
- Such circuit arrangements have a first semiconductor switch with a load path that is in series with a primary winding the ignition coil is switched, and with a control electrode for the control according to a first control signal on.
- the series connection of the first semiconductor switch and primary winding is at terminals for one Power supply connected.
- the time of generation of the spark or opening of the first semiconductor switch becomes the circuit arrangement predefined from the outside depending on the motor data.
- the period between closing and opening the first semiconductor switch can vary.
- the circuit arrangement according to the invention sees one second semiconductor switch in front with a load path that is parallel is connected to the primary winding, and with a Control electrode for the control according to a second Control signal.
- the second semiconductor switch which in particular as Insulated gate bipolar transistor or as a field effect transistor trained, takes over as long as it passes through the second Control signal is kept conductive, the current through the Primary coil when the first semiconductor switch blocks or its conductivity decreases.
- the second semiconductor switch is in the reverse direction between the first semiconductor switch facing terminal of the primary winding and the other terminal of the primary winding is switched and acts like a controlled freewheeling diode. He just heads in Direction between one of the primary winding and the first Semiconductor switch common node and the other terminal the primary winding and locks in the other direction.
- the second semiconductor switch conducts with a positive supply potential then when the first semiconductor switch is blocked the potential at that of the primary winding and the first semiconductor switch common node about the value of a supply potential to which the other terminal of the primary winding connected. Locks next to the first semiconductor switch the second semiconductor switch, too energy previously stored in the primary winding to the secondary coil transferred, and connected to the secondary side Ignition coil causes an ignition spark to be generated.
- the circuit arrangement one to a control electrode of the first Semiconductor switch connected first control circuit to control the first semiconductor switch depending on a current through the primary winding and / or the first Has semiconductor switch.
- This control circuit detects after closing the first semiconductor switch the current through the primary winding and / or the current through the first Semiconductor switch. If this current exceeds a predetermined one Value, the first semiconductor switch is replaced by the first Control circuit opened. The second semiconductor switch takes over then the current from the primary winding until the current has dropped due to line resistance and the first Switches on the semiconductor switch again.
- the flow through the primary winding or the first semiconductor switch is so by alternately switching on and off or alternately Adjustment and adjustment of the first semiconductor switch to one Predeterminable value adjusted, or this current fluctuates around this predeterminable value.
- the control electrodes of the first and second semiconductor switches are preferably to an input terminal of the circuit arrangement connected, which is supplied with a control signal is, according to the generation of the ignition sparks takes place. As long as no spark should be generated the first and second semiconductor switches kept conductive, wherein the first semiconductor switch by the first control circuit to regulate the current through the primary winding temporarily can be locked. The current through the primary winding then to avoid generating a spark from the second semiconductor switch acting as a freewheeling diode accepted until the first semiconductor switch conducts again. If an ignition spark is to be generated, the control signal both semiconductor switches after the primary winding Electricity has been blocked.
- the first control circuit a third semiconductor switch between the control electrode of the first semiconductor switch and a reference potential is connected and which according to a dependent on a current through the first semiconductor switch Current measurement signal is controllable.
- a current sensing resistor is preferably provided, the between a load connection of the first Semiconductor switch and a reference potential is switched, wherein a control electrode of the third semiconductor switch for supplying the current measurement signal to a terminal of the current sensing resistor connected.
- the first and second semiconductor switches are preferably as Transistors, in particular as insulated gate bipolar transistors or as field effect transistors.
- Another embodiment of the invention provides of the current measurement signal is a measurement based on the current sense principle in front.
- another transistor provided the control electrode of the control electrode of the first transistor connected and the one with a first Load path connection to a first load path connection of the first transistor is connected.
- a second load connection the other transistor is the current sensing resistor downstream to provide the current measurement signal.
- second control circuit for driving the first semiconductor switch depending on a temperature in the circuit arrangement having. Exceeds the temperature in the circuit a predetermined value, the first semiconductor switch closed and thus prevents a further rise of the Current through the primary winding.
- the second semiconductor switch takes over the current through the primary winding and prevents so the generation of an ignition spark.
- the second control circuit preferably has a further semiconductor switch on between the control electrode of the first semiconductor switch and the reference potential is switched and the after Provided that one provided by a temperature sensor Temperature signal is controlled.
- the first semiconductor switch is preferably connected to the first and / or second control circuit in a first chip or Semiconductor body integrated during the second semiconductor switch integrated in a second chip or semiconductor body is.
- the two chips are preferably on a common one Carrier, for example a copper block, soldered and housed in a common housing.
- the invention is hereinafter described using transistors explained as a semiconductor switch.
- transistors explained as a semiconductor switch are theirs Gate electrodes the control electrodes, their drain or Source electrodes are the load path connections.
- FIG. 1 A first embodiment of the circuit arrangement according to the invention is shown in FIG. 1.
- the circuit arrangement has an ignition coil with a primary winding L1 and a secondary winding L2, an ignition plug Z being connected in parallel with the secondary winding L2 to generate an ignition spark.
- a first connection terminal of the primary winding L1 is connected to a terminal for supply potential U BB .
- a first semiconductor switch T1 is provided, which in the example is designed as an n-type insulated gate bipolar transistor and is connected to a second terminal of the primary winding L1 with a drain connection.
- the first transistor T1 can be driven in accordance with a first drive signal A1, which is supplied to its gate electrode G.
- the gate electrode G of the first transistor T1 is connected via a resistor R G to an input terminal EK, to which an actuation signal A is supplied, according to which the ignition sparks are generated.
- the resistor R G serves to limit the current to the gate electrode G.
- a load path DS of a second semiconductor switch T2 is connected, which in the exemplary embodiment is designed as an insulated gate bipolar transistor and which can be controlled in accordance with a second control signal A2.
- the gate electrode G of the second transistor T2 is connected directly to the input terminal EK of the circuit arrangement, its source electrode S is connected to the terminal for supply potential U BB , its drain electrode D is connected to the first transistor T1 and Primary winding L1 connected to common node N1.
- a first control circuit T3, R S is provided, which in the exemplary embodiment has a third semiconductor switch T3, which is connected between the control electrode G of the first semiconductor switch T1 and a reference potential M and is designed as an npn bipolar transistor Current measurement signal SI can be controlled, which is dependent on a current through the first semiconductor switch T1.
- a current sensing resistor R S is connected between the source terminal S of the first transistor T1 and the reference potential M, a base terminal B of the transistor T3 being connected to a node common to the resistor R S and the first semiconductor switch T1 .
- a second control circuit T5, TES is used to control the first semiconductor switch T1 depending on a temperature in the circuit arrangement.
- the second control circuit has in the example, another designed as an n-channel FET Semiconductor switch T5, whose load path D-S between the gate electrode G of the first transistor T1 and the reference potential M is switched and which according to one of a temperature signal provided by a temperature sensor TES ST is controllable, the gate electrode G of the n-channel FET T5 connected to a terminal of the temperature sensor TES is.
- the drive signal A assumes an upper signal level, the value of which is chosen for the exemplary embodiment shown in FIG. 1 so that it lies above the value of the supply potential U BB , in order to provide a second transistor T2 apply positive gate-source voltage.
- the resistor R G protects the gate electrode G of the first transistor T1 against an excessive voltage.
- the drain-source voltage U DS between the drain electrode D and the source electrode S of the second transistor T2 is therefore negative. No current flows through the drain-source path DS, as long as the amount of the voltage applied across the second transistor T2 in the reverse direction is less than a breakdown voltage U D of the second semiconductor switch T2, as is the case in the characteristic field of such an insulated gate bipolar transistor 4, and in which the drain-source current I DS is plotted against the drain-source voltage U DS for increasing gate-source voltages.
- the second transistor T2 is selected such that the amount of its breakdown voltage U D is greater than a maximum positive voltage present between the source electrode S and the drain electrode D, in order to ensure that, in the case of a negative drain-source voltage U DS , if the first transistor T1 conducts and the supply potential U BB is greater than the potential at the node N1, the second transistor T2 reliably blocks.
- the potential at the node N1 increases until the drain-source voltage of the second transistor T2 becomes positive and the second transistor T2 has the positive voltage Primary winding L1 flowing current I L1 completely or partially takes over. This prevents the energy stored in the primary winding L1 from being transmitted to the secondary winding L2 in order to generate an ignition spark there.
- the second transistor T2 acts in the manner of a free-wheeling diode, the second transistor T2 only conducting as long as a positive potential is present at its gate electrode, ie as long as the drive signal A assumes an upper signal value.
- the third transistor T3 conducts when the current across the load path DS of the first transistor T1 causes a voltage across the current sensing resistor R F , the value of which corresponds to the value of the base-emitter voltage at which the third transistor T3 conducts.
- the first transistor T1 cuts off, as a result of which the current through the primary winding L1 does not rise any further, the second transistor T2 takes over at least part of the current flowing through the primary winding L1, the voltage across the current sensing resistor R G thereby decreases and the third transistor again begins to lock.
- the current I L1 is regulated to a predeterminable value by the primary winding L1, as a result of which excessive heating of the circuit arrangement is prevented.
- the transistor T4 is activated by the temperature signal ST and thus blocks the first semiconductor switch T1. If the control signal A is at the upper signal level at which no ignition spark is to be generated, the second transistor T2 conducts and takes over the current through the primary winding L1, thereby preventing the generation of an ignition spark. Due to line resistances, the current I L1 through the primary winding L1 or the second semiconductor switch T2 decreases rapidly, so that no ignition spark can be generated even when both semiconductor switches T1, T2 are subsequently closed.
- FIG. 1 Another embodiment of the circuit arrangement according to the invention is shown in FIG.
- a field effect transistor T1 is used there as the first transistor, to which a zener diode D2 is connected in parallel as protection against overvoltage.
- a further field-effect transistor is provided as the measuring transistor T4, the gate electrode G of which is connected to the gate electrode G of the first transistor T1 and the drain electrode D of which is connected to the drain electrode D of the first transistor T1 .
- the transistors T1 and T4 are thereby operated at the same operating point; the ratio of the currents across the load paths DS of these transistors T1, T4 corresponds to their area ratio, the area of the measuring transistor T4 being substantially smaller than that of the first transistor T1 and therefore only absorbing a fraction of the load current of the first transistor T1 as the measuring current.
- the measuring transistor T4 is followed by a current sensing resistor R F for converting the measuring current into a current measuring signal SI for driving the third transistor T3.
- a boot strap circuit is provided in the exemplary embodiment according to FIG. 2, which has a zener diode ZD1 connected between the terminal for supply potential U BB and the gate electrode G of the second transistor T2 and one between the gate electrode G. of the second transistor T2 and the input terminal EK connected capacitance C2, which is preferably a resistor connected in series. If the control signal A assumes a lower signal level, preferably reference potential M, the capacitance C2 is charged to the supply potential U BB via the Zener diode ZD2, the second transistor T2 remains blocked.
- the drive signal A then assumes an upper signal level, the charge on the capacitance C2 is retained and the potential at the gate electrode G of the second transistor T2 rises to the value of the supply potential U BB plus the value of the upper signal level of the drive signal A.
- the second transistor T2 becomes conductive.
- the embodiment with the boot strap circuit has the advantage that no signal which is greater than the supply potential U BB has to be made available as a control signal A at the input terminal EK in order to make the second transistor T2 conductive. In this case, a signal which corresponds to the gate-source voltage at which the second transistor conducts is sufficient as the upper signal level. This signal is also sufficient to make the first transistor T1 conductive.
- the base of the third transistor T3 is in the embodiment a resistor R1 upstream, a capacitor C1 is parallel to the base-emitter path of this transistor T3 switched.
- Figure 3 shows a further embodiment of the invention Circuit arrangement.
- the control of the first transistor T1 by means of the circuit STS can, for example by generating the first drive signal A1 under Taking into account the control signal A, which is at an input the circuit STS is present, the current measurement signal SI and one internally generated temperature signal.
- the second Control signal A2 is also under by the circuit STS Consideration of the control signal A generated.
- first semiconductor switch T1 and those for its control provided control circuits, such as the first and second control circuit in Figures 1 and 2, or the Circuit STS preferably integrated in a first chip CH1.
- the second transistor T2 is in a second chip integrated.
- the two chips CH1, CH2 are preferably on a common carrier, for example a copper block, soldered and housed in a common housing.
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)
Abstract
Description
- Figur 1:
- Erfindungsgemäße Schaltungsanordnung gemäß einer ersten Ausführungsform;
- Figur 2:
- erfindungsgemäße Schaltungsanordnung gemäß einer zweiten Ausführungsform mit einer Strommessung nach dem Strom-Sense-Prinzip;
- Figur 3:
- weitere Ausführungsform einer erfindungsgemäßen Schaltungsanordnung mit Integration des ersten und zweiten Halbleiterschalters in einem ersten und zweiten Chip;
- Figur 4:
- Kennlinienfeld des zweiten Halbleiterschalters.
Claims (12)
- Schaltungsanordnung zur Ansteuerung einer Zündspule, wobei die Schaltungsanordnung folgende Merkmale aufweist:einen ersten Halbleiterschalter (T1) mit einer Laststrecke (D-S), die in Reihe zu einer Primärwicklung (L1) der Zündspule geschaltet ist, und mit einer Steuerelektrode (G) für die Ansteuerung nach Maßgabe eines ersten Ansteuersignals (A1);
gekennzeichnet durch:einen zweiten Halbleiterschalter (T2) mit einer Laststrecke (D-S), die parallel zu der Primärwicklung (L1) geschaltet ist, und mit einer Steuerelektrode (G) für die Ansteuerung nach Maßgabe eines zweiten Ansteuersignals (A2). - Schaltungsanordnung nach Anspruch 1,
dadurch gekennzeichnet, daß
sie eine an die Steuerelektrode (G) des ersten Halbleiterschalters (T1) angeschlossene erste Steuerschaltung (T3, RS; T3, T4, RS, R1, C1) zur Ansteuerung des ersten Halbleiterschalters (T1) abhängig von einem Strom durch die Primärwicklung (L1) und/oder den ersten Halbleiterschalter (T1) aufweist. - Schaltungsanordnung nach Anspruch 2,
dadurch gekennzeichnet, daß
die erste Steuerschaltung einen zwischen die Steuerelektrode (G) des ersten Halbleiterschalters (T1) und ein Bezugspotential (M) geschalteten dritten Halbleiterschalter (T3) aufweist, der nach Maßgabe eines von einem Strom (I) durch den ersten Halbleiterschalter (T1) abhängigen Strommeßsignals (SI) ansteuerbar ist. - Schaltungsanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß
sie einen in Reihe zu dem ersten Halbleiterschalter (T1) geschalteten Stromfühlwiderstand (RS) zur Bereitstellung des Strommeßsignals (SI) aufweist. - Schaltungsanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß
der erste Halbleiterschalter (T1) ein Transistor, insbesondere ein Feldeffekttransistor oder ein Insulated-Gate-Bipolartransistor ist. - Schaltungsanordnung nach Anspruch 5,
dadurch gekennzeichnet, daß
sie einen weiteren Transistor (T4) aufweist mit einer Steuerelektrode (G), die an die Steuerelektrode (G) des ersten Transistors (T1) angeschlossen ist, und einem ersten Laststreckenanschluß (D), der an den Laststreckenanschluß (D) des ersten Transistors (T1) angeschlossen ist, wobei einem zweiten Laststreckenanschluß (S) des weiteren Transistors (T4) ein Stromfühlwiderstand (RS) zur Bereitstellung des Strommeßsignals (SI) nachgeschaltet ist. - Schaltungsanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß
die Steuerelektroden (G) des ersten und zweiten Halbleiterschalters (T1, T2) an eine Eingangsklemme (EK) der Schaltungsanordnung angeschlossen sind. - Schaltungsanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß
sie eine zweite Steuerschaltung (T5, TES; TE) aufweist, die an die Steuerelektrode (G) des ersten Halbleiterschalters (T1) angeschlossen ist, zur Ansteuerung des ersten Halbleiterschalters (T1) abhängig von einer Temperatur in der Schaltungsanordnung. - Schaltungsanordnung nach Anspruch 8,
dadurch gekennzeichnet, daß
die zweite Steuerschaltung (T5, TES; TE) einen zwischen die Steuerelektrode (G) des ersten Halbleiterschalters (T1) und das Bezugspotential (M) geschalteten temperaturabhängigen Schalter (TE) aufweist. - Schaltungsanordnung nach Anspruch 8,
dadurch gekennzeichnet, daß
die zweite Steuerschaltung (T5, TES; TE) einen zwischen die Steuerelektrode (G) des ersten Halbleiterschalters (T) und ein Bezugspotential (M) geschalteten Halbleiterschalter (T5) aufweist, wobei ein Temperatursensor (TS) an eine Steuerelektrode (G) des Halbleiterschalters (T5) angeschlossen ist. - Schaltungsanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß
der erste Halbleiterschalter (T1) mit der ersten und/oder zweiten Steuerschaltung in einem ersten Chip (CH1) integriert ist und daß der zweite Halbleiterschalter in einem zweiten Chip (CH2) integriert ist. - Schaltungsanordnung nach Anspruch 11,
dadurch gekennzeichnet, daß
die Chips (CH1, CH2) auf einen gemeinsamen Träger, vorzugsweise einen Kupferblock, aufgelötet und in einem gemeinsamen Gehäuse untergebracht sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19937055 | 1999-08-05 | ||
DE19937055 | 1999-08-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1074733A2 true EP1074733A2 (de) | 2001-02-07 |
EP1074733A3 EP1074733A3 (de) | 2002-09-25 |
Family
ID=7917377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00109567A Withdrawn EP1074733A3 (de) | 1999-08-05 | 2000-05-04 | Schaltungsanordnung zur Ansteuerung einer Zündspule |
Country Status (2)
Country | Link |
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US (1) | US6310331B1 (de) |
EP (1) | EP1074733A3 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9000712L (sv) * | 1990-02-28 | 1991-08-29 | Alfa Laval Thermal | Permanent sammanfogad plattvaermevaexlare |
ITMI20120893A1 (it) * | 2012-05-23 | 2013-11-24 | St Microelectronics Srl | Sistema di accensione elettronica per il motore di un veicolo in caso di guasto |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196711A (en) * | 1977-01-21 | 1980-04-08 | Robert Bosch Gmbh | Ignition system with ignition coil primary current control |
GB2163213A (en) * | 1984-06-29 | 1986-02-19 | Bosch Gmbh Robert | Ignition systems for internal combustion engines |
DE3437155A1 (de) * | 1984-10-10 | 1986-04-17 | Robert Bosch Gmbh, 7000 Stuttgart | Schalteinrichtung zur schaltung des stromes durch eine induktive last |
JPS6251756A (ja) * | 1985-08-30 | 1987-03-06 | Hitachi Ltd | 内燃機関の点火装置 |
JPH02136563A (ja) * | 1988-11-17 | 1990-05-25 | Hitachi Ltd | 半導体スイッチング回路 |
EP0757177A2 (de) * | 1995-08-04 | 1997-02-05 | Hitachi, Ltd. | Zündsystem für Brennkraftmaschine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4897528A (en) * | 1988-03-21 | 1990-01-30 | Anthony Frank H | Kiln with contaminant after-burner |
US5321231A (en) * | 1992-01-24 | 1994-06-14 | General Motors Corporation | System for supplying power to an electrically heated catalyst |
US5463874A (en) * | 1993-10-04 | 1995-11-07 | Tecumseh Products Company | Inductively activated control and protection circuit for refrigeration systems |
US6166927A (en) * | 1999-07-23 | 2000-12-26 | Ericsson Inc. | Push-pull power converter circuit |
-
2000
- 2000-05-04 EP EP00109567A patent/EP1074733A3/de not_active Withdrawn
- 2000-08-07 US US09/633,708 patent/US6310331B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196711A (en) * | 1977-01-21 | 1980-04-08 | Robert Bosch Gmbh | Ignition system with ignition coil primary current control |
GB2163213A (en) * | 1984-06-29 | 1986-02-19 | Bosch Gmbh Robert | Ignition systems for internal combustion engines |
DE3437155A1 (de) * | 1984-10-10 | 1986-04-17 | Robert Bosch Gmbh, 7000 Stuttgart | Schalteinrichtung zur schaltung des stromes durch eine induktive last |
JPS6251756A (ja) * | 1985-08-30 | 1987-03-06 | Hitachi Ltd | 内燃機関の点火装置 |
JPH02136563A (ja) * | 1988-11-17 | 1990-05-25 | Hitachi Ltd | 半導体スイッチング回路 |
EP0757177A2 (de) * | 1995-08-04 | 1997-02-05 | Hitachi, Ltd. | Zündsystem für Brennkraftmaschine |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 238 (M-613), 5. August 1987 (1987-08-05) & JP 62 051756 A (HITACHI LTD), 6. März 1987 (1987-03-06) * |
PATENT ABSTRACTS OF JAPAN vol. 014, no. 375 (M-1010), 14. August 1990 (1990-08-14) & JP 02 136563 A (HITACHI LTD;OTHERS: 02), 25. Mai 1990 (1990-05-25) * |
Also Published As
Publication number | Publication date |
---|---|
US6310331B1 (en) | 2001-10-30 |
EP1074733A3 (de) | 2002-09-25 |
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