EP0632199B1 - Verfahren zum Ansteuern einer Zündspule - Google Patents
Verfahren zum Ansteuern einer Zündspule Download PDFInfo
- Publication number
- EP0632199B1 EP0632199B1 EP94110260A EP94110260A EP0632199B1 EP 0632199 B1 EP0632199 B1 EP 0632199B1 EP 94110260 A EP94110260 A EP 94110260A EP 94110260 A EP94110260 A EP 94110260A EP 0632199 B1 EP0632199 B1 EP 0632199B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- current
- pulse
- coil
- additional control
- 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
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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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
-
- 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
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
- F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
Definitions
- the invention relates to a method for controlling an ignition coil the preamble of claim 1 and a circuit for performing the Procedure.
- Electronic ignition systems generally consist of a control unit, an ignition output stage and the ignition coil with spark plug.
- the control unit transmits to the ignition output stage whether they are loading or igniting the ignition coil should.
- the ignition output stage loads the ignition coil up to a predetermined one Ignition current and keeps it constant until the ignition request, then discharges the ignition coil over the spark plug.
- ignition current and burning time are very large chosen. Because such a large ignition energy is not when the engine is warmed up is necessary, the life of spark plugs is reduced.
- a generic method is known from DE-A-28 10 665. There is an additional impulse sent the actual ignition pulse ahead and combined with it and extended the actual ignition pulse in a corresponding manner.
- the disadvantage of the method is in that the current through the ignition coil cannot be deliberately limited.
- the invention is based on the object of a method for actuation to design an ignition coil according to the preamble of claim 1 so that the control signals safely without additional effort on cables are transmitted and the ignition energy in accordance with the control signal is adjustable.
- the invention which works with purely digital levels, uses the The fact that the signals relating to the normal ignition sequence (load and ignite), not fall below certain time ranges. So z. B. the minimal loading time for ignition coils at high engine speeds around 3 ms.
- the Loading time of the ignition coil by a control signal in the control unit further impulse added.
- Extra signal E which transmit the information "increase ignition current" should.
- the ignition stage can register this pulse and at Provide the appropriate ignition energy.
- the "Ignition" function suppresses the falling edge of pulse E because E with a duration of approx. 0.1 ms by itself no ignition request represents.
- a larger ignition energy such as it is required, for example, for a cold start, in the form of a Ignition current increase provided.
- Fig. 2 are three firing cycles with their control signals N1, N2, E and N3 shown.
- the first two control signals N1 and N2 request one normal ignition current on, the ignition current should increase in the third cycle become.
- An ignition current increase is communicated to the ignition output stage 2 by the Control signal St is analyzed at the beginning of the loading process (Fig. 2, third cycle).
- the ignition output stage then limits the for one cycle Ignition current only from a higher threshold, the higher Ignition current. From this maximum, the coil current is limited.
- Fig. 5 shows the current through the ignition coil. With the beginning of each cycle increases the current continues until the desired ignition current is reached. The The ignition output stage then keeps the current constant until the ignition occurs.
- Fig. 6 shows one way in which the two signals from the Let control signal St win.
- the Monoflop 5 covers together with the OR circuit 6 the pulse E and thus forms the signal SL "coil load ". If an impulse E im occurs within the 0.7 ms of the monoflop Control signal St on (AND circuit 7), the flip-flop 8 for the Charging time set and indicates at its output that the ignition current should be increased. The flip-flop 8 is reset after the ignition ("Load coil” becomes "low”).
- the power transistor TR which drives the ignition coil 3 is implemented in this case as a “sense FET”.
- a small sensor current proportional to the ignition coil current can be tapped at its additional output.
- This sensor current is compared via the resistors R1 and OP1 with a reference current I ref in order to recognize whether the ignition current has already been reached.
- the reference current "I ref small” (I ref1 ) or "I ref large” (I ref1 + I ref2 ) can be switched via a semiconductor switch S1 .
- S1 is driven by the flip-flop in FIG. 6. When the switch is closed, the ignition current is increased.
- R2, C and OP2 form an inverting integrator.
- the Output voltage from OP2 is slowly lowered or increased, depending after the comparator OP1 exceeds or falls below the desired ignition current. If the ignition coil is to be loaded, switch S2 is in the position shown: the output of the Integrators OP2 is connected to the Power transistor switched.
- the input of the voltage follower is switched on via switch S2 pulled to ground (the OR gate of Fig. 6 controls the Semiconductor switch S2).
- the power transistor then interrupts the primary-side ignition coil current and on the secondary side of the ignition coil a spark is triggered in the spark plug.
- control unit 1 variable advance of the additional control pulse E compared to the normal ignition pulse N3 generated and from the ignition output stage 2 Control signal St recovered and decoded. For example, by a clock generator the time interval between the two signals E, N3 measured that the pulses generated by it on a gate circuit get a counter.
- the counter content is then proportional to the increase in the coil current St.
- the signal "increase ignition current” ZE then does not consist of a single one Impulse, but from one of the sequence of the gate circuit passed counts.
- this signal can also be used a proportional time signal can be obtained, which ultimately the duration of the spark plug according to the required ignition energy is controlled. This is done by short-circuiting the primary side of the Ignition coil 3, the energy stored in the ignition coil via a Free-wheeling diode is dissipated in a resistor.
- the normal ignition pulse can have the burning time and / or the maximum Size of the ignition current also depends on the width of the additional Control pulse E can be determined. Determining the width of the transmitted pulse happens again in the ignition output stage analog to the procedure described above. So it is also thought of when increased Ignition energy the burning time of the candle with the maximum size of the Increase ignition current together.
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
- Fig. 1
- das Steuergerät mit Zündendstufe, Zündspule und Zündkerze;
- Fig. 2
- drei Zündzyklen mit zugehörigen Steuersignalen;
- Fig. 3
- die Signale für die Beladung der Spule;
- Fig. 4
- das Signal für die Erhöhung des Zündstroms;
- Fig. 5
- den Stromverlauf in der Zündspule;
- Fig. 6
- die Erzeugung der Signale "Spule beladen" und "Zündstrom erhöhen" und
- Fig. 7
- das Schaltbild Ansteuerung der Zündspule.
Claims (7)
- Verfahren zur Änderung der Zündenergie einer Zündspule mit einer angeschlossenen Stromüberwachung, bei dem Zündimpulse von einem Steuergerät zur einer Zündendstufe übertragen werden,
dadurch gekennzeichnet,
daß zwischen zwei von einem Steuergerät erzeugte Zündimpulse ein zusätzlicher Steuerimpuls (E) eingefügt wird, und daß abhängig von diesem zusätzlichen Steuerimpuls (E) ein Zündstrombegrenzer auf einen vorgegebenen erhöhten Wert des Zündstroms für die Zündspule umgeschaltet wird oder die Brenndauer der Zündkerze beeinflußt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zündendstufe (2) den zusätzlichen Steuerimpuls (E) und den zugehörigen Zündimpuls (N3) zu einem einheitlichen Impuls (N3') umformt. - Verfahren nach einem der Ansprüche 1 bis 2,
dadurch gekennzeichnet,
daß die maximale Größe des Zündstroms und/oder die Brenndauer durch die Voreilzeit der ansteigenden Flanke des zusätzlichen Steuerimpulses (E) gegenüber dem normalen Zündimpuls (N3) bestimmt wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Brenndauer und/oder die Größe des Zündstroms durch die Breite des zusätzlichen Steuerimpulses (E) bestimmt wird. - Verfahren nach Anspruch 2,
dadurch gekennzeichnet,
daß aufgrund der Kürze des zusätzlichen Steuerimpulses (E) mit dem Impuls eines Monoflops (5) festgestellt wird, daß der kein normaler Zündimpuls ist, und infolgedessen kein Zündvorgang ausgelöst wird. - Schaltungsanordnung zur Durchführung des Verfahrens nach Anspruch 1,
dadurch gekennzeichnet,
daß ein Steuergerät (1), welches Motorkennziffern wie Temperatur und Winkellage der Kurbelwelle als Eingangsgröße erhält, ein davon abgeleitetes, zusätzliches Steuersignal (E) Zurischen zwei Zündimpulse eingefügt und auf eine Zündendstufe (2) gibt, dessen ansteigende Flanke ein Monoflop (5) anstößt, dessen Impuls zusammen mit dem Steuersignal sowohl auf ein UND-Glied (7) als auch auf ein ODER-Glied (6) gegeben wird, dessen Ausgang als Signal zum Beladen der Spule dient und zum Rücksetzen eines Flipflops (8), welches durch das UND-Glied (7) gesetzt, das Signal zum Erhöhen des Zündstroms gibt. - Schaltungsanordnung nach Anspruch 6,
dadurch gekennzeichnet,
daß das Signal "Zündstrom erhöhen" mittels eines Schalters (S1) zur Erhöhung der Eingangsspannung eines ersten Operationsverstärkers (OP1) dient, welcher über einen weiteren Operationsverstärker (OP2), welcher als Integrator geschaltet ist, den Zündstrom in der Zündspule (3) dadurch erhöht, daß über einen Spannungsfolger und einen Leistungstransistor (TR) der Strom in der Primärwicklung der Zündspule (3) ansteigt, und daß der Ausgang der ODER-Stufe (6) "Spule beladen" an einen Halbleiterschalter (S2) am Eingang des dritten Operationsverstärkers (OP3) so lange geschlossen ist, so lange die Zündspule (3) zu laden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4322014 | 1993-07-02 | ||
DE4322014A DE4322014C2 (de) | 1993-07-02 | 1993-07-02 | Verfahren zum Ansteuern einer Zündspule einer Zündeinrichtung für Brennkraftmaschinen und Schaltungsanordnung zur Durchführung des Verfahrens |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0632199A2 EP0632199A2 (de) | 1995-01-04 |
EP0632199A3 EP0632199A3 (de) | 1995-07-19 |
EP0632199B1 true EP0632199B1 (de) | 2000-02-02 |
Family
ID=6491769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94110260A Expired - Lifetime EP0632199B1 (de) | 1993-07-02 | 1994-07-01 | Verfahren zum Ansteuern einer Zündspule |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0632199B1 (de) |
DE (2) | DE4322014C2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4419499A1 (de) | 1994-06-03 | 1995-12-07 | Interoc Vertriebsgesellschaft | Hydraulisches Schlaggerät mit stufenlos regelbarer Schlagzahl und Schlagenergie |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2810665A1 (de) * | 1978-03-11 | 1979-09-20 | Bosch Gmbh Robert | Zuendanlage fuer brennkraftmaschinen |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55122475A (en) * | 1979-03-15 | 1980-09-20 | Nec Corp | Pulse-current control circuit |
JPS59110861A (ja) * | 1982-12-16 | 1984-06-26 | Mitsubishi Electric Corp | 内燃機関点火装置 |
JPS59171219A (ja) * | 1983-03-17 | 1984-09-27 | Nec Corp | レベル検出回路 |
DE3800932A1 (de) * | 1988-01-15 | 1989-07-27 | Telefunken Electronic Gmbh | Schliesszeitregelung fuer brennkraftmaschinen mit ausgelagerter zuendendstufe |
JPH06105070B2 (ja) * | 1988-11-17 | 1994-12-21 | 株式会社日立製作所 | 半導体スイッチング回路 |
DE4007774A1 (de) * | 1990-03-12 | 1991-09-19 | Telefunken Electronic Gmbh | Zuendanlage fuer viertakt-brennkraftmaschinen |
DE4038440C2 (de) * | 1990-12-01 | 1994-09-22 | Telefunken Microelectron | Elektronisches Zündsystem für Brennkraftmaschinen |
DE4236397A1 (en) * | 1991-11-09 | 1993-05-13 | Volkswagen Ag | Electronic ignition for automobile IC engine - uses controller supplying regulating current for end stage transistor in ignition module providing ignition coil current |
JPH06131661A (ja) * | 1992-10-15 | 1994-05-13 | Kao Corp | 磁気記録媒体の製造方法及び装置 |
-
1993
- 1993-07-02 DE DE4322014A patent/DE4322014C2/de not_active Expired - Fee Related
-
1994
- 1994-07-01 DE DE59409116T patent/DE59409116D1/de not_active Expired - Fee Related
- 1994-07-01 EP EP94110260A patent/EP0632199B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2810665A1 (de) * | 1978-03-11 | 1979-09-20 | Bosch Gmbh Robert | Zuendanlage fuer brennkraftmaschinen |
Also Published As
Publication number | Publication date |
---|---|
EP0632199A2 (de) | 1995-01-04 |
DE59409116D1 (de) | 2000-03-09 |
EP0632199A3 (de) | 1995-07-19 |
DE4322014C2 (de) | 1995-06-22 |
DE4322014A1 (de) | 1995-01-19 |
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