EP0069888B1 - Elektronisch geregeltes Zündsystem - Google Patents

Elektronisch geregeltes Zündsystem Download PDF

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Publication number
EP0069888B1
EP0069888B1 EP82105517A EP82105517A EP0069888B1 EP 0069888 B1 EP0069888 B1 EP 0069888B1 EP 82105517 A EP82105517 A EP 82105517A EP 82105517 A EP82105517 A EP 82105517A EP 0069888 B1 EP0069888 B1 EP 0069888B1
Authority
EP
European Patent Office
Prior art keywords
pulse
ignition
trigger
primary current
electronically controlled
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
Application number
EP82105517A
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German (de)
English (en)
French (fr)
Other versions
EP0069888A3 (en
EP0069888A2 (de
Inventor
Willy Minner
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.)
Telefunken Electronic GmbH
Original Assignee
Telefunken Electronic GmbH
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Filing date
Publication date
Application filed by Telefunken Electronic GmbH filed Critical Telefunken Electronic GmbH
Publication of EP0069888A2 publication Critical patent/EP0069888A2/de
Publication of EP0069888A3 publication Critical patent/EP0069888A3/de
Application granted granted Critical
Publication of EP0069888B1 publication Critical patent/EP0069888B1/de
Expired 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
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines

Definitions

  • the invention relates to an electronically controlled ignition system in which the time of use of the primary current (Ip r ) flowing through the primary winding of the ignition coil is regulated in a speed-dependent manner such that this current only reaches the value (Ip rmax ) required for the ignition shortly before the time of ignition and at which is determined immediately before the ignition point, whether the primary current has reached the value required for the ignition by deriving a test pulse (U te ) from the residence time (t e ) of the primary current in the value (Ip rmax ) required for the ignition If the primary current is not available or is not sufficiently large to avoid misfires (ZA), the electronic control is switched off for a defined period of time and the time of use of the primary current is derived directly from the control signal (U IN ) of the ignition pulse generator, and the electronically controlled control state continuously after the end of the switch-off period and automatically is brought about again.
  • ZA misfires
  • a test pulse of the duration t e is obtained from the dwell time of the primary current in its value required for the ignition.
  • a switch is actuated, via which a capacitor, which is charged when there are no t e pulses, is discharged again.
  • This comparison voltage is compared with the capacitor voltage at a comparator, at whose output a signal only occurs if the capacitor voltage is above the comparison voltage during an existing trigger pulse.
  • the trigger pulse with which the comparator is activated is obtained from the negative switch-off edge of the control signal when this control signal of the ignition pulse generator goes from its high level to the low level.
  • An output signal on the comparator for example, converts a monostable multivibrator from its stable state to the quasi-stable state, so that during the period in which this monostable multivibrator remains in its quasi-stable state, the electronic control is switched off and the instant of use of the primary current through the ignition coil is direct is derived from the control signal of the ignition pulse generator.
  • the switch-off period has ended, the electronically controlled control state is continuously and automatically restored in the manner described in the patent application mentioned.
  • the present invention is based on the object of further improving the known circuit and, in particular, of specifying a circuit which contains small capacitors which are capable of integration.
  • This object is achieved in an electronically controlled ignition system of the type described in the introduction in that the test pulse with an integration stage is extended by a time interval and the extended pulse is fed to a first input of a logic circuit (G 1 ) in that a second input of the logic circuit is switched off the switch-off edge of the control signal derived trigger pulse is supplied, and that the logic is selected so that an output pulse which triggers the switch-off of the electronic control only occurs when there is no pulse supplied by the integration stage during the trigger pulse.
  • the voltage comparator used there is thus replaced by a logic circuit compared to the circuit arrangement already proposed, which is supplied with the trigger pulse and an extended test pulse.
  • the integration stage now provided contains a capacitor, but this capacitor is considerably smaller than the capacitor of the circuit previously proposed, which was discharged in each case by the test pulses t e . This makes it possible to fully integrate the capacitors contained in the newly proposed circuit with integrated semiconductor technology in a semiconductor body, so that the otherwise necessary external connection of a capacitor is eliminated.
  • the logic preferably consists of a NOR gate, at the first input of which the extended test pulse is applied as the positive pulse and at the second input of which the negative trigger pulses are present.
  • the length of the test pulse must be longer than the duration of the negative trigger pulse.
  • FIG. 1 shows the circuit for detecting misfires
  • FIGS. 2a to 2f show the mode of operation of the circuit.
  • NOR gate G 1 consists of an integrator stage 1 and a differentiation stage 2.
  • the output signals of both stages are given to an input of a NOR gate G 1 .
  • the output signal of the NOR gate controls a monostable multivibrator MF, via which the electronic control of the ignition system is switched off for a defined period of time when misfires occur.
  • the integrator stage 1 consists of a transistor T 4 at the base electrode of which the test signal U te is applied, which is obtained according to FIG. 2d from the residence time of the primary current in the ignition coil in the value I pr max required for the ignition.
  • the collector branch of the transistor T 4 contains the collector resistor R 5 , to which the series circuit comprising a capacitor C 2 and a diode D 2 is connected in parallel.
  • the base electrode of the output transistor T 5 is connected to the connection point between the capacitor C 2 and the diode D 2 , and the extended test pulse U INTEGR is applied to its collector resistor R 7 .
  • the emitter resistor R e of this output transistor T 5 is connected to the positive pole of the supply voltage source.
  • the output voltage U INTEGR of the integration stage 1 is given to the input E i of the NOR gate G I.
  • the differentiation stage 2 contains 3 transistor stages connected in series, with the transistors T 1 , T 2 and T 3 .
  • the control signal U IN which is tapped at the ignition pulse generator, is given to the base electrode of the input transistor T 1 .
  • the emitter collector path of this transistor T 1 is bridged with the differentiating element from the capacitor C 1 and the diode D 1 .
  • the transistor T 1 has an emitter resistor R 1 .
  • the base electrode of transistor T 2 whose emitter resistor R 2 is connected to the positive pole of the supply voltage, is connected to the connection point between differentiation capacitor C 1 and diode D 1 .
  • the input voltage for the transistor T 3 is tapped at the collector resistor R 3 , the negative trigger pulses U TRIGGER are tapped from the collector thereof and are fed to the input E 2 of the NOR gate G 1 .
  • the collector resistor R 4 of the output transistor T 3 of the differentiation stage 2 is in turn connected to the positive potential of the supply voltage source.
  • Fig. 1 can also be seen that the output terminal of the NOR gate G 1 is connected to the monostable multivibrator MF, at whose output the signal U ou t occurs, with which the electronic control of the ignition system is interrupted for a defined period of time.
  • FIG. 2a shows the control signal U IN which is applied to the control electrode of the transistor T 1 of the differentiating stage 2.
  • the periods P 1 and P 2 of the control signal are identical in the exemplary embodiment shown, while the period P 3 contains an error triggered, for example, by acceleration processes. In this period P 3 , the "low phase" of the control signal was extended at the expense of the "high phase". It is assumed that this error no longer occurs in the period P 4 .
  • 2b shows the trigger signal U TRIGGER , which occurs at output A of the differentiating stage and is applied to input E2 NOR gate G 1 . This trigger signal is obtained from the negative edge of the control signal when the control signal changes from the "high phase” to the "low phase”.
  • a pulse is obtained from each edge of the control signal U IN on the differentiator from the capacitor C 1 and the diode D 1 .
  • the trigger pulses originating from the positive edges of the control signal U IN are suppressed, so that only trigger signals from the negative edges are present at the collector resistor R 3 of the transistor T 2 of the control signal U IN .
  • These trigger pulses are inverted at transistor T 3 , so that trigger pulses according to FIG. 2b are present at output A of the transistor stage with transistor T 3 .
  • the trigger time during which the trigger signal U TRIGGER has its “low value” is designated t x according to FIG. 2b.
  • the course of the primary current in the ignition coil is shown in FIG. 2c.
  • the primary current can increase or have the value Ip r max required for the ignition.
  • the ignition coil is discharged at the time of ignition.
  • the primary current in normal operating mode and using the electronic control reaches its value I pr max required for the ignition by the time t e before the ignition point of the respective period. This value is also reached during the periods P 1 , P 2 and P 4 . 2c shows, however, that in the faulty period P 3 the primary current cannot reach its value I pr max required for the ignition, so that a misfire ZA occurs.
  • a test pulse U te is obtained from the time period in which the primary current remains at its maximum according to FIG. 2c, the pulse width of which is predetermined by the time t e according to FIG. 2d. Since the primary current in the ignition coil did not reach its value I pr max required for ignition in the third period, no test pulse U te occurs in this period either.
  • the test pulse U te is fed to an integrating amplifier or an integrator stage 1 according to FIG. 1, so that the test pulse is lengthened as shown in FIG. 2e with the aid of the capacitor C 2 .
  • the extension period is indicated by ty.
  • This signal U INTEGR is fed to the input E 1 of the NOR gate G 1 .
  • a "high level" only occurs at the output of NOR gate G 1 if both input levels at inputs E 1 and E2 are low. Since the trigger pulses according to FIG.
  • ty will be twice the size of t x .
  • the time of 20 ⁇ sec for t x and the time of 40 ⁇ sec for t y was set by appropriately dimensioning the capacitors C 1 and C 2 .
  • the capacitor C 1 had a value of approximately 30 pF and the capacitor C 2 a value of approximately 60 pF.
  • Capacitors of this size can very easily be integrated into integrated semiconductor circuits, so that no separate, externally connectable capacitors are required. The small values of the capacitances are also due in particular to the diodes D 1 and D 2 inserted into the circuit.
  • the capacitor C 2 is charged only via the base current of the transistor T 5 and not via the resistor R 5 of the parallel RC element, so that the capacitance C 2 can remain very small.
  • the present invention thus contains a significant improvement and simplification of the otherwise very advantageous electronically controlled ignition system according to the earlier German patent application P 3 111 856.9.

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)
EP82105517A 1981-07-10 1982-06-23 Elektronisch geregeltes Zündsystem Expired EP0069888B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3127230A DE3127230C2 (de) 1981-07-10 1981-07-10 Elektronisch geregeltes Zündsystem für Brennkraftmaschinen
DE3127230 1981-07-15

Publications (3)

Publication Number Publication Date
EP0069888A2 EP0069888A2 (de) 1983-01-19
EP0069888A3 EP0069888A3 (en) 1983-06-22
EP0069888B1 true EP0069888B1 (de) 1985-09-11

Family

ID=6136563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105517A Expired EP0069888B1 (de) 1981-07-10 1982-06-23 Elektronisch geregeltes Zündsystem

Country Status (4)

Country Link
US (1) US4452220A (ja)
EP (1) EP0069888B1 (ja)
JP (1) JPS5825571A (ja)
DE (1) DE3127230C2 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3868066D1 (de) * 1988-04-02 1992-03-05 Bosch Gmbh Robert Beobachtung der verbrennung in einer gezuendeten brennkraftmaschine.
DE4016307C2 (de) * 1990-05-21 2000-03-02 Bosch Gmbh Robert Zündkreisüberwachung an einer Brennkraftmaschine
US20090127342A1 (en) * 2007-11-20 2009-05-21 Symbol Technologies, Inc. Imaging Bar Code Reader with Illumination Control System

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1063257A (en) * 1964-12-02 1967-03-30 Lucas Industries Ltd Spark ignition systems
US3601103A (en) * 1969-10-13 1971-08-24 Ladell Ray Swiden Engine-condition-responsive cutoff apparatus
US3738340A (en) * 1972-01-10 1973-06-12 Ikon Eng Inc Internal combustion engine limiter
US3884203A (en) * 1973-04-23 1975-05-20 Arnie L Cliffgard Engine RPM control system
US3892219A (en) * 1973-09-27 1975-07-01 Gen Motors Corp Internal combustion engine ignition system
US3938490A (en) * 1974-07-15 1976-02-17 Fairchild Camera And Instrument Corporation Internal combustion engine ignition system for generating a constant ignition coil control signal
US4082075A (en) * 1976-02-27 1978-04-04 Motorola, Inc. Input quarter cycle timing circuit
DE2703431C2 (de) * 1977-01-28 1986-09-18 Robert Bosch Gmbh, 7000 Stuttgart Zündanlage für Brennkraftmaschinen
DE2821085A1 (de) * 1978-05-13 1979-11-15 Bosch Gmbh Robert Zuendanlage fuer eine brennkraftmaschine
JPS54158536A (en) * 1978-06-02 1979-12-14 Hitachi Ltd Current control circuit for ignition device
DE3027113C2 (de) * 1980-07-17 1984-05-17 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für Fernmeldevermittlungsanlagen, insbesondere Fernsprechvermittlungsanlagen mit vorübergehend nicht erreichbaren Teilnehmerstellen
DE3111856C2 (de) * 1981-03-26 1992-10-08 Telefunken electronic GmbH, 7100 Heilbronn Elektronisch geregeltes Zündsystem für eine Brennkraftmaschine

Also Published As

Publication number Publication date
JPH028146B2 (ja) 1990-02-22
DE3127230C2 (de) 1985-11-07
EP0069888A3 (en) 1983-06-22
EP0069888A2 (de) 1983-01-19
DE3127230A1 (de) 1983-01-27
JPS5825571A (ja) 1983-02-15
US4452220A (en) 1984-06-05

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