EP0069888A2 - Systèmes d'allumage à commande électronique - Google Patents

Systèmes d'allumage à commande électronique Download PDF

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Publication number
EP0069888A2
EP0069888A2 EP82105517A EP82105517A EP0069888A2 EP 0069888 A2 EP0069888 A2 EP 0069888A2 EP 82105517 A EP82105517 A EP 82105517A EP 82105517 A EP82105517 A EP 82105517A EP 0069888 A2 EP0069888 A2 EP 0069888A2
Authority
EP
European Patent Office
Prior art keywords
pulse
ignition
trigger
electronically controlled
primary current
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
EP82105517A
Other languages
German (de)
English (en)
Other versions
EP0069888A3 (en
EP0069888B1 (fr
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
Licentia Patent Verwaltungs 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 Telefunken Electronic GmbH, Licentia Patent Verwaltungs GmbH filed Critical Telefunken Electronic GmbH
Publication of EP0069888A2 publication Critical patent/EP0069888A2/fr
Publication of EP0069888A3 publication Critical patent/EP0069888A3/de
Application granted granted Critical
Publication of EP0069888B1 publication Critical patent/EP0069888B1/fr
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 (I pr ) flowing through the primary winding of the ignition coil is regulated in a speed-dependent manner such that this current only reaches the value (I max ) required for the ignition shortly before the time of ignition and at which immediately before the ignition point it is determined whether the primary current has reached the value required for the ignition by deriving a test pulse (U te ) from the dwell time (t e ) of the primary current in the value required for the ignition (I pr max), with which Help if the primary current does not exist 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 sender and after the end of the switch-off period the electronically controlled control state is continuous and automatically again is brought about.
  • a test pulse of the time 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. From that it follows that the voltage across the capacitor falls below the value of a comparison voltage when test pulses occur, which is fixed and is, for example, half as large as the maximum possible voltage across the capacitor during the following test pulse.
  • 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 directly from Control signal of the ignition pulse generator is derived.
  • 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 and integration-capable capacitors.
  • This object is achieved according to the invention in an electronically controlled ignition system of the type Ar described in the introduction in that the test pump pulse (U te ) with an integration stage (1) by a time interval (t y ) extended and the extended pulse (U INTEGR )) is fed to a first input (E 1 ) of a logic circuit (G 1 ) that a second input (E2) of the logic circuit (G 1 ) a derived from the switching edge of the control signal (U IN ) Triggerim p uls (U TRIGGER ) is supplied, and that the logic (G l ) is selected so that an output pulse (U MF ) which triggers the switch-off of the electronic control only occurs when none of the integration stage supplied during the trigger pulse Pulse is present.
  • 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 a positive pulse and at the second input of which the negative trigger pulses are applied.
  • the extension - duration of the test pulse must be greater than the duration of the negative trigger pulse.
  • FIG. 1 shows the circuit for the detection of ignition set, while the operation of the circuit results from the diagrams of Figures 2a to 2f.
  • the circuit according to FIG. 1 consists of an integrator stage 1 and a differentiating stage 2.
  • the output signals of both stages are given to one input of an N OR 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 Ausganastransistors T 5 is connected, the extended P Rue F U INTEGR pulse applied to its collector resistor R. 7
  • the emitter resistor R 6 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 1 of the NOR gate G 1 .
  • 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 an emitter resistor R 1 .
  • the Base electrode of transistor T 2 is connected, the emitter resistor R 2 of which is connected to the positive pole of the supply voltage.
  • the input voltage for the transistor T 3 is tapped, from whose collector the negative trigger pulses U TRIGGER are tapped and 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. It can also be seen from FIG. 1 that the output connection of the! NOR gate G 1 is connected to the monostable multivibrator MF, at whose output the signal U out 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 P1 and P 2 of the control signal are, for example, identical in the 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 .
  • the trigger signal U TRIGGER DAR is set, the dividing stage appears at the output A, and is applied to the 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 are present at the collector resistor R 3 of the transistor T 2 , which are from the negative edges of the control signals U IN originate.
  • 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 denoted by t in accordance with 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 I pr max required for the ignition.
  • the ignition coil is discharged at the time of ignition.
  • the P_imärstrom reaches in normal operation and using the electronic control its value I p r 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 . From FIG. 2c, however, it can be seen that, in the faulty period P 3, the primary current cannot reach its value I p r max required for the ignition, so that a misfire ZA occurs.
  • a test pulse U te is obtained from the time span 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 prime current in the ignition coil did not reach its value I p r max required for ignition in the third period, no test pulse U te occurs in this period either.
  • the test pulse C 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 designated t y .
  • a voltage according to FIG. 2e is thus present at the output of the integrator stage 1, the pulses of which have the pulse width t e + t y .
  • This signal U INNTEGR is the input E 1 of the NOR Gate G 1 supplied. By definition, a "high level" only occurs at the output of NOR gate G 1 if both input levels at inputs E 1 and E 2 are low.
  • t y will be twice the size of t.
  • the time was for t x 20 usec and t y is the time of 40 usec nierun by appropriate dimensioning g of the capacitors C l and C 2 is set.
  • 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 easily be integrated into integrated semiconductor circuits. are, 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 31 11 856.9.

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  • 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 Systèmes d'allumage à commande électronique Expired EP0069888B1 (fr)

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 true EP0069888A2 (fr) 1983-01-19
EP0069888A3 EP0069888A3 (en) 1983-06-22
EP0069888B1 EP0069888B1 (fr) 1985-09-11

Family

ID=6136563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105517A Expired EP0069888B1 (fr) 1981-07-10 1982-06-23 Systèmes d'allumage à commande électronique

Country Status (4)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960012145B1 (ko) * 1988-04-02 1996-09-16 로베르트 보쉬 게엠베하 스파크 점화 내연 기관의 연소를 모니터하는 방법 및 그 장치
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
EP0069888A3 (en) 1983-06-22
EP0069888B1 (fr) 1985-09-11
DE3127230A1 (de) 1983-01-27
JPH028146B2 (fr) 1990-02-22
DE3127230C2 (de) 1985-11-07
JPS5825571A (ja) 1983-02-15
US4452220A (en) 1984-06-05

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