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EP0378714A1 - Circuit d'allumage pour moteur à combustion interne - Google Patents

Circuit d'allumage pour moteur à combustion interne Download PDF

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Publication number
EP0378714A1
EP0378714A1 EP19890100639 EP89100639A EP0378714A1 EP 0378714 A1 EP0378714 A1 EP 0378714A1 EP 19890100639 EP19890100639 EP 19890100639 EP 89100639 A EP89100639 A EP 89100639A EP 0378714 A1 EP0378714 A1 EP 0378714A1
Authority
EP
European Patent Office
Prior art keywords
capacitor
ignition
switching device
circuit
controlled switching
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.)
Ceased
Application number
EP19890100639
Other languages
German (de)
English (en)
Inventor
Georg Haubner
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
Priority to EP19890100639 priority Critical patent/EP0378714A1/fr
Publication of EP0378714A1 publication Critical patent/EP0378714A1/fr
Ceased 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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/03—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means
    • 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
    • F02P3/06—Other installations having capacitive energy storage
    • F02P3/08—Layout of circuits
    • F02P3/0807—Closing the discharge circuit of the storage capacitor with electronic switching means
    • F02P3/0838—Closing the discharge circuit of the storage capacitor with electronic switching means with semiconductor devices

Definitions

  • the present invention relates to an ignition system and particularly a so-called distributorless ignition system for an internal combustion engine where the conventional rotating contact arrangement is re­placed by electronic circuitry.
  • Capacitor/discharge ignition is well known for conventional ignition circuits utilizing a conventional distributor.
  • the ignition energy is stored in the electric field of a capacitor.
  • the capacitance and charging voltage of the capacitor determine the quantity of stored energy.
  • the capacitor together with the charging device for the capacitor and the triggering varistor are all customarily located in the primary circuit of the ignition coil and triggering can be achieved either by using breaker-triggered or breakerless devices. It has also been previously been proposed to utilize an inverter to provide high voltage pulses as charging pulses for the capacitor.
  • the present invention provides an ignition circuit for an internal combustion engine comprising a coil having primary and secondary windings, an inverter for providing voltage pulses, a capacitor for storing voltage pulses and a controlled switching device for discharging the capacitor at a time determined by a timing device, characterized in that the inverter is arranged in the primary circuit of the transformer and in that the capacitor an controlled switching device are connected in the is secondary circuit of the transformer.
  • the capacitor is charged from the secondary winding of the ignition transformer via one or more rectifier devices which may be diodes or controlled rectifier devices.
  • Fig. 1 shows an ignition circuit comprising an ignition transformer 10 having a primary winding 11 and a secondary winding 12.
  • a battery powered inverter 14 supplies voltage pulses to the primary winding of the ignition transformer 10 and high voltage pulses are derived from the secondary winding 12 which are fed via rectifying devices in the form of diodes D1, D2, D3 to a capacitor 15.
  • the capacitor is a 100 mF 20 kV capacitor which means that the diodes D1, D2, D3 must be high voltage devices and they are preferably provided with shunt capacitors C1, C2, C3 respectively to provide breakdown protection.
  • the charge on the capacitor 15 is discharged when it is required to generate an ignition spark.
  • discharge of the capacitor is triggered via a controlled switching device 16 connected in series with the spark plug 17.
  • the controlled switching device is operated from a timing unit 18 which receives ignition position signals from any suitable sensor.
  • the secondary winding 12 may be formed by discrete coils located between the diodes D1, D2 and D3.
  • the controlled switching device 16 may be located in a spark plug connector physically attached to the top of the spark plug itself. Also, in view of the fact that the switching device 16 has to be rated at a very high voltage, it may be preferable to utilize a number of series connected switching devices which are triggered simultaneously.
  • Fig. 3 shows an arrangement which utilizes a single primary winding and battery powered inverter arranged to supply voltage pulses to a plurality of compartmented secondary windings, in this case three secondary windings so as to supply charging voltage pulses to three separate capacitors.
  • Each of the secondary circuits may be as described in relation to Fig. 1.
  • Fig. 4 a slightly different arrangement is shown to that described in relation to Fig. 1 but in Fig. 4 the same reference numerals are used to represent the same parts as are used in Fig. 1.
  • the controlled switching device 16 is located adjacent the ignition transformer 10 and the capacitor 15 and is connected between one plate of the capacitor 15 and earth whereas the other plate of the capacitor 15 is directly connected to the central electrode of the spark plug 17.
  • a positive earth system it will be appreciated that by reversing the plurality of the diodes and the plurality of the controlled switching device a negative earth system could also be achieved.
  • the controlled switching device is on the earth side of the capacitor 15, more than one ignition pulse can be generated simultaneously simply by connecting a plurality of spark plugs in parallel to the other side of the capacitor 15.
  • compartmented coil arrangement of Fig. 3 could also be adapted to take the secondary circuit arrangement described in relation to Fig. 4.

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)
EP19890100639 1989-01-14 1989-01-14 Circuit d'allumage pour moteur à combustion interne Ceased EP0378714A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19890100639 EP0378714A1 (fr) 1989-01-14 1989-01-14 Circuit d'allumage pour moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890100639 EP0378714A1 (fr) 1989-01-14 1989-01-14 Circuit d'allumage pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP0378714A1 true EP0378714A1 (fr) 1990-07-25

Family

ID=8200864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890100639 Ceased EP0378714A1 (fr) 1989-01-14 1989-01-14 Circuit d'allumage pour moteur à combustion interne

Country Status (1)

Country Link
EP (1) EP0378714A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU656335B2 (en) * 1990-11-03 1995-02-02 Dawson Royalties Limited Electrical circuit
WO2016153373A1 (fr) * 2015-03-23 2016-09-29 Kolanowski Marek Dispositif d'allumage à haute énergie pour le gaz et le pétrole

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE406990A (fr) *
NL69862C (fr) * 1948-08-02 1952-04-15
GB725619A (en) * 1952-06-10 1955-03-09 Smitsvonk Nv Improvements in or relating to low voltage ignition systems
FR1247459A (fr) * 1959-10-22 1960-12-02 Renault Perfectionnements aux générateurs d'étincelles
FR2378386A1 (fr) * 1977-01-19 1978-08-18 Bosch Gmbh Robert Installation d'allumage pour moteurs a combustion interne
US4223656A (en) * 1978-10-27 1980-09-23 Motorola, Inc. High energy spark ignition system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE406990A (fr) *
NL69862C (fr) * 1948-08-02 1952-04-15
GB725619A (en) * 1952-06-10 1955-03-09 Smitsvonk Nv Improvements in or relating to low voltage ignition systems
FR1247459A (fr) * 1959-10-22 1960-12-02 Renault Perfectionnements aux générateurs d'étincelles
FR2378386A1 (fr) * 1977-01-19 1978-08-18 Bosch Gmbh Robert Installation d'allumage pour moteurs a combustion interne
US4223656A (en) * 1978-10-27 1980-09-23 Motorola, Inc. High energy spark ignition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU656335B2 (en) * 1990-11-03 1995-02-02 Dawson Royalties Limited Electrical circuit
WO2016153373A1 (fr) * 2015-03-23 2016-09-29 Kolanowski Marek Dispositif d'allumage à haute énergie pour le gaz et le pétrole

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): DE SE

17P Request for examination filed

Effective date: 19901219

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

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Effective date: 19930416

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Effective date: 19940107