EP0422023B1 - Capacitive discharge ignition system for endothermic engines, preferably low-powered ones - Google Patents

Capacitive discharge ignition system for endothermic engines, preferably low-powered ones Download PDF

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Publication number
EP0422023B1
EP0422023B1 EP89906191A EP89906191A EP0422023B1 EP 0422023 B1 EP0422023 B1 EP 0422023B1 EP 89906191 A EP89906191 A EP 89906191A EP 89906191 A EP89906191 A EP 89906191A EP 0422023 B1 EP0422023 B1 EP 0422023B1
Authority
EP
European Patent Office
Prior art keywords
winding
recharging
capacitor
function
winding system
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
Application number
EP89906191A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0422023A1 (en
Inventor
Astorre Biondi
Gianni Regazzi
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.)
Ducati Energia SpA
Original Assignee
Ducati Energia SpA
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 Ducati Energia SpA filed Critical Ducati Energia SpA
Publication of EP0422023A1 publication Critical patent/EP0422023A1/en
Application granted granted Critical
Publication of EP0422023B1 publication Critical patent/EP0422023B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • 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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit

Definitions

  • the subject of the present invention is a capacitive discharge ignition device for endothermic engines, preferably low-powered ones according to the first part of claim 1.
  • Such a device is known form US-A- 3 545 420.
  • the invention has a particular although not exclusive application for motor saws, lawn mowers, and all those small engines, generally low powered, which have a particularly small ignition system. However, this does not exclude application in various sectors in the ambit of the above-mentioned title, and is therefore not limited to low powered engines as this sector is only the preferential one.
  • the object of the present invention is to eliminate one of said windings in order to further simplify the device and reduce the overall dimensions in particular.
  • US-A-3545420 discloses an ignition device, using a high-voltage generator device of the type having at least two inductive windings paired together which can be actuated by magnetic flow variation, of which at least one is a recharging winding system for capacitor means of the ignition system, and in which the charging voltage of said capacitor is induced by the flow variation provoked by the relative movement of magnetic means,
  • Another object of the invention is to improve the efficacy of the ignition system avoiding complexity.
  • the auxiliary circuitry to be connected with the diode which can also operate on high voltage, at the winding of said recharging coil which also has the function of secondary winding, will be such as to polarize said diode:
  • a possible diagram for said auxiliary circuitry may utilize a capacitor element wound with controlled impedance as described in the Italian patent applications (IT-83490A/87-IT-83491 A/87) in the name of DUCATI ENERGIA, corresponding to the application for international "PCT" patent (PCT/IT88/00039), which however does not prevent the use of traditional components in said circuiting, that is to say, the use of adequate separate inductance and capacitive elements.
  • Figure 1 gives a view of one circuit of the invention, using the device as in the above-mentioned "PCT/IT88/00039".
  • Figure 2 gives a view of an alternative less preferable circuit realized with separate, adequate elements of inductance and capacity used in the traditional techniques.
  • the spark plug's ignition system is marked with “C”
  • the twin-function, recharging induced winding is marked with “1”
  • the diode which is also able to operate on high voltage is marked with “2”
  • the respective circuitry which is able to carry out the inductance function is marked with “PV” and includes the primary winding marked with "3-4-5-6/6" and capacity "7".
  • the circuitry solution (PV) in Fig.2 is substantially similar to that in Fig. 1, but has a different design.
  • the recharging winding (1) shall be preferably coaxial to the primary one (3-4-5-6/6), thus forming a sole coil with several coaxial windings.

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)
  • Plasma Technology (AREA)
EP89906191A 1988-06-20 1989-05-23 Capacitive discharge ignition system for endothermic engines, preferably low-powered ones Expired - Lifetime EP0422023B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT83422/88A IT1220902B (it) 1988-06-20 1988-06-20 Sistema di accensione a scarica capacitiva per motori endotermici preferibilmente di piccola cilindrata
IT8342288 1988-06-20
PCT/IT1989/000039 WO1989012745A1 (en) 1988-06-20 1989-05-23 Capacitive discharge ignition system for endothermic engines, preferably low-powered ones

Publications (2)

Publication Number Publication Date
EP0422023A1 EP0422023A1 (en) 1991-04-17
EP0422023B1 true EP0422023B1 (en) 1994-08-31

Family

ID=11321663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89906191A Expired - Lifetime EP0422023B1 (en) 1988-06-20 1989-05-23 Capacitive discharge ignition system for endothermic engines, preferably low-powered ones

Country Status (7)

Country Link
EP (1) EP0422023B1 (it)
KR (1) KR900702226A (it)
AT (1) ATE110822T1 (it)
AU (1) AU3682189A (it)
DE (1) DE68917923T2 (it)
IT (1) IT1220902B (it)
WO (1) WO1989012745A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1234175B (it) * 1989-02-21 1992-05-05 Ducati Energia Spa Metodo e dispositivo survoltore.
IT1235390B (it) * 1989-06-01 1992-06-30 Ducati Energia Spa Sistema di accensione integrato per motori a combustione interna.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545420A (en) * 1968-11-27 1970-12-08 Motorola Inc Capacitor discharge ignition system
GB1397565A (en) * 1971-08-17 1975-06-11 Plessey Co Ltd Spark ignition systems
DE2263244A1 (de) * 1971-12-28 1973-07-12 Yamaha Motor Co Ltd Zuendanlage fuer brennkraftmaschinen
JPS611663U (ja) * 1984-06-11 1986-01-08 株式会社共立 点火装置

Also Published As

Publication number Publication date
EP0422023A1 (en) 1991-04-17
IT8883422A0 (it) 1988-06-20
DE68917923T2 (de) 1995-03-23
ATE110822T1 (de) 1994-09-15
KR900702226A (ko) 1990-12-06
DE68917923D1 (de) 1994-10-06
IT1220902B (it) 1990-06-21
AU3682189A (en) 1990-01-12
WO1989012745A1 (en) 1989-12-28

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