US3903862A - Capacitor discharge type contactless ignition system for internal combustion engines - Google Patents

Capacitor discharge type contactless ignition system for internal combustion engines Download PDF

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Publication number
US3903862A
US3903862A US374097A US37409773A US3903862A US 3903862 A US3903862 A US 3903862A US 374097 A US374097 A US 374097A US 37409773 A US37409773 A US 37409773A US 3903862 A US3903862 A US 3903862A
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United States
Prior art keywords
capacitor
ignition
charging
coil
primary winding
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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
US374097A
Inventor
Masao Nagasawa
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.)
Denso Corp
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NipponDenso Co Ltd
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
Priority claimed from JP6567472A external-priority patent/JPS5417898B2/ja
Priority claimed from JP1972090650U external-priority patent/JPS5430505Y2/ja
Priority claimed from JP2550873U external-priority patent/JPS49126104U/ja
Priority claimed from JP3138173U external-priority patent/JPS49130233U/ja
Priority claimed from JP1973031852U external-priority patent/JPS5322651Y2/ja
Priority claimed from JP3428573U external-priority patent/JPS49132330U/ja
Priority claimed from JP3739073U external-priority patent/JPS5343939Y2/ja
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Application granted granted Critical
Publication of US3903862A publication Critical patent/US3903862A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • 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
    • F02P7/035—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means without mechanical switching means

Definitions

  • FIG. 1 A first figure.

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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)

Abstract

A capacitor discharge type contactless ignition system for an internal combustion engine is provided in which the stored charge on a capacitor adapted to charge and discharge in one direction only, is discharged through the primary winding of an ignition coil, thus inducing a high voltage in the secondary winding of the ignition coil and providing an ignition spark to a spark plug connected to the secondary winding. The ignition system is so designed that any undesired storage action of the capacitors can be prevented to thereby ensure an excellent ignition advance characteristic and at the same time the developed voltage on the capacitors can be easily made uniform to thereby prevent any misoperation of the engine and ensure a reliable operation thereof.

Description

United States Patent Nagasawa Sept. 9, 1975 [54] CAPACITOR DISCHARGE TYPE 3,598,098 8/1971 Sohneret a1. 123/148 MC CONTACT-LESS IGNITION SYSTEM FOR 3,648,675 3/1972 Gemander t 123/]49 R 3,722 488 3/1973 Swift v l23/149R INTERNAL COMBUSTION ENGINES 3.739.759 6/1973 Sleder 123/148 MC [75] Inventor: Masao Nagasawa, Kariya, Japan 3,791,363 2/l974 Schmaldienst 123/148 E N td., K [73] Asslgnee gs Co L anya Primary ExamznerManuel A. Antonakas p Assistant Examiner-Joseph Cangelosi [22] Filed: June 27, 1973 Attorney. Agent, or Firm-Cushman, Darby & 21 Appl. N0.: 374,097 Cushma [57] ABSTRACT [30] Forelgn Appllcatlon Prlorlty Data A t d h t u capacl or 15C arge ype contac ess ignition system June 29. 1972 Japan 4165674 for an internal Combustion engine is provided in which July 31, 1972 Japan... 47-90650 the stored charge on a capacitor adapted to charge Feb. 27 1973 Japan... 48-25508 and discharge in one direction only, lS discharged Mar. 13. 1973 Japan... 48-31381 through the primary winding of an lgmtlon 0011, thus Mar. 15, 1973 Japan 48-31852 mducmg a high voltage in the secondary winding of Mar. 20 1973 Japan 4834285 h d k Mar 27 1973 Japan 4847390 t e lgnltion col an provl mg an IgnlKlOfl spar to a spark plug connected to the secondary winding. The Us. Cl- I u 1 V I v I I 7 123/148 315/209 ignl ton syster? IShSO designed that anly undeslred stor 1 Int Cl p 00 age action 0 t e capacitors can e prevented to 58} i E 149 thereby ensure an excellent ignition advance charac o are teristic and at the same time the developed voltage on References Cited the capacitors can be easily made uniform to thereby prevent any mrsoperatlon of the engine and ensure a UNITED STATES PATENTS reliable operation thereof. 3,495,579 2/1970 Davalillo 123/149 R 3,554,179 6/1969 Burson I23/l49 A 20 Clams 60 Drawmg F'gures PATENTEDSEP 9M5 3,903,862
SHEET 2 FIG. 2
PATENTED 91975 3. 903 8B2 SHEET FIG. 3
PAIENTED 94975 SHEET FIG. 7
PATENTED 1 5 SHEET FIG. 8
PATENTEB SEP 9 1975 SHEEI FIG. 9
FIG.
PATENTED 35? 91975 SHEET FIG.
I I -480 U PATENTED 35F 9 SHEET FIG. l3
PATENTEU 3E? 75 swan 13 F I ONE REVOLUTION v PERI I) 1 V T A [A A i 1 A A O V V V v V v a v I I --1 (C2) 0 V" i l/ v (d') O A r V V \1 (d2) J 0 \j (e A A PATENTEU SEP 9 975 SHEET FIG.
PATENTED 91975 3,903,862
' sum 17 FIG. l8
FIG. 2|
(NE REVOLUTION IOD

Claims (20)

1. In a capacitor discharge type contactless ignition system for an internal combustion engine, used with a magneto generator, comprising: charging circuit means including capacitor charging coil means coupled to a magneto generator for generating an alternating current signal during rotation of said magneto generator, rectifying means for rectifying said alternating current signal of said capacitor charging coil means to produce halfwaves and a capacitor, said coil means rectifying means and capacitor being connected in series to permit current flow from said capacitor charging coil means through said rectifying means and said capacitor, discharging circuit means connected to said capacitor including semiconductor switching means having a control electrode and a primary winding of an ignition coil having said primary winding and a secondary winding, said capacitor switching means and primary winding being connected in series to cause the stored charge on said capacitor to discharge through said primary winding upon conduction of said switching means; a spark plug connected to said secondary winding; and ignition control means connected to said control electrode of said semiconductor switching means for sequentially generating ignition timing signals in synchronism with the rotation of an engine, the time between adjacent timing signals defining a cycle and including a plurality of half-waves, the improvement comprising; bypassing conduction means connected to said charging circuit means for preventing charging of said capacitor; and bypassing controlling means for causing said alternating current to by-pass said capacitor through said bypassing conduction means, when said engine is rotating in a normal direction, for all but a selected number less than all of half-waves of said alternating current signal, which will otherwise charge said capacitor, and which are produced by said capacitor charging coil means after said ignition timing signal during each cycle, said cycle having a duration from a certain ignition timing signal to the next ignition timing signal and starting from the point where said capacitor begins charging.
2. An ignition system as set forth in claim 1, wherein said ignition control means is a transformer connected to said capacitor charging coil means.
3. An ignition system as set forth in claim 1 wherein said ignition control means includes a timing signal generator having signal coil means coupled to said magneto generator for producing a sequence of ignition signals during rotation of said magneto generator; and inductor means, mounted in said magneto generator for inducing said ignition timing signal in said signal coil means.
4. An ignition system as set forth in claim 3, wherein said bypasss controlling means includes second inductor means mounted in said magneto generator for inducing in said signal coil means a control signal.
5. An ignition system as set forth in claim 1 wherein said bypassing conduction means includes means for connecting said semiconductor switching means to said bypass controlling means so that for each cycle all but one of said half-waves are passed through said switching means.
6. An ignition system as set forth in claim 5, wherein said switching means is connected across both terminals of said capacitor charging coil means.
7. An ignition system as set forth in claim 1 wherein said bypassing conduction means is connected in parallel with said capacitor.
8. An ignition system as set forth in claim 1 wherein said capacitor charging coil means comprises two coils wound on different cores mounted in said magneto generator.
9. An ignition system as set forth in claim 1, wherein said capacitor charging coil means generates at least three cycles of said alternating current for each revolution of said magneto generator, and said capacitor is charged with more than two half-waves of said alternating current.
10. An ignition system as set forth in claim 1 wherein said capacitor charging coil means comprises two coils connected in parallel and out of phase by less than 180 degrees with each other.
11. An ignition system as set forth in claim 1, further comprising: a second charging circuit means including a second capacitor charging coil means for generating alternating current; a second rectifying means for rectifying said alternating current of said second capacitor charging coil means and second capacitor, said second coil means, second rectifying means and second capacitor being connected in series to permit current flow from said capacitor charging coil means through said second rectifying means and said second capacitor; a second discharging circuit means connected to said second capacitor, including second semiconductor switching means having a control electrode and a primary winding of a second ignition coil having said primary winding and a secondary winding said second switching means second primary winding and second capacitor being connected in series to cause the stored charge on said second capacitor to discharge through said second primary winding upon conduction of said second switching means; a second spark plug connected to said secondary winding; a second ignition control means connected to said control electrode of said second semiconductor switching means of said second discharging circuit means for generating ignition timing signals in synchronism with the rotation of said engine, the time between adjacent signals defining a cycle and including a plurality of halfwaves; a second bypassing conduction means connected to said second charging circuit means for preventing charging of said second capacitor; and a second bypass controlling means for causing said alternating current of said second charging circuit means to bypass said second capacitor when said engine is rotating in a proper direction for all but one of said half-waves of said alternating current signal which will otherwise charge said second capacitor, and which are produced by said second capacitor charging coil means of said second charging circuit after said ignition timing during each cycle, said one cycle having a duration from a certain ignition timing signal to next ignition timing signal and starting from the point where said second capacitor begins charging.
12. An ignition system as set forth in claim 11 wherein said second ignition control means is a transformer whose primary winding is connected in parallel with said second capacitor charging coil means and whose secondary winding is connected to said control electrode of said second semiconductor switching means.
13. An ignition system as set forth in claim 11, wherein said second ignition control means includes a timing signal generator having signal coil means coupled to said magneto generator for producing a sequence of ignition signals during rotation of said magneto generator; and inductor means, mounted in said magneto generator for inducing said ignition timing signal in said second signal coil means.
14. An ignition system as set forth in claim 13, wherein said second bypass controlling means includes second inductor means mounted in said magneto generator for inducing in said second signal coil means a control signal.
15. An ignition system as set forth in claim 11, wherein said second bypass controlling means is said capacitor charging coil means.
16. An ignition system as set forth in claim 11 wherein said second capacitor charging coil means comprises two coils wound on different cores mounted in said magneto generator.
17. An ignition system as set forth in claim 11 wherein said bypass controlling means comprises; signal generating means mounted in said magneto generator; and a transformer connected in said second charging circuit means, and said second bypass controlling means comprises; further signal generating means mounted in said magneto generator; and a transformer connected in said second charging circuit means.
18. An ignition system as set forth in claim 1 further comprising: second charging circuit means including a second capacitor charging coil means coupled to said magneto generator for generating an alternating current signal during rotation of said magneto generator, a second rectifying means for rectifying said alternating current signal of said second capacitor charging coil means to produce half-waves and a second capacitor said second coil means, second rectifying means and second capacitor being connected in series to permit current flow from said second capacitor charging coil means through said second capacitor; a second discharging circuit means connected said second capacitor to said semiconductor switching means having said control electrode and a primary winding of a second ignition coil having said primary winding and a secondary winding, said second capacitor, switching means and second primary winding being connected in series to cause the stored charge on said second capacitor to discharge through said primary winding of said second ignition coil upon conduction of said switching means; a second spark plug connected to said secondary winding; second bypassing conduction means connected to said second charging circuit means for preventing charging of said second capacitor; and a second bypass controlling means for causing said alternating current signal of said second capacitor charging coil means to bypass said second capacitor through said second bypassing conduction means both when said engine is rotating in a proper direction for all but one of said half-waves of said alternating current signal, which will otherwise charge said second capacitor, and which are produced by said second capacitor charging coil means after said ignition timing signal during each cycle, said cycle having a duration from a certain ignition timing, to next ignition timing signal and starting from the point where said second capacitor begins charging.
19. An ignition system as set forth in claim 1, further comprising; a second charging circuit means including means connecting a second capacitor to said capacitor charging coil'' means, a second rectifying means for rectifying said alternating current signal and said second capacitor, said charging coil means, second rectifyIng means, and second capacitor being connected in series to permit current flow from said capacitor charging coil means through said second capacitor; a second discharging circuit means connected to said second capacitor, including a second semiconductor switching means having a control electrode and a primary winding of a second ignition coil having said primary winding and a secondary winding, said second capacitor, second switching means and second primary winding being connected in series to cause the stored charge on said second capacitor to discharge through said primary winding of said second ignition coil upon conduction of said second switching means; second spark plug connected to said secondary winding; second bypassing conduction means connected to said second charging circuit means for preventing charging of said second capacitor; and second bypass controlling means for causing said alternating current of said capacitor charging coil means to bypass said second capacitor through said second bypassing conduction means when said engine is rotating in a proper direction for all but one of said half-waves of said alternating current signal, which will otherwise charge said second capacitor, produced at said capacitor charging coil means after said ignition timing signal during each cycle, said cycle having a duration from a certain ignition timing signal to next ignition timing signal and starting from the point where said second capacitor begins charging.
20. An ignition system as set forth in claim 1, further comprising; a second discharging circuit means connected to said capacitor including a second semiconductor switching means having a control electrode and a primary winding of second ignition coil having said primary winding and a secondary winding, said capacitor, second switching means and second primary winding being connected in series to cause the stored charge on said capacitor to discharge through said primary winding of said second ignition coil upon conduction of said second semiconductor switching means; a second spark plug connected to said secondary winding of said second ignition coil; a second bypassing conduction means connected to said second charging circuit means for preventing charging of said capacitor; and, a second bypass controlling means for causing said alternating current signal of said capacitor charging coil means to bypass said capacitor through said second bypassing conduction means when said engine is rotating in a proper direction for all but a selected number less than all of said half-waves of said alternating current signal, which will otherwise charge said capacitor, and which are produced by said second capacitor charging coil means after said ignition timing signal during each cycle, said cycle having a duration from a certain ignition timing signal to next ignition timing and starting from the point where said capacitor begins charging.
US374097A 1972-06-29 1973-06-27 Capacitor discharge type contactless ignition system for internal combustion engines Expired - Lifetime US3903862A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP6567472A JPS5417898B2 (en) 1972-06-29 1972-06-29
JP1972090650U JPS5430505Y2 (en) 1972-07-31 1972-07-31
JP2550873U JPS49126104U (en) 1973-02-27 1973-02-27
JP3138173U JPS49130233U (en) 1973-03-13 1973-03-13
JP1973031852U JPS5322651Y2 (en) 1973-03-15 1973-03-15
JP3428573U JPS49132330U (en) 1973-03-20 1973-03-20
JP3739073U JPS5343939Y2 (en) 1973-03-27 1973-03-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061938A (en) * 1975-06-20 1977-12-06 Matsushita Electric Industrial Co., Ltd. Device for generating electrical pulses in response to shaft rotation
US4116188A (en) * 1973-10-17 1978-09-26 Nippondenso Co., Ltd. Capacitor discharge type contactless ignition system for internal combustion engines
US4244337A (en) * 1978-05-30 1981-01-13 Nippondenso Co., Ltd. Ignition system for internal combustion engines
FR2523778A1 (en) * 1982-03-18 1983-09-23 Bosch Gmbh Robert IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES
US4441478A (en) * 1980-02-08 1984-04-10 Mitsubishi Denki Kabushiki Kaisha Contactless magneto ignition system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495579A (en) * 1967-06-12 1970-02-17 Espanola Magnetos Fab Electronic ignition system with lighting
US3554179A (en) * 1969-06-19 1971-01-12 Phelon Co Inc Antireverse trigger for an ignition system
US3598098A (en) * 1968-05-02 1971-08-10 Bosch Gmbh Robert Ignition arrangment for internal combustion engines
US3648675A (en) * 1969-07-16 1972-03-14 Bosch Gmbh Robert Ignition arrangements for internal combustion engines
US3722488A (en) * 1971-03-22 1973-03-27 T Swift Capacitor discharge system
US3739759A (en) * 1972-02-04 1973-06-19 Brunswick Corp Rotation sensing pulse control generator for triggered ignition systems and the like
US3791363A (en) * 1972-02-08 1974-02-12 Rosch R Gmbh Electronically controlled reversal-proof magneto ignition system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495579A (en) * 1967-06-12 1970-02-17 Espanola Magnetos Fab Electronic ignition system with lighting
US3598098A (en) * 1968-05-02 1971-08-10 Bosch Gmbh Robert Ignition arrangment for internal combustion engines
US3554179A (en) * 1969-06-19 1971-01-12 Phelon Co Inc Antireverse trigger for an ignition system
US3648675A (en) * 1969-07-16 1972-03-14 Bosch Gmbh Robert Ignition arrangements for internal combustion engines
US3722488A (en) * 1971-03-22 1973-03-27 T Swift Capacitor discharge system
US3739759A (en) * 1972-02-04 1973-06-19 Brunswick Corp Rotation sensing pulse control generator for triggered ignition systems and the like
US3791363A (en) * 1972-02-08 1974-02-12 Rosch R Gmbh Electronically controlled reversal-proof magneto ignition system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116188A (en) * 1973-10-17 1978-09-26 Nippondenso Co., Ltd. Capacitor discharge type contactless ignition system for internal combustion engines
US4061938A (en) * 1975-06-20 1977-12-06 Matsushita Electric Industrial Co., Ltd. Device for generating electrical pulses in response to shaft rotation
US4244337A (en) * 1978-05-30 1981-01-13 Nippondenso Co., Ltd. Ignition system for internal combustion engines
US4441478A (en) * 1980-02-08 1984-04-10 Mitsubishi Denki Kabushiki Kaisha Contactless magneto ignition system
FR2523778A1 (en) * 1982-03-18 1983-09-23 Bosch Gmbh Robert IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

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DE2333010B2 (en) 1977-01-13
DE2333010A1 (en) 1974-02-21

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