JPS5581264A - Fail safe circuit - Google Patents

Fail safe circuit

Info

Publication number
JPS5581264A
JPS5581264A JP15408278A JP15408278A JPS5581264A JP S5581264 A JPS5581264 A JP S5581264A JP 15408278 A JP15408278 A JP 15408278A JP 15408278 A JP15408278 A JP 15408278A JP S5581264 A JPS5581264 A JP S5581264A
Authority
JP
Japan
Prior art keywords
scr
turn
inverter
thyristor
potential
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.)
Pending
Application number
JP15408278A
Other languages
Japanese (ja)
Inventor
Kinya Fujimoto
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP15408278A priority Critical patent/JPS5581264A/en
Publication of JPS5581264A publication Critical patent/JPS5581264A/en
Pending legal-status Critical Current

Links

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
    • F02P11/00—Safety means for electric spark ignition, not otherwise provided for
    • F02P11/06—Indicating unsafe conditions

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)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

PURPOSE:To detect thyristor's turn off failure, turn off the thyristor and then enable it to resume proper operation, by operating a switch circuit by means of two resistors which divide anode voltage of the thyristor. CONSTITUTION:In a condition in which the potential, which is obtained by a division of an SCR's anode voltage by resistors R9 and R8, keeps a transistor Tr3 ON, Tr2 is ON and Tr1 is OFF, and potential of an inverter control output is equal to that of V<+>, and inverter 1 is in oscillation. When the SCR became ON, Tr3 becomes OFF, and therefore, base potential of Tr2 is raised to the level of V<+> and becomes OFF to stop the inverter. Now, when ignition time completed and the SCR is turned OFF, Tr3 is turned ON by residual charge and the inverter resumes oscillation. By using this mechanism, it becomes possible to detect occurrence of SCR TURN-OFF failure, turn the SCR properly, and therefore, it is possible to ensure a smooth operation of an engine.
JP15408278A 1978-12-15 1978-12-15 Fail safe circuit Pending JPS5581264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15408278A JPS5581264A (en) 1978-12-15 1978-12-15 Fail safe circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15408278A JPS5581264A (en) 1978-12-15 1978-12-15 Fail safe circuit

Publications (1)

Publication Number Publication Date
JPS5581264A true JPS5581264A (en) 1980-06-19

Family

ID=15576488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15408278A Pending JPS5581264A (en) 1978-12-15 1978-12-15 Fail safe circuit

Country Status (1)

Country Link
JP (1) JPS5581264A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0748972A (en) * 1994-07-11 1995-02-21 Ykk Kk Sash for use in modification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0748972A (en) * 1994-07-11 1995-02-21 Ykk Kk Sash for use in modification

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