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JPS5762965A - Method of and apparatus for detecting resistance of high-tension cord in ignition circuit - Google Patents

Method of and apparatus for detecting resistance of high-tension cord in ignition circuit

Info

Publication number
JPS5762965A
JPS5762965A JP55136889A JP13688980A JPS5762965A JP S5762965 A JPS5762965 A JP S5762965A JP 55136889 A JP55136889 A JP 55136889A JP 13688980 A JP13688980 A JP 13688980A JP S5762965 A JPS5762965 A JP S5762965A
Authority
JP
Japan
Prior art keywords
circuit
output
discharge
tension cord
time constant
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
JP55136889A
Other languages
Japanese (ja)
Other versions
JPS6056273B2 (en
Inventor
Takayuki Kato
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.)
Toyota Motor Corp
Toyota Motor Sales Co Ltd
Toyota Central R&D Labs Inc
Original Assignee
Toyota Motor Corp
Toyota Motor Sales Co Ltd
Toyota Central R&D Labs Inc
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 Toyota Motor Corp, Toyota Motor Sales Co Ltd, Toyota Central R&D Labs Inc filed Critical Toyota Motor Corp
Priority to JP55136889A priority Critical patent/JPS6056273B2/en
Publication of JPS5762965A publication Critical patent/JPS5762965A/en
Publication of JPS6056273B2 publication Critical patent/JPS6056273B2/en
Expired 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

PURPOSE:To detect the resistance of a high-tension cord without detaching the cord from a high-tension circuit, by extracting the time constant of discharge in an induction discharge region of a secondary voltage signal detected from an ignition circuit, and detecting the resistance of the high-tension cord from the time constant of discharge. CONSTITUTION:A detecting citucit 1 detects a high, secondary voltage V2 from an engine igniting circuit of an automobile or the like, and the output of the circuit 1 is applied to a differentiation circuit 2, where the time constant tau of discharge in the secondary voltage V2is extracted. The differential output of the circuit 2 is converted into a pluse signal c proportional to the duration of the differential output in a waveform shaping circuit 3 and then applied to an integration circuit 4. The circuit 4 converts the output c of the circuit 3 into a voltage signal d proportional to the width of the pulse signal c, and the output of the circuit 4 is in turn applied to a peak holding circuit 5 for hilding the peak value for a certain time period. This periopd is determined by the output of a reset-signal generating circuit 6, and the output of the circuit 5 is shown by an indicating circuit 7 as the resistance value of the high-tension cord.
JP55136889A 1980-09-30 1980-09-30 Method and device for detecting resistance of high voltage cord in ignition circuit Expired JPS6056273B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55136889A JPS6056273B2 (en) 1980-09-30 1980-09-30 Method and device for detecting resistance of high voltage cord in ignition circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55136889A JPS6056273B2 (en) 1980-09-30 1980-09-30 Method and device for detecting resistance of high voltage cord in ignition circuit

Publications (2)

Publication Number Publication Date
JPS5762965A true JPS5762965A (en) 1982-04-16
JPS6056273B2 JPS6056273B2 (en) 1985-12-09

Family

ID=15185914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55136889A Expired JPS6056273B2 (en) 1980-09-30 1980-09-30 Method and device for detecting resistance of high voltage cord in ignition circuit

Country Status (1)

Country Link
JP (1) JPS6056273B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6426165A (en) * 1987-07-22 1989-01-27 Shimadzu Corp Speed detecting device
JPH05346435A (en) * 1992-06-16 1993-12-27 Railway Technical Res Inst Speed detecting method

Also Published As

Publication number Publication date
JPS6056273B2 (en) 1985-12-09

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