JPS57186040A - Air-fuel ratio feedback controller - Google Patents

Air-fuel ratio feedback controller

Info

Publication number
JPS57186040A
JPS57186040A JP56070830A JP7083081A JPS57186040A JP S57186040 A JPS57186040 A JP S57186040A JP 56070830 A JP56070830 A JP 56070830A JP 7083081 A JP7083081 A JP 7083081A JP S57186040 A JPS57186040 A JP S57186040A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
light sensing
blue
flames
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
JP56070830A
Other languages
Japanese (ja)
Inventor
Tadashi Kirisawa
Teruo Yamauchi
Takashige Ooyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56070830A priority Critical patent/JPS57186040A/en
Publication of JPS57186040A publication Critical patent/JPS57186040A/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/022—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an optical sensor, e.g. in-cylinder light probe

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To perform good responsive feedback control, in air-fuel ratio control of an internal combustion engine, by measuring flame light in a cylinder through plural light sensing diodes and calculating air-fuel ratio from spectral sensitivity characteristics. CONSTITUTION:Flames in a cylinder are colored yellow for a large proportion of fuel, blue for logical air-fuel ratio and blue white for a small proportion. Then a light sensing diode 9, high sensitive for red color, and light sensing diode 10, high sensitive for blue color, are embedded to a spark plug, and flames are directly detected through heat resistant glass, arithmetically operated with their difference in an amplifier 13 through operational amplifiers 11, 12, further linearized by an amplifier 14 to obtain an air-fuel ratio signal. This signal is input to a correction calculator circuit of microcomputer, and its output changes duty ratio of a solenoid valve. In this way, feedback control can be operated promptly after a start with an earlier response than an 02 sensor.
JP56070830A 1981-05-13 1981-05-13 Air-fuel ratio feedback controller Pending JPS57186040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56070830A JPS57186040A (en) 1981-05-13 1981-05-13 Air-fuel ratio feedback controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070830A JPS57186040A (en) 1981-05-13 1981-05-13 Air-fuel ratio feedback controller

Publications (1)

Publication Number Publication Date
JPS57186040A true JPS57186040A (en) 1982-11-16

Family

ID=13442882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070830A Pending JPS57186040A (en) 1981-05-13 1981-05-13 Air-fuel ratio feedback controller

Country Status (1)

Country Link
JP (1) JPS57186040A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288056A2 (en) * 1987-04-21 1988-10-26 Hitachi, Ltd. Control apparatus for internal combustion engines
WO1994017297A1 (en) * 1993-01-28 1994-08-04 Jenbacher Energiesysteme Aktiengesellschaft Arrangement for determining the parameters of an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288056A2 (en) * 1987-04-21 1988-10-26 Hitachi, Ltd. Control apparatus for internal combustion engines
US4887574A (en) * 1987-04-21 1989-12-19 Hitachi, Ltd. Control apparatus for internal combustion engines
USRE34234E (en) * 1987-04-21 1993-04-27 Hitachi, Ltd. Control apparatus for internal combustion engines
WO1994017297A1 (en) * 1993-01-28 1994-08-04 Jenbacher Energiesysteme Aktiengesellschaft Arrangement for determining the parameters of an internal combustion engine

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