JPS57193739A - Control device of air-fuel ratio in internal combustion engine - Google Patents

Control device of air-fuel ratio in internal combustion engine

Info

Publication number
JPS57193739A
JPS57193739A JP7783481A JP7783481A JPS57193739A JP S57193739 A JPS57193739 A JP S57193739A JP 7783481 A JP7783481 A JP 7783481A JP 7783481 A JP7783481 A JP 7783481A JP S57193739 A JPS57193739 A JP S57193739A
Authority
JP
Japan
Prior art keywords
circuit
signal
signals
fuel
frequency
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
JP7783481A
Other languages
Japanese (ja)
Inventor
Nobuaki Kitano
Nobuaki Kawai
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
Original Assignee
Toyota Motor Corp
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 filed Critical Toyota Motor Corp
Priority to JP7783481A priority Critical patent/JPS57193739A/en
Publication of JPS57193739A publication Critical patent/JPS57193739A/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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control
    • F02D41/2458—Learning of the air-fuel ratio control with an additional dither signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To perform optimum control of a slow passage, by intermittently opening and closing a fuel control solenoid valve through a prescribed frequency and controlling an air bypass valve to be opened when a rich state is detected by an O2 sensor. CONSTITUTION:A rich signal of an O2 sensor 9 opens a throttle valve 7, and is fed to an AND circuit 19 together with output of an oscillator 11 while inverted by an inverter 29. On the other hand, a deceleration fuel arithmetic unit 14 outputs decision signals SN1 and Sg1 of speed and negative pressure by signals of speed sensors 12, 13, and said decision signals are input to an AND circuit 21 through an OR circuit 20. While a high load decision circuit 17 outputs SN2 and Sg2, and these signals pass through an OR circuit 22, inverter 23 and OR circuit 24, and are obtained with OR respectively in OR circuits 25, 28 with a water temperature sensor 18 signal and speed signal 27, then a driver circuit 26 drives a solenoid valve 6. Accordingly, fuel of a constant flow by a lean signal is interrupted by a rich signal synchronously with a frequency signal of the oscillator 11, and its frequency is changed, thus change width of a flow can be set.
JP7783481A 1981-05-22 1981-05-22 Control device of air-fuel ratio in internal combustion engine Pending JPS57193739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7783481A JPS57193739A (en) 1981-05-22 1981-05-22 Control device of air-fuel ratio in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7783481A JPS57193739A (en) 1981-05-22 1981-05-22 Control device of air-fuel ratio in internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57193739A true JPS57193739A (en) 1982-11-29

Family

ID=13645065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7783481A Pending JPS57193739A (en) 1981-05-22 1981-05-22 Control device of air-fuel ratio in internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57193739A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61187570A (en) * 1985-02-16 1986-08-21 Honda Motor Co Ltd Intake secondary air feeder of internal-combustion engine
JPS6278462A (en) * 1985-09-30 1987-04-10 Honda Motor Co Ltd Suction secondary air feeding device for internal combustion engine
WO1998035149A1 (en) * 1997-02-10 1998-08-13 Siemens Automotive S.A. Method for controlling an internal combustion engine equipped with a device for recycling exhaust gases

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61187570A (en) * 1985-02-16 1986-08-21 Honda Motor Co Ltd Intake secondary air feeder of internal-combustion engine
JPS6278462A (en) * 1985-09-30 1987-04-10 Honda Motor Co Ltd Suction secondary air feeding device for internal combustion engine
WO1998035149A1 (en) * 1997-02-10 1998-08-13 Siemens Automotive S.A. Method for controlling an internal combustion engine equipped with a device for recycling exhaust gases
FR2759415A1 (en) * 1997-02-10 1998-08-14 Siemens Automotive Sa METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE PROVIDED WITH AN EXHAUST GAS RECIRCULATION DEVICE

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