JPS6453046A - Secondary air quantity controller for internal combustion engine - Google Patents

Secondary air quantity controller for internal combustion engine

Info

Publication number
JPS6453046A
JPS6453046A JP20450187A JP20450187A JPS6453046A JP S6453046 A JPS6453046 A JP S6453046A JP 20450187 A JP20450187 A JP 20450187A JP 20450187 A JP20450187 A JP 20450187A JP S6453046 A JPS6453046 A JP S6453046A
Authority
JP
Japan
Prior art keywords
secondary air
catalytic converter
oxygen sensor
ecu
air quantity
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
JP20450187A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Miyake
Osamu Horie
Akira Takahashi
Toru Hashimoto
Yasuyuki Makikawa
Minoru Nishida
Hideaki Katashiba
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.)
Mitsubishi Electric Corp
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Motors 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 Mitsubishi Electric Corp, Mitsubishi Motors Corp filed Critical Mitsubishi Electric Corp
Priority to JP20450187A priority Critical patent/JPS6453046A/en
Publication of JPS6453046A publication Critical patent/JPS6453046A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/16—Oxygen
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen

Abstract

PURPOSE:To make exhaust emission control by a catalytic converter performable in an effective manner by controlling a secondary air quantity on the basis of output out of a linear oxygen content sensor. CONSTITUTION:At the time of oxygen sensor feedback by an upstream oxygen sensor 17 installed in a part at the upstream side of a catalytic converter 9, an electronic control unit (ECU) forcibly varies an air-fuel ratio at the required period and amplitude according to the driving state of an engine E. Then, the ECU controls a secondary air quantity out of a secondary air supply device 45 on the basis of output out of a downstream oxygen sensor 18 so as to cause an output level of this downstream oxygen sensor 18 as a linear oxygen content sensor installed in a part at the downstream side of the catalytic converter 9 by this variation to becomes an almost flat waveform withing the level range. Here the ECU is provided with a richness compensating device making a mean air-fuel ratio into richness when secondary air lead-in time will not come to be positive. With this constitution, an oxygen storage effect inherent in the catalytic converter 9 is well utilized and thereby effective emission control is made performable.
JP20450187A 1987-08-18 1987-08-18 Secondary air quantity controller for internal combustion engine Pending JPS6453046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20450187A JPS6453046A (en) 1987-08-18 1987-08-18 Secondary air quantity controller for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20450187A JPS6453046A (en) 1987-08-18 1987-08-18 Secondary air quantity controller for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS6453046A true JPS6453046A (en) 1989-03-01

Family

ID=16491575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20450187A Pending JPS6453046A (en) 1987-08-18 1987-08-18 Secondary air quantity controller for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS6453046A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105923U (en) * 1991-02-20 1992-09-11 日産自動車株式会社 Engine secondary air supply system
US5381658A (en) * 1992-11-13 1995-01-17 Toyota Jidosha Kabushiki Kaisha Diagnostic apparatus for use in an exhaust system of an internal combustion engine
EP0824182A1 (en) * 1996-08-15 1998-02-18 Toyota Jidosha Kabushiki Kaisha A method and a device for purifying exhaust gas of an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105923U (en) * 1991-02-20 1992-09-11 日産自動車株式会社 Engine secondary air supply system
US5381658A (en) * 1992-11-13 1995-01-17 Toyota Jidosha Kabushiki Kaisha Diagnostic apparatus for use in an exhaust system of an internal combustion engine
EP0824182A1 (en) * 1996-08-15 1998-02-18 Toyota Jidosha Kabushiki Kaisha A method and a device for purifying exhaust gas of an internal combustion engine
US5979157A (en) * 1996-08-15 1999-11-09 Toyota Jidosha Kabushiki Kaisha Method and a device for purifying exhaust gas of an internal combustion engine

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