JPS57126536A - Secondary air supply unit for internal combustion engine - Google Patents

Secondary air supply unit for internal combustion engine

Info

Publication number
JPS57126536A
JPS57126536A JP56012641A JP1264181A JPS57126536A JP S57126536 A JPS57126536 A JP S57126536A JP 56012641 A JP56012641 A JP 56012641A JP 1264181 A JP1264181 A JP 1264181A JP S57126536 A JPS57126536 A JP S57126536A
Authority
JP
Japan
Prior art keywords
valve
secondary air
air supply
prescribed
supply
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
JP56012641A
Other languages
Japanese (ja)
Inventor
Hiroyuki Matsumura
Nobuaki Kitano
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 JP56012641A priority Critical patent/JPS57126536A/en
Publication of JPS57126536A publication Critical patent/JPS57126536A/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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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)
  • Exhaust-Gas Circulating Devices (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE:To improve the warming-up performance of a catalyst during the low speed and light load period in a secondary air supply unit in which the fuel/air ratio at a catalyst inlet side is prescribed, by closing an EGR valve and also by sending the secondary air only to the exhaust gas passage when the engine temperature is lower than the prescribed one. CONSTITUTION:When the engine temperature is lower than the prescribed one, a temperature sensor 65 sets an electromagnetic valve 64 to the atmospheric side, and closes an EGR valve 50 regardless of the opening of a throttle valve 14 in order to stop the supply of the secondary air to an air supply passage 10, permitting the air to be supplied to an exhaust gas passage 18 only. Next, if the engine temperature becomes higher than the prescribed one, the electromagnetic valve 64 connects an EGR valve negative pressure chamber 54 with a port 70, and an EGR valve 50 is operated depending upon the opening of the throttle valve 14. The secondary air supply is controlled through a signal from an air/fuel ratio sensor 20. If the secondary air supply shortage due to the closure of the EGR valve 50 is foreseen, an electromagnetic valve 34 is operated regardless of the air/fuel ratio sensor 20 in order to connect a supply valve 32 and a negative pressure chamber 38 with the air supply passage 10, thereby opening fully the supply valve 32 for the secondary air supply.
JP56012641A 1981-01-30 1981-01-30 Secondary air supply unit for internal combustion engine Pending JPS57126536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012641A JPS57126536A (en) 1981-01-30 1981-01-30 Secondary air supply unit for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012641A JPS57126536A (en) 1981-01-30 1981-01-30 Secondary air supply unit for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57126536A true JPS57126536A (en) 1982-08-06

Family

ID=11810987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012641A Pending JPS57126536A (en) 1981-01-30 1981-01-30 Secondary air supply unit for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57126536A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181271A (en) * 1989-03-23 1993-01-19 British Telecommunications Public Limited Company Optical fiber storage system and method of installing optical fiber using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181271A (en) * 1989-03-23 1993-01-19 British Telecommunications Public Limited Company Optical fiber storage system and method of installing optical fiber using same

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