JPS5532947A - Method and apparatus for treating exhaust gas - Google Patents

Method and apparatus for treating exhaust gas

Info

Publication number
JPS5532947A
JPS5532947A JP10454078A JP10454078A JPS5532947A JP S5532947 A JPS5532947 A JP S5532947A JP 10454078 A JP10454078 A JP 10454078A JP 10454078 A JP10454078 A JP 10454078A JP S5532947 A JPS5532947 A JP S5532947A
Authority
JP
Japan
Prior art keywords
temperature
catalyst
secondary air
output
excited
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
JP10454078A
Other languages
Japanese (ja)
Inventor
Shinkichi Nakamura
Kiroku Shimura
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 JP10454078A priority Critical patent/JPS5532947A/en
Publication of JPS5532947A publication Critical patent/JPS5532947A/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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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

Abstract

PURPOSE:To treat exhaust gas with simplified apparatus by preventing the rise of temperature by interrupting exactly secondary air injection even when the temperature of catalyst is abruptly risen and also by continuing the secondary air injection even at the time of low temperature. CONSTITUTION:When starting engine when the temperature of catalyst is lowered, the catalyst temperature is rapidly risen and the internal resistance of the catalyst tamperature sensor 21 is smaller, whereby the output V2 from the differential amplifier 23 is rapidly reduced and the output V3 from the differentiating circuit 24 approximates from minus infinty to zero. When the output V4 of the differentiating circuit 24 reaches a value below the judged voltage V at the decisive device 26, the solenoid 17 is excited through the power amplifier 27. In short, even when the catalyst temperature does not reach a fixed value, the solenoid 17 is excited when the rising rate of temperature is great, negative pressure is introduced into the actuator 8 through the switching valve 16, and the secondary air supply conduit 6 can be closed by the valve 7.
JP10454078A 1978-08-28 1978-08-28 Method and apparatus for treating exhaust gas Pending JPS5532947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10454078A JPS5532947A (en) 1978-08-28 1978-08-28 Method and apparatus for treating exhaust gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10454078A JPS5532947A (en) 1978-08-28 1978-08-28 Method and apparatus for treating exhaust gas

Publications (1)

Publication Number Publication Date
JPS5532947A true JPS5532947A (en) 1980-03-07

Family

ID=14383316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10454078A Pending JPS5532947A (en) 1978-08-28 1978-08-28 Method and apparatus for treating exhaust gas

Country Status (1)

Country Link
JP (1) JPS5532947A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387565A (en) * 1980-03-24 1983-06-14 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas cleaning system for multi-cylinder internal combustion engine
JPS59188020A (en) * 1983-03-17 1984-10-25 Mazda Motor Corp Device for preventing catalyst from being overheated in engine
US4727717A (en) * 1980-12-03 1988-03-01 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas cleaning system for multi-cylinder internal combustion engines
US5060474A (en) * 1989-07-26 1991-10-29 Nissan Motor Company, Limited Exhaust emission control failure detection system for internal combustion engine
US5285639A (en) * 1991-07-12 1994-02-15 Japan Electronic Conrol Systems Co., Ltd. Method and system for controlling secondary air for internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387565A (en) * 1980-03-24 1983-06-14 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas cleaning system for multi-cylinder internal combustion engine
US4727717A (en) * 1980-12-03 1988-03-01 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas cleaning system for multi-cylinder internal combustion engines
JPS59188020A (en) * 1983-03-17 1984-10-25 Mazda Motor Corp Device for preventing catalyst from being overheated in engine
JPH0119046B2 (en) * 1983-03-17 1989-04-10 Mazda Motor
US5060474A (en) * 1989-07-26 1991-10-29 Nissan Motor Company, Limited Exhaust emission control failure detection system for internal combustion engine
US5285639A (en) * 1991-07-12 1994-02-15 Japan Electronic Conrol Systems Co., Ltd. Method and system for controlling secondary air for internal combustion engine

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