FR2447461A1 - Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply - Google Patents

Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply

Info

Publication number
FR2447461A1
FR2447461A1 FR7901634A FR7901634A FR2447461A1 FR 2447461 A1 FR2447461 A1 FR 2447461A1 FR 7901634 A FR7901634 A FR 7901634A FR 7901634 A FR7901634 A FR 7901634A FR 2447461 A1 FR2447461 A1 FR 2447461A1
Authority
FR
France
Prior art keywords
controlling
air supply
additional air
exhaust gas
catalyst deactivation
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.)
Granted
Application number
FR7901634A
Other languages
French (fr)
Other versions
FR2447461B1 (en
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR7901634A priority Critical patent/FR2447461A1/en
Publication of FR2447461A1 publication Critical patent/FR2447461A1/en
Application granted granted Critical
Publication of FR2447461B1 publication Critical patent/FR2447461B1/fr
Granted 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
    • F01N3/227—Control of additional air supply only, e.g. using by-passes or variable air pump drives using pneumatically operated valves, e.g. membrane valves
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Device is claimed for improving the operation of a catalytic converters in the exhaust system of a vehicle running on leaded fuel, in which a pump is provided for injecting additional air (or other oxidising agent) into the exhaust gas. The device comprises a valve for interrupting the additional air supply upstream of the catalytic converter, the valve being actuated by at least one controller in response to the full-load running conditions of the engine and/or the temp. of the catalytic converter. Periodic interruption of the air supply produces reducing conditions in the catalytic converter, thus regenerating catalysts which have become partially deactivated by Pb poisoning.
FR7901634A 1979-01-23 1979-01-23 Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply Granted FR2447461A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7901634A FR2447461A1 (en) 1979-01-23 1979-01-23 Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7901634A FR2447461A1 (en) 1979-01-23 1979-01-23 Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply

Publications (2)

Publication Number Publication Date
FR2447461A1 true FR2447461A1 (en) 1980-08-22
FR2447461B1 FR2447461B1 (en) 1982-06-25

Family

ID=9221077

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901634A Granted FR2447461A1 (en) 1979-01-23 1979-01-23 Controlling catalyst deactivation in exhaust gas converter - with device for controlling additional air supply

Country Status (1)

Country Link
FR (1) FR2447461A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062555A1 (en) * 1981-04-02 1982-10-13 Canadian Fram Limited Pressure control system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849984A (en) * 1972-04-19 1974-11-26 Toyota Motor Co Ltd Member for controlling exhaust gas purifying device
US3921396A (en) * 1973-11-20 1975-11-25 Toyota Motor Co Ltd Exhaust gas purification system
GB1474916A (en) * 1974-10-14 1977-05-25 British Leyland Uk Ltd Catalyst systems and diaphragm operated valves for use in such systems
GB1482990A (en) * 1973-09-04 1977-08-17 Nissan Motor Secondary air supply control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849984A (en) * 1972-04-19 1974-11-26 Toyota Motor Co Ltd Member for controlling exhaust gas purifying device
GB1482990A (en) * 1973-09-04 1977-08-17 Nissan Motor Secondary air supply control device
US3921396A (en) * 1973-11-20 1975-11-25 Toyota Motor Co Ltd Exhaust gas purification system
GB1474916A (en) * 1974-10-14 1977-05-25 British Leyland Uk Ltd Catalyst systems and diaphragm operated valves for use in such systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062555A1 (en) * 1981-04-02 1982-10-13 Canadian Fram Limited Pressure control system

Also Published As

Publication number Publication date
FR2447461B1 (en) 1982-06-25

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Legal Events

Date Code Title Description
ST Notification of lapse