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 supplyInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0062555A1 (en) * | 1981-04-02 | 1982-10-13 | Canadian Fram Limited | Pressure control system |
Citations (4)
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 |
-
1979
- 1979-01-23 FR FR7901634A patent/FR2447461A1/en active Granted
Patent Citations (4)
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)
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 |