FR2250380A5 - Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp. - Google Patents

Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp.

Info

Publication number
FR2250380A5
FR2250380A5 FR7331774A FR7331774A FR2250380A5 FR 2250380 A5 FR2250380 A5 FR 2250380A5 FR 7331774 A FR7331774 A FR 7331774A FR 7331774 A FR7331774 A FR 7331774A FR 2250380 A5 FR2250380 A5 FR 2250380A5
Authority
FR
France
Prior art keywords
exhaust
exhaust gas
bypass
reduction system
chambers
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.)
Expired
Application number
FR7331774A
Other languages
French (fr)
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.)
PEUGEOT and RENAULT
Original Assignee
PEUGEOT and RENAULT
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 PEUGEOT and RENAULT filed Critical PEUGEOT and RENAULT
Priority to FR7331774A priority Critical patent/FR2250380A5/en
Application granted granted Critical
Publication of FR2250380A5 publication Critical patent/FR2250380A5/en
Expired 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
    • F01N3/20—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
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N2390/00—Arrangements for controlling or regulating exhaust apparatus
    • F01N2390/04—Arrangements for controlling or regulating exhaust apparatus using electropneumatic components
    • 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
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture

Landscapes

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

Abstract

The exhaust gases from the engine (3) pass through the exhaust pipe (4) into the catalytic chambers (7a) and (7b). If the exhaust gas temperature is too high there is a risk of permanent damage to the chambers (7a) and (7b). To avoid this danger, a sensor (25) is fitted to the exhaust pipe and senses an excess of oxygen which occurs when the exhaust gas temperature is above normal. The signal from the sensor (25) is used to operate the servo valve (19) which in turn reduces the pressure under the piston (13) of the valve (14) so that it opens the valve seat (11) in the bypass line (8) and closes the valve seat (10) leading to the catalytic chambers (7a) and (7b).
FR7331774A 1973-09-03 1973-09-03 Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp. Expired FR2250380A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7331774A FR2250380A5 (en) 1973-09-03 1973-09-03 Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7331774A FR2250380A5 (en) 1973-09-03 1973-09-03 Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp.

Publications (1)

Publication Number Publication Date
FR2250380A5 true FR2250380A5 (en) 1975-05-30

Family

ID=9124565

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7331774A Expired FR2250380A5 (en) 1973-09-03 1973-09-03 Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp.

Country Status (1)

Country Link
FR (1) FR2250380A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2984408A1 (en) * 2011-12-15 2013-06-21 Peugeot Citroen Automobiles Sa Method for cleaning exhaust gases from internal combustion engine of car, involves determining oxygen concentration of exhaust gas, and deflecting gas to bypass line when oxygen concentration is greater than or equal to reference value

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2984408A1 (en) * 2011-12-15 2013-06-21 Peugeot Citroen Automobiles Sa Method for cleaning exhaust gases from internal combustion engine of car, involves determining oxygen concentration of exhaust gas, and deflecting gas to bypass line when oxygen concentration is greater than or equal to reference value

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Legal Events

Date Code Title Description
ST Notification of lapse