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

Similar Documents

Publication Publication Date Title
US3662540A (en) Secondary air control in catalytic vehicle exhaust purification system
SE7712171L (en) DEVICE FOR SATURATING THE PARTIAL ACID PRESSURE
GB1450651A (en) Internal combustion engine having an exhaust gas pruifying system
GB1467301A (en) Catalyst unit for engine exhaust system
GB1389638A (en) Poppet valve assemblies
GB1407772A (en) Internal combustion engine with a catalytic exhaust converter
GB1395237A (en) Internal combustion engine exhaust gas purification system
SE8000523L (en) turbocharger
ES8308102A1 (en) Bypass control system.
GB1519467A (en) Exhaust gas purification system for an internal combustiongasoline engine
FR2250380A5 (en) Exhaust gas pollution reduction system - exhaust oxygen detector operates catalytic chambers bypass at high temp.
GB982566A (en) Improvements in or relating to exhaust gas purifiers for internal combustion engines
JPS57179348A (en) Exhaust gas purifying apparatus for internal combustion engine
GB1096611A (en) Improvements in or relating to exhaust systems of internal combustion engines
JPS52149524A (en) Air fuel ratio control device for internal combustion engine
SE7410578L (en)
GB1364785A (en) Method for controlling a turbo compressor
JPS53107526A (en) Exhaust gas re-cycling device
GB1385331A (en) Catalytic reactor in the exhaust system of a motor vehicle
FR2226865A5 (en) Exhaust silencer for automobile engines - has constant area gas passage to prevent back pressure on engine
FR2141473A1 (en) Exhaust gas purifier - for catalytic oxidation of unburnt components
SU425945A1 (en)
JPS55164740A (en) Method and apparatus for reducing nox contained in exhaust gas diesel engine
JPS5484110A (en) Rotary engine
SU487243A1 (en) The method of regulating the boiling point of the liquid in the cooling system of an internal combustion engine

Legal Events

Date Code Title Description
ST Notification of lapse