GB1478652A - Method of reducing contamination of exhaust gases - Google Patents

Method of reducing contamination of exhaust gases

Info

Publication number
GB1478652A
GB1478652A GB25410/74A GB2541074A GB1478652A GB 1478652 A GB1478652 A GB 1478652A GB 25410/74 A GB25410/74 A GB 25410/74A GB 2541074 A GB2541074 A GB 2541074A GB 1478652 A GB1478652 A GB 1478652A
Authority
GB
United Kingdom
Prior art keywords
engine
reactor
air
amplifiers
valve
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
GB25410/74A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1478652A publication Critical patent/GB1478652A/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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/222—Control of additional air supply only, e.g. using by-passes or variable air pump drives using electric valves only
    • 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
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/04—Combinations of different methods of purification afterburning and catalytic conversion
    • 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
    • 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
    • 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
    • Y02T10/40—Engine management systems

Abstract

1478652 Reducing exhaust gas pollution ROBERT BOSCH GmbH 7 June 1974 [9 June 1973] 25410/74 Heading B1W [Also in Divisions Fl and G3] A method of reducing exhaust gas contamination of an I.C. engine 11 to whose exhaust manifold 23 are connected in series a first reactor 28 for reducing nitrogen oxides and a second reactor 27 for oxidizing hydrocarbons comprises regulating the air/fuel ratio of the mixture inducted by the engine in response to the temperature of the gases reacted in the first reactor and supplying additional air to the engine exhaust system upstream of one or both reactors at a rate dependent upon the oxygen content of the gas entering the first reactor. A temperature sensor 41 produces a voltage which is amplified by amplifiers 44, 45 to substantially close valve 22 in a by-pass 21 when the engine is cold and when the atmospheric temperature is very low to supply a rich mixture to the engine. This results in a low oxygen content in the exhaust gas leaving the engine which is detected by an oxygen measuring sensor 40 and, by way of amplifiers 42, 43 causes a valve 35 to be opened by a solenoid 39 to supply air from a pump 32 to the exhaust manifold 23 to bring the air number in the reactor 28 into the range 0.985 to 0.995. When the desired catalyst operating temperature is attained the valve 22 opens to allow leaner mixture to reach the engine. The resulting higher oxygen content of the exhaust gases is detected by the sensor 40 and the valve 35 is closed. The pump 32 also supplies air to the oxidizing catalytic reactor 27. Instead of a carburettor with by-pass 21, an electronic or mechanical injection system can be used. The amplifiers 43, 45 act as integrators whose outputs are fed to power amplifiers (46) Fig. 2 (not shown). The two reactors 27, 28 may instead be two beds of a reactor 26.
GB25410/74A 1973-06-09 1974-06-07 Method of reducing contamination of exhaust gases Expired GB1478652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2329539A DE2329539C3 (en) 1973-06-09 1973-06-09 Process for detoxifying the exhaust gases

Publications (1)

Publication Number Publication Date
GB1478652A true GB1478652A (en) 1977-07-06

Family

ID=5883578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25410/74A Expired GB1478652A (en) 1973-06-09 1974-06-07 Method of reducing contamination of exhaust gases

Country Status (3)

Country Link
JP (1) JPS5751525B2 (en)
DE (1) DE2329539C3 (en)
GB (1) GB1478652A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256603A (en) * 1991-06-12 1992-12-16 Ford Motor Co Operation of an internal combustion engine
GB2261613A (en) * 1991-11-22 1993-05-26 Ford Motor Co Operation of an internal combustion engine
US5315823A (en) * 1991-02-12 1994-05-31 Nippondenso Co., Ltd. Control apparatus for speedily warming up catalyst in internal combustion engine
EP1253308A1 (en) * 2001-04-02 2002-10-30 DUCATI ENERGIA S.p.A. Method and apparatus for controlling harmful emissions from internal combustion engines

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401417C2 (en) * 1974-01-12 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Process for detoxifying the exhaust gases of an internal combustion engine
GB1515734A (en) * 1974-10-21 1978-06-28 Nissan Motor Apparatus for controlling the ratio of air to fuel of air-fuel mixture of internal combustion engine
JPS51127919A (en) * 1975-04-28 1976-11-08 Nissan Motor Co Ltd Internal combustion engine with exhaust control device
FR2450946A1 (en) * 1979-03-08 1980-10-03 Peugeot DEVICE FOR PURIFYING EXHAUST GASES FROM AN EXPLOSION ENGINE
EP0212363A3 (en) * 1985-08-22 1988-11-30 Teepak, Inc. Packaging unshirred tubular food casings
DE59004943D1 (en) * 1990-08-01 1994-04-14 Siemens Ag Process for heating a catalytic converter.
JP4612596B2 (en) * 2006-08-22 2011-01-12 要一 手塚 Raw pre-filling processing method and pre-processing machine for raw meat chunk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628606A (en) * 1950-06-24 1953-02-17 Research Corp Control system
US3142967A (en) * 1960-09-23 1964-08-04 Paul H Schweitzer Maximum power seeking automatic control system for power-producing machines
US3696618A (en) * 1971-04-19 1972-10-10 Universal Oil Prod Co Control system for an engine system
DE2202614A1 (en) * 1972-01-20 1973-08-02 Bosch Gmbh Robert EXHAUST GAS AFTER-COMBUSTION DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315823A (en) * 1991-02-12 1994-05-31 Nippondenso Co., Ltd. Control apparatus for speedily warming up catalyst in internal combustion engine
GB2256603A (en) * 1991-06-12 1992-12-16 Ford Motor Co Operation of an internal combustion engine
GB2261613A (en) * 1991-11-22 1993-05-26 Ford Motor Co Operation of an internal combustion engine
EP1253308A1 (en) * 2001-04-02 2002-10-30 DUCATI ENERGIA S.p.A. Method and apparatus for controlling harmful emissions from internal combustion engines

Also Published As

Publication number Publication date
JPS5032315A (en) 1975-03-29
DE2329539A1 (en) 1975-01-02
JPS5751525B2 (en) 1982-11-02
DE2329539C3 (en) 1981-05-21
DE2329539B2 (en) 1980-10-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee