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GB1446059A - Methods of and devices for controlling exhaust gas composition - Google Patents

Methods of and devices for controlling exhaust gas composition

Info

Publication number
GB1446059A
GB1446059A GB4520473A GB4520473A GB1446059A GB 1446059 A GB1446059 A GB 1446059A GB 4520473 A GB4520473 A GB 4520473A GB 4520473 A GB4520473 A GB 4520473A GB 1446059 A GB1446059 A GB 1446059A
Authority
GB
United Kingdom
Prior art keywords
engine
regulator
range
exhaust
fuel
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
GB4520473A
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 GB1446059A publication Critical patent/GB1446059A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/148—Using a plurality of comparators
    • 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
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

1446059 Automatic control of IC engine exhaust composition ROBERT BOSCH GmbH 27 Sept 1973 [28 Sept 1973] 45204/73 Heading G3R A device for controlling the composition of the exhaust of an internal combustion engine includes a regulator controlling the fuel-air ratio to the engine in accordance with a measured exhaust composition, the control range of the regulator being adjusted if the regulator output passes through a given threshold value. In the embodiment, a transistor switching circuit varies the duration of fuel injection to the engine according to the engine temperature as sensed by an NTC resistor the air-flow to the engine and the oxygen content of the engine exhaust. The output of the oxygen sensor is amplified, integrated in a direction according to whether the fuel-air ratio is above or below a given value, and fed as a signal 82 to the regulator, whose normal control range is 80 to 81. If under certain engine conditions e.g. when hot starting the engine, the integration for example exceeds a given value 88 the control range is shifted to between 80 and 84. When it drops below 85 the range is returned to its normal value. Similarly, if the integration falls below 87 the range may be shifted downwards. The device is described in detail with reference to Figs. 1 to 5 (not shown).
GB4520473A 1972-09-28 1973-09-27 Methods of and devices for controlling exhaust gas composition Expired GB1446059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2247656A DE2247656C3 (en) 1972-09-28 1972-09-28 Device for regulating the ratio of the fuel and air components of the operating mixture of an internal combustion engine

Publications (1)

Publication Number Publication Date
GB1446059A true GB1446059A (en) 1976-08-11

Family

ID=5857658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4520473A Expired GB1446059A (en) 1972-09-28 1973-09-27 Methods of and devices for controlling exhaust gas composition

Country Status (8)

Country Link
US (1) US3871338A (en)
JP (1) JPS5834654B2 (en)
DE (1) DE2247656C3 (en)
FR (1) FR2201404B1 (en)
GB (1) GB1446059A (en)
IT (1) IT1012082B (en)
NL (1) NL7313336A (en)
SE (1) SE384903B (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313568A1 (en) * 1974-05-24 1976-12-31 Laprade Bernard PROCEDURE AND CONTROL DEVICE FOR A SOLENOID VALVE FOR REGULATING THE DOSAGE OF THE AIR-GASOLINE MIXTURE OF INTERNAL COMBUSTION ENGINES
JPS5155824A (en) * 1974-11-12 1976-05-17 Nissan Motor Nainenkikanno nenryoseigyosochi
JPS5834657B2 (en) * 1975-05-12 1983-07-28 日産自動車株式会社 Air fuel ratio control device
JPS5222615A (en) * 1975-08-15 1977-02-21 Toyota Motor Corp Fuel supply process and supply device of rotary piston engine
GB1568960A (en) * 1975-10-22 1980-06-11 Lucas Industries Ltd Fuel control system for an internal combustion engine
JPS5840010B2 (en) * 1975-12-27 1983-09-02 日産自動車株式会社 Kuunenpiseigiyosouchi
JPS5289521U (en) * 1975-12-27 1977-07-04
JPS5819318Y2 (en) * 1976-03-08 1983-04-20 日産自動車株式会社 Air fuel ratio control device
US4192268A (en) * 1976-05-28 1980-03-11 Nippon Soken, Inc. Air flow amount adjusting system for an internal combustion engine
GB1571255A (en) * 1976-05-28 1980-07-09 Nippon Soken Internal combustion engines
US4279231A (en) * 1977-02-11 1981-07-21 Acf Industries, Incorporated Apparatus for controlling the air-fuel ratio in an internal combustion engine
JPS5833385B2 (en) * 1977-09-12 1983-07-19 トヨタ自動車株式会社 fuel injection control device
US4265208A (en) * 1979-05-16 1981-05-05 General Motors Corporation Closed loop air-fuel ratio controller with air bleed control
US5539638A (en) * 1993-08-05 1996-07-23 Pavilion Technologies, Inc. Virtual emissions monitor for automobile
US5386373A (en) * 1993-08-05 1995-01-31 Pavilion Technologies, Inc. Virtual continuous emission monitoring system with sensor validation
US5970426A (en) * 1995-09-22 1999-10-19 Rosemount Analytical Inc. Emission monitoring system
SG138496A1 (en) * 2006-06-28 2008-01-28 Yao San Lin Petrol saving structure of a motor vehicle
DE102014209587B4 (en) * 2014-05-20 2016-03-31 Continental Automotive Gmbh Characterization of a measurement channel for measuring a feedback signal generated by an operating fuel injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116097B2 (en) * 1971-04-02 1981-01-29 Bosch Gmbh Robert Device for regulating the air ratio λ of the fuel-air mixture fed to an internal combustion engine
US3738341A (en) * 1969-03-22 1973-06-12 Philips Corp Device for controlling the air-fuel ratio {80 {11 in a combustion engine
NL156787B (en) * 1969-03-22 1978-05-16 Philips Nv DEVICE FOR THE AUTOMATIC REGULATION OF THE AIR-FUEL RATIO OF THE MIXTURE FEEDED TO AN COMBUSTION ENGINE.
DE2204192C3 (en) * 1972-01-29 1979-03-22 Robert Bosch Gmbh, 7000 Stuttgart Device for improving the exhaust gases of a carburetor internal combustion engine
DE2206276C3 (en) * 1972-02-10 1981-01-15 Robert Bosch Gmbh, 7000 Stuttgart Method and device for reducing harmful components of exhaust gas emissions from internal combustion engines

Also Published As

Publication number Publication date
JPS4993727A (en) 1974-09-06
FR2201404B1 (en) 1982-10-08
DE2247656A1 (en) 1974-04-11
DE2247656C3 (en) 1981-12-17
US3871338A (en) 1975-03-18
FR2201404A1 (en) 1974-04-26
DE2247656B2 (en) 1981-04-09
JPS5834654B2 (en) 1983-07-28
SE384903B (en) 1976-05-24
IT1012082B (en) 1977-03-10
NL7313336A (en) 1974-04-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee