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GB1449221A - Control of the composition of exhaust gases of internal combustion engines - Google Patents

Control of the composition of exhaust gases of internal combustion engines

Info

Publication number
GB1449221A
GB1449221A GB4306373A GB4306373A GB1449221A GB 1449221 A GB1449221 A GB 1449221A GB 4306373 A GB4306373 A GB 4306373A GB 4306373 A GB4306373 A GB 4306373A GB 1449221 A GB1449221 A GB 1449221A
Authority
GB
United Kingdom
Prior art keywords
monostable
gate
stable
engine
circuit
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
GB4306373A
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 GB1449221A publication Critical patent/GB1449221A/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
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • 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
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1474—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method by detecting the commutation time of the sensor
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/14—Timing of measurement, e.g. synchronisation of measurements to the engine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/09—Other ways of controlling

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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

1449221 Automatic control of exhaust gases ROBERT BOSCH GmbH 13 Sept 1973 [14 Sept 1972] 43063/73 Heading G3R A control circuit for the fuel supply of an I.C. engine is responsive to the output of an exhaust gas probe after a time during which the engine operating conditions remain constant and the probe output has reached the measured value. The probe may be exposed to the exhaust gas intermittently or continuously depending on the materials used in its construction. The circuit shown is designed to operate when the engine is idling as signalled by a switch 12 as well as speed sensor 13 and switch 9. A temperature sensor 11 ensures that the engine is at its normal operating temperature and prevents operation of the circuit during starting. The ignition switch 14 and differentiating circuit 25, 24 supplies pulses to reset bi-stable stages 21, 28. In operation when the engine is hot the bi-stable 21 is set to apply a signal to the first input of AND gate 22. When idling is sensed then the other inputs of AND gate 22 are energized and monostable 23 is upset to apply 0 and I signals to gate 29 and bi-stable 28 respectively and the latter switches to its set state and puts a 1 signal on AND gate 29. After a predetermined time monostable 23 relapses and provides a 1 signal to AND gate 29 which now conducts and upsets monostable 32 to enable gate 34 or 35 and allow the output of comparator 36 to energize motor 38 to adjust the fuel supply device, injection pump or carburetter, for the engine. The change in fuel is in a direction to bring the composition of the exhaust gas measured by probe 15 into agreement with a predetermined value. If during the upset period of monostable 23 the idling switch 12 is opened the bi-stable 28 is disabled and prevents operation of monostable 32. The second output of monostable 32 disables the bi-stable 21 until the next ignition switch signal. In a modification, Fig. 4 (not shown), the monostable 32 is replaced by a bi-stable circuit (40) which enables the gates in the fuel adjustment circuit on the relapse of monostable 23 but remains in this state until reset by the opening of the idling switch or the comparator 36 output changing state when the desired value is achieved.
GB4306373A 1972-09-14 1973-09-13 Control of the composition of exhaust gases of internal combustion engines Expired GB1449221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2245029A DE2245029C3 (en) 1972-09-14 1972-09-14 Method and device for exhaust gas decontamination from internal combustion engines

Publications (1)

Publication Number Publication Date
GB1449221A true GB1449221A (en) 1976-09-15

Family

ID=5856275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4306373A Expired GB1449221A (en) 1972-09-14 1973-09-13 Control of the composition of exhaust gases of internal combustion engines

Country Status (8)

Country Link
US (1) US3919983A (en)
JP (1) JPS572899B2 (en)
DE (1) DE2245029C3 (en)
FR (1) FR2200441B1 (en)
GB (1) GB1449221A (en)
IT (1) IT1022020B (en)
NL (1) NL7312641A (en)
SE (1) SE388008B (en)

Families Citing this family (34)

* 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
US4170969A (en) * 1974-06-11 1979-10-16 Nissan Motor Company, Limited Air fuel mixture control apparatus for internal combustion engines
USRE31174E (en) * 1974-09-04 1983-03-15 Robert Bosch Gmbh Fuel injection system
DE2442229C3 (en) * 1974-09-04 1980-08-21 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection system for an internal combustion engine
US4109615A (en) * 1974-10-21 1978-08-29 Nissan Motor Company, Limited Apparatus for controlling the ratio of air to fuel of air-fuel mixture of internal combustion engine
JPS5228934B2 (en) * 1974-11-01 1977-07-29
US3948228A (en) * 1974-11-06 1976-04-06 The Bendix Corporation Exhaust gas sensor operational detection system
GB1492284A (en) * 1974-11-06 1977-11-16 Nissan Motor Air fuel mixture control apparatus for internal combustion engines
GB1532959A (en) * 1975-11-06 1978-11-22 Lucas Electrical Ltd Fuel injection system for an internal combustion engine
CA1084143A (en) * 1975-02-25 1980-08-19 Junuthula N. Reddy System controlling any air/fuel ratio with stoichiometric sensor and asymmetrical integration
JPS5924264B2 (en) * 1975-02-27 1984-06-08 カブシキガイシヤ ニツポンジドウシヤブヒンソウゴウケンキユウシヨ Carburetor air-fuel ratio adjustment device
US4173952A (en) * 1975-04-24 1979-11-13 Nissan Motor Company, Limited Closed-loop mixture control system for an internal combustion engine with improved response characteristic to idling condition
US4104998A (en) * 1975-04-25 1978-08-08 Chrysler Corporation Engine control system
US3990411A (en) * 1975-07-14 1976-11-09 Gene Y. Wen Control system for normalizing the air/fuel ratio in a fuel injection system
US4210106A (en) * 1975-10-13 1980-07-01 Robert Bosch Gmbh Method and apparatus for regulating a combustible mixture
JPS5840009B2 (en) * 1975-10-28 1983-09-02 日産自動車株式会社 Kuunenpiseigiyosouchi
US4112880A (en) * 1975-12-27 1978-09-12 Nissan Motor Company, Limited Method of and mixture control system for varying the mixture control point relative to a fixed reference
JPS5840010B2 (en) * 1975-12-27 1983-09-02 日産自動車株式会社 Kuunenpiseigiyosouchi
JPS52114821A (en) * 1976-03-24 1977-09-27 Nissan Motor Co Ltd Air fuel ratio controller
US4158347A (en) * 1976-04-28 1979-06-19 Toyota Jidosha Kogyo Kabushiki Kaisha Fuel supply system for use in internal combustion engine
DE2649272C2 (en) * 1976-05-22 1986-04-03 Robert Bosch Gmbh, 7000 Stuttgart Control method and mixture ratio control device for determining the proportions of a fuel-air mixture fed to an internal combustion engine
JPS586052B2 (en) * 1976-09-06 1983-02-02 日産自動車株式会社 Air fuel ratio control device
IT1081383B (en) * 1977-04-27 1985-05-21 Magneti Marelli Spa ELECTRONIC EQUIPMENT FOR THE CONTROL OF THE POWER OF AN AIR / PETROL MIXTURE OF AN INTERNAL COMBUSTION ENGINE
US4170201A (en) * 1977-05-31 1979-10-09 The Bendix Corporation Dual mode hybrid control for electronic fuel injection system
JPS57105530A (en) * 1980-12-23 1982-07-01 Toyota Motor Corp Air-fuel ratio controlling method for internal combustion engine
JPS60101238A (en) * 1984-10-01 1985-06-05 Nissan Motor Co Ltd Fuel control device in engine
US5386373A (en) * 1993-08-05 1995-01-31 Pavilion Technologies, Inc. Virtual continuous emission monitoring system with sensor validation
US5539638A (en) * 1993-08-05 1996-07-23 Pavilion Technologies, Inc. Virtual emissions monitor for automobile
US5970426A (en) * 1995-09-22 1999-10-19 Rosemount Analytical Inc. Emission monitoring system
EP3395872B1 (en) 2015-12-25 2021-03-03 Nitto Denko Corporation Silicone foam sheet and method of producing the same
JP6666778B2 (en) 2016-04-06 2020-03-18 日東電工株式会社 Adsorption temporary fixing material
JP6934313B2 (en) 2017-04-05 2021-09-15 日東電工株式会社 Adsorption temporary fixing sheet and its manufacturing method
JP6453967B1 (en) 2017-09-28 2019-01-16 日東電工株式会社 Temporary fixing sheet
JP6474474B1 (en) 2017-09-28 2019-02-27 日東電工株式会社 Adsorption temporary fixing sheet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299868A (en) * 1965-09-17 1967-01-24 Henke Lowell Dean Automatic idler
DE1526506A1 (en) * 1966-11-25 1970-03-26 Bosch Gmbh Robert Fuel injection system
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.
US3768259A (en) * 1971-07-06 1973-10-30 Universal Oil Prod Co Control for an engine system
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
DE2216705C3 (en) * 1972-04-07 1978-06-08 Robert Bosch Gmbh, 7000 Stuttgart Method and device for detoxifying the exhaust gases of an internal combustion engine
DE2229928C3 (en) * 1972-06-20 1981-03-19 Robert Bosch Gmbh, 7000 Stuttgart Method and device for reducing harmful components of exhaust gas emissions from internal combustion engines
US3835012A (en) * 1972-08-28 1974-09-10 Bendix Corp Protective shield for oxygen sensor

Also Published As

Publication number Publication date
DE2245029C3 (en) 1981-08-20
DE2245029B2 (en) 1980-11-20
DE2245029A1 (en) 1974-03-21
FR2200441A1 (en) 1974-04-19
IT1022020B (en) 1978-03-20
JPS5047036A (en) 1975-04-26
NL7312641A (en) 1974-03-18
JPS572899B2 (en) 1982-01-19
FR2200441B1 (en) 1976-10-01
SE388008B (en) 1976-09-20
US3919983A (en) 1975-11-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930912