GB1518428A - Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition - Google Patents

Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition

Info

Publication number
GB1518428A
GB1518428A GB1676676A GB1676676A GB1518428A GB 1518428 A GB1518428 A GB 1518428A GB 1676676 A GB1676676 A GB 1676676A GB 1676676 A GB1676676 A GB 1676676A GB 1518428 A GB1518428 A GB 1518428A
Authority
GB
United Kingdom
Prior art keywords
engine
amplifiers
control signal
idling
closed
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
GB1676676A
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of GB1518428A publication Critical patent/GB1518428A/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)
    • F02D41/1483—Proportional component

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)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Abstract

1518428 Automatic control of engine exhaust NISSAN MOTOR CO Ltd 26 April 1976 [24 April 1975] 16766/76 Heading G3R In a system in which the air/fuel ratio supplied to an I.C. engine is adjusted by a control signal in response to an exhaust gas sensor, the control signal is reduced when engine parameters indicate that the engine is idling. The object is to prevent hunting in these conditions. The system has an oxygen sensor 15 whose output is compared at 16 with a fixed reference to produce a high or low voltage according to whether the mixture is below or above stoichiometric, this voltage being supplied to P, 18 and I, 19 amplifiers whose outputs are combined at 23 and compared at 24 with a triangular waveform to produce square pulses to actuate a fuel injector or adjust a carburetter 10. When a transistor switch 27 connected to the throttle and a speed sensor 28 both indicate idling a NAND gate 21 opens gates Gl, G2 in the input resistor networks to the amplifiers, thereby increasing the input impedance and reducing the respective outputs, the combination of which constitutes the "control signal" of the claims. The gates may alternatively be on the output of the amplifiers.
GB1676676A 1975-04-24 1976-04-26 Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition Expired GB1518428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4917475A JPS51124739A (en) 1975-04-24 1975-04-24 An air fuel ratio control apparatus

Publications (1)

Publication Number Publication Date
GB1518428A true GB1518428A (en) 1978-07-19

Family

ID=12823685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1676676A Expired GB1518428A (en) 1975-04-24 1976-04-26 Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition

Country Status (4)

Country Link
JP (1) JPS51124739A (en)
CA (1) CA1096469A (en)
DE (1) DE2617527A1 (en)
GB (1) GB1518428A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168178A (en) * 1984-10-22 1986-06-11 Fuji Heavy Ind Ltd Air-fuel ratio control system

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS529724A (en) * 1975-07-14 1977-01-25 Nippon Soken Inc Air-fuel ratio adjusting device
JPS5337826U (en) * 1976-09-07 1978-04-03
US4191151A (en) * 1978-03-20 1980-03-04 General Motors Corporation Oxygen sensor signal processing circuit for a closed loop air/fuel mixture controller
US4365599A (en) * 1979-05-09 1982-12-28 Nissan Motor Company, Limited Open and closed loop engine idling speed control method and system for an automotive internal combustion engine
JPS5623549A (en) * 1979-08-02 1981-03-05 Fuji Heavy Ind Ltd Air-fuel ratio controller
JPS57108436A (en) * 1980-12-25 1982-07-06 Fuji Heavy Ind Ltd Speed controller of engine
JPS5951150A (en) * 1982-09-16 1984-03-24 Nissan Motor Co Ltd Control of idle revolution speed of internal-combustion engine
JPS6038526A (en) * 1983-08-11 1985-02-28 Fuji Heavy Ind Ltd Controller of air-fuel ratio
JPS6088839A (en) * 1983-10-20 1985-05-18 Honda Motor Co Ltd Method of controlling operation characteristic quantity for operation control means of internal-combustion engine
JPS60116053U (en) * 1984-01-17 1985-08-06 日本電子機器株式会社 Air-fuel ratio control device for internal combustion engines
JPS59177757U (en) * 1984-05-02 1984-11-28 愛三工業株式会社 Internal combustion engine exhaust gas purification device
JPH0730727B2 (en) * 1986-10-08 1995-04-10 マツダ株式会社 Air-fuel ratio controller for engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS5213273B2 (en) * 1973-06-27 1977-04-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168178A (en) * 1984-10-22 1986-06-11 Fuji Heavy Ind Ltd Air-fuel ratio control system

Also Published As

Publication number Publication date
DE2617527A1 (en) 1976-11-04
JPS51124739A (en) 1976-10-30
CA1096469A (en) 1981-02-24

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19960425