GB2012989A - Fuel injection control systems - Google Patents

Fuel injection control systems

Info

Publication number
GB2012989A
GB2012989A GB7849251A GB7849251A GB2012989A GB 2012989 A GB2012989 A GB 2012989A GB 7849251 A GB7849251 A GB 7849251A GB 7849251 A GB7849251 A GB 7849251A GB 2012989 A GB2012989 A GB 2012989A
Authority
GB
United Kingdom
Prior art keywords
air flow
engine
period
injection control
fuel injection
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.)
Withdrawn
Application number
GB7849251A
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.)
Repco Ltd
Original Assignee
Repco 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 Repco Ltd filed Critical Repco Ltd
Publication of GB2012989A publication Critical patent/GB2012989A/en
Withdrawn legal-status Critical Current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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
    • 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
    • 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
    • F02D41/2403—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially up/down counters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

A fuel injection control system for an internal combustion engine utilizes a metering unit to continually monitor air flow-rate to the engine and provide a pulse width modulated (PWM) digital signal which has a duty ratio representative of the air flow-rate. The duty ratio is the "on" period of the PWM signal divided by the total cycle period, which period is not related to engine speed. A further electrical signal indicative of engine speed is derived from the vehicle ignition system and the two signals are processed with the aid of a digital processor to provide an injector operating pulse. The system thus avoids use of A/D convertors normally associated with digital processors in this field and has a fast response time at all engine speeds. A means of fuel enrichment for times of rapid throttle opening is also disclosed as well as means for disabling the fuel supply on over-run. The air flow meter comprises a continuously rotating drum (21) having a cut out which passes between a light source and photodetector which is axially displaced against spring 3 by the air flow. Magnetic Hall effect or varie- switched oscillators may be used. <IMAGE>
GB7849251A 1978-01-13 1978-12-20 Fuel injection control systems Withdrawn GB2012989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPD303078 1978-01-13

Publications (1)

Publication Number Publication Date
GB2012989A true GB2012989A (en) 1979-08-01

Family

ID=3767358

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7849251A Withdrawn GB2012989A (en) 1978-01-13 1978-12-20 Fuel injection control systems

Country Status (7)

Country Link
JP (1) JPS54101026A (en)
AU (1) AU4266178A (en)
BR (1) BR7900173A (en)
DE (1) DE2900569A1 (en)
FR (1) FR2414640A1 (en)
GB (1) GB2012989A (en)
IT (1) IT1110070B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521222A1 (en) * 1982-02-10 1983-08-12 Fuji Heavy Ind Ltd FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE
CN113169356A (en) * 2019-02-08 2021-07-23 Avl李斯特有限公司 Method and circuit arrangement for adjusting an injection strategy of an injector of a fuel cell system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5768537A (en) * 1980-10-17 1982-04-26 Nissan Motor Co Ltd Fuel controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521222A1 (en) * 1982-02-10 1983-08-12 Fuji Heavy Ind Ltd FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE
CN113169356A (en) * 2019-02-08 2021-07-23 Avl李斯特有限公司 Method and circuit arrangement for adjusting an injection strategy of an injector of a fuel cell system
CN113169356B (en) * 2019-02-08 2024-05-24 Avl李斯特有限公司 Method and circuit arrangement for adjusting the injection strategy of an injector of a fuel cell system

Also Published As

Publication number Publication date
BR7900173A (en) 1979-08-14
IT1110070B (en) 1985-12-23
IT7919237A0 (en) 1979-01-12
FR2414640A1 (en) 1979-08-10
AU4266178A (en) 1979-07-19
DE2900569A1 (en) 1979-07-19
JPS54101026A (en) 1979-08-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)