GB1437748A - Electronically controlled fuel injection system - Google Patents

Electronically controlled fuel injection system

Info

Publication number
GB1437748A
GB1437748A GB3819774A GB3819774A GB1437748A GB 1437748 A GB1437748 A GB 1437748A GB 3819774 A GB3819774 A GB 3819774A GB 3819774 A GB3819774 A GB 3819774A GB 1437748 A GB1437748 A GB 1437748A
Authority
GB
United Kingdom
Prior art keywords
count
counter
oscillator
stable
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.)
Expired
Application number
GB3819774A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1437748A publication Critical patent/GB1437748A/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
    • F02D41/24—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
    • 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

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

1437748 Automatic control of fuel injection in IC engines HITACHI Ltd 2 Sept 1974 [3 Sept 1973] 38197/74 Heading G3N A fuel injection system includes a pulse oscillator 10 producing pulses whose frequency varies with the inlet air-flow rate measured by meter 3. A rotation detector 12, typically the ignition distributor provides pulses proportional to engine speed which are used to set and reset bi-stable 13. In operation when bi-stable 13 is set the pulses out of oscillator 10 count up counter 11 until the next rotation pulse arrives which resets bi-stable 13 and allows higher frequency oscillator 14 to count down the counter 11. During this count down period the output AND gate is enabled to operate the fuel injector. In a modification, Fig. 5 (not shown) the up/ down counter is replaced by a latching circuit which holds the count until a comparator counter, energized from a higher frequency oscillator, reaches the stored count. The injection again occurs whilst the output of the higher frequency oscillator is being counted.
GB3819774A 1973-09-03 1974-09-02 Electronically controlled fuel injection system Expired GB1437748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9817973A JPS5052435A (en) 1973-09-03 1973-09-03

Publications (1)

Publication Number Publication Date
GB1437748A true GB1437748A (en) 1976-06-03

Family

ID=14212789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3819774A Expired GB1437748A (en) 1973-09-03 1974-09-02 Electronically controlled fuel injection system

Country Status (2)

Country Link
JP (1) JPS5052435A (en)
GB (1) GB1437748A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254744A (en) * 1977-06-30 1981-03-10 Nissan Motor Company, Limited Method and apparatus for measuring air quantity in relation to engine speed

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362027A (en) * 1976-11-16 1978-06-03 Toyota Motor Corp Digital type fuel-injection control system
DE2824007A1 (en) * 1978-06-01 1979-12-13 Bosch Gmbh Robert METHOD AND CIRCUIT ARRANGEMENT FOR GENERATING FUEL METERING PULSES FOR A COMBUSTION ENGINE
DE2834796A1 (en) * 1978-08-09 1980-02-21 Bosch Gmbh Robert Control microprocessor for ignition and fuel injection in IC engine - depends on count processes performed by input-output unit to reduce number of bits needed
JPS57129229A (en) * 1981-02-05 1982-08-11 Nissan Motor Co Ltd Electronic control fuel injector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254744A (en) * 1977-06-30 1981-03-10 Nissan Motor Company, Limited Method and apparatus for measuring air quantity in relation to engine speed

Also Published As

Publication number Publication date
JPS5052435A (en) 1975-05-09

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Legal Events

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

Effective date: 19930902