JPS55104537A - Pulse-width calculating circuit for use in electronically controlled fuel injection system - Google Patents

Pulse-width calculating circuit for use in electronically controlled fuel injection system

Info

Publication number
JPS55104537A
JPS55104537A JP1205379A JP1205379A JPS55104537A JP S55104537 A JPS55104537 A JP S55104537A JP 1205379 A JP1205379 A JP 1205379A JP 1205379 A JP1205379 A JP 1205379A JP S55104537 A JPS55104537 A JP S55104537A
Authority
JP
Japan
Prior art keywords
transistor
circuit
flow meter
fuel injection
hot
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.)
Pending
Application number
JP1205379A
Other languages
Japanese (ja)
Inventor
Takaaki Shinagawa
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 Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP1205379A priority Critical patent/JPS55104537A/en
Publication of JPS55104537A publication Critical patent/JPS55104537A/en
Pending 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor

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 Velocity Or Acceleration (AREA)

Abstract

PURPOSE:To provide a calculating circuit for use in an electronically controlled fuel injection system utilizing a hot-wire type flow meter as air-flow meter, which is capable of producing a standard fuel injection pulse proportional to the flow rate of intake air measured by the hot-wire type flow meter but inversely proportional to the revolutional speed of engine. CONSTITUTION:Input terminals of the first and the second switching circuits 1, 2, constituting a two-condition switching means, are connected to a dividing point (between R2 and R3) where output voltage of the emitter of transistor Q1 in a buffer amplifier consisting of resistance R1 and transistor Q1 and afforded with a signal representing the revolutional speed of engine is divided. Further, output voltage V of a hot-wire type flow meter (not shown) is impressed to tangential approximating circuit 3 constituting a charging control circuit via a buffer amplifier consisting of resistances R12, R13 and transistor Q8, and the collector of transistor Q9 in constant-current charging circuit 4 is connected to the output terminal of circuit 3. The collector of transistor Q11 in charging circuit 4 is connected to P- terminal of integrating capacitor C1, whereas Q-terminal of the capacitor C1 is connected to pulse generating circuit 7.
JP1205379A 1979-02-05 1979-02-05 Pulse-width calculating circuit for use in electronically controlled fuel injection system Pending JPS55104537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1205379A JPS55104537A (en) 1979-02-05 1979-02-05 Pulse-width calculating circuit for use in electronically controlled fuel injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1205379A JPS55104537A (en) 1979-02-05 1979-02-05 Pulse-width calculating circuit for use in electronically controlled fuel injection system

Publications (1)

Publication Number Publication Date
JPS55104537A true JPS55104537A (en) 1980-08-11

Family

ID=11794852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1205379A Pending JPS55104537A (en) 1979-02-05 1979-02-05 Pulse-width calculating circuit for use in electronically controlled fuel injection system

Country Status (1)

Country Link
JP (1) JPS55104537A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798811A (en) * 1980-10-11 1982-06-19 Bosch Gmbh Robert Electronic fuel feed controller
JPS63280830A (en) * 1987-05-12 1988-11-17 Mitsubishi Electric Corp Fuel controller for internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798811A (en) * 1980-10-11 1982-06-19 Bosch Gmbh Robert Electronic fuel feed controller
JPH0243909B2 (en) * 1980-10-11 1990-10-02 Bosch Gmbh Robert
JPS63280830A (en) * 1987-05-12 1988-11-17 Mitsubishi Electric Corp Fuel controller for internal combustion engine

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