JPS55104538A - Air-fuel ratio controlling system for internal combustion engine - Google Patents

Air-fuel ratio controlling system for internal combustion engine

Info

Publication number
JPS55104538A
JPS55104538A JP1263479A JP1263479A JPS55104538A JP S55104538 A JPS55104538 A JP S55104538A JP 1263479 A JP1263479 A JP 1263479A JP 1263479 A JP1263479 A JP 1263479A JP S55104538 A JPS55104538 A JP S55104538A
Authority
JP
Japan
Prior art keywords
voltage
comparator
air
electric power
output
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
JP1263479A
Other languages
Japanese (ja)
Inventor
Shinichi Sakamoto
Takao Sasayama
Matsuo Amano
Masayuki Miki
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
Priority to JP1263479A priority Critical patent/JPS55104538A/en
Publication of JPS55104538A publication Critical patent/JPS55104538A/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)

Abstract

PURPOSE:To obtain input signal representing the flow rate of intake air with ease, by varying the magnitude of electric power applied to a temperature-sensitive resistor disposed in the intake passage, representing the electric power by a pulse train, measuring the time ratio and others, and carrying out control for the measuring time in an electronic control circuit. CONSTITUTION:A temperature-sensitive resistor (electric heat emitting element) 24 constituting a thermal air-flow meter is disposed in air passage 22 located on the upstream side of the throttle valve in the intake passage. Electric power is applied to the resistor 24 by impressing pulse signal to the base terminal of transistor Tr154 such that voltage (reference voltage) at the junction of resistors R160 and R162 is equal to the terminal voltage of capacitor C158. Voltage of heat emitting element 24 is compared with said reference voltage in comparator 164, and after integrating the output at R166 and C168, it is compared with output of saw-tooth wave generating circuit 170 in comparator 172. In case that output of the comparator 172 is L-level, comparator 172 operates to interrupt transistor Tr154 and switch 156, to hold the voltage of capacitor C158 at the level maintained shortly before interruption, and to afford pulse-train signal to the control circuit.
JP1263479A 1979-02-05 1979-02-05 Air-fuel ratio controlling system for internal combustion engine Pending JPS55104538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1263479A JPS55104538A (en) 1979-02-05 1979-02-05 Air-fuel ratio controlling system for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1263479A JPS55104538A (en) 1979-02-05 1979-02-05 Air-fuel ratio controlling system for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS55104538A true JPS55104538A (en) 1980-08-11

Family

ID=11810804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1263479A Pending JPS55104538A (en) 1979-02-05 1979-02-05 Air-fuel ratio controlling system for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS55104538A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145442A (en) * 1983-12-29 1985-07-31 Fujitsu Ten Ltd Electronic control device for automobile
US4565091A (en) * 1984-04-20 1986-01-21 Nippondenso Co., Ltd. Apparatus for measuring the quantity of airflow passing through an intake passage of an engine
US4665745A (en) * 1984-05-07 1987-05-19 Nippondenso Co., Ltd. Heat wire type air flowrate measuring apparatus
US4671242A (en) * 1984-05-22 1987-06-09 Nippondenso Co., Ltd. Engine control apparatus
US4713765A (en) * 1984-02-24 1987-12-15 Nippondenso Co., Ltd. Control system for an engine having an air intake passage
US4730255A (en) * 1984-05-28 1988-03-08 Nippondenso Co., Ltd. Engine control apparatus
US4736302A (en) * 1984-06-13 1988-04-05 Nippondenso Co., Ltd. Control system for determining the quantity of intake air of an internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145442A (en) * 1983-12-29 1985-07-31 Fujitsu Ten Ltd Electronic control device for automobile
JPH0380980B2 (en) * 1983-12-29 1991-12-26 Fujitsu Ten Kk
US4713765A (en) * 1984-02-24 1987-12-15 Nippondenso Co., Ltd. Control system for an engine having an air intake passage
US4565091A (en) * 1984-04-20 1986-01-21 Nippondenso Co., Ltd. Apparatus for measuring the quantity of airflow passing through an intake passage of an engine
US4665745A (en) * 1984-05-07 1987-05-19 Nippondenso Co., Ltd. Heat wire type air flowrate measuring apparatus
US4671242A (en) * 1984-05-22 1987-06-09 Nippondenso Co., Ltd. Engine control apparatus
US4730255A (en) * 1984-05-28 1988-03-08 Nippondenso Co., Ltd. Engine control apparatus
US4736302A (en) * 1984-06-13 1988-04-05 Nippondenso Co., Ltd. Control system for determining the quantity of intake air of an internal combustion engine

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