JPS55139939A - Air flow leading method - Google Patents

Air flow leading method

Info

Publication number
JPS55139939A
JPS55139939A JP4790279A JP4790279A JPS55139939A JP S55139939 A JPS55139939 A JP S55139939A JP 4790279 A JP4790279 A JP 4790279A JP 4790279 A JP4790279 A JP 4790279A JP S55139939 A JPS55139939 A JP S55139939A
Authority
JP
Japan
Prior art keywords
air flow
output voltage
lead
flow sensor
early
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
JP4790279A
Other languages
Japanese (ja)
Inventor
Matsuo Amano
Toru Sugawara
Takao Sasayama
Shinichi Sakamoto
Masayuki Miki
Takashige Ooyama
Yasunori Mori
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 JP4790279A priority Critical patent/JPS55139939A/en
Publication of JPS55139939A publication Critical patent/JPS55139939A/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

Abstract

PURPOSE:To compensate detective accuracy variable in a lapse of time, of an air flow sensor by computing two values of the air flow sensor, lead in the early running state of an engine and other state, thereby determining a real air intake amount. CONSTITUTION:When a program is started, an output voltage V of a hot wire used as an air flow sensor is read at a step 201. Determination of a software flag IST equal to one at a step 204 shows an output voltage V lead at a step 205, to be zero point output voltage V0. It is stored that an early time value C1 equals to V0<2>. Either a step 203 or 204 sequentially proceeds to a step 206, where an air flow rate Qa is computed from the previous early value V0 and an output voltage V lead at the step 205. In the drawing, C2 represents a profile coefficient of the hot wire and C1 represents a coefficient of lapse variation, which is excluded from the expression.
JP4790279A 1979-04-20 1979-04-20 Air flow leading method Pending JPS55139939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4790279A JPS55139939A (en) 1979-04-20 1979-04-20 Air flow leading method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4790279A JPS55139939A (en) 1979-04-20 1979-04-20 Air flow leading method

Publications (1)

Publication Number Publication Date
JPS55139939A true JPS55139939A (en) 1980-11-01

Family

ID=12788317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4790279A Pending JPS55139939A (en) 1979-04-20 1979-04-20 Air flow leading method

Country Status (1)

Country Link
JP (1) JPS55139939A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5925043A (en) * 1982-08-04 1984-02-08 Nissan Motor Co Ltd Air-fuel ratio control device in internal-combustion engine
US11092104B2 (en) 2016-02-24 2021-08-17 Vitesco Technologies GmbH Method for determining an air mass in an internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105639A (en) * 1977-02-25 1978-09-13 Hitachi Ltd Electronic advance angle system for internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105639A (en) * 1977-02-25 1978-09-13 Hitachi Ltd Electronic advance angle system for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5925043A (en) * 1982-08-04 1984-02-08 Nissan Motor Co Ltd Air-fuel ratio control device in internal-combustion engine
US11092104B2 (en) 2016-02-24 2021-08-17 Vitesco Technologies GmbH Method for determining an air mass in an internal combustion engine

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