JPS5675936A - Air fuel ratio controlling method in internal combustion engine - Google Patents

Air fuel ratio controlling method in internal combustion engine

Info

Publication number
JPS5675936A
JPS5675936A JP15237179A JP15237179A JPS5675936A JP S5675936 A JPS5675936 A JP S5675936A JP 15237179 A JP15237179 A JP 15237179A JP 15237179 A JP15237179 A JP 15237179A JP S5675936 A JPS5675936 A JP S5675936A
Authority
JP
Japan
Prior art keywords
rotational speed
engine
fuel ratio
feedback control
air fuel
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.)
Granted
Application number
JP15237179A
Other languages
Japanese (ja)
Other versions
JPS6217657B2 (en
Inventor
Toshio Suematsu
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP15237179A priority Critical patent/JPS5675936A/en
Publication of JPS5675936A publication Critical patent/JPS5675936A/en
Publication of JPS6217657B2 publication Critical patent/JPS6217657B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To prevent feedback control from being unintentional open loop control by changing monitor comparing level when an engine is in the high rotational speed or high load running condition.
CONSTITUTION: On step 60 is decided whether or not data N representing actual rotational speed of an engine exceeds a predetermined value. When the engine is not in the high rotational speed, on step 61 is whether or not data of time T in which the output signal level of A/F sensor is over monitor comparing level is larger than a predetermined value D. In the case of T<D, the A/F sensor is assumed in activated condition to carry out feedback control of air fuel ratio. In the highest rotational speed of the engine, the program advances to step 66 to controllably raise the monitor comparing level. Consequently, unintentional function for stopping the feedback control is avoided.
COPYRIGHT: (C)1981,JPO&Japio
JP15237179A 1979-11-27 1979-11-27 Air fuel ratio controlling method in internal combustion engine Granted JPS5675936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15237179A JPS5675936A (en) 1979-11-27 1979-11-27 Air fuel ratio controlling method in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15237179A JPS5675936A (en) 1979-11-27 1979-11-27 Air fuel ratio controlling method in internal combustion engine

Publications (2)

Publication Number Publication Date
JPS5675936A true JPS5675936A (en) 1981-06-23
JPS6217657B2 JPS6217657B2 (en) 1987-04-18

Family

ID=15539059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15237179A Granted JPS5675936A (en) 1979-11-27 1979-11-27 Air fuel ratio controlling method in internal combustion engine

Country Status (1)

Country Link
JP (1) JPS5675936A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827849A (en) * 1981-08-13 1983-02-18 Toyota Motor Corp Air-fuel ratio controlling method for internal combustion engine
JPS5870036A (en) * 1981-10-23 1983-04-26 Toyota Motor Corp Apparatus for controlling air-fuel ratio of internal-combustion engine
JPS6193249A (en) * 1984-10-11 1986-05-12 Fujitsu Ten Ltd Control unit for internal-combustion engine
EP0292973A2 (en) * 1987-05-28 1988-11-30 Japan Electronic Control Systems Co., Ltd. Air/fuel mixture ratio control system for internal combustion engine with feature of learning correction coefficient including altitude dependent factor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827849A (en) * 1981-08-13 1983-02-18 Toyota Motor Corp Air-fuel ratio controlling method for internal combustion engine
JPS5870036A (en) * 1981-10-23 1983-04-26 Toyota Motor Corp Apparatus for controlling air-fuel ratio of internal-combustion engine
JPS6193249A (en) * 1984-10-11 1986-05-12 Fujitsu Ten Ltd Control unit for internal-combustion engine
JPH0328576B2 (en) * 1984-10-11 1991-04-19 Fujitsu Ten Ltd
EP0292973A2 (en) * 1987-05-28 1988-11-30 Japan Electronic Control Systems Co., Ltd. Air/fuel mixture ratio control system for internal combustion engine with feature of learning correction coefficient including altitude dependent factor

Also Published As

Publication number Publication date
JPS6217657B2 (en) 1987-04-18

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