JPS6487842A - Air-fuel ratio control device for internal combustion engine - Google Patents

Air-fuel ratio control device for internal combustion engine

Info

Publication number
JPS6487842A
JPS6487842A JP62246563A JP24656387A JPS6487842A JP S6487842 A JPS6487842 A JP S6487842A JP 62246563 A JP62246563 A JP 62246563A JP 24656387 A JP24656387 A JP 24656387A JP S6487842 A JPS6487842 A JP S6487842A
Authority
JP
Japan
Prior art keywords
air
fuel ratio
exhaust gas
internal pressure
cylinder internal
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
JP62246563A
Other languages
Japanese (ja)
Inventor
Satoru Okubo
Shoichi Washino
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62246563A priority Critical patent/JPS6487842A/en
Priority to KR1019880011764A priority patent/KR940002956B1/en
Priority to US07/250,244 priority patent/US4903665A/en
Priority to DE3833122A priority patent/DE3833122A1/en
Publication of JPS6487842A publication Critical patent/JPS6487842A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To improve the accuracy in controlling an air-fuel ratio by correcting the basic quantity of fuel injection operated based on both an amount of suction air and revolutions by use of both cylinder internal pressure within one ignition cycle measured based on the crank angle and cylinder internal pressure, and exhaust gas temperature. CONSTITUTION:Detected values from an air flow meter 2, a water temperature sensor 6, a crank angle sensor 7, an exhaust gas sensor 9, a pressure sensor 13 detecting cylinder internal pressure, an exhaust gas temperature sensor 16 and the like are inputted into a control unit 12 so as to perform an operational control for the valve opening time of a fuel injection valve 10. The control unit 12 measures the maximum value per cycle based on the crank angle and cylinder internal pressure so as to estimate an actual air-fuel ratio on the basis of the average value thereof and exhaust gas temperature for making correction in such a way that the estimated one shall be a target air-fuel ratio set based on both revolutions and an amount of suction air.
JP62246563A 1987-09-29 1987-09-29 Air-fuel ratio control device for internal combustion engine Pending JPS6487842A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62246563A JPS6487842A (en) 1987-09-29 1987-09-29 Air-fuel ratio control device for internal combustion engine
KR1019880011764A KR940002956B1 (en) 1987-09-29 1988-09-12 Air-fuel ratio controlling apparatus for internal combustion engine
US07/250,244 US4903665A (en) 1987-09-29 1988-09-28 Air-fuel ratio control apparatus for an internal combustion engine
DE3833122A DE3833122A1 (en) 1987-09-29 1988-09-29 DEVICE FOR MONITORING THE AIR / FUEL RATIO IN AN INTERNAL COMBUSTION ENGINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62246563A JPS6487842A (en) 1987-09-29 1987-09-29 Air-fuel ratio control device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS6487842A true JPS6487842A (en) 1989-03-31

Family

ID=17150274

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62246563A Pending JPS6487842A (en) 1987-09-29 1987-09-29 Air-fuel ratio control device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS6487842A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008139091A2 (en) 2007-04-19 2008-11-20 Renault S.A.S. Internal combustion engine with adjustment of the injected fuel amount, and method for establishing an injected fuel set point value
JP2011153556A (en) * 2010-01-27 2011-08-11 Toyota Motor Corp Air-fuel ratio estimation system
US20110257871A1 (en) * 2010-04-16 2011-10-20 Nikki Co., Ltd. Air fuel ratio control device of engine
JP2012180817A (en) * 2011-03-03 2012-09-20 Toyota Motor Corp Device for calculating air-fuel ratio of internal combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008139091A2 (en) 2007-04-19 2008-11-20 Renault S.A.S. Internal combustion engine with adjustment of the injected fuel amount, and method for establishing an injected fuel set point value
JP2011153556A (en) * 2010-01-27 2011-08-11 Toyota Motor Corp Air-fuel ratio estimation system
US20110257871A1 (en) * 2010-04-16 2011-10-20 Nikki Co., Ltd. Air fuel ratio control device of engine
US8543316B2 (en) * 2010-04-16 2013-09-24 Nikki Co., Ltd. Air fuel ratio control device of engine
JP2012180817A (en) * 2011-03-03 2012-09-20 Toyota Motor Corp Device for calculating air-fuel ratio of internal combustion engine

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