JPS5946352A - Method of reducing engine roughness by way of air-fuel ratio control - Google Patents

Method of reducing engine roughness by way of air-fuel ratio control

Info

Publication number
JPS5946352A
JPS5946352A JP15827982A JP15827982A JPS5946352A JP S5946352 A JPS5946352 A JP S5946352A JP 15827982 A JP15827982 A JP 15827982A JP 15827982 A JP15827982 A JP 15827982A JP S5946352 A JPS5946352 A JP S5946352A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
air
engine
mean effective
indicated mean
fuel ratio
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
JP15827982A
Inventor
Tsuneji Ito
Toshiaki Motoi
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

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/14Introducing closed-loop corrections
    • F02D41/1497With detection of the mechanical response of the engine
    • F02D41/1498With detection of the mechanical response of the engine measuring engine roughness
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/02Input parameters for engine control the parameters being related to the engine
    • F02D2200/10Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015Engines misfires

Abstract

PURPOSE:To improve the driving performance of an engine and to keep the specific fuel consumption of the engine low, by preventing occurrence of engine roughness with high accuracy by detecting variation of the indicated mean effective pressure of each cylinder during one cycle of engine operation and deviation of the indicated mean effective pressures of a plurality of cylinders, and controlling the air-fuel ratio of each cylinder on the basis of the above two factors. CONSTITUTION:Output signal of a crank signal sensor 3 and combustion pressure signals of each cylinder produced by respective combustion pressure sensors 4 are furnished to a Pi-meter 9, which calculates the indicated mean effective pressure Pi of each cylinder from these signals. These signals are also furnished to a control circuit 10 together with the crank signal. Further, a signal relating to the flow rate of intake air is furnished from an air-flow meter 7 to the control circuit 10. In the control circuit 10, the engine speed N is calculated from the crank signal and an air-fuel ratio necessary for the actual operational conditions of an engine is determined from the indicated mean effective pressure calculated by the Pi-meter 9, the flow rate Q of intake air detected by the air-flow meter 7, etc. Further, in controlling the air-fuel ratio, engine roughness is judged to be within a tolerable range if variation of the indicated mean effective pressure Pi during one cycle of engine operation is smaller than a prescribed tolerable value or deviation of the indicated mean effective pressure of the cylinders is lower than a prescribed tolerable value.
JP15827982A 1982-09-10 1982-09-10 Method of reducing engine roughness by way of air-fuel ratio control Pending JPS5946352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15827982A JPS5946352A (en) 1982-09-10 1982-09-10 Method of reducing engine roughness by way of air-fuel ratio control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15827982A JPS5946352A (en) 1982-09-10 1982-09-10 Method of reducing engine roughness by way of air-fuel ratio control

Publications (1)

Publication Number Publication Date
JPS5946352A true true JPS5946352A (en) 1984-03-15

Family

ID=15668125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15827982A Pending JPS5946352A (en) 1982-09-10 1982-09-10 Method of reducing engine roughness by way of air-fuel ratio control

Country Status (1)

Country Link
JP (1) JPS5946352A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61171851A (en) * 1985-01-24 1986-08-02 Mazda Motor Corp Control device for multicylinder engine
JPS6240245U (en) * 1985-08-30 1987-03-10
JPS6368734A (en) * 1986-09-09 1988-03-28 Nissan Motor Co Ltd Fuel feeding control device for internal combustion engine
US4736724A (en) * 1986-12-01 1988-04-12 Ford Motor Company Adaptive lean limit air fuel control using combustion pressure sensor feedback
JPS63176644A (en) * 1987-01-19 1988-07-20 Toyota Motor Corp Air-fuel ratio controller for internal combustion engine
JPS6435081A (en) * 1987-07-30 1989-02-06 Hitachi Ltd Engine controller
US4825833A (en) * 1986-05-10 1989-05-02 Hitachi, Ltd. Engine control apparatus
EP0448603A1 (en) * 1988-12-19 1991-10-02 Motorola Inc System for monitoring and controlling engine performance.
US5069185A (en) * 1990-06-15 1991-12-03 Edward J. Evasick Diesel tune-up method
JPH05312081A (en) * 1991-07-25 1993-11-22 Ngk Spark Plug Co Ltd Combustion controller of gasoline engine
JPH06221217A (en) * 1993-01-28 1994-08-09 Unisia Jecs Corp Surge torque detection device for internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147327A (en) * 1978-05-08 1979-11-17 Bendix Corp Internal combustion engine controller
JPS5746033A (en) * 1980-09-05 1982-03-16 Toyota Motor Corp Method of injecting fuel under electronic control
JPS5746034A (en) * 1980-09-05 1982-03-16 Hitachi Ltd Combustion controller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147327A (en) * 1978-05-08 1979-11-17 Bendix Corp Internal combustion engine controller
JPS5746033A (en) * 1980-09-05 1982-03-16 Toyota Motor Corp Method of injecting fuel under electronic control
JPS5746034A (en) * 1980-09-05 1982-03-16 Hitachi Ltd Combustion controller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61171851A (en) * 1985-01-24 1986-08-02 Mazda Motor Corp Control device for multicylinder engine
JPS6240245U (en) * 1985-08-30 1987-03-10
US4825833A (en) * 1986-05-10 1989-05-02 Hitachi, Ltd. Engine control apparatus
JPS6368734A (en) * 1986-09-09 1988-03-28 Nissan Motor Co Ltd Fuel feeding control device for internal combustion engine
US4736724A (en) * 1986-12-01 1988-04-12 Ford Motor Company Adaptive lean limit air fuel control using combustion pressure sensor feedback
JPS63176644A (en) * 1987-01-19 1988-07-20 Toyota Motor Corp Air-fuel ratio controller for internal combustion engine
JPS6435081A (en) * 1987-07-30 1989-02-06 Hitachi Ltd Engine controller
EP0448603A1 (en) * 1988-12-19 1991-10-02 Motorola Inc System for monitoring and controlling engine performance.
US5069185A (en) * 1990-06-15 1991-12-03 Edward J. Evasick Diesel tune-up method
JPH05312081A (en) * 1991-07-25 1993-11-22 Ngk Spark Plug Co Ltd Combustion controller of gasoline engine
JPH06221217A (en) * 1993-01-28 1994-08-09 Unisia Jecs Corp Surge torque detection device for internal combustion engine

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