JPS5614847A - Control system for internal combustion engine - Google Patents

Control system for internal combustion engine

Info

Publication number
JPS5614847A
JPS5614847A JP8823679A JP8823679A JPS5614847A JP S5614847 A JPS5614847 A JP S5614847A JP 8823679 A JP8823679 A JP 8823679A JP 8823679 A JP8823679 A JP 8823679A JP S5614847 A JPS5614847 A JP S5614847A
Authority
JP
Japan
Prior art keywords
amount
load
exhaust
air
nox
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
JP8823679A
Other languages
Japanese (ja)
Inventor
Takashige Ooyama
Hiroshi Kuroiwa
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 JP8823679A priority Critical patent/JPS5614847A/en
Publication of JPS5614847A publication Critical patent/JPS5614847A/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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

PURPOSE:To reduce the number of component parts and to accomplish optimal control on recirculation of exhaust gas, by storing information concerning the amount of NOx discharged per unit horsepower of engine in relation to the load, and controlling an exhaust-gas recirculation controlling means on the basis of the above information. CONSTITUTION:In order to keep the amount of NOx contained in the exhaust gas over a wide load range, it is necessary to keep the ratio of the amount Ge of recirculated exhaust gas including residual gas to the amount Ga of air constant as shown in the drawing. For this purpose, movement of accelerator pedal 26 is detected by positional sensor 27 and information of the load requirement is put into microcomputor 28. The microcomputor 28 calculates required values of Ga and Ge from the graph shown in the drawing and controls throttle valve 31 and exhaust- gas recirculation valve 31 by means of actuators 29, 30 such that said required values of Ga and Ge can be obtained. Thus, the amount of NOx to the load can be reduced correctly. Further, since the required amount of air to a given load is varied with the air-fuel ratio of mixture, control must be made also in consideration of this fact.
JP8823679A 1979-07-13 1979-07-13 Control system for internal combustion engine Pending JPS5614847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8823679A JPS5614847A (en) 1979-07-13 1979-07-13 Control system for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8823679A JPS5614847A (en) 1979-07-13 1979-07-13 Control system for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS5614847A true JPS5614847A (en) 1981-02-13

Family

ID=13937218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8823679A Pending JPS5614847A (en) 1979-07-13 1979-07-13 Control system for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS5614847A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110329A (en) * 1976-03-12 1977-09-16 Toyota Motor Corp Exhaust gas recirculation control for internal-combustion engine
JPS5459520A (en) * 1977-10-21 1979-05-14 Hitachi Ltd Exhaust gas recirculation controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110329A (en) * 1976-03-12 1977-09-16 Toyota Motor Corp Exhaust gas recirculation control for internal-combustion engine
JPS5459520A (en) * 1977-10-21 1979-05-14 Hitachi Ltd Exhaust gas recirculation controller

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