JPS57191440A - Exhaust gas recirculation control device for vehicular diesel engine - Google Patents

Exhaust gas recirculation control device for vehicular diesel engine

Info

Publication number
JPS57191440A
JPS57191440A JP56076334A JP7633481A JPS57191440A JP S57191440 A JPS57191440 A JP S57191440A JP 56076334 A JP56076334 A JP 56076334A JP 7633481 A JP7633481 A JP 7633481A JP S57191440 A JPS57191440 A JP S57191440A
Authority
JP
Japan
Prior art keywords
engine
negative pressure
exhaust gas
egr
port
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
JP56076334A
Other languages
Japanese (ja)
Inventor
Takao Suzuki
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
Toyota Jidosha Kogyo KK
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, Toyota Jidosha Kogyo KK filed Critical Toyota Motor Corp
Priority to JP56076334A priority Critical patent/JPS57191440A/en
Publication of JPS57191440A publication Critical patent/JPS57191440A/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
    • 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
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

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

Abstract

PURPOSE:To improve specifically the idle operation characteristic of a Diesel engine by a method wherein the recirculation of the exhaust gas (EGR) of the Diesel engine is performed at a flow rate proportional to an engine load except when the engine is in idler or no load operation and the EGR is stopped when the engine is in idler or no load operation. CONSTITUTION:When the engine is in no load operation, a negative pressure control valve 37 gives to a port 43 a negative pressure corresponding to the angle of rotation of an accelerator link 56. When, at this time, a neural stage sensor 63 has not yet detected a neutral stage, a solenoid of a negative pressure changeover valve 59 is energized so that conduits 58 and 60 are made to communicate with each other and the negative pressure in the port 43 is introduced into an EGR cotrol valve 20. Consequently, a valve element 18 opens an inlet port 13 and a part of the exhaust gas is returned to an air intake passage 6. On the other hand, when the neutral stage sensor 63 has already detected the neutral stage, that is, when the engine is in idle operation, the negative pressure changeover valve 59 is deenergized and the conduit 60 is connected to an atmospheric pressure port 61 with the result that the EGR control valve 20 is closed and the return flow of the exhaust gas is stopped.
JP56076334A 1981-05-19 1981-05-19 Exhaust gas recirculation control device for vehicular diesel engine Pending JPS57191440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56076334A JPS57191440A (en) 1981-05-19 1981-05-19 Exhaust gas recirculation control device for vehicular diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56076334A JPS57191440A (en) 1981-05-19 1981-05-19 Exhaust gas recirculation control device for vehicular diesel engine

Publications (1)

Publication Number Publication Date
JPS57191440A true JPS57191440A (en) 1982-11-25

Family

ID=13602455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56076334A Pending JPS57191440A (en) 1981-05-19 1981-05-19 Exhaust gas recirculation control device for vehicular diesel engine

Country Status (1)

Country Link
JP (1) JPS57191440A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602606A (en) * 1983-09-19 1986-07-29 Toyota Jidosha Kabushiki Kaisha Diesel engine exhaust gas recirculation system with greater atmospheric pressure compensation at low engine load
JPS6254264U (en) * 1985-09-24 1987-04-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602606A (en) * 1983-09-19 1986-07-29 Toyota Jidosha Kabushiki Kaisha Diesel engine exhaust gas recirculation system with greater atmospheric pressure compensation at low engine load
JPS6254264U (en) * 1985-09-24 1987-04-03

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