JPS57191439A - Flow rate controlling device for recirculating exhaust gas - Google Patents

Flow rate controlling device for recirculating exhaust gas

Info

Publication number
JPS57191439A
JPS57191439A JP56074918A JP7491881A JPS57191439A JP S57191439 A JPS57191439 A JP S57191439A JP 56074918 A JP56074918 A JP 56074918A JP 7491881 A JP7491881 A JP 7491881A JP S57191439 A JPS57191439 A JP S57191439A
Authority
JP
Japan
Prior art keywords
negative pressure
valve
egr
exhaust gas
chamber
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
JP56074918A
Other languages
Japanese (ja)
Other versions
JPH0315023B2 (en
Inventor
Nobuo Habu
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 JP56074918A priority Critical patent/JPS57191439A/en
Publication of JPS57191439A publication Critical patent/JPS57191439A/en
Publication of JPH0315023B2 publication Critical patent/JPH0315023B2/ja
Granted 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

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 the operation efficiency of an engine and to reduce the quantity of NOx in the exhaust gas by a method wherein an auxiliary valve for opening a bleed port in a medium load zone is disposed in a vacuum pipe communicating with a negative pressure chamber within a negative pressure responsive EGR valve. CONSTITUTION:The EGR valve 1 arranged midway in an EGR passage for returning a part of the exhaust gas to an air intake system is controlled of its opening degree by the negative pressure of sucked air introduced into the negative pressure operating chamber 11 from an EGR port 3 which opens on the upstream side of a throttle valve 6 of a throttle body 2 through the vacuum pipe 4 and a negative pressure modulator 5. In this case, the auxiliary valve 20 is diposed midway in the vacuum pipe 4 between the EGR port 3 and the negative pressure modulator 5. The auxiliary valve 20 operates such as that in the medium load zone in the engine, the pressure in a second chamber 24 becomes substantially equal to the atmospheric pressure and the negative pressure of the sucked air is exerted on a first chamber 23 so that a valve body 21 is moved downward against the force of a spring 29 to thereby open the bleed port 30.
JP56074918A 1981-05-20 1981-05-20 Flow rate controlling device for recirculating exhaust gas Granted JPS57191439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56074918A JPS57191439A (en) 1981-05-20 1981-05-20 Flow rate controlling device for recirculating exhaust gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56074918A JPS57191439A (en) 1981-05-20 1981-05-20 Flow rate controlling device for recirculating exhaust gas

Publications (2)

Publication Number Publication Date
JPS57191439A true JPS57191439A (en) 1982-11-25
JPH0315023B2 JPH0315023B2 (en) 1991-02-28

Family

ID=13561236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56074918A Granted JPS57191439A (en) 1981-05-20 1981-05-20 Flow rate controlling device for recirculating exhaust gas

Country Status (1)

Country Link
JP (1) JPS57191439A (en)

Also Published As

Publication number Publication date
JPH0315023B2 (en) 1991-02-28

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