JPS64344A - Operation diagnosis device for exhaust gas recirculation device - Google Patents

Operation diagnosis device for exhaust gas recirculation device

Info

Publication number
JPS64344A
JPS64344A JP62153059A JP15305987A JPS64344A JP S64344 A JPS64344 A JP S64344A JP 62153059 A JP62153059 A JP 62153059A JP 15305987 A JP15305987 A JP 15305987A JP S64344 A JPS64344 A JP S64344A
Authority
JP
Japan
Prior art keywords
sensor
temperature
temperature sensor
inputted
delay time
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
JP62153059A
Other languages
Japanese (ja)
Other versions
JPH01344A (en
Inventor
Masanori Sakamoto
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.)
Subaru Corp
Original Assignee
Fuji Heavy Industries 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 Fuji Heavy Industries Ltd filed Critical Fuji Heavy Industries Ltd
Priority to JP62153059A priority Critical patent/JPS64344A/en
Publication of JPH01344A publication Critical patent/JPH01344A/en
Publication of JPS64344A publication Critical patent/JPS64344A/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
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • 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
    • F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system

Landscapes

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

Abstract

PURPOSE:To enable accurate fault diagnosis by setting a specified delay time after the operational condition for exhaust gas recirculation has been set, and memorying the maximum value detected by a temperature sensor during the period of said delay time so as to compare said maximum value with the set value for making fault dignosis. CONSTITUTION:A temperature sensor 10 is installed on the midway of an exhaust circulation passage 6 for an EGR device communicating the way between an intake and an exhaust manifold 3 and 4, and the detected signal thereof is inputted into a control unit 15 together with detected singals from a throttle opening sensor 11, an engine revolving speed sensor 12, a water temperature sensor 13 and a solenoid valve operating sensor 14. And when it is judged at an EGR condition establishment judging section 16 that the EGR condition has been established, the detected signal from the temperature sensor 10 is inputted into a temperature detecting section 17 so as to memorize the maximum value during the period of the time set by a delay time setting section 18. Then, the aforesaid maximum temperature is inputted into a fault judging section 19, the judgement is formed that failures occur when the maxi mum temperature is less than the set value, thereby allowing a check lamp 20 to be lighted.
JP62153059A 1987-06-19 1987-06-19 Operation diagnosis device for exhaust gas recirculation device Pending JPS64344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62153059A JPS64344A (en) 1987-06-19 1987-06-19 Operation diagnosis device for exhaust gas recirculation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62153059A JPS64344A (en) 1987-06-19 1987-06-19 Operation diagnosis device for exhaust gas recirculation device

Publications (2)

Publication Number Publication Date
JPH01344A JPH01344A (en) 1989-01-05
JPS64344A true JPS64344A (en) 1989-01-05

Family

ID=15554081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62153059A Pending JPS64344A (en) 1987-06-19 1987-06-19 Operation diagnosis device for exhaust gas recirculation device

Country Status (1)

Country Link
JP (1) JPS64344A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6435065A (en) * 1987-07-29 1989-02-06 Toyota Motor Corp Diagnosis device for exhaust gas recirculator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6435065A (en) * 1987-07-29 1989-02-06 Toyota Motor Corp Diagnosis device for exhaust gas recirculator

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