KR950008193A - Diagnostic device of fuel evaporative gas deterrent - Google Patents

Diagnostic device of fuel evaporative gas deterrent Download PDF

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Publication number
KR950008193A
KR950008193A KR1019940023291A KR19940023291A KR950008193A KR 950008193 A KR950008193 A KR 950008193A KR 1019940023291 A KR1019940023291 A KR 1019940023291A KR 19940023291 A KR19940023291 A KR 19940023291A KR 950008193 A KR950008193 A KR 950008193A
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KR
South Korea
Prior art keywords
valve
canister
fuel
passage
closing
Prior art date
Application number
KR1019940023291A
Other languages
Korean (ko)
Other versions
KR970008660B1 (en
Inventor
슈이찌 요네야마
Original Assignee
쯔지 요시후미
니싼 지도샤 가부시끼 가이샤
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 쯔지 요시후미, 니싼 지도샤 가부시끼 가이샤 filed Critical 쯔지 요시후미
Publication of KR950008193A publication Critical patent/KR950008193A/en
Application granted granted Critical
Publication of KR970008660B1 publication Critical patent/KR970008660B1/en

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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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0809—Judging failure of purge control system
    • F02M25/0818—Judging failure of purge control system having means for pressurising the evaporative emission space

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

퍼어즈 라인에 막힘이 생겼는가 아닌가를 확실히 진단할 수 있는 연료 증발 가스 억지 장치의 진단 장치를 제공한다.Provided is a diagnostic device for fuel evaporative gas deterrent capable of reliably diagnosing whether or not a blockage occurs in the Purge line.

연료 증발 가스 억지 장치의 진단 장치에 있어서, 퍼어즈 라인의 이상을 진단하는 조건에 있는가 어떤가를 판정하는 수단(43)과, 이 진단 조건으로 되면 상기 퍼어즈 밸브(38)를 열어줌과 함께 드레인 컷트 밸브(39)를 닫는 압력 저하 제어 수단(41)과, 이 압력 저하 제어를 개시하여서부터 소정 시간을 경과한 후에 상기 압력 검출 수단(42)으로부터의 신호에 의거해서 퍼어즈 라인에 막힌데가 있는가 없는가를 진단하는 수단(42)을 설치한다.A diagnostic apparatus for a fuel evaporative gas inhibiting apparatus, comprising: means (43) for determining whether or not a condition of diagnosing an abnormality in a purge line, and opening the purge valve (38) when the diagnostic condition is reached, together with a drain cut Is there any blockage in the purge line based on the signal from the pressure detecting means 42 after the predetermined time has elapsed since the pressure reducing control means 41 closing the valve 39 and the pressure reducing control started? The means for diagnosing 42 is provided.

Description

연료 증발 가스 억지 장치의 진단 장치Diagnostic device of fuel evaporative gas deterrent

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 청구범위에 대응하는 도면.1 is a view corresponding to the claims of the present invention.

제2도는 제1실시예의 시스템도.2 is a system diagram of the first embodiment.

제3도는 이상 진단을 설명하기 위한 흐름도.3 is a flowchart for explaining an abnormal diagnosis.

제4도는 타이머 값 TM1에 대한 기준값 TM1′의 특성도.4 is a characteristic diagram of reference value TM1 'with respect to timer value TM1.

제5도는 퍼어즈(purge) 라인의 부압화에서 폐쇄후의 퍼어즈 라인 압력이 되돌아올 때까지를 도시하는 파형도.5 is a waveform diagram showing the negative pressure of the purge line until the purge line pressure after closing is returned.

Claims (1)

연료를 저류하는 연료 탱크와, 증발 연료를 흡착하는 캐니스터와, 상기 연료 탱크내에서 증발한 연료를 상기 캐니스터로 유도하는 통로와, 상기 캐니스터로부터 상기 연료 탱크로의 역류를 저지하는 체크 밸브와, 상기 캐니스터와 흡기 조리개 밸브의 하류의 흡기관을 연통하는 통로와, 이 통로를 개폐하는 퍼어즈 밸브와, 상기 캐니스터에 진기를 도입하는 통로를 개폐하는 드레인 컷트 밸브와, 퍼어즈 라인의 압력을 검출하는 수단과, 퍼어즈 라인의 이상을 진단하는 조건에 있는가 어떤가를 판정하는 수단과, 이 진단 조건으로 되면 상기 피어즈 밸브를 열어줌과함께 드레인 컷트 밸브를 닫는 압력 저하 제어 수단과, 이 압력 저하 제어를 개시해서 소정 시간을 경과한 후에 상기 압력 검출 수단으로부터의 신호에 의거해서 퍼어즈 라인에 막힘이 있는가 없는가를 진단하는 수단을 설치한 것을 특징으로 하는 연료 증발 가스 억지 장치의 진단 장치.A fuel tank for storing fuel, a canister for adsorbing evaporated fuel, a passage for guiding fuel evaporated in the fuel tank to the canister, a check valve for preventing backflow from the canister to the fuel tank, Detecting a pressure in the purge line; a passage communicating with the canister and an intake pipe downstream of the intake aperture valve; a purge valve for opening and closing the passage; a drain cut valve for opening and closing a passage for introducing dust into the canister; Means, and means for determining whether or not there is a condition for diagnosing abnormality of the fuse line, pressure drop control means for opening the piercing valve and closing the drain cut valve when the diagnosis condition is reached, and this pressure drop control. After the predetermined time has elapsed, the purge line is clogged based on a signal from the pressure detecting means. Are there any diagnostic system for diagnosing a fuel evaporation gas inhibiting device characterized in that a means for the. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940023291A 1993-09-16 1994-09-15 Diagnostic device for fuel evaporative emission preventive device KR970008660B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5230498A JPH0783124A (en) 1993-09-16 1993-09-16 Diagnostic device for fuel evaporative emission preventive device
JP93-230498 1993-09-16

Publications (2)

Publication Number Publication Date
KR950008193A true KR950008193A (en) 1995-04-17
KR970008660B1 KR970008660B1 (en) 1997-05-28

Family

ID=16908718

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940023291A KR970008660B1 (en) 1993-09-16 1994-09-15 Diagnostic device for fuel evaporative emission preventive device

Country Status (2)

Country Link
JP (1) JPH0783124A (en)
KR (1) KR970008660B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100756861B1 (en) * 2006-10-31 2007-09-07 지멘스 오토모티브 주식회사 Method for diagonsing full open stuck of canister purge valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6337806B2 (en) * 2015-03-10 2018-06-06 トヨタ自動車株式会社 Evaporative fuel processing equipment
JP6316347B2 (en) * 2016-07-13 2018-04-25 本田技研工業株式会社 Blockage detection apparatus and blockage detection method
KR20210062108A (en) * 2019-11-20 2021-05-31 현대자동차주식회사 Diagnostic method for engine purge system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100756861B1 (en) * 2006-10-31 2007-09-07 지멘스 오토모티브 주식회사 Method for diagonsing full open stuck of canister purge valve

Also Published As

Publication number Publication date
KR970008660B1 (en) 1997-05-28
JPH0783124A (en) 1995-03-28

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