KR950032983A - Functional diagnostic device of variable valve mechanism of internal combustion engine - Google Patents

Functional diagnostic device of variable valve mechanism of internal combustion engine Download PDF

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Publication number
KR950032983A
KR950032983A KR1019950004098A KR19950004098A KR950032983A KR 950032983 A KR950032983 A KR 950032983A KR 1019950004098 A KR1019950004098 A KR 1019950004098A KR 19950004098 A KR19950004098 A KR 19950004098A KR 950032983 A KR950032983 A KR 950032983A
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KR
South Korea
Prior art keywords
closing time
valve closing
intake
seating sound
exhaust valves
Prior art date
Application number
KR1019950004098A
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Korean (ko)
Other versions
KR100264908B1 (en
Inventor
와따나베 사또루
Original Assignee
야스모로 도시오
유니시아 젝스 코포레이션
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Publication date
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Publication of KR950032983A publication Critical patent/KR950032983A/en
Application granted granted Critical
Publication of KR100264908B1 publication Critical patent/KR100264908B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/025—Engine noise, e.g. determined by using an acoustic sensor
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

가변밸브가구의 기능을 보다 정확하게 진단한다.Diagnose the function of variable valve furniture more accurately.

제어유니트(102)에 갖추어진 밸브 폐쇄 타이밍 검출부(202)로부터 펄스 A,B가 추출되었을 때 진동센서(105)의 검출신호에 의거해 주파수 검출부(201)에서 흡, 배기밸브의 착석음의 주파수분석을 행하고(단계2), 두개의 주파수성분의 강도를 비교하고(단계11), 고속캠, 저속캠 제어중인가의 여부를 판정해서 (단계12,15)기능진단을 행한다(단계13,14)When pulses A and B are extracted from the valve closing timing detection unit 202 provided in the control unit 102, the frequency of the seating sound of the intake and exhaust valves in the frequency detection unit 201 based on the detection signal of the vibration sensor 105. The analysis is performed (step 2), the strengths of the two frequency components are compared (step 11), and it is determined whether the high speed cam or the low speed cam is under control (steps 12 and 15) to perform a functional diagnosis (steps 13 and 14). )

Description

내연기관의 가변밸브기구의 기능진단장치Functional diagnostic device of variable valve mechanism of internal combustion engine

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 구성을 도시한 블록도, 제2도는 본 발명의 일실시예를 도시한 시스템 블록도, 제7도는 제1실시예의 기능진단처리를 도시한 흐름도, 제10도는 제2실시예의 기능진단처리를 도시한 흐름도.1 is a block diagram showing the configuration of the present invention, FIG. 2 is a system block diagram showing one embodiment of the present invention, FIG. 7 is a flowchart showing the functional diagnostic processing of the first embodiment, and FIG. 10 is a second embodiment. Flow chart showing an example functional diagnostic process.

Claims (4)

흡, 배기밸브의 개폐 타이밍을 기관운전조건에 따라 절환하는 가변 밸브기능을 갖춘 내연기관에 있어서, 상기 흡, 배기밸브의 폐쇄시기를 검출하는 밸브 폐쇄시기 검출수단과, 기관진동을 검출하는 기관진동 검출수단과, 상기 밸브 폐쇄시기 검출수단에 의해 검출된 흡, 배기밸브의 밸브 폐쇄시기 근방에서 기관진동 검출수단에 의해 검출된 기관진동으로부터 흡, 배기밸브의 착석음 주파수성분을 추출하는 착석음 추출수단과, 그 착석음 추출수단에 의해 추출된 흡, 배기밸브의 착석음 주파수성분의 강도에 의거해 가변밸브기구의 작동상태를 진단하는 작동상태 진단수단을 구비해 구성된 것을 특징으로 하는 내연기관의 가변밸브기구의 기능진단장치.An internal combustion engine having a variable valve function for switching the opening and closing timing of intake and exhaust valves in accordance with engine operation conditions, comprising: valve closing time detection means for detecting the closing time of the intake and exhaust valves, and engine vibration for detecting engine vibration A seating sound extraction for extracting the seating sound frequency components of the intake and exhaust valves from the engine vibration detected by the engine vibration detection means near the valve closing time of the intake and exhaust valves detected by the detection means and the valve closing time detection means. Means and an operating state diagnosis means for diagnosing the operating state of the variable valve mechanism based on the strength of the seating sound frequency components of the intake and exhaust valves extracted by the seating sound extraction means. Functional diagnosis device of variable valve mechanism. 제1항에 있어서, 상기 가변밸브기구는 저속형 캠과 고속용 캠을 절환함으로써, 흡, 배기밸브의 밸브폐쇄타이밍을 절환하는 것을 특징으로 하는 내연기관의 가변밸브기구의 기능진단장치.The functional diagnostic device of a variable valve mechanism of an internal combustion engine according to claim 1, wherein the variable valve mechanism switches a valve closing timing of the intake and exhaust valves by switching the low speed cam and the high speed cam. 제1항 또는 제2항에 있어서, 착석음 주파수 추출수단은 가변밸브기구로 절환되어지는 흡, 배기밸브의 밸브폐쇄시기 근방에 있어서, 각각 착석음 주파수를 추출하고, 작동상태 진단수단은 이들 두가지 밸브 폐쇄시기 근방에서 추출된 착석음 주파수성분의 강도를 비교해서 그 강도가 큰 쪽의 밸브 폐쇄시기를 실제 밸브 폐쇄시기로 진단하는 것을 특징으로 하는 내연기관의 가변밸브기구의 기능진단장치.The seating sound frequency extracting means extracts the seating sound frequency in the vicinity of the valve closing time of the intake and exhaust valves, which are switched to the variable valve mechanism. A function diagnosing device for a variable valve mechanism of an internal combustion engine, characterized by comparing the strength of a seating sound frequency component extracted near a valve closing time, and diagnosing the valve closing time with the greater intensity as the actual valve closing time. 제1항 또는 제2항에 있어서, 착석음 주파수 추출수단은 흡, 배기밸브의 저속캠 또는 고속캠 제어중의밸브 폐쇄시기 근방에서 착석음 주파수를 추출하고, 작동상태 진단수단은 제어중의 흡, 배기밸브의 밸브 폐쇄시기 근방에서 추출된 착석음 주파수성분의 강도를 소정 레벨과 비교하고, 착석음 주파수성분의 강도가 소정 레벨보다도 클 때에 제어중의 밸브 폐쇄시기를 실제 밸브 폐쇄시기로서 진단을 하는 것을 특징으로 하는 내연기관의 가변밸브기구의 기능진단장치.The seating sound frequency extracting means extracts the seating sound frequency in the vicinity of a valve closing time during low speed cam or high speed cam control of the intake and exhaust valves. The strength of the seating sound frequency component extracted near the valve closing time of the exhaust valve is compared with a predetermined level, and when the strength of the seating sound frequency component is larger than the predetermined level, the valve closing time under control is diagnosed as the actual valve closing time. Functional diagnostic apparatus of a variable valve mechanism of an internal combustion engine. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950004098A 1994-02-28 1995-02-28 Disgonastic apparatus for variable valve mechanism of internal combustion engine KR100264908B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6029847A JP2943042B2 (en) 1994-02-28 1994-02-28 Function diagnosis device for variable valve mechanism of internal combustion engine
JP29847/1994 1994-02-28

Publications (2)

Publication Number Publication Date
KR950032983A true KR950032983A (en) 1995-12-22
KR100264908B1 KR100264908B1 (en) 2000-10-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19957157A1 (en) * 1999-11-27 2001-06-07 Porsche Ag Valve controller for internal combustion engine detects camshaft measurement values to check function of one or more switching elements, displays function signal if defined deviation
DE10157514A1 (en) 2001-11-23 2003-06-05 Bayerische Motoren Werke Ag Method and system for detecting valve clearance and the position of the valve opening cams
JP3966500B2 (en) * 2002-01-29 2007-08-29 ダイハツ工業株式会社 Defect inspection system due to abnormal noise
JP4220516B2 (en) 2005-12-29 2009-02-04 本田技研工業株式会社 Failure detection device for variable valve mechanism of internal combustion engine
DE102018204450B4 (en) * 2018-03-22 2021-12-23 Vitesco Technologies GmbH Method for testing a variable valve lift control of an internal combustion engine
KR20210152287A (en) * 2020-06-08 2021-12-15 현대자동차주식회사 Method for Injector Abnormal Cylinder Diagnosis Based On Signal Deviation and Injector Abnormal Diagnosis System Thereof

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JP2943042B2 (en) 1999-08-30
KR100264908B1 (en) 2000-10-02
JPH07238822A (en) 1995-09-12

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