JPH0430459U - - Google Patents

Info

Publication number
JPH0430459U
JPH0430459U JP7150390U JP7150390U JPH0430459U JP H0430459 U JPH0430459 U JP H0430459U JP 7150390 U JP7150390 U JP 7150390U JP 7150390 U JP7150390 U JP 7150390U JP H0430459 U JPH0430459 U JP H0430459U
Authority
JP
Japan
Prior art keywords
oil pressure
exhaust valve
crank angle
cylinder
converts
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
JP7150390U
Other languages
Japanese (ja)
Other versions
JPH0749403Y2 (en
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 filed Critical
Priority to JP7150390U priority Critical patent/JPH0749403Y2/en
Publication of JPH0430459U publication Critical patent/JPH0430459U/ja
Application granted granted Critical
Publication of JPH0749403Y2 publication Critical patent/JPH0749403Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Testing Of Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１〜第３図は本考案に係るもので第１図は第
１実施例の全体構成図、第２図は駆動油圧と開閉
弁タイミングの関係図、第３図は実施例のフロー
チヤート、第４図は従来形排気弁の故障診断装置
で描かれた指圧線図である。 １……機関本体、４ａ〜４ｅ……油圧センサ、
５……Ｔ，Ｄ，Ｃセンサ、６……圧力変換器、７
……パルス変換器、８……変換器、９……演算器
、１０……データ比較器。 1 to 3 are related to the present invention, and FIG. 1 is an overall configuration diagram of the first embodiment, FIG. 2 is a diagram showing the relationship between driving oil pressure and opening/closing valve timing, and FIG. 3 is a flowchart of the embodiment. FIG. 4 is an acupressure diagram drawn by a conventional exhaust valve failure diagnosis device. 1... Engine body, 4a to 4e... Oil pressure sensor,
5...T, D, C sensor, 6...Pressure transducer, 7
... Pulse converter, 8 ... Converter, 9 ... Arithmetic unit, 10 ... Data comparator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 各排気弁駆動用油圧シリンダの駆動油圧を計測
する油圧センサと、クランク角の基準位置を検出
するクランク角センサと、排気弁駆動油圧曲線の
特定仕切油圧Ｐｖとなる点の排気弁開閉タイミン
グをバルス信号に変換するパルス変換器と、クラ
ンク角センサの出力をパルス信号に変換するパル
ス変換器と、前記両変換器よりのパルスを基とし
て開閉タイミングを算出する演算器と、各シリン
ダ毎に計測算出された開閉タイミングを各シリン
ダ間及び基準データと比較する比較器とを有して
なる油圧駆動式排気弁の故障診断装置。 An oil pressure sensor that measures the drive oil pressure of each exhaust valve drive hydraulic cylinder, a crank angle sensor that detects the reference position of the crank angle, and a valve that controls the opening and closing timing of the exhaust valve at a point where the specific partition oil pressure Pv of the exhaust valve drive oil pressure curve is reached. A pulse converter that converts into a signal, a pulse converter that converts the output of the crank angle sensor into a pulse signal, a calculator that calculates the opening/closing timing based on the pulses from both converters, and a measurement calculation for each cylinder. A failure diagnosis device for a hydraulically driven exhaust valve, comprising a comparator that compares the opened/closed timing between each cylinder and with reference data.
JP7150390U 1990-07-06 1990-07-06 Fault diagnosis system for hydraulically driven exhaust valves Expired - Lifetime JPH0749403Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7150390U JPH0749403Y2 (en) 1990-07-06 1990-07-06 Fault diagnosis system for hydraulically driven exhaust valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7150390U JPH0749403Y2 (en) 1990-07-06 1990-07-06 Fault diagnosis system for hydraulically driven exhaust valves

Publications (2)

Publication Number Publication Date
JPH0430459U true JPH0430459U (en) 1992-03-11
JPH0749403Y2 JPH0749403Y2 (en) 1995-11-13

Family

ID=31608592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7150390U Expired - Lifetime JPH0749403Y2 (en) 1990-07-06 1990-07-06 Fault diagnosis system for hydraulically driven exhaust valves

Country Status (1)

Country Link
JP (1) JPH0749403Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009068489A (en) * 2007-09-11 2009-04-02 Robert Bosch Gmbh Electrohydraulic valve control operating method for internal combustion engine and electrohydraulic valve control system for internal combustion engine
JP2013072303A (en) * 2011-09-27 2013-04-22 Hino Motors Ltd Fault diagnostic device for hydraulic variable valve apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009068489A (en) * 2007-09-11 2009-04-02 Robert Bosch Gmbh Electrohydraulic valve control operating method for internal combustion engine and electrohydraulic valve control system for internal combustion engine
JP2013072303A (en) * 2011-09-27 2013-04-22 Hino Motors Ltd Fault diagnostic device for hydraulic variable valve apparatus

Also Published As

Publication number Publication date
JPH0749403Y2 (en) 1995-11-13

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Legal Events

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EXPY Cancellation because of completion of term