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JP3897482B2 - Hydraulic device - Google Patents
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JP3897482B2 - Hydraulic device - Google Patents

Hydraulic device Download PDF

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Publication number
JP3897482B2
JP3897482B2 JP16358499A JP16358499A JP3897482B2 JP 3897482 B2 JP3897482 B2 JP 3897482B2 JP 16358499 A JP16358499 A JP 16358499A JP 16358499 A JP16358499 A JP 16358499A JP 3897482 B2 JP3897482 B2 JP 3897482B2
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JP
Japan
Prior art keywords
valve
intake
hydraulic
filter
exhaust passage
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.)
Expired - Lifetime
Application number
JP16358499A
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Japanese (ja)
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JP2000346006A (en
Inventor
明信 前山
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16358499A priority Critical patent/JP3897482B2/en
Priority to US09/577,620 priority patent/US6382148B1/en
Priority to DE2000127080 priority patent/DE10027080C2/en
Priority to DE20023304U priority patent/DE20023304U1/en
Publication of JP2000346006A publication Critical patent/JP2000346006A/en
Priority to US09/986,782 priority patent/US6622673B2/en
Priority to US10/665,499 priority patent/US6848404B2/en
Priority to US11/020,248 priority patent/US7281506B2/en
Application granted granted Critical
Publication of JP3897482B2 publication Critical patent/JP3897482B2/en
Priority to US11/841,031 priority patent/US20070295413A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34426Oil control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34436Features or method for avoiding malfunction due to foreign matters in oil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34436Features or method for avoiding malfunction due to foreign matters in oil
    • F01L2001/3444Oil filters

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、内燃機関の運転中に吸気弁または排気弁の開閉タイミングを変更するためのバルブタイミング変更装置等の、各種アクチュエータを備えた油圧装置に関する。
【0002】
【従来の技術】
この種の油圧装置は、油圧源と、この油圧源から供給される作動油によって作動するアクチュエータと、これら油圧源とアクチュエータとの間に配置され、油圧源からアクチュエータへの作動油の供給及びアクチュエータからの作動油の排出を制御する制御弁とを備えている。
【0003】
また、前記油圧装置は、作動油中に異物が混入して、制御弁等の作動不良が生じることを未然に防止するために、作動油を濾過するフィルタを備えており、このフィルタは、一般に油圧源から制御弁に通じる通路のみに設けられている(例えば、特開平8−14015号公報参照)。
【0004】
【発明が解決しようとする課題】
しかしながら、前記従来例にあっては、フィルタが油圧源から制御弁に通じる通路のみに設けられているから、油圧源からの作動油を濾過することはできるが、アクチュエータを循環した作動油を濾過することができない。このため、何らかの理由によりアクチュエータの内部で生じた異物が制御弁内に侵入して、この制御弁の作動不良が生じる虞がある。
【0005】
本発明は前記従来の実情に鑑みて案出されたもので、作動油中の異物により制御弁の作動不良が生じることを有利に防止することが可能な油圧装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
そこで、請求項1に記載の発明は、油圧源と、この油圧源から供給される作動油によって吸気弁または排気弁の開閉タイミングを進角方向または遅角方向に制御するバルブタイミング変更装置と、前記油圧源とバルブタイミング変更装置との間に配置され、油圧源からバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路への作動油の供給及びバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路からの作動油の排出を制御する制御弁とを備え、前記制御弁は、筒状のバルブボディと、該バルブボディの筒状内部に摺動自在に収容されたスプール弁とを備え、前記バルブボディには、前記油圧源に一端が接続された供給通路の他端が臨む開口部と、前記バルブタイミング変更装置に各一端が接続された前記各吸排通路の他端が臨む開口部がそれぞれ形成されていると共に、該各開口部はバルブボディの胴部外周に形成された周溝に臨んでそれぞれ開口形成され、前記各吸排通路側の前記各周溝内に、該各開口部を含む各周溝の外周側全周を濾過体が覆い、かつ前記バルブタイミング変更装置から前記各吸排通路を通って前記制御弁のバルブボディ内に排出される作動油に抵抗を与えて脈圧を減衰させるほぼ円筒状のフィルタをそれぞれ設けたことを特徴としている。
【0007】
また、請求項2に記載の発明は、油圧源と、この油圧源から供給される作動油によって吸気弁または排気弁の開閉タイミングを進角方向または遅角方向に制御するバルブタイミング変更装置と、前記油圧源とバルブタイミング変更装置との間に配置され、油圧源からバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路への作動油の供給及びバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路からの作動油の排出を制御する制御弁とを備え、前記制御弁は、筒状のバルブボディと、該バルブボディの筒状内部に摺動自在に収容されたスプール弁とを備え、前記バルブボディには、前記油圧源に一端が接続された供給通路の他端が臨む開口部と、前記バルブタイミング変更装置に各一端が接続された前記各吸排通路の他端が臨む開口部がそれぞれ形成されていると共に、該各開口部はバルブボディの胴部外周に形成された周溝に臨んでそれぞれ開口形成され、前記供給通路側の周溝内と前記各吸排通路側の前記各周溝内に、前記各開口部を含む各周溝の外周側全周を濾過体が覆うほぼ円筒状のフィルタをそれぞれ設け、前記各吸排通路側の前記各周溝内に設けられたフィルタは、前記バルブタイミング変更装置から前記各吸排通路を通って前記制御弁のバルブボディ内に排出される作動油に抵抗を与えて脈圧を減衰させることを特徴としている。
【0008】
また、請求項3に記載の発明は、請求項1及び2記載の発明の構成において、前記フィルタは、一端側にフック部が形成され、他端側にフック係止部が形成されており、フック係止部にフック部を係止することによってバルブボディに取付けられていることを特徴としている。
【0009】
請求項4記載の発明は、請求項1〜3のいずれかの記載の発明の構成において、前記フィルタは、濾過体と、この濾過体の外周側に設けられた枠体とから形成されていることを特徴としている。
【0010】
斯かる構成において、前記制御弁が制御装置等によって制御されることにより、油圧源からバルブタイミング変更装置への作動油の供給及びバルブタイミング変更装置からの作動油の排出が制御される。具体的には請求項1あるいは記載の発明によれば、前記スプール弁が駆動されることによって、このスプール弁がバルブボディの開口部を開閉制御して、それぞれの開口部を通過する作動油の流量を制御する。
【0011】
これによって、前記制御弁を介してバルブタイミング変更装置に導かれる作動油が制御されることになり、バルブタイミング変更装置の作動が制御されることになる。
【0012】
ここで、前記油圧源から制御弁を介してバルブタイミング変更装置に導かれる作動油は、油圧源と制御弁との間及びバルブタイミング変更装置と制御弁との間に設けられたフィルタによって、濾過される。また、前記バルブタイミング変更装置から制御弁を介して排出される作動油は、バルブタイミング変更装置と制御弁との間に設けられたフィルタによって、濾過される。つまり、前記油圧源から制御弁に向かう作動油及びバルブタイミング変更装置から制御弁に向かう作動油は、それぞれフィルタによって、濾過されることになる。
【0013】
これによって、前記バルブタイミング変更装置の摩耗等により作動油中に混入した異物はフィルタによって取り除かれ、制御弁内に侵入することが防止される。
【0014】
このため、前記制御弁内には清浄な作動油のみが導かれることになるから、制御弁は円滑に作動することになる。
【0015】
したがって、作動油中の異物により制御弁の作動不良が生じることを有利に防止することが可能な油圧装置が得られる。
【0016】
しかも、各フィルターは、バルブタイミング変更装置と制御弁との間に設けてあるから、このフィルタによって、作動油を過すると共に、カムシャフトに作用する反転トルクによる回転位相の変化を可及的に減じることができる。即ち、前記バルブタイミング変更装置は、カムシャフトに作用する反転トルクによって、その内部で脈圧を生じ、その作動油の脈圧が制御弁に作用して制御弁から漏れる虞がある。前記制御弁から作動油の漏れが生じると、カムシャフトの回転位相が意に反して変更されるが、本発明にあっては、作動油の脈圧が制御弁に作用しようとするとき、フィルタが抵抗となって作動油の脈動を減衰させる。このため、前記カムシャフトに作用する反転トルクによる影響を減じることができるのである。
【0017】
また、請求項1及び記載の発明によれば、前記供給通路側の周溝内、あるいは該供給通路側の各周溝内や前記各吸排通路側の前記各周溝内に、前記各開口部を含む各周溝の外周側全周を濾過体が覆うほぼ円筒状のフィルタをそれぞれ設けことから、フィルタを油圧通路の途中に設ける場合に比較して、取付けが容易となると共に、油圧源と制御弁との間及びバルブタイミング変更装置と制御弁との間の油圧通路の全範囲に亘る作動油が過の対象となって、過される。
【0018】
また、請求項3記載の発明によれば、前記フィルタが、フック係止部にフック部を係止することによってバルブボディに取付けられるから、容易にバルブボディに取付けることが可能となる。
【0019】
また、請求項4記載の発明によれば、前記フィルタが、過体と、この過体の外周側に設けられた枠体とから形成されているから、取り扱いが容易であると共に、取付けが容易となる。
【0020】
【発明の実施の形態】
以下、本発明の実施の形態を、図面に基づいて詳述する。
【0021】
図1は本発明の油圧装置の参考例を示し、図2は図1に示す制御弁の断面図である。
【0022】
図において、1は油圧源、2は油圧源1から供給される作動油によって作動するバルブタイミング変更装置である。3は前記油圧源1とバルブタイミング変更装置2との間に配置された制御弁で、この制御弁3は油圧源1からバルブタイミング変更装置2への作動油の供給及びバルブタイミング変更装置2からの作動油の排出を制御するようになっている。
【0023】
前記油圧源1は油圧ポンプを主要素として構成されており、この油圧源1と制御弁3との間は、供給通路4によって連通している。
【0024】
前記バルブタイミング変更装置2は、内燃機関の回転に同期して回転されるスプロケット5と、図外の吸気弁または排気弁を駆動するカムシャフト6との間に設けられ、作動油によって、スプロケット5に対してカムシャフト6を相対回動させて吸気弁または排気弁の開閉タイミングを変更するようになっている。即ち、前記スプロケット5は外周に巻着されたタイミングチェーン7を介して、図外のクランクシャフトに連結駆動されており、また、カムシャフト6は、このカムシャフト6に形成した図外のカムによって吸気弁または排気弁を開閉駆動するようになっている。また、前記バルブタイミング変更装置2と制御弁3との間は、吸排通路8,9によって連通している。
【0025】
前記制御弁3は筒状のバルブボディ10と、このバルブボディ10の筒状内部に摺動自在に収容されるスプール弁11とを備えている。
【0026】
前記バルブディ10には、油圧源1に連通する開口部12、バルブタイミング変更装置2に連通する開口部13,14が形成してある。即ち、前記開口部12は供給通路4を介して油圧源1に連通するようになっており、開口部13は吸排通路8を介してバルブタイミング変更装置2に連通し、開口部14は吸排通路9を介してバルブタイミング変更装置2に連通するようになっている。また、前記バルブボディ10には開口部15が形成してあり、この開口部15はドレン通路16を介して貯油タンク17に連通するようになっている。前記開口部12,13,14,15は、バルブボディ10の胴部外周に形成した周溝22,23,24,25に臨んでそれぞれ開口している。
【0027】
前記スプール弁11は、バルブボディ10内に設けたばね部材28によって電磁ソレノイド29側に付勢されており、この電磁ソレノイド29によって駆動され、バルブボディ10内を摺動可能である。前記スプール弁11はバルブボディ10内を摺動することによって、バルブボディ10に形成した開口部12,13,14,15をそのランド部30,31で開閉可能である。
【0028】
前記ばね部材28は一端側がばね受け32によって支持されており、このばね受け32は止め輪33によって抜脱が防止されている。また、前記電磁ソレノイド29の接続端には接続端子34が設けられ、図外の制御装置及び電源に接続されるようになっている。
【0029】
また、前記油圧源1と制御弁3との間にフィルタ37が設けられ、バルブタイミング変更装置2と制御弁3との間にフィルタ38,39が設けられている。詳しくは、前記フィルタ37は油圧源1と制御弁3との間の供給通路4の途中に設けられており、フィルタ38はバルブタイミング変更装置2と制御弁3との間の吸排通路8の途中に設けられており、フィルタ39はバルブタイミング変更装置2と制御弁3との間の吸排通路9の途中に設けられている。
【0030】
次に、斯かる構成の油圧装置の作用について説明する。
【0031】
先ず、前記電磁ソレノイド29に図外の制御装置及び電源から制御電流が供給されない状態(非通電状態)では、スプール弁11はばね部材28のばね力によって図1において左方向に付勢されており、スプール弁28は所定位置に停止している(図1参照)。
【0032】
前記非通電状態では、スプール弁11のランド部30がバルブボディ10の開口部13を開口部12側において所定面積開口すると共に、ランド部31が開口部14を開口部15側において所定面積開口している。このため、前記油圧源1から供給通路4、開口部12を介してバルブボディ10の内部に導かれた作動油は、開口部13及び吸排通路8を介してバルブタイミング変更装置2に導かれる。一方、吸排通路9は、開口部14、開口部15及びドレン通路16を介して貯油タンク17に連通している。
【0033】
これによって、前記バルブタイミング変更装置12が所定の動作をし、例えば、カムシャフト6がスプロケット5に対して進角方向に制御されることになる。
【0034】
次に、前記電磁ソレノイド29に制御電流が供給されると(通電状態)、スプール弁11が駆動される。
【0035】
前記電磁ソレノイド29によってスプール弁11が駆動され、このスプール弁11が図1において右方向に移動することによって、スプール弁11のランド部30がバルブボディ10の開口部13を開口部15側において所定面積開口すると共に、ランド部31が開口部14を開口部12側において所定面積開口することになる。このため、前記油圧源1から供給通路4、開口部12を介してバルブボディ10の内部に導かれた作動油は、開口部14及び吸排通路9を介してバルブタイミング変更装置2に導かれる。一方、吸排通路8は、開口部13、開口部15及びドレン通路16を介して貯油タンク17に連通する。
【0036】
これによって、前記バルブタイミング変更装置2が所定の動作をし、例えば、カムシャフト6がスプロケット5に対して遅角方向に制御されることになる。
【0038】
ここで、前記油圧源1から制御弁3を介してバルブタイミング変更装置2に導かれる作動油は、油圧源1と制御弁3との間に設けられたフィルタ37で濾過されると共に、バルブタイミング変更装置2と制御弁3との間に設けられたフィルタ38またはフィルタ39によって、濾過される。また、前記バルブタイミング変更装置2から制御弁3を介して排出される作動油は、バルブタイミング変更装置2と制御弁3との間に設けられたフィルタ38またはフィルタ39によって、濾過される。つまり、前記油圧源1から制御弁3に向かう作動油はフィルタ37で過され、バルブタイミング変更装置2から制御弁3に向かう作動油はフィルタ38,39で濾過される。
【0038】
これによって、前記バルブタイミング変更装置2の摩耗等により作動油中に混入した異物はフィルタ38またはフィルタ39によって取り除かれ、制御弁3内に侵入することが防止される。
【0039】
このため、前記制御弁3内には清浄な作動油のみが導かれることになるから、制御弁3は円滑に作動することになる。
【0040】
したがって、作動油中の異物により制御弁3の作動不良が生じることを有利に防止することが可能な油圧装置が得られる。
【0041】
また、前記バルブタイミング変更装置2と制御弁3との間にフィルタ38,39が設けてあるから、このフィルタ38,39によって、作動油を濾過すると共に、カムシャフト6に作用する反転トルクによる回転位相の変化を可及的に減じることができる。即ち、前記バルブタイミング変更装置は、カムシャフト6に作用する反転トルクによって、その内部で脈圧を生じ、その作動油の脈圧が制御弁3に作用して制御弁から漏れる虞がある。前記制御弁3から作動油の漏れが生じると、カムシャフト6の回転位相が意に反して変更されるが、本発明にあっては、作動油の脈圧が制御弁3に作用しようとするとき、フィルタ38,39が抵抗となって作動油の脈動を減衰させる。このため、前記カムシャフト6に作用する反転トルクによる影響を減じることができるのである。
【0042】
図3乃至図6は本発明の第1の実施の形態を示す図面で、この実施の形態が図1及び2の参考例と異なるところは、前記バルブタイミング変更装置2と制御弁3との間に設けるフィルタ38,39を、バルブボディ10の開口部13,14にそれぞれ設けた点である。以下、この実施に形態について詳述する。尚、説明に際して、前記参考例と同一構成部分には同一符号を付し、その重複する説明を省略する。
【0043】
即ち、前記フィルタ38はバルブボディ10の開口部13に設けられ、フィルタ39は同じく開口部14に設けられている。
【0044】
前記フィルタ38,39のそれぞれは、濾過体41と、この濾過体41の外周側に設けられた枠体42とからなり、自由状態において略C字状に形成してある。前記濾過体41は金属線材からメッシュ状に形成され、枠体42は合成樹脂材料から形成される。
【0045】
前記フィルタ38,39のそれぞれには、一端側にフック部43が形成され、他端側にフック係止部44が形成してある。また、略C字状の内周側に突起状を呈するように、軸方向の桟部材45が複数個形成してあり、この桟部材45の1つは端部に形成され、フック係止部44を兼ねている(図5参照)。
【0046】
前記フィルタ38,39のそれぞれは、バルブボディ10に、詳しくはバルブボディ10の周溝23,24内に取付けられるようになっており、バルブボディ10に取付けられた状態では、フック係止部44にフック部43を係止することによって全体として略環状となっている。前記フィルタ38,39のそれぞれは、バルブボディ10の周溝23,24内に取付けられることによって、バルブボディ10の軸方向に正しく位置決めされ、バルブボディ10の開口部13,14に対して正しく配置される。
【0047】
また、前記フィルタ38,39のそれぞれは、自由状態で略C字状に形成されているから、フック係止部44にフック部43を係止することによって略環状とされた状態では、フック部43とフック係止部44には引張力が作用することになり、強固な係止が成就される。
【0048】
斯かる構成においても、前記制御弁3に向かう作動油はフィルタ37,37,38によって、濾過されるため、制御弁3内には清浄な作動油のみが導かれることになるから、制御弁3は円滑に作動することになる。
【0049】
したがって、作動油中の異物により制御弁3の作動不良が生じることを有利に防止することが可能な油圧装置が得られる。
【0050】
加えて、前記フィルタ38,39がバルブボディ10の開口部13,14にそれぞれ設けられているから、フィルタ38,39のそれぞれを吸排通路8,9の途中に設ける場合に比較して、取付けが容易となると共に、バルブタイミング変更装置2と制御弁3との間の吸排通路8,9の全範囲に亘る作動油が濾過の対象となって、濾過される。
【0051】
また、前記フィルタ38,39のそれぞれは、フック係止部44にフック部43を係止することによってバルブボディ10に取付けられるから、容易にバルブボディ10に取付けることが可能となる。
【0052】
また、前記フィルタ38,39のそれぞれは、濾過体41と、この濾過体41の外周側に設けられた枠体42とから形成されているから、取り扱いが容易であると共に、取付けが容易となる。
【0053】
図7及び図8は本発明の第2の実施の形態を示す図面で、この実施の形態が前記参考例及び第1の実施の形態と変わるところは、前記油圧源1と制御弁との間に設けるフィルタ37及び、バルブタイミング変更装置2と制御弁3との間に設けるフィルタ38,39を、バルブボディ10の開口部12,13,14(周溝22,23,24)にそれぞれ設けた点である。以下、この実施に形態について詳述する。尚、説明に際して、前記参考例及び第1の実施の形態と同一構成部分には同一符号を付し、その重複する説明を省略する。
【0054】
即ち、前記フィルタ37はバルブボディ10の開口部12を含む周溝22に設けられ、フィルタ38は同じく開口部13を含む周溝23に設けられ、フィルタ39は同じく開口部14を含む周溝24に設けられている。
【0055】
前記フィルタ37は、前記第1の実施の形態で述べたフィルタ38,39と同様に構成されている。即ち、前記フィルタ37,38,39は共通部品として使用される。
【0056】
斯かる構成においても、前記実施の形態と同様の作用、効果が得られる。
【0057】
以上、実施の形態を図面に基づいて説明したが、具体的構成はこの実施の形態に限られるものではなく、発明の要旨を逸脱しない範囲で変更可能である。
【0058】
【発明の効果】
以上、詳細に説明したように、本発明によれば、作動油中の異物により制御弁の作動不良が生じることを有利に防止することが可能な油圧装置が得られる。
しかも、この発明によれば、前記バルブタイミング変更装置と制御弁との間にフィルタが設けてあるから、このフィルタによって、カムシャフトに作用する反転トルクによる回転位相の変化を可及的に減じることができる。即ち、前記バルブタイミング変更装置は、カムシャフトに作用する反転トルクによって、その内部で脈圧を生じ、その作動油の脈圧が制御弁に作用して制御弁から漏れる虞がある。前記制御弁から作動油の漏れが生じると、カムシャフトの回転位相が意に反して変更されるが、本発明にあっては、作動油の脈圧が制御弁に作用しようとするとき、フィルタが抵抗となって作動油の脈動を減衰させる。このため、前記カムシャフトに作用する反転トルクによる影響を減じることができるのである。
【図面の簡単な説明】
【図1】 本発明の参考例を示す油圧装置の説明図である。
【図2】 図1に示す制御弁の断面図である。
【図3】 本発明の第1の実施の形態を示す油圧装置の説明図である。
【図4】 図3に示す制御弁の断面図である。
【図5】 図3に示すフィルタの自由状態を、正面図(a)、正面図(a)の矢印B方向の拡大矢視図(b)で示す図面である。
【図6】 図3に示すフィルタの装着状態を、正面図(a)、正面図(a)のB部拡大図(b)で示す図面である。
【図7】 本発明の第2の実施の形態を示す油圧装置の説明図である。
【図8】 図7に示す制御弁の断面図である。
【符号の説明】
1 油圧源
2 バルブタイミング変更装置
3 制御弁
10 バルブボディ
11 スプール弁
12,13,14 開口部
22,23,24 周溝
37,38,39 フィルタ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydraulic apparatus including various actuators such as a valve timing changing device for changing the opening / closing timing of an intake valve or an exhaust valve during operation of an internal combustion engine.
[0002]
[Prior art]
This type of hydraulic apparatus includes a hydraulic source, an actuator that is operated by hydraulic oil supplied from the hydraulic source, and a hydraulic oil supply from the hydraulic source to the actuator and an actuator that is disposed between the hydraulic source and the actuator. And a control valve for controlling discharge of hydraulic oil from the engine.
[0003]
In addition, the hydraulic device includes a filter for filtering the hydraulic oil in order to prevent foreign matters from being mixed into the hydraulic oil and causing malfunction of the control valve and the like. It is provided only in the passage leading from the hydraulic pressure source to the control valve (see, for example, JP-A-8-14015).
[0004]
[Problems to be solved by the invention]
However, in the conventional example, since the filter is provided only in the passage leading from the hydraulic source to the control valve, the hydraulic fluid from the hydraulic source can be filtered, but the hydraulic fluid circulating through the actuator is filtered. Can not do it. For this reason, there is a possibility that foreign matters generated inside the actuator for some reason enter the control valve and cause malfunction of the control valve.
[0005]
The present invention has been devised in view of the above-described conventional situation, and an object of the present invention is to provide a hydraulic device that can advantageously prevent malfunction of a control valve due to foreign matter in hydraulic oil. .
[0006]
[Means for Solving the Problems]
Accordingly, an invention according to claim 1 is a hydraulic pressure source, and a valve timing changing device that controls the opening / closing timing of an intake valve or an exhaust valve in an advance angle direction or a retard angle direction with hydraulic oil supplied from the hydraulic pressure source, Supply of hydraulic oil and valve from the hydraulic source to the intake / exhaust passage controlled in the advance direction of the valve timing change device or the intake / exhaust passage controlled in the retard direction of the valve timing change device, arranged between the hydraulic source and the valve timing change device A control valve for controlling the discharge of hydraulic oil from the intake / exhaust passage controlled in the advance direction or the intake / exhaust passage controlled in the retard direction of the timing changing device, the control valve comprising a cylindrical valve body; A spool valve slidably housed inside the tubular body of the valve body, and the valve body has an opening facing the other end of a supply passage connected at one end to the hydraulic power source, The valve timing changing device is formed with an opening facing the other end of each intake / exhaust passage connected to each end, and each opening faces a circumferential groove formed on the outer periphery of the body of the valve body. in the respective openings formed, wherein each circumferential groove of each intake passage side, the respective intake and the outer peripheral side entire circumference of the circumferential groove the filter body is not covered, and from the valve timing changing device including a respective opening A substantially cylindrical filter that attenuates the pulse pressure by applying resistance to the hydraulic oil discharged through the passage and into the valve body of the control valve is provided.
[0007]
The invention according to claim 2 is a hydraulic pressure source, a valve timing changing device for controlling the opening / closing timing of the intake valve or the exhaust valve in the advance direction or the retard direction by the hydraulic oil supplied from the hydraulic source, Supply of hydraulic oil and valve from the hydraulic source to the intake / exhaust passage controlled in the advance direction of the valve timing change device or the intake / exhaust passage controlled in the retard direction of the valve timing change device, arranged between the hydraulic source and the valve timing change device A control valve for controlling the discharge of hydraulic oil from the intake / exhaust passage controlled in the advance direction or the intake / exhaust passage controlled in the retard direction of the timing changing device, the control valve comprising a cylindrical valve body; A spool valve slidably accommodated inside the tubular body of the valve body, the valve body having an opening facing the other end of a supply passage connected at one end to the hydraulic power source, and a front The valve timing changing device is formed with an opening facing the other end of each intake / exhaust passage connected to each end, and each opening faces a circumferential groove formed on the outer periphery of the body of the valve body. Each of the openings is formed in a substantially cylindrical shape in which the filter body covers the entire outer periphery of each circumferential groove including each opening in the circumferential groove on the supply passage side and in each circumferential groove on the intake / exhaust passage side. Filters are provided , and the filters provided in the circumferential grooves on the intake / exhaust passages are used as hydraulic oil discharged from the valve timing changing device through the intake / exhaust passages into the valve body of the control valve. It is characterized by damping resistance and pulse pressure .
[0008]
The invention according to claim 3 is the configuration of the invention according to claims 1 and 2, wherein the filter has a hook portion formed on one end side and a hook locking portion formed on the other end side, The hook body is attached to the valve body by locking the hook portion to the hook locking portion.
[0009]
According to a fourth aspect of the present invention, in the configuration of the first aspect of the present invention, the filter is formed of a filter body and a frame body provided on the outer peripheral side of the filter body. It is characterized by that.
[0010]
In such a configuration, the control valve is controlled by a control device or the like, thereby controlling the supply of hydraulic oil from the hydraulic pressure source to the valve timing changing device and the discharge of hydraulic oil from the valve timing changing device. Specifically, according to the first or second aspect of the present invention, when the spool valve is driven, the spool valve controls opening / closing of the opening of the valve body and passes through each opening. Control the oil flow rate.
[0011]
As a result, the hydraulic fluid guided to the valve timing changing device via the control valve is controlled, and the operation of the valve timing changing device is controlled.
[0012]
Here, the hydraulic fluid guided from the hydraulic source to the valve timing changing device via the control valve is filtered by a filter provided between the hydraulic source and the control valve and between the valve timing changing device and the control valve. Is done. The hydraulic fluid discharged from the valve timing changing device via the control valve is filtered by a filter provided between the valve timing changing device and the control valve. In other words, the hydraulic fluid from the hydraulic pressure source to the control valve and the hydraulic fluid from the valve timing changing device to the control valve are filtered by the filters.
[0013]
As a result, foreign matter mixed in the hydraulic oil due to wear of the valve timing changing device or the like is removed by the filter and is prevented from entering the control valve.
[0014]
For this reason, only clean hydraulic fluid is introduced into the control valve, so that the control valve operates smoothly.
[0015]
Therefore, it is possible to obtain a hydraulic apparatus that can advantageously prevent the malfunction of the control valve due to the foreign matter in the hydraulic oil.
[0016]
Moreover, each filter, since is provided between the variable valve timing device and the control valve, this filter, as well as over-filtration hydraulic oil, as much as possible the change of the rotational phase by reversing torque acting on the camshaft Can be reduced to That is, the valve timing changing device generates a pulse pressure inside by the reverse torque acting on the camshaft, and the pulse pressure of the hydraulic oil may act on the control valve and leak from the control valve. When hydraulic oil leaks from the control valve, the rotational phase of the camshaft is changed unexpectedly. In the present invention, when the pulse pressure of hydraulic oil is about to act on the control valve, the filter Becomes resistance and attenuates pulsation of hydraulic oil. For this reason, the influence by the reverse torque which acts on the camshaft can be reduced.
[0017]
Further, according to the invention described in claim 1 and 2, to the supply passage side of the circumferential groove, or the feed in each circumferential groove of the aisle and wherein in each circumferential groove of each intake passage side, each Since a substantially cylindrical filter that covers the entire circumference of the outer peripheral side of each circumferential groove including the opening is provided by the filter body, it is easier to install and the hydraulic pressure than when the filter is provided in the middle of the hydraulic passage. source and become, and between the valve timing adjusting device for the control valve and the target hydraulic fluid over the entire range of the hydraulic passage of excessive filtration between the control valve and bulk filtration.
[0018]
According to the invention of claim 3, since the filter is attached to the valve body by engaging the hook portion with the hook engaging portion, it can be easily attached to the valve body.
[0019]
Further, according to the invention of claim 4, wherein the filter comprises a Filtration body with since the filtration is formed from the over-body frame provided on the outer peripheral side of, it is easy to handle, mounted Becomes easy.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
[0021]
FIG. 1 shows a reference example of the hydraulic apparatus of the present invention, and FIG. 2 is a cross-sectional view of the control valve shown in FIG.
[0022]
In the figure, reference numeral 1 is a hydraulic pressure source, and 2 is a valve timing changing device that is operated by hydraulic fluid supplied from the hydraulic pressure source 1. Reference numeral 3 denotes a control valve disposed between the hydraulic power source 1 and the valve timing changing device 2. The control valve 3 supplies hydraulic oil from the hydraulic power source 1 to the valve timing changing device 2 and from the valve timing changing device 2. The discharge of hydraulic oil is controlled.
[0023]
The hydraulic source 1 includes a hydraulic pump as a main element, and the hydraulic source 1 and the control valve 3 communicate with each other through a supply passage 4.
[0024]
The valve timing changing device 2 is provided between a sprocket 5 that is rotated in synchronism with the rotation of the internal combustion engine and a camshaft 6 that drives an intake valve or an exhaust valve (not shown). On the other hand, the camshaft 6 is relatively rotated to change the opening / closing timing of the intake valve or the exhaust valve. That is, the sprocket 5 is connected and driven to a crankshaft (not shown) via a timing chain 7 wound around the outer periphery, and the camshaft 6 is driven by a cam (not shown) formed on the camshaft 6. The intake valve or exhaust valve is driven to open and close. Further, the valve timing changing device 2 and the control valve 3 communicate with each other through intake / exhaust passages 8 and 9.
[0025]
The control valve 3 includes a tubular valve body 10 and a spool valve 11 slidably accommodated in the tubular body of the valve body 10.
[0026]
The valve di 10 is formed with an opening 12 communicating with the hydraulic power source 1 and openings 13 and 14 communicating with the valve timing changing device 2. That is, the opening 12 communicates with the hydraulic power source 1 through the supply passage 4, the opening 13 communicates with the valve timing changing device 2 through the intake / exhaust passage 8, and the opening 14 communicates with the intake / exhaust passage. 9 communicates with the valve timing changing device 2. An opening 15 is formed in the valve body 10, and the opening 15 communicates with an oil storage tank 17 through a drain passage 16. The openings 12, 13, 14, 15 open to the circumferential grooves 22, 23, 24, 25 formed on the outer periphery of the body of the valve body 10.
[0027]
The spool valve 11 is urged toward the electromagnetic solenoid 29 by a spring member 28 provided in the valve body 10, and is driven by the electromagnetic solenoid 29 to be slidable in the valve body 10. The spool valve 11 can open and close the opening portions 12, 13, 14, and 15 formed in the valve body 10 by the land portions 30 and 31 by sliding in the valve body 10.
[0028]
One end of the spring member 28 is supported by a spring receiver 32, and the spring receiver 32 is prevented from being removed by a retaining ring 33. A connection terminal 34 is provided at the connection end of the electromagnetic solenoid 29 so as to be connected to a control device and a power source not shown.
[0029]
Further, a filter 37 is provided between the hydraulic power source 1 and the control valve 3, and filters 38 and 39 are provided between the valve timing changing device 2 and the control valve 3. Specifically, the filter 37 is provided in the middle of the supply passage 4 between the hydraulic source 1 and the control valve 3, and the filter 38 is in the middle of the intake / exhaust passage 8 between the valve timing changing device 2 and the control valve 3. The filter 39 is provided in the intake / exhaust passage 9 between the valve timing changing device 2 and the control valve 3.
[0030]
Next, the operation of the hydraulic device having such a configuration will be described.
[0031]
First, when a control current is not supplied to the electromagnetic solenoid 29 from a control device and a power source (not shown) (non-energized state), the spool valve 11 is biased leftward in FIG. 1 by the spring force of the spring member 28. The spool valve 28 is stopped at a predetermined position (see FIG. 1).
[0032]
In the non-energized state, the land portion 30 of the spool valve 11 opens the opening portion 13 of the valve body 10 at a predetermined area on the opening portion 12 side, and the land portion 31 opens the opening portion 14 on the opening portion 15 side at a predetermined area. ing. For this reason, the hydraulic fluid guided from the hydraulic power source 1 to the inside of the valve body 10 through the supply passage 4 and the opening 12 is guided to the valve timing changing device 2 through the opening 13 and the intake / exhaust passage 8. On the other hand, the intake / exhaust passage 9 communicates with the oil storage tank 17 through the opening 14, the opening 15, and the drain passage 16.
[0033]
Accordingly, the valve timing changing device 12 performs a predetermined operation, and for example, the camshaft 6 is controlled in the advance direction with respect to the sprocket 5.
[0034]
Next, when a control current is supplied to the electromagnetic solenoid 29 (energized state), the spool valve 11 is driven.
[0035]
The spool valve 11 is driven by the electromagnetic solenoid 29, and the spool valve 11 moves rightward in FIG. 1, whereby the land portion 30 of the spool valve 11 passes the opening portion 13 of the valve body 10 on the opening portion 15 side. In addition to opening the area, the land portion 31 opens the opening 14 to a predetermined area on the opening 12 side. For this reason, the hydraulic fluid guided from the hydraulic power source 1 to the inside of the valve body 10 through the supply passage 4 and the opening 12 is guided to the valve timing changing device 2 through the opening 14 and the intake / exhaust passage 9. On the other hand, the intake / exhaust passage 8 communicates with the oil storage tank 17 through the opening 13, the opening 15, and the drain passage 16.
[0036]
Accordingly, the valve timing changing device 2 performs a predetermined operation, and, for example, the camshaft 6 is controlled in the retarding direction with respect to the sprocket 5.
[0038]
Here, the hydraulic fluid guided from the hydraulic power source 1 to the valve timing changing device 2 via the control valve 3 is filtered by a filter 37 provided between the hydraulic power source 1 and the control valve 3, and also the valve timing. Filtering is performed by a filter 38 or a filter 39 provided between the changing device 2 and the control valve 3. The hydraulic oil discharged from the valve timing changing device 2 through the control valve 3 is filtered by a filter 38 or a filter 39 provided between the valve timing changing device 2 and the control valve 3. That is, the hydraulic fluid towards the control valve 3 from the hydraulic source 1 is bulk filtration in filter 37, the hydraulic oil flowing from the valve timing changing apparatus 2 to the control valve 3 is filtered by the filter 38, 39.
[0038]
As a result, foreign matter mixed in the hydraulic oil due to wear of the valve timing changing device 2 or the like is removed by the filter 38 or the filter 39 and is prevented from entering the control valve 3.
[0039]
For this reason, only clean hydraulic fluid is introduced into the control valve 3, so that the control valve 3 operates smoothly.
[0040]
Therefore, a hydraulic apparatus that can advantageously prevent the malfunction of the control valve 3 due to foreign matter in the hydraulic oil is obtained.
[0041]
Further, since the filters 38 and 39 are provided between the valve timing changing device 2 and the control valve 3, the hydraulic oil is filtered by the filters 38 and 39, and the rotation by the reverse torque acting on the camshaft 6 is performed. Phase change can be reduced as much as possible. In other words, the valve timing changing device may generate a pulse pressure therein due to the reverse torque acting on the camshaft 6, and the hydraulic oil pulse pressure may act on the control valve 3 and leak from the control valve. When hydraulic oil leaks from the control valve 3, the rotational phase of the camshaft 6 is changed unexpectedly. In the present invention, the pulse pressure of hydraulic oil tends to act on the control valve 3. At this time, the filters 38 and 39 become resistances to attenuate the pulsation of the hydraulic oil. For this reason, the influence by the reverse torque which acts on the camshaft 6 can be reduced.
[0042]
FIGS. 3 to 6 show the first embodiment of the present invention. This embodiment differs from the reference example of FIGS. 1 and 2 between the valve timing changing device 2 and the control valve 3. The filters 38 and 39 are provided in the openings 13 and 14 of the valve body 10, respectively. Hereinafter, this embodiment will be described in detail. In the description, the same components as those in the reference example are denoted by the same reference numerals, and redundant description thereof is omitted.
[0043]
That is, the filter 38 is provided in the opening 13 of the valve body 10, and the filter 39 is also provided in the opening 14.
[0044]
Each of the filters 38 and 39 includes a filter body 41 and a frame body 42 provided on the outer peripheral side of the filter body 41, and is formed in a substantially C shape in a free state. The filter body 41 is formed in a mesh shape from a metal wire, and the frame body 42 is formed from a synthetic resin material.
[0045]
Each of the filters 38 and 39 has a hook portion 43 formed on one end side and a hook locking portion 44 formed on the other end side. Also, a plurality of axial crosspieces 45 are formed so as to form a protrusion on the substantially C-shaped inner peripheral side, and one of the crosspieces 45 is formed at the end, and the hook locking portion 44 (see FIG. 5).
[0046]
Each of the filters 38 and 39 is attached to the valve body 10, more specifically, in the circumferential grooves 23 and 24 of the valve body 10. By engaging the hook portion 43 with the hook portion 43, the whole is substantially annular. Each of the filters 38 and 39 is mounted in the circumferential grooves 23 and 24 of the valve body 10, so that the filters 38 and 39 are correctly positioned in the axial direction of the valve body 10 and correctly disposed with respect to the openings 13 and 14 of the valve body 10. Is done.
[0047]
In addition, since each of the filters 38 and 39 is formed in a substantially C shape in a free state, in a state where the hook portion 43 is locked to the hook locking portion 44 and is formed into a substantially ring shape, A tensile force acts on 43 and the hook locking part 44, and a firm locking is achieved.
[0048]
Even in such a configuration, since the hydraulic oil directed to the control valve 3 is filtered by the filters 37, 37, and 38, only clean hydraulic oil is introduced into the control valve 3. Will operate smoothly.
[0049]
Therefore, it is possible to obtain a hydraulic apparatus that can advantageously prevent the malfunction of the control valve 3 due to the foreign matter in the hydraulic oil.
[0050]
In addition, since the filters 38 and 39 are provided in the openings 13 and 14 of the valve body 10, respectively, the filters 38 and 39 are attached in comparison with the case where the filters 38 and 39 are provided in the intake and exhaust passages 8 and 9. It becomes easy, and the working oil over the whole range of the intake / exhaust passages 8 and 9 between the valve timing changing device 2 and the control valve 3 is filtered and filtered.
[0051]
Further, since each of the filters 38 and 39 is attached to the valve body 10 by engaging the hook portion 43 with the hook engaging portion 44, it can be easily attached to the valve body 10.
[0052]
Further, each of the filters 38 and 39 is formed of a filter body 41 and a frame body 42 provided on the outer peripheral side of the filter body 41, so that it is easy to handle and easy to attach. .
[0053]
7 and 8 show a second embodiment of the present invention. This embodiment differs from the reference example and the first embodiment in that the hydraulic power source 1 and the control valve 3 are different. A filter 37 provided between them and filters 38 and 39 provided between the valve timing changing device 2 and the control valve 3 are provided in the openings 12, 13, 14 (circumferential grooves 22, 23, 24) of the valve body 10, respectively. It is a point. Hereinafter, this embodiment will be described in detail. In the description, the same components as those in the reference example and the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.
[0054]
That is, the filter 37 is provided in the circumferential groove 22 including the opening 12 of the valve body 10, the filter 38 is provided in the circumferential groove 23 including the opening 13, and the filter 39 is also included in the circumferential groove 24 including the opening 14. Is provided.
[0055]
The filter 37 is configured in the same manner as the filters 38 and 39 described in the first embodiment. That is, the filters 37, 38 and 39 are used as common parts.
[0056]
Even in such a configuration, the same operation and effect as the above-described embodiment can be obtained.
[0057]
Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment and can be changed without departing from the gist of the invention.
[0058]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to obtain a hydraulic apparatus that can advantageously prevent malfunction of the control valve due to foreign matters in the hydraulic oil.
Moreover, according to the present invention, since the filter is provided between the valve timing changing device and the control valve, the change of the rotational phase due to the reverse torque acting on the camshaft is reduced as much as possible by this filter. Can do. That is, the valve timing changing device generates a pulse pressure inside by the reverse torque acting on the camshaft, and the pulse pressure of the hydraulic oil may act on the control valve and leak from the control valve. When hydraulic oil leaks from the control valve, the rotational phase of the camshaft is changed unexpectedly. In the present invention, when the pulse pressure of hydraulic oil is about to act on the control valve, the filter Becomes resistance and attenuates pulsation of hydraulic oil. For this reason, the influence by the reverse torque which acts on the camshaft can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a hydraulic apparatus showing a reference example of the present invention.
FIG. 2 is a cross-sectional view of the control valve shown in FIG.
FIG. 3 is an explanatory diagram of a hydraulic apparatus showing a first embodiment of the present invention.
4 is a cross-sectional view of the control valve shown in FIG.
FIG. 5 is a drawing showing the free state of the filter shown in FIG. 3 as a front view (a) and an enlarged arrow view (b) in the direction of arrow B of the front view (a).
FIG. 6 is a front view (a) and an enlarged view (b) of a portion B of the front view (a), showing a state where the filter shown in FIG. 3 is mounted.
FIG. 7 is an explanatory diagram of a hydraulic apparatus showing a second embodiment of the present invention.
8 is a cross-sectional view of the control valve shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hydraulic source 2 Valve timing change apparatus 3 Control valve 10 Valve body 11 Spool valve 12, 13, 14 Opening part
22, 23, 24 Circumferential groove 37, 38, 39 Filter

Claims (4)

油圧源と、
この油圧源から供給される作動油によって吸気弁または排気弁の開閉タイミングを進角方向または遅角方向に制御するバルブタイミング変更装置と、
前記油圧源とバルブタイミング変更装置との間に配置され、油圧源からバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路への作動油の供給及びバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路からの作動油の排出を制御する制御弁とを備え、
前記制御弁は、筒状のバルブボディと、該バルブボディの筒状内部に摺動自在に収容されたスプール弁とを備え、
前記バルブボディには、前記油圧源に一端が接続された供給通路の他端が臨む開口部と、前記バルブタイミング変更装置に各一端が接続された前記各吸排通路の他端が臨む開口部がそれぞれ形成されていると共に、該各開口部はバルブボディの胴部外周に形成された周溝に臨んでそれぞれ開口形成され、
前記各吸排通路側の前記各周溝内に、該各開口部を含む各周溝の外周側全周を濾過体が覆い、かつ前記バルブタイミング変更装置から前記各吸排通路を通って前記制御弁のバルブボディ内に排出される作動油に抵抗を与えて脈圧を減衰させるほぼ円筒状のフィルタをそれぞれ設けたことを特徴とする油圧装置。
A hydraulic source;
A valve timing changing device that controls the opening / closing timing of the intake valve or the exhaust valve in the advance direction or the retard direction by the hydraulic oil supplied from the hydraulic source;
Supply of hydraulic oil and valve from the hydraulic source to the intake / exhaust passage controlled in the advance direction of the valve timing change device or the intake / exhaust passage controlled in the retard direction of the valve timing change device, arranged between the hydraulic source and the valve timing change device A control valve for controlling the discharge of hydraulic oil from the intake / exhaust passage controlled in the advance direction of the timing changing device or the intake / exhaust passage controlled in the retard direction;
The control valve includes a cylindrical valve body, and a spool valve slidably accommodated in the cylindrical interior of the valve body,
The valve body has an opening facing the other end of the supply passage connected at one end to the hydraulic pressure source, and an opening facing the other end of the intake / exhaust passage connected at the one end to the valve timing changing device. Each of the openings is formed so as to face a circumferential groove formed on the outer periphery of the body of the valve body,
Wherein each circumferential groove of each intake passage side, the peripheral outer peripheral side entire circumference of the groove has covered the filter body, and the control from the valve timing change apparatus through the respective intake passages including the respective openings A hydraulic apparatus comprising a substantially cylindrical filter that applies resistance to hydraulic oil discharged into a valve body of the valve to attenuate pulse pressure .
油圧源と、
この油圧源から供給される作動油によって吸気弁または排気弁の開閉タイミングを進角方向または遅角方向に制御するバルブタイミング変更装置と、
前記油圧源とバルブタイミング変更装置との間に配置され、油圧源からバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路への作動油の供給及びバルブタイミング変更装置の進角方向に制御される吸排通路若しくは遅角方向に制御される吸排通路からの作動油の排出を制御する制御弁とを備え、
前記制御弁は、筒状のバルブボディと、該バルブボディの筒状内部に摺動自在に収容されたスプール弁とを備え、
前記バルブボディには、前記油圧源に一端が接続された供給通路の他端が臨む開口部と、前記バルブタイミング変更装置に各一端が接続された前記各吸排通路の他端が臨む開口部がそれぞれ形成されていると共に、該各開口部はバルブボディの胴部外周に形成された周溝に臨んでそれぞれ開口形成され、
前記供給通路側の周溝内と前記各吸排通路側の前記各周溝内に、前記各開口部を含む各周溝の外周側全周を濾過体が覆うほぼ円筒状のフィルタをそれぞれ設け 前記各吸排通路側の前記各周溝内に設けられたフィルタは、前記バルブタイミング変更装置から前記各吸排通路を通って前記制御弁のバルブボディ内に排出される作動油に抵抗を与えて脈圧を減衰させることを特徴とする油圧装置。
A hydraulic source;
A valve timing changing device that controls the opening / closing timing of the intake valve or the exhaust valve in the advance direction or the retard direction by the hydraulic oil supplied from the hydraulic source;
Supply of hydraulic oil and valve from the hydraulic source to the intake / exhaust passage controlled in the advance direction of the valve timing change device or the intake / exhaust passage controlled in the retard direction of the valve timing change device, arranged between the hydraulic source and the valve timing change device A control valve for controlling the discharge of hydraulic oil from the intake / exhaust passage controlled in the advance direction of the timing changing device or the intake / exhaust passage controlled in the retard direction;
The control valve includes a cylindrical valve body, and a spool valve slidably accommodated in the cylindrical interior of the valve body,
The valve body has an opening facing the other end of the supply passage connected at one end to the hydraulic pressure source, and an opening facing the other end of the intake / exhaust passage connected at the one end to the valve timing changing device. Each of the openings is formed so as to face a circumferential groove formed on the outer periphery of the body of the valve body,
A substantially cylindrical filter is provided in the circumferential groove on the supply passage side and in the circumferential groove on the intake / exhaust passage side, respectively, with a filter body covering the entire outer circumference of each circumferential groove including the openings . A filter provided in each circumferential groove on each intake / exhaust passage side applies resistance to the hydraulic oil discharged from the valve timing changing device through the intake / exhaust passage into the valve body of the control valve. A hydraulic device characterized by attenuating pressure .
前記フィルタは、一端側にフック部が形成され、他端側にフック係止部が形成されており、フック係止部にフック部を係止することによってバルブボディに取付けられていることを特徴とする請求項1または2に記載の油圧装置。  The filter has a hook portion formed on one end side and a hook engaging portion formed on the other end side, and is attached to the valve body by engaging the hook portion with the hook engaging portion. The hydraulic device according to claim 1 or 2. 前記フィルタは、濾過体と、この濾過体の外周側に設けられた枠体とから形成されていることを特徴とする請求項1〜3のいずれかに記載の油圧装置。  The said filter is formed from the filter body and the frame provided in the outer peripheral side of this filter body, The hydraulic device in any one of Claims 1-3 characterized by the above-mentioned.
JP16358499A 1999-06-10 1999-06-10 Hydraulic device Expired - Lifetime JP3897482B2 (en)

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JP16358499A JP3897482B2 (en) 1999-06-10 1999-06-10 Hydraulic device
US09/577,620 US6382148B1 (en) 1999-06-10 2000-05-25 Oil pressure control apparatus for an internal combustion engine
DE2000127080 DE10027080C2 (en) 1999-06-10 2000-05-31 Oil pressure control device for an internal combustion engine
DE20023304U DE20023304U1 (en) 1999-06-10 2000-05-31 Solenoid valve for hydraulic valve actuator for IC engine, has filters filled into ports formed in valve accommodation hole
US09/986,782 US6622673B2 (en) 1999-06-10 2001-11-09 Oil pressure control apparatus for an internal combustion engine
US10/665,499 US6848404B2 (en) 1999-06-10 2003-09-22 Oil pressure control apparatus for an internal combustion engine
US11/020,248 US7281506B2 (en) 1999-06-10 2004-12-27 Oil pressure control apparatus for an internal combustion engine
US11/841,031 US20070295413A1 (en) 1999-06-10 2007-08-20 Oil pressure control apparatus for an internal combustion engine

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Publication number Priority date Publication date Assignee Title
CN104415608A (en) * 2013-08-30 2015-03-18 三多乐精密注塑(深圳)有限公司 Filter net and connecting method thereof

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JP2005036912A (en) * 2003-07-16 2005-02-10 Denso Corp Hydraulic control device
DE502005003893D1 (en) * 2004-07-30 2008-06-12 Schaeffler Kg Ring filter for annular grooves
JP6504396B2 (en) * 2015-06-12 2019-04-24 日立オートモティブシステムズ株式会社 Hydraulic control valve and valve timing control device for internal combustion engine
CN109458364B (en) * 2018-12-13 2020-06-30 恒天九五重工有限公司 A portable hydraulic pump station for debugging

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Publication number Priority date Publication date Assignee Title
CN104415608A (en) * 2013-08-30 2015-03-18 三多乐精密注塑(深圳)有限公司 Filter net and connecting method thereof
CN104415608B (en) * 2013-08-30 2017-02-08 三多乐精密注塑(深圳)有限公司 Filter net and connecting method thereof

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