JP5990916B2 - Valve timing control device - Google Patents

Valve timing control device Download PDF

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JP5990916B2
JP5990916B2 JP2012021126A JP2012021126A JP5990916B2 JP 5990916 B2 JP5990916 B2 JP 5990916B2 JP 2012021126 A JP2012021126 A JP 2012021126A JP 2012021126 A JP2012021126 A JP 2012021126A JP 5990916 B2 JP5990916 B2 JP 5990916B2
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chamber
oil
oil passage
advance
lock
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JP2013160095A (en
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藤脇　賢二
賢二 藤脇
昌樹 小林
昌樹 小林
憲治 池田
憲治 池田
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-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
    • F01L1/344—Valve-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
    • F01L1/3442—Valve-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
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34466—Locking means between driving and driven members with multiple locking devices

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  • Valve Device For Special Equipments (AREA)

Description

本発明は、弁開閉時期制御装置に関し、詳しくは、内燃機関のクランクシャフトと同期回転する駆動側回転部材と、これと同軸上に配置され内燃機関の弁開閉用のカムシャフトと一体回転する従動側回転部材とが、夫々の相対回転位相が変更自在となるように備えられ、相対回転位相の変化を規制するロックピン等の出退部材を有した出退機構を制御する技術の改良に関する。   The present invention relates to a valve opening / closing timing control device, and more specifically, a drive-side rotating member that rotates synchronously with a crankshaft of an internal combustion engine, and a driven member that is arranged coaxially with this and rotates integrally with a valve shaft of an internal combustion engine. The present invention relates to an improvement in technology for controlling a retracting mechanism having a retracting member such as a lock pin that is provided with a side rotating member so that each relative rotating phase can be freely changed and restricts a change in the relative rotating phase.

上記のように構成された弁開閉時期制御装置として特許文献１には、駆動側回転部材（文献ではハウジング）の内部に従動側回転部材（文献ではベーンロータ）を相対回転自在に嵌め込んだ構成が示されている。この特許文献１では、駆動側回転部材に形成された複数の仕切壁の中間位置に従動側回転部材に形成された複数の羽根部を配置することで羽根部を挟む位置に進角室と遅角室とを形成し、羽根部の１つに出退機構（文献ではロック機構）を備えている。この出退機構は、羽根部に形成されたピン孔に進退自在に収容されたロックピンと、ハウジングのフロントカバーに形成されたロック孔と、ロックピンをロック孔の方向に付勢するスプリングとで構成されている。   As a valve opening / closing timing control device configured as described above, Patent Document 1 has a configuration in which a driven-side rotating member (vane rotor in the document) is fitted in a relatively rotatable manner inside a driving-side rotating member (housing in the document). It is shown. In Patent Document 1, a plurality of blade portions formed on a driven side rotation member are arranged at intermediate positions of a plurality of partition walls formed on a drive side rotation member, so that an advance chamber and a delay are positioned at positions sandwiching the blade portions. A corner chamber is formed, and one of the blades is provided with a retracting mechanism (in the literature, a locking mechanism). The retracting mechanism includes a lock pin that is housed in a pin hole formed in the blade portion so as to freely advance and retract, a lock hole formed in the front cover of the housing, and a spring that urges the lock pin in the direction of the lock hole. It is configured.

この特許文献１では、ロックピンの先端部分に進角室からの作動油を供給することによりロックピンのロックを解除する解除油路と、ロックピンの内端部に形成された大径部に遅角室からの作動油を供給することによりロックピンのロックを解除する解除油路とが示されている。   In Patent Document 1, a release oil passage that releases lock of the lock pin by supplying hydraulic oil from the advance chamber to the tip portion of the lock pin, and a large-diameter portion formed at the inner end of the lock pin. A release oil passage for unlocking the lock pin by supplying hydraulic oil from the retard chamber is shown.

また、弁開閉時期制御装置として特許文献２には、相対回転位相を中間回転位相に保持する出退機構（文献では保持機構）が備えられている。この出退機構は従動側回転部材（文献ではベーンロータ）の２つベーン各々に設けられたロックピン（第１ロックピンと第２ロックピン）と、駆動側回転部材（文献ではハウジング）に連結するスプロケット本体に形成された係合溝（文献では第１係合溝と第２係合溝）と、ロックピンを係合方向に付勢するスプリング（文献では第１スプリングと第２スプリング）とを備えている。   Further, as a valve opening / closing timing control device, Patent Document 2 is provided with a retracting mechanism (holding mechanism in the literature) that maintains the relative rotational phase at the intermediate rotational phase. This retracting mechanism includes a lock pin (first lock pin and second lock pin) provided on each of the two vanes of the driven side rotating member (in the literature, vane rotor) and a sprocket connected to the driving side rotating member (in the literature, housing). An engagement groove (first engagement groove and second engagement groove in the literature) formed in the main body and a spring (first spring and second spring in the literature) that urges the lock pin in the engagement direction are provided. ing.

この特許文献２では、ロックピンを収容する空間に対して、作動油の油圧をロックピンに対して係合方向（ロック方向）に付勢する押込用受圧室と、ロックピンを係合の解除方向（ロック解除方向）に作用させる解除用油圧室とが形成されている。この押込用受圧室と、解除用受圧室と、進角室と、遅角室とに対してオイルポンプからの作動油を制御して供給する第１電磁切換弁と第２電磁切換弁とを備えている。   In Patent Document 2, the pressure receiving chamber for pushing the hydraulic oil hydraulic pressure in the engagement direction (lock direction) with respect to the lock pin with respect to the space in which the lock pin is accommodated, and the lock pin are disengaged. A release hydraulic chamber that acts in a direction (unlock direction) is formed. A first electromagnetic switching valve and a second electromagnetic switching valve that control and supply hydraulic oil from the oil pump to the pushing pressure receiving chamber, the release pressure receiving chamber, the advance chamber, and the retard chamber. I have.

このような構成から、第１電磁切換弁と第２電磁切換弁とを制御することでエンジンの始動時には解除用油圧室に作動油を供給してロック解除を行い、相対回転位相を遅角方向に変化させる。また、エンジンを停止させる際には押込用受圧室に作動油を供給してロック状態にするように制御形態が設定されている。   With such a configuration, by controlling the first electromagnetic switching valve and the second electromagnetic switching valve, when the engine is started, hydraulic oil is supplied to the release hydraulic chamber to release the lock, and the relative rotation phase is retarded. To change. Further, when the engine is stopped, the control mode is set so that hydraulic oil is supplied to the pressure-receiving chamber for pushing and the locked state is obtained.

つまり、弁開閉時期制御装置では、特許文献１や特許文献２にも示されるようにエンジンの始動時には出退機構により駆動側回転部材と従動側回転部材との相対回転位相を、エンジンの始動に適した位相に維持する。   That is, in the valve opening / closing timing control device, as shown in Patent Document 1 and Patent Document 2, when the engine is started, the relative rotation phase between the driving side rotating member and the driven side rotating member is set to start the engine by the retracting mechanism. Maintain a suitable phase.

また、特許文献２に記載される構成では、油圧により出退機構を構成する２つのロックピンを所定の順序で抜き方向に作動させてロック解除を行い、油圧の作用によりロックピンをロック方向に作動させることでロック状態に移行させるものである。   Further, in the configuration described in Patent Document 2, two lock pins constituting the retracting mechanism are operated by hydraulic pressure in the pulling direction in a predetermined order to release the lock, and the lock pin is locked in the locking direction by the action of hydraulic pressure. It is shifted to the locked state by operating.

特開２００３‐３２８７０８号公報JP 2003-328708 A 特開２００９‐２９９６４３号公報JP 2009-299643 A

例えば、遅角室とロックピンとの間にロック解除用の油路を形成し、遅角室からの作動油の圧力をロックピンに対してロック解除方向に作用させ、嵌合用の凹部から引き抜く構成では次のような不都合を招くこともあった。つまり、遅角室への作動油の供給により遅角室の油圧が上昇してロックピンを凹部から引き抜いた後（ロック解除後）に、相対回転位相が遅角方向に変化し始めた際に遅角室の容積拡大に伴い遅角室の圧力が低下し、ロックピンが再び凹部に嵌合してロック位置に戻ることがあった。特に、凹部が長孔状（回転方向に長い長孔状）に形成される構成では、遅角室の容積拡大に伴う圧力低下により、ロックピンが容易に凹部に嵌り込みロック位置に戻るだけではなく、ロックピンが凹部の開口縁に接触して円滑な相対回転が損なわれることがあった。   For example, an oil passage for unlocking is formed between the retarding chamber and the lock pin, and the hydraulic oil pressure from the retarding chamber is applied to the lock pin in the unlocking direction and pulled out from the recess for fitting. Then, the following inconvenience might be caused. That is, when the hydraulic pressure in the retard chamber increases due to the supply of hydraulic oil to the retard chamber and the lock pin is pulled out of the recess (after unlocking), the relative rotation phase begins to change in the retard direction. As the volume of the retard chamber is increased, the pressure in the retard chamber is reduced, and the lock pin may be fitted into the recess again to return to the lock position. In particular, in a configuration in which the recess is formed in a long hole shape (long hole shape long in the rotation direction), the lock pin easily fits into the recess and returns to the lock position due to the pressure drop accompanying the volume expansion of the retard chamber. In some cases, the lock pin contacts the opening edge of the recess and smooth relative rotation is impaired.

更に、前述したものと同様に遅角室とロックピンとの間にロック解除用の油路を形成した構成において、遅角室への作動油の供給で相対回転位相を変化させる際には、ロックピンをロック解除位置に保持する制御も行われる。このように相対回転位相を変化させる場合において、遅角室の圧力が低下した場合にはロックピンの先端が相対回転する部材に接触して円滑な相対回転が損なわれることもあった。このような不都合は進角室とロックピンとの間にロック解除油路を形成し、進角室からの作動油の油圧でロックピンのロックを解除を行う構成においても同様に発生するものであった。   Furthermore, in the configuration in which an oil passage for unlocking is formed between the retard chamber and the lock pin as described above, when changing the relative rotation phase by supplying hydraulic oil to the retard chamber, Control is also performed to hold the pin in the unlocked position. When the relative rotational phase is changed in this way, when the pressure in the retard chamber decreases, the tip of the lock pin may come into contact with the relative rotating member and the smooth relative rotation may be impaired. Such an inconvenience also occurs in a configuration in which a lock release oil passage is formed between the advance chamber and the lock pin, and the lock pin is unlocked by hydraulic oil pressure from the advance chamber. It was.

また、例えば、遅角室とロックピンとの間にロック油路を形成し、遅角室からの作動油をロックピンに対してロック方向に作用させロック用の凹部に嵌合させる構成では次のような不都合を招くこともあった。つまり、遅角室への作動油の供給により作動油の油圧が上昇してロックピンを凹部に嵌合させた後に、相対回転位相が遅角方向に変化し始めた際に遅角室の容積拡大に伴い遅角室の圧力が低下し、ロックピンが凹部から抜け出し（ロックが解除され）、ロック状態に移行できないことがあった。このような不都合は進角室とロックピンとの間にロック油路を形成し、進角室からの作動油の油圧でロックピンを凹部に嵌合させる構成においても同様に発生するものであった。   Further, for example, in the configuration in which a lock oil passage is formed between the retard chamber and the lock pin, and the hydraulic oil from the retard chamber acts on the lock pin in the lock direction and fits into the lock recess, the following is performed. Such inconvenience may be caused. That is, when the relative rotational phase starts to change in the retarding direction after the hydraulic pressure of the working oil is increased by the supply of the working oil to the retarding chamber and the lock pin is fitted in the recess, the volume of the retarding chamber is increased. With the expansion, the pressure in the retarded angle chamber was lowered, the lock pin was pulled out from the recess (the lock was released), and the lock state could not be transferred. Such an inconvenience also occurs in a configuration in which a lock oil passage is formed between the advance chamber and the lock pin, and the lock pin is fitted into the recess by the hydraulic oil pressure from the advance chamber. .

本発明の目的は、出退機構の出退部材の嵌合凹部からの解除と、出退部材の嵌合凹部への嵌合とを行う弁開閉時期制御装置を簡便に構成する点にある。   The objective of this invention exists in the point which comprises simply the valve opening / closing timing control apparatus which performs cancellation | release from the fitting recessed part of the withdrawing / withdrawing member of a withdrawal mechanism, and fitting to the fitting recessed part of a withdrawing / withdrawing member.

本発明の特徴は、内燃機関のクランクシャフトと同期回転する駆動側回転部材と、前記駆動側回転部材と同軸上に配置され前記内燃機関の弁開閉用のカムシャフトと一体回転する従動側回転部材とを備え、作動油の供給により前記駆動側回転部材と前記従動側回転部材と相対回転位相を遅角方向に変化させる遅角室と、作動油の供給により前記相対回転位相を進角方向に変化させる進角室とが形成され、前記相対回転位相が最遅角と最進角との間にある所定の中間位相において前記駆動側回転部材と前記従動側回転部材との一方の回転部材に出退自在に支持される出退部材と、他方の回転部材に形成され前記出退部材が嵌合する嵌合凹部と、前記出退部材を延出方向に付勢するスプリングとを備えて、少なくとも前記スプリングの付勢力により前記出退部材が前記嵌合凹部に嵌合することにより前記相対回転位相を前記中間位相に拘束または前記中間位相の範囲内にて規制する出退機構が構成されると共に、前記進角室または前記遅角室に単一の制御弁を介して前記作動油を供給する進角油路または遅角油路と、前記進角室と前記遅角室との一方の油室への作動油の供給時に前記出退部材を前記嵌合凹部から抜き出す方向に作動油を供給する解除油路と、前記進角室と前記遅角室との他方の油室への作動油の供給時に前記出退部材を前記嵌合凹部に嵌合させる方向に作動油を供給する作動油路とを備え、前記作動油路が前記制御弁の下流で前記進角油路または前記遅角油路から分岐して前記遅角室および前記進角室を経由しない独立した油路として形成されている点にある。 The present invention is characterized in that a driving side rotating member that rotates in synchronization with a crankshaft of an internal combustion engine, and a driven side rotating member that is arranged coaxially with the driving side rotating member and rotates integrally with a camshaft for opening and closing the valve of the internal combustion engine. A retarding chamber that changes the relative rotational phase of the driving-side rotating member and the driven-side rotating member in the retarding direction by supplying hydraulic oil, and the relative rotational phase in the advanced direction by supplying hydraulic oil. An advancing chamber to be changed, and at a predetermined intermediate phase in which the relative rotational phase is between the most retarded angle and the most advanced angle, one rotating member of the driving side rotating member and the driven side rotating member A retractable member that is supported so as to be freely retractable, a fitting recess that is formed on the other rotating member and engages with the retractable member, and a spring that biases the retractable member in the extending direction , At least by the biasing force of the spring With projecting and retracting mechanism for restricting by said advancing and retracting member is within the range of said the relative rotational phase by fitting the fitting recess intermediate phase constraint or the intermediate phase is formed, the advance chamber or An advance oil passage or a retard oil passage for supplying the operation oil to the retard chamber via a single control valve, and the hydraulic oil to one oil chamber of the advance chamber and the retard chamber. A release oil passage that supplies hydraulic oil in a direction in which the withdrawal / retraction member is extracted from the fitting recess during supply, and the withdrawal / retraction when hydraulic oil is supplied to the other oil chamber of the advance chamber and the retard chamber. the members and a hydraulic oil path for supplying hydraulic oil in the direction of fitting into the fitting recess, before Symbol operating oil passage is branched from the advance angle oil passage or the retard angle oil passage downstream of said control valve Thus, it is formed as an independent oil passage that does not pass through the retard chamber and the advance chamber .

この構成によると、出退部材の嵌合凹部から抜き出す作動を行う際には、一方の油室に供給される作動油が解除油路に供給され、この作動油の油圧により出退部材を嵌合凹部から抜き出す作動が実現する。これとは逆に、出退部材を嵌合凹部に挿入する際には、他方の油室に供給される作動油を作動油路に供給し、この作動油の油圧により出退部材を嵌合凹部の方向に作動させることで出退部材の嵌合凹部への嵌合が実現する。また、作動油路が制御弁の下流で進角油路または遅角油路から分岐して遅角室または進角室を経由しない独立した油路として形成されているので、出退部材の嵌合凹部からの抜き出し又は嵌合凹部への嵌合を迅速に行える。
この構成では遅角室と進角室との一方に作動油が供給される際に、その作動油の一部が解除油路に供給され、遅角室と進角室との他方に作動油が供給される際に、その作動油の一部が作動油路に供給されるので、遅角室と進角室とを選択して作動油を供給するための単一の制御弁を備えるだけで済み、油路構成が単純となる。
従って、出退機構の出退部材の嵌合凹部からの解除と、出退部材の嵌合凹部への嵌合とを行う開閉時期制御装置が簡便に構成された。 According to this configuration, when performing the operation of extracting from the fitting recess of the withdrawal / retraction member, the hydraulic oil supplied to one oil chamber is supplied to the release oil passage, and the withdrawal / retraction member is fitted by the hydraulic pressure of the hydraulic oil. The operation of extracting from the mating recess is realized. On the contrary, when inserting the retracting member into the fitting recess, the operating oil supplied to the other oil chamber is supplied to the operating oil passage, and the retracting member is engaged by the hydraulic pressure of this operating oil. By operating in the direction of the recess, the fitting of the retractable member into the fitting recess is realized. Further, since the work Doyuro is formed as an oil passage independent without going through the retarding chamber or the advance chamber branched from the advance angle oil passage or the retard angle oil passage downstream of the control valve, the advancing and retracting member Extraction from the fitting recess or fitting into the fitting recess can be performed quickly.
In this configuration, when hydraulic oil is supplied to one of the retard chamber and the advance chamber, a part of the hydraulic oil is supplied to the release oil passage, and the hydraulic oil is supplied to the other of the retard chamber and the advance chamber. Since a part of the hydraulic oil is supplied to the hydraulic oil passage when the oil is supplied, only a single control valve for supplying the hydraulic oil by selecting the retard chamber and the advance chamber is provided. The oil path configuration is simple.
Therefore, an opening / closing timing control device that releases the retracting member of the retracting mechanism from the fitting recess and fits the retracting member into the fitting recess is simply configured.

本発明は、前記進角室に作動油を供給する前記進角油路と、前記遅角室に作動油を供給する前記遅角油路とが、前記従動側回転部材に形成されると共に、前記解除油路が、前記従動側回転部材の内部において前記進角油路又は前記遅角油路から分岐して形成されても良い。 The present invention includes: the advance angle oil passage for supplying hydraulic fluid to the advance chamber, and the retard angle oil passage for supplying hydraulic fluid to the retard chamber is formed in a said driven side rotating member, The release oil passage may be formed by branching from the advance oil passage or the retard oil passage in the driven side rotation member.

これによると、進角油路から分岐により形成された油路では進角室の作動油の圧力が上昇する以前に分岐された解除油路に供給される作動油の油圧を上昇させることが可能となり、出退部材の抜き出し方向への作動を迅速に行える。   According to this, in the oil passage formed by branching from the advance oil passage, the hydraulic oil pressure supplied to the release oil passage branched before the hydraulic oil pressure in the advance chamber rises can be increased. Thus, the operation in the direction of extracting the retractable member can be performed quickly.

本発明は、前記進角室に作動油を供給する前記進角油路と、前記遅角室に作動油を供給する前記遅角油路とが、前記従動側回転部材に形成されると共に、前記作動油路が、前記従動側回転部材の内部において前記進角油路又は前記遅角油路から分岐して形成されても良い。 The present invention includes: the advance angle oil passage for supplying hydraulic fluid to the advance chamber, and the retard angle oil passage for supplying hydraulic fluid to the retard chamber is formed in a said driven side rotating member, The hydraulic oil passage may be formed by branching from the advance oil passage or the retard oil passage in the driven side rotation member.

これによると、例えば、進角油路から分岐して作動油路を形成した構成では進角室の作動油の圧力が上昇する以前に分岐された作動油路に供給される作動油の油圧を上昇させることが可能となり、相対回転位相を進角方向に変化させた場合に出退部材の挿入方向への作動を迅速に行える。遅角油路から分岐して作動油路を形成した構成では、前述した構成と同様に、相対回転位相を進角方向に変化させる場合に出退部材の挿入方向への作動を迅速に行える。   According to this, for example, in the configuration in which the hydraulic oil passage is formed by branching from the advance oil passage, the hydraulic oil pressure supplied to the branched hydraulic oil passage before the hydraulic oil pressure in the advance chamber rises is increased. When the relative rotational phase is changed in the advance angle direction, the operation in the insertion direction of the retractable member can be quickly performed. In the configuration in which the hydraulic oil passage is formed by branching from the retarded oil passage, the operation in the inserting / retracting member insertion direction can be performed quickly when the relative rotational phase is changed in the advance direction, as in the above-described configuration.

本発明は、前記出退部材を引退方向に作動油の油圧を作用させる第１受圧面と第２受圧面とが前記出退部材に形成され、前記進角室と前記遅角室との一方の油室からの作動油の油圧を前記第１受圧面に作用させる連通解除油路が形成され、前記進角室と前記遅角室との一方の油室に作動油を供給する油路から分岐した作動油の油圧を前記第２受圧面に作用させる前記解除油路が形成されても良い。   According to the present invention, a first pressure receiving surface and a second pressure receiving surface that cause the hydraulic pressure of hydraulic oil to act on the retracting member in the retracting direction are formed on the retracting member, and one of the advance chamber and the retard chamber A communication release oil passage is formed for applying hydraulic pressure of the hydraulic oil from the oil chamber to the first pressure receiving surface, and the hydraulic oil is supplied from one of the advance chamber and the retard chamber to the hydraulic chamber. The release oil passage for allowing the hydraulic pressure of the branched hydraulic oil to act on the second pressure receiving surface may be formed.

これによると、第１受圧面に連通解除油路からの作動油を供給して出退部材に対して引退方向に油圧を作用させ、第２受圧面に独立解除油路からの作動油を供給して出退部材に引退方向に油圧を作用させることが可能となる。そして、第１受圧面に作用する油圧と第２受圧面に作用する油圧とで出退部材を嵌合凹部から抜き出してロック解除を行える。   According to this, the hydraulic oil from the communication release oil passage is supplied to the first pressure receiving surface, the hydraulic pressure is applied to the retracting member in the retracting direction, and the hydraulic oil from the independent release oil passage is supplied to the second pressure receiving surface. Thus, the hydraulic pressure can be applied to the retracting member in the retracting direction. Then, the lock can be released by extracting the retracting member from the fitting recess with the hydraulic pressure acting on the first pressure receiving surface and the hydraulic pressure acting on the second pressure receiving surface.

第１実施形態の弁開閉時期制御装置の縦断側面図である。It is a vertical side view of the valve timing control apparatus of 1st Embodiment. 図１のII−II線断面図である。It is the II-II sectional view taken on the line of FIG. 第１実施形態のロック解除作動を連続的に示す断面図である。It is sectional drawing which shows continuously the lock release operation | movement of 1st Embodiment. 第１実施形態のロック作動を示す断面図である。It is sectional drawing which shows the lock action of 1st Embodiment. 第１実施形態の変形例（ａ）のロック作動油路を示す断側面図である。It is a cutaway side view showing the lock hydraulic fluid way of modification (a) of a 1st embodiment. 第２実施形態の弁開閉時期制御装置の縦断側面図である。It is a vertical side view of the valve timing control apparatus of 2nd Embodiment. 第２実施形態の弁開閉時期制御装置の縦断正面図である。It is a vertical front view of the valve timing control apparatus of 2nd Embodiment. 第２実施形態の規制機構及び拘束機構の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the control mechanism and restraint mechanism of 2nd Embodiment. 第２実施形態の内部ロータの斜視図である。It is a perspective view of the internal rotor of 2nd Embodiment. 第２実施形態の第３状態を示す平面図である。It is a top view which shows the 3rd state of 2nd Embodiment. 第２実施形態の第３状態を示す断面図である。It is sectional drawing which shows the 3rd state of 2nd Embodiment. 第２実施形態の第３状態から第２状態への移行を示す平面図である。It is a top view which shows transfer to the 2nd state from the 3rd state of 2nd Embodiment. 第２実施形態の第３状態から第２状態への移行を示す断面図である。It is sectional drawing which shows the transition from the 3rd state of 2nd Embodiment to a 2nd state. 第２実施形態の第２状態から第１状態への移行を示す平面図である。It is a top view showing change from the 2nd state of the 2nd embodiment to the 1st state. 第２実施形態の第２状態から第１状態への移行を示す断面図である。It is sectional drawing which shows transfer to the 1st state from the 2nd state of 2nd Embodiment. 第２実施形態の第１状態を示す平面図である。It is a top view which shows the 1st state of 2nd Embodiment. 第２実施形態の第１状態を示す断面図である。It is sectional drawing which shows the 1st state of 2nd Embodiment. 第２実施形態の通常運転時における進角制御を示す平面図である。It is a top view which shows advance angle control at the time of the normal driving | operation of 2nd Embodiment. 第２実施形態の通常運転時における進角制御を示す断面図である。It is sectional drawing which shows the advance angle control at the time of the normal driving | operation of 2nd Embodiment. 第２実施形態の通常運転時における遅角制御を示す平面図である。It is a top view which shows retard angle control at the time of the normal driving | operation of 2nd Embodiment. 第２実施形態の通常運転時における遅角制御を示す断面図である。It is sectional drawing which shows retard angle control at the time of normal driving | operation of 2nd Embodiment. 第２実施形態の第１状態から第２状態への移行を示す平面図である。It is a top view which shows transfer to the 2nd state from the 1st state of 2nd Embodiment. 第２実施形態の第１状態から第２状態への移行を示す断面図である。It is sectional drawing which shows the transfer from the 1st state of 2nd Embodiment to a 2nd state. 第２実施形態の第２状態から第３状態への移行を示す平面図である。It is a top view which shows transfer to the 3rd state from the 2nd state of 2nd Embodiment. 第２実施形態の第２状態から第３状態への移行を示す断面図である。It is sectional drawing which shows transfer to the 3rd state from the 2nd state of 2nd Embodiment.

以下、本発明の実施形態を図面に基づいて説明する。
〔第１実施形態の基本構成〕
図１及び図２に示すように、内燃機関としてのエンジン１００のクランクシャフト１０１とタイミングチェーン１０２を介して同期回転する駆動側回転部材としての外部ロータ１０を備え、エンジン１００の燃焼室の吸気弁又は排気弁を開閉するためのカムシャフト１と同軸で一体回転する従動側回転部材としての内部ロータ２０を備え、外部ロータ１０と内部ロータ２０との回転位相を制御する油圧制御系を備えて弁開閉時期制御装置が構成されている。特に、この第１実施形態では、進角室Ｒ１に作動油を供給する際に、ロックピン３１（出退部材の一例）に対して独立解除油路３６（解除油路の一例）からの作動油を直接的（進角室Ｒ１を介さず）に供給することによりロックピン３１のロック解除を行う構成に特徴を有する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration of the first embodiment]
As shown in FIGS. 1 and 2, the engine 100 as an internal combustion engine is provided with an external rotor 10 as a drive side rotation member that rotates synchronously via a crankshaft 101 and a timing chain 102, and an intake valve in a combustion chamber of the engine 100 Alternatively, the valve is provided with an internal rotor 20 as a driven side rotation member that rotates coaxially and integrally with the camshaft 1 for opening and closing the exhaust valve, and a hydraulic control system that controls the rotational phase between the external rotor 10 and the internal rotor 20. An opening / closing timing control device is configured. In particular, in the first embodiment, when the hydraulic oil is supplied to the advance chamber R1, the operation from the independent release oil passage 36 (an example of the release oil passage) with respect to the lock pin 31 (an example of the retracting member). It is characterized in that the lock pin 31 is unlocked by supplying oil directly (not through the advance chamber R1).

この弁開閉時期制御装置は、外部ロータ１０と内部ロータ２０とがカムシャフト１の回転軸芯Ｘと同軸芯で相対回転自在に配置され、作動油の給排により外部ロータ１０と内部ロータ２０との相対回転位相を変化させ、カムシャフト１の回転により開閉制御される弁（吸気弁又は排気弁）の開閉時期（タイミング）の変更を実現する。また、この弁開閉時期制御装置では、相対回転位相を最遅角でロックし（拘束し）、油圧によりロック解除が可能な出退機構としてロック機構Ｌを備えており、これらの構成を以下に説明する。   In this valve opening / closing timing control device, the external rotor 10 and the internal rotor 20 are arranged so as to be relatively rotatable with a rotation axis X of the camshaft 1 and coaxial with the rotation axis X. The relative rotation phase is changed, and the opening / closing timing (timing) of the valve (intake valve or exhaust valve) controlled to open / close by rotation of the camshaft 1 is realized. In addition, this valve opening / closing timing control device is provided with a lock mechanism L as a retracting mechanism that locks (restrains) the relative rotational phase at the most retarded angle and can be unlocked by hydraulic pressure. explain.

〔弁開閉時期制御装置の構成〕
弁開閉時期制御装置は、前述した外部ロータ１０と内部ロータ２０とを前部位置のフロントプレート２と、これと反対側（エンジン側）のリヤプレート３とで挟み込み、外部ロータ１０とフロントプレート２とリヤプレート３とを一体化するように連結ボルト４で連結して構成されている。 [Configuration of valve timing control device]
The valve opening / closing timing control device sandwiches the external rotor 10 and the internal rotor 20 described above between the front plate 2 at the front position and the rear plate 3 on the opposite side (engine side). And the rear plate 3 are connected by connecting bolts 4 so as to be integrated.

リヤプレート３の外周位置にはタイミングチェーン１０２が巻回するスプロケット３Ｓが一体的に形成され、フロントプレート２と内部ロータ２０との間には、内部ロータ２０を進角方向Ｓ１に付勢するトーションスプリング５が備えられている。内部ロータ２０をカムシャフト１に連結固定する固定ボルト６が、回転軸芯Ｘと同軸芯で配置され、この固定ボルト６の外周側に後述する進角油路２５の一部が形成されている。   A sprocket 3 </ b> S around which the timing chain 102 is wound is integrally formed at the outer peripheral position of the rear plate 3, and a torsion that urges the internal rotor 20 in the advance direction S <b> 1 between the front plate 2 and the internal rotor 20. A spring 5 is provided. A fixing bolt 6 for connecting and fixing the internal rotor 20 to the camshaft 1 is arranged coaxially with the rotary shaft X, and a part of an advance oil passage 25 to be described later is formed on the outer peripheral side of the fixing bolt 6. .

外部ロータ１０は円筒形の外殻部１１から内部に向けて複数の突出部１２が突設され、内部ロータ２０は円柱形の本体部分２１から外方に向けて複数の仕切突起２２が放射状に突設されている。また、外部ロータ１０の複数の突出部１２の中間に形成される油室（空間）に仕切突起２２を嵌め込むように外部ロータ１０と内部ロータ２０とが配置されている。   The outer rotor 10 has a plurality of projecting portions 12 projecting from the cylindrical outer shell portion 11 toward the inside, and the inner rotor 20 has a plurality of partition projections 22 radially outward from the columnar body portion 21. Projected. Further, the outer rotor 10 and the inner rotor 20 are arranged so that the partition protrusion 22 is fitted into an oil chamber (space) formed in the middle of the plurality of projecting portions 12 of the outer rotor 10.

このような構成から、複数の突出部１２の中間位置に形成される油室（空間）を仕切突起２２が仕切る形態となり、外部ロータ１０と内部ロータ２０とは、油室内で仕切突起２２が移動し得る角度だけ相対回転自在となる。外部ロータ１０は、前述したタイミングチェーン１０２により図２にＳ（回転方向Ｓ）で示す方向に回転駆動される。仕切突起２２を基準にして一方側には、作動油が供給されることにより相対回転位相が進角方向Ｓ１に変化させる進角室Ｒ１が形成される。仕切突起２２を基準にして他方側には、作動油が供給されることにより相対回転位相が遅角方向Ｓ２に変化させる遅角室Ｒ２が形成される。また、突出部１２の突出端には内部ロータ２０の本体部分２１の外周に接触する外部シール１３が備えられ、仕切突起２２の突出端には外部ロータ１０の外殻部１１の内面に接触する内部シール２３が備えられている。   With such a configuration, the partition protrusion 22 partitions the oil chamber (space) formed at the intermediate position between the plurality of protrusions 12, and the outer rotor 10 and the inner rotor 20 move the partition protrusion 22 in the oil chamber. Relative rotation is possible only by the possible angle. The external rotor 10 is rotationally driven in the direction indicated by S (rotational direction S) in FIG. On one side with respect to the partition protrusion 22, an advance chamber R <b> 1 is formed in which the relative rotation phase is changed in the advance direction S <b> 1 by supplying hydraulic oil. A retarding chamber R2 is formed on the other side with respect to the partitioning protrusion 22 to change the relative rotational phase in the retarding direction S2 by supplying hydraulic oil. The protruding end of the protruding portion 12 is provided with an external seal 13 that contacts the outer periphery of the main body portion 21 of the inner rotor 20, and the protruding end of the partition projection 22 contacts the inner surface of the outer shell portion 11 of the outer rotor 10. An internal seal 23 is provided.

相対回転位相が最遅角と最進角との間の中央近傍を中間位相と称しており、トーションスプリング５は、相対回転位相が最遅角にある状態から相対回転位相を中間位相に達するまで付勢力を作用させるように付勢力が作用する範囲が設定されている。尚、トーションスプリング５の付勢力が作用する範囲は中間位相を超えるものであっても良く、中間位相に達しないものであっても良い。   The middle of the relative rotational phase between the most retarded angle and the most advanced angle is referred to as an intermediate phase, and the torsion spring 5 starts from the state where the relative rotational phase is at the most retarded angle until the relative rotational phase reaches the intermediate phase. A range in which the urging force is applied is set so that the urging force is applied. The range in which the urging force of the torsion spring 5 acts may be beyond the intermediate phase or may not reach the intermediate phase.

この弁開閉時期制御装置には、進角室Ｒ１に連通する進角油路２５と、遅角室Ｒ２に連通する遅角油路２６とが形成されている。進角油路２５と遅角油路２６とはカムシャフト１の内部に連通しており、このカムシャフト１の外面のジョイントＪから電磁弁Ｖに接続している。エンジン１００で駆動される油圧ポンプＰからの作動油を電磁弁Ｖに供給する油路が形成されている。電磁弁Ｖは、進角油路２５と遅角油路２６との一方の油路を選択して作動油を供給し、他方の油路の排油を行う。電磁弁Ｖはエンジン１００の回転を制御するエンジンを制御するＥＣＵによって制御される。   In this valve opening / closing timing control device, an advance oil passage 25 communicating with the advance chamber R1 and a retard oil passage 26 communicating with the retard chamber R2 are formed. The advance oil passage 25 and the retard oil passage 26 communicate with the inside of the camshaft 1, and are connected to the solenoid valve V from the joint J on the outer surface of the camshaft 1. An oil passage for supplying hydraulic oil from the hydraulic pump P driven by the engine 100 to the electromagnetic valve V is formed. The solenoid valve V selects one of the advance oil passage 25 and the retard oil passage 26, supplies hydraulic oil, and drains the other oil passage. The solenoid valve V is controlled by an ECU that controls the engine that controls the rotation of the engine 100.

〔ロック機構〕
ロック機構Ｌは、内部ロータ２０に形成された複数の仕切突起２２の一つに対して、回転軸芯Ｘと平行姿勢の軸芯に沿って出退自在に備えた出退部材としてのロックピン３１と、このロックピン３１が嵌合するようにリヤプレート３に形成した嵌合凹部３２と、ロックピン３１を嵌合方向（延出方向）に付勢するロックスプリング３３とを備えて構成されている。 [Lock mechanism]
The lock mechanism L is a lock pin serving as a retractable member that can be retracted and retracted along an axis parallel to the rotational axis X with respect to one of the plurality of partition projections 22 formed on the internal rotor 20. 31, a fitting recess 32 formed in the rear plate 3 so that the lock pin 31 is fitted, and a lock spring 33 that urges the lock pin 31 in the fitting direction (extending direction). ing.

このロック機構Ｌは、相対回転位相を最遅角にロックする（拘束する）ため嵌合凹部３２の位置が設定され、このロック機構Ｌはエンジン１００の停止時に相対回転位相を最遅角にロックする。このように相対回転位相を最遅角にロックした状態でエンジン１００を始動する場合には吸排気時の負荷が軽減されるためセルモータに供給される電力も少なくて済む。このような理由から、例えば、アイドルストップ制御のようにエンジン１００の停止と起動とを頻繁に行う車両では、エンジン１００の停止時に相対回転位相を最遅角に設定する制御が行われる。   Since the lock mechanism L locks (restrains) the relative rotation phase at the most retarded angle, the position of the fitting recess 32 is set. The lock mechanism L locks the relative rotation phase at the most retarded angle when the engine 100 is stopped. To do. In this way, when the engine 100 is started with the relative rotational phase locked to the most retarded angle, the load during intake and exhaust is reduced, so that less power is supplied to the cell motor. For this reason, for example, in a vehicle that frequently stops and starts the engine 100, such as idle stop control, control for setting the relative rotation phase to the most retarded angle is performed when the engine 100 is stopped.

また、エンジン１００を停止させる際には、弁開閉時期制御装置の相対回転位相を最遅角に設定すると共に、油圧がアシストする状態でロック機構Ｌのロック操作を行う。次に、エンジン１００を始動する場合には、ＥＣＵが、クランキングを開始した後に、エンジン始動（点火によりエンジン１００が稼動する状態）に円滑に移行するためにロック機構Ｌのロックを解除して相対回転位相を進角方向Ｓ１に移行させる制御が行われる。このような要請から進角方向Ｓ１に変化させるために進角室Ｒ１に作動油が供給される際には、適切なタイミングでロックピン３１を嵌合凹部３２から抜き出す作動が行われる。   Further, when the engine 100 is stopped, the relative rotation phase of the valve opening / closing timing control device is set to the most retarded angle, and the locking operation of the lock mechanism L is performed in a state where the hydraulic pressure assists. Next, when the engine 100 is started, the ECU releases the lock of the lock mechanism L in order to smoothly shift to engine start (a state in which the engine 100 is operated by ignition) after starting cranking. Control for shifting the relative rotational phase in the advance direction S1 is performed. When hydraulic oil is supplied to the advance chamber R1 in order to change the advance direction S1 from such a request, an operation of extracting the lock pin 31 from the fitting recess 32 is performed at an appropriate timing.

図３に示すように、ロックピン３１は、先端側の嵌合部３１Ａと、これより大径となるピン本体３１Ｂとを一体形成し、ピン本体３１Ｂにロックスプリング３３を収容するスプリング空間３１Ｃが形成されている。これに対応して仕切突起２２においてロックピン３１を収容するために形成された収容孔部２８には、嵌合部３１Ａが挿通する第１孔部２８Ａと、ピン本体３１Ｂが挿通する第２孔部２８Ｂとが形成されている。   As shown in FIG. 3, the lock pin 31 has a fitting portion 31A on the distal end side and a pin main body 31B having a larger diameter than this, and a spring space 31C that houses the lock spring 33 in the pin main body 31B. Is formed. Correspondingly, a first hole portion 28A through which the fitting portion 31A is inserted and a second hole through which the pin body 31B is inserted into the accommodation hole portion 28 formed to accommodate the lock pin 31 in the partition projection 22. A portion 28B is formed.

嵌合部３１Ａの先端部分には第１受圧面Ｔ１が形成され、嵌合部３１Ａとピン本体３１Ｂとの境界部分にリング状の第２受圧面Ｔ２が形成され、ロックピン３１のロックスプリング３３が収容される空間側に付勢受圧面Ｑが形成されている。   A first pressure receiving surface T1 is formed at the distal end portion of the fitting portion 31A, and a ring-shaped second pressure receiving surface T2 is formed at a boundary portion between the fitting portion 31A and the pin body 31B, and a lock spring 33 of the lock pin 31 is formed. An urging pressure receiving surface Q is formed on the side of the space in which is stored.

嵌合凹部３２には、進角室Ｒ１からの作動油の油圧を第１受圧面にＴ１に作用させるための連通解除油路３５（解除油路の一例）が接続している。収容孔部２８には、第２受圧面Ｔ２に作動の圧力を作用させる独立解除油路３６（解除油路の一例）が接続している。前述したように進角油路２５がカムシャフト１の内部から内部ロータ２０に亘って形成されている。この進角油路２５の中間部分にロック解除側分岐部Ｄを形成し、このロック解除側分岐部Ｄで分岐した作動油が独立解除油路３６に供給される。つまり、独立解除油路３６は、進角室Ｒ１に作動油を供給する進角油路２５とは別個に形成された油路として構成されている。   Connected to the fitting recess 32 is a communication release oil passage 35 (an example of a release oil passage) for causing the hydraulic pressure of hydraulic oil from the advance chamber R1 to act on the first pressure receiving surface on T1. An independent release oil passage 36 (an example of a release oil passage) that applies an operating pressure to the second pressure receiving surface T <b> 2 is connected to the accommodation hole portion 28. As described above, the advance oil passage 25 is formed from the inside of the camshaft 1 to the internal rotor 20. A lock release side branch portion D is formed in an intermediate portion of the advance oil passage 25, and hydraulic oil branched by the lock release side branch portion D is supplied to the independent release oil passage 36. That is, the independent release oil passage 36 is configured as an oil passage that is formed separately from the advance oil passage 25 that supplies hydraulic oil to the advance chamber R1.

また、前述したように遅角油路２６がカムシャフト１の内部から内部ロータ２０に亘って形成され、この遅角油路２６の中間部分にロック作動側分岐部Ｅを形成し、このロック作動側分岐部Ｅで分岐した作動油がロック作動油路３７（作動油路の一例）に供給される。このロック作動油路３７は遅角室Ｒ２には直接的に接続しない独立した油路として形成されている。   Further, as described above, the retard oil passage 26 is formed from the inside of the camshaft 1 to the inner rotor 20, and a lock operation side branch portion E is formed in an intermediate portion of the retard oil passage 26, and this lock operation is performed. The hydraulic oil branched at the side branch portion E is supplied to the lock hydraulic oil passage 37 (an example of the hydraulic oil passage). The lock hydraulic oil passage 37 is formed as an independent oil passage that is not directly connected to the retard chamber R2.

エンジン１００の始動時のように低速回転状態で油圧ポンプＰから供給される作動油の油圧によってもロックピン３１を嵌合凹部３２から抜き出せるように、第１受圧面Ｔ１と第２受圧面Ｔ２とを併せた受圧面積の値が設定されている。つまり、エンジン１００が増速し油圧ポンプＰから供給される作動油の油圧が上昇した状況では第２受圧面Ｔ２に作用する作動油の油圧だけでもロックピン３１を嵌合凹部３２から抜き出せるように第２受圧面Ｔ２の受圧面積の値が設定されている。つまり、進角室Ｒ１に作動油の油圧が作用すると、第１受圧面Ｔ１及び第２受圧面Ｔ２に抜き出し方向（引退方向）に油圧が作用するが、第２受圧面Ｔ２だけに油圧が作用してもロックピン３１が嵌合凹部３２から抜け出せるように第２受圧面Ｔ２の受圧面積を設定してある。   The first pressure receiving surface T1 and the second pressure receiving surface T2 so that the lock pin 31 can be extracted from the fitting recess 32 also by the hydraulic pressure of the hydraulic oil supplied from the hydraulic pump P in the low speed rotation state when the engine 100 is started. And the pressure receiving area value is set. That is, in a situation where the speed of the engine 100 is increased and the hydraulic oil pressure supplied from the hydraulic pump P is increased, the lock pin 31 can be extracted from the fitting recess 32 only with the hydraulic oil pressure acting on the second pressure receiving surface T2. In addition, the value of the pressure receiving area of the second pressure receiving surface T2 is set. That is, when the hydraulic pressure of the hydraulic oil acts on the advance chamber R1, the hydraulic pressure acts on the first pressure receiving surface T1 and the second pressure receiving surface T2 in the extraction direction (retraction direction), but the hydraulic pressure acts only on the second pressure receiving surface T2. Even so, the pressure receiving area of the second pressure receiving surface T2 is set so that the lock pin 31 can come out of the fitting recess 32.

このロック機構Ｌでは、第１孔部２８Ａと嵌合部３１Ａとの間で作動油が多少リークしても、第２孔部２８Ｂとピン本体３１Ｂとの間で作動油のリークが抑制される精度を有していれば第１受圧面Ｔ１と第２受圧面Ｔ２とに作用する油圧によりロックピン３１の抜き出し（引退）が可能である。このような理由から、第２孔部２８Ｂとピン本体３１Ｂとの嵌合精度を高く設定し、第１孔部２８Ａの内径を嵌合部３１Ａの外径より設定値だけ大きく設定するように低い精度で加工されている。このような構成から、第２孔部２８Ｂの軸芯とピン本体３１Ｂとの軸芯とを高い精度で一致させるために高い精度での加工を行わずに済み、加工を容易にしている。   In the lock mechanism L, even if the hydraulic oil leaks somewhat between the first hole portion 28A and the fitting portion 31A, the hydraulic oil leak is suppressed between the second hole portion 28B and the pin body 31B. If it has accuracy, the lock pin 31 can be extracted (retracted) by the hydraulic pressure acting on the first pressure receiving surface T1 and the second pressure receiving surface T2. For this reason, the fitting accuracy between the second hole 28B and the pin body 31B is set high, and the inner diameter of the first hole 28A is set so as to be larger than the outer diameter of the fitting part 31A by a set value. Processed with precision. With such a configuration, since the axis of the second hole 28B and the axis of the pin main body 31B are made to coincide with each other with high accuracy, it is not necessary to perform processing with high accuracy, thereby facilitating the processing.

〔ロック機構の作動形態〕
この第１実施形態の構成から、エンジン１００を停止させる際には遅角油路２６から遅角室Ｒ２に作動油を供給することにより相対回転位相が遅角方向に変化する。このように遅角室Ｒ２に供給される作動油はロック作動側分岐部Ｅからロック作動油路３７に供給され、このロック作動油路３７から付勢受圧面Ｑに供給される。このように付勢受圧面Ｑに作動油の油圧が作用した場合にはロックスプリング３３の付勢力をアシストする形態で油圧を作用させることになり、例えば、相対回転位相が変動する状況であっても、相対回転位相が最遅角に達したタイミングでロックピン３１の嵌合部３１Ａを嵌合凹部３２に対して迅速に嵌合させる。 [Operating form of locking mechanism]
In the configuration of the first embodiment, when the engine 100 is stopped, the relative rotational phase changes in the retarding direction by supplying the working oil from the retarding oil passage 26 to the retarding chamber R2. Thus, the hydraulic oil supplied to the retard chamber R2 is supplied from the lock operation side branch portion E to the lock hydraulic oil passage 37, and is supplied from the lock hydraulic oil passage 37 to the biased pressure receiving surface Q. In this way, when the hydraulic pressure of the hydraulic oil acts on the bias pressure receiving surface Q, the hydraulic pressure is applied in a form that assists the biasing force of the lock spring 33. For example, the relative rotation phase varies. In addition, the fitting portion 31A of the lock pin 31 is quickly fitted into the fitting recess 32 at the timing when the relative rotation phase reaches the most retarded angle.

エンジン１００の始動時にロック機構Ｌのロック状態を解除して相対回転位相を進角方向Ｓ１に変化させる場合には、ＥＣＵが電磁弁Ｖを制御することにより進角油路２５から進角室Ｒ１に作動油が供給される。進角油路２５に供給された作動油はロック解除側分岐部Ｄから独立解除油路３６に送られ、この作動油の油圧が予圧として第２受圧面Ｔ２に作用する。前述したように第２受圧面Ｔ２に作用する油圧だけでもロックピン３１を嵌合凹部３２から抜くことができる。しかし、この直後に進角油路２５から第１受圧面Ｔ１に対して作動油の油圧が作用することで、図３（ｂ）の状態から図３（ｃ）の状態へとより迅速にロックピン３１の抜き出しが行われる（ロック機構Ｌのロックが解除される）。   When the locked state of the lock mechanism L is released and the relative rotation phase is changed to the advance angle direction S1 when the engine 100 is started, the ECU controls the solenoid valve V so that the advance angle chamber R1 is advanced from the advance oil path 25. Is supplied with hydraulic oil. The hydraulic oil supplied to the advance oil passage 25 is sent from the lock release side branch portion D to the independent release oil passage 36, and the hydraulic pressure of this hydraulic oil acts on the second pressure receiving surface T2 as a preload. As described above, the lock pin 31 can be removed from the fitting recess 32 only with the hydraulic pressure acting on the second pressure receiving surface T2. However, immediately after this, the hydraulic pressure of the hydraulic oil acts on the first pressure receiving surface T1 from the advance oil passage 25, so that the state shown in FIG. 3B can be more quickly locked to the state shown in FIG. The pin 31 is extracted (the lock mechanism L is unlocked).

つまり、独立解除油路３６には進角油路２５のロック解除側分岐部Ｄで分岐した作動油が供給されるので、独立解除油路３６から第２受圧面Ｔ２に供給される作動油の油圧は、進角室Ｒ１の圧力の影響を受けることが殆どなく、第２受圧面Ｔ２に作用する油圧を短時間のうちに上昇させるのである。   That is, since the hydraulic oil branched by the unlocking side branch portion D of the advance oil passage 25 is supplied to the independent release oil passage 36, the hydraulic oil supplied from the independent release oil passage 36 to the second pressure receiving surface T2 is supplied. The hydraulic pressure is hardly affected by the pressure in the advance chamber R1, and the hydraulic pressure acting on the second pressure receiving surface T2 is increased in a short time.

また、進角油路２５から供給される作動油が進角室Ｒ１に充満した後に連通解除油路３５に供給される作動油の油圧が上昇する。これにより、既に第２受圧面Ｔ２に作用している油圧によりロックピン３１を抜き出し方向に作動させ、更に、連通解除油路３５から第１受圧面Ｔ１に作用する油圧により迅速にロックピン３１を嵌合凹部３２から抜き出し、ロック機構Ｌのロックが解除される。   Further, the hydraulic pressure of the hydraulic oil supplied to the communication release oil passage 35 increases after the hydraulic oil supplied from the advance oil passage 25 fills the advance chamber R1. As a result, the lock pin 31 is operated in the extraction direction by the hydraulic pressure already acting on the second pressure receiving surface T2, and the lock pin 31 is quickly moved by the hydraulic pressure acting on the first pressure receiving surface T1 from the communication release oil passage 35. Withdrawing from the fitting recess 32, the lock mechanism L is unlocked.

〔第１実施形態の作用・効果〕
相対回転位相を最遅角に設定してロック機構Ｌをロック状態に設定する場合には、ロック作動油路３７からの作動油をロックピン３１に作用させることにより、迅速、確実にロック状態に移行できる。また、作動油が進角室Ｒ１に充満した直後にロック機構Ｌのロックが解除されるので、外部ロータ１０と内部ロータ２０とを相対回転させる力が低い状態でロック機構Ｌのロック解除が可能となり、例えば、強い剪断力の作用によりロックピン３１が抜き出し不能に陥ることがなく、ロック解除を確実に行える。前述した加工精度の設定により、第１孔部２８Ａと嵌合部３１Ａとが密嵌合していないので、ロックピン３１が嵌合凹部３２から抜き出される際には第１孔部２８Ａと嵌合部３１Ａとの間の摺動抵抗が小さく、迅速な抜き出しを実現する。 [Operations and effects of the first embodiment]
When the lock mechanism L is set to the locked state by setting the relative rotation phase to the most retarded angle, the operating oil from the lock operating oil passage 37 is applied to the lock pin 31 so that the lock state can be quickly and reliably set. Can be migrated. Further, since the lock mechanism L is unlocked immediately after the hydraulic oil fills the advance chamber R1, the lock mechanism L can be unlocked with a low force for rotating the external rotor 10 and the internal rotor 20 relatively. Thus, for example, the lock pin 31 does not fall out due to the action of a strong shearing force, and the lock can be reliably released. Since the first hole 28A and the fitting portion 31A are not closely fitted due to the setting of the processing accuracy described above, when the lock pin 31 is extracted from the fitting recess 32, the first hole 28A and the fitting portion 31A are fitted. The sliding resistance between the joint portion 31A is small, and quick extraction is realized.

更に、ロック機構Ｌのロックが解除される時点で進角室Ｒ１には作動油が既に充満しているため、外部ロータ１０と内部ロータ２０とが相対回転し難い状態にあり、カムシャフト１から作用する外力によって相対回転位相が乱れる不都合を招くこともない。そして、進角室Ｒ１に供給される作動油の油圧により相対回転位相が進角方向Ｓ１の方向に変化し、この進角方向Ｓ１への変化をトーションスプリング５の付勢力がサポートして一層迅速な変化が実現する。   Furthermore, since the advance chamber R1 is already filled with the hydraulic oil when the lock mechanism L is unlocked, the external rotor 10 and the internal rotor 20 are difficult to rotate relative to each other. There is no inconvenience that the relative rotational phase is disturbed by the applied external force. The relative rotation phase changes in the advance direction S1 due to the hydraulic pressure of the hydraulic oil supplied to the advance chamber R1, and the change in the advance direction S1 is supported by the urging force of the torsion spring 5 so as to be quicker. Change will be realized.

特に、本発明の弁開閉時期制御装置では、ロックピン３１の挿抜を制御するための専用の弁を必要としないので、油路系が単純化し、部品点数の増大も抑制して製造が容易でコストの低減も実現する。   In particular, the valve opening / closing timing control device of the present invention does not require a dedicated valve for controlling the insertion / extraction of the lock pin 31, so the oil passage system is simplified, and the increase in the number of parts is suppressed, and the manufacture is easy. Cost reduction is also realized.

因みに、この第１実施形態では、相対回転位相を必要とする位相に設定する場合には、ＥＣＵが電磁弁Ｖを制御することにより進角油路２５と遅角油路２６との一方を選択して作動油を供給する。ロック状態に移行する場合には、遅角油路２６にのみ作動油を供給する制御が行われ、相対回転位相が最遅角に達した時点でロックスプリング３３の付勢力によりロックピン３１の嵌合部３１Ａが嵌合凹部３２に嵌合してロック状態に達する。   Incidentally, in the first embodiment, when the relative rotational phase is set to a required phase, the ECU selects one of the advance oil passage 25 and the retard oil passage 26 by controlling the electromagnetic valve V. To supply hydraulic oil. When shifting to the locked state, control is performed to supply hydraulic oil only to the retard oil passage 26, and when the relative rotational phase reaches the most retarded angle, the lock pin 31 is fitted by the urging force of the lock spring 33. The joint portion 31A is fitted into the fitting recess 32 and reaches the locked state.

〔第１実施形態の変形例〕
（ａ）図５に示すように、前述した第１実施形態と同様に進角油路２５の中間部分のロック解除側分岐部Ｄで分岐した作動油の油圧を独立解除油路３６から第２受圧面Ｔ２に作用させる油路系を備えると共に、第１実施形態とは異なり、遅角室Ｒ２からの作動油を仕切突起２２に形成したロック作動油路３７から付勢受圧面Ｑに作用するように構成する。 [Modification of First Embodiment]
(A) As shown in FIG. 5, the hydraulic pressure of the hydraulic fluid branched at the unlocking side branching portion D at the intermediate portion of the advance oil passage 25 is changed from the independent release oil passage 36 to the second as in the first embodiment described above. In addition to the oil passage system that acts on the pressure receiving surface T2, unlike the first embodiment, the hydraulic oil from the retard chamber R2 acts on the biased pressure receiving surface Q from the lock hydraulic oil passage 37 formed on the partition projections 22. Configure as follows.

このように構成することにより、ロック機構Ｌのロック解除を必要とする場合には、独立解除油路３６からの作動油により迅速にロック解除を行うことになり、ロック機構Ｌによるロック状態に移行する場合には、遅角室Ｒ２に供給される作動油を付勢受圧面Ｑに供給し、この付勢受圧面Ｑに作用する油圧をロックピン３１に対してロック作動方向に作用させ、ロックスプリング３３の付勢力をアシストする形態で迅速なロック状態への移行が実現する。   With this configuration, when it is necessary to unlock the lock mechanism L, the lock is quickly released by hydraulic oil from the independent release oil passage 36, and the lock mechanism L shifts to the locked state. In this case, the hydraulic oil supplied to the retard chamber R2 is supplied to the urging pressure receiving surface Q, and the hydraulic pressure acting on the urging pressure receiving surface Q is applied to the lock pin 31 in the lock operating direction, A quick transition to the locked state is realized by assisting the urging force of the spring 33.

（ｂ）また、第１実施形態の変形例として、前述した変形例のロック作動油路３７を形成するものにおいて、独立解除油路３６に代えて進角室Ｒ１からの作動油の油圧を第２受圧面Ｔ２に対して直接的に作用させるロック解除油路を仕切突起２２に形成しても良い。 (B) Further, as a modified example of the first embodiment, in the case where the lock hydraulic fluid passage 37 of the above-described modified example is formed, the hydraulic pressure of the hydraulic fluid from the advance chamber R1 is changed in place of the independent release fluid passage 36. (2) An unlocking oil passage that directly acts on the pressure receiving surface T2 may be formed in the partition protrusion 22.

〔第２実施形態〕
この第２実施形態では、弁開閉時期制御装置の基本的な構成は第１実施形態と共通するものであるが、第１実施形態と比較して、外部ロータ１０と内部ロータ２０との相対回転位相が最遅角と最進角との中間となる中間位相においてロック機構Ｌによりロックする（拘束する）点が異なり、これに関連して油路構成が異なる。特に、この第２実施形態では、遅角室Ｒ２に作動油を供給する際に、第１ロック部材４５（出退部材の一例）に対して付勢油路８６（作動油路の一例）からの作動油を直接的（遅角室Ｒ２を介さず）に供給することにより第１ロック部材４５（出退部材の一例）を規制凹部５２に突入させ規制状態への移行を行う構成に特徴を有する。 [Second Embodiment]
In this second embodiment, the basic configuration of the valve timing control device is the same as that of the first embodiment, but the relative rotation between the external rotor 10 and the internal rotor 20 is compared with the first embodiment. The phase is locked (restrained) by the lock mechanism L in an intermediate phase in which the phase is intermediate between the most retarded angle and the most advanced angle, and the oil path configuration is different in this regard. In particular, in the second embodiment, when hydraulic fluid is supplied to the retarded angle chamber R2, from the urging oil passage 86 (an example of the hydraulic fluid passage) with respect to the first lock member 45 (an example of the retracting member). Is characterized in that the first lock member 45 (an example of a retracting member) enters the restricting recess 52 to directly enter the restricting state by supplying the hydraulic oil directly (without the retard chamber R2). Have.

〔第２実施形態の基本構成〕
図６〜図９に示すように、駆動側回転部材としての外部ロータ１０と、この外部ロータ１０に対して同軸上に配置され、カムシャフト１と同期回転する従動側回転部材としての内部ロータ２０とを備えて弁開閉時期制御装置が構成されている。 [Basic configuration of the second embodiment]
As shown in FIGS. 6 to 9, the external rotor 10 as a driving side rotating member and the internal rotor 20 as a driven side rotating member that is arranged coaxially with the external rotor 10 and rotates synchronously with the camshaft 1. The valve opening / closing timing control device is configured.

外部ロータ１０は、カムシャフト１が接続される側に取り付けられるリヤプレート３と、カムシャフト１が接続される側とは反対側に取り付けられるフロントプレート２と、リヤプレート３とフロントプレート２とで挟まれる外殻部１１とから構成される。外部ロータ１０に内装される内部ロータ２０は、カムシャフト１の先端部に一体的に組み付けられ、外部ロータ１０に対して一定の範囲内で相対回転が可能に構成されている。   The external rotor 10 includes a rear plate 3 attached to the side to which the camshaft 1 is connected, a front plate 2 attached to the side opposite to the side to which the camshaft 1 is connected, and the rear plate 3 and the front plate 2. It is comprised from the outer shell part 11 pinched | interposed. The internal rotor 20 housed in the external rotor 10 is integrally assembled at the tip of the camshaft 1 and is configured to be rotatable relative to the external rotor 10 within a certain range.

外部ロータ１０の外殻部１１には、径内方向に突出する複数の突出部１２が回転方向Ｓに沿って互いに離間する位置に形成され、突出部１２と内部ロータ２０とにより油室が形成されている。   In the outer shell portion 11 of the outer rotor 10, a plurality of projecting portions 12 projecting in the radially inward direction are formed at positions separated from each other along the rotational direction S, and an oil chamber is formed by the projecting portion 12 and the inner rotor 20. Has been.

各油室は、内部ロータ２０の一部をなす仕切突起２２又は内部ロータ２０に取り付けられるベーン２４によって、進角室Ｒ１と遅角室Ｒ２とに二分されている。仕切突起２２に形成された第１収容部５１と第２収容部６１には、それぞれ規制部材として機能する第１ロック部材４５と、拘束部材として機能する第２ロック部材４６が収容される。この第２実施形態ではロック機構Ｌが、規制機構５０と拘束機構６０とで構成されている。これらの構成については後述する。   Each oil chamber is divided into an advance chamber R <b> 1 and a retard chamber R <b> 2 by a partition projection 22 that forms a part of the inner rotor 20 or a vane 24 attached to the inner rotor 20. A first lock member 45 that functions as a restricting member and a second lock member 46 that functions as a restraining member are accommodated in the first accommodating portion 51 and the second accommodating portion 61 formed on the partition protrusion 22. In the second embodiment, the lock mechanism L includes a restriction mechanism 50 and a restraining mechanism 60. These configurations will be described later.

カムシャフト１及びリヤプレート３に形成された進角油路２５は、進角室Ｒ１に連通している。同様に、カムシャフト１及び内部ロータ２０に形成された遅角油路２６は、遅角室Ｒ２に連通している。   The advance oil passage 25 formed in the camshaft 1 and the rear plate 3 communicates with the advance chamber R1. Similarly, the retard oil passage 26 formed in the camshaft 1 and the internal rotor 20 communicates with the retard chamber R2.

外部ロータ１０と内部ロータ２０とが相対回転可能な一定の範囲は、油室の内部で仕切突起２２又はベーン２４が変化可能な範囲に対応する。進角室Ｒ１の容積が最大となる相対回転位相が最進角であり、遅角室Ｒ２の容積が最大となる相対回転位相が最進角である。   A certain range in which the outer rotor 10 and the inner rotor 20 can rotate relative to each other corresponds to a range in which the partition protrusion 22 or the vane 24 can change inside the oil chamber. The relative rotation phase at which the volume of the advance chamber R1 is maximum is the most advanced angle, and the relative rotation phase at which the volume of the retard chamber R2 is maximum is the most advanced angle.

電磁弁Ｖは、エンジンを制御するＥＣＵによって操作される。電磁弁Ｖは、進角油路２５への作動油の供給を許すと同時に遅角油路２６からの作動油の排出を許して相対回転位相を進角方向Ｓ１に変化させる進角ポジションＶｆに設定可能である。これと同様に電磁弁Ｖは、進角油路２５及び遅角油路２６への作動油の給排を阻止して位相回転位相を保持する保持ポジションＶｎと、遅角油路２６への作動油の供給を許すと同時に進角油路２５からの作動油の排出を許して相対回転位相を遅角方向Ｓ２に変化させる遅角ポジションＶｒとに設定可能に構成されている。この電磁弁Ｖは、ＥＣＵからの制御信号のない状態においては、進角ポジションＶｆに保持されるように構成されている。また、ＥＣＵが電磁弁Ｖを進角ポジションＶｆに設定する制御を進角制御と称し、電磁弁Ｖを遅角ポジションＶｒに設定する制御を遅角制御と称する。   The solenoid valve V is operated by an ECU that controls the engine. The solenoid valve V allows the hydraulic oil to be supplied to the advance oil passage 25 and at the same time allows the hydraulic oil to be discharged from the retard oil passage 26 to change the relative rotation phase to the advance angle S1. It can be set. Similarly, the solenoid valve V prevents the hydraulic oil from being supplied to and discharged from the advance oil passage 25 and the retard oil passage 26 and maintains the phase rotation phase, and the operation to the retard oil passage 26. At the same time as allowing oil to be supplied, it is possible to set the retard angle position Vr to permit the discharge of hydraulic oil from the advance angle oil passage 25 and change the relative rotational phase in the retard angle direction S2. This electromagnetic valve V is configured to be held at the advance position Vf in the absence of a control signal from the ECU. Control in which the ECU sets the electromagnetic valve V to the advance position Vf is referred to as advance control, and control for setting the solenoid valve V to the retard position Vr is referred to as retard control.

〔ロック機構Ｌ：規制機構〕
相対回転位相を最遅角位相から中間ロック位相までの範囲（以下、「規制範囲Ｆ」と称する）に規制する規制機構５０の構成について、図８、図９及び図１０〜図２４に基づき説明する。 [Lock mechanism L: Restriction mechanism]
The configuration of the restriction mechanism 50 that restricts the relative rotational phase to the range from the most retarded phase to the intermediate lock phase (hereinafter referred to as “restriction range F”) will be described with reference to FIGS. 8, 9, and 10 to 24. To do.

規制機構５０は、主に段付き円筒形の第１ロック部材４５と、第１ロック部材４５を収容する第１収容部５１と、第１ロック部材４５が突入可能となるようリヤプレート３の表面に形成された長孔形状の規制凹部５２（嵌合凹部の一例）とから構成される。   The regulation mechanism 50 includes a stepped cylindrical first lock member 45, a first housing portion 51 that houses the first lock member 45, and the surface of the rear plate 3 so that the first lock member 45 can enter. It is comprised from the long-hole-shaped control recessed part 52 (an example of a fitting recessed part) formed in this.

第１ロック部材４５は、径が異なる円筒を４段積み重ねた形状である。この４段の円筒をリヤプレート３の側から順に、第１段部４５ａ、第２段部４５ｂ、第３段部４５ｃ及び第４段部４５ｄと称する。第２段部４５ｂは第１段部４５ａよりも径が小さくなるよう構成され、それよりフロントプレート２の側では、第２段部４５ｂ、第３段部４５ｃ、第４段部４５ｄと順に径が大きくなるように構成されている。   The first lock member 45 has a shape in which four stages of cylinders having different diameters are stacked. The four-stage cylinders are referred to as a first step portion 45a, a second step portion 45b, a third step portion 45c, and a fourth step portion 45d in this order from the rear plate 3 side. The second step portion 45b is configured to have a smaller diameter than the first step portion 45a, and on the front plate 2 side, the second step portion 45b, the third step portion 45c, and the fourth step portion 45d are arranged in this order. Is configured to be large.

第１段部４５ａは規制凹部５２に突入可能に形成され、第１段部４５ａが規制凹部５２に突入している時は、後述の如く相対回転位相が規制範囲Ｆの範囲内に規制される。第４段部４５ｄには円筒形の凹部４５ｅが形成され、第１スプリング５３（ロックスプリングの一例）が収容される。この凹部４５ｅと、凹部４５ｅの外周位置における第１ロック部材４５の端面（図８では上面）で付勢受圧面Ｑが形成されている。   The first step portion 45a is formed so as to be able to enter the restriction recess 52, and when the first step portion 45a enters the restriction recess 52, the relative rotational phase is restricted within the restriction range F as described later. . A cylindrical recess 45e is formed in the fourth step 45d, and the first spring 53 (an example of a lock spring) is accommodated. An urging pressure receiving surface Q is formed by the recess 45e and an end surface (upper surface in FIG. 8) of the first lock member 45 at the outer peripheral position of the recess 45e.

第１収容部５１は、カムシャフト１の回転軸芯Ｘの方向に沿って仕切突起２２に形成され、フロントプレート２の側からリヤプレート３の側に亘って内部ロータ２０を貫通している。第１収容部５１は、例えば、径が異なる円筒状の空間を３段積み重ねた形状であって、第１ロック部材４５がその内部で移動可能なように形成してある。第１収容部５１の内周面のうち後述する連通油路８５と接続する部分には、断面半円状の縦溝部５１ａが形成される。この縦溝部５１ａと連通油路８５とを介して、後述する第１油室５４、第２油室５５及び第４油室６５は連通するよう構成されている。   The first accommodating portion 51 is formed on the partition protrusion 22 along the direction of the rotational axis X of the camshaft 1 and penetrates the internal rotor 20 from the front plate 2 side to the rear plate 3 side. The first accommodating portion 51 has, for example, a shape in which cylindrical spaces having different diameters are stacked in three stages, and is formed so that the first lock member 45 can move inside. A longitudinal groove 51a having a semicircular cross section is formed in a portion of the inner peripheral surface of the first accommodating portion 51 that is connected to a communication oil passage 85 described later. The first oil chamber 54, the second oil chamber 55, and the fourth oil chamber 65, which will be described later, are configured to communicate with each other through the vertical groove portion 51a and the communication oil passage 85.

規制凹部５２は、回転軸芯を中心とした円弧状であって、その径方向における位置は後述のロック凹部６２とはわずかに異なるように形成してある。規制凹部５２には、進角側の端部である第１端部５２ａと、遅角側の端部である第２端部５２ｂとが形成されている。第１ロック部材４５が第１端部５２ａと当接状態にある時は、相対回転位相が中間ロック位相となる。第１ロック部材４５が第２端部５２ｂと当接状態にある時は、相対回転位相が最遅角位相となる。即ち、規制凹部５２は規制範囲Ｆに対応している。   The restricting recess 52 has an arc shape centered on the rotation axis and is formed so that its position in the radial direction is slightly different from a lock recess 62 described later. The restriction recess 52 is formed with a first end portion 52a that is an end portion on the advance angle side and a second end portion 52b that is an end portion on the retard angle side. When the first lock member 45 is in contact with the first end 52a, the relative rotation phase becomes the intermediate lock phase. When the first lock member 45 is in contact with the second end 52b, the relative rotational phase becomes the most retarded phase. That is, the regulation recess 52 corresponds to the regulation range F.

第１ロック部材４５は、第１収容部５１に収容されるとともに、第１スプリング５３によってリヤプレート３の側に常時付勢されている。第１ロック部材４５の第１段部４５ａが規制凹部５２に突入すると、相対回転位相が規制範囲Ｆの範囲内に規制され、「規制状態」が作り出される。第１スプリング５３による付勢力に抗して第１段部４５ａが規制凹部５２から退出すると、規制状態が解除され、「規制解除状態」となる。   The first lock member 45 is housed in the first housing portion 51 and is always urged toward the rear plate 3 by the first spring 53. When the first step portion 45a of the first lock member 45 enters the restriction recess 52, the relative rotational phase is restricted within the restriction range F, and a “restricted state” is created. When the first step portion 45a withdraws from the restricting recess 52 against the urging force of the first spring 53, the restricting state is released and the “regulating release state” is entered.

第１ロック部材４５を第１収容部５１に収容すると、第１ロック部材４５と第１収容部５１とによって第１油室５４及び第２油室５５が形成される。第１油室５４は第１ロック部材４５の第２段部４５ｂの外側に形成され、第１油室５４に作動油が供給された場合には、第１ロック部材４５の第３段部４５ｃの底面である第１受圧面４５ｆに作動油圧を作用させて第１ロック部材４５を規制凹部５２から退出させる。第２油室５５は第１ロック部材４５の第３段部４５ｃの外側に形成され、第２油室５５に作動油が供給された場合には、第１ロック部材４５の第４段部４５ｄの底面である第２受圧面４５ｇに作動油圧を作用させて第１ロック部材４５を規制凹部５２から退出させる。尚、第１油室５４と第２油室５５とは、縦溝部５１ａを介して連通している。   When the first lock member 45 is housed in the first housing portion 51, the first oil chamber 54 and the second oil chamber 55 are formed by the first lock member 45 and the first housing portion 51. The first oil chamber 54 is formed outside the second step 45 b of the first lock member 45, and when hydraulic oil is supplied to the first oil chamber 54, the third step 45 c of the first lock member 45. The hydraulic pressure is applied to the first pressure receiving surface 45f, which is the bottom surface of the first lock member 45, and the first lock member 45 is retracted from the restricting recess 52. The second oil chamber 55 is formed outside the third step portion 45 c of the first lock member 45, and when hydraulic oil is supplied to the second oil chamber 55, the fourth step portion 45 d of the first lock member 45. The hydraulic pressure is applied to the second pressure receiving surface 45g which is the bottom surface of the first lock member 45, and the first lock member 45 is retracted from the restricting recess 52. The first oil chamber 54 and the second oil chamber 55 communicate with each other through the longitudinal groove 51a.

また、第１ロック部材４５を第１収容部５１に収容すると、第１ロック部材４５とフロントプレート２とによって背面油室５６が形成される。この背面油室５６は、第１ロック部材４５の凹部４５ｅと一体の空間として形成され、後述する付勢油路８６から作動油が供給された場合には、第１ロック部材４５の付勢受圧面Ｑに作動油圧が作用することから第１ロック部材４５をリヤプレート３の側に付勢する。   When the first lock member 45 is accommodated in the first accommodating portion 51, the back oil chamber 56 is formed by the first lock member 45 and the front plate 2. The back oil chamber 56 is formed as a space integral with the recess 45e of the first lock member 45, and when hydraulic oil is supplied from a bias oil passage 86 described later, the bias receiving pressure of the first lock member 45 is provided. Since the hydraulic pressure acts on the surface Q, the first lock member 45 is urged toward the rear plate 3 side.

〔ロック機構Ｌ：拘束機構〕
相対回転位相を中間ロック位相にロック（拘束）する拘束機構６０の構成について、図８、図９及び図１０〜図２４に基づき説明する。拘束機構６０は、主に段付き円筒形の第２ロック部材４６と、第２ロック部材４６を収容する第２収容部６１と、第２ロック部材４６が突入可能となるようリヤプレート３の表面に形成された円孔形状のロック凹部６２とから構成される。 [Lock mechanism L: Restraint mechanism]
A configuration of the restraining mechanism 60 that locks (restrains) the relative rotation phase to the intermediate lock phase will be described with reference to FIGS. 8, 9, and 10 to 24. The restraining mechanism 60 includes a stepped cylindrical second lock member 46, a second housing portion 61 for housing the second lock member 46, and the surface of the rear plate 3 so that the second lock member 46 can enter. It is comprised from the circular recessed lock | rock recessed part 62 formed in this.

第２ロック部材４６は、例えば径が異なる円筒を２段積み重ねた形状である。この２段の円筒をリヤプレート３の側から順に、第１段部４６ａ及び第２段部４６ｂと称する。第１段部４６ａの径は、第２段部４６ｂの径よりも小さくなるように構成されている。   The second lock member 46 has a shape in which, for example, cylinders having different diameters are stacked in two stages. The two-stage cylinders are referred to as a first step portion 46a and a second step portion 46b in order from the rear plate 3 side. The diameter of the first step portion 46a is configured to be smaller than the diameter of the second step portion 46b.

第１段部４６ａはロック凹部６２に突入可能に形成され、第１段部４６ａがロック凹部６２に突入している状態の時は、相対回転位相が中間ロック位相にロックされる。第２段部４６ｂには円筒形の凹部４６ｃが形成され、第２スプリング６３が収容される。   The first step 46a is formed so as to be able to enter the lock recess 62, and when the first step 46a enters the lock recess 62, the relative rotation phase is locked to the intermediate lock phase. A cylindrical recess 46c is formed in the second step portion 46b and the second spring 63 is accommodated.

第２収容部６１は、回転軸芯の方向に沿って内部ロータ２０に形成され、フロントプレート２の側からリヤプレート３の側に亘って内部ロータ２０を貫通している。第２収容部６１は、径が異なる円筒状の空間を２段積み重ねた形状であって、第２ロック部材４６がその内部で移動可能なように形成してある。   The second accommodating portion 61 is formed in the inner rotor 20 along the direction of the rotation axis, and penetrates the inner rotor 20 from the front plate 2 side to the rear plate 3 side. The 2nd accommodating part 61 is the shape which piled up the cylindrical space from which a diameter differs 2 steps | paragraphs, Comprising: The 2nd lock member 46 is formed so that a movement inside is possible.

第２ロック部材４６は、第２収容部６１に収容されるとともに、第２スプリング６３によってリヤプレート３の側に常時付勢されている。第２ロック部材４６の第１段部４６ａがロック凹部６２に突入すると、相対回転位相が中間ロック位相に保持され、「ロック状態」が作り出される。第２スプリング６３による付勢力に抗して、第１段部４６ａがロック凹部６２から退出すると、ロック状態が解除され、「ロック解除状態」となる。   The second lock member 46 is housed in the second housing portion 61 and is always urged toward the rear plate 3 by the second spring 63. When the first step portion 46a of the second lock member 46 enters the lock recess 62, the relative rotation phase is held at the intermediate lock phase, and a “lock state” is created. When the first step portion 46a moves out of the lock recess 62 against the urging force of the second spring 63, the locked state is released and the “unlocked state” is established.

第２ロック部材４６をロック凹部６２に突入させると、第２ロック部材４６とロック凹部６２とによって第３油室６４が形成される。第３油室６４は第２ロック部材４６のリヤプレート３の側に形成され、第３油室６４に作動油が供給された場合には、第１ロック部材４５の第１段部４６ａの底面である第１受圧面４６ｄに作動油圧を作用させて第２ロック部材４６をロック凹部６２から退出させる。   When the second lock member 46 is inserted into the lock recess 62, a third oil chamber 64 is formed by the second lock member 46 and the lock recess 62. The third oil chamber 64 is formed on the rear plate 3 side of the second lock member 46, and when the hydraulic oil is supplied to the third oil chamber 64, the bottom surface of the first step portion 46 a of the first lock member 45. The hydraulic pressure is applied to the first pressure receiving surface 46d, and the second lock member 46 is retracted from the lock recess 62.

第２ロック部材４６を第２収容部６１に収容すると、第２ロック部材４６と第２収容部６１とによって第４油室６５が形成される。第４油室６５は第２ロック部材４６の第１段部４６ａの外側に形成され、第４油室６５に作動油が供給された場合には、第２ロック部材４６の第２段部４６ｂの底面である第２受圧面４６ｅに作動油圧を作用させて第２ロック部材４６をロック凹部６２から退出させたロック解除状態が保持される。   When the second lock member 46 is accommodated in the second accommodating portion 61, the fourth oil chamber 65 is formed by the second lock member 46 and the second accommodating portion 61. The fourth oil chamber 65 is formed outside the first step portion 46 a of the second lock member 46, and when hydraulic oil is supplied to the fourth oil chamber 65, the second step portion 46 b of the second lock member 46. The unlocked state in which the hydraulic pressure is applied to the second pressure receiving surface 46e, which is the bottom surface of the second locking member 46, to retract the second locking member 46 from the locking recess 62 is maintained.

次に各油路の構成について、図８、図９及び図１０〜図２４に基づき説明する。   Next, the structure of each oil passage is demonstrated based on FIG.8, FIG.9 and FIG.10-24.

〔規制解除油路〕
規制解除状態を実現するための規制解除油路８１（解除油路の一例）は、規制時連通油路８２と解除時連通油路８３とを備えている。規制時連通油路８２は、後述するリヤプレート油路９１とＵ字状油路９２とからなり、規制状態を解除するために進角室Ｒ１から第１油室５４に作動油を供給する油路である。又、解除時連通油路８３は、第１ロック部材４５が規制凹部５２から退出している時に、規制解除状態を保持するために進角室Ｒ１から第１油室５４に作動油を供給する油路である。 [Deregulated oil passage]
The restriction release oil path 81 (an example of a release oil path) for realizing the restriction release state includes a restriction time communication oil path 82 and a release time communication oil path 83. The restriction communication oil passage 82 is composed of a later-described rear plate oil passage 91 and a U-shaped oil passage 92, and supplies hydraulic oil from the advance chamber R1 to the first oil chamber 54 in order to release the restriction state. Road. Further, the release communicating oil passage 83 supplies hydraulic oil from the advance chamber R1 to the first oil chamber 54 in order to maintain the restriction release state when the first lock member 45 is retracted from the restriction recess 52. It is an oil passage.

第１油室５４は縦溝部５１ａを介して第２油室５５と連通するとともに、縦溝部５１ａ及び後述する連通油路８５を介して第４油室６５と連通している。従って、規制解除油路８１、即ち規制時連通油路８２及び解除時連通油路８３のうち何れかから第１油室５４に供給された作動油は、第２油室５５及び第４油室６５に供給される。   The first oil chamber 54 communicates with the second oil chamber 55 via the vertical groove portion 51a, and communicates with the fourth oil chamber 65 via the vertical groove portion 51a and a communication oil passage 85 described later. Therefore, the hydraulic oil supplied to the first oil chamber 54 from any one of the restriction release oil passage 81, that is, the restriction communication oil passage 82 and the release communication oil passage 83, is supplied to the second oil chamber 55 and the fourth oil chamber. 65.

リヤプレート油路９１は、リヤプレート３の内部ロータ２０の側の表面に形成された円弧溝状の油路であり、進角室Ｒ１と連通している。又、Ｕ字状油路９２は、内部ロータ２０のリヤプレート３の側の表面に形成されたＵ字溝状の油路であり、第１油室５４に連通している。リヤプレート油路９１は、第１ロック部材４５が規制範囲Ｆの範囲内における所定の遅角側の範囲（以下、「規制解除可能範囲Ｇ」と称する）内にある時にのみ、Ｕ字状油路９２と連通するように構成されている。尚、規制解除可能範囲Ｇの範囲内に第１ロック部材４５があるとは、第１段部４５ａの全領域が規制解除可能範囲Ｇの範囲内にあることをいう。   The rear plate oil passage 91 is a circular groove-like oil passage formed on the surface of the rear plate 3 on the inner rotor 20 side, and communicates with the advance chamber R1. The U-shaped oil passage 92 is a U-shaped groove-like oil passage formed on the surface of the inner rotor 20 on the rear plate 3 side, and communicates with the first oil chamber 54. The rear plate oil passage 91 is U-shaped oil only when the first locking member 45 is within a predetermined retarded range within the restriction range F (hereinafter referred to as “restriction release possible range G”). It is configured to communicate with the path 92. Note that the presence of the first lock member 45 within the restriction releaseable range G means that the entire region of the first step portion 45a is within the restriction releaseable range G.

即ち、規制時連通油路８２は、第１ロック部材４５が規制解除可能範囲Ｇの範囲内にあり、リヤプレート油路９１とＵ字状油路９２とが連通状態の時に進角室Ｒ１に作動油が供給されると、第１油室５４及び第２油室５５に作動油を供給し、第１受圧面４５ｆ及び第２受圧面４５ｇに作動油圧を作用させて第１ロック部材４５による規制状態を解除する。   That is, the restriction communication fluid passage 82 is in the advance chamber R1 when the first lock member 45 is within the restriction release possible range G and the rear plate oil passage 91 and the U-shaped oil passage 92 are in communication. When the hydraulic oil is supplied, the hydraulic oil is supplied to the first oil chamber 54 and the second oil chamber 55, and the hydraulic pressure is applied to the first pressure receiving surface 45f and the second pressure receiving surface 45g so that the first lock member 45 Release the restricted state.

解除時連通油路８３は、仕切突起２２の内部に形成された管状の油路であり、進角室Ｒ１と連通している。第１ロック部材４５が規制凹部５２に突入して規制状態にある場合には、第１ロック部材４５の第３段部４５ｃの側壁によって、解除時連通油路８３と第１油室５４との連通が遮断される。これに対して、第１ロック部材４５が規制凹部５２から退出して規制解除状態となっている時には、解除時連通油路８３は第１油室５４に連通し、進角室Ｒ１から供給される作動油により規制解除状態を保持する。   The release-time communication oil passage 83 is a tubular oil passage formed inside the partition projection 22 and communicates with the advance chamber R1. When the first lock member 45 enters the restriction recess 52 and is in a restricted state, the release-side communication oil path 83 and the first oil chamber 54 are separated by the side wall of the third step 45c of the first lock member 45. Communication is interrupted. On the other hand, when the first lock member 45 is retracted from the restricting recess 52 and is in the restriction release state, the release-time communication oil passage 83 communicates with the first oil chamber 54 and is supplied from the advance chamber R1. The state of deregulation is maintained by the hydraulic oil.

進角室Ｒ１から第１油室５４に作動油が供給される場合、規制時連通油路８２と解除時連通油路８３とのうち何れから第１油室５４に作動油が供給されるかは、基本的には第１ロック部材４５の動作に応じて択一的となるように構成されている。しかし、厳密には、規制時連通油路８２と解除時連通油路８３との切換時においては、規制時連通油路８２及び解除時連通油路８３の何れからも作動油が第１油室５４に供給されるように構成してある。これは、規制時連通油路８２と解除時連通油路８３との切換時に何れの連通油路も第１油室５４と連通しない状況が生じると、第１油室５４が一時的に密閉状態となり、第１ロック部材４５の動作の円滑性が損なわれてしまうのを防止するためである。   When hydraulic fluid is supplied from the advance chamber R1 to the first oil chamber 54, from which of the restriction communication fluid passage 82 and the release communication fluid passage 83 the hydraulic fluid is supplied to the first oil chamber 54 Is basically configured to be alternative according to the operation of the first lock member 45. However, strictly speaking, when switching between the restriction communication fluid passage 82 and the release communication fluid passage 83, the hydraulic oil flows from the regulation communication fluid passage 82 and the release communication fluid passage 83 from the first oil chamber. 54 to be supplied. This is because the first oil chamber 54 is temporarily sealed when there is a situation where none of the communication oil passages communicates with the first oil chamber 54 when switching between the restriction communication oil passage 82 and the release communication oil passage 83. This is to prevent the smoothness of the operation of the first lock member 45 from being impaired.

〔ドレン油路〕
ドレン油路８７は、第１ロック部材４５が規制凹部５２に突入する時に、第１ロック部材４５の移動抵抗となる第１油室５４及び第２油室５５の内部の作動油を速やかに排出するための油路である。ドレン油路８７は、リヤプレート３を回転軸芯の方向に貫通するよう形成されている。 [Drain oil passage]
The drain oil passage 87 quickly discharges the hydraulic oil inside the first oil chamber 54 and the second oil chamber 55 that becomes the movement resistance of the first lock member 45 when the first lock member 45 enters the restriction recess 52. It is an oil passage for doing. The drain oil passage 87 is formed so as to penetrate the rear plate 3 in the direction of the rotation axis.

ドレン油路８７は、第１ロック部材４５が規制解除可能範囲Ｇよりも進角側の所定の範囲にある時にのみＵ字状油路９２と連通し、第１油室５４及び第２油室５５の内部の作動油がＵ字状油路９２及びドレン油路８７を介して排出される。第１ロック部材４５が規制解除可能範囲Ｇの範囲内にある時には、ドレン油路８７とＵ字状油路９２とが連通しないように構成してあるため、リヤプレート油路９１とＵ字状油路９２とが連通している時に、進角室Ｒ１から供給された作動油が、そのままドレン油路８７に排出されるのを防止する。   The drain oil passage 87 communicates with the U-shaped oil passage 92 only when the first lock member 45 is in a predetermined range on the advance side of the restriction releaseable range G, and the first oil chamber 54 and the second oil chamber The hydraulic oil inside 55 is discharged through the U-shaped oil passage 92 and the drain oil passage 87. Since the drain oil passage 87 and the U-shaped oil passage 92 are configured not to communicate with each other when the first lock member 45 is within the restriction releaseable range G, the rear plate oil passage 91 and the U-shape are formed. When the oil passage 92 communicates with the oil passage 92, the hydraulic oil supplied from the advance chamber R1 is prevented from being discharged to the drain oil passage 87 as it is.

〔ロック解除油路〕
ロック解除油路８４は、リヤプレート３に形成された溝状の油路であり、第３油室６４と連通している。第２ロック部材４６がロック凹部６２に突入したロック状態では、ロック解除油路８４は遅角室Ｒ２と連通するよう構成されており、遅角室Ｒ２からロック解除油路８４を介して第３油室６４に供給された作動油が、第２ロック部材４６の第１受圧面４６ｄに作動油圧を作用させ、第２ロック部材４６をロック凹部６２から退出させてロック解除状態とする。 [Unlocked oil passage]
The unlocking oil passage 84 is a groove-like oil passage formed in the rear plate 3 and communicates with the third oil chamber 64. In the locked state in which the second lock member 46 has entered the lock recess 62, the lock release oil passage 84 is configured to communicate with the retard chamber R2, and the third lock member 84 passes through the lock release oil passage 84 from the retard chamber R2. The hydraulic oil supplied to the oil chamber 64 causes the hydraulic pressure to act on the first pressure receiving surface 46d of the second lock member 46, and the second lock member 46 is retracted from the lock recess 62 to be in the unlocked state.

〔連通油路〕
連通油路８５は、仕切突起２２の内部に形成された管状の油路であり、第１収容部５１の縦溝部５１ａと第４油室６５とを連通している。規制解除油路８１、即ち規制時連通油路８２及び解除時連通油路８３のうち何れかから第１油室５４に作動油が供給されると、第１油室５４内の作動油が縦溝部５１ａを介して連通油路８５に供給され、その結果、第４油室６５に作動油が供給されるため、ロック解除状態を保持することができる。 [Communication oil passage]
The communication oil passage 85 is a tubular oil passage formed inside the partition protrusion 22, and communicates the vertical groove portion 51 a of the first housing portion 51 and the fourth oil chamber 65. When hydraulic oil is supplied to the first oil chamber 54 from any one of the restriction release oil passage 81, that is, the restriction communication oil passage 82 and the release communication oil passage 83, the hydraulic oil in the first oil chamber 54 becomes vertical. Since the hydraulic oil is supplied to the communication oil passage 85 via the groove 51a and as a result, the hydraulic oil is supplied to the fourth oil chamber 65, the unlocked state can be maintained.

〔付勢油路〕
遅角油路２６がカムシャフト１の内部から内部ロータ２０に亘って形成され、カムシャフト１の内部の遅角油路２６の中間部分にロック作動側分岐部Ｅを形成し、このロック作動側分岐部Ｅで分岐した作動油を背面油室５６に供給する付勢油路８６が形成されている。従って、遅角室Ｒ２に作動油が供給される際には、ロック作動側分岐部Ｅで分岐した作動油が付勢油路８６を介して背面油室５６に供給され、この作動油圧が付勢受圧面Ｑに作用し、第１ロック部材４５をリヤプレート３の側に付勢するので速やかに規制状態を実現する。一方、進角室Ｒ１に作動油が供給されると、背面油室５６の作動油は付勢油路８６を介して排出されるので、速やかに規制解除状態を実現する。 [Energizing oil passage]
A retard oil passage 26 is formed from the inside of the camshaft 1 to the inner rotor 20, and a lock operation side branch E is formed in an intermediate portion of the retard oil passage 26 inside the camshaft 1. An urging oil passage 86 for supplying the hydraulic oil branched at the branch portion E to the back oil chamber 56 is formed. Accordingly, when hydraulic oil is supplied to the retard chamber R2, the hydraulic oil branched at the lock operation side branch E is supplied to the back oil chamber 56 via the urging oil passage 86, and this hydraulic pressure is applied. Since it acts on the pressure receiving surface Q and urges the first lock member 45 toward the rear plate 3, the restricted state is quickly realized. On the other hand, when the hydraulic oil is supplied to the advance chamber R1, the hydraulic oil in the rear oil chamber 56 is discharged through the urging oil passage 86, so that the restriction release state is realized promptly.

〔規制機構及びロック機構の動作〕
相対回転位相は、エンジン１００が停止する際には中間ロック位相でロック状態に達するように制御される。エンジン始動時には、中間ロック位相から相対回転位相を規制解除可能範囲Ｇの範囲内に変化させる遅角制御（遅角方向Ｓ２への制御）の後に、進角制御（進角方向Ｓ１への制御）を行うことによりロック状態を解除し、規制範囲Ｆのうち規制解除可能範囲Ｇに含まれない範囲内で進角制御に切り換えることによりロック状態を実現する。 [Operation of restriction mechanism and lock mechanism]
The relative rotation phase is controlled so that the locked state is reached at the intermediate lock phase when the engine 100 is stopped. When the engine is started, advance control (control in the advance direction S1) is performed after retard control (control in the retard direction S2) that changes the relative rotation phase from the intermediate lock phase to the range of the restriction releaseable range G. The lock state is released by performing and the lock state is realized by switching to the advance angle control within a range not included in the restriction release possible range G of the restriction range F.

〔ロック解除時及び規制解除時の動作〕
ロック状態を解除した後に規制状態を解除する手順、即ち、図１０、図１１に示す如く規制機構５０による規制と拘束機構６０による保持とが行われる第３状態から、図２２、図２３に示す如く拘束機構６０によるロック状態が解除された第２状態を経て図１６、図１７に示す如く拘束機構６０によるロック状態が解除され、更に、規制機構５０の規制が解除される第１状態に移行する手順について、図１０〜図１７に基づき説明する。 [Operations when unlocking and when releasing restrictions]
From the third state in which the restriction state is released after the lock state is released, that is, the third state in which the restriction mechanism 50 restricts and the restriction mechanism 60 holds as shown in FIGS. 10 and 11. As shown in FIG. 16 and FIG. 17, the locked state by the restraining mechanism 60 is released as shown in FIGS. 16 and 17 after the second state in which the locked state by the restraining mechanism 60 is released. The procedure to perform is demonstrated based on FIGS.

図１０、図１１は、エンジン１００の始動時及びエンジン１００の停止時のロック状態、即ち第３状態における規制機構５０及び拘束機構６０を示す。エンジン始動時には、電磁弁Ｖが進角ポジションＶｆにあるため進角室Ｒ１に作動油が供給される。しかし、第１ロック部材４５は規制解除可能範囲Ｇの範囲外にあるため、規制時連通油路８２からは第１油室５４に作動油が供給されない。又、解除時連通油路８３も第１油室５４と連通していないため、第１油室５４に作動油が供給されない。よって、ロック状態が維持される。   10 and 11 show the restriction mechanism 50 and the restraining mechanism 60 in the locked state when the engine 100 is started and when the engine 100 is stopped, that is, in the third state. When the engine is started, since the solenoid valve V is at the advance position Vf, hydraulic oil is supplied to the advance chamber R1. However, since the first lock member 45 is outside the restriction release possible range G, the hydraulic oil is not supplied from the restriction communication fluid passage 82 to the first oil chamber 54. Further, since the release oil passage 83 is not in communication with the first oil chamber 54, no hydraulic oil is supplied to the first oil chamber 54. Therefore, the locked state is maintained.

図１４、図１５は、エンジン始動後、ロック状態を解除するため、即ち第３状態から第２状態へ移行するために遅角制御により電磁弁Ｖが遅角ポジションＶｒに切り換えられた際の状態を示す。この際、ロック解除油路８４を介して遅角室Ｒ２から第３油室６４に作動油が供給され、第２ロック部材４６の第１受圧面４６ｄに作動油圧が作用し、第２ロック部材４６がロック凹部６２から退出してロック状態が解除される。ロック状態が解除されると、第１ロック部材４５は遅角方向に移動する。   14 and 15 show states when the solenoid valve V is switched to the retard position Vr by retard control in order to release the locked state after the engine is started, that is, to shift from the third state to the second state. Indicates. At this time, the hydraulic oil is supplied from the retard chamber R2 to the third oil chamber 64 via the unlocking oil passage 84, and the hydraulic pressure acts on the first pressure receiving surface 46d of the second lock member 46, and the second lock member. 46 exits from the lock recess 62 and the locked state is released. When the locked state is released, the first lock member 45 moves in the retarding direction.

図示しない位相センサが、第１ロック部材４５が規制解除可能範囲Ｇの範囲内に位置する相対回転位相となったことを検知すると、ＥＣＵは、進角制御により電磁弁Ｖを進角ポジションＶｆに切り換え、第２状態から第１状態へ移行が行われる。この移行時の状態を図１４、図１５に示す。リヤプレート油路９１とＵ字状油路９２とが連通しているため、規制時連通油路８２から第１油室５４に作動油が供給される。すると、第１ロック部材４５の第１受圧面４５ｆに作動油圧が作用し、第１ロック部材４５は規制凹部５２から退出し、規制状態が解除される。   When a phase sensor (not shown) detects that the first lock member 45 has reached a relative rotational phase that is located within the restriction releaseable range G, the ECU moves the electromagnetic valve V to the advance position Vf by advance angle control. Switching is performed from the second state to the first state. The state at the time of this transition is shown in FIGS. Since the rear plate oil passage 91 and the U-shaped oil passage 92 communicate with each other, the hydraulic oil is supplied from the restriction communication fluid passage 82 to the first oil chamber 54. Then, the hydraulic pressure is applied to the first pressure receiving surface 45f of the first lock member 45, the first lock member 45 is withdrawn from the restriction recess 52, and the restriction state is released.

この時、第１油室５４内の作動油は、縦溝部５１ａを介して第２油室５５にも供給されるので、第１ロック部材４５の第２受圧面４５ｇにも作動油圧が作用するとともに、背面油室５６からは付勢油路８６を介して作動油が排出されるので、第１ロック部材４５は規制凹部５２から速やかに退出することができる。又、第１油室５４内の作動油は、縦溝部５１ａ及び連通油路８５を介して第４油室６５にも供給されるので、第２ロック部材４６の第２受圧面４６ｅにも作動油圧が作用し、ロック解除状態を保持する。   At this time, the hydraulic oil in the first oil chamber 54 is also supplied to the second oil chamber 55 via the longitudinal groove 51a, so that the hydraulic pressure also acts on the second pressure receiving surface 45g of the first lock member 45. At the same time, the hydraulic oil is discharged from the back oil chamber 56 via the urging oil passage 86, so that the first lock member 45 can be quickly withdrawn from the restriction recess 52. Further, since the hydraulic oil in the first oil chamber 54 is also supplied to the fourth oil chamber 65 via the longitudinal groove 51a and the communication oil passage 85, the hydraulic oil also operates on the second pressure receiving surface 46e of the second lock member 46. Hydraulic pressure is applied and the unlocked state is maintained.

遅角油路２６及び付勢油路８６の最小管径が、進角油路２５の最小管径よりも大きくなるように構成されていると、第２状態から第１状態に移行する時に、背面油室５６の内部の作動油が付勢油路８６を介して排出されやすくなるので好適である。即ちこのような構成により、背面油室５６の内部の作動油による残圧により第１ロック部材４５を規制凹部５２から退出させ難くなるということがなく、より速やかに規制状態の解除を実現することができる。   When the minimum pipe diameter of the retard oil passage 26 and the urging oil passage 86 is configured to be larger than the minimum pipe diameter of the advance oil passage 25, when the second state shifts to the first state, It is preferable because the hydraulic oil inside the back oil chamber 56 is easily discharged through the urging oil passage 86. That is, with such a configuration, it is not difficult for the first lock member 45 to be retracted from the restriction recess 52 due to the residual pressure due to the hydraulic oil inside the back oil chamber 56, and the restriction state can be quickly released. Can do.

又、本第２実施形態においては、油圧ポンプＰと電磁弁Ｖとの間に、油圧ポンプＰの側への作動油の流れを禁止する逆止弁７５を備えている。従って、進角制御時に、カムトルクの影響による進角室Ｒ１における作動油圧の変動を抑えることができるので、進角室Ｒ１の作動油圧の変動下限値を上昇させることができ、より速やかに規制状態の解除を実現することができる   In the second embodiment, a check valve 75 that prohibits the flow of hydraulic oil toward the hydraulic pump P is provided between the hydraulic pump P and the electromagnetic valve V. Therefore, since the fluctuation of the hydraulic pressure in the advance chamber R1 due to the influence of the cam torque can be suppressed during the advance angle control, the lower limit value of the fluctuation of the hydraulic pressure in the advance chamber R1 can be increased, and the regulation state can be achieved more quickly. Can be released

図１６、図１７は、進角制御によって、規制解除状態及びロック解除状態を保持している時の状態、即ち第１状態における規制機構５０及び拘束機構６０を示す。この時、解除時連通油路８３を介して進角室Ｒ１の作動油が第１油室５４に供給される。第１油室５４と第４油室６５とは縦溝部５１ａ及び連通油路８５により連通するため、進角室Ｒ１から第１油室５４に供給される作動油は、第４油室６５にも供給される。その結果、規制解除状態及びロック解除状態が保持される。   FIGS. 16 and 17 show the restriction mechanism 50 and the restraining mechanism 60 in the first state when the restriction release state and the lock release state are maintained by the advance angle control. At this time, the hydraulic oil in the advance chamber R1 is supplied to the first oil chamber 54 via the release-time communication oil passage 83. Since the first oil chamber 54 and the fourth oil chamber 65 communicate with each other through the longitudinal groove 51 a and the communication oil passage 85, the hydraulic oil supplied from the advance chamber R 1 to the first oil chamber 54 is supplied to the fourth oil chamber 65. Is also supplied. As a result, the restriction release state and the lock release state are maintained.

〔通常運転状態における動作〕
次に、規制解除状態及びロック解除状態、即ち第１状態が実現され通常の運転状態となった時の動作について、図１８〜図２１に基づき説明する。 [Operation during normal operation]
Next, the operation when the restriction release state and the lock release state, that is, the first state is realized and the normal operation state is achieved will be described with reference to FIGS.

通常の運転状態において、進角制御を行った時の状態を図１８、図１９に示す。進角制御の時には、進角室Ｒ１、解除時連通油路８３、第１油室５４、縦溝部５１ａ、連通油路８５及び第４油室６５が連通するから、規制解除状態及びロック解除状態が保持された状態で進角作動する。   18 and 19 show the state when the advance angle control is performed in the normal driving state. During advance angle control, the advance angle chamber R1, the release-time communication oil passage 83, the first oil chamber 54, the longitudinal groove 51a, the communication oil passage 85, and the fourth oil chamber 65 communicate with each other. The lead angle is activated when is held.

通常の運転状態において、遅角制御を行った時の状態を図２０、図２１に示す。この時、遅角室Ｒ２から第３油室６４に作動油が供給されるので、ロック解除状態が保持される。一方、第１油室５４には作動油が供給されないので、第１ロック部材４５は付勢油路８６から供給される作動油及び第１スプリング５３によって付勢され、リヤプレート３と当接する。この動作の際、第１油室５４、第２油室５５及び縦溝部５１ａの内部の作動油は、解除時連通油路８３を介して進角室Ｒ１に排出される。   FIGS. 20 and 21 show states when the retard control is performed in the normal operation state. At this time, since the hydraulic oil is supplied from the retard chamber R2 to the third oil chamber 64, the unlocked state is maintained. On the other hand, since the hydraulic oil is not supplied to the first oil chamber 54, the first lock member 45 is urged by the hydraulic oil supplied from the urging oil passage 86 and the first spring 53, and comes into contact with the rear plate 3. During this operation, the hydraulic oil inside the first oil chamber 54, the second oil chamber 55, and the longitudinal groove 51a is discharged to the advance chamber R1 via the release-time communication oil passage 83.

尚、上記のように第１ロック部材４５がリヤプレート３と当接するように付勢されても、第１ロック部材４５はリヤプレート３の表面上を滑動するので、弁開閉時期制御装置の動作に支障をきたすことはない。又、規制凹部５２とロック凹部６２は径方向にずらした位置に形成しているため、第１ロック部材４５がロック凹部６２に突入することはない。   Even if the first lock member 45 is urged to come into contact with the rear plate 3 as described above, the first lock member 45 slides on the surface of the rear plate 3, so that the operation of the valve opening / closing timing control device is performed. Will not be disturbed. Further, since the restricting recess 52 and the lock recess 62 are formed at positions shifted in the radial direction, the first lock member 45 does not enter the lock recess 62.

〔規制時及びロック時の動作〕
最後に、規制状態とした後にロック状態とする手順、即ち第１状態から第２状態を経て第３状態に移行する手順について、図２２〜図２５に基づき説明する。 [Operation when regulating and locking]
Finally, a procedure for setting the locked state after setting the restricted state, that is, a procedure for shifting from the first state to the third state through the second state will be described with reference to FIGS.

図示しない位相センサが、規制機構５０及び拘束機構６０が規制解除状態及びロック解除状態を保持している状態、即ち第１状態の時に、第１ロック部材４５が規制範囲Ｆの範囲内且つ規制解除可能範囲Ｇの範囲外に位置する相対回転位相となったことを検知すると、ＥＣＵは電磁弁Ｖを進角ポジションＶｆに切り換える。   When the phase sensor (not shown) is in a state in which the restriction mechanism 50 and the restriction mechanism 60 hold the restriction release state and the lock release state, that is, in the first state, the first lock member 45 is within the restriction range F and the restriction release. When it is detected that the relative rotational phase is located outside the possible range G, the ECU switches the solenoid valve V to the advance position Vf.

図２２、図２３は、規制状態が実現した状態、即ち第２状態と同様の状態における規制機構５０及び拘束機構６０を示す。このように第１ロック部材４５を規制凹部５２に突入させる際には、ロック作動側分岐部Ｅで分岐した作動油が付勢油路８６から背面油室５６の付勢受圧面Ｑに供給され、この作動油圧と第１スプリング５３により第１ロック部材４５がリヤプレート３の側に付勢される。このような付勢が行われると共に、Ｕ字状油路９２とドレン油路８７とが連通し、第１油室５４、第２油室５５及び縦溝部５１ａの内部の作動油がドレン油路８７から排出されるので、第１ロック部材４５は速やかに規制凹部５２に突入する。   22 and 23 show the restriction mechanism 50 and the restraining mechanism 60 in a state where the restriction state is realized, that is, the same state as the second state. As described above, when the first lock member 45 is caused to enter the restricting recess 52, the hydraulic oil branched at the lock operation side branch E is supplied from the bias oil passage 86 to the bias pressure receiving surface Q of the rear oil chamber 56. The first lock member 45 is urged toward the rear plate 3 by the hydraulic pressure and the first spring 53. While such energization is performed, the U-shaped oil passage 92 and the drain oil passage 87 communicate with each other, and the hydraulic oil in the first oil chamber 54, the second oil chamber 55, and the vertical groove portion 51a is drained. Since the first locking member 45 is discharged from 87, the first locking member 45 quickly enters the restriction recess 52.

規制状態を実現してからも遅角制御を維持すると、第１ロック部材４５が規制解除可能範囲Ｇの範囲内に移動し、リヤプレート油路９１とＵ字状油路９２とが連通するので、次に進角制御に切り換えた時に規制状態が解除されてしまう。このため、規制状態を実現した後は、第１ロック部材４５が規制解除可能範囲Ｇの範囲内に移動する前に進角制御に切り換える必要がある。   If the retard control is maintained even after the restriction state is realized, the first lock member 45 moves within the restriction release possible range G, and the rear plate oil passage 91 and the U-shaped oil passage 92 communicate with each other. Then, the next time the control is switched to the advance angle control, the restricted state is released. For this reason, after realizing the restricted state, it is necessary to switch to advance angle control before the first lock member 45 moves within the restriction release possible range G.

第１ロック部材４５が規制解除可能範囲Ｇに入る前に進角制御に切り換えると、図２４、図２５に示すように、第１ロック部材４５は規制凹部５２から退出せずに進角作動する。その結果、第１ロック部材４５が規制凹部５２の第１端部５２ａに当接し、中間ロック位相に保持される。この時、連通油路８５への作動油供給が断たれているので、第２ロック部材４６は第２スプリング６３によって付勢されロック凹部６２に突入し、図１０、図１１に示したロック状態、即ち第３状態が実現される。この時、第３油室６４の内部の作動油はロック解除油路８４を介して遅角室Ｒ２から排出され、第４油室６５の内部の作動油は連通油路８５、縦溝部５１ａ、第１油室５４、Ｕ字状油路９２及びドレン油路８７を介して排出されるので、第２ロック部材４６の突入動作を妨げることがない。   If the first lock member 45 is switched to the advance angle control before entering the restriction release possible range G, the first lock member 45 moves forward without retreating from the restriction recess 52 as shown in FIGS. . As a result, the first lock member 45 comes into contact with the first end 52a of the restricting recess 52 and is held in the intermediate lock phase. At this time, since the hydraulic oil supply to the communication oil passage 85 is cut off, the second lock member 46 is urged by the second spring 63 and enters the lock recess 62, and the locked state shown in FIGS. That is, the third state is realized. At this time, the hydraulic oil inside the third oil chamber 64 is discharged from the retarded angle chamber R2 via the lock release oil passage 84, and the hydraulic oil inside the fourth oil chamber 65 is communicated with the communication oil passage 85, the vertical groove portion 51a, Since the oil is discharged through the first oil chamber 54, the U-shaped oil passage 92, and the drain oil passage 87, the entry operation of the second lock member 46 is not hindered.

このように、本第２実施形態では、第１ロック部材４５が規制凹部５２から退出した状態から、規制凹部５２に突入する場合には、第１スプリング５３の付勢力だけではなく、付勢油路８６から作用する油圧が第１ロック部材４５の付勢受圧面Ｑに対して突入方向に作用するため、この油圧によりアシストされる状態で規制凹部５２に突入することが可能となる。   As described above, in the second embodiment, when the first lock member 45 enters the restriction recess 52 from the state where the first lock member 45 is retracted from the restriction recess 52, not only the biasing force of the first spring 53 but also the bias oil Since the hydraulic pressure acting from the path 86 acts in the rushing direction on the urging pressure receiving surface Q of the first lock member 45, it is possible to rush into the restricting recess 52 in a state assisted by this hydraulic pressure.

特に、付勢油路８６がロック作動側分岐部Ｅからの作動油を、付勢受圧面Ｑに対して作用させる構成であるため、カムシャフト１から作用する外力により相対回転位相が変動する場合のように遅角室Ｒ２の作動油の圧力が変動する場合にも、圧力変動がない作動油の圧力を継続的に付勢受圧面Ｑに作用させることが可能となり、規制凹部５２に対して迅速に突入させる作動を実現している。   In particular, since the urging oil passage 86 is configured to cause the hydraulic oil from the lock operation side branch portion E to act on the urging pressure receiving surface Q, the relative rotation phase varies due to the external force acting from the camshaft 1. Thus, even when the hydraulic oil pressure in the retarding chamber R2 fluctuates as described above, it becomes possible to cause the hydraulic oil pressure without pressure fluctuation to continuously act on the biased pressure receiving surface Q, with respect to the restriction recess 52. Realizes quick entry.

本発明は、ロックピンを油圧式に作動させる弁開閉時期制御装置に利用することができる。   The present invention can be used for a valve opening / closing timing control device that hydraulically operates a lock pin.

１ カムシャフト
１０ 駆動側回転部材（外部ロータ）
２０ 従動側回転部材（内部ロータ）
３１ 出退部材（ロックピン）
３２ 嵌合凹部
３３ スプリング（ロックスプリング）
３５ 解除油路（連通解除油路）
３６ 解除油路（独立解除油路）
３７ 作動油路（ロック作動油路）
４５ 出退部材（第１ロック部材）
４６ 出退部材（第２ロック部材）
５２ 嵌合凹部（規制凹部）
５３ ロックスプリング（第１スプリング）
８１ 解除油路（規制解除油路）
８６ 作動油路（付勢油路）
Ｄ 分岐部（ロック解除側分岐部）
Ｒ１ 進角室
Ｒ２ 遅角室
Ｔ１ 第１受圧面
Ｔ２ 第２受圧面
Ｌ ロック機構 1 Camshaft 10 Drive-side Rotating Member (External Rotor)
20 Driven side rotating member (internal rotor)
31 Retracting member (lock pin)
32 Fitting recess 33 Spring (lock spring)
35 Release oil passage (communication release oil passage)
36 Release oil passage (Independent release oil passage)
37 Hydraulic oil passage (Lock hydraulic oil passage)
45 Retracting member (first locking member)
46 Retracting member (second locking member)
52 Fitting recess (regulation recess)
53 Lock spring (first spring)
81 Release oil passage (regulation release oil passage)
86 Hydraulic oil passage (energizing oil passage)
D branch part (unlock side branch part)
R1 Advance angle chamber R2 Delay angle chamber T1 First pressure receiving surface T2 Second pressure receiving surface L Lock mechanism

Claims (4)

内燃機関のクランクシャフトと同期回転する駆動側回転部材と、
前記駆動側回転部材と同軸上に配置され前記内燃機関の弁開閉用のカムシャフトと一体回転する従動側回転部材とを備え、
作動油の供給により前記駆動側回転部材と前記従動側回転部材と相対回転位相を遅角方向に変化させる遅角室と、作動油の供給により前記相対回転位相を進角方向に変化させる進角室とが形成され、
前記相対回転位相が最遅角と最進角との間にある所定の中間位相において前記駆動側回転部材と前記従動側回転部材との一方の回転部材に出退自在に支持される出退部材と、他方の回転部材に形成され前記出退部材が嵌合する嵌合凹部と、前記出退部材を延出方向に付勢するスプリングとを備えて、少なくとも前記スプリングの付勢力により前記出退部材が前記嵌合凹部に嵌合することにより前記相対回転位相を前記中間位相に拘束または前記中間位相の範囲内にて規制する出退機構が構成されると共に、
前記進角室または前記遅角室に単一の制御弁を介して前記作動油を供給する進角油路または遅角油路と、
前記進角室と前記遅角室との一方の油室への作動油の供給時に前記出退部材を前記嵌合凹部から抜き出す方向に作動油を供給する解除油路と、前記進角室と前記遅角室との他方の油室への作動油の供給時に前記出退部材を前記嵌合凹部に嵌合させる方向に作動油を供給する作動油路とを備え、前記作動油路が前記制御弁の下流で前記進角油路または前記遅角油路から分岐して前記遅角室および前記進角室を経由しない独立した油路として形成されている弁開閉時期制御装置。 A drive-side rotating member that rotates synchronously with the crankshaft of the internal combustion engine;
A driven-side rotating member that is arranged coaxially with the drive-side rotating member and rotates integrally with a camshaft for opening and closing the valve of the internal combustion engine;
A retarding chamber that changes the relative rotational phase in the retarded direction by supplying hydraulic oil, and an advance angle that changes the relative rotational phase in the advanced direction by supplying hydraulic oil. A chamber is formed,
A retractable member that is removably supported by one rotating member of the driving side rotating member and the driven side rotating member in a predetermined intermediate phase in which the relative rotational phase is between the most retarded angle and the most advanced angle. And a fitting recess formed in the other rotating member and into which the withdrawing / withdrawing member is fitted, and a spring for urging the withdrawing / withdrawing member in the extending direction , at least by the urging force of the spring. As a member is fitted into the fitting recess, a retracting mechanism is configured that restricts the relative rotational phase to the intermediate phase or restricts the relative rotational phase within the range of the intermediate phase ,
An advance oil passage or a retard oil passage for supplying the hydraulic oil to the advance chamber or the retard chamber via a single control valve;
A release oil passage for supplying hydraulic oil in a direction in which the withdrawal member is extracted from the fitting recess when hydraulic oil is supplied to one of the advance chamber and the retard chamber; and the advance chamber and a hydraulic oil path for supplying hydraulic fluid the advancing and retracting member when the supply of hydraulic oil to the other oil chamber of the retarded angle chamber in the direction of fitting into the fitting recessed portion, the previous SL hydraulic fluid passage A valve opening / closing timing control device formed as an independent oil passage that branches off from the advance oil passage or the retard oil passage downstream of the control valve and does not pass through the retard chamber and the advance chamber . 前記進角室に作動油を供給する前記進角油路と、前記遅角室に作動油を供給する前記遅角油路とが、前記従動側回転部材に形成されると共に、前記解除油路が、前記従動側回転部材の内部において前記進角油路又は前記遅角油路から分岐して形成されている請求項１記載の弁開閉時期制御装置。 And the advance angle oil passage for supplying hydraulic fluid to the advance chamber, together with the and the retard chamber the retard angle oil passage for supplying hydraulic fluid to is formed on the driven side rotational member, the release oil passage 2. The valve opening / closing timing control device according to claim 1, wherein the valve opening / closing timing control device is formed by branching from the advance oil passage or the retard oil passage in the driven rotation member. 前記進角室に作動油を供給する前記進角油路と、前記遅角室に作動油を供給する前記遅角油路とが、前記従動側回転部材に形成されると共に、前記作動油路が、前記従動側回転部材の内部において前記進角油路又は前記遅角油路から分岐して形成されている請求項１記載の弁開閉時期制御装置。 And the advance angle oil passage for supplying hydraulic fluid to the advance chamber, together with the and the retard chamber the retard angle oil passage for supplying hydraulic fluid to is formed on the driven side rotational member, said hydraulic fluid passage 2. The valve opening / closing timing control device according to claim 1, wherein the valve opening / closing timing control device is formed by branching from the advance oil passage or the retard oil passage in the driven rotation member. 前記出退部材を引退方向に作動油の油圧を作用させる第１受圧面と第２受圧面とが前記出退部材に形成され、前記進角室と前記遅角室との一方の油室からの作動油の油圧を前記第１受圧面に作用させる連通解除油路が形成され、前記進角室と前記遅角室との一方の油室に作動油を供給する油路から分岐した作動油の油圧を前記第２受圧面に作用させる前記解除油路が形成されている請求項１記載の弁開閉時期制御装置。   A first pressure receiving surface and a second pressure receiving surface that apply hydraulic pressure of hydraulic oil in the retracting direction to the retracting member are formed in the retracting member, and from one oil chamber of the advance chamber and the retard chamber A hydraulic fluid of the hydraulic fluid of the first hydraulic pressure is applied to the first pressure receiving surface, and a hydraulic fluid branched from an oil passage for supplying hydraulic fluid to one of the advance chamber and the retard chamber is formed. The valve opening / closing timing control device according to claim 1, wherein the release oil passage is formed to apply the hydraulic pressure of the oil to the second pressure receiving surface.
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