JP6188439B2 - Intake device for internal combustion engine - Google Patents

Intake device for internal combustion engine Download PDF

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JP6188439B2
JP6188439B2 JP2013126236A JP2013126236A JP6188439B2 JP 6188439 B2 JP6188439 B2 JP 6188439B2 JP 2013126236 A JP2013126236 A JP 2013126236A JP 2013126236 A JP2013126236 A JP 2013126236A JP 6188439 B2 JP6188439 B2 JP 6188439B2
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valve
housing
shaft portion
rotary shaft
stopper mechanism
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JP2015001196A (en
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純一 松崎
純一 松崎
河野　崇史
崇史 河野
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Mahle Filter Systems Japan Corp
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Mahle Filter Systems Japan Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

本発明は、例えば内燃機関の燃焼室内にタンブル流等のガス流動を発生させるために弁体を用いて吸気通路の通路断面積の少なくとも一部を開閉するような内燃機関の吸気装置に関する。   The present invention relates to an intake device for an internal combustion engine that uses a valve body to open and close at least a part of a passage cross-sectional area of the intake passage in order to generate a gas flow such as a tumble flow in a combustion chamber of the internal combustion engine.

内燃機関の燃焼室内にタンブル流等のガス流動を形成するための吸気制御弁として、気筒毎の吸気通路を複数並べて配置し、一本の回転中心軸回りに回転する多連の弁体で、各吸気通路の通路断面の一部を同時に開閉するようした構成のものが従来から知られている。   As an intake control valve for forming a gas flow such as a tumble flow in the combustion chamber of an internal combustion engine, a plurality of intake passages for each cylinder are arranged side by side, and a multiple valve body that rotates around a single rotation center axis. 2. Description of the Related Art Conventionally, a configuration in which a part of the cross section of each intake passage is simultaneously opened and closed is known.

例えば、特許文献１及び特許文献２においては、回転中心軸線そのものは各吸気通路の中心付近を横切って延びるものの、各弁部を略Ｕ字形状に形成することで、吸気通路を横切るシャフトが存在しないようにした構成が開示されている。   For example, in Patent Document 1 and Patent Document 2, although the rotation center axis itself extends across the vicinity of the center of each intake passage, there is a shaft that crosses the intake passage by forming each valve portion in a substantially U shape. A configuration that does not include is disclosed.

米国特許６７６３８０２号公報US Pat. No. 6,766,802 国際公開第２０１１／０６１２４７号International Publication No. 2011/061247

このように、各吸気通路の通路断面の一部を覆う弁部が、それぞれＵ字形状をなし、その端部が円筒状の軸部を介して隣接する弁部と順次連結された多連の弁体においては、反りや撓み等の変形が生じると、弁体と各吸気通路との相対的な位置関係がずれてしまい、弁部が吸気通路の内壁面に干渉する虞がある。特に、弁体に樹脂材料等を用いた場合、熱影響等による弁体の変形量が相対的に大きなものとなり、弁部が吸気通路の内壁面に対して干渉しやすくなる。   In this way, each of the valve portions covering a part of the cross section of each intake passage has a U shape, and the end portions thereof are sequentially connected to adjacent valve portions via a cylindrical shaft portion. In the valve body, when deformation such as warpage or bending occurs, the relative positional relationship between the valve body and each intake passage is displaced, and the valve portion may interfere with the inner wall surface of the intake passage. In particular, when a resin material or the like is used for the valve body, the amount of deformation of the valve body due to thermal influence or the like becomes relatively large, and the valve portion easily interferes with the inner wall surface of the intake passage.

また、弁部と吸気通路の内壁面とのクリアランスを予め大きく設定すれば、このクリアランスからの吸気の漏れ量が大きくなってしまうという問題がある。   In addition, if the clearance between the valve portion and the inner wall surface of the intake passage is set large in advance, there is a problem that the amount of intake air leakage from the clearance increases.

本発明は、吸気通路の通路断面積の少なくとも一部を開閉可能な弁部と、上記弁部の両側に位置して該弁部の回転軸となる回転軸部と、上記回転軸部を回転可能に支持するハウジングと、を有し、上記回転軸部の回転中心軸線に対して上記弁部がオフセットするよう構成された内燃機関の吸気装置において、上記弁部両側の上記回転軸部と上記ハウジングとの間には、上記回転軸部の円周方向に沿って、凹凸係合により上記回転軸部と上記ハウジングとの相対位置を規定するストッパー機構が設けられていることを特徴としている。   The present invention includes a valve portion that can open and close at least a part of a passage cross-sectional area of an intake passage, a rotation shaft portion that is located on both sides of the valve portion and serves as a rotation shaft of the valve portion, and the rotation shaft portion is rotated. An intake device for an internal combustion engine, wherein the valve unit is configured to be offset with respect to a rotation center axis of the rotary shaft unit. A stopper mechanism for defining a relative position between the rotating shaft portion and the housing by uneven engagement is provided between the housing and the housing along the circumferential direction of the rotating shaft portion.

より具体的には、上記回転軸部を回転可能に支持するとともに、上記吸気通路の内壁面の一部を構成するように上記ハウジングに対して固定される軸受部材を有し、上記軸受部材によって回転可能に支持される回転軸部には、上記ストッパー機構を構成する環状の係合溝部が形成され、上記ハウジングには、上記係合溝部に対応して、上記ストッパー機構を構成する係合突部が形成されている。   More specifically, the rotating shaft portion is rotatably supported and has a bearing member fixed to the housing so as to constitute a part of the inner wall surface of the intake passage. An annular engagement groove portion that constitutes the stopper mechanism is formed on the rotation shaft portion that is rotatably supported, and an engagement protrusion that constitutes the stopper mechanism is formed on the housing corresponding to the engagement groove portion. The part is formed.

本発明によれば、ストッパー機構により弁部及び回転軸部の軸方向に沿った位置がハウジングに対して所期の位置に固定されることになるため、総じて弁部及び回転軸部の変形を抑制することができる。また、ストッパー機構による弁部のハウジングに対する位置決めにより、弁部と吸気通路の内壁面との間に生じる回転軸部の軸方向に沿ったクリアランスを精度良く管理することが可能となる。   According to the present invention, the position along the axial direction of the valve portion and the rotary shaft portion is fixed to the desired position with respect to the housing by the stopper mechanism, so that the valve portion and the rotary shaft portion are generally deformed. Can be suppressed. Further, by positioning the valve portion with respect to the housing by the stopper mechanism, the clearance along the axial direction of the rotating shaft portion generated between the valve portion and the inner wall surface of the intake passage can be managed with high accuracy.

そのため、弁部と吸気通路の内壁面との間に生じる回転軸部の軸方向に沿ったクリアランスを相対的に小さく設定することができる。   Therefore, the clearance along the axial direction of the rotating shaft portion generated between the valve portion and the inner wall surface of the intake passage can be set relatively small.

本発明に係る内燃機関の吸気装置の全体斜視図。1 is an overall perspective view of an intake device for an internal combustion engine according to the present invention. 本発明に係る内燃機関の吸気装置の分解斜視図。1 is an exploded perspective view of an intake device for an internal combustion engine according to the present invention. 本発明に係る内燃機関の吸気装置の弁体ユニットの斜視図。The perspective view of the valve body unit of the intake device of the internal combustion engine which concerns on this invention. 本発明に係る内燃機関の吸気装置の要部を模式的に示した説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically the principal part of the intake device of the internal combustion engine which concerns on this invention.

以下、本発明の一実施例を図面に基づいて詳細に説明する。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

図１及び図２は、本発明を直列４気筒内燃機関のタンブル制御弁に適用した実施例を示しており、図１は全体斜視図、図２が分解斜視図である。また、図３は、後述する弁体ユニット１２の斜視図である。   1 and 2 show an embodiment in which the present invention is applied to a tumble control valve of an in-line four-cylinder internal combustion engine. FIG. 1 is an overall perspective view, and FIG. 2 is an exploded perspective view. FIG. 3 is a perspective view of a valve body unit 12 to be described later.

このタンブル制御弁は、図示せぬシリンダヘッドの吸気側の側面に取り付けられる制御弁ハウジング１と、４つの弁部１３を一連に備えた弁体アッセンブリ２と、から大略構成されている。   This tumble control valve is roughly constituted by a control valve housing 1 attached to a side surface of a cylinder head (not shown) on the intake side, and a valve body assembly 2 having a series of four valve portions 13.

制御弁ハウジング１は、吸気マニホールド（図示せず）の一部として硬質合成樹脂材料にて一体に成形された細長い箱状のハウジング本体３と、このハウジング本体３の前面開口部内に弁体アッセンブリ２を収容した状態でハウジング本体３前面を覆うように取り付けられる硬質合成樹脂材料からなるハウジングカバー４と、を有している。ハウジングカバー４は、ねじ５によりハウジング本体３に固定される。また、図１及び図２中の６は、ハウジング本体３の前面開口部の開口縁と、ハウジングカバー４の前面の外周縁を覆うガスケットであり、制御弁ハウジング１をシリンダヘッド（図示せず）に取り付けた際にこのシリンダヘッドと制御弁ハウジング１との間のシール性を確保するものである。   The control valve housing 1 includes an elongated box-shaped housing body 3 integrally formed of a hard synthetic resin material as a part of an intake manifold (not shown), and a valve body assembly 2 in a front opening of the housing body 3. And a housing cover 4 made of a hard synthetic resin material attached so as to cover the front surface of the housing main body 3 in a state where the housing is housed. The housing cover 4 is fixed to the housing body 3 with screws 5. 1 and 2 is a gasket that covers the opening edge of the front opening of the housing body 3 and the outer peripheral edge of the front surface of the housing cover 4, and the control valve housing 1 is a cylinder head (not shown). The sealing performance between the cylinder head and the control valve housing 1 is ensured when attached to the cylinder.

ハウジングカバー４は、各気筒の吸気ポート上流端にそれぞれ対応する矩形の窓状の開口部７を有している。ハウジングカバー４をハウジング本体３と組み合わせて制御弁ハウジング１とした状態では、図示せぬ吸気マニホールドのブランチ部（図示せず）から図示せぬシリンダヘッドの吸気ポート（図示せず）へと連続する４本の吸気通路８が横方向に一列に並んで構成される。   The housing cover 4 has a rectangular window-shaped opening 7 corresponding to the upstream end of the intake port of each cylinder. In a state in which the housing cover 4 is combined with the housing body 3 to form the control valve housing 1, it continues from a branch portion (not shown) of an intake manifold (not shown) to an intake port (not shown) of a cylinder head (not shown). Four intake passages 8 are arranged in a row in the horizontal direction.

ハウジング本体３は、その長手方向の一端に、図示せぬ回転型のアクチュエータが取り付けられるアクチュエータ取付フランジ９を有している。また、ハウジング本体３は、その長手方向の他端に、図示せぬ開度センサが取り付けられるセンサ取付フランジ１０を有している。タンブル制御弁が組み立てられた状態では、弁体アッセンブリ２の回転中心軸線Ｌが、センサ取付フランジ１０中央の開口部１０ａを通り、かつ各吸気通路８の略中心を横切って延びることになる。   The housing body 3 has an actuator attachment flange 9 to which a rotary actuator (not shown) is attached at one end in the longitudinal direction. The housing body 3 has a sensor mounting flange 10 to which an opening sensor (not shown) is mounted at the other end in the longitudinal direction. In a state where the tumble control valve is assembled, the rotation center axis L of the valve body assembly 2 passes through the opening 10a at the center of the sensor mounting flange 10 and extends substantially across the center of each intake passage 8.

本実施例における弁体アッセンブリ２は、一対の弁体ユニット１２を直列に連結した構成となっている。各弁体ユニット１２は、直列に並んだ一対の弁部１３を備えている。各弁体ユニット１２は、硬質合成樹脂材料からなり、それぞれ型成形により成形されている。   The valve body assembly 2 in the present embodiment has a configuration in which a pair of valve body units 12 are connected in series. Each valve body unit 12 includes a pair of valve portions 13 arranged in series. Each valve body unit 12 is made of a hard synthetic resin material and is molded by molding.

４つの弁部１３を備えた弁体アッセンブリ２は、４つの軸受２１を介して上述した制御弁ハウジング１内に回転自在に支持される。   The valve assembly 2 including the four valve portions 13 is rotatably supported in the control valve housing 1 described above via the four bearings 21.

軸受２１は、硬質合成樹脂から一体に成形されたものであって、各弁体ユニット１２の両端の端部軸部１６（後述）に対して軸方向から嵌め込まれる。   The bearing 21 is integrally molded from a hard synthetic resin, and is fitted from the axial direction to end shaft portions 16 (described later) at both ends of each valve body unit 12.

各軸受２１は、弁体アッセンブリ２をハウジング本体３に組み付ける際に、ハウジング本体３の各吸気通路８の両側に設けられた段部２４内に嵌合し、ハウジング本体３にハウジングカバー４を取り付けることで、抜け止めされる。つまり、これら軸受２１によって、吸気通路８の内壁面の一部が構成される。また、ハウジングカバー４の開口部７に隣接して形成された突出片２５が段部２４に隣接した位置に入り込むことによって、各軸受２１の軸方向の位置が規制される。   When the valve body assembly 2 is assembled to the housing body 3, the bearings 21 are fitted into the step portions 24 provided on both sides of the intake passages 8 of the housing body 3, and the housing cover 4 is attached to the housing body 3. This prevents it from coming off. That is, these bearings 21 constitute a part of the inner wall surface of the intake passage 8. Further, when the protruding piece 25 formed adjacent to the opening 7 of the housing cover 4 enters a position adjacent to the stepped portion 24, the axial position of each bearing 21 is regulated.

なお、タンブル制御弁は、各弁部１３が図１に示すようなハウジングカバー４に向かった回動姿勢にあるときに各吸気通路８の通路断面積の一部を一斉に閉じ、また、図１の姿勢から各弁部１３が下方へ回動した位置では、吸気通路８全体を一斉に開放する。   The tumble control valve simultaneously closes a part of the cross-sectional area of each intake passage 8 when each valve portion 13 is in a rotational posture toward the housing cover 4 as shown in FIG. In the position where each valve portion 13 is rotated downward from the posture of 1, the entire intake passage 8 is opened at the same time.

ここで、弁体ユニット１２は、図１〜図３に示すように、細長い矩形板状の一対の弁部１３と、各弁部１３の両側に位置する矩形板状の連結壁部１４と、一対の弁部１３の間に位置し、各弁部１３の内側の連結壁部１４に接続された断面円形の中間軸部１５と、各弁部１３の外側の連結壁部１４にそれぞれ接続された円筒状の相対的に短い端部軸部１６と、を有している。そして、弁体ユニット１２は、弁部１３が弁体アッセンブリ２の回転中心軸線Ｌに対してオフセットすると共に、各連結壁部１４が弁体アッセンブリ２の回転中心軸線Ｌに対して直交するよう形成されている。   Here, as shown in FIGS. 1 to 3, the valve body unit 12 includes a pair of elongated rectangular plate-like valve portions 13, rectangular plate-like connecting wall portions 14 located on both sides of each valve portion 13, and An intermediate shaft portion 15 having a circular cross section, which is located between the pair of valve portions 13 and connected to the inner connecting wall portion 14 of each valve portion 13, and is connected to the outer connecting wall portion 14 of each valve portion 13. And a relatively short end shaft portion 16 having a cylindrical shape. The valve body unit 12 is formed so that the valve portion 13 is offset with respect to the rotation center axis L of the valve body assembly 2 and each connecting wall portion 14 is orthogonal to the rotation center axis L of the valve body assembly 2. Has been.

弁部１３は、弁体アッセンブリ２の回転中心軸線Ｌと直交する断面における該回転中心軸線Ｌを中心とした円弧に沿うように、全体が湾曲している。この弁部１３には、剛性を高めるために、補強リブ１３ａが設定されている。補強リブ１３ａは、弁部１３の一方の面（本実施例では、閉弁時に下流側に面した面）に凹部１３ｂを形成することで、これら凹部１３ｂに隣接する相対的に厚肉となった部分によって形成される。本実施例では、弁部１３の対角線上や、弁部１３の短手方向に沿うように補強リブ１３ａが形成されている。   The entire valve portion 13 is curved so as to follow an arc centered on the rotation center axis L in a cross section orthogonal to the rotation center axis L of the valve body assembly 2. The valve portion 13 is provided with a reinforcing rib 13a in order to increase rigidity. The reinforcing rib 13a has a relatively thick wall adjacent to the concave portion 13b by forming the concave portion 13b on one surface of the valve portion 13 (in this embodiment, the surface facing the downstream side when the valve is closed). Formed by the part. In the present embodiment, the reinforcing ribs 13 a are formed along the diagonal line of the valve part 13 and along the short direction of the valve part 13.

中間軸部１５は、ハウジング本体３に形成された軸受部２２と、ハウジングカバー４の突出片２５に形成された軸受部２３とによって挟み込まれ、回転自在に支持される。   The intermediate shaft portion 15 is sandwiched between a bearing portion 22 formed on the housing body 3 and a bearing portion 23 formed on the protruding piece 25 of the housing cover 4 and is rotatably supported.

中間軸部１５には、内部に金属板をプレス成形してなる芯材１５ａが埋設されている。この芯材１５ａは、曲げ剛性を高めるために、図３に示すように、断面が円弧形ないし波形に成形されている。   A core material 15 a formed by press-molding a metal plate is embedded in the intermediate shaft portion 15. As shown in FIG. 3, the core material 15a has a cross section formed into an arc shape or a waveform in order to increase the bending rigidity.

端部軸部１６には、断面矩形の金属製のシャフト１７、１８、１９が圧入されている。   Metal shafts 17, 18, 19 having a rectangular cross section are press-fitted into the end shaft portion 16.

中間軸部１５及び端部軸部１６は、弁体ユニット１２及び弁体アッセンブリ２の回転軸になるものであって、両者は互いの軸心が同一直線上に位置するように設定されている。中間軸部１５及び端部軸部１６の回転中心軸線は、上述した弁体アッセンブリ２の回転中心軸線Ｌと一致する。中間軸部１５と端部軸部１６は、図示例では同一径に形成されているが、それぞれ異なる径となるよう形成することも可能である。   The intermediate shaft portion 15 and the end shaft portion 16 serve as rotational axes of the valve body unit 12 and the valve body assembly 2, and both are set so that their axis centers are located on the same straight line. . The rotation center axis lines of the intermediate shaft part 15 and the end shaft part 16 coincide with the rotation center axis line L of the valve body assembly 2 described above. The intermediate shaft portion 15 and the end shaft portion 16 are formed to have the same diameter in the illustrated example, but may be formed to have different diameters.

一対の弁体ユニット１２は、それぞれ上述したような同一の構成を有しており、これら２つの弁体ユニット１２が、中間連結シャフト１８によって互いに連結されている。中間連結シャフト１８は、その一端が一方の弁体ユニット１２の一端の端部軸部１６に圧入され、かつ他端が他方の弁体ユニット１２の一端の端部軸部１６に圧入されている。また、一方の弁体ユニット１２の他端の端部軸部１６には、短いセンサ連結シャフト１７が圧入され、他方の弁体ユニット１２の他端の端部軸部１６には、相対的に長いアクチュエータ連結シャフト１９が圧入されている。このように、一対の弁体ユニット１２をシャフト１７、１８、１９と共に直線状に組み立てることによって、４つの弁部１３が一連に並んだ弁体アッセンブリ２が構成される。   The pair of valve body units 12 have the same configuration as described above, and these two valve body units 12 are connected to each other by an intermediate connection shaft 18. One end of the intermediate connecting shaft 18 is press-fitted into the end shaft 16 of one end of the one valve body unit 12, and the other end is press-fitted into the end shaft 16 of one end of the other valve body unit 12. . In addition, a short sensor connecting shaft 17 is press-fitted into the other end shaft portion 16 of one valve body unit 12, and the other end shaft portion 16 of the other valve body unit 12 is relatively inserted into the end shaft portion 16. A long actuator connection shaft 19 is press-fitted. Thus, the valve body assembly 2 in which the four valve portions 13 are arranged in series is configured by assembling the pair of valve body units 12 together with the shafts 17, 18, and 19 in a straight line.

弁体アッセンブリ２両端のセンサ連結シャフト１７及びアクチュエータ連結シャフト１９は、例えば、弁体アッセンブリ２をハウジング本体３内に収容した後に、端部軸部１６に圧入されるが、組み立てが可能であれば、個々の弁体ユニット１２に予め圧入しておいてもよい。これらのセンサ連結シャフト１７及びアクチュエータ連結シャフト１９には、最終的には、図示せぬ開度センサ、及びアクチュエータがそれぞれ連結される。   The sensor connection shaft 17 and the actuator connection shaft 19 at both ends of the valve body assembly 2 are press-fitted into the end shaft portion 16 after the valve body assembly 2 is accommodated in the housing body 3, for example. Alternatively, it may be press-fitted into the individual valve body units 12 in advance. The sensor connection shaft 17 and the actuator connection shaft 19 are finally connected to an opening sensor and an actuator (not shown), respectively.

そして、本実施例のタンブル制御弁においては、弁部１３両側の中間軸部１５及び端部軸部１６と制御弁ハウジング１との間に、これら中間軸部１５及び端部軸部１６の円周方向に沿って、凹凸係合によりこれら中間軸部１５及び端部軸部１６と制御弁ハウジング１との軸方向の相対位置を規制するストッパー機構３１が設けられている。ストッパー機構３１は、中間軸部１５と制御弁ハウジング１との間に設けられたストッパー機構３１ａと、端部軸部１６と制御弁ハウジング１との間に設けられたストッパー機構３１ｂと、からなり、本実施例では２つのストッパー機構３１ａと、４つのストッパー機構３１ｂとを有している。   In the tumble control valve of the present embodiment, the intermediate shaft portion 15 and the end shaft portion 16 are arranged between the intermediate shaft portion 15 and the end shaft portion 16 on both sides of the valve portion 13 and the control valve housing 1. A stopper mechanism 31 is provided along the circumferential direction to restrict the relative axial positions of the intermediate shaft portion 15 and the end shaft portion 16 and the control valve housing 1 by uneven engagement. The stopper mechanism 31 includes a stopper mechanism 31 a provided between the intermediate shaft portion 15 and the control valve housing 1, and a stopper mechanism 31 b provided between the end portion shaft portion 16 and the control valve housing 1. In this embodiment, there are two stopper mechanisms 31a and four stopper mechanisms 31b.

ストッパー機構３１ａは、中間軸部１５の外周面に形成された環状の係合溝部３２ａと、ハウジング本体３の軸受部２２とハウジングカバー４の軸受部２３に突出形成された係合突部３３ａと、を有し、係合溝部３２ａの全周に係合突部３３ａが連続して係合することで、中間軸部１５と制御弁ハウジング１との軸方向の相対位置を規定する。係合突部３３ａは、軸受部２２及び軸受部２３の双方に形成され、両者を突き合わせた際に環状に連続するよう設定されている。   The stopper mechanism 31a includes an annular engagement groove portion 32a formed on the outer peripheral surface of the intermediate shaft portion 15, an engagement protrusion portion 33a formed to protrude from the bearing portion 22 of the housing body 3 and the bearing portion 23 of the housing cover 4. The engagement protrusion 33a is continuously engaged with the entire circumference of the engagement groove 32a, thereby defining the relative position in the axial direction between the intermediate shaft 15 and the control valve housing 1. The engaging projection 33a is formed on both the bearing 22 and the bearing 23, and is set so as to be continuous in an annular shape when both are abutted.

ストッパー機構３１ｂは、端部軸部１６の外周面に形成された環状の係合溝部３２ｂと、ハウジング本体３とハウジングカバー４の突出片２５に突出形成された係合突部３３ｂと、を有し、係合溝部３２ｂの全周に係合突部３３ｂが連続して係合することで、端部軸部１６と制御弁ハウジング１との軸方向の相対位置を規定する。係合突部３３ｂは、ハウジング本体３側と突出片２５の双方に形成され、両者を突き合わせた際に環状に連続するよう設定されている。   The stopper mechanism 31b has an annular engagement groove 32b formed on the outer peripheral surface of the end shaft portion 16, and an engagement protrusion 33b formed to protrude from the protrusion 25 of the housing body 3 and the housing cover 4. Then, the engagement protrusion 33b is continuously engaged with the entire circumference of the engagement groove 32b, whereby the axial relative position between the end shaft 16 and the control valve housing 1 is defined. The engaging protrusions 33b are formed on both the housing body 3 side and the protruding piece 25, and are set so as to continue in an annular shape when they are brought into contact with each other.

すなわち、ストッパー機構３１ａ、３１ｂにより、これらストッパー機構３１ａ、３１ｂに挟まれた弁部１３の制御弁ハウジング１に対する中間軸部１５及び端部軸部１６の軸方向に沿った位置決めが行われる。   That is, the stopper mechanisms 31a and 31b perform positioning of the valve portion 13 sandwiched between the stopper mechanisms 31a and 31b along the axial direction of the intermediate shaft portion 15 and the end shaft portion 16 with respect to the control valve housing 1.

換言すると、これらストッパー機構３１ａ、３１ｂによる弁部１３の制御弁ハウジング１に対する位置決めにより、図４に示すように、弁部１３と吸気通路８の内壁面との間に生じる中間軸部１５及び端部軸部１６の軸方向に沿ったクリアランスＣを精度良く管理することが可能となる。また、仮に弁部１３、中間軸部１５及び端部軸部１６に撓み等の変形が生じようとした場合でも、ストッパー機構３１により弁部１３、中間軸部１５及び端部軸部１６の位置が制御弁ハウジング１に対して所期の位置に固定されることになるため、総じて弁部１３、中間軸部１５及び端部軸部１６の変形を抑制することができる。   In other words, the intermediate shaft portion 15 and the end produced between the valve portion 13 and the inner wall surface of the intake passage 8 as shown in FIG. 4 due to the positioning of the valve portion 13 with respect to the control valve housing 1 by the stopper mechanisms 31a and 31b. The clearance C along the axial direction of the part shaft part 16 can be managed with high accuracy. In addition, even when deformation such as bending occurs in the valve portion 13, the intermediate shaft portion 15, and the end shaft portion 16, the positions of the valve portion 13, the intermediate shaft portion 15, and the end shaft portion 16 by the stopper mechanism 31. Is fixed at an intended position with respect to the control valve housing 1, the deformation of the valve portion 13, the intermediate shaft portion 15, and the end shaft portion 16 can be generally suppressed.

そのため、弁部１３と吸気通路８の内壁面との間に生じる中間軸部１５及び端部軸部１６の軸方向に沿ったクリアランスＣをストッパー機構３１を設けなかった場合に比べて小さくすることができる。   Therefore, the clearance C along the axial direction of the intermediate shaft portion 15 and the end shaft portion 16 generated between the valve portion 13 and the inner wall surface of the intake passage 8 is made smaller than when the stopper mechanism 31 is not provided. Can do.

そして、弁部１３と吸気通路８の内壁面との間に生じる中間軸部１５及び端部軸部１６の軸方向に沿ったクリアランスＣを相対的に小さく設定することができるので、このクリアランスＣからの吸気の漏れ量を相対的に小さくすることができる。そのため、例えば、弁体ユニット１２が、タンブル制御弁やスワール制御弁を構成する場合には、タンブル流やスワール流をより効率よく生成することが可能となる。   Since the clearance C along the axial direction of the intermediate shaft portion 15 and the end shaft portion 16 generated between the valve portion 13 and the inner wall surface of the intake passage 8 can be set relatively small, the clearance C The amount of intake air leakage can be relatively reduced. Therefore, for example, when the valve body unit 12 constitutes a tumble control valve or a swirl control valve, it becomes possible to generate a tumble flow or a swirl flow more efficiently.

また、ストッパー機構３１において、係合溝部３２を弁体ユニット１２側に設定することで、軸受２１を端部軸部１６に軸方向から嵌め込むことができる。   In the stopper mechanism 31, the bearing 21 can be fitted into the end shaft portion 16 from the axial direction by setting the engagement groove portion 32 on the valve body unit 12 side.

なお、弁部１３と吸気通路８の内壁面との間に生じる中間軸部１５及び端部軸部１６の軸方向に沿ったクリアランスＣは、弁部１３両側のストッパー機構３１と当該弁部との距離を近づけるほど精度よく管理することが可能であり、ひいては相対的により小さく設定可能となる。   The clearance C along the axial direction of the intermediate shaft portion 15 and the end shaft portion 16 generated between the valve portion 13 and the inner wall surface of the intake passage 8 is determined by the stopper mechanism 31 on both sides of the valve portion 13 and the valve portion. The closer the distance is, the more accurately it can be managed, and as a result, it can be set relatively smaller.

また、ストッパー機構３１は、係合突部３３が全体として円環状に連続するものに限定されるものではなく、例えばハウジング本体３側のみやハウジングカバー４側のみに円弧状に形成することも可能であり、あるいはハウジング本体３及びハウジングカバー４の双方に間欠的に形成することも可能である。   Further, the stopper mechanism 31 is not limited to the one in which the engaging protrusions 33 are continuous in an annular shape as a whole. For example, the stopper mechanism 31 can be formed in an arc shape only on the housing body 3 side or only on the housing cover 4 side. Alternatively, it may be formed intermittently on both the housing body 3 and the housing cover 4.

１…制御弁ハウジング
２…弁体アッセンブリ
３…ハウジング本体
４…ハウジングカバー
１２…弁体ユニット
１３…弁部
１４…連結壁部
１５…中間軸部
１６…端部軸部
２１…軸受
２２…軸受部
２３…軸受部
２５…突出片
３１…ストッパー機構
３１ａ…ストッパー機構
３１ｂ…ストッパー機構
３２…係合溝部
３２ａ…係合溝部
３２ｂ…係合溝部
３３…係合突部
３３ａ…係合突部
３３ｂ…係合突部 DESCRIPTION OF SYMBOLS 1 ... Control valve housing 2 ... Valve body assembly 3 ... Housing main body 4 ... Housing cover 12 ... Valve body unit 13 ... Valve part 14 ... Connection wall part 15 ... Intermediate shaft part 16 ... End part shaft part 21 ... Bearing 22 ... Bearing part 23 ... Bearing 25 ... Projection piece 31 ... Stopper mechanism 31a ... Stopper mechanism 31b ... Stopper mechanism 32 ... Engagement groove 32a ... Engagement groove 32b ... Engagement groove 33 ... Engagement protrusion 33a ... Engagement protrusion 33b ... Engagement Collision

Claims (1)

吸気通路の通路断面積の少なくとも一部を開閉可能な弁部と、上記弁部の両側に位置して該弁部の回転軸となる回転軸部と、上記回転軸部を回転可能に支持するハウジングと、を有し、上記回転軸部の回転中心軸線に対して上記弁部がオフセットするよう構成された内燃機関の吸気装置において、
上記回転軸部を回転可能に支持するとともに、上記吸気通路の内壁面の一部を構成するように上記ハウジングに対して固定される軸受部材を有し、
上記弁部両側の上記回転軸部と上記ハウジングとの間には、上記回転軸部の円周方向に沿って、凹凸係合により上記回転軸部と上記ハウジングとの相対位置を規定するストッパー機構が設けられ、
上記軸受部材によって回転可能に支持される回転軸部には、上記ストッパー機構を構成する環状の係合溝部が形成され、
上記ハウジングには、上記係合溝部に対応して、上記ストッパー機構を構成する係合突部が形成されていることを特徴とする内燃機関の吸気装置。 A valve part capable of opening and closing at least a part of the passage cross-sectional area of the intake passage, a rotary shaft part which is located on both sides of the valve part and serves as a rotary shaft of the valve part, and rotatably supports the rotary shaft part An intake device for an internal combustion engine, wherein the valve portion is configured to be offset with respect to a rotation center axis of the rotation shaft portion.
A bearing member fixed to the housing so as to constitute a part of an inner wall surface of the intake passage, and rotatably supporting the rotating shaft portion;
A stopper mechanism for defining a relative position between the rotary shaft portion and the housing by engaging the concave and convex portions along a circumferential direction of the rotary shaft portion between the rotary shaft portions on both sides of the valve portion and the housing. Is provided ,
An annular engagement groove that constitutes the stopper mechanism is formed on the rotating shaft that is rotatably supported by the bearing member,
An intake device for an internal combustion engine, wherein the housing is formed with an engaging projection that constitutes the stopper mechanism corresponding to the engaging groove .
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