JP2010216293A - Valve gear of internal combustion engine - Google Patents

Valve gear of internal combustion engine Download PDF

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JP2010216293A
JP2010216293A JP2009061567A JP2009061567A JP2010216293A JP 2010216293 A JP2010216293 A JP 2010216293A JP 2009061567 A JP2009061567 A JP 2009061567A JP 2009061567 A JP2009061567 A JP 2009061567A JP 2010216293 A JP2010216293 A JP 2010216293A
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adjuster
support member
cylinder
cylinder head
internal combustion
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JP5088339B2 (en
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Tomoko Tofukuji
智子 東福寺
Takanobu Arai
隆宜 荒井
Teruhisa Ueda
輝久 植田
Kimiyo Osada
貴美代 長田
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Toyota Motor Corp
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Toyota Motor Corp
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  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To secure high rigidity of an adjuster supporting member for supporting a lash adjuster in a valve gear of an internal combustion engine. <P>SOLUTION: The valve gear includes the adjuster supporting member 40 for supporting a hydraulic lash adjuster 38. The adjuster supporting member 40 includes adjuster insertion holes 46a-46d for supporting the lash adjusters 38 to each cylinder in four corners, an adjuster holder 42 having an ignition plug tube 48 at the center and a connection part 44 for connecting respective adjuster holders 42, and further includes the crest-shaped projections 50, 52 projecting toward a cam carrier 28 side in the connection part 44 and end 40a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、ラッシュアジャスタを備える内燃機関の動弁機構に関する。   The present invention relates to a valve operating mechanism for an internal combustion engine including a lash adjuster.

従来、例えば特許文献１には、コントロールアームをコントロールカムに当接させるための一対の付勢手段のガイド筒を点火プラグ収容筒と一体的に備える内燃機関の可変動弁機構が開示されている。   Conventionally, for example, Patent Document 1 discloses a variable valve mechanism for an internal combustion engine that includes a pair of urging means guide cylinders for bringing a control arm into contact with a control cam integrally with a spark plug housing cylinder. .

特開２００８−４５５４０号公報JP 2008-45540 A 特開２００３−３５２４５号公報JP 2003-35245 A 特開２００６−１６１６５５号公報JP 2006-161655 A 特開２００６−１６１６５６号公報JP 2006-161656 A

上述した特許文献１に記載の技術のように、内燃機関の動弁機構が備えるラッシュアジャスタを、シリンダヘッドに直に取り付けるのではなくアジャスタ支持部材を介してシリンダヘッドに搭載する構成が考えられる。しかしながら、このような構成では、アジャスタ支持部材の剛性が不足しがちとなり、動弁系の剛性が低下してしまうことが懸念される。また、動弁系の剛性が低下すると、バルブの異常挙動（ジャンプやバウンス）の発生回転数が低下してしまう。   As in the technique described in Patent Document 1 described above, a configuration is conceivable in which a lash adjuster provided in a valve mechanism of an internal combustion engine is mounted on a cylinder head via an adjuster support member instead of being directly attached to the cylinder head. However, in such a configuration, there is a concern that the rigidity of the adjuster support member tends to be insufficient, and the rigidity of the valve operating system is lowered. Further, when the rigidity of the valve train is lowered, the rotational speed at which abnormal valve behavior (jump or bounce) occurs is reduced.

この発明は、上述のような課題を解決するためになされたもので、ラッシュアジャスタを支持するアジャスタ支持部材の剛性を高く確保することのできる内燃機関の動弁機構を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a valve mechanism for an internal combustion engine that can ensure high rigidity of an adjuster support member that supports a lash adjuster. .

第１の発明は、内燃機関の動弁機構であって、
各気筒に橋渡すようにシリンダヘッド上に配置され、当該各気筒に配置されたラッシュアジャスタを支持するアジャスタ支持部材を備え、
前記アジャスタ支持部材は、
気筒毎に備えられ、前記シリンダヘッドを燃焼室の軸線方向から見た四隅に前記ラッシュアジャスタを支持する支持部を備え、当該軸線方向から見た中央に点火プラグを収容するプラグ収容筒を備えるアジャスタホルダーと、
各気筒の前記アジャスタホルダーを連結する連結部と、を含み、
前記アジャスタ支持部材は、少なくとも１つの前記連結部および当該アジャスタ支持部材における長手方向の少なくとも１つの端部のうちの少なくとも一方に、前記シリンダヘッドに搭載されるカムシャフト支持部材側に向けて突出する山状の突起部を更に含み、
前記山状の突起部は、前記カムシャフト支持部材に締結ボルトによって固定されることを特徴とする。 The first invention is a valve operating mechanism of an internal combustion engine,
An adjuster support member disposed on the cylinder head so as to bridge to each cylinder, and supporting a lash adjuster disposed in each cylinder,
The adjuster support member is
An adjuster provided for each cylinder, including a support portion for supporting the lash adjuster at four corners when the cylinder head is viewed from the axial direction of the combustion chamber, and a plug accommodating cylinder that accommodates a spark plug at the center viewed from the axial direction. With a holder,
A connecting portion for connecting the adjuster holder of each cylinder,
The adjuster support member protrudes toward at least one of the at least one connecting portion and at least one end portion in the longitudinal direction of the adjuster support member toward a camshaft support member mounted on the cylinder head. It further includes a mountain-shaped protrusion,
The mountain-shaped protrusion is fixed to the camshaft support member with a fastening bolt.

第１の発明によれば、アジャスタ支持部材における気筒間の部位（連結部）および端部の少なくとも一方に、カムシャフト支持部材を利用して高剛性部位を設けることができるので、アジャスタ支持部材の剛性を高く確保することができる。これにより、動弁系の剛性を効果的に向上させることができる。   According to the first aspect of the present invention, since the high rigidity portion can be provided using at least one of the portion between the cylinders (the connecting portion) and the end portion of the adjuster support member using the camshaft support member. High rigidity can be secured. Thereby, the rigidity of a valve operating system can be improved effectively.

本発明の実施の形態１における内燃機関の動弁機構の構成を説明するための断面図である。It is sectional drawing for demonstrating the structure of the valve mechanism of the internal combustion engine in Embodiment 1 of this invention. 図１に示すアジャスタ支持部材の詳細な構成を説明するための図である。It is a figure for demonstrating the detailed structure of the adjuster support member shown in FIG. カムキャリアとアジャスタ支持部材との締結構造を説明するための図である。It is a figure for demonstrating the fastening structure of a cam carrier and an adjuster support member.

実施の形態１．
図１は、本発明の実施の形態１における内燃機関の動弁機構１０の構成を説明するための断面図である。尚、ここでは、内燃機関は、直列４気筒型エンジンであるものとする。また、図１中に示す一点鎖線は、燃焼室１４の軸線Ｌである。
図１に示すように、内燃機関のシリンダヘッド１２には、燃焼室１４と吸気ポート１６との開閉を担う吸気弁１８と、燃焼室１４と排気ポート２０との開閉を担う排気弁２２とが配置されている。 Embodiment 1 FIG.
FIG. 1 is a cross-sectional view for explaining the configuration of a valve operating mechanism 10 for an internal combustion engine according to Embodiment 1 of the present invention. Here, it is assumed that the internal combustion engine is an in-line four-cylinder engine. Also, the alternate long and short dash line in FIG. 1 is the axis L of the combustion chamber 14.
As shown in FIG. 1, the cylinder head 12 of the internal combustion engine includes an intake valve 18 that opens and closes the combustion chamber 14 and the intake port 16, and an exhaust valve 22 that opens and closes the combustion chamber 14 and the exhaust port 20. Has been placed.

シリンダヘッド１２の上方には、吸気カムシャフト２４および排気カムシャフト２６を支持するためのカムキャリア２８が配置されている。ここでは、内燃機関の１つの気筒につき、それぞれ２つの吸気弁１８および排気弁２２を備えているものとする。そして、各気筒の吸気弁１８は、同一の吸気カムシャフト２４に対して吸気弁１８毎に固定された吸気カム３０によって開閉駆動されるものとし、同様に、各気筒の排気弁２２は、同一の排気カムシャフト２６に対して排気弁２２毎に固定された排気カム３２によって開閉駆動されるものとする。   A cam carrier 28 for supporting the intake camshaft 24 and the exhaust camshaft 26 is disposed above the cylinder head 12. Here, it is assumed that each cylinder of the internal combustion engine includes two intake valves 18 and exhaust valves 22. The intake valve 18 of each cylinder is driven to open and close by an intake cam 30 fixed for each intake valve 18 with respect to the same intake camshaft 24. Similarly, the exhaust valve 22 of each cylinder is the same. The exhaust camshaft 26 is driven to open and close by an exhaust cam 32 fixed to each exhaust valve 22.

また、図１に示すように、吸気カム３０の押圧力は、吸気ロッカーアーム３４を介して吸気弁１８に伝達され、同様に、排気カム３２の押圧力は、排気ロッカーアーム３６を介して排気弁２２に伝達されるようになっている。吸気ロッカーアーム３４の一端は、吸気弁１８（のバルブステム）によって支持されており、同様に、排気ロッカーアーム３６の一端は、排気弁２２（のバルブステム）によって支持されている。   As shown in FIG. 1, the pressing force of the intake cam 30 is transmitted to the intake valve 18 via the intake rocker arm 34, and similarly, the pressing force of the exhaust cam 32 is exhausted via the exhaust rocker arm 36. It is transmitted to the valve 22. One end of the intake rocker arm 34 is supported by the intake valve 18 (valve stem), and similarly, one end of the exhaust rocker arm 36 is supported by the exhaust valve 22 (valve stem).

また、ロッカーアーム３４、３６の他端は、油圧式ラッシュアジャスタ３８によってそれぞれ回転自在に支持されている。各ラッシュアジャスタ３８は、アジャスタ支持部材４０が備えるアジャスタホルダー４２によって支持されている。図１に示すように、アジャスタ支持部材４０は、シリンダヘッド１２に搭載されている。また、アジャスタ支持部材４０は、シリンダヘッド１２を燃焼室１４の軸線方向から見て、吸気カムシャフト２４と排気カムシャフト２６との間に配置されている。   The other ends of the rocker arms 34 and 36 are rotatably supported by hydraulic lash adjusters 38, respectively. Each lash adjuster 38 is supported by an adjuster holder 42 provided in the adjuster support member 40. As shown in FIG. 1, the adjuster support member 40 is mounted on the cylinder head 12. The adjuster support member 40 is disposed between the intake camshaft 24 and the exhaust camshaft 26 when the cylinder head 12 is viewed from the axial direction of the combustion chamber 14.

次に、上記図１に加えて図２を新たに参照して、アジャスタ支持部材４０の詳細な構成について説明を行う。
図２は、図１に示すアジャスタ支持部材４０の詳細な構成を説明するための図である。より具体的には、図２（Ａ）は、アジャスタ支持部材４０を、燃焼室１４の軸線方向においてシリンダヘッド１２の上方から見下ろした図であり、図２（Ｂ）は、図２（Ａ）におけるＡ−Ａ線断面図である。 Next, the detailed configuration of the adjuster support member 40 will be described with reference to FIG. 2 in addition to FIG.
FIG. 2 is a view for explaining the detailed configuration of the adjuster support member 40 shown in FIG. More specifically, FIG. 2 (A) is a view of the adjuster support member 40 as viewed from above the cylinder head 12 in the axial direction of the combustion chamber 14, and FIG. 2 (B) is a view of FIG. 2 (A). It is AA sectional view taken on the line.

アジャスタ支持部材４０は、各気筒に橋渡すようにシリンダヘッド１２上に配置されており、図２に示すように、気筒毎にラッシュアジャスタ３８を支持するアジャスタホルダー４２と、各アジャスタホルダー４２を連結する連結部４４とを備えている。図２および以下の説明においては、説明の便宜上、図２中の右端のアジャスタホルダー４２から順に、対応する気筒を示す符号「＃１」〜「＃４」を付し、同様に、右端の連結部４４から順に、対応する気筒間を示す符号「＃１２」、「＃２３」、および「＃３４」を付している。   The adjuster support member 40 is disposed on the cylinder head 12 so as to bridge to each cylinder. As shown in FIG. 2, the adjuster holder 42 that supports the lash adjuster 38 for each cylinder is connected to each adjuster holder 42. And a connecting portion 44. In FIG. 2 and the following description, for convenience of explanation, reference numerals “# 1” to “# 4” indicating the corresponding cylinders are attached in order from the right end adjuster holder 42 in FIG. Reference numerals “# 12”, “# 23”, and “# 34” are assigned to the corresponding cylinders in order from the portion 44.

図２に示すように、各アジャスタホルダー４２＃１〜４２＃４には、ラッシュアジャスタ３８を支持する支持部として機能する４つのアジャスタ挿入穴４６ａ〜４６ｄが形成されている。より具体的には、これらのアジャスタ挿入穴４６ａ〜４６ｄは、シリンダヘッド１２を燃焼室１４の軸線方向から見て（すなわち、図２に示す方向から見て）、各アジャスタホルダー４２＃１〜４２＃４の四隅に配置されている。   As shown in FIG. 2, each adjuster holder 42 # 1 to 42 # 4 is formed with four adjuster insertion holes 46 a to 46 d that function as a support portion that supports the lash adjuster 38. More specifically, these adjuster insertion holes 46a to 46d are provided with the adjuster holders 42 # 1 to 42d when the cylinder head 12 is viewed from the axial direction of the combustion chamber 14 (that is, viewed from the direction shown in FIG. 2). It is arranged at the four corners of # 4.

また、各アジャスタホルダー４２＃１〜４２＃４の中央には、点火プラグ（図示省略）の着脱を案内するための点火プラグチューブ４８＃１〜４８＃４がそれぞれ配置されている。より具体的には、点火プラグチューブ４８は、アジャスタホルダー４２に圧入されている。尚、点火プラグチューブ４８は、アジャスタホルダー４２と一体的に形成されるものであってもよい。   In addition, spark plug tubes 48 # 1 to 48 # 4 for guiding the attachment / detachment of the spark plugs (not shown) are arranged at the centers of the adjuster holders 42 # 1 to 42 # 4, respectively. More specifically, the spark plug tube 48 is press-fitted into the adjuster holder 42. The spark plug tube 48 may be formed integrally with the adjuster holder 42.

また、各連結部４４＃１２、４４＃２３、４４＃３４には、カムキャリア２８側に向けて突出するように、山状の突起部５０＃１２、５０＃２３、５０＃３４が形成されている。更に、アジャスタ支持部材４０における長手方向（図２の左右方向）の一方の端部４０ａにも、カムキャリア２８側に向けて突出するように、山状の突起部５２が形成されている。   Each of the connecting portions 44 # 12, 44 # 23, 44 # 34 is formed with a mountain-shaped protrusion 50 # 12, 50 # 23, 50 # 34 so as to protrude toward the cam carrier 28 side. ing. Further, a mountain-shaped protrusion 52 is formed at one end 40a in the longitudinal direction (left-right direction in FIG. 2) of the adjuster support member 40 so as to protrude toward the cam carrier 28 side.

図３は、カムキャリア２８とアジャスタ支持部材４０との締結構造を説明するための図である。
図３に示すように、アジャスタ支持部材４０が備える山状の突起部５０＃１２、５０＃２３、５０＃３４、５２は、締結ボルト５４によって、カムキャリア２８にそれぞれ固定されている。 FIG. 3 is a view for explaining a fastening structure between the cam carrier 28 and the adjuster support member 40.
As shown in FIG. 3, the mountain-shaped protrusions 50 # 12, 50 # 23, 50 # 34, 52 included in the adjuster support member 40 are fixed to the cam carrier 28 by fastening bolts 54, respectively.

以上説明した本実施形態の構成によれば、アジャスタ支持部材４０における気筒間の部位（連結部４４）および端部４０ａに、カムキャリア２８を利用して高剛性部位を設けることができるので、アジャスタ支持部材４０の剛性を高く確保することができる。これにより、動弁系の剛性を効果的に向上させることができる。また、その結果として、バルブの異常運動の発生回転数をより高くすることができるので、許容最高回転数が高く設定される高回転型の内燃機関に対して、本実施形態のようにラッシュアジャスタ３８をアジャスタ支持部材４０を介してシリンダヘッド１２に搭載する構成を良好に適用することが可能となる。   According to the configuration of the present embodiment described above, the high rigidity portion can be provided by using the cam carrier 28 at the portion (connecting portion 44) between the cylinders and the end portion 40a of the adjuster support member 40. High rigidity of the support member 40 can be ensured. Thereby, the rigidity of a valve operating system can be improved effectively. As a result, the rotational speed at which the abnormal movement of the valve is generated can be further increased. Therefore, the lash adjuster as in the present embodiment is applied to a high-rotation internal combustion engine in which the allowable maximum rotational speed is set high. It is possible to satisfactorily apply a configuration in which 38 is mounted on the cylinder head 12 via the adjuster support member 40.

また、上記の構成とは異なり、カムキャリアとシリンダヘッドとの締結箇所をシリンダヘッドの中央に設ける場合には、鋳造時の湯流れを考慮するとシリンダヘッド側に太めのリブを設ける必要が生じ、シリンダヘッドの軽量化の妨げとなっている。その理由は、シリンダヘッドの上面には、廃止または移動が困難な水穴プラグがあるため、上記リブを付けざるを得ないからである。これに対し、本実施形態の構成によれば、水穴プラグの上において、シリンダヘッド１２にアジャスタ支持部材４０を組み付けることができるので、上記リブを廃止することができ、シリンダヘッド１２を効果的に軽量化することができる。   In addition, unlike the above configuration, when the fastening portion between the cam carrier and the cylinder head is provided in the center of the cylinder head, it is necessary to provide a thick rib on the cylinder head side in consideration of the hot water flow during casting, This hinders weight reduction of the cylinder head. The reason is that there is a water hole plug on the upper surface of the cylinder head that is difficult to eliminate or move, and thus the ribs must be attached. On the other hand, according to the configuration of the present embodiment, the adjuster support member 40 can be assembled to the cylinder head 12 above the water hole plug, so that the rib can be eliminated and the cylinder head 12 can be effectively used. Can be reduced in weight.

ところで、上述した実施の形態１においては、各連結部４４＃１２、４４＃２３、４４＃３４と、アジャスタ支持部材４０の一方の端部４０ａに、山状の突起部５０＃１２、５０＃２３、５０＃３４、５２を備えるようにしている。しかしながら、本発明における山状の突起部の配置部位および配置の態様は、上記のものに限定されるものではない。すなわち、例えば、上記連結部４４および上記端部４０ａの双方でなくても、何れか一方に同様の山状の突起部を備えるようにしてもよい。また、上記端部４０ａに代え、或いは上記端部４０ａとともに、アジャスタ支持部材４０における長手方向の他方の端部に、山状の突起部を備えるようにしてもよい。更には、山状の突起部５０は、すべての連結部４４＃１２、４４＃２３、＃３４に必ずしも備えられていなくてもよく、少なくとも１つの連結部４４に備えられたものであってもよい。   By the way, in Embodiment 1 mentioned above, it is mountain-shaped protrusion part 50 # 12, 50 # in each connection part 44 # 12, 44 # 23, 44 # 34 and one edge part 40a of the adjuster support member 40. 23, 50 # 34, 52. However, the arrangement | positioning site | part and arrangement | positioning aspect of the mountain-shaped projection part in this invention are not limited to the above thing. That is, for example, a similar mountain-shaped protrusion may be provided on either one of the connecting portions 44 and the end portion 40a. Moreover, it may replace with the said edge part 40a, and you may make it provide a mountain-shaped projection part in the other edge part of the longitudinal direction in the adjuster support member 40 with the said edge part 40a. Furthermore, the mountain-shaped protrusion 50 does not necessarily have to be provided in all the connecting portions 44 # 12, 44 # 23, and # 34, and may be provided in at least one connecting portion 44. Good.

尚、上述した実施の形態１において、アジャスタ挿入穴４６ａ〜４６ｄが前記第１の発明における「支持部」に、点火プラグチューブ４８が前記第１の発明における「プラグ収容筒」に、それぞれ相当している。   In the first embodiment described above, the adjuster insertion holes 46a to 46d correspond to the “support portion” in the first invention, and the spark plug tube 48 corresponds to the “plug housing cylinder” in the first invention. ing.

１０ 動弁機構
１２ シリンダヘッド
１４ 燃焼室
１６ 吸気ポート
１８ 吸気弁
２０ 排気ポート
２２ 排気弁
２４ 吸気カムシャフト
２６ 排気カムシャフト
２８ カムキャリア
３０ 吸気カム
３２ 排気カム
３４ 吸気ロッカーアーム
３６ 排気ロッカーアーム
３８ 油圧式ラッシュアジャスタ
４０ アジャスタ支持部材
４０ａ アジャスタ支持部材の端部
４２（＃１〜＃４） アジャスタホルダー
４４（＃１２、＃２３、＃３４） 連結部
４６ａ〜４６ｄ アジャスタ挿入穴
４８ 点火プラグチューブ
５０（＃１２、＃２３、＃３４）、５２ 山状の突起部
５４ 締結ボルト DESCRIPTION OF SYMBOLS 10 Valve mechanism 12 Cylinder head 14 Combustion chamber 16 Intake port 18 Intake valve 20 Exhaust port 22 Exhaust valve 24 Intake cam shaft 26 Exhaust cam shaft 28 Cam carrier 30 Intake cam 32 Exhaust cam 34 Intake rocker arm 36 Exhaust rocker arm 38 Hydraulic type Rush adjuster 40 Adjuster support member 40a Adjuster support member end 42 (# 1- # 4) Adjuster holder 44 (# 12, # 23, # 34) Connecting portion 46a-46d Adjuster insertion hole 48 Spark plug tube 50 (# 12 , # 23, # 34), 52 Mountain-shaped projection 54 Fastening bolt

Claims (1)

各気筒に橋渡すようにシリンダヘッド上に配置され、当該各気筒に配置されたラッシュアジャスタを支持するアジャスタ支持部材を備え、
前記アジャスタ支持部材は、
気筒毎に備えられ、前記シリンダヘッドを燃焼室の軸線方向から見た四隅に前記ラッシュアジャスタを支持する支持部を備え、当該軸線方向から見た中央に点火プラグを収容するプラグ収容筒を備えるアジャスタホルダーと、
各気筒の前記アジャスタホルダーを連結する連結部と、を含み、
前記アジャスタ支持部材は、少なくとも１つの前記連結部および当該アジャスタ支持部材における長手方向の少なくとも１つの端部のうちの少なくとも一方に、前記シリンダヘッドに搭載されるカムシャフト支持部材側に向けて突出する山状の突起部を更に含み、
前記山状の突起部は、前記カムシャフト支持部材に締結ボルトによって固定されることを特徴とする内燃機関の動弁機構。 An adjuster support member disposed on the cylinder head so as to bridge to each cylinder, and supporting a lash adjuster disposed in each cylinder,
The adjuster support member is
An adjuster provided for each cylinder, including a support portion for supporting the lash adjuster at four corners when the cylinder head is viewed from the axial direction of the combustion chamber, and a plug accommodating cylinder that accommodates a spark plug at the center viewed from the axial direction. With a holder,
A connecting portion for connecting the adjuster holder of each cylinder,
The adjuster support member protrudes toward at least one of the at least one connecting portion and at least one end portion in the longitudinal direction of the adjuster support member toward a camshaft support member mounted on the cylinder head. It further includes a mountain-shaped protrusion,
The valve operating mechanism for an internal combustion engine, wherein the mountain-shaped protrusion is fixed to the camshaft support member with a fastening bolt.
JP2009061567A 2009-03-13 2009-03-13 Valve mechanism of internal combustion engine Expired - Fee Related JP5088339B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021050722A (en) * 2019-09-26 2021-04-01 ダイハツ工業株式会社 cylinder head

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079141A (en) * 1983-10-04 1985-05-04 Honda Motor Co Ltd Cylinder head for dohc 4-cycle internal-combustion engine
JPS63176611A (en) * 1987-01-14 1988-07-20 Daihatsu Motor Co Ltd Oil feeder in cylinder head for double overhead camshaft type internal combustion engine
JP2003035245A (en) * 2001-07-19 2003-02-07 Ngk Spark Plug Co Ltd Spark plug installing structure
JP2006161655A (en) * 2004-12-06 2006-06-22 Otics Corp Lash adjuster
JP2006161656A (en) * 2004-12-06 2006-06-22 Otics Corp Cylinder head
JP2008255874A (en) * 2007-04-04 2008-10-23 Honda Motor Co Ltd Variable valve gear for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079141A (en) * 1983-10-04 1985-05-04 Honda Motor Co Ltd Cylinder head for dohc 4-cycle internal-combustion engine
JPS63176611A (en) * 1987-01-14 1988-07-20 Daihatsu Motor Co Ltd Oil feeder in cylinder head for double overhead camshaft type internal combustion engine
JP2003035245A (en) * 2001-07-19 2003-02-07 Ngk Spark Plug Co Ltd Spark plug installing structure
JP2006161655A (en) * 2004-12-06 2006-06-22 Otics Corp Lash adjuster
JP2006161656A (en) * 2004-12-06 2006-06-22 Otics Corp Cylinder head
JP2008255874A (en) * 2007-04-04 2008-10-23 Honda Motor Co Ltd Variable valve gear for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021050722A (en) * 2019-09-26 2021-04-01 ダイハツ工業株式会社 cylinder head
JP7296291B2 (en) 2019-09-26 2023-06-22 ダイハツ工業株式会社 cylinder head

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