JPH0378552A - Cylinder head structure of internal combustion engine - Google Patents
Cylinder head structure of internal combustion engineInfo
- Publication number
- JPH0378552A JPH0378552A JP21256189A JP21256189A JPH0378552A JP H0378552 A JPH0378552 A JP H0378552A JP 21256189 A JP21256189 A JP 21256189A JP 21256189 A JP21256189 A JP 21256189A JP H0378552 A JPH0378552 A JP H0378552A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- integrally
- boss part
- cylinder head
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 21
- 230000037431 insertion Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 101100491149 Caenorhabditis elegans lem-3 gene Proteins 0.000 description 1
- 208000012661 Dyskinesia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、所謂Ｄｏ）ＩＣ型内燃機関のシリンダヘッド
構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the cylinder head structure of a so-called Do) IC type internal combustion engine.
従来の技術
近時自動車用内燃機関にあっては、機関の高出力化の要
請を満足するために、例えば所謂ＤＯＨＣｑが多（採用
されるに至っている一方、車両の軽量化を満足するため
、機関本体の材質をアルミ合金製としたり、あるいは構
造自体を改良するなどの工夫がいろいろなされている。BACKGROUND OF THE INVENTION In recent years, in internal combustion engines for automobiles, in order to satisfy the demand for higher engine output, so-called DOHCq, for example, has been widely used (and has even been adopted). Various innovations have been made, such as making the engine body made of aluminum alloy, or improving the structure itself.
その−例として、シリンダヘッド構造の改良に係る実開
昭６０−９８７４４号公報に記載されているものが知ら
れている。概略を説明すれば、ＤＯＨＣ型内燃機関のシ
リンダヘッドの上部に一対の吸気・排気用のカムシャフ
トを軸受する吸気・排気側カム軸受が形成されていると
共に、シリンダヘッドの吸気側側面下部に吸気マニホル
ドの取付ねじボス部が設けられ、かつ各カム軸受の下面
長手方向に連続した空所が設けられ、更に、吸気側カム
軸受の外側部と吸気マニホルド取付ねしボス部とがリプ
で連結されている。そして、前記空所の形成によって機
関の軽量を、補強リブによって各カム軸受等の剛性を確
保するようになっている。As an example, the one described in Japanese Utility Model Application Laid-Open No. 60-98744 relating to an improvement of the cylinder head structure is known. To explain the outline, an intake/exhaust side cam bearing that supports a pair of intake/exhaust camshafts is formed in the upper part of the cylinder head of a DOHC type internal combustion engine, and an intake/exhaust side cam bearing is formed in the lower part of the intake side side of the cylinder head. A mounting screw boss portion of the manifold is provided, and a continuous space is provided in the longitudinal direction of the lower surface of each cam bearing.Furthermore, the outer portion of the intake side cam bearing and the intake manifold mounting screw boss portion are connected with a lip. ing. Furthermore, the formation of the void spaces ensures the lightweight of the engine, and the reinforcing ribs ensure the rigidity of each cam bearing, etc.
発明が解決しようとする課題
然し乍ら、前記従来のシリンダヘッド構造にあっては、
吸気側カム軸受と吸気マニホルド取付ねじボス部との距
離が大きく離れていると共に、該両者の間に大きな軽量
化用空所が形成されているため、補強リブだけでは前記
取付ねじボス部に対する吸気マニホルドの支持剛性を十
分に確保することができない。Problems to be Solved by the Invention However, in the conventional cylinder head structure,
There is a large distance between the intake side cam bearing and the intake manifold mounting screw boss, and a large space for weight reduction is formed between them. It is not possible to ensure sufficient support rigidity of the manifold.
また、吸気側カム軸受と排気側カム軸受が、何らの関連
を有さず互いに左右に分離独立した形で形成されている
ため、該両カム軸受の剛性が低下する。したがって、前
述の吸気マニホルドの支持剛性の低下と相俟って機関高
出力化による動弁系の高回転速度に追従できず、特に機
関巾方向（聞き方向）の引張り荷重による変形が太き（
なり、カムシャフトの安定した軸受作用が得られず動弁
系の異常運動を招く虞があるばかりか、大きな振動騒音
が発生し易くなるといった問題がある。Further, since the intake side cam bearing and the exhaust side cam bearing have no relation to each other and are formed separately and independently from each other on the left and right sides, the rigidity of both the cam bearings is reduced. Therefore, together with the above-mentioned decrease in support rigidity of the intake manifold, it is not possible to follow the high rotational speed of the valve train due to the increase in engine output, and deformation due to tensile load in the engine width direction (width direction) is large (
Therefore, there is a problem that not only a stable bearing action of the camshaft cannot be obtained and abnormal movement of the valve train may occur, but also large vibration noise is likely to be generated.
課題を解決するための手段
本発明は、前記従来の問題点に鑑みて案出されたもので
、とりわけ吸気側側壁の吸気マニホルド取付ねじボス部
を吸気側カム軸受と一体にすると共に、前記吸気側カム
軸受と排気側カム軸受とを梁部材を介して機関巾方向に
連結したことを特徴としている。Means for Solving the Problems The present invention was devised in view of the above-mentioned conventional problems, and in particular, integrates the intake manifold mounting screw boss portion of the intake side side wall with the intake side cam bearing, and It is characterized in that the side cam bearing and the exhaust side cam bearing are connected in the width direction of the engine via a beam member.
作用
本発明によれば、吸気側カム軸受と吸気側側壁の吸気マ
ニホルド取付ねじボス部とを一体に結合したため、吸気
側カム軸受と取付ねじボス部付近の結合剛性が向上し、
吸気マニホルドに対する高い支持剛性が確保できる。ま
た、梁部材により両カム軸受の剛性が高（なり、ひいて
は前記取付ねじボス部の剛性２強度が一層向上すると共
に、特に機関巾方向の引張り荷重による変形を十分に抑
制できる。According to the present invention, since the intake side cam bearing and the intake manifold mounting screw boss portion of the intake side side wall are integrally connected, the joint rigidity of the vicinity of the intake side cam bearing and the mounting screw boss portion is improved.
High support rigidity for the intake manifold can be ensured. Furthermore, the beam member increases the rigidity of both cam bearings, thereby further improving the rigidity and strength of the mounting screw boss portion, and can sufficiently suppress deformation due to tensile loads, especially in the width direction of the engine.
実施例
本発明に係るシリンダヘッド構造は、第１図〜第５図に
示すように構成され、ＤＯＨＣＯＨＣ型内気筒内燃適用
したものである。Embodiment The cylinder head structure according to the present invention is constructed as shown in FIGS. 1 to 5, and is applied to a DOHCOHC type internal combustion cylinder.
すなわち、このシリンダヘッドｌは、アルミ合金で一体
に形成され、図中２はシリンダブロック（図示せず）の
上端に載置固定されるロアデツキ、３は上端に図外のロ
ッカカバーが載置固定されるアッパフランジ、４はロア
デツキ２の上部に有するアッパデツキ、５は略垂直状の
下部５ａと上方へ拡開状に傾斜した上部５ｂとからなる
吸気側側壁、６は略垂直状の下部６ａと上方へ拡開状に
傾斜した上部６ｂとからなる排気側側壁であって、前記
ロアデツキ２．アッパデツキ４．吸気側側壁５、排気側
側壁６によって全体が略箱状に形成されていると共に、
内部にはつ寸−クジャケット７が形成されている。また
、アッパデツキ４の上部には、前記吸気側、排気側側壁
５，６の各上部５ｂ、６ｂと機関前後端側上壁８，９で
画成される動弁室１０が形成されている。That is, this cylinder head l is integrally formed of aluminum alloy, and in the figure, 2 is a lower deck that is placed and fixed on the upper end of a cylinder block (not shown), and 3 is a rocker cover (not shown) that is placed and fixed on the upper end. 4 is an upper deck provided at the upper part of the lower deck 2; 5 is an intake side side wall consisting of a substantially vertical lower part 5a and an upwardly expanding upper part 5b; 6 is a substantially vertical lower part 6a; An exhaust side side wall consisting of an upper part 6b that is inclined upwardly in a widening manner, and the lower deck 2. Upper deck 4. The whole is formed into a substantially box shape by the intake side wall 5 and the exhaust side side wall 6, and
A diagonal jacket 7 is formed inside. Further, in the upper part of the upper deck 4, a valve operating chamber 10 is formed, which is defined by the upper parts 5b, 6b of the intake side and exhaust side walls 5, 6, and the engine front and rear end side upper walls 8, 9.
前記動弁室１０内には、アッパデツキ４の上面略中央長
手方向に図外のロッカカバーの取付面を構成するボス部
１１・・・が等間隔で設けられており、この中央２つの
ボス部１１．１１ｉＪＪに、ロッカカバー取付用ねじボ
ス部１２が立設されている。また、アッパデツキ４の上
部両側には、複数の吸気ｍ、 排気側カム軸受１３．１
４・・・のロアホルダ１３ａ、１４ａ・・・がア・ノパ
デブキ４から立ち上がった脚部４ａと吸気、排気側両側
壁５，６に夫々支持されており、このロアホルダ１３ａ
、１４ａ・・・は、半円形の軸受面１３ｂ、１４ｂ・・
・で図外のアッパホルダと共に、機関前後方向に並設さ
れる図外の吸気、排気用カムシャフトを軸受するように
なっている。この各ロアホルダ１３ａ、１４ａ・・・の
各軸受面１３ｂ、１４ｂ・・・には、シリンダブロック
にシリンダへラド１を取り付けるヘッドボルト１５の脱
着作業用の挿通孔１６・・・が形成されており、その下
方には、該挿通孔１６と連続するボルト挿通孔１７ａが
ボス部１７の上下方向に貫通形成されている。このボス
部１７は、吸気、排気側側壁５，６の各下部５ａ、６ａ
と一体にロアデツキ２とアッパデツキ４とを連結してい
る。また、前記軸受面１３ｂ、１４ｂ・・・の両側にア
ッパホルダ取付用のねじ孔１８．１９が垂直方向に穿設
されている。Inside the valve operating chamber 10, boss portions 11 constituting a mounting surface for a rocker cover (not shown) are provided at equal intervals in the longitudinal direction approximately at the center of the upper surface of the upper deck 4, and the two central boss portions At 11.11iJJ, a screw boss portion 12 for attaching a rocker cover is provided upright. In addition, on both sides of the upper deck 4, there are a plurality of intake m and exhaust side cam bearings 13.1.
Lower holders 13a, 14a, .
, 14a... are semicircular bearing surfaces 13b, 14b...
・Along with an upper holder (not shown), it supports the intake and exhaust camshafts (not shown) that are arranged in parallel in the longitudinal direction of the engine. In each of the bearing surfaces 13b, 14b, of the lower holders 13a, 14a, an insertion hole 16 for attaching and removing a head bolt 15 for attaching the cylinder rad 1 to the cylinder block is formed. A bolt insertion hole 17a continuous with the insertion hole 16 is formed below the boss portion 17 in the vertical direction. This boss portion 17 is located at the lower portions 5a, 6a of the intake and exhaust side walls 5, 6.
The lower deck 2 and upper deck 4 are integrally connected to each other. Further, screw holes 18 and 19 for attaching an upper holder are vertically bored on both sides of the bearing surfaces 13b, 14b, . . . .
更に、前記吸気側ロアホルダ１３ａ・・・と排気側ロア
ホルダ１４ａ・・・は、対向する中央側及び後端側が前
記ねじボス部１２等の左右方向に連続一体に立設された
第１梁部材２０で一体に連結され、また、ねじボス部１
２の両側が前記ロッカカバー取付用ボスｉｌｌ・・・を
介して略菱形に立設された複数の第２梁部材２１・・・
によって夫々機関中方向に一体に連結されている。そし
て、各ロアホルダ１３ａ、１４ａの各外側部１３ｃ、１
４ｃは、前記吸気側、排気側側壁５，６に連続一体に結
合されている。Furthermore, the intake side lower holders 13a... and the exhaust side lower holders 14a... have opposing central and rear end sides of a first beam member 20 that is continuously and integrally erected in the left-right direction of the screw boss portion 12, etc. The threaded boss portion 1
A plurality of second beam members 21 . . . each side of the second beam members 21 are erected in a substantially diamond shape through the rocker cover mounting boss ill . . .
They are each integrally connected in the direction of the engine. And each outer part 13c, 1 of each lower holder 13a, 14a
4c is continuously and integrally connected to the intake and exhaust side walls 5 and 6.
一方、前記吸気側側壁５には、吸気ポート２２が下部５
ａからＬ部５ｂ側へ傾斜状に突設されていると共に、こ
の吸気ポート２２の先端に吸気マニホルド取付用の７ラ
ンジ状の取付部２４が一体に設けられている。この取付
部２４は、吸気マニホルド２５の上方湾曲状の各ブラン
チ２６・・・の先端に有する取付フランジ部２７・・・
がボルト２８・・・により接続されるようになっており
、この上端部２４ａ・・・には吸気マニホルド取付取付
ねじボス部２３・・・が前記吸気側ロアホルダ１３ａ・
・・の位置する吸気側側壁５上部５ｂに十分な連結断面
積をもって連続かつ一体に連結されている。また、吸気
ポート２２の外側面上下方向には、前記取付部２４の下
端部２４ｂとロアデツキ２とを結ぶ略ハ字形の一対の補
強リブ２９，２９・・・が夫々一体に設けられている。On the other hand, an intake port 22 is provided in the lower part 5 of the intake side wall 5.
The intake port 22 is provided in an inclined manner protruding from a toward the L portion 5b, and is integrally provided with a seven-lung-shaped attachment portion 24 for attaching an intake manifold at the tip of the intake port 22. The mounting portion 24 is a mounting flange portion 27 provided at the tip of each upwardly curved branch 26 of the intake manifold 25.
are connected by bolts 28..., and the intake manifold mounting screw boss portion 23... is connected to the upper end portion 24a... of the intake side lower holder 13a...
. . are continuously and integrally connected to the upper portion 5b of the intake side wall 5 with a sufficient connection cross-sectional area. Further, a pair of substantially V-shaped reinforcing ribs 29, 29, .
尚、取付部２４のト下端部２４ａ。Note that the lower end portion 24a of the mounting portion 24.
２４ｂには、前記ボルト２８が挿通するボルト孔２４Ｃ
・・・が穿設されている。24b has a bolt hole 24C through which the bolt 28 is inserted.
... has been drilled.
前記排気側側壁６は、前記吸気側側壁５と略対称形状に
形成されており、上部６ｂと前記排気側ロアホルダ１４
ａ・・・の外側部が連結されている。The exhaust side side wall 6 is formed in a substantially symmetrical shape with the intake side side wall 5, and has an upper part 6b and the exhaust side lower holder 14.
The outer parts of a... are connected.
更にまた、ンリンダヘッドＩ内には、シリンダブロック
内から動弁機構に潤滑油を供給する油供給回路３０が形
成されている。この油供給回路３０は、第４図に示すよ
うに吸気側、排気側に略対称に形成されており、前記ヘ
ッドボルトＬ５とボルト挿通孔１７ａとの間に形成され
て、シリンダブロック内のメインギヤラリと連通ずる第
１油通路３１と、ア・ノパデブキ４の上部内に横方同に
沿って穿設されて、第１油通路３１内に流入した潤滑油
を矢印で示すように左右に分岐させる第２油通路３２と
、該第２油通路３２の両端部から、各側壁５，６の上部
５ｂ、６ｂ内を斜め上方向に設けられた第３油通路３３
と、上部５ｂ、６ｂ内に機関長手方向に穿設されて、前
記第３油通路３３から導入された油を各小孔３４ａを介
して軸受面１３ｂ、１４ｂに供給する第４油通路３４と
、第３油通路３３と略並行に形成されて、第４油通路３
４内の油を取り出す第５油通路３５（第５図参照）と、
前記アッパデツキ４と各１−．ｔ？５ｂ、６ｂとの隅部
近傍に機関長手方向に沿って設けられて、第５油通路３
５内の油をエンドピボット式うブシコアジャスタに供給
する第６油通路３６とを備えている。尚、図中３７・・
・は各油通路の一端を閉１卜する盲栓である。Furthermore, an oil supply circuit 30 is formed within the cylinder head I for supplying lubricating oil to the valve mechanism from within the cylinder block. As shown in FIG. 4, this oil supply circuit 30 is formed approximately symmetrically on the intake side and the exhaust side, and is formed between the head bolt L5 and the bolt insertion hole 17a, and is connected to the main gear in the cylinder block. A first oil passage 31 that communicates with the lubricant and a first oil passage 31 are drilled horizontally in the upper part of the anopadet 4, and the lubricating oil that has flowed into the first oil passage 31 is branched left and right as shown by the arrows. and a third oil passage 33 provided obliquely upward in the upper portions 5b, 6b of each side wall 5, 6 from both ends of the second oil passage 32.
and a fourth oil passage 34 which is bored in the longitudinal direction of the engine in the upper parts 5b and 6b and supplies the oil introduced from the third oil passage 33 to the bearing surfaces 13b and 14b through each small hole 34a. , is formed substantially parallel to the third oil passage 33, and the fourth oil passage 3
a fifth oil passage 35 (see Fig. 5) for taking out the oil in 4;
The upper deck 4 and each 1-. T? A fifth oil passage 3 is provided along the longitudinal direction of the engine near the corner between 5b and 6b.
5 and a sixth oil passage 36 for supplying the oil in the end pivot type bush core adjuster. In addition, 37 in the figure...
* is a blind plug that closes one end of each oil passage.
以下、本実施例の作用について説明する。すなわち、こ
の実施例によればシリンダヘッドの側壁５に設けた吸気
マニホルド取付部２４・・・上端部２４ａ・・・の吸気
マニホルド取付ねしボス部２３・・・を、吸気側ロアホ
ルダ１３ａ・・・に形成したアッパホルダ取付用ねじ孔
１８部と一体に連結したため、取付部２４・・・特に取
付ねじボス部２３・・・の剛性が向上して吸気マニホル
ド２５に対する支持剛性及び強度も向上する。このため
、吸気マニホルド２５の伝播振動や該振動に起因する騒
音等を十分に低減できると共に、耐久性が向上する。The operation of this embodiment will be explained below. That is, according to this embodiment, the intake manifold attachment boss portions 23 of the upper end portions 24a of the intake manifold attachment portions 24 provided on the side wall 5 of the cylinder head are connected to the intake side lower holder 13a. Since it is integrally connected to the upper holder mounting screw hole 18 formed in , the rigidity of the mounting portion 24, especially the mounting screw boss portion 23, is improved, and the support rigidity and strength for the intake manifold 25 are also improved. Therefore, propagated vibrations of the intake manifold 25 and noise caused by the vibrations can be sufficiently reduced, and durability is improved.
しかも、吸気側のロアホルダ１３ａ・・・と排気側のロ
アホルダ１４ａ・・・とを、第１梁部材２０や第２梁部
材２１・・・によって一体的に連結したため、両カム軸
受の剛性が向ヒし、特に機関中方向の荷重による開き変
形や振動を効果的に抑制できる。Moreover, since the lower holders 13a on the intake side and the lower holders 14a on the exhaust side are integrally connected by the first beam member 20 and the second beam member 21, the rigidity of both cam bearings is improved. In particular, opening deformation and vibration caused by loads in the engine direction can be effectively suppressed.
したがって、斯かる両ロアホルダ１３ａ、１４ａの結合
剛性の同上により、ロアホルダ１３ａの外側部１３ｃに
連結された前記取付部２４の剛性、強度がさらに高くな
り吸気マニホルド２５の支持剛性と強度が一層向−ヒす
ると共に、カムシャフトを常時安定かつ確実に軸受する
ことができ、高回転時にも安定した軸受作用が得られる
。Therefore, due to the same increase in joint rigidity between both lower holders 13a and 14a, the rigidity and strength of the mounting portion 24 connected to the outer part 13c of the lower holder 13a are further increased, and the support rigidity and strength of the intake manifold 25 are further improved. At the same time, the camshaft can be supported stably and reliably at all times, and stable bearing action can be obtained even at high rotations.
更に、取付部２４の下端部２４ｂが、補強リブ２９．２
９によって剛性の高いロアデツキ２に結合されて補強さ
れているため、取付部２４等の剛性が更に向として吸気
マニホルド２５に対する支持剛性が一層助長される。Furthermore, the lower end portion 24b of the mounting portion 24 is connected to the reinforcing rib 29.2.
9 is connected to and reinforced by the lower deck 2 with high rigidity, the rigidity of the mounting portion 24 and the like is further increased, and the support rigidity for the intake manifold 25 is further promoted.
また、吸気ボート２２が、略直線状に形成されているた
め、該吸気ボート２２を通流する吸入空気の流動抵抗が
十分に小さくなり、燃焼室への給気効率が向ヒして機関
の出力や燃費を向上させることができる。In addition, since the intake boat 22 is formed in a substantially straight line, the flow resistance of the intake air flowing through the intake boat 22 is sufficiently small, and the efficiency of air supply to the combustion chamber is improved. It can improve output and fuel efficiency.
更にまた、本実施例では、ボルト挿通孔１７ａ及び各油
通路３１，３２，３４．３５を構成するボス部の略格子
構造によって取付部２４・・・に接近して形成された第
４油通路３４を構成するボス部を強固に支持すると共に
、該第４油通路３４のボス部によって取付部２４・・・
を補強するようにしたため、該取付部２４・・・の剛性
２強度がさらに助長される。Furthermore, in this embodiment, the fourth oil passage is formed close to the mounting part 24 by the substantially lattice structure of the boss part that constitutes the bolt insertion hole 17a and each oil passage 31, 32, 34.35. 34, and the boss portion of the fourth oil passage 34 firmly supports the mounting portion 24...
Since the mounting portions 24 are reinforced, the rigidity and strength of the mounting portions 24 are further enhanced.
尚、本発明は、前記実施例の構成に限定されるものでは
ない。Note that the present invention is not limited to the configuration of the above embodiment.
発明の効果
以上の説明で明らかなように、本発明に係る内燃機関の
シリンダへ・フド構造によれば、吸気側カム軸受の外側
部に、吸気側側壁の吸気マニホルド取付ねしボス部とを
一体に連結したため、該取付ねじボス部の剛性が向上し
て、吸気マニホルドに対する支持剛性が十分に向ヒする
。したがって、吸気マニホルドの振動や振動騒音を効果
的に低減できると共に、耐久性の向上が図れる。しかも
吸気側カム軸受と排気側カム軸受が複数の梁部材で一体
に連結されているため、前記取付ねじボス部の支持剛性
がさらに助長されると共に、該両カム軸受の剛性が向上
し、特に機関巾方向（開き方向）への引張り荷重による
変形を十分に抑制することができ、カムシャフトを安定
かつ確実に軸受することができる。この結果、前記吸気
マニホルド等の振動を一層効果的に抑制できると共に、
機関高回転、高出力化の要請を十分に満足する事が可能
になる。Effects of the Invention As is clear from the above explanation, according to the cylinder cover structure of the internal combustion engine according to the present invention, the intake manifold mounting boss portion of the intake side side wall is attached to the outer side of the intake side cam bearing. Since they are integrally connected, the rigidity of the mounting screw boss portion is improved, and the support rigidity for the intake manifold is sufficiently improved. Therefore, vibration and vibration noise of the intake manifold can be effectively reduced, and durability can be improved. Furthermore, since the intake side cam bearing and the exhaust side cam bearing are integrally connected by a plurality of beam members, the supporting rigidity of the mounting screw boss portion is further promoted, and the rigidity of both the cam bearings is improved. Deformation due to a tensile load in the engine width direction (opening direction) can be sufficiently suppressed, and the camshaft can be stably and reliably supported. As a result, vibrations of the intake manifold etc. can be suppressed more effectively, and
It becomes possible to fully satisfy the demands for high engine rotation and high output.
第１図は本発明の一実施例を示すシリンダヘッドの斜視
図、第２図は同シリンダヘッドの平面図、第３図は同シ
リンダヘッドの側面図、第４図は第２図のＡ−Ａ線断面
図、第５図は第２図のＢ−Ｂ線断面図である。
１・・・シリンダヘッド、５・・・吸気側側壁、１３・
・・吸気側カム軸受、１３ａ・・・吸気側ロアホルダ、
１３Ｃ・・・外側部、１４・・・排気側カム軸受、１４
ａ・・・排気側ロアホルダ、２０．２１・・・第１．第
２梁部材、２３・・・取付ねしボス部、２４・・・取付
部、２５・・・吸気マニホルド。
外３名FIG. 1 is a perspective view of a cylinder head showing an embodiment of the present invention, FIG. 2 is a plan view of the same cylinder head, FIG. 3 is a side view of the same cylinder head, and FIG. 4 is an A-- 5 is a sectional view taken along line A and FIG. 5 is a sectional view taken along line BB in FIG. 2. 1... Cylinder head, 5... Intake side side wall, 13.
...Intake side cam bearing, 13a...Intake side lower holder,
13C...Outside part, 14...Exhaust side cam bearing, 14
a...Exhaust side lower holder, 20.21...1st. Second beam member, 23... Mounting boss portion, 24... Mounting portion, 25... Intake manifold. 3 other people
Claims (1)
ャフトを軸受する吸・排気側カム軸受を備えたシリンダ
ヘッド構造において、吸気側側壁の吸気マニホルド取付
ねじボス部を前記吸気側カム軸受と一体に形成すると共
に、前記吸気側カム軸受と排気側カム軸受とを梁部材を
介して機関巾方向に連結したことを特徴とする内燃機関
のシリンダヘッド構造。(1) In a cylinder head structure equipped with an intake/exhaust side cam bearing that supports a pair of intake/exhaust camshafts at the top of the cylinder head, the intake manifold mounting screw boss portion of the intake side side wall is connected to the intake side cam bearing. A cylinder head structure for an internal combustion engine, characterized in that the intake cam bearing and the exhaust cam bearing are integrally formed and connected in the width direction of the engine via a beam member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1212561A JP2676934B2 (en) | 1989-08-18 | 1989-08-18 | Cylinder head structure of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1212561A JP2676934B2 (en) | 1989-08-18 | 1989-08-18 | Cylinder head structure of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0378552A true JPH0378552A (en) | 1991-04-03 |
| JP2676934B2 JP2676934B2 (en) | 1997-11-17 |
Family
ID=16624736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1212561A Expired - Fee Related JP2676934B2 (en) | 1989-08-18 | 1989-08-18 | Cylinder head structure of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2676934B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011169272A (en) * | 2010-02-19 | 2011-09-01 | Daihatsu Motor Co Ltd | Cylinder head structure in multi-cylinder internal combustion engine |
| WO2016111021A1 (en) * | 2015-01-06 | 2016-07-14 | 愛知機械工業株式会社 | Cylinder head, internal combustion engine equipped with same, and cylinder head manufacturing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117162U (en) * | 1984-07-04 | 1986-01-31 | マツダ株式会社 | Cylinder head structure of DOHC engine |
| JPS61181844U (en) * | 1985-04-30 | 1986-11-13 | ||
| JPS61279710A (en) * | 1985-06-06 | 1986-12-10 | Honda Motor Co Ltd | Internal-combustion engine |
| JP3017245U (en) * | 1995-03-23 | 1995-10-24 | 株式会社矢田製作所 | Liquid purifier |
-
1989
- 1989-08-18 JP JP1212561A patent/JP2676934B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117162U (en) * | 1984-07-04 | 1986-01-31 | マツダ株式会社 | Cylinder head structure of DOHC engine |
| JPS61181844U (en) * | 1985-04-30 | 1986-11-13 | ||
| JPS61279710A (en) * | 1985-06-06 | 1986-12-10 | Honda Motor Co Ltd | Internal-combustion engine |
| JP3017245U (en) * | 1995-03-23 | 1995-10-24 | 株式会社矢田製作所 | Liquid purifier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011169272A (en) * | 2010-02-19 | 2011-09-01 | Daihatsu Motor Co Ltd | Cylinder head structure in multi-cylinder internal combustion engine |
| WO2016111021A1 (en) * | 2015-01-06 | 2016-07-14 | 愛知機械工業株式会社 | Cylinder head, internal combustion engine equipped with same, and cylinder head manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2676934B2 (en) | 1997-11-17 |
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