JPH0267448A - Structure of cam chamber of internal combustion engine - Google Patents

Structure of cam chamber of internal combustion engine

Info

Publication number
JPH0267448A
JPH0267448A JP21766188A JP21766188A JPH0267448A JP H0267448 A JPH0267448 A JP H0267448A JP 21766188 A JP21766188 A JP 21766188A JP 21766188 A JP21766188 A JP 21766188A JP H0267448 A JPH0267448 A JP H0267448A
Authority
JP
Japan
Prior art keywords
cylinder head
cam
head cover
internal combustion
combustion engine
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.)
Pending
Application number
JP21766188A
Other languages
Japanese (ja)
Inventor
Hideo Fujiwara
秀雄 藤原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP21766188A priority Critical patent/JPH0267448A/en
Publication of JPH0267448A publication Critical patent/JPH0267448A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members

Abstract

PURPOSE:To miniaturize an internal combustion engine and improve the maintenance and service capability of the engine by mounting a cam pulley near a cylinder head and dividing a cylinder head cover into upper and lower covers to make it into two layer structure. CONSTITUTION:The cam shaft of a tappet valve 10 is arranged in a cam chamber 6 in the longitudinal direction X of an internal combustion engine 2, and one end section 14 of the cam shaft 12 is fixed by a cam pulley 16. A cylinder head cover 8 is composed of a lower head cover 24 to be directly placed on the top of a cylinder head and an upper head cover 26 to be placed on the lower head cover 24. In addition, the lower head cover 24 is provided with a plurality of cam paps 28 arranged spacedly and in nearly crossing relationship to the longitudinal direction X of the internal combustion engine 2 to rotatably support a cam shaft 12 working together with the cylinder head.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は内燃機関のカム室構造に係り、特にカムプー
リをシリンダヘッドに近接させて内燃機関の小型化を図
るとともに、整備性を損なうことのない内燃機関のカム
室構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cam chamber structure for an internal combustion engine, and in particular, it aims at downsizing the internal combustion engine by bringing the cam pulley close to the cylinder head, and at the same time, prevents the deterioration of maintainability. Regarding the cam chamber structure of an internal combustion engine.

〔従来の技術〕[Conventional technology]

内燃機関は、シリンダヘッド側にシリンダヘッドを載置
して固定し、また、このシリンダヘッド上部にシリンダ
ヘッドカバーを固定してカム軸等の動弁機構を配置する
カム室を形成して構成されている。また、カム軸の一端
側には、クランク軸に固定したクランクプーリに連絡す
るベルトを巻掛けるカムプーリを固定している。An internal combustion engine is constructed by mounting and fixing a cylinder head on the cylinder head side, and fixing a cylinder head cover to the top of the cylinder head to form a cam chamber in which a valve mechanism such as a camshaft is placed. There is. Furthermore, a cam pulley is fixed to one end of the camshaft, and a belt connected to the crank pulley fixed to the crankshaft is wound around the cam pulley.

上述のシリンダへ７ドカバーの構造としては、例えば実
開昭５９−９８１９８号公報および実開昭５９〜１３３
８９４号公報に開示されている。The structure of the above-mentioned cylinder cover is disclosed in, for example, Japanese Utility Model Application Publication No. 59-98198 and Japanese Utility Model Application No. 59-133.
It is disclosed in Japanese Patent No. 894.

実開昭５９〜９８１９８号公報に記載のものは、シリン
ダヘッドカバーであるカムハウジングに一定距離で複数
の軸受部を配設し、各軸受部には軸受孔を設けた構成を
有している。また、実開昭５９−１３３８９４号公報に
記載のものは、シリンダヘッドカバーを上部へ７ドカバ
ーと下部ヘンドカバーとに分割するとともに、上部ヘン
ドカパーと下部ヘッドカバーとのシールを良好に果すも
のである。The device described in Japanese Utility Model Application Publication No. 59-98198 has a configuration in which a plurality of bearing portions are arranged at a constant distance from a cam housing, which is a cylinder head cover, and each bearing portion is provided with a bearing hole. Furthermore, the cylinder head cover disclosed in Japanese Utility Model Application Publication No. 59-133894 is divided into an upper hend cover and a lower hend cover, and the upper hend cover and the lower head cover are effectively sealed.

また、カム室内の構造としては、例えば実開昭５９−１
８９９９３号公報及び実開昭６２−１４１６０３号公報
に開示されている。実開昭５９１８９９９３号公報に記
載のものは、シリンダヘッドカバーに形成した開口から
ヘッドボルトの操作を可能としたものである。また、実
開昭６２−１４１６０３号公報に記載のものは、カム軸
をシリンダヘッドとカム軸ハウジングとに一体的に設け
たリブ部分に二つ割りの軸受部を設け、この軸受は部に
カム軸を支持させる構成である。In addition, as for the structure inside the cam chamber, for example,
This method is disclosed in Japanese Unexamined Patent Publication No. 89993 and Japanese Utility Model Application Publication No. 141603/1989. The one described in Japanese Utility Model Application Publication No. 59189993 allows the head bolt to be operated through an opening formed in the cylinder head cover. Furthermore, in the device described in Japanese Utility Model Application Publication No. 141603/1983, a camshaft is provided integrally with the cylinder head and the camshaft housing, and a split bearing part is provided in the rib part, and this bearing has a camshaft in the part. This is a supporting configuration.

更に、カムプーリの取付構造としては、第８．９図に示
すものがある。即ち、第８．９図に示す如く、カムプー
リ１０２がカム軸１０４の一端部１０６に取付けられ、
またカム軸１０４がカムキャップ１０８とシリンダヘッ
ド１１０とによって回転可能に取付けられ、さらにシリ
ンダヘッド１１０上部にはシリンダヘッドカバー１１２
が固定されている。この第８．９図において、シリンダ
ヘッドカバー１１２の着脱を容易に行わせるために、カ
ムブーＩ７１０２のリム１１４の一側である内側リム部
１１６の端面１１８とシリンダヘッド２１０の端面１２
０との間には、所定の間隙Ｓが形成されている。なお、
第８．９図において符号１２２はカムキャップ１０８を
支持する支持用ボルトである。Further, as a mounting structure for the cam pulley, there is one shown in FIG. 8.9. That is, as shown in FIG. 8.9, a cam pulley 102 is attached to one end 106 of a camshaft 104,
Further, a camshaft 104 is rotatably attached to a cam cap 108 and a cylinder head 110, and a cylinder head cover 112 is mounted above the cylinder head 110.
is fixed. In FIG. 8.9, in order to easily attach and detach the cylinder head cover 112, an end surface 118 of the inner rim portion 116, which is one side of the rim 114 of the Cambu I7102, and an end surface 12 of the cylinder head 210 are shown.
0, a predetermined gap S is formed between the two. In addition,
In FIG. 8.9, reference numeral 122 is a support bolt that supports the cam cap 108.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

ところが、従来のカムプーリの取付構造においては、カ
ムブーりがシリンダヘッドの端面から所定距離だけ離間
して取付けられているので、内燃機関の全長が大きくな
り、重量が増大するとともに内燃機関が大型になるとい
う不都合を招いた。However, in the conventional cam pulley mounting structure, the cam pulley is mounted a predetermined distance from the end face of the cylinder head, which increases the overall length of the internal combustion engine, increases its weight, and makes it larger. This caused an inconvenience.

この不都合を解消するために、カムプーリのリムの一例
をカムキャップ及びシリンダヘッドに近接して設け、つ
まり組立時にカムプーリを最後に取付用ボルトでカム軸
に取付けた場合には、タペットクリアランス等の動弁機
構の保守点検の際に、シリンダヘッドカバーを取外すべ
（シリンダヘッドカバーを上方に移動させると、このシ
リンダヘッド力バーがカムプーリのリムの一例に接触す
る一方、シリンダヘッドカバーをカムプーリのリムに接
触しないようにカム軸の長平方向に移動させると、シリ
ンダヘッドカバーがカムキャップに接触し、このため、
シリンダヘッドカバーの取外しが困難となり、整備性・
サービス性が損われるという不都合が生じた。In order to eliminate this inconvenience, the rim of the cam pulley is installed close to the cam cap and the cylinder head.In other words, if the cam pulley is attached to the camshaft using the mounting bolt last during assembly, the movement of the tappet clearance etc. During maintenance and inspection of the valve mechanism, the cylinder head cover must be removed (when the cylinder head cover is moved upward, this cylinder head force bar contacts one example of the rim of the cam pulley, while the cylinder head cover does not touch the rim of the cam pulley). When the camshaft is moved in the longitudinal direction, the cylinder head cover comes into contact with the cam cap, and as a result,
It becomes difficult to remove the cylinder head cover, which reduces maintainability.
This caused an inconvenience in that service quality was impaired.

〔発明の目的〕[Purpose of the invention]

そこでこの発明の目的は、上述の不都合を除去すべ（、
カムプーリをシリンダヘッドに近接させて取付けるとと
もにシリンダヘッドカバーを上下に分割して二層構造と
することにより、内燃機関の小型化を図り得て、しかも
上側のシリンダヘッドカバーを容易に取外してカムプー
リにベルト等の伝動具を巻き掛けた状態でタペットクリ
アランス等の保守点検を果して整備性・サービス性を損
なうことのない内燃機関のカム室構造を実現するにある
。Therefore, the purpose of this invention is to eliminate the above-mentioned disadvantages (
By installing the cam pulley close to the cylinder head and dividing the cylinder head cover into upper and lower parts to create a two-layer structure, it is possible to downsize the internal combustion engine, and the upper cylinder head cover can be easily removed to attach the belt to the cam pulley. To provide a cam chamber structure for an internal combustion engine that allows maintenance and inspection of tappet clearance, etc., to be carried out with the transmission gear wrapped around it without impairing maintainability and serviceability.

〔問題点を解決するための手段〕[Means for solving problems]

この目的を達成するためにこの発明は、内燃機関シリン
ダヘッドに配置したカム軸の一端側に固定するカムプー
リのリムの一側が前記シリンダヘッドに重合すべく前記
カムプーリを前記シリンダヘッド側に近接させて前記カ
ム軸に設け、前記シリンダヘッド上部に固定するシリン
ダヘッドカバーを上部ヘッドカバーと下部へ７ドカバー
とに分割するとともにこの下部ヘッドカバーには前記シ
リンダヘッドと共働して前記カム軸を支持するカムキャ
ップを一体に形成したことを特徴とする。In order to achieve this object, the present invention provides a method in which the cam pulley is fixed to one end of a camshaft disposed in the cylinder head of an internal combustion engine, and the cam pulley is moved close to the cylinder head so that one side of the rim overlaps the cylinder head. A cylinder head cover provided on the camshaft and fixed to the upper part of the cylinder head is divided into an upper head cover and a lower cover, and the lower head cover includes a cam cap that cooperates with the cylinder head to support the camshaft. It is characterized by being formed in one piece.

〔作用〕[Effect]

この発明の構成によれば、カムプーリのリムの一側がシ
リンダヘッドに重合している状態において、上部ヘッド
カバーをカム軸の長平方向に移動させることができ、こ
の上部ヘッドカバーの着脱を容易に果し得る。これによ
り、カム軸にカムプーリを取付は且つカムプーリに伝動
具を巻掛けた状態で保守点検を果し得て、整備性・サー
ビス性が損われることがない。また、カムプーリがシリ
ンダヘッドに近接して設けられているので、内燃機関の
全長を小とし、内燃機関の小型化を図ることができる。According to the configuration of the present invention, the upper head cover can be moved in the longitudinal direction of the camshaft in a state where one side of the rim of the cam pulley overlaps the cylinder head, and the upper head cover can be easily attached and detached. . As a result, maintenance and inspection can be carried out with the cam pulley attached to the camshaft and the transmission gear wrapped around the cam pulley, and maintainability and serviceability are not impaired. Further, since the cam pulley is provided close to the cylinder head, the overall length of the internal combustion engine can be reduced, and the internal combustion engine can be made smaller.

更に、下部ヘッドカバーにはカムキャップが一体に形成
されているので、カムキャップ自体の剛性が向上し、カ
ム軸が高回転しても充分に耐えることができる。Furthermore, since the cam cap is integrally formed with the lower head cover, the rigidity of the cam cap itself is improved and can sufficiently withstand even high rotations of the camshaft.

〔実施例〕〔Example〕

以下図面に基づいてこの発明の実施例を詳細且つ具体的
に説明する。Embodiments of the present invention will be described in detail and specifically below based on the drawings.

第１〜７図は、この発明の実施例を示すものである。図
において、２はシリンダヘッド４とシリンダブロック（
図示せず）とにより構成される内燃機関である。前記シ
リンダヘッド４上面には、カム室６を形成すべくシリン
ダヘッドカバー８が固設されている。1 to 7 show embodiments of this invention. In the figure, 2 indicates the cylinder head 4 and the cylinder block (
(not shown). A cylinder head cover 8 is fixedly installed on the upper surface of the cylinder head 4 to form a cam chamber 6.

前記カム室６内には、内燃機関２の長手方向Ｘに指向し
て動弁機構ｌＯのカム軸１２が配設されている。このカ
ム軸１２の−の端部１４には、カムプーリ１６が固設さ
れる。つまり、このカムブー１Ｊ１６のボス１８がカム
軸１２の端部１４に嵌合し、この端部１４の端面２ｏが
ら軸方向に形成したねし穴（図示せず）に螺着する取付
用ボルト２２によってカムプーリ１６が固設されている
。A camshaft 12 of a valve mechanism IO is disposed within the cam chamber 6 so as to be oriented in the longitudinal direction X of the internal combustion engine 2 . A cam pulley 16 is fixed to the negative end 14 of the camshaft 12 . That is, the boss 18 of this camboo 1J16 fits into the end 14 of the cam shaft 12, and the mounting bolt 22 is screwed into a tapped hole (not shown) formed in the end surface 2o of the end 14 in the axial direction. The cam pulley 16 is fixedly installed.

前記シリンダヘッドカバー８は、シリンダへラド４上面
に直接載置して固定される下部ヘッドカバー２４とこの
下部ヘンドヵバー２４に載置して固定される上部へラド
カバ−２６とからなる。また、前記下部ヘッドカバー２
４には、シリンダヘッド４と共働してカム軸１２を回転
可能に支持する所定間隔で且つ内燃機関２の長手方向Ｘ
と略直交して配置された複数のカムキャップ２８が形成
されている（第２〜６図参照）。即ち、カム軸１２は、
第５図に示す如く、シリンダヘッド４に形成された下部
支持湾部３０とカムキャップ２８に形成された上部支持
湾部３２とにより保持されている。The cylinder head cover 8 consists of a lower head cover 24 that is directly placed and fixed on the upper surface of the cylinder rad 4 and an upper rad cover 26 that is placed and fixed on the lower hend cover 24. In addition, the lower head cover 2
4, at predetermined intervals that cooperate with the cylinder head 4 to rotatably support the camshaft 12 and in the longitudinal direction X of the internal combustion engine 2.
A plurality of cam caps 28 are formed which are arranged substantially perpendicular to the cam caps 28 (see FIGS. 2 to 6). That is, the camshaft 12 is
As shown in FIG. 5, it is held by a lower support bay part 30 formed in the cylinder head 4 and an upper support bay part 32 formed in the cam cap 28.

また、第３〜５図に示す如く、前記カムプーリ１６が取
付けられた側の端部カムキャップ２８−１は、カム軸１
２の大径部３４を支持する軸受３６が嵌合される外側キ
ャップ部３８と、この大径部３４に連設した小径部４０
を支持する内側キャップ部４２と、この外側キャップ部
３８と内側キャンプ部４２とを連結する段差部４４とか
らなる。また、内側キャップ部４２の外径は、外側キャ
ップ部３８の外径よりも小さく形成されている。Further, as shown in FIGS. 3 to 5, the end cam cap 28-1 on the side where the cam pulley 16 is attached is attached to the cam shaft 1.
an outer cap portion 38 into which a bearing 36 that supports the large diameter portion 34 of No. 2 is fitted; and a small diameter portion 40 connected to the large diameter portion 34;
It consists of an inner cap part 42 that supports the outer cap part 38 and a step part 44 that connects the outer cap part 38 and the inner camp part 42. Further, the outer diameter of the inner cap portion 42 is smaller than the outer diameter of the outer cap portion 38.

更に、この内側キャンプ部４２には、該内側キャップ４
２を形成した下部ヘッドカバー２４をシリンダヘッド４
に支持すべくシリンダヘッド４．上面側から螺着する支
持用ボルト４６が取付けられる。Furthermore, this inner camp part 42 has the inner cap 4.
2 is attached to the cylinder head 4.
The cylinder head 4. A support bolt 46 that is screwed in from the top side is attached.

また、前記カムプーリ１６は、シリンダヘッド４に近接
して設けられる。即ち、第３．４図に示す如く、カムプ
ーリ１６は、カム軸１２の端部１４に固定する前記ボス
１８と、ベルト４８が巻掛けられるリム５０と、このボ
ス１８とリム５゜とを連結する複数のリプ５２とからな
る。前記リム５０は、カム軸１２の長手方向Ｘで且つシ
リンダヘッド４側に指向する一側であるヘッド側リム部
５４とこの内側リム部５４とは反対側に、つまりシリン
ダヘッド４から離間し且つ長手方向Ｘ側に指向する他側
である外側リム部５６とからなる。Further, the cam pulley 16 is provided close to the cylinder head 4. That is, as shown in FIG. 3.4, the cam pulley 16 connects the boss 18 fixed to the end 14 of the camshaft 12, the rim 50 around which the belt 48 is wound, and the boss 18 and the rim 5°. It consists of a plurality of replies 52. The rim 50 has a head-side rim portion 54, which is one side facing toward the cylinder head 4 in the longitudinal direction X of the camshaft 12, and an inner rim portion 54 on the opposite side; The outer rim portion 56 is the other side oriented in the longitudinal direction X side.

前記内側リム部５４の端面５８は、シリンダヘッド４の
端部６０及び外側キャップ部３８に重合して位置し、シ
リンダヘッド４の端部６０の端面６２及び外側キャップ
部３８の端面６４を包囲している。即ち、内側リム部５
４とシリンダヘッド４とは、距離Ｍだけ重合している。The end surface 58 of the inner rim portion 54 is located overlapping the end portion 60 of the cylinder head 4 and the outer cap portion 38, and surrounds the end surface 62 of the end portion 60 of the cylinder head 4 and the end surface 64 of the outer cap portion 38. ing. That is, the inner rim portion 5
4 and the cylinder head 4 overlap by a distance M.

また、外側キャップ部３８の上面６６には、上部ヘッド
カバー２６の外端部６８が固設されている。この上部ヘ
ッドカバー２６の外端部６８の下面７０は、支持用ボル
ト４６の頂部７２の上面７４よりも上方に位置している
。Further, an outer end portion 68 of the upper head cover 26 is fixed to the upper surface 66 of the outer cap portion 38 . The lower surface 70 of the outer end 68 of the upper head cover 26 is located above the upper surface 74 of the top 72 of the support bolt 46.

更に、カムプーリ１６の内側リム部５４と上部へ７ドカ
バー２６の外端部６８間には、所定の空間７６が形成さ
れる。Further, a predetermined space 76 is formed between the inner rim portion 54 of the cam pulley 16 and the outer end portion 68 of the upper cover 26.

なお、符号７８は点火栓、８０は燃焼室、８２はカムプ
ーリカバーである。Note that 78 is a spark plug, 80 is a combustion chamber, and 82 is a cam pulley cover.

次に、この実施例の作用を説明する。Next, the operation of this embodiment will be explained.

動弁機構１０のタペットのクリアランス等の保守点検を
する際には、上部ヘッドカバー２６をカム軸１２の長手
方向Ｘに移動してこの上部ヘッドカバー２６を取外す。When carrying out maintenance inspections such as the tappet clearance of the valve mechanism 10, the upper head cover 26 is moved in the longitudinal direction X of the camshaft 12 and removed.

そして、動弁機構１０の所望箇所の保守点検を行う。こ
のとき、上部へラドカバ−２６を支持用ボルト４６の頭
部７２を乗り越えさせる必要がないので、上部ヘッドカ
バー２６を容易に取外すことができ、整備性を向上させ
得るとともに、組付性及びサービス性を向上させる。Then, maintenance and inspection of desired parts of the valve mechanism 10 are performed. At this time, since there is no need to move the top cover 26 over the head 72 of the support bolt 46, the top head cover 26 can be easily removed, improving maintainability, as well as ease of assembly and service. improve.

上述の如く、上部へソドカバー２６をカム軸１２の長平
方向Ｘに容易に移動して且つ支持用ボルト４６の頭部７
２を乗り越える必要がないので、カム軸１２にカムプー
リ１６を取付は且つカムブー　Ｕ　１６にベルト４８を
巻掛けた状態で動弁機構１０の保守点検を果し、整備性
、組付性そしてサービス性を向上させることができる。As described above, the front cover 26 can be easily moved upward in the longitudinal direction X of the camshaft 12 and the head 7 of the support bolt 46
2, maintenance and inspection of the valve mechanism 10 can be carried out with the cam pulley 16 mounted on the camshaft 12 and the belt 48 wrapped around the camboo U 16, improving maintainability, ease of assembly, and ease of service. can be improved.

また、上部へソドカバー２６を取付け・取外すためのス
ペースを小さくするとともに、カムプーリ１６のリム５
０の内側リム部５４をシリンダヘッド４及びカムキャッ
プ２８の外側キャップ部３８に所定距離Ｍだけ重合させ
ているので、内燃機関２の全長を小さくして小型化を図
るとともに、重量を低減することができる。In addition, the space for attaching and removing the front cover 26 to the upper part is reduced, and the rim 5 of the cam pulley 16 is
Since the inner rim portion 54 of the internal combustion engine 2 is overlapped with the cylinder head 4 and the outer cap portion 38 of the cam cap 28 by a predetermined distance M, the overall length of the internal combustion engine 2 can be reduced to reduce the size and weight. Can be done.

また、カムキャップ２８を下部ヘッドカバー２４に形成
しているので、カムキャップ２４の剛性を向上させ、カ
ム軸１２が高回転しても充分に耐え得るものである。Further, since the cam cap 28 is formed on the lower head cover 24, the rigidity of the cam cap 24 is improved, and it can sufficiently withstand even when the camshaft 12 rotates at a high speed.

なお、この実施例においては、カムブーＩＪ１６をベル
ト４８で回転させる構成としたが、このベルト４８の代
りに、チェーン等の伝動具を使用し得ることは勿論であ
る。In this embodiment, the Camboo IJ 16 is rotated by a belt 48, but it goes without saying that a transmission device such as a chain may be used instead of the belt 48.

〔発明の効果〕 以上詳細な説明から明らかなようにこの発明によれば、
カムプーリをシリンダヘッドに近接して設けるとともに
、シリンダへソドカバーを上部ヘッドカバーと下部へソ
ドカバーとに分割し、下部ヘッドカバーにはカムキャッ
プを一体的に形成したので、内燃機関の小型化を図り得
て、カムプーリにベルト等の伝動具を巻き掛けた状態で
保守点検を果して整備性・サービス性を損うことがなく
、しかもカムキャップ自体の剛性を向上し得る。[Effects of the Invention] As is clear from the above detailed description, according to the present invention,
The cam pulley is provided close to the cylinder head, the cylinder head cover is divided into an upper head cover and a lower head cover, and the cam cap is integrally formed on the lower head cover, making it possible to downsize the internal combustion engine. To perform maintenance and inspection with a transmission device such as a belt wrapped around a cam pulley without impairing maintainability and serviceability, and moreover, the rigidity of the cam cap itself can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１〜７図はこの発明の実施例を示し、第１図は内燃機
関の平面における一部断面図、第２図は内燃機関の側面
における一部断面図、第３図は第２図の矢印■による拡
大半断面図、第４図は第３図の矢印■による拡大図、第
５図は第２図のＶ−■線による拡大断面図、第６図はカ
ムブーりの取付構造の平面における一部断面図、第７図
はカムプーリの取付構造の概略正面図である。 第８．９図は従来におけるカムプーリの取付構造の断面
図である。 図において、２は内燃機関、４はシリンダヘッド、６は
カム室、８はシリンダヘッドカバー１０は動弁機構、１
２はカム軸、１６はカムプーリ、２４は下部ヘッドカバ
ー、２６は上部へソドカバー、２８はカムキャップ、３
８は外側キャップ部、そして４２は内側キャップ部であ
る。 特許出願人　　　　鈴木自動車工業株式会社代理人　弁
理士　　西　郷　義　美 第７図 第６図 第８図 第９図1 to 7 show embodiments of the present invention, in which FIG. 1 is a partial sectional view on a plane of the internal combustion engine, FIG. 2 is a partial sectional view on the side of the internal combustion engine, and FIG. Fig. 4 is an enlarged half-sectional view shown by the arrow ■ in Fig. 3, Fig. 5 is an enlarged sectional view taken along the line V-■ in Fig. 2, and Fig. 6 is a plan view of the camboot mounting structure. FIG. 7 is a schematic front view of the cam pulley mounting structure. FIG. 8.9 is a sectional view of a conventional cam pulley mounting structure. In the figure, 2 is an internal combustion engine, 4 is a cylinder head, 6 is a cam chamber, 8 is a cylinder head cover 10 is a valve mechanism, 1
2 is the camshaft, 16 is the cam pulley, 24 is the lower head cover, 26 is the top cover, 28 is the cam cap, 3
8 is an outer cap part, and 42 is an inner cap part. Patent Applicant Suzuki Motor Co., Ltd. Agent Patent Attorney Yoshimi Nishigo Figure 7 Figure 6 Figure 8 Figure 9

Claims (1)

【特許請求の範囲】[Claims] １、内燃機関シリンダヘッドに配置したカム軸の一端側
に固定するカムプーリのリムの一側が前記シリンダヘッ
ドに重合すべく前記カムプーリを前記シリンダヘッド側
に近接させて前記カム軸に設け、前記シリンダヘッド上
部に固定するシリンダヘッドカバーを上部ヘッドカバー
と下部ヘッドカバーとに分割するとともにこの下部ヘッ
ドカバーには前記シリンダヘッドと共働して前記カム軸
を支持するカムキャップを一体に形成したことを特徴と
する内燃機関のカム室構造。1. A cam pulley fixed to one end side of a camshaft disposed in an internal combustion engine cylinder head is provided on the camshaft in such a way that one side of the rim of the cam pulley is placed close to the cylinder head side so that one side of the rim overlaps the cylinder head, An internal combustion engine characterized in that a cylinder head cover fixed to an upper part is divided into an upper head cover and a lower head cover, and a cam cap that cooperates with the cylinder head and supports the camshaft is integrally formed on the lower head cover. cam chamber structure.
JP21766188A 1988-08-31 1988-08-31 Structure of cam chamber of internal combustion engine Pending JPH0267448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21766188A JPH0267448A (en) 1988-08-31 1988-08-31 Structure of cam chamber of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21766188A JPH0267448A (en) 1988-08-31 1988-08-31 Structure of cam chamber of internal combustion engine

Publications (1)

Publication Number Publication Date
JPH0267448A true JPH0267448A (en) 1990-03-07

Family

ID=16707740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21766188A Pending JPH0267448A (en) 1988-08-31 1988-08-31 Structure of cam chamber of internal combustion engine

Country Status (1)

Country Link
JP (1) JPH0267448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7080616B2 (en) 2003-10-10 2006-07-25 Nissan Motor Co., Ltd. Cylinder head assembly for an internal combustion engine with a camshaft position sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7080616B2 (en) 2003-10-10 2006-07-25 Nissan Motor Co., Ltd. Cylinder head assembly for an internal combustion engine with a camshaft position sensor

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