JPH09256829A - Direct acting type valve gear - Google Patents
Direct acting type valve gearInfo
- Publication number
- JPH09256829A JPH09256829A JP6841996A JP6841996A JPH09256829A JP H09256829 A JPH09256829 A JP H09256829A JP 6841996 A JP6841996 A JP 6841996A JP 6841996 A JP6841996 A JP 6841996A JP H09256829 A JPH09256829 A JP H09256829A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve spring
- lubricating oil
- cylinder head
- 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
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、Ｖ型エンジン等の
ようなシリンダが傾斜しているエンジンのシリンダヘッ
ドに設けた直動型動弁装置に係り、特に、バルブスプリ
ングの下端部に潤滑油が溜まり易いようにした直動型動
弁装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct drive type valve operating device provided on a cylinder head of an engine such as a V type engine having a tilted cylinder, and more particularly to a lubricating oil for a lower end portion of a valve spring. The present invention relates to a direct-acting type valve operating device that facilitates accumulation.
【０００２】[0002]
【従来の技術】図４は、従来の直動型動弁装置(以下動
弁装置と略称する)を備えるエンジン(ＤＯＨＣ式エンジ
ン)のシリンダヘッドを略示するもので、シリンダの垂
直をなす軸線(Ｘ)を挾む右方は吸気側、同じく左方は排
気側の動弁装置となっている。2. Description of the Related Art FIG. 4 schematically shows a cylinder head of an engine (DOHC engine) equipped with a conventional direct-acting valve operating device (hereinafter abbreviated as valve operating device). The right side across (X) is the intake side valve, and the left side is the exhaust side valve mechanism.
【０００３】左右の各動弁装置は、シリンダヘッド(01)
に圧入されたバルブガイド(02)を貫通している吸気弁(0
3)及び排気弁(04)と、それらの上端部に、１対のコッタ
(05)により止着されたスプリングリテーナ(06)と、その
下面とシリンダヘッド(01)の上面との間に縮設されたバ
ルブスプリング(07)と、吸・排気弁(03)(04)の軸端部や
スプリングリテーナ(06)を覆うようして、シリンダヘッ
ド(01)と一体をなす案内部(08)内に嵌合されたタペット
(09)とよりなっている。The left and right valve actuating devices include a cylinder head (01)
The intake valve (0
3) and the exhaust valve (04) and a pair of cotters on their upper ends.
A spring retainer (06) fixed by (05), a valve spring (07) compressed between the lower surface of the spring retainer (06) and the upper surface of the cylinder head (01), and intake / exhaust valves (03) (04). Tappet fitted in the guide part (08) that is integral with the cylinder head (01) so as to cover the shaft end part and the spring retainer (06) of the
It consists of (09).
【０００４】タペット(09)は、その上面に嵌合したシム
(010)を介して、カム(011)と摺接し、カム(011)が回転
することにより、吸・排気弁(03)(04)は上下運動をさせ
られて、吸・排気ポート(012)(013)をそれぞれ開閉す
る。The tappet (09) is a shim fitted on its upper surface.
By sliding the cam (011) through the (010) and rotating the cam (011), the intake / exhaust valves (03) (04) are moved up and down, and the intake / exhaust port (012) Open (013) respectively.
【０００５】このような動弁装置においては、吸・排気
弁(03)(04)の軸端とタペット(09)との接触面やコッタ(0
5)の止着部は、タペット(09)の奥部に位置しているた
め、潤滑油が行き渡りにくく、摩耗し易い。In such a valve operating device, the contact surface between the shaft end of the intake / exhaust valve (03) (04) and the tappet (09) and the cotter (0
Since the fastening part of 5) is located at the inner part of the tappet (09), it is difficult for the lubricating oil to spread and is easily worn.
【０００６】この部分の潤滑油は、通常、シリンダヘッ
ド(01)におけるバルブスプリング(07)の下端部付近に滞
留している潤滑油、すなわちオイルパンに還流しないで
若干滞留している潤滑油(014)を、エンジン運転中にお
けるバルブスプリング(07)の上下動(震動)により飛沫化
又はミスト化してはね上げることにより、行われる。The lubricating oil in this portion is usually the lubricating oil that stays near the lower end of the valve spring (07) in the cylinder head (01), that is, the lubricating oil that slightly stays without returning to the oil pan ( 014) is splashed or misted by the vertical movement (vibration) of the valve spring (07) while the engine is operating, and splashed up.
【０００７】[0007]
【発明が解決しようとする課題】しかし、Ｖ型エンジン
のように、シリンダの軸線(Ｘ)が一方(図中左方)に傾斜
していると、図５に示すように、シリンダヘッド(01)及
びそれに装着される動弁装置も傾斜するため、傾斜方向
に位置する排気側の動弁装置における排気弁(04)の軸端
等の潤滑が不充分となる。However, when the axis line (X) of the cylinder is inclined to one side (the left side in the drawing) as in the V-type engine, as shown in FIG. ) And the valve operating device attached thereto also incline, so that the shaft end of the exhaust valve (04) in the exhaust valve operating device located in the inclining direction is not sufficiently lubricated.
【０００８】これは、シリンダヘッド(01)が傾斜してい
ると、その上面に滞留する潤滑油(014)の油面が下が
り、バルブスプリング(07)の下端部が潤滑油(014)に浸
漬されなくなって、バルブスプリング(07)による潤滑油
(014)のはね上げ効果が失なわれるためである。This is because when the cylinder head (01) is inclined, the oil level of the lubricating oil (014) staying on the upper surface of the cylinder head (01) is lowered and the lower end of the valve spring (07) is immersed in the lubricating oil (014). No longer used, lubrication oil by valve spring (07)
This is because the splashing effect of (014) is lost.
【０００９】この問題を解決するためには、例えば図６
に示すように、タペット(09)の頂壁とシム(010)とに穿
設した貫通孔(015)同士を、タペット(09)の頂壁の上面
に形成した環状凹溝(016)を介して互いに連通させ、カ
ムジャーナルの軸受部(図示略)等より漏出した潤滑油
が、貫通孔(015)を通ってタペット(09)の奥部に入り込
むことにより、排気弁(04)の軸端等を潤滑することも考
えられる。In order to solve this problem, for example, FIG.
As shown in, through holes (015) formed in the top wall of the tappet (09) and the shim (010), through the annular groove (016) formed on the upper surface of the top wall of the tappet (09). The lubricating oil that has leaked from the bearing part (not shown) of the cam journal, etc. through the through hole (015) and into the deep part of the tappet (09). It is also possible to lubricate etc.
【００１０】しかし、このようにすると、カムの回転に
よりシム(010)が回転させられる際、貫通孔(015)のため
に、カム及びシム(010)の摺接面が偏摩耗を生じ易くな
る。また、タペット(09)がアルミニウム合金により形成
されて際において、貫通孔(015)や環状凹溝(016)を形成
することは、強度上好ましくない。However, in this case, when the shim (010) is rotated by the rotation of the cam, the sliding contact surfaces of the cam and the shim (010) are likely to cause uneven wear due to the through hole (015). . Further, when the tappet (09) is made of an aluminum alloy, it is not preferable in terms of strength to form the through hole (015) and the annular groove (016).
【００１１】本発明の目的は、シリンダが傾斜している
エンジンでも、バルブスプリングの下端部が潤滑油によ
り浸漬されるようにすることにより、潤滑油のはね上げ
効果を高め、バルブ軸端部等の潤滑を充分なものとし
て、その摩耗を最小限に抑えうるようにした直動型動弁
装置を提供することにある。The object of the present invention is to improve the splashing effect of the lubricating oil by dipping the lower end portion of the valve spring in the lubricating oil even in an engine having a tilted cylinder, so that the valve shaft end portion and the like can be improved. It is an object of the present invention to provide a direct-acting type valve operating device in which the lubrication is sufficient and the wear can be minimized.
【００１２】[0012]
【課題を解決するための手段】本発明によると、上記課
題は、次のようにして解決される。 (１) シリンダが傾斜しているエンジンのシリンダヘッ
ドに設けられる直動型動弁装置であって、バルブスプリ
ングの下端が当接するシリンダヘッドの上面に、バルブ
スプリングの下端部における少なくとも傾斜方向側の周
囲を囲繞する囲い板を設ける。According to the present invention, the above-mentioned problem is solved as follows. (1) A direct-acting type valve operating device provided on a cylinder head of an engine in which a cylinder is inclined, wherein a lower end of the valve spring is at least in an inclination direction side on an upper surface of the cylinder head with which a lower end of the valve spring contacts. Provide a shroud surrounding the circumference.
【００１３】(２)上記（１）項において、囲い板が、バ
ルブスプリングの座金と一体的に形成されているものと
する。(2) In the above item (1), it is assumed that the shroud is integrally formed with the washer of the valve spring.
【００１４】(３)上記（１）項において、囲い板が、シ
リンダヘッドと一体的に形成されているものとする。(3) In the above item (1), the enclosing plate is integrally formed with the cylinder head.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施例を、図面に
基づいて説明する。なお、従来と同様の部材には、その
符号より冒頭の「０」を削除した符号を付すにとどめ
て、その詳細な説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same members as the conventional ones are given the same reference numerals with the leading "0" deleted, and their detailed description is omitted.
【００１６】図１は、本発明の直動型動弁装置における
排気側を示すもので、シリンダの軸線は、従来例と同
様、左側方に傾斜している。FIG. 1 shows the exhaust side of the direct-acting valve operating system according to the present invention. The axis of the cylinder is inclined to the left side, as in the conventional example.
【００１７】バルブスプリング(７)の下端が当接してい
るシリンダヘッド(１)の上面には、図２に示すように、
平面視がほぼ馬蹄型をなし、かつ外周端縁に、バルブス
プリング(７)の下端部を囲繞する立上がり片(20)が連設
された囲い板(21)が、その中心孔に連設した上向きのフ
ランジ部(22)を、バルブガイド(２)に圧入することによ
り、不動状態で取付けられている。立上がり片(20)の上
下寸法は、傾斜方向側が漸次高くなるようにしてある。
囲い板(21)は、バルブスプリング(７)の座金を兼ねてい
る。On the upper surface of the cylinder head (1) with which the lower end of the valve spring (7) is in contact, as shown in FIG.
An encircling plate (21), which is substantially horseshoe-shaped in plan view and has a rising piece (20) surrounding the lower end of the valve spring (7) continuously provided on the outer peripheral edge, is continuously provided in the center hole. The upward flange portion (22) is press-fitted into the valve guide (2) so that it is fixedly attached. The up-and-down dimension of the rising piece (20) is set to be gradually higher on the inclination direction side.
The shroud (21) also serves as a washer for the valve spring (7).
【００１８】なお、立上がり片(20)を傾斜方向側を高く
するのは、全体を筒状に高くすると、潤滑油の貯留量が
大となり過ぎて、オイルパンへの環流量が少なくなり、
その油量が減少する恐れがあるからである。It should be noted that the reason why the rising piece (20) is made higher in the inclination direction is that if the whole is made higher in a tubular shape, the amount of lubricating oil stored becomes too large and the amount of recirculation to the oil pan decreases.
This is because the amount of oil may decrease.
【００１９】このような囲い板(21)を設けることによ
り、Ｖ型エンジン等のようにシリンダ及びシリンダヘッ
ド(１)が傾斜していても、上方のカムジャーナルの軸受
等より漏出した潤滑油(14)が、オイルパンに流れ落ちな
いで溜まり、バルブスプリング(７)の下端部が潤滑油(1
4)に浸漬される。その結果、エンジン運転中のバルブス
プリング(７)の上下動により、潤滑油(14)は、飛沫化又
はミスト化されてはね上げられ、タペット(９)における
頂壁の下面中央部と排気弁(４)の軸端面との接触部やコ
ッタ(５)の嵌合部等を潤滑することにより、それらの部
分の摩耗が防止される。By providing such an enclosing plate (21), even if the cylinder and the cylinder head (1) are inclined as in a V-type engine or the like, the lubricating oil leaked from the bearing or the like of the upper cam journal ( 14) collects in the oil pan without flowing down, and the lower end of the valve spring (7) is filled with lubricating oil (1
It is immersed in 4). As a result, the vertical movement of the valve spring (7) while the engine is operating causes the lubricating oil (14) to be splashed or mist and splashed, and the central portion of the lower surface of the top wall of the tappet (9) and the exhaust valve (4). By lubricating the contact portion with the shaft end surface of (4), the fitting portion of the cotter (5), etc., wear of these portions is prevented.
【００２０】図３は、本発明の第２実施例を示すもの
で、第１実施例と同様の囲い板(23)を、シリンダヘッド
(１)の上面におけるバルブスプリング(７)の周りに一体
的に連設したものである。この際も、立上がり片(24)
は、上記と同様、傾斜方向側が漸次高くなるようにして
ある。FIG. 3 shows a second embodiment of the present invention, in which the same enclosing plate (23) as in the first embodiment is attached to the cylinder head.
It is integrally connected around the valve spring (7) on the upper surface of (1). Also at this time, the rising piece (24)
Is set to be gradually higher on the inclination side, as in the above.
【００２１】第２実施例においても、上記第１実施例と
同様の作用効果を奏することができる。上記実施例で
は、排気側が傾斜した動弁装置について説明したが、吸
気側が傾斜している際にも適用しうるのは勿論である。Also in the second embodiment, the same operational effect as that of the first embodiment can be obtained. Although the valve operating device in which the exhaust side is inclined has been described in the above embodiment, it is needless to say that the invention can be applied to the case where the intake side is inclined.
【００２２】[0022]
【発明の効果】本発明によれば、次のような効果が得ら
れる。 （ａ）Ｖ型エンジン等のようにシリンダが傾斜していて
も、バルブスプリングの下端部は、囲い板内に貯留され
た潤滑油に浸漬される。その結果、潤滑油が、バルブス
プリングの伸縮運動によりタペットの奥部まではね上げ
られることにより、バルブ軸端部とタペット頂壁の下面
との接触部等が効果的に潤滑され、その部分の摩耗を防
ぐことができる。According to the present invention, the following effects can be obtained. (A) Even if the cylinder is tilted as in a V-type engine, the lower end of the valve spring is immersed in the lubricating oil stored in the shroud. As a result, the lubricating oil is repelled up to the inner part of the tappet by the expansion and contraction movement of the valve spring, so that the contact part between the valve shaft end part and the lower surface of the tappet top wall is effectively lubricated, and the wear of that part is prevented. Can be prevented.
【００２３】（ｂ）請求項２のようにすると、バルブス
プリング用の座金を別途設ける必要はなく、また、囲い
板は、バルブスプリングの荷重により常に押さえられる
ので、強固に固定される。(B) According to the second aspect, it is not necessary to separately provide a washer for the valve spring, and the enclosing plate is always pressed by the load of the valve spring, so that it is firmly fixed.
【００２４】（ｃ）請求項３のようにすると、囲い板を
装着する工数、及び部品点数を削減しうる。(C) According to the third aspect, it is possible to reduce the number of steps for mounting the enclosure plate and the number of parts.
【図１】本発明の第１実施例を適用したシリンダヘッド
の排気弁側の縦断正面図である。FIG. 1 is a vertical sectional front view of an exhaust valve side of a cylinder head to which a first embodiment of the present invention is applied.
【図２】囲い板の平面図である。FIG. 2 is a plan view of an enclosure plate.
【図３】本発明の第２実施例を示す要部の拡大縦断正面
図である。FIG. 3 is an enlarged vertical sectional front view of a main part showing a second embodiment of the present invention.
【図４】従来の直動型動弁装置におけるシリンダが直立
しているエンジンのシリンダヘッド部分の縦断正面図で
ある。FIG. 4 is a vertical cross-sectional front view of a cylinder head portion of an engine in which a cylinder is upright in a conventional direct-acting valve operating device.
【図５】同じくシリンダが傾斜しているエンジンのシリ
ンダヘッド部分の縦断正面図である。FIG. 5 is a vertical sectional front view of a cylinder head portion of an engine in which the cylinder is also inclined.
【図６】同じく他の直動型動弁装置のタペット部分の縦
断正面図である。FIG. 6 is a vertical sectional front view of a tappet portion of another direct-acting valve operating device.
(１)シリンダヘッド (２)バルブガイド (３)吸気弁 (４)排気弁 (５)コッタ (６)スプリングリテーナ (７)バルブスプリング (８)案内部 (９)タペット (10)シム (11)カム (12)吸気ポート (13)排気ポート (14)潤滑油 (20)(24)立上がり片 (21)(23)囲い板 (22)フランジ部 (1) Cylinder head (2) Valve guide (3) Intake valve (4) Exhaust valve (5) Cotter (6) Spring retainer (7) Valve spring (8) Guide part (9) Tappet (10) Shim (11) Cam (12) Intake port (13) Exhaust port (14) Lubricating oil (20) (24) Rising piece (21) (23) Enclosure plate (22) Flange part
Claims (3)
ンダヘッドに設けられる直動型動弁装置であって、バル
ブスプリングの下端が当接するシリンダヘッドの上面
に、バルブスプリングの下端部における少なくとも傾斜
方向側の周囲を囲繞する囲い板を設けたことを特徴とす
る直動型動弁装置。1. A direct-acting type valve operating device provided on a cylinder head of an engine having a tilted cylinder, wherein at least a lower end portion of the valve spring is tilted in a tilt direction on an upper surface of the cylinder head with which a lower end of the valve spring abuts. A direct-acting valve operating device characterized in that an enclosing plate surrounding the side is provided.
体的に形成されている請求項１記載の直動型動弁装置。2. The direct acting valve operating system according to claim 1, wherein the surrounding plate is formed integrally with the washer of the valve spring.
成されている請求項１記載の直動型動弁装置。3. The direct acting valve operating system according to claim 1, wherein the surrounding plate is formed integrally with the cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6841996A JPH09256829A (en) | 1996-03-25 | 1996-03-25 | Direct acting type valve gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6841996A JPH09256829A (en) | 1996-03-25 | 1996-03-25 | Direct acting type valve gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09256829A true JPH09256829A (en) | 1997-09-30 |
Family
ID=13373155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6841996A Pending JPH09256829A (en) | 1996-03-25 | 1996-03-25 | Direct acting type valve gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09256829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6520126B2 (en) | 1999-12-28 | 2003-02-18 | Kawasaki Jukogyo Kabushiki Kaisha | Cylinder head cooling passage structure of overhead cam type engine |
-
1996
- 1996-03-25 JP JP6841996A patent/JPH09256829A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6520126B2 (en) | 1999-12-28 | 2003-02-18 | Kawasaki Jukogyo Kabushiki Kaisha | Cylinder head cooling passage structure of overhead cam type engine |
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