JPH04112910A - Oil path structure of cylinder head - Google Patents

Oil path structure of cylinder head

Info

Publication number
JPH04112910A
JPH04112910A JP23237490A JP23237490A JPH04112910A JP H04112910 A JPH04112910 A JP H04112910A JP 23237490 A JP23237490 A JP 23237490A JP 23237490 A JP23237490 A JP 23237490A JP H04112910 A JPH04112910 A JP H04112910A
Authority
JP
Japan
Prior art keywords
oil
spring receiving
hole
cylinder head
spring
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
JP23237490A
Other languages
Japanese (ja)
Inventor
Koichi Nakae
公一 中江
Toyoichi Umehana
豊一 梅花
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.)
Toyota Motor Corp
Original Assignee
Toyota 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP23237490A priority Critical patent/JPH04112910A/en
Publication of JPH04112910A publication Critical patent/JPH04112910A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To reduce resistance received by each-spring in an internal combustion engine formed in the upper wall surface of a cylinder head with respective spring receiving hole for receiving the lower ends of intake and exhaust valve urging springs and oil dropping holes by draining oil in the respective spring receiving holes to the oil dropping holes through an oil guide groove. CONSTITUTION:A cylinder head 1 is formed in the nearly flat upper wall surface 10 with receiving holes 12, 14 for receiving the lower ends of an intake valve urging spring 11 and exhaust valve urging spring 13. An oil dropping hole 28 is formed in the upper wall surface 10 at the opposite side to the exhaust valve 4 with reference to bridging parts 24, 25 affording communication between boss parts 23 or the like of adjacent head bolt holes 22. Then, the cylinder head is formed on the upper wall surface 10 respectively with an oil guide groove 29 interconnecting these spring receiving holes 12, 14, an oil guide groove 30 interconnecting a pair of spring receiving holes 14 and an oil guide groove 31 interconnecting the spring receiving hole 14 and the oil dropping hole 28 so that oil, flowing into the respective spring receiving holes 12, 14 can be drained into the oil drooping hole 28 through the oil guide grooves 29-31.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は内燃機関のシリンダヘッドのオイル通路構造に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oil passage structure in a cylinder head of an internal combustion engine.

〔従来の技術〕[Conventional technology]

シリンダヘッドの上壁面にはカムシャフトや動弁機構を
潤滑するためのオイルが溜まっており、このオイルをオ
イルパン内に返戻するために通常シリンダヘッド上壁面
にはオイル落し孔が形成されている（実開昭６１−１６
６１１０号公報参照）。Oil is collected on the top wall of the cylinder head to lubricate the camshaft and valve mechanism, and an oil drop hole is usually formed on the top wall of the cylinder head to return this oil into the oil pan. (Jitsukai 61-16
(See Publication No. 6110).

［発明が解決しようとする課題〕 ところでシリンダヘッド上壁面には給気弁付勢用ばねの
下端部を受容するばね受容孔および排気弁付勢用ばねの
下端部を受容するばね受容孔が形成されており、機関本
体の高さを低くするためにはこれらばね受容孔の深さを
深くしなければならない。しかしながらばね受容孔の深
さを深くするとばね受容孔内に多量のオイルが溜まり、
その結果給排気弁付勢用ばねの下端部はかなりの高さま
でオイル内に浸漬されることになる。このように給排気
弁付勢用ばねの下端部がかなりの高さまでオイル内に浸
漬されるとこのオイルが給排気弁付勢用ばねの伸縮作用
に対して大きな抵抗を与えるばかりでなく、オイル内に
多量の気泡が発生するためにオイルポンプによる圧送不
良をひき起こすという問題がある。[Problems to be Solved by the Invention] Incidentally, a spring receiving hole for receiving the lower end of the air supply valve biasing spring and a spring receiving hole for receiving the lower end of the exhaust valve biasing spring are formed on the upper wall surface of the cylinder head. In order to reduce the height of the engine body, the depth of these spring receiving holes must be increased. However, if the depth of the spring receiving hole is increased, a large amount of oil will accumulate inside the spring receiving hole.
As a result, the lower end of the supply/exhaust valve biasing spring is immersed in oil to a considerable height. If the lower end of the supply/exhaust valve biasing spring is immersed in oil to a considerable height, this oil not only provides great resistance to the expansion and contraction action of the supply/exhaust valve biasing spring, but also There is a problem in that a large amount of air bubbles are generated inside the oil pump, causing poor pumping by the oil pump.

〔課題を解決するための手段〕[Means to solve the problem]

上記問題点を解決するために本発明によればシリンダヘ
ッド上壁面に給気弁付勢用ばねの下端部を受容するばね
受容孔と、排気弁付勢用ばねの下端部を受容するばね受
容孔と、オイル落し孔とを形成した内燃機関において、
これらのばね受容孔間を延びると共に少くとも一方のば
ね受容孔からオイル落し孔まで延びるオイル案内溝をシ
リンダヘッド上壁面に形成している。In order to solve the above problems, the present invention provides a spring receiving hole for receiving the lower end of the air supply valve biasing spring on the upper wall surface of the cylinder head, and a spring receiving hole for receiving the lower end of the exhaust valve biasing spring. In an internal combustion engine in which a hole and an oil drop hole are formed,
An oil guide groove is formed in the upper wall surface of the cylinder head, extending between these spring receiving holes and extending from at least one of the spring receiving holes to the oil drop hole.

〔作　用］ ばね受容孔内のオイルはオイル案内溝を介してオイル落
し孔へ排出される。[Function] Oil in the spring receiving hole is discharged to the oil drop hole via the oil guide groove.

［実施例］ 第１図から第５図は２サイクルデイ一ゼル機関のシリン
ダへ・ンドを示している。[Embodiment] Figures 1 to 5 show the cylinder connections of a two-stroke diesel engine.

第１図から第５図を参照すると、１はシリンダヘッド、
２は各気筒毎に二つずつ設けられた給気弁、３は給気ポ
ート、４は各気筒毎に二つずつ設けられた排気弁、５は
排気ポート、６は噴ロアを具えた予燃焼室、８は燃料噴
射弁、９はシリンダへラド１内に形成された冷却水通路
を夫々示す。Referring to FIGS. 1 to 5, 1 is a cylinder head;
2 is an air intake valve provided for each cylinder with two intake valves, 3 is an intake port, 4 is an exhaust valve provided for each cylinder with two exhaust valves, 5 is an exhaust port, and 6 is a pilot equipped with an injection lower. A combustion chamber, 8 a fuel injection valve, and 9 a cooling water passage formed in the cylinder rad 1, respectively.

シリンダヘッド１の上壁面１０はほぼ平坦をなし、この
シリンダヘッド上壁面１０上には給気弁付勢用ばね１１
の下端部を受容する受容孔１２と、排気弁付勢用ばね１
３の下端部を受容する受容孔１４とが形成される。第２
図に示されるように給気弁２は図示しないカムシャフト
によりロッカーアーム１５を介して駆動され、排気弁４
はカムシャフトにより二叉状ロッカーアーム１６を介し
て駆動される。ロッカーアーム１５はピボット１７を中
心として回動し、このビボッ）１７に対する支承部が第
１図および第５図において符号１８で示される。また、
ロッカーアーム１６はピボット１９を中心として回動し
、このピボット１９に対する支承部が第１図において符
号２０で示される。第１図および第５図かられかるよう
にビボッ目７に対する支承部１８はシリンダヘッド土壁
面１０から突出する突起２１上に形成されており、これ
ら突起２１の上端部および各突起２１の上端部と隣接す
るヘッドボルト孔２２のボス部２３は夫々橋絡部２４　
、２５を介して互いに連結されている。第１図に示され
るように各ヘッドボルト孔２２の側方には夫々側のヘッ
ドボルト孔２６が形成されており、互いに隣接するヘッ
ドボルト孔２２とヘッドボルト孔２６間にはカムシャフ
トに対する支承部２７が形成されている。更に第１図お
よび第２図に示されるように橋絡部２４　、２５に関し
て排気弁４と反対側のシリンダヘッド上壁面１０上には
垂直方向に延びるオイル落し孔２８が形成されている。The upper wall surface 10 of the cylinder head 1 is substantially flat, and the air supply valve biasing spring 11 is mounted on the upper wall surface 10 of the cylinder head 1.
a receiving hole 12 for receiving the lower end of the exhaust valve biasing spring 1;
A receiving hole 14 is formed for receiving the lower end of 3. Second
As shown in the figure, the intake valve 2 is driven by a camshaft (not shown) via a rocker arm 15, and the exhaust valve 4 is driven by a rocker arm 15.
is driven by a camshaft via a forked rocker arm 16. The rocker arm 15 pivots about a pivot 17, the bearing for which is indicated at 18 in FIGS. 1 and 5. Also,
The rocker arm 16 pivots about a pivot 19, the bearing for which is indicated at 20 in FIG. As can be seen from FIGS. 1 and 5, the support portion 18 for the pivot eye 7 is formed on protrusions 21 protruding from the cylinder head soil wall surface 10, and the upper ends of these protrusions 21 and the upper ends of each protrusion 21 The boss portions 23 of the head bolt holes 22 adjacent to the respective bridging portions 24
, 25. As shown in FIG. 1, a head bolt hole 26 is formed on each side of each head bolt hole 22, and a support for the camshaft is provided between the adjacent head bolt holes 22 and 26. A portion 27 is formed. Further, as shown in FIGS. 1 and 2, an oil drop hole 28 extending vertically is formed on the cylinder head upper wall surface 10 on the opposite side from the exhaust valve 4 with respect to the bridge portions 24 and 25.

第１図および第２図に示されるようにばね受容孔１２と
ばね受容孔１４間のシリンダヘッド上壁面１０上にはこ
れらばね受容孔１２とばね受容孔１４を連結するオイル
案内溝２９が形成される。また、第１図、第３図および
第４図に示されるように一対のばね受容孔１４間のシリ
ンダヘッド上壁面１０上にはこれらばね受容孔１４を互
いに連結するオイル案内溝３０が形成される。更に、第
１図、第２図および第５図に示されるようにばね受容孔
１４とオイル落し孔２８間のシリンダヘッド上壁面１０
上にはこれらばね受容孔１４とオイル落し孔２８とを連
結するオイル案内溝３０が形成される。第１図から第５
図に示す実施例ではオイル案内溝３０とオイル案内溝３
１とはほぼ同じ深さを有し、オイル案内溝２９はこれら
オイル案内溝３０　、３１よりも若干浅く形成されてい
る。As shown in FIGS. 1 and 2, an oil guide groove 29 is formed on the upper wall surface 10 of the cylinder head between the spring receiving hole 12 and the spring receiving hole 14 to connect the spring receiving hole 12 and the spring receiving hole 14. be done. Further, as shown in FIGS. 1, 3, and 4, an oil guide groove 30 is formed on the upper wall surface 10 of the cylinder head between the pair of spring receiving holes 14 to connect these spring receiving holes 14 to each other. Ru. Further, as shown in FIGS. 1, 2, and 5, the cylinder head upper wall surface 10 between the spring receiving hole 14 and the oil drop hole 28
An oil guide groove 30 is formed above to connect the spring receiving hole 14 and the oil drop hole 28. Figures 1 to 5
In the embodiment shown in the figure, the oil guide groove 30 and the oil guide groove 3
1, and the oil guide groove 29 is formed slightly shallower than the oil guide grooves 30 and 31.

このように各ばね受容孔１２　、１４はオイル案内溝２
９゜３０　、３１を介してオイル落し孔２８に連結され
ているので各ばね受容孔１２．１４内に流入したオイル
はオイル案内溝２９　、３０　、３１を介してオイル落
し孔２８内に排出される。その結果、各ばね受容孔１２
　、１４内にはさほどオイルが溜まることがないのでオ
イルかばね１１　、１３の伸縮作用に抵抗を与えること
がなく、またばね１１　、１３の伸縮作用によってオイ
ル内にさほど気泡が発生しなくなる。In this way, each spring receiving hole 12, 14 has an oil guide groove 2.
Since the spring receiving holes 12 and 14 are connected to the oil drop hole 28 through the spring receiving holes 12 and 31, the oil flowing into each spring receiving hole 12 and 14 is discharged into the oil drop hole 28 through the oil guide grooves 29, 30 and 31. Ru. As a result, each spring receiving hole 12
, 14, so there is no resistance to the expansion and contraction of the oil springs 11 and 13, and the expansion and contraction of the springs 11 and 13 prevents the generation of air bubbles in the oil.

各オイル案内溝２９　、３０　、３１はコ字形断面形状
をなしており、第４図に示されるようにオイル案内溝３
０周りのシリンダヘッド部分３２はコ字形のリブ形状を
有する。このようなリブ３２は第１図において破線で示
すように他の各オイル案内溝２９　、３１に対しても形
成されており、従って各ばね受容部１２゜１４はリブ３
２を介して互いに連結されている形となる。各ばね受容
部１２　、１４には強力なばね力が作用するが各ばね受
容部１２　、１４間をリブ３２により互いに連結するこ
とによって各ばね受容部１２．１４が補強され、斯くし
て各ばね受容部１２　、１４の耐久性を向上させること
ができる。更にばね受容孔１４からλイル落し孔２８ま
で延びるリブ３２は第５図に示されるようにヘッドボル
ト孔２２のボス部２３に一体的に結合され、更に第２図
に示されるようにオイル落し孔２８のボス部３３に一体
的に結合されるので各ばね受容孔１２　、１４はこのリ
ブ３２およびこのリブ３２に連結された他のリブ３２に
よって更に補強されることになる。Each oil guide groove 29, 30, 31 has a U-shaped cross section, and as shown in FIG.
The cylinder head portion 32 around 0 has a U-shaped rib shape. Such a rib 32 is also formed for each of the other oil guide grooves 29 and 31 as shown by the broken line in FIG.
They are connected to each other via 2. Although a strong spring force acts on each spring receiving part 12, 14, each spring receiving part 12, 14 is reinforced by connecting each spring receiving part 12, 14 with each other by a rib 32, and thus each spring receiving part 12, 14 is reinforced. The durability of the receiving parts 12 and 14 can be improved. Further, a rib 32 extending from the spring receiving hole 14 to the oil drop hole 28 is integrally connected to the boss portion 23 of the head bolt hole 22 as shown in FIG. Since it is integrally connected to the boss portion 33 of the hole 28, each spring receiving hole 12, 14 is further reinforced by this rib 32 and the other rib 32 connected to this rib 32.

〔発明の効果〕〔Effect of the invention〕

オイルによって給排気弁付勢用ばねが受ける抵抗を低減
でき、更にオイルに気泡が発生するのを抑制することが
できる。The resistance exerted by the oil on the supply/exhaust valve biasing spring can be reduced, and the generation of bubbles in the oil can also be suppressed.

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

第１図は給排気弁を取除いたところを示すシリンダヘッ
ドの平面図、第２図は第１図の■−■線に沿ってみた断
面図、第３図は第１図の■−■線に沿ってみた断面図、
第４図は第１図のＩＶ−ＩＶ線に沿ってみた断面図、第
５図は第１図のＶ−Ｖ線に沿ってみた断面図である。 ２・・・給気弁、　　　　　　４・・・排気弁、１０・
・・シリンダヘッド上壁面、 １２　、１４・・・ばね受容孔、　　２８・・・オイル
落し孔、２９　、３０　、３１・・・オイル案内溝。Figure 1 is a plan view of the cylinder head with the supply and exhaust valves removed, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is the line ■-■ in Figure 1. A cross-sectional view along the line,
4 is a sectional view taken along line IV--IV in FIG. 1, and FIG. 5 is a sectional view taken along line V-V in FIG. 1. 2...Air supply valve, 4...Exhaust valve, 10.
... Cylinder head upper wall surface, 12 , 14 ... Spring receiving hole, 28 ... Oil drop hole, 29 , 30 , 31 ... Oil guide groove.

Claims (1)

【特許請求の範囲】[Claims] シリンダヘッド上壁面に給気弁付勢用ばねの下端部を受
容するばね受容孔と、排気弁付勢用ばねの下端部を受容
するばね受容孔と、オイル落し孔とを形成した内燃機関
において、これらのばね受容孔間を延びると共に少くと
も一方のばね受容孔からオイル落し孔まで延びるオイル
案内溝をシリンダヘッド上壁面に形成したシリンダヘッ
ドのオイル通路構造。In an internal combustion engine in which a spring receiving hole for receiving the lower end of the intake valve biasing spring, a spring receiving hole for receiving the lower end of the exhaust valve biasing spring, and an oil drop hole are formed in the upper wall surface of the cylinder head. A cylinder head oil passage structure in which an oil guide groove is formed on the upper wall surface of the cylinder head, extending between these spring receiving holes and extending from at least one of the spring receiving holes to the oil drop hole.
JP23237490A 1990-09-04 1990-09-04 Oil path structure of cylinder head Pending JPH04112910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23237490A JPH04112910A (en) 1990-09-04 1990-09-04 Oil path structure of cylinder head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23237490A JPH04112910A (en) 1990-09-04 1990-09-04 Oil path structure of cylinder head

Publications (1)

Publication Number Publication Date
JPH04112910A true JPH04112910A (en) 1992-04-14

Family

ID=16938227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23237490A Pending JPH04112910A (en) 1990-09-04 1990-09-04 Oil path structure of cylinder head

Country Status (1)

Country Link
JP (1) JPH04112910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201538B2 (en) 2006-05-22 2012-06-19 Honda Motor Co., Ltd. Cylinder head oil passage structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201538B2 (en) 2006-05-22 2012-06-19 Honda Motor Co., Ltd. Cylinder head oil passage structure

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