JPS6117213Y2 - - Google Patents
Info
- Publication number
- JPS6117213Y2 JPS6117213Y2 JP12770279U JP12770279U JPS6117213Y2 JP S6117213 Y2 JPS6117213 Y2 JP S6117213Y2 JP 12770279 U JP12770279 U JP 12770279U JP 12770279 U JP12770279 U JP 12770279U JP S6117213 Y2 JPS6117213 Y2 JP S6117213Y2
- Authority
- JP
- Japan
- Prior art keywords
- blazer
- valve
- intake
- wall
- partition wall
- 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.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 18
- NUFNQYOELLVIPL-UHFFFAOYSA-N acifluorfen Chemical compound C1=C([N+]([O-])=O)C(C(=O)O)=CC(OC=2C(=CC(=CC=2)C(F)(F)F)Cl)=C1 NUFNQYOELLVIPL-UHFFFAOYSA-N 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
この考案は強制空冷式のＬ頭形側弁エンジンに
関する。[Detailed Description of the Invention] This invention relates to a forced air-cooled L-head side valve engine.
この型式のエンジンでは、第１図に示すよう
に、吸・排気両ポート１，２の下半周壁とタペツ
ト室３の上壁との間に、吸排気ブロツクを冷却す
るための冷却風路４が形成される。この冷却風路
４は上記の両ポート１，２間の鋳抜き空間を介し
て大気と連通する。そのため、冷却風路４を通過
する冷却風の大半は鋳抜き空間から側外方へ吹き
抜け冷却に寄与しない。 In this type of engine, as shown in FIG. 1, a cooling air passage 4 is provided between the lower half circumferential wall of both the intake and exhaust ports 1 and 2 and the upper wall of the tappet chamber 3 to cool the intake and exhaust blocks. is formed. This cooling air passage 4 communicates with the atmosphere through the cast space between the ports 1 and 2 mentioned above. Therefore, most of the cooling air passing through the cooling air passage 4 does not contribute to cooling by blowing outward from the casting space.
上記の問題点を解消するために、本出願人は、
ブレザカバー５の上面から仕切壁６を突設し、こ
れで鋳抜き空間を塞ぐようにしたものを既に実施
している。が、これでは一個のブレザカバー５を
僅かづつ排気量の異る数種のエンジンに共用する
ようにしていたこと、及びブレザカバー５が鋳物
製品又はプレス製品のいずれの場合でも、成形
性、加工性等を考慮して、仕切壁６をほぼ真直に
形成するようにしていたことなどから、仕切壁６
と吸・排気両ポート１，２とに大きな隙間が生
じ、冷却風が吹き出る問題があつた。 In order to solve the above problems, the applicant:
A partition wall 6 is provided protruding from the upper surface of the blazer cover 5 to close the casting space. However, with this, one blazer cover 5 is commonly used for several types of engines with slightly different displacements, and whether the blazer cover 5 is a cast product or a pressed product, moldability, workability, etc. Considering that the partition wall 6 was formed almost straight, the partition wall 6
A large gap was created between the intake and exhaust ports 1 and 2, causing the problem of cooling air blowing out.
この考案は、ブレザカバーとは異り加工上の制
約を殆んど受けないブレザ弁基板に前記の仕切壁
を一体に形成し、しかも仕切壁を鋳抜き空間の内
側に位置させることにより、上記の問題点を解消
するものである。 This idea has the above-mentioned partition wall integrally formed with the blazer valve board, which is not subject to any processing restrictions unlike the blazer cover, and by locating the partition wall inside the casting space, the above-mentioned effect can be achieved. This solves the problem.
以下この考案の実施例を図面に基ずき説明す
る。 Examples of this invention will be described below based on the drawings.
第２図は強制空冷式のＬ頭形側弁エンジンの要
部縦断面図、第３図及び第４図はそれぞれ第２図
−線及び−線に沿う断面図である。この
エンジンはクランクケース１１とシリンダ１２を
ダイキヤスト鋳造法により一体に鋳込み形成し、
それらの前側に冷却フアン１３及び導風ケース１
４からなる冷却装置を配設し、シリンダ１２の一
側に吸排気ブロツクＢを形成して、ここからクラ
ンク室１５内のカム軸１６に亘つて動弁装置Ｖを
配設している。１７はシリンダヘツドである。 FIG. 2 is a longitudinal cross-sectional view of a main part of a forced air-cooled L-head type side valve engine, and FIGS. 3 and 4 are cross-sectional views taken along lines - and -, respectively, in FIG. This engine has a crankcase 11 and a cylinder 12 integrally formed by die-casting.
A cooling fan 13 and a wind guide case 1 are placed in front of them.
An intake/exhaust block B is formed on one side of the cylinder 12, and a valve train V is disposed extending from the intake/exhaust block B to the camshaft 16 in the crank chamber 15. 17 is a cylinder head.
吸排気ブロツクＢには、吸気ポート１８と排気
ポート１９が横向きに開口する状態で左右に並べ
て配設してある。そして、吸・排気両ポート１
８，１９の下半周壁とタペツト室２０の上壁との
間に冷却風路２１を形成し、ここを通過する冷却
風で吸排気ブロツクＢを冷却するよう構成してい
る。冷却風路２１は、吸・排気両ポート１８，１
９の下半周壁とタペツト室２０の上壁とで囲まれ
る鋳抜き空間Ｓによつて分断されている。２２は
冷却風路２１の入口を示す。 In the intake/exhaust block B, an intake port 18 and an exhaust port 19 are arranged side by side in a state of opening laterally. And both intake and exhaust ports 1
A cooling air passage 21 is formed between the lower half circumferential walls 8, 19 and the upper wall of the tappet chamber 20, and the intake/exhaust block B is cooled by the cooling air passing through this passage. The cooling air passage 21 has both intake and exhaust ports 18,1
It is divided by a casting space S surrounded by the lower half peripheral wall of the tappet chamber 9 and the upper wall of the tappet chamber 20. 22 indicates the entrance of the cooling air passage 21.
第２図に示すように、タペツト室２０の開口端
には、これを塞ぐ状態でリード弁式のブリザ弁２
３とブレザカバー２４が順に重ねて固定してあ
る。ブレザ弁２３は、鋼板製のブレザ弁基板２５
に、弁口２６を開閉する弁体２７と動作規制板２
８を共締め固定して構成される。 As shown in FIG. 2, a reed valve type breather valve 2 is installed at the open end of the tappet chamber 20 to close it.
3 and the blazer cover 24 are stacked and fixed in order. The breather valve 23 has a breather valve board 25 made of steel plate.
, a valve body 27 that opens and closes the valve port 26 and an operation regulating plate 2.
8 are fastened and fixed together.
前に述べた鋳抜き空間Ｓからの冷却風の吹き出
しを防ぐために、ブレザ弁基板２５の上部にこれ
を一体に仕切壁２９が形成してある。この仕切壁
２９は第３図に示すように、その上周縁部３０が
吸・排気両ポート１８，１９の周壁外面にできる
だけ接近するように山形に形成され、しかもその
板面が鋳抜き空間Ｓのなるべく内側に位置するよ
う、ブレザ弁基板２５の接合面より内側へ折曲げ
て形成してある（第２図参照）。また、上記の板
面２個所には補強用のリブ３１が形成してある。 In order to prevent cooling air from blowing out from the casting space S mentioned above, a partition wall 29 is integrally formed on the upper part of the blazer valve base plate 25. As shown in FIG. 3, this partition wall 29 is formed in a chevron shape so that its upper peripheral edge 30 is as close as possible to the outer surfaces of the peripheral walls of both the intake and exhaust ports 18 and 19, and its plate surface is located in the casting space S. It is bent inward from the bonding surface of the blazer valve board 25 so that it is positioned as inside as possible (see FIG. 2). Furthermore, reinforcing ribs 31 are formed at two locations on the plate surface.
図中符号３２は気化器である。 The reference numeral 32 in the figure is a vaporizer.
尚、仕切壁２９は第５図Ａに示すように、鉤形
に折曲げて形成しても良く、又は同図Ｂに示すよ
うに、鋳抜き空間Ｓの奥端壁に密着させ、ボルト
３３で固定するようにしても良い。 The partition wall 29 may be bent into a hook shape as shown in FIG. It may be fixed with.
以上説明したようにこの考案では、加工上の制
約がなく、しかも型代などの加工コストの安いブ
レザ弁基板と一体に仕切壁を形成するようにした
ので、鋳抜き空間を隙間なく塞ぐ最適形状に仕切
壁を形成するのが容易であるうえ、ブレザカバー
と一体に仕切壁を形成していた従前のものに比
べ、排気量の異る各エンジンごとに専用の仕切壁
を設けても、その製作コストの増加を低く仰えら
れる。 As explained above, in this design, there are no processing restrictions, and the partition wall is formed integrally with the blazer valve board, which has low processing costs such as mold fees, so it has an optimal shape that closes the casting space without any gaps. It is easy to form a partition wall on the blazer cover, and compared to the previous model where the partition wall was formed integrally with the blazer cover, it is easier to manufacture even if a dedicated partition wall is provided for each engine with a different displacement. The increase in costs is said to be low.
また、上記の仕切壁を、従前のものより鋳抜き
空間の内側に位置させて、冷却風が仕切壁を迂回
して吹き出ようとするのを妨げるようにしたの
で、鋳抜き空間を隙間なく塞ぐことと相埃つて、
冷却風の吹き出しを最大限防止して、吸排気ブロ
ツクを効果的に強力に冷却できる。これにより、
従前のこの種エンジンにおいて、吸排気ブロツク
側の冷却不足でシリンダが歪み、エンジン性能に
悪影響を及ぼすことがあつた点をも解消すること
ができる。 In addition, the above-mentioned partition wall is located inside the casting space compared to the previous one to prevent the cooling air from bypassing the partition wall and blowing out, so the casting space is completely closed. Along with that,
By preventing cooling air from blowing out to the maximum extent possible, the intake and exhaust blocks can be effectively and powerfully cooled. This results in
It is also possible to solve the problem in conventional engines of this type, where cylinders are distorted due to insufficient cooling on the intake and exhaust block side, which adversely affects engine performance.
第１図は従来例を示すエンジン要部の断面図、
第２図乃至第５図Ａ，Ｂはこの考案の実施例を示
し、第２図はエンジンの要部縦断面図、第３図及
び第４図はそれぞれ第２図−線及び−線
に沿う断面図、第５図Ａ，Ｂは別の実施例を示す
要部の断面図である。
Ｂ……吸排気ブロツク、Ｓ……鋳抜き空間、１
８……吸気ポート、１９……排気ポート、２０…
…タペツト室、２１……冷却風路、２３……ブレ
ザ弁、２４……ブレザカバー、２５……ブレザ弁
基板、２９……仕切壁。
Figure 1 is a sectional view of the main parts of an engine showing a conventional example.
Figures 2 to 5 A and B show an embodiment of this invention, with Figure 2 being a vertical cross-sectional view of the main parts of the engine, and Figures 3 and 4 taken along lines - and -, respectively, in Figure 2. 5A and 5B are cross-sectional views of main parts showing another embodiment. B... Intake and exhaust block, S... Casting space, 1
8...Intake port, 19...Exhaust port, 20...
... Tappet chamber, 21 ... Cooling air path, 23 ... Breather valve, 24 ... Breather cover, 25 ... Breather valve board, 29 ... Partition wall.
Claims (1)
ツト室２０の上壁との間に吸排気ブロツクＢを冷
却する冷却通路２１を形成し、この冷却通路２１
の途中部が吸・排気両ポート１８，１９間の鋳抜
き空間Ｓを介して外気と連通する強制空冷式のＬ
頭形側弁エンジンにおいて、タペツト室２０の開
口周縁壁にブレザ弁２３とこれの外面を覆うブレ
ザカバー２４とを順に重ねて固定し、鋳抜き空間
Ｓの側面開口を仕切壁２９で塞ぎ、この仕切壁２
９を鋳抜き空間Ｓの内側に位置させるとともに、
ブレザ弁２３を構成するブレザ弁基板２５と一体
に形成したことを特徴とする強制空冷式のＬ頭形
側弁エンジン。 A cooling passage 21 for cooling the intake/exhaust block B is formed between the lower half circumferential wall of both the intake/exhaust ports 18, 19 and the upper wall of the tappet chamber 20.
Forced air-cooled type L in which the middle part communicates with the outside air through the cast-out space S between the intake and exhaust ports 18 and 19
In the head-shaped side valve engine, a blazer valve 23 and a blazer cover 24 covering the outer surface of the blazer valve 23 are stacked and fixed in order on the opening peripheral wall of the tappet chamber 20, and the side opening of the casting space S is closed with a partition wall 29. wall 2
9 is located inside the casting space S,
A forced air-cooled L-head-shaped side valve engine, characterized in that it is integrally formed with a blazer valve base plate 25 that constitutes a blazer valve 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12770279U JPS6117213Y2 (en) | 1979-09-14 | 1979-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12770279U JPS6117213Y2 (en) | 1979-09-14 | 1979-09-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5645114U JPS5645114U (en) | 1981-04-23 |
| JPS6117213Y2 true JPS6117213Y2 (en) | 1986-05-27 |
Family
ID=29359557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12770279U Expired JPS6117213Y2 (en) | 1979-09-14 | 1979-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117213Y2 (en) |
-
1979
- 1979-09-14 JP JP12770279U patent/JPS6117213Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5645114U (en) | 1981-04-23 |
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