JPS6026175Y2 - 4-cycle engine breather device - Google Patents
4-cycle engine breather deviceInfo
- Publication number
- JPS6026175Y2 JPS6026175Y2 JP19030681U JP19030681U JPS6026175Y2 JP S6026175 Y2 JPS6026175 Y2 JP S6026175Y2 JP 19030681 U JP19030681 U JP 19030681U JP 19030681 U JP19030681 U JP 19030681U JP S6026175 Y2 JPS6026175 Y2 JP S6026175Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve chamber
- breather device
- chamber
- breather
- valve
- 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
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案は４サイクルエンジンのブリーザ装置の改善に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a breather device for a four-stroke engine.
第１図は従来の側弁式空冷エンジンの弁室周辺を示す断
面図である。FIG. 1 is a sectional view showing the vicinity of a valve chamber of a conventional side valve type air-cooled engine.
図において、１はシリンダで、クランクケース２と一体
鋳造されている。In the figure, 1 is a cylinder, which is integrally cast with the crankcase 2.
３は弁室で、クランクケース２との仕切壁４は開口端に
おいて段差となり、傾斜壁５にはブリーザ孔６が鋳抜き
で形成されている。Reference numeral 3 denotes a valve chamber, and a partition wall 4 between it and the crankcase 2 has a step at its opening end, and a breather hole 6 is formed in the inclined wall 5 by casting.
７は弁軸ガイドである。7 is a valve stem guide.
傾斜壁５が弁室３の鋳抜き方向と同一方向に鋳抜けるよ
うに構成されてい名ため、ブリーザ孔６も同時に鋳抜き
穴として形成されることから、ブリーザ孔を形成するた
めのキリ加工が不要となる効果がある。Since the inclined wall 5 is configured to be cast in the same direction as the direction in which the valve chamber 3 is cast, the breather hole 6 is also formed as a cast hole at the same time, so drilling is required to form the breather hole. This has the effect of making it unnecessary.
しかし、ブリーザ孔６が弁室３の開口軸方向と平行する
ほぼ水平な孔のため、ブローバイガスが直ちにカバー取
付部８の開口面に直進するため、潤滑油もガスと共に排
出されて、カバー取付部８の周辺を汚染する不具合があ
る。However, since the breather hole 6 is a substantially horizontal hole parallel to the opening axis direction of the valve chamber 3, the blow-by gas immediately goes straight to the opening surface of the cover mounting part 8, so the lubricating oil is also discharged together with the gas, and the cover is mounted. There is a problem that the area around the part 8 is contaminated.
本考案の目的は上記欠点を排除したブリーザ装置を提供
することであり、その特徴とするところは、クランクケ
ースとシリンダとを一体に形成した４サイクルエンジン
において、クランク室と弁室との仕切壁の同弁室の開口
部の一部に同弁室と同時鋳抜きで形成された凹陥部、同
凹陥部の鋳抜き方向とほぼ直角方向に同凹陥部に形成さ
れクランク室と連絡するブリーザ孔を備えたことである
。The purpose of the present invention is to provide a breather device that eliminates the above-mentioned drawbacks.The feature is that the partition wall between the crank chamber and the valve chamber is used in a four-stroke engine in which the crankcase and cylinder are integrally formed. A recessed part is formed in a part of the opening of the same valve chamber by simultaneous casting with the same valve chamber, and a breather hole is formed in the same recessed part in a direction almost perpendicular to the casting direction of the same recessed part and communicates with the crank chamber. This means that we have the following.
以下図面を参照して本考案による実施例につき説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第２図は本考案による１実施例のブリーザ装置を設けた
側弁穴空、冷エンジンを示す正面図、第３図は第２図の
■−■矢視断面図、第４図は第２図の■矢視図、第５図
は第３図の■−■矢視断面図、第６図は第４図のＶＩ−
ＶＩ矢視断面図、第７図は第４図の■−■矢視断面図で
ある。Fig. 2 is a front view showing a cold engine with an empty side valve hole provided with an embodiment of the breather device according to the present invention, Fig. 3 is a cross-sectional view taken along the arrow ■-■ in Fig. 2, and Fig. 4 is a Figure 5 is a sectional view taken along the ■--■ arrow in Figure 3, and Figure 6 is a VI-- in Figure 4.
7 is a cross-sectional view taken along the line ■--■ in FIG. 4.
図において、１はシリンダ、２はクランクケースである
。In the figure, 1 is a cylinder and 2 is a crankcase.
従来のものとの差異について説明する。The differences from the conventional one will be explained.
１１は弁室で、クランクケースのクランク室２ａとの仕
切壁１２は、開口部の一部に凹陥部１３が弁室１１と同
時鋳抜き（抜き方向Ａ）で形成されている。Reference numeral 11 denotes a valve chamber, and a recessed portion 13 is formed in a part of the opening of a partition wall 12 of the crankcase from the crank chamber 2a, which is cast simultaneously with the valve chamber 11 (in the drawing direction A).
１４は仕切壁で、弁軸ガイド７とカバー取付部８を連絡
する。A partition wall 14 connects the valve shaft guide 7 and the cover mounting portion 8.
１５はブリーザ孔で、第５図に示すように、型１６を弁
室１１のＡ方向への鋳抜きと、型１７をクランクケース
２のＢ方向への鋳抜きにより形成されている。Reference numeral 15 denotes a breather hole, which is formed by casting a die 16 in the direction A of the valve chamber 11 and casting a die 17 in the direction B of the crankcase 2, as shown in FIG.
上記構成の場合の作用、効果について述べる。The functions and effects of the above configuration will be described.
ブローパイガスはクランク室２ａからブリーザ孔１５を
経て、凹陥部１３へ入り、９０°Ｃ方向転換後、カバー
（図示せず）へ導かれるため、潤滑油成分は完全に分離
されて、ガス成分のみが排出されることにより、従来の
不具合は解消される。Blow pie gas enters the concave portion 13 from the crank chamber 2a through the breather hole 15, and after changing direction by 90°C, is led to the cover (not shown), so the lubricating oil component is completely separated and only the gas component is left. By being discharged, the conventional problems are resolved.
第８図は本考案による他の実施例の装置を示す説明図で
あり、前記実施例と異なる点は、凹陥部１８が図示のよ
うに設けられ、ブリーザ孔がカバー取付部８に対して傾
傾斜して形成されている。FIG. 8 is an explanatory diagram showing another embodiment of the device according to the present invention, which differs from the previous embodiment in that a recessed portion 18 is provided as shown, and the breather hole is inclined with respect to the cover mounting portion 8. It is formed at an angle.
その作用、効果は前記の実施例と同じである。Its action and effect are the same as those of the previous embodiment.
第１図は従来の側弁式空冷エンジンの弁室周辺を示す断
面図、第２図は本考案による１実施例のブリーザ装置を
設けた側弁式空冷エンジンの正面図、第３図は第２図の
■−■矢視断面図、第４図は第２図の■矢視図、第５図
は第３図の■−■矢視断面図、第６図は第４図のＶＩ−
ＶＩ矢視断面図、第７図は第４図の■−■矢視断面図、
第８図は本考案による他の実施例の装置を示す説明図で
ある。
１・・・・・・シリンダ、２・・・・・・クランクケー
ス、２ａ・・・・・・クランク室、１１・・・・・・弁
室、１２，１４・・・・・・仕切壁、１３・・・・・・
凹陥部、１５・・・・・・ブリーザ孔。FIG. 1 is a cross-sectional view showing the vicinity of the valve chamber of a conventional side-valve air-cooled engine, FIG. 2 is a front view of a side-valve air-cooled engine equipped with an embodiment of the breather device according to the present invention, and FIG. 2 is a cross-sectional view taken along the ■-■ arrow in FIG. 2, FIG. 4 is a cross-sectional view taken along the ■-■ arrow in FIG.
VI arrow sectional view, Figure 7 is the ■-■ arrow sectional view of Figure 4,
FIG. 8 is an explanatory diagram showing another embodiment of the device according to the present invention. 1... Cylinder, 2... Crank case, 2a... Crank chamber, 11... Valve chamber, 12, 14... Partition wall , 13...
Concave portion, 15...breather hole.
Claims (1)
ルエンジンにおいて、クランク室と弁室との仕切壁の同
弁室の開口部の一部に同弁室と同時鋳抜きで形成された
凹陥部、同凹陥部の鋳抜き方向とほぼ直角方向に凹陥部
に形成されクランク室と連絡するブリーザ孔を備えたと
を特徴とする４サイクルエンジンのブリーザ装置。In a four-stroke engine in which the crankcase and cylinder are integrally formed, a recessed part is formed in a part of the opening of the valve chamber of the partition wall between the crank chamber and the valve chamber by simultaneous casting with the same valve chamber. 1. A breather device for a four-stroke engine, comprising a breather hole formed in the recess in a direction substantially perpendicular to the casting direction of the recess and communicating with a crank chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19030681U JPS6026175Y2 (en) | 1981-12-22 | 1981-12-22 | 4-cycle engine breather device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19030681U JPS6026175Y2 (en) | 1981-12-22 | 1981-12-22 | 4-cycle engine breather device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5894807U JPS5894807U (en) | 1983-06-27 |
| JPS6026175Y2 true JPS6026175Y2 (en) | 1985-08-07 |
Family
ID=30103893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19030681U Expired JPS6026175Y2 (en) | 1981-12-22 | 1981-12-22 | 4-cycle engine breather device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6026175Y2 (en) |
-
1981
- 1981-12-22 JP JP19030681U patent/JPS6026175Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5894807U (en) | 1983-06-27 |
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