JPH0138252Y2 - - Google Patents
Info
- Publication number
- JPH0138252Y2 JPH0138252Y2 JP1984062988U JP6298884U JPH0138252Y2 JP H0138252 Y2 JPH0138252 Y2 JP H0138252Y2 JP 1984062988 U JP1984062988 U JP 1984062988U JP 6298884 U JP6298884 U JP 6298884U JP H0138252 Y2 JPH0138252 Y2 JP H0138252Y2
- Authority
- JP
- Japan
- Prior art keywords
- case
- blow
- head cover
- air cleaner
- cylinder head
- 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
- 238000005192 partition Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、エンジンのブローバイガスを吸気系
に還流させる主として車両用エンジンのブローバ
イガス還流装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates primarily to a blowby gas recirculation device for a vehicle engine, which recirculates engine blowby gas to an intake system.
（従来の技術）
この種装置として例えば実開昭59−60324号公
報に記載されているようにエンジンのシリンダヘ
ツドカバー内のブリーザ室をブローバイガス通路
を介してエアクリーナケースに接続するものは知
られている。(Prior Art) As a device of this kind, for example, as described in Japanese Utility Model Application Publication No. 59-60324, a device in which a breather chamber in an engine cylinder head cover is connected to an air cleaner case via a blow-by gas passage is known. ing.
（考案が解決しようとする課題）
この場合寒冷時はブローバイガス中に含まれる
水分のブローバイガス通路内での付着凍結を出ず
ることがあり、特に該通路はシリンダヘツドカバ
ー上の走行風の当り易い箇所に配置されることか
ら温度低下による凍結を生じ易い問題点があつ
た。(Problem to be solved by the invention) In this case, in cold weather, moisture contained in the blow-by gas may adhere and freeze in the blow-by gas passage. Since it is placed in a location where it can easily freeze, there was a problem that it could easily freeze due to a drop in temperature.
本考案はかゝる問題点を解決することを目的と
する。 The present invention aims to solve such problems.
（課題を解決するための手段）
上記の目的を達成するための本考案の構成はエ
ンジンのシリンダヘツドカバー内のブリーザ室
を、ブローバイガス通路を介してエアクリーナケ
ースに接続するものにおいて、前記ブローバイガ
ス通路を、前記シリンダヘツドカバーに一端で直
付けされて中間部にフイルタを介在させたチヤン
バーとしての中間フイルタケースに形成し、該中
間フイルタケースを、前記シリンダヘツドカバー
側のエアクリーナケースのダーテイサイドと大気
との間の仕切壁の側方に間隔を存して配置すると
共にエアクリーナケース上面のアツパーカバー
に、前記仕切壁より前記中間フイルタケースの上
方を越えてシリンダヘツドカバー側に延びる延設
部と、該延設部の端部から前記中間フイルタケー
スの中間部のフイルタより下方向まで垂下する垂
下部とを設け、該垂下部内側に前記エアクリーナ
ケースのダーテイ側に連なる接続部を設け、該接
続部と前記中間フイルタケース上面とを弾性通路
部材を介して接続したことを特徴とする。(Means for Solving the Problems) The structure of the present invention to achieve the above object is to connect a breather chamber in a cylinder head cover of an engine to an air cleaner case via a blow-by gas passage, in which the blow-by gas A passage is formed in an intermediate filter case as a chamber which is directly attached to the cylinder head cover at one end and has a filter interposed in the middle, and the intermediate filter case is connected to the dirty side of the air cleaner case on the cylinder head cover side and the atmosphere. and an extension part disposed on the upper cover on the upper surface of the air cleaner case, extending from the partition wall to the cylinder head cover side beyond the upper part of the intermediate filter case. , a hanging part that hangs down from the end of the extending part to below the filter in the middle part of the intermediate filter case, and a connecting part connected to the dirty side of the air cleaner case is provided inside the hanging part, and the connecting part is provided inside the hanging part. and the upper surface of the intermediate filter case are connected via an elastic passage member.
（作用）
そして本考案は前記の手段によりブローバイガ
スは膨張室内でその潤滑油分を粗分離すると共に
その水分をフイルタに吸収されて油分と水分の少
ないブローバイガスとしてエアクリーナケース内
に導入されると共にそのブローバイガス通路はエ
アクリーナケースの内外２重構造の嵌挿部で覆わ
れてシリンダヘツドカバー上の走行風によつて直
接冷却されることがないので、通路内のガスの凍
結を防止できる。(Function) According to the present invention, the lubricating oil content of the blow-by gas is roughly separated in the expansion chamber by the above-mentioned means, and the water content is absorbed by the filter, and the blow-by gas is introduced into the air cleaner case as blow-by gas with less oil and water content. The blow-by gas passage is covered with a double-walled fitting part of the air cleaner case, and is not directly cooled by the air flowing over the cylinder head cover, thereby preventing the gas in the passage from freezing.
（実施例） 以下本考案を図示の実施に付説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
図面は頭上カム弁式の車両用サイクルエンジン
に本案装置を提供した実施例を示し、１はシリン
ダヘツド、２はシリンダヘツドカバー、３は該ヘ
ツドカバー２の後方に配置したエアクリーナケー
スであり、該ヘツドカバー２の内部空間をクラン
ク室（図示せず）に連通させると共に、該ヘツド
カバー２内の上部空間に仕切板４ａで気液分離用
のブローバイガス室４を画成し、該ブリーザ室４
をブローバイガス通路５を介して該エアクリーナ
ケース３に接続し、更に図示しないがクランク室
をPCVバルブを介在させた別のブローバイガス
通路を介して該エアクリーナケース３に連なる吸
気マニホルド６に接続して従来公知の所謂PCV
（Positive Crankcase Ventilatipn）方式のブロ
ーバイガス還流装置を構成し、通常運転時は後者
のブローバイガス通路を介しての該吸気マニホル
ド６へのブローバイガスの還流と、前者のブロー
バイガス通路５を介しての該エアクリーナケース
３側からの新気の導入とが行われて、クランク室
の換気が促進されるようにした。 The drawing shows an embodiment in which the present device is applied to an overhead cam valve type vehicle cycle engine, in which 1 is a cylinder head, 2 is a cylinder head cover, 3 is an air cleaner case disposed behind the head cover 2, and the head cover is The internal space of the head cover 2 is communicated with a crank chamber (not shown), and a blow-by gas chamber 4 for gas-liquid separation is defined in the upper space of the head cover 2 by a partition plate 4a.
is connected to the air cleaner case 3 via a blow-by gas passage 5, and further, although not shown, the crank chamber is connected to an intake manifold 6 connected to the air cleaner case 3 via another blow-by gas passage with a PCV valve interposed therebetween. Conventionally known so-called PCV
(Positive Crankcase Ventilatipn) type blow-by gas recirculation device is configured, and during normal operation, blow-by gas is recirculated to the intake manifold 6 via the latter blow-by gas passage, and blow-by gas is recirculated to the intake manifold 6 via the former blow-by gas passage 5. Fresh air is introduced from the air cleaner case 3 side to promote ventilation of the crank chamber.
ここで高負荷運転時等は、該ブローバイガス通
路５を介して該エアクリーナケース３側のブロー
バイガスが還流されるが、該通路５は該ヘツドカ
バー２上の走行風等を受け易い箇所に配置される
ことから、このままでは寒冷時該通路５内でのブ
ローバイガス中の水分の付着凍結を生じ易くな
る。 During high-load operation, the blowby gas on the air cleaner case 3 side is recirculated through the blowby gas passage 5, but the passage 5 is arranged at a location on the head cover 2 where it is likely to receive wind from the vehicle. Therefore, if left as is, moisture in the blow-by gas is likely to adhere and freeze in the passage 5 during cold weather.
そこで図示の実施例では本考案の特徴とすると
ころに従い、該通路５は、ヘツドカバー２に直付
けされて、その中間部にフイルタ７を内蔵する膨
張ケース８に形成し、又エアクリーナケース３の
シリンダヘツドカバー２側の壁部即ち前壁部を内
外２重構造の嵌挿部とし、その内壁部３ａと外壁
部３ｂとの間の空間に、間隔を存して該膨張ケー
ス８を嵌挿し、その外壁部３ｂは膨張ケース８の
上方よりヘツドカバー２に向けて下方に延出して
フイルタ７を完全に覆うようにケース８を覆い、
該外壁部３ｂを防風板として機能させて該ケース
８に走行風等から直接当らないようにした。又膨
張ケース８はエアクリーナケース３の嵌挿部の上
壁に設けた接続部３ｃにゴム製その他の弾性通路
部材９を介して弾性的に接合させた。 Therefore, in the illustrated embodiment, in accordance with the features of the present invention, the passage 5 is formed in an expansion case 8 that is directly attached to the head cover 2 and has a filter 7 built in in the middle thereof, and is formed in the cylinder of the air cleaner case 3. The wall portion on the side of the head cover 2, that is, the front wall portion, is made into an insertion portion with an inner and outer double structure, and the expansion case 8 is inserted into the space between the inner wall portion 3a and the outer wall portion 3b with a gap, The outer wall portion 3b extends downward from above the expansion case 8 toward the head cover 2 and covers the case 8 so as to completely cover the filter 7.
The outer wall portion 3b is made to function as a windbreak plate to prevent the case 8 from being directly hit by the driving wind. Further, the expansion case 8 is elastically connected to a connecting portion 3c provided on the upper wall of the insertion portion of the air cleaner case 3 via an elastic passage member 9 made of rubber or other material.
なおエンジン１は前傾エンジンとし、そのヘツ
ドカバー２内のブリーザ室４も前傾に形成すると
共にブリーザ室４の後部のヘツドカバー２の上面
に膨張ケース８も直付けして該ケース８も前傾と
し、外壁部３ｂもケース８に対応して前傾させ、
かくてブローバイガス４の後部及び膨張ケース８
への水の浸入を防止すると共に前傾の外壁部３ｂ
はその内部の膨張ケース８への走行風の流れを有
効に防止してその保温性を高めるようにした。 The engine 1 is a forward-tilting engine, and the breather chamber 4 in the head cover 2 is also formed to be tilted forward.The expansion case 8 is also attached directly to the upper surface of the head cover 2 at the rear of the breather chamber 4, so that the case 8 is also tilted forward. , the outer wall portion 3b is also tilted forward corresponding to the case 8,
Thus, the rear part of the blow-by gas 4 and the expansion case 8
The outer wall portion 3b is tilted forward and prevents water from entering.
is designed to effectively prevent the flow of running air to the expansion case 8 inside the expansion case 8, thereby increasing its heat retention.
（考案の効果）
この様に本考案によるときはシリンダヘツドカ
バー２とエアクリーナケース３とを接続するブロ
ーバイガス通路５は、これをシリンダヘツドカバ
ー２に一端を直付けされて中間部にフイルタ７を
介在させたチヤンバーとしての中間フイルタケー
ス８に形成したからブローバイガス通路５は油分
と水分との分離効果の優れた通路に形成すること
ができ而も該中間フイルタケース８をシリンダヘ
ツドカバー２側のエアクリーナケース３のダーテ
イサイド３ｄと大気との間の仕切壁３ａの側方に
間隔を存して配置すると共に、前記エアクリーナ
ケース３の上面のアツパーカバー３ｅに、前記仕
切壁３ａより前記中間フイルタケース８の上方を
越えて、シリンダヘツドカバー２側の延びる延設
部３ｆと該延設部３ｆの端部から前記中間フイル
タケース８の中間のフイルタ７より下方向まで垂
下する垂下部３ｂとを設けたものであるからフイ
ルタ７を介在させた中間フイルタケース８の大部
分はアツパーカバー３ｅから延びる垂下部３ｂに
より覆われてブローバイガス通路５内での凍結を
防止することができ、更に垂下部３ｂ内側にはエ
アクリーナケース３のダーテイサイド３ｄ側に連
なる接続部３ｃを設け、該接続部３ｃと前記中間
フイルタケース８上面とを弾性通路部材９を介し
て接続したから接続通路が短かく形成されると共
に中間フイルタケース８はエンジンの振動を受け
ることなくエアクリーナケース３に接続されて接
続部のシール性を損うことなく簡単に接続されて
その組付工数を大幅に削減することができる等の
効果を有する。(Effect of the invention) As described above, according to the invention, the blow-by gas passage 5 that connects the cylinder head cover 2 and the air cleaner case 3 has one end directly attached to the cylinder head cover 2 and a filter 7 in the middle. Since the blow-by gas passage 5 is formed in the intermediate filter case 8 as an intervening chamber, the blow-by gas passage 5 can be formed into a passage with excellent oil and moisture separation effect. The intermediate filter case is arranged with a space between the dirty side 3d of the air cleaner case 3 and the atmosphere on the side of the partition wall 3a, and the intermediate filter case 8, an extending portion 3f extending on the cylinder head cover 2 side, and a hanging portion 3b hanging down from the end of the extending portion 3f to below the intermediate filter 7 of the intermediate filter case 8. Since most of the intermediate filter case 8 with the filter 7 interposed therebetween is covered by the hanging part 3b extending from the upper cover 3e, freezing in the blow-by gas passage 5 can be prevented. 3b is provided with a connecting portion 3c connected to the dirty side 3d of the air cleaner case 3, and the connecting portion 3c and the upper surface of the intermediate filter case 8 are connected via an elastic passage member 9, so that the connecting passage is formed short. At the same time, the intermediate filter case 8 is connected to the air cleaner case 3 without being subjected to engine vibrations, and is easily connected without impairing the sealing performance of the connection part, thereby greatly reducing the number of assembly steps. has.
図面は本案装置を具備するエンジンの要部の截
断側面図である。
２……シリンダヘツドカバー、３……エアクリ
ーナケース、３ａ……内壁部、３ｂ……外壁部、
３ｃ……接続部、５……ブローバイガス通路、７
……フイルタ、８……膨張ケース、９……弾性通
路部材。
The drawing is a cutaway side view of the main parts of an engine equipped with the device of the present invention. 2...Cylinder head cover, 3...Air cleaner case, 3a...Inner wall part, 3b...Outer wall part,
3c... Connection portion, 5... Blow-by gas passage, 7
... Filter, 8 ... Expansion case, 9 ... Elastic passage member.
Claims (1)
室を、ブローバイガス通路を介してエアクリーナ
ケースに接続するものにおいて、前記ブローバイ
ガス通路を、前記シリンダヘツドカバーに一端で
直付けされて中間部にフイルタを介在させたチヤ
ンバーとしての中間フイルタケースに形成し、該
中間フイルタケースを、前記シリンダヘツドカバ
ー側のエアクリーナケースのダーテイサイドと大
気との間の仕切壁の側方に間隔を存して配置する
と共に前記エアクリーナケース上面のアツパーカ
バーに、前記仕切壁より前記中間フイルタケース
の上方を越えてシリンダヘツドカバー側に延びる
延設部と、該延設部の端部から前記中間フイルタ
ケースの中間部のフイルタより下方向まで垂下す
る垂下部とを設け、該垂下部内側に前記エアクリ
ーナケースのダーテイ側に連なる接続部を設け、
該接続部と前記中間フイルタケース上面とを弾性
通路部材を介して接続したことを特徴とするエン
ジンのブローバイガス還流装置。 A breather chamber in a cylinder head cover of an engine is connected to an air cleaner case via a blow-by gas passage, wherein the blow-by gas passage is directly connected to the cylinder head cover at one end, with a filter interposed in the middle. An intermediate filter case is formed as a chamber, and the intermediate filter case is arranged with a gap between the partition wall between the dirty side of the air cleaner case on the cylinder head cover side and the atmosphere, and the upper surface of the air cleaner case. The upper cover includes an extending portion extending from the partition wall to the cylinder head cover side beyond the upper part of the intermediate filter case, and from an end of the extending portion downward from the filter in the middle portion of the intermediate filter case. and a connecting portion connected to the dirty side of the air cleaner case is provided inside the hanging portion,
A blow-by gas recirculation device for an engine, characterized in that the connecting portion and the upper surface of the intermediate filter case are connected via an elastic passage member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6298884U JPS60175812U (en) | 1984-05-01 | 1984-05-01 | Engine blow-by gas recirculation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6298884U JPS60175812U (en) | 1984-05-01 | 1984-05-01 | Engine blow-by gas recirculation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60175812U JPS60175812U (en) | 1985-11-21 |
| JPH0138252Y2 true JPH0138252Y2 (en) | 1989-11-16 |
Family
ID=30592716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6298884U Granted JPS60175812U (en) | 1984-05-01 | 1984-05-01 | Engine blow-by gas recirculation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60175812U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6070984B2 (en) * | 2012-10-30 | 2017-02-01 | ダイハツ工業株式会社 | Internal structure of internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5510600U (en) * | 1979-06-22 | 1980-01-23 | ||
| JPS5939710B2 (en) * | 1975-05-31 | 1984-09-26 | Ａｂ．ボツフオ−ス | A device that measures the deviation of an object from the line of sight |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5170348U (en) * | 1974-11-29 | 1976-06-03 | ||
| JPS5311711Y2 (en) * | 1974-12-03 | 1978-03-30 | ||
| JPS5939710U (en) * | 1982-09-06 | 1984-03-14 | マツダ株式会社 | Engine blow-by gas recirculation device |
| JPS5960324U (en) * | 1982-10-14 | 1984-04-20 | 株式会社クボタ | Crank chamber blazer device for vertical overhead valve engine |
-
1984
- 1984-05-01 JP JP6298884U patent/JPS60175812U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939710B2 (en) * | 1975-05-31 | 1984-09-26 | Ａｂ．ボツフオ−ス | A device that measures the deviation of an object from the line of sight |
| JPS5510600U (en) * | 1979-06-22 | 1980-01-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60175812U (en) | 1985-11-21 |
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