JPS59188019A - Brether device for v-type engine - Google Patents
Brether device for v-type engineInfo
- Publication number
- JPS59188019A JPS59188019A JP4192683A JP4192683A JPS59188019A JP S59188019 A JPS59188019 A JP S59188019A JP 4192683 A JP4192683 A JP 4192683A JP 4192683 A JP4192683 A JP 4192683A JP S59188019 A JPS59188019 A JP S59188019A
- Authority
- JP
- Japan
- Prior art keywords
- buffer chamber
- pressure buffer
- right banks
- oil
- baffle plate
- 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.)
- Granted
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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
-
- 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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
- F01M13/023—Control valves in suction conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1824—Number of cylinders six
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/20—SOHC [Single overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ＯＨＣ式のＶ型エンジンにおいてクランクケ
ース内の圧力変動（ブリーズ）を静穏化するためのブリ
ーザ装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a breather device for calming pressure fluctuations (breeze) in a crankcase of an OHC type V-type engine.
一般に、レシプロエンジンにおいては、燃焼室からピス
トンリングとシリンダ壁との間隙を通ってクランクケー
ス内に漏れ出るいわゆるブローバイガスの爆発膨張行程
での漏れ量の増加やピストンのポンプ作用によってクラ
ンクケース内の圧力がエンジンの・回転に応じて変動す
る。そのため、上記クランクケース内のブローバイガス
を燃焼室内で吸気と共に燃焼処理すべくクランクケース
内を直接吸気通路へ連通した場合には、上記クランクケ
ース内の圧力変動に追従してブローバイガス中のオイル
が大量に吸気通路内に持ち込まれ、オイル消費量が増加
するという問題が生じる。そこで、クランクケース内と
連通するブリーザ室（圧力緩衝室）を設けることにより
、クランクケース内の圧力変動を緩和するようにしたブ
リーザ装置が採用されている。Generally, in a reciprocating engine, the amount of so-called blow-by gas that leaks from the combustion chamber into the crankcase through the gap between the piston ring and the cylinder wall increases during the explosion and expansion stroke, and the pumping action of the piston causes the gas to leak into the crankcase. Pressure fluctuates depending on engine rotation. Therefore, when the inside of the crankcase is communicated directly to the intake passage in order to combust the blow-by gas in the crank case together with the intake air in the combustion chamber, the oil in the blow-by gas follows the pressure fluctuations in the crank case. A large amount of oil is brought into the intake passage, resulting in an increase in oil consumption. Therefore, a breather device has been adopted in which pressure fluctuations within the crankcase are alleviated by providing a breather chamber (pressure buffer chamber) communicating with the inside of the crankcase.
ところで、Ｖ型エンジンにおけるこの種のブリーザ装置
としては、従来、例えば特公昭５２−３９９８３号公報
等に開示されているように、エンジンのクランクケース
の左右バンクの各外側部にブリーザ室としての空洞を鋳
込み形成した構造のものが提案されている。By the way, as disclosed in Japanese Patent Publication No. 52-39983, etc., this type of breather device for a V-type engine has conventionally provided a cavity as a breather chamber in each outer side of the left and right banks of the engine crankcase. A structure formed by casting has been proposed.
しかし、この提案のものでは、ブリーザ室をクランクケ
ースの左右バンクの各外側部に形成しているため、ブロ
ーバイガスに対するオイル分離機能を向上させるために
各ブリーザ室の容積を増大させたときにはその部分が外
方に膨出してエンジン寸法が増大し、その結果、該エン
ジンの側部への各種補器類の装備が制約される嫌いがあ
った。However, in this proposal, the breather chambers are formed on the outer sides of the left and right banks of the crankcase, so when the volume of each breather chamber is increased to improve the oil separation function against blow-by gas, This bulges outward, increasing the size of the engine, and as a result, the installation of various auxiliary equipment on the side of the engine is likely to be restricted.
特に、高速回転してブローバイガスの漏れ量も多くなる
ＯＨＣ式のＶ型エンジンでは顕著となる。This is particularly noticeable in OHC type V-type engines, which rotate at high speeds and leak a large amount of blow-by gas.
本発明はかかる点に鑑み、上記したＯＨＣ式の■型エン
ジンにおけるデッドスペースを有効に利用して圧力緩衝
室を設け、かつ該圧力緩衝室と吸気通路を連通ずること
により、Ｖ型エンジンの寸法を増大させることなく、圧
力緩衝室の容積を大に確保してクランクケース内の圧力
変動を効率良く緩和しブローバイガスに対するオイル分
離機能を向上し吸気通路へ吸引されるオイル量を少なく
し得るようにすることを目的とするものである。In view of these points, the present invention effectively utilizes the dead space in the OHC-type engine described above to provide a pressure buffer chamber, and communicates the pressure buffer chamber with the intake passage, thereby improving the dimensions of the V-type engine. It is possible to secure a large volume of the pressure buffer chamber without increasing the pressure, efficiently alleviate pressure fluctuations in the crankcase, improve the oil separation function against blow-by gas, and reduce the amount of oil sucked into the intake passage. The purpose is to
この目的の達成のために、本発明の構成は、ＯＨＣ式の
Ｖ型エンジンにおけるシリンダブロックの左右バンク間
部分に、側壁が左右バンクのシリンダブロック壁で構成
されているとともに上部が蓋部材で閉塞されてなり、ク
ランクケース内と連通ずるとともにスロットルバルブ下
流の吸気通路と連通路を介して連通する圧力緩衝室を形
成し、該圧力緩衝室に上記連通路の開口部に対向するバ
ッフル板を設けたものである。このことにより、ＯＨＣ
式のＶ型エンジンをコンパクトに保ちつつ該エンジンに
特有のデッドスペースを圧力緩衝室として有効に利用し
、該圧力緩衝室の圧力変動を小さくすることによってオ
イル分＊ｍ能を高めるとともに、該緩衝室をバッフル板
を近設した開口部を介して吸気通路と連通ずることによ
って、開口部へ飛散するオイルをバッフル板で遮きるこ
とによって、吸気通路へ吸引されるオイル量を低減する
ようにしたものである。To achieve this object, the present invention has a structure in which the side wall is composed of the cylinder block walls of the left and right banks in the portion between the left and right banks of the cylinder block in an OHC type V-type engine, and the upper part is closed with a lid member. A pressure buffer chamber is formed which communicates with the inside of the crankcase and communicates with the intake passage downstream of the throttle valve via a communication passage, and the pressure buffer chamber is provided with a baffle plate facing the opening of the communication passage. It is something that By this, OHC
While keeping the V-type engine compact, the dead space unique to the engine is effectively used as a pressure buffer chamber, and by reducing pressure fluctuations in the pressure buffer chamber, the oil content*m capacity is increased and the buffer By communicating the chamber with the intake passage through an opening with a baffle plate nearby, the baffle plate blocks oil from scattering toward the opening, reducing the amount of oil sucked into the intake passage. It is something.
以下、本発明を図面に示す実施例に基づいて詳細に説明
する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図ないし第３図において、１はＶ字状に配設された
左右のバンク２，３を持つＶ型エンジン、４は該エンジ
ン１のシリンダブロック、５は上記左右バンク２．３の
シリンダブロック４内にそれぞれ各バンク２，３につき
３つずつ形成された計６つのシリンダ、６は該各シリン
ダ５内を往復動するピストン、７は上記シリンダブロッ
ク４の下面に取り付けられたオイルパン、８は該オでル
パン７とシリンダブロック４下部とで構成されたクラン
クケース、９は該クランクケース８内に配設され、上記
各ピストン６にコネクチングロッド１０を介して連結さ
れたクランクシャフトである。1 to 3, 1 is a V-type engine having left and right banks 2 and 3 arranged in a V-shape, 4 is a cylinder block of the engine 1, and 5 is a cylinder of the left and right banks 2.3. A total of six cylinders, three for each bank 2 and 3, are formed in the block 4, a piston 6 reciprocating within each cylinder 5, an oil pan 7 attached to the lower surface of the cylinder block 4, Reference numeral 8 denotes a crankcase composed of the lupine 7 and the lower part of the cylinder block 4, and 9 a crankshaft disposed within the crankcase 8 and connected to each of the pistons 6 via connecting rods 10. .
また、１１は上記左右バンク２，３のシリンダブロック
４上面にそれぞれ気密接合されたシリンダヘッドで、各
シリンダヘッド１１と上記各シリンダ５と各ピストン６
とで囲まれた部分に燃焼室１２が形成されている。１３
は該燃焼室１２内に吸気を供給する吸気通路１４を形成
する吸気管であって、該吸気管１３は、上流端がエアク
リーナ１５に接続され、途中にスロットルバルブ１６を
有する気化器１７が介設された集合管部１３ａと、該集
合管部１３ａの下流端からサージタンク１８を介して分
岐された分岐管部１３ｂ、、１３ｂ、・・・とからなり
、各分岐管部１３ｂは吸気通路１４の下流端としての吸
気ポート１４ａを介して各シリンダ５の燃焼室１２に連
通している。また、１９は上記各燃焼室１２内の排気を
外部に排出する排気通路２０を形成する排気管である。Reference numeral 11 designates cylinder heads that are hermetically sealed to the upper surfaces of the cylinder blocks 4 of the left and right banks 2 and 3, each cylinder head 11, each cylinder 5, and each piston 6.
A combustion chamber 12 is formed in the area surrounded by. 13
1 is an intake pipe forming an intake passage 14 that supplies intake air into the combustion chamber 12. The intake pipe 13 is connected at its upstream end to an air cleaner 15, and has a carburetor 17 having a throttle valve 16 interposed therebetween. It consists of a collecting pipe section 13a provided therein, and branch pipe parts 13b, 13b, ... branched from the downstream end of the collecting pipe part 13a via a surge tank 18, and each branch pipe part 13b is an intake passage. It communicates with the combustion chamber 12 of each cylinder 5 via an intake port 14a as the downstream end of the cylinder 14. Further, 19 is an exhaust pipe forming an exhaust passage 20 for discharging the exhaust gas in each combustion chamber 12 to the outside.
２１は上記吸気ボート１４ａの燃焼室１２への開口部を
開閉する吸気バルブ、２２は上記排気通路２０の上流端
としての排気ポート２０ａの燃焼室１２への開口部を開
閉する排気バルブであって、該吸排気バルブ２１．２２
はシリンダヘッド１１に装備された、上記クランクシャ
フト９で回転駆動されるカムシャ７１〜２３によって開
閉駆動されるように設けられており、よってエンジン１
はＯＨＣ式のエンジンに構成されている。尚、２４は点
火プラグ、２５はシリンダブロック４内のオイルギヤラ
リである。21 is an intake valve that opens and closes the opening of the intake boat 14a to the combustion chamber 12; 22 is an exhaust valve that opens and closes the opening of the exhaust port 20a as the upstream end of the exhaust passage 20 to the combustion chamber 12; , the intake and exhaust valves 21.22
are provided to be opened and closed by camshafts 71 to 23, which are mounted on the cylinder head 11 and rotated by the crankshaft 9, so that the engine 1
is configured with an OHC type engine. Note that 24 is a spark plug, and 25 is an oil gear within the cylinder block 4.
さらに、上記シリンダブロック４の左右バンク２．３部
分の間には比較的小径の連通孔２６，２６、・・・を介
して上記クランクケース８内と連通ずる密閉状の圧力緩
衝室２７が形成されており、各燃焼室１２からクランク
ケース８内へ漏れ出るブローバイガスの爆発膨張行程で
の漏れ量の増加や各ピストン６のポンプ作用により該ク
ランクケース８内部の圧力が変動するのを該圧力緩衝室
２７によって緩和するようにしている。該圧力緩衝室２
７の左右の側壁は上記左右バンク２，３のシリンダブロ
ック４の対向する壁部４ａ 、４ａで構成され、前後の
側壁はシリンダブロック４のシリンダ列方向の端縁部に
左右のバンク２，３を連絡するように一体形成した壁部
４ｂ、４ｂで構成されている。また、圧力緩衝室２７の
上部はシール材２８を介して蓋部材２９で気密閉塞され
ており、該蓋部材２９は圧ツノ緩衝室２７内底面に突設
したリブ４ｃ 、 ４ｃ 、・・・にボルト３０．３０
．・・・止めされて固定されている。上記蓋部材２９の
一方の縁部には開口部３１が形成され、該開口部３１は
吸気負圧が設定値以下になったとき開く圧力コントロー
ルバルブ３２を介設した連通路３３を介して上記サージ
タンク１８内の吸気通路１４に連通されており、スロッ
トルバルブ１６下流の吸気通路１４内に生じる吸気負圧
により、クランクケース８内のブローバイガスを圧力緩
衝室２７内へ吸引したのち、連通路３３を介して吸気通
路１４内へ供給して吸気と共に各燃焼室１２にて燃焼処
理するように構成されている。Furthermore, a sealed pressure buffer chamber 27 is formed between the left and right banks 2.3 of the cylinder block 4 and communicates with the inside of the crankcase 8 through relatively small diameter communication holes 26, 26, . The pressure inside the crankcase 8 changes due to an increase in the amount of blow-by gas leaking from each combustion chamber 12 into the crankcase 8 during the explosion expansion stroke and the pumping action of each piston 6. The buffer chamber 27 is used to alleviate the stress. The pressure buffer chamber 2
The left and right side walls of the cylinder block 7 are formed by the opposing wall portions 4a and 4a of the cylinder blocks 4 of the left and right banks 2 and 3, and the front and rear side walls are formed by the left and right banks 2 and 3 at the end edges of the cylinder block 4 in the cylinder row direction. It is composed of wall portions 4b, 4b integrally formed so as to communicate with each other. Further, the upper part of the pressure buffer chamber 27 is hermetically closed with a lid member 29 via a sealing material 28, and the lid member 29 is provided with ribs 4c, 4c, . Bolt 30.30
．． ...It is stopped and fixed. An opening 31 is formed in one edge of the lid member 29, and the opening 31 is connected to the lid member 29 through a communication passage 33 with a pressure control valve 32 interposed therein, which opens when the intake negative pressure becomes less than a set value. It communicates with the intake passage 14 in the surge tank 18, and the blow-by gas in the crankcase 8 is sucked into the pressure buffer chamber 27 by the intake negative pressure generated in the intake passage 14 downstream of the throttle valve 16, and then the communication passage 33 into the intake passage 14 and is configured to be combusted together with the intake air in each combustion chamber 12.
また、上記スロットルバルブ１６上流の吸気通路１４と
各バンク２，３のシリンダヘッド１１内部とは連通路３
４を介して連通されている。また、該各シリンダヘッド
１１内部と上記クランクケース８内部とはシリンダブロ
ック４の各バンク２゜３部内に形成した連通路３５を介
して連通されており、連通路３３を介しての上記吸気負
圧によるガス吸引によりクランクケース８内部の圧力が
低下すると連通路３４からスロットルバルブ１６上流の
吸気通路１４内の吸気（空気）をクランクケース８内に
導入して、クランクケース８内を換気するように構成さ
れている。Furthermore, the intake passage 14 upstream of the throttle valve 16 and the inside of the cylinder head 11 of each bank 2, 3 are connected to a communication passage 3.
4. Further, the inside of each cylinder head 11 and the inside of the crankcase 8 are communicated via a communication passage 35 formed in the third part of each bank 2 of the cylinder block 4, and the intake negative When the pressure inside the crankcase 8 decreases due to gas suction due to pressure, the intake air (air) in the intake passage 14 upstream of the throttle valve 16 is introduced into the crankcase 8 from the communication passage 34 to ventilate the inside of the crankcase 8. It is composed of
さらに、第４図ないし第６図にも示すように、上記圧力
緩衝室２７内にはＭ筒室２７内のオイル飛沫が連通路３
３に直接吸引されるのを防止するためのバッフル板３６
が上記連通路３３の圧力緩衝室２７内への間口部３１に
対向し、該開口部３１を囲むように上記蓋部材２９の裏
面（下面）に所定の空間３７をあけて一体的に接合せし
めて設けられている。該バッフル板３６の上記開口部３
１と対応する位置にはオイル抜き孔３８が形成されてい
る。上記バッフル板３６は、連通路３３へオイル飛沫が
直接吸引されるのを防止するだけでなく、蓋部材２つと
でいわゆる、オイルセパレータ３９を構成づ゛るもので
あって、蓋部材２９との間の空間３７は、上記開口部３
１と反対側の端部にて圧力緩衝室２７に開放されている
とともに、その長手方向中間部の上記蓋部材２つ取付用
の内側の２つのボルト３０．３０と対応する部位にて絞
られていて、圧力緩衝室２７からスロットルバルブ１６
下流の吸気通路１４内に吸引される途中のブローバイガ
スを蓋部材２つとパンフル板３６との間の空間３７内へ
導入し、該空間３７内の途中で流速が変化しながら蛇行
して通過する間に周囲壁に衝突させることにより、その
内部に含まれるオイルを分離除去する一方、ブローバイ
ガスから分離されたオイルを空間３７の開放部およびオ
イル抜き孔３８から圧力緩衝室２７へ戻す。尚、４０は
各シリンダヘッド１１内で動弁系の潤滑用として使用さ
れたオイルの一部を圧力緩衝室２７内へ還流させるオイ
ルリターン通路である。Furthermore, as shown in FIGS. 4 to 6, the oil droplets in the M cylinder chamber 27 are contained in the pressure buffer chamber 27 through the communication path 3.
Baffle plate 36 for preventing direct suction to 3.
faces the opening 31 of the communication passage 33 into the pressure buffer chamber 27, and is integrally joined to the back surface (lower surface) of the lid member 29 with a predetermined space 37 so as to surround the opening 31. It is provided. The opening 3 of the baffle plate 36
An oil drain hole 38 is formed at a position corresponding to 1. The baffle plate 36 not only prevents oil droplets from being directly sucked into the communication path 33, but also constitutes a so-called oil separator 39 together with the two lid members. The space 37 between is the opening 3
It is open to the pressure buffer chamber 27 at the end opposite to 1, and is narrowed at a portion corresponding to the two inner bolts 30 and 30 for attaching the two lid members at the longitudinally intermediate portion thereof. from the pressure buffer chamber 27 to the throttle valve 16.
The blow-by gas that is being sucked into the downstream intake passage 14 is introduced into the space 37 between the two lid members and the panful plate 36, and passes through the space 37 in a meandering manner while the flow rate changes midway through the space 37. By colliding with the surrounding wall between them, the oil contained therein is separated and removed, while the oil separated from the blow-by gas is returned to the pressure buffer chamber 27 through the opening of the space 37 and the oil drain hole 38. Incidentally, reference numeral 40 denotes an oil return passage through which a portion of the oil used for lubricating the valve train within each cylinder head 11 is returned to the pressure buffer chamber 27.
したがって、上記実施例においては、エンジン１の各燃
焼室１２からクランクケース８内に漏れ出るブローバイ
ガス量の爆発膨張行程での増加や各ピストン６のポンプ
作用によって該クランクケース８内の圧力が変動しても
、該クランクケース８内と小径の連通孔２６，２６．・
・・を介して連通ずる圧力緩衝室２７での圧力変動は緩
和されて小さくなる。この圧力変動の小さい圧力緩衝室
２７に連続してオイルセパレータ３９が設けられている
ため、クランクケース８内から圧力緩衝室２７内に流入
したブローバイガス中のオイルが圧力変動に追従して吸
気通路１４に流入することは抑制され、よって簡単な構
造でもってオイルの分離機能を向上させることができる
。Therefore, in the above embodiment, the pressure inside the crankcase 8 fluctuates due to an increase in the amount of blow-by gas leaking into the crankcase 8 from each combustion chamber 12 of the engine 1 during the explosion and expansion stroke, and due to the pumping action of each piston 6. Even if the inside of the crankcase 8 and the small diameter communication holes 26, 26.・
The pressure fluctuations in the pressure buffer chamber 27 that communicates through the... are relaxed and reduced. Since the oil separator 39 is provided continuously to the pressure buffer chamber 27 where pressure fluctuations are small, the oil in the blow-by gas flowing into the pressure buffer chamber 27 from the crankcase 8 follows the pressure fluctuations and passes through the intake passage. 14 is suppressed, and therefore the oil separation function can be improved with a simple structure.
また、上記オイルセパレータ３９を内存する圧力緩衝室
２７がシリンダブロック４の左右バンク２．３間に形成
されているため、従来の如く左右バンク２．３の各外側
部°を膨出さけることなく大容積の圧力緩衝室２７をＶ
型エンジン１のデッドスペースを有効利用して容易に得
ることができ、よってエンジン１のコンパクト化を図る
ことができる。Furthermore, since the pressure buffer chamber 27 containing the oil separator 39 is formed between the left and right banks 2.3 of the cylinder block 4, the outer sides of the left and right banks 2.3 do not bulge out as in the conventional case. The large volume pressure buffer chamber 27 is
The dead space of the type engine 1 can be effectively utilized and easily obtained, so that the engine 1 can be made more compact.
尚、上記実施例では、蓋部材２９とバッフル板３６との
間の空間３７がその長手方向で蛇行しながら容積変化す
るようなものを使用したが、圧力緩衝室２７の容積が大
きいので、蓋部材２９の開口部３１を圧力緩衝室２７に
対して遮蔽するような単なる一枚板状のバッフル板を備
えたものを使用してもオイル分離機能を向上維持するこ
とができ、構造を簡単にできる利点がある。しかし、オ
イル分離機能のより一層の向上を図る点では上記実施例
の如きものが好ましい。In the above embodiment, the space 37 between the lid member 29 and the baffle plate 36 changes in volume while meandering in the longitudinal direction, but since the volume of the pressure buffer chamber 27 is large, the lid Even if a single baffle plate that shields the opening 31 of the member 29 from the pressure buffer chamber 27 is used, the oil separation function can be improved and maintained, and the structure can be simplified. There are advantages that can be achieved. However, in terms of further improving the oil separation function, the above embodiment is preferable.
また、本発明は６気筒以外のＯＨＯ式多気筒■型エンジ
ンにも適用できるのは言うまでもない。It goes without saying that the present invention can also be applied to OHO type multi-cylinder engines other than six cylinders.
以上説明したように、本発明によれば、ＯＨＣ式Ｖ型エ
ンジンのシリンダブロックの左右バンク間のスペースを
有効利用して、左右バンクのシリンダブロック壁を側壁
としクランクケース内と連通ずるとともにスロットルバ
ルブ下流の吸気通路と連通路を介して連通ずる圧力板１
１ｉ苗を形成し、該圧力緩衝室に上記連通路の開口部に
対向してバッフル板を設けたことにより、従来の如く左
右バンクの各外側部を膨出させずに大容積の圧力緩衝室
を容易に得ることができ、よってＶ型エンジンのコンパ
クト化を図りつつ吸気通路に吸引されるブローバイガス
中のオイルの分離機能を向上させることができる。As explained above, according to the present invention, the space between the left and right banks of the cylinder block of an OHC V-type engine is effectively utilized, and the cylinder block walls of the left and right banks are used as side walls to communicate with the inside of the crankcase, and the throttle valve A pressure plate 1 that communicates with the downstream intake passage through a communication passage.
By forming 1i seedlings and providing a baffle plate in the pressure buffer chamber facing the opening of the communication path, a large-volume pressure buffer chamber can be created without bulging out the outer parts of the left and right banks as in the conventional case. Therefore, it is possible to make the V-type engine more compact and to improve the oil separation function in the blow-by gas sucked into the intake passage.
図面は本発明の実施例を示し、第１図は、Ｖ型エンジン
のシリンダ列と直角な方向の縦断面図、第２図はシリン
ダブロックの平面図、第３図は圧力緩衝室のシリンダ列
方向の縦断面図、第４図は蓋部材の平面図、第５図およ
び第６図はそれぞれ第４図のｖ−ｖ線およびＶｌ −Ｖ
ｌ線断面図である。
１・・・Ｖ型エンジン、２，３・・・バンク、４・・・
シリンダブロック、５・・・シリンダ、６・・・ピスト
ン、８・・・クランクケース、１１・・・シリンダヘッ
ド、１２・・・燃焼室、１４・・・吸気通路、１６・・
・スロットルバルブ、２３・・・カムシャフト、２６・
・・連通孔、２７・・・圧力緩衝室、２９・・・蓋部材
、３１・・・開口部、３３・・・連通路、３６・・・バ
ッフル板、３９・・・オイルセパレータ。The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view taken in a direction perpendicular to the cylinder row of a V-type engine, FIG. 2 is a plan view of the cylinder block, and FIG. 3 is a cylinder row of the pressure buffer chamber. 4 is a plan view of the lid member, and FIGS. 5 and 6 are taken along lines v-v and Vl-V in FIG. 4, respectively.
It is a sectional view taken along the l line. 1...V-type engine, 2,3...bank, 4...
Cylinder block, 5...Cylinder, 6...Piston, 8...Crankcase, 11...Cylinder head, 12...Combustion chamber, 14...Intake passage, 16...
・Throttle valve, 23...Camshaft, 26・
... Communication hole, 27 ... Pressure buffer chamber, 29 ... Lid member, 31 ... Opening, 33 ... Communication path, 36 ... Baffle plate, 39 ... Oil separator.
Claims (1)
ャフトを備えた■型エンジン゛において、シリンダブロ
ックの左右バンクの間に、側壁が左右バンクのシリンダ
ブロック壁で構成されているとともに上部が蓋部材で閉
塞されてなり、クランクケース内と連通するとともにス
ロットルバルブ下流の吸気通路と連通路を介して連通ず
る圧力緩衝室を形成し、該圧力緩衝室に上記連通路の開
口部に対向するバッフル板を設けたことを特徴とする■
型エンジンのブリーザ装置。(1) In a type engine in which the cylinder heads of the left and right banks are each equipped with a camshaft, the side wall between the left and right banks of the cylinder block is composed of the cylinder block walls of the left and right banks, and the upper part is a lid member. The pressure buffer chamber is closed and communicates with the inside of the crankcase and communicates with the intake passage downstream of the throttle valve via the communication passage, and the pressure buffer chamber is provided with a baffle plate facing the opening of the communication passage. ■ Characterized by the establishment of ■
Type engine breather device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4192683A JPS59188019A (en) | 1983-03-14 | 1983-03-14 | Brether device for v-type engine |
| US06/584,892 US4541399A (en) | 1983-03-03 | 1984-02-29 | Breather arrangement for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4192683A JPS59188019A (en) | 1983-03-14 | 1983-03-14 | Brether device for v-type engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59188019A true JPS59188019A (en) | 1984-10-25 |
| JPS6326246B2 JPS6326246B2 (en) | 1988-05-28 |
Family
ID=12621841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4192683A Granted JPS59188019A (en) | 1983-03-03 | 1983-03-14 | Brether device for v-type engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59188019A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6197514U (en) * | 1984-12-04 | 1986-06-23 | ||
| JPS6232208A (en) * | 1985-08-01 | 1987-02-12 | Yamaha Motor Co Ltd | Oil tank for v-type internal combustion engine |
| JPH01262309A (en) * | 1988-04-13 | 1989-10-19 | Mazda Motor Corp | Blow-by gas deoxidation device for v type engine |
| US5131357A (en) * | 1990-03-31 | 1992-07-21 | Mazda Motor Corporation | Cylinder block for V-type engine |
| JP2009097489A (en) * | 2007-10-19 | 2009-05-07 | Nissan Motor Co Ltd | Engine blow-by gas collection device |
| JP2010236522A (en) * | 2009-03-31 | 2010-10-21 | Honda Motor Co Ltd | Hydraulic pressure warning system for internal combustion engine |
| US8061336B2 (en) | 2005-12-28 | 2011-11-22 | Toyota Jidosha Kabushiki Kaisha | PCV system for V-type engine |
| CN102678229A (en) * | 2012-06-05 | 2012-09-19 | 中国兵器工业集团第七0研究所 | Oil-gas circulation oil filtering system for engine body |
| CN104564232A (en) * | 2014-12-11 | 2015-04-29 | 中国北方发动机研究所(天津) | Crankcase ventilating system structure |
| CN112483661A (en) * | 2020-12-17 | 2021-03-12 | 东方电气集团东方电机有限公司 | Exhaust structure suitable for generator lubricating oil circulation pipeline system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2782775A (en) * | 1954-05-17 | 1957-02-26 | Gen Motors Corp | Engine interior ventilation system |
| JPS57183510A (en) * | 1981-05-08 | 1982-11-11 | Yamaha Motor Co Ltd | Breather of motorcycle engine |
-
1983
- 1983-03-14 JP JP4192683A patent/JPS59188019A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2782775A (en) * | 1954-05-17 | 1957-02-26 | Gen Motors Corp | Engine interior ventilation system |
| JPS57183510A (en) * | 1981-05-08 | 1982-11-11 | Yamaha Motor Co Ltd | Breather of motorcycle engine |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6197514U (en) * | 1984-12-04 | 1986-06-23 | ||
| JPS647209Y2 (en) * | 1984-12-04 | 1989-02-27 | ||
| JPS6232208A (en) * | 1985-08-01 | 1987-02-12 | Yamaha Motor Co Ltd | Oil tank for v-type internal combustion engine |
| JPH01262309A (en) * | 1988-04-13 | 1989-10-19 | Mazda Motor Corp | Blow-by gas deoxidation device for v type engine |
| US5131357A (en) * | 1990-03-31 | 1992-07-21 | Mazda Motor Corporation | Cylinder block for V-type engine |
| US8061336B2 (en) | 2005-12-28 | 2011-11-22 | Toyota Jidosha Kabushiki Kaisha | PCV system for V-type engine |
| JP2009097489A (en) * | 2007-10-19 | 2009-05-07 | Nissan Motor Co Ltd | Engine blow-by gas collection device |
| US8161951B2 (en) | 2007-10-19 | 2012-04-24 | Nissan Motor Co., Ltd. | Internal combustion engine |
| JP2010236522A (en) * | 2009-03-31 | 2010-10-21 | Honda Motor Co Ltd | Hydraulic pressure warning system for internal combustion engine |
| CN102678229A (en) * | 2012-06-05 | 2012-09-19 | 中国兵器工业集团第七0研究所 | Oil-gas circulation oil filtering system for engine body |
| CN104564232A (en) * | 2014-12-11 | 2015-04-29 | 中国北方发动机研究所(天津) | Crankcase ventilating system structure |
| CN112483661A (en) * | 2020-12-17 | 2021-03-12 | 东方电气集团东方电机有限公司 | Exhaust structure suitable for generator lubricating oil circulation pipeline system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6326246B2 (en) | 1988-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5069192A (en) | Internal combustion engine with crankcase ventilation system | |
| US4541399A (en) | Breather arrangement for internal combustion engine | |
| US6978744B2 (en) | Two-cycle combustion engine with air scavenging system | |
| US5058542A (en) | Rocker box cover assembly for internal combustion engine | |
| JPS6325162B2 (en) | ||
| JPH03483B2 (en) | ||
| US4603673A (en) | Breather device in internal combustion engine | |
| US7096834B2 (en) | Two-cycle combustion engine | |
| JPH0295712A (en) | Blow-by gas recovery device for engine | |
| JPS59188019A (en) | Brether device for v-type engine | |
| JPS61142313A (en) | Blow-bye gas processing device of internal-combustion engine | |
| JP6888430B2 (en) | Engine cooling oil passage structure | |
| JP2888383B2 (en) | Breather chamber arrangement structure of internal combustion engine | |
| JPS6335129Y2 (en) | ||
| KR890000252B1 (en) | Breather device in internal combustion engine | |
| JPS59160021A (en) | Breather apparatus of v-type engine | |
| JPS6337465Y2 (en) | ||
| JPS60184915A (en) | Breather for v-engine | |
| JP6897347B2 (en) | Engine cooling oil passage structure | |
| JPS6233065Y2 (en) | ||
| JPH0240850B2 (en) | ||
| JP2726717B2 (en) | Exhaust system for two-stroke internal combustion engine | |
| JP2504780Y2 (en) | V-type engine blow-by gas recirculation structure | |
| JPH0748967Y2 (en) | Crankcase ventilation system for internal combustion engine | |
| JPH02207129A (en) | Two-cycle engine |