WO2012157309A1 - Oil separator for internal combustion engine - Google Patents
Oil separator for internal combustion engine Download PDFInfo
- Publication number
- WO2012157309A1 WO2012157309A1 PCT/JP2012/054520 JP2012054520W WO2012157309A1 WO 2012157309 A1 WO2012157309 A1 WO 2012157309A1 JP 2012054520 W JP2012054520 W JP 2012054520W WO 2012157309 A1 WO2012157309 A1 WO 2012157309A1
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- WIPO (PCT)
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- oil
- drain pipe
- discharge port
- internal combustion
- combustion engine
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Classifications
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- 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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
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- 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
Definitions
- the present invention relates to an improvement in an oil separator which is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas taken out through the cylinder head cover.
- blow-by gas containing unburned components leaked from the combustion chamber into the crankcase is introduced into the engine intake system together with fresh air taken from outside and burned. ing. Since blow-by gas passing through the crankcase contains oil mist, in order to prevent oil from being taken away into the engine intake system, as disclosed in Patent Document 1, An oil separator is provided integrally, and the blow-by gas is taken out after separating and removing the oil through the oil separator.
- two blow-by gas passages are connected to the cylinder head cover, and fresh air is introduced from one passage under normal operating conditions. However, blow-by gas passes through both passages under high load conditions. Since it flows, an oil separator is provided for each of the cylinder head covers.
- the oil separated in the oil separator is collected in a drain pipe having an elongated cylindrical shape as described in Patent Document 1, and dropped into the valve operating chamber from the discharge port at the lower end.
- the separator part that separates oil in the oil separator as described above is composed of, for example, a fine passage or a baffle plate, and inevitably involves pressure loss.
- the internal pressure is relatively lower than the pressure in the valve operating chamber. For this reason, when the discharge port is open, blow-by gas containing oil mist flows in from the discharge port (reverse flow with respect to the oil discharge direction). By storing the oil inside, this oil functions as a kind of “lid” and prevents the backflow of blow-by gas through the discharge port.
- the present invention is an oil separator that is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas taken out through the cylinder head cover, and is downstream of the separator portion that separates the oil mist.
- an oil separator provided with a cylindrical drain pipe for collecting separated oil and having a discharge port for dropping oil into the valve operating chamber at the lower end of the drain pipe. Then, an oil guide wall is provided at the lower end of the drain pipe so as to surround the periphery of the discharge port away from the opening edge of the discharge port.
- the oil adhering to the outer wall surface of the drain pipe drops downward from the lower end of the oil guide wall and does not affect the oil present at the discharge port.
- the drain port at the lower end of the drain pipe opens to the side surface of the drain pipe that does not face the cam shaft with respect to the cam shaft closest to the drain pipe.
- the present invention it is possible to suppress the phenomenon that oil drops that flow downward along the outer wall surface of the drain pipe carry away the oil present at the discharge port at the lower end of the drain pipe, and maintain the function of the drain pipe as an oil reservoir. it can. Therefore, the backflow through the blow-by gas discharge port containing a large amount of oil mist can be prevented, and deterioration of the oil separation performance can be avoided.
- Sectional drawing of the cylinder head cover provided with the oil separator which concerns on this invention Sectional drawing which expands and shows the lower end part of a drain pipe. The top view which looked at the lower end of the drain pipe from the lower part.
- Sectional drawing which shows the modification of an oil guide wall.
- Sectional drawing which shows the Example which provided the discharge port in the side surface. Sectional drawing which shows the modification.
- FIG. 1 shows an embodiment in which the present invention is applied to a cylinder head cover 1 of an in-line multi-cylinder internal combustion engine.
- the cylinder head cover 1 is attached to the upper surface of the cylinder head 2 of the internal combustion engine together with a seal member 4 to define a valve operating chamber 3 that houses a so-called DOHC valve operating mechanism.
- the valve operating chamber 3 communicates with a crankcase on the cylinder block (not shown). After the blow-by gas flowing from the crankcase to the valve operating chamber 3 is removed from the oil, the blow-by gas collecting of the cylinder head cover 1 is performed. It is guided from the outlet 17 to the outside (engine intake system).
- the cylinder head cover 1 is integrally formed of an appropriate synthetic resin material, and an oil separator 5 is formed at an appropriate position in the engine longitudinal direction, for example, between the # 1 cylinder and the # 2 cylinder.
- a separator cover 15 that is separately molded with an appropriate synthetic resin material is attached to the inside of the top of the cylinder head cover 1 and extends in the left-right direction of the cylinder head cover 1, that is, in the direction orthogonal to the camshafts 6 and 7 (engine width direction).
- the oil separator 5 is formed in an elongated shape.
- the inside of the oil separator 5 constituted by the separator cover 15 and the cylinder head cover 1 includes an inlet chamber 21 located at one end portion in the left-right direction, an inlet-side separator chamber 22 located in the middle portion in the left-right direction, It is roughly divided into three parts: an outlet-side separator chamber 23 located at the other end in the left-right direction.
- the separator cover 15 has a rectangular opening 24 that serves as an inlet for blow-by gas. Through the opening 24, the inlet chamber 21 opens into the valve operating chamber 3. ing.
- the inlet chamber 21 and the inlet-side separator chamber 22 are substantially partitioned by a partition wall 25 protruding downward from the ceiling surface of the cylinder head cover 1, and the lower end of the partition wall 25 and the separator chamber bottom wall of the separator cover 15. Between the part 27, the inlet 26 is formed in the shape of a slit.
- the intake side camshaft 6 is positioned below the opening 24, but oil droplets scattered in the tangential direction as the camshaft 6 rotates are prevented from directly entering the inlet 26.
- the length of the partition wall 25 and the position of the opening 24 are set.
- the inlet-side separator chamber 22 and the outlet-side separator chamber 23 are partitioned by a partition wall 31 provided along the axial direction of the camshaft 16.
- a large number of fine passages 32 are formed through the partition wall 31 so as to allow the separator chambers 22 and 23 to communicate with each other.
- the partition wall portion 31 provided with the fine passage 32 functions as a kind of filter and separates the oil mist. Further, the partition wall portion 31 is opposed to the partition wall portion 31 at a slight interval on the outlet side of the fine passage 32. In addition, a collision plate 33 is arranged. Therefore, when the flow of blow-by gas constricted by the fine passage 32 collides with the surface of the collision plate 33, the oil mist is further separated.
- the separator portion that substantially separates the oil mist is configured as a combination of the partition wall portion 31 having the fine passage 32 and the collision plate 33, but in the present invention,
- the structure of a separator part is not restricted to this, The thing of various well-known types, such as a combination of a baffle plate and a labyrinth path, can be used.
- a drain pipe 35 for discharging the separated oil to the valve operating chamber 3 side is provided on the bottom surface of the inlet side separator chamber 22, that is, the separator chamber bottom wall portion 27.
- the drain pipe 35 has a flat cylindrical shape whose dimension in the engine longitudinal direction is larger than that in the engine width direction, extends downward toward the valve operating chamber 3, and includes a small discharge port 36 at the tip. Yes.
- the entire bottom surface forms a funnel shape so as to collect separated oil, and a drain pipe 37 for discharging the collected oil to the valve operating chamber 3 side is provided at the lower end thereof.
- the drain pipe 37 has a flat cylindrical shape whose dimension in the engine longitudinal direction is larger than that in the engine width direction, extends downward toward the valve operating chamber 3, and includes a small discharge port 38 at the tip. ing.
- the outlet side separator chamber 23 extends sideways above the exhaust side camshaft 7, and the blow-by gas outlet 17 on the upper surface of the cylinder head cover 1 communicates with the outlet side separator chamber 23.
- the discharge port 38 has an elongated slit shape or a long hole shape corresponding to the flat shape of the drain pipe 37, and projects downward from the bottom wall 37a of the drain pipe 37. It is surrounded by the shape part 38a.
- An oil guide wall 40 protruding downward from the bottom wall 37a is provided on the outer peripheral edge of the bottom wall 37a of the drain pipe 37 so as to surround the periphery of the discharge port 38 away from the opening edge of the discharge port 38. It has been.
- the oil guide wall 40 is resin-molded integrally with the drain pipe 37 as a part of the drain pipe 37.
- the oil guide wall 40 is arranged in the vertical direction of the drain pipe 37 so that the mold can be punched downward in FIG. It has a draft angle along. More specifically, in this embodiment, the oil guide wall 40 has a tapered cross-sectional shape with a sharp lower end, and the outer peripheral wall surface 40a is below the outer wall surface of the drain pipe 37. It has been extended to.
- the blow-by gas in the valve operating chamber 3 goes to the blow-by gas outlet 17, first, it enters the inlet chamber 21 through the opening 24, and from here the slit-shaped inlet 26 enters the inlet-side separator chamber 22.
- the blow-by gas passes through the fine passage 32 of the partition wall 31 to separate the oil mist, and the oil mist further separates by colliding with the collision plate 33 immediately after passing through the fine passage 32.
- the volume of the outlet side separator chamber 23 is large and the flow rate of blow-by gas is reduced, the oil mist is separated by its own weight here.
- the oil droplets separated and collected in the downward direction are dropped into the valve operating chamber 3 through the drain pipes 35 and 37, but are located at a certain height in the drain pipes 35 and 37 due to the surface tension at the discharge ports 36 and 38. Oil will be accumulated until. By such an oil reservoir function, the flow of blow-by gas through the discharge ports 36 and 38 is prevented.
- the oil that has adhered to the outer wall surface of the drain pipe 37 and has grown into large oil droplets flows downward along the outer wall surface of the drain pipe 37, but at the lower end of the drain pipe 37, Along the wall 40a of the oil guide wall 40, the oil guide wall 40 is dropped from the lower end of the oil guide wall 40 which is a sharp end. That is, the oil that flows down along the outer wall surface of the drain pipe 37 does not enter the discharge port 38 and does not affect the oil present in the discharge port 38.
- the drain pipe 35 of the inlet-side separator chamber 22 may be provided with a similar oil guiding wall, but the inlet-side separator chamber 22 is located upstream of the fine passage 32 that causes the main pressure loss. Since the pressure difference with the valve operating chamber 3 is small, the backflow of blow-by gas hardly occurs. Moreover, even if blow-by gas flows backward from the discharge port 36 into the inlet-side separator chamber 22, the blow-by gas passes through the fine passage 32 and the like to remove the oil. Backflow is not a problem.
- FIG. 4 shows a modification of the oil guide wall 40 according to the present invention.
- the outer peripheral edge portion of the bottom wall 37a of the drain pipe 37 is bent and formed so as to protrude downward, whereby an oil guide wall having a tapered cross-sectional shape with a sharp tip. 40 is formed. Therefore, the outer wall surface of the drain pipe 37 and the wall surface 40a of the oil guide wall 40 are continuous without a boundary.
- the central portion of the bottom wall 37a where the discharge port 38 is opened has a shape that is recessed upward relative to the outer peripheral edge portion of the bottom wall 37a.
- the oil guide wall 40 is configured to be continuous in a rectangular or oval shape so as to surround the entire circumference of the discharge port 38.
- the configuration is not necessarily continuous over the entire circumference.
- the configuration is such that the oil guide wall 40 is provided only on one side that receives oil droplets flying from the adjacent exhaust side camshaft 7. It is also possible.
- oil removal from the drain pipe 37 is suppressed by changing the position of the discharge port 38 instead of the formation of the oil guide wall 40 described above. It is. Specifically, as shown in FIG. 1, when it is assumed that the drain pipe 37 is adjacent to the exhaust camshaft 7 in the pair of camshafts 6 and 7, the exhaust camshaft 7 A discharge port 38 is formed as an opening on one side surface of the drain pipe 37 that is the side that does not face (in other words, the side opposite to the side facing the exhaust side camshaft 7). That is, at the lower end of the drain pipe 37, the discharge port 38 is opened toward the side.
- a recessed portion 41 that is locally recessed is further formed on the side surface of the drain pipe 37 that does not face the exhaust side camshaft 7 (that is, the side opposite to the side facing the exhaust side camshaft 7).
- the discharge port 38 that opens toward the side as described above is disposed.
- a bowl-shaped step 42 is formed above the discharge port 38 facing sideways and covers the upper portion of the discharge port 38. Therefore, even if the oil droplets flow down along the wall surface of the drain pipe 37 on the side where the discharge port 38 is located (the wall surface on the side that does not face the exhaust side camshaft 7), It drops at the edge and does not flow toward the discharge port 38. Thereby, the influence of the oil flowing on the outer wall surface of the drain pipe 37 is further reduced.
Abstract
An oil separator (5) is provided at the top inside a cylinder head cover (1). The oil separator (5) is divided into an inlet-side separator chamber (22) and an outlet-side separator chamber (23) by a partition wall (31) having a fine passage (32). The oil separated in the outlet-side separator chamber (23) collects in a drain pipe (37), and drips from a discharge port (38) into a movable valve chamber (3). To avoid a phenomenon whereby the oil that is present in the discharge port (38) is carried away when drops of oil adhering to the outside wall surface of the drain pipe (37) flow down, an oil-guiding wall (40) is provided so as to surround the discharge port (38) at the lower end of the drain pipe (37). The drops of oil on the outside wall surface drip down from the lower end of the oil-guiding wall (40), so the discharge port (38) is not affected. The oil accumulation function of the drain pipe (37) is maintained, and the reverse flow of blow-by gas is prevented.
Description
この発明は、内燃機関のシリンダヘッドカバーに一体に設けられ、該シリンダヘッドカバーを通して外部に取り出されるブローバイガスからオイルミストを分離するオイルセパレータの改良に関する。
The present invention relates to an improvement in an oil separator which is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas taken out through the cylinder head cover.
例えば自動車用内燃機関などにおいては、周知のように、燃焼室からクランクケース内に漏洩した未燃成分を含むブローバイガスを、外部から取り込んだ新気とともに機関吸気系に導いて燃焼させるようになっている。そして、クランクケース内を通るブローバイガスは、オイルミストを含んだものとなるので、機関吸気系へのオイルの持ち去りを防止するために、特許文献１に開示されているように、シリンダヘッドカバーに一体にオイルセパレータが設けられており、このオイルセパレータを介してオイルを分離除去した後に、ブローバイガスを取り出す構成となっている。なお、一般にシリンダヘッドカバーに２本のブローバイガス通路が接続され、通常の運転条件下では一方の通路から新気が導入されるようになっているが、高負荷条件では双方の通路をブローバイガスが流れるので、シリンダヘッドカバーには、それぞれに対しオイルセパレータが設けられる。
For example, in an internal combustion engine for automobiles, as is well known, blow-by gas containing unburned components leaked from the combustion chamber into the crankcase is introduced into the engine intake system together with fresh air taken from outside and burned. ing. Since blow-by gas passing through the crankcase contains oil mist, in order to prevent oil from being taken away into the engine intake system, as disclosed in Patent Document 1, An oil separator is provided integrally, and the blow-by gas is taken out after separating and removing the oil through the oil separator. In general, two blow-by gas passages are connected to the cylinder head cover, and fresh air is introduced from one passage under normal operating conditions. However, blow-by gas passes through both passages under high load conditions. Since it flows, an oil separator is provided for each of the cylinder head covers.
上記オイルセパレータにおいて分離されたオイルは、特許文献１に記載のように、細長い筒状をなすドレンパイプに集められ、その下端の排出口から動弁室内に滴下する。
The oil separated in the oil separator is collected in a drain pipe having an elongated cylindrical shape as described in Patent Document 1, and dropped into the valve operating chamber from the discharge port at the lower end.
ここで、上記のようなオイルセパレータにおいてオイルの分離を行うセパレータ部は、例えば微細な通路や邪魔板などから構成され、必然的に圧力損失を伴うので、セパレータ部の下流に位置するドレンパイプの内部の圧力は、動弁室内の圧力よりも相対的に低くなる。そのため、排出口が開放されていると、オイルミストを含んだブローバイガスが排出口から流入（オイルの排出方向に対して逆流）することとなるので、上記特許文献１では、上下に細長いドレンパイプ内にオイルを溜めておくことで、このオイルを一種の「蓋」として機能させ、排出口を通したブローバイガスの逆流を防止している。
Here, the separator part that separates oil in the oil separator as described above is composed of, for example, a fine passage or a baffle plate, and inevitably involves pressure loss. The internal pressure is relatively lower than the pressure in the valve operating chamber. For this reason, when the discharge port is open, blow-by gas containing oil mist flows in from the discharge port (reverse flow with respect to the oil discharge direction). By storing the oil inside, this oil functions as a kind of “lid” and prevents the backflow of blow-by gas through the discharge port.
上記のドレンパイプは、動弁室内に露出しているので、カムシャフトの回転などに伴って動弁室内に飛散するオイルが外側の壁面に付着し、やがて大きな油滴に集合してドレンパイプ下端から滴下する。このとき、ドレンパイプの外側壁面を伝わって下方へ流れる油滴が、ドレンパイプ下端の排出口へと回り込むことがあり、この油滴が排出口の開口縁から滴下する際に、ドレンパイプ内のオイルを同伴する、という現象が生じる。つまり、外側壁面から排出口へと回り込んだ油滴が排出口に存在するオイルと集合し、このオイルを持ち去る形で滴下する。
Since the above drain pipe is exposed in the valve chamber, the oil scattered in the valve chamber as the camshaft rotates, etc., adheres to the outer wall surface and eventually gathers into large oil droplets, and the lower end of the drain pipe Drip from. At this time, oil droplets that flow downward along the outer wall surface of the drain pipe may wrap around to the discharge port at the lower end of the drain pipe, and when this oil droplet drops from the opening edge of the drain port, The phenomenon of accompanying oil occurs. That is, the oil droplets that have circulated from the outer wall surface to the discharge port gather with the oil present at the discharge port, and drop the oil in a form that takes it away.
このような現象によってドレンパイプ内部からオイルが持ち出されてしまうと、上述したオイル溜めとしての機能が失われ、排出口を通してオイルミストを大量に含んだブローバイガスが逆流するため、オイルセパレータとしてのオイル分離性能が著しく低下する。
If oil is taken out from the drain pipe due to such a phenomenon, the function as the oil reservoir described above is lost, and blow-by gas containing a large amount of oil mist flows back through the discharge port. Separation performance is significantly reduced.
この発明は、ドレンパイプの外側壁面に付着したオイルが油滴に成長して動弁室内に滴下する際に、ドレンパイプ下端の排出口の開口縁から離れた箇所で滴下するようにしたものである。
In the present invention, when the oil adhering to the outer wall surface of the drain pipe grows into oil droplets and drops into the valve operating chamber, it drops at a location away from the opening edge of the discharge port at the lower end of the drain pipe. is there.
すなわち、本発明は、内燃機関のシリンダヘッドカバーに一体に設けられ、該シリンダヘッドカバーを通して外部に取り出されるブローバイガスからオイルミストを分離するオイルセパレータであって、オイルミストの分離を行うセパレータ部の下流側に、分離したオイルが集まる筒状のドレンパイプを備えるとともに、このドレンパイプの下端に、オイルを動弁室内に滴下させるための排出口が設けられてなるオイルセパレータを前提としており、一つの態様では、上記ドレンパイプの下端に、上記排出口の開口縁から離れて該排出口の周囲を囲むオイル誘導壁が設けられている。
That is, the present invention is an oil separator that is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas taken out through the cylinder head cover, and is downstream of the separator portion that separates the oil mist. And an oil separator provided with a cylindrical drain pipe for collecting separated oil and having a discharge port for dropping oil into the valve operating chamber at the lower end of the drain pipe. Then, an oil guide wall is provided at the lower end of the drain pipe so as to surround the periphery of the discharge port away from the opening edge of the discharge port.
従って、ドレンパイプの外側壁面に付着したオイルは、オイル誘導壁の下端から下方へ滴下し、排出口に存在するオイルに影響を与えない。
Therefore, the oil adhering to the outer wall surface of the drain pipe drops downward from the lower end of the oil guide wall and does not affect the oil present at the discharge port.
また、本発明の他の一つの態様では、ドレンパイプ下端の排出口が、上記ドレンパイプに最も近いカムシャフトに対して、該カムシャフトに対面しない側のドレンパイプ側面に開口している。
Further, in another aspect of the present invention, the drain port at the lower end of the drain pipe opens to the side surface of the drain pipe that does not face the cam shaft with respect to the cam shaft closest to the drain pipe.
ドレンパイプが動弁室内でカムシャフトに隣接している場合、カムシャフトの回転に伴って飛翔する油滴は、ドレンパイプのカムシャフト側の側面に主に付着し、ここから下方へ滴下する。従って、カムシャフトに対面しない側のドレンパイプ側面に排出口を開口させることで、ドレンパイプ側面に付着するオイルの滴下による影響が抑制される。
When the drain pipe is adjacent to the camshaft in the valve operating chamber, the oil droplets flying as the camshaft rotates mainly adheres to the side surface of the drain pipe on the camshaft side and drops downward from here. Therefore, by opening the discharge port on the side surface of the drain pipe that does not face the camshaft, the influence of dripping of oil adhering to the side surface of the drain pipe is suppressed.
本発明によれば、ドレンパイプの外側壁面を伝わって下方へ流れる油滴が、ドレンパイプ下端の排出口に存在するオイルを持ち去る、という現象を抑制でき、ドレンパイプのオイル溜めとしての機能を維持できる。従って、オイルミストを大量に含んだブローバイガスの排出口を通した逆流を防止でき、オイル分離性能の悪化が回避される。
According to the present invention, it is possible to suppress the phenomenon that oil drops that flow downward along the outer wall surface of the drain pipe carry away the oil present at the discharge port at the lower end of the drain pipe, and maintain the function of the drain pipe as an oil reservoir. it can. Therefore, the backflow through the blow-by gas discharge port containing a large amount of oil mist can be prevented, and deterioration of the oil separation performance can be avoided.
以下、この発明の一実施例を図面に基づいて詳細に説明する。
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
図１は、直列多気筒内燃機関のシリンダヘッドカバー１にこの発明を適用した一実施例を示している。このシリンダヘッドカバー１は、内燃機関のシリンダヘッド２の上面にシール部材４とともに取り付けられ、所謂ＤＯＨＣ型の動弁機構を収容した動弁室３を画成している。動弁室３は、図示せぬシリンダブロック側のクランクケースと連通しており、クランクケースから動弁室３へと流れてきたブローバイガスが、オイル除去された後に、シリンダヘッドカバー１のブローバイガス取出口１７から外部（機関吸気系）に案内されるようになっている。
FIG. 1 shows an embodiment in which the present invention is applied to a cylinder head cover 1 of an in-line multi-cylinder internal combustion engine. The cylinder head cover 1 is attached to the upper surface of the cylinder head 2 of the internal combustion engine together with a seal member 4 to define a valve operating chamber 3 that houses a so-called DOHC valve operating mechanism. The valve operating chamber 3 communicates with a crankcase on the cylinder block (not shown). After the blow-by gas flowing from the crankcase to the valve operating chamber 3 is removed from the oil, the blow-by gas collecting of the cylinder head cover 1 is performed. It is guided from the outlet 17 to the outside (engine intake system).
上記シリンダヘッドカバー１は、適宜な合成樹脂材料により一体に成形されたもので、機関長手方向の適宜位置、例えば♯１気筒と♯２気筒との間に、オイルセパレータ５が構成されている。詳しくは、適宜な合成樹脂材料により別に成形されたセパレータカバー１５がシリンダヘッドカバー１の頂部内側に取り付けられ、シリンダヘッドカバー１の左右方向つまりカムシャフト６，７と直交する方向（機関幅方向）に沿って細長く延びた形にオイルセパレータ５が構成されている。
The cylinder head cover 1 is integrally formed of an appropriate synthetic resin material, and an oil separator 5 is formed at an appropriate position in the engine longitudinal direction, for example, between the # 1 cylinder and the # 2 cylinder. Specifically, a separator cover 15 that is separately molded with an appropriate synthetic resin material is attached to the inside of the top of the cylinder head cover 1 and extends in the left-right direction of the cylinder head cover 1, that is, in the direction orthogonal to the camshafts 6 and 7 (engine width direction). Thus, the oil separator 5 is formed in an elongated shape.
このようにセパレータカバー１５とシリンダヘッドカバー１とにより構成されるオイルセパレータ５の内部は、左右方向の一端部に位置する入口室２１と、左右方向の中間部に位置する入口側セパレータ室２２と、左右方向の他端部に位置する出口側セパレータ室２３と、の３つの部分に大別される。上記入口室２１の部分では、上記セパレータカバー１５は、ブローバイガスの入口となる矩形の開口部２４を有しており、この開口部２４を通して、上記入口室２１は、動弁室３に開口している。
Thus, the inside of the oil separator 5 constituted by the separator cover 15 and the cylinder head cover 1 includes an inlet chamber 21 located at one end portion in the left-right direction, an inlet-side separator chamber 22 located in the middle portion in the left-right direction, It is roughly divided into three parts: an outlet-side separator chamber 23 located at the other end in the left-right direction. In the inlet chamber 21, the separator cover 15 has a rectangular opening 24 that serves as an inlet for blow-by gas. Through the opening 24, the inlet chamber 21 opens into the valve operating chamber 3. ing.
上記入口室２１と上記入口側セパレータ室２２とは、シリンダヘッドカバー１の天井面から下方へ突出した仕切壁２５によってほぼ仕切られており、この仕切壁２５の下端とセパレータカバー１５のセパレータ室底壁部２７との間に、スリット状に入口２６が形成されている。
The inlet chamber 21 and the inlet-side separator chamber 22 are substantially partitioned by a partition wall 25 protruding downward from the ceiling surface of the cylinder head cover 1, and the lower end of the partition wall 25 and the separator chamber bottom wall of the separator cover 15. Between the part 27, the inlet 26 is formed in the shape of a slit.
なお、上記開口部２４の下方には、吸気側カムシャフト６が位置しているが、このカムシャフト６の回転に伴い接線方向に飛散する油滴が直接上記入口２６に入り込むことがないように、上記仕切壁２５の長さならびに開口部２４の位置が設定されている。
The intake side camshaft 6 is positioned below the opening 24, but oil droplets scattered in the tangential direction as the camshaft 6 rotates are prevented from directly entering the inlet 26. The length of the partition wall 25 and the position of the opening 24 are set.
上記入口側セパレータ室２２と上記出口側セパレータ室２３との間は、カムシャフト１６の軸方向に沿って設けられた隔壁部３１によって仕切られている。上記隔壁部３１には、両セパレータ室２２，２３を連通するように多数の微細通路３２が貫通形成されている。
The inlet-side separator chamber 22 and the outlet-side separator chamber 23 are partitioned by a partition wall 31 provided along the axial direction of the camshaft 16. A large number of fine passages 32 are formed through the partition wall 31 so as to allow the separator chambers 22 and 23 to communicate with each other.
微細通路３２を備えた隔壁部３１は、一種のフィルタとして機能し、オイルミストの分離を行うが、さらに、上記微細通路３２の出口側に、僅かな間隔を置いて隔壁部３１と対向するように、衝突板３３が配置されている。従って、微細通路３２により絞られたブローバイガスの流れが、衝突板３３の表面に衝突することで、さらにオイルミストが分離される。このように本実施例では、微細通路３２を有する隔壁部３１と衝突板３３とを組み合わせたものとして、オイルミストの分離を実質的に行うセパレータ部が構成されているが、本発明においては、セパレータ部の構成はこれに限らず、邪魔板の組み合わせや迷路状の通路など公知の種々の形式のものを用いることができる。
The partition wall portion 31 provided with the fine passage 32 functions as a kind of filter and separates the oil mist. Further, the partition wall portion 31 is opposed to the partition wall portion 31 at a slight interval on the outlet side of the fine passage 32. In addition, a collision plate 33 is arranged. Therefore, when the flow of blow-by gas constricted by the fine passage 32 collides with the surface of the collision plate 33, the oil mist is further separated. As described above, in this embodiment, the separator portion that substantially separates the oil mist is configured as a combination of the partition wall portion 31 having the fine passage 32 and the collision plate 33, but in the present invention, The structure of a separator part is not restricted to this, The thing of various well-known types, such as a combination of a baffle plate and a labyrinth path, can be used.
上記入口側セパレータ室２２の底面つまりセパレータ室底壁部２７には、分離したオイルを動弁室３側へ排出するためのドレンパイプ３５が設けられている。このドレンパイプ３５は、機関長手方向の寸法が機関幅方向の寸法よりも大きな偏平な筒状をなし、動弁室３へ向かって下方へ延びているとともに、先端に小さな排出口３６を備えている。
A drain pipe 35 for discharging the separated oil to the valve operating chamber 3 side is provided on the bottom surface of the inlet side separator chamber 22, that is, the separator chamber bottom wall portion 27. The drain pipe 35 has a flat cylindrical shape whose dimension in the engine longitudinal direction is larger than that in the engine width direction, extends downward toward the valve operating chamber 3, and includes a small discharge port 36 at the tip. Yes.
また、出口側セパレータ室２３では、分離したオイルを集めるように底面全体が漏斗状をなし、かつその下端に、集まったオイルを動弁室３側へ排出するためのドレンパイプ３７が設けられている。このドレンパイプ３７は、やはり機関長手方向の寸法が機関幅方向の寸法よりも大きな偏平な筒状をなし、動弁室３へ向かって下方へ延びているとともに、先端に小さな排出口３８を備えている。上記出口側セパレータ室２３は、排気側カムシャフト７の上方へと側方へ延びており、シリンダヘッドカバー１上面のブローバイガス取出口１７が、該出口側セパレータ室２３に連通している。
Further, in the outlet side separator chamber 23, the entire bottom surface forms a funnel shape so as to collect separated oil, and a drain pipe 37 for discharging the collected oil to the valve operating chamber 3 side is provided at the lower end thereof. Yes. The drain pipe 37 has a flat cylindrical shape whose dimension in the engine longitudinal direction is larger than that in the engine width direction, extends downward toward the valve operating chamber 3, and includes a small discharge port 38 at the tip. ing. The outlet side separator chamber 23 extends sideways above the exhaust side camshaft 7, and the blow-by gas outlet 17 on the upper surface of the cylinder head cover 1 communicates with the outlet side separator chamber 23.
上記排出口３８は、図２，図３に示すように、ドレンパイプ３７の偏平形状に対応して細長いスリット状ないし長孔状をなし、かつドレンパイプ３７の底壁３７ａから下方へ突出した筒状部３８ａによって囲まれている。そして、ドレンパイプ３７の底壁３７ａの外周縁には、上記排出口３８の開口縁から離れて該排出口３８の周囲を囲むように、底壁３７ａから下方へ突出したオイル誘導壁４０が設けられている。このオイル誘導壁４０は、ドレンパイプ３７の一部として該ドレンパイプ３７と一体に樹脂成形されており、金型を図１の下方の方向へ型抜きできるように、ドレンパイプ３７の上下方向に沿った抜き勾配を有している。より詳しくは、この実施例では、オイル誘導壁４０は、下端が鋭端となったテーパ状の断面形状を有しており、その外周側の壁面４０ａは、ドレンパイプ３７の外側の壁面を下方へ延長したものとなっている。
2 and 3, the discharge port 38 has an elongated slit shape or a long hole shape corresponding to the flat shape of the drain pipe 37, and projects downward from the bottom wall 37a of the drain pipe 37. It is surrounded by the shape part 38a. An oil guide wall 40 protruding downward from the bottom wall 37a is provided on the outer peripheral edge of the bottom wall 37a of the drain pipe 37 so as to surround the periphery of the discharge port 38 away from the opening edge of the discharge port 38. It has been. The oil guide wall 40 is resin-molded integrally with the drain pipe 37 as a part of the drain pipe 37. The oil guide wall 40 is arranged in the vertical direction of the drain pipe 37 so that the mold can be punched downward in FIG. It has a draft angle along. More specifically, in this embodiment, the oil guide wall 40 has a tapered cross-sectional shape with a sharp lower end, and the outer peripheral wall surface 40a is below the outer wall surface of the drain pipe 37. It has been extended to.
上記のように構成されたオイルセパレータ５においては、動弁室３内のブローバイガスがブローバイガス取出口１７へと向かう際に、まず開口部２４を通して入口室２１に入り、ここからスリット状の入口２６を経て入口側セパレータ室２２に入る。そして、ブローバイガスが隔壁部３１の微細通路３２を通過することで、オイルミストが分離され、かつ微細通路３２通過直後に衝突板３３に衝突することで、さらにオイルミストが分離される。また、出口側セパレータ室２３の容積は大きく、ブローバイガスの流速が低下するため、ここでも自重によりオイルミストが分離される。そして、分離されて下方に集まった油滴は、ドレンパイプ３５，３７を通して動弁室３に滴下するが、排出口３６，３８における表面張力によって、ドレンパイプ３５，３７内にある程度の高さ位置までオイルが溜まった状態となる。このようなオイル溜め機能によって、排出口３６，３８を通したブローバイガスの流れが阻止される。
In the oil separator 5 configured as described above, when the blow-by gas in the valve operating chamber 3 goes to the blow-by gas outlet 17, first, it enters the inlet chamber 21 through the opening 24, and from here the slit-shaped inlet 26 enters the inlet-side separator chamber 22. The blow-by gas passes through the fine passage 32 of the partition wall 31 to separate the oil mist, and the oil mist further separates by colliding with the collision plate 33 immediately after passing through the fine passage 32. Moreover, since the volume of the outlet side separator chamber 23 is large and the flow rate of blow-by gas is reduced, the oil mist is separated by its own weight here. The oil droplets separated and collected in the downward direction are dropped into the valve operating chamber 3 through the drain pipes 35 and 37, but are located at a certain height in the drain pipes 35 and 37 due to the surface tension at the discharge ports 36 and 38. Oil will be accumulated until. By such an oil reservoir function, the flow of blow-by gas through the discharge ports 36 and 38 is prevented.
ここで、上記構成においては、ドレンパイプ３７の外側壁面に付着して大きな油滴に成長したオイルは、ドレンパイプ３７の外側壁面を伝わって下方へ流れていくが、ドレンパイプ３７の下端では、オイル誘導壁４０の壁面４０ａを伝わり、鋭端となったオイル誘導壁４０の下端から滴下する。つまり、ドレンパイプ３７の外側壁面を伝わって流れ落ちるオイルは排出口３８に回り込むことがなく、排出口３８に存在するオイルに影響することがない。従って、ドレンパイプ３７内でのオイル溜めとしての機能が維持され、ドレンパイプ３７の排出口３８を通したブローバイガスの逆流（動弁室３から出口側セパレータ室２３への流入）ひいてはブローバイガス取出口１７への流出が阻止される。
Here, in the above configuration, the oil that has adhered to the outer wall surface of the drain pipe 37 and has grown into large oil droplets flows downward along the outer wall surface of the drain pipe 37, but at the lower end of the drain pipe 37, Along the wall 40a of the oil guide wall 40, the oil guide wall 40 is dropped from the lower end of the oil guide wall 40 which is a sharp end. That is, the oil that flows down along the outer wall surface of the drain pipe 37 does not enter the discharge port 38 and does not affect the oil present in the discharge port 38. Therefore, the function as an oil reservoir in the drain pipe 37 is maintained, and the reverse flow of blow-by gas through the discharge port 38 of the drain pipe 37 (inflow from the valve operating chamber 3 to the outlet-side separator chamber 23) and further blow-by gas collection Outflow to the outlet 17 is prevented.
なお、入口側セパレータ室２２のドレンパイプ３５について、同様のオイル誘導壁を設けるようにしてもよいが、この入口側セパレータ室２２は、主たる圧力損失の要因となる微細通路３２の上流側にあり、動弁室３内との圧力差が小さいため、ブローバイガスの逆流は生じにくい。しかも、仮にブローバイガスが排出口３６から入口側セパレータ室２２内に逆流しても、このブローバイガスは微細通路３２等を通過してオイル除去がなされるので、ドレンパイプ３５については、ブローバイガスの逆流はそれほど問題とならない。
The drain pipe 35 of the inlet-side separator chamber 22 may be provided with a similar oil guiding wall, but the inlet-side separator chamber 22 is located upstream of the fine passage 32 that causes the main pressure loss. Since the pressure difference with the valve operating chamber 3 is small, the backflow of blow-by gas hardly occurs. Moreover, even if blow-by gas flows backward from the discharge port 36 into the inlet-side separator chamber 22, the blow-by gas passes through the fine passage 32 and the like to remove the oil. Backflow is not a problem.
次に、図４は、この発明に係るオイル誘導壁４０の変形例を示している。この実施例では、ドレンパイプ３７の底壁３７ａの外周縁部分が下方へ突出するように折り曲げて成形されており、これによって、先端が鋭端となったテーパ状の断面形状を有するオイル誘導壁４０が形成されている。従って、ドレンパイプ３７の外側壁面とオイル誘導壁４０の壁面４０ａとは、境界なく連続している。換言すれば、排出口３８が開口する底壁３７ａの中央部分が、底壁３７ａの外周縁部分に比べて相対的に上方へ窪んだ形となっている。
Next, FIG. 4 shows a modification of the oil guide wall 40 according to the present invention. In this embodiment, the outer peripheral edge portion of the bottom wall 37a of the drain pipe 37 is bent and formed so as to protrude downward, whereby an oil guide wall having a tapered cross-sectional shape with a sharp tip. 40 is formed. Therefore, the outer wall surface of the drain pipe 37 and the wall surface 40a of the oil guide wall 40 are continuous without a boundary. In other words, the central portion of the bottom wall 37a where the discharge port 38 is opened has a shape that is recessed upward relative to the outer peripheral edge portion of the bottom wall 37a.
なお、図２，３の実施例および図４の実施例のいずれも、オイル誘導壁４０は、排出口３８の全周を囲むように矩形ないし長円形に連続した構成となっているが、本発明においては、必ずしも全周に亘って連続した構成でなくてもよく、例えば、隣接した排気側カムシャフト７から飛翔した油滴を受ける一方の側にのみオイル誘導壁４０を設けた構成とすることも可能である。
2 and 3 and the embodiment of FIG. 4, the oil guide wall 40 is configured to be continuous in a rectangular or oval shape so as to surround the entire circumference of the discharge port 38. In the invention, the configuration is not necessarily continuous over the entire circumference. For example, the configuration is such that the oil guide wall 40 is provided only on one side that receives oil droplets flying from the adjacent exhaust side camshaft 7. It is also possible.
次に、図５に示す実施例は、上記のオイル誘導壁４０の形成に代えて排出口３８の位置を変更することによって、ドレンパイプ３７内からのオイルの持ち去りを抑制するようにしたものである。具体的には、図１に示したように、ドレンパイプ３７が一対のカムシャフト６，７の中で排気側カムシャフト７に隣接している構成を前提とした場合に、排気側カムシャフト７と対面しない側（換言すれば、排気側カムシャフト７と対面する側の反対側）となるドレンパイプ３７の一方の側面に、排出口３８が開口形成されている。つまり、ドレンパイプ３７の下端において、側方へ向かって排出口３８が開口している。
Next, in the embodiment shown in FIG. 5, oil removal from the drain pipe 37 is suppressed by changing the position of the discharge port 38 instead of the formation of the oil guide wall 40 described above. It is. Specifically, as shown in FIG. 1, when it is assumed that the drain pipe 37 is adjacent to the exhaust camshaft 7 in the pair of camshafts 6 and 7, the exhaust camshaft 7 A discharge port 38 is formed as an opening on one side surface of the drain pipe 37 that is the side that does not face (in other words, the side opposite to the side facing the exhaust side camshaft 7). That is, at the lower end of the drain pipe 37, the discharge port 38 is opened toward the side.
ドレンパイプ３７の外側壁面に付着する油滴の多くは、隣接するカムシャフトつまりこの場合は排気側カムシャフト７の回転に伴って接線方向に飛翔するオイルからなる。従って、この飛翔するオイルを受けない側に排出口３８を配置することで、ドレンパイプ３７の外側壁面を伝わって流れ落ちるオイルの影響が大幅に減少し、ドレンパイプ３７のオイル溜めとしての機能を維持し得る。
Most of the oil droplets adhering to the outer wall surface of the drain pipe 37 are composed of oil that flies in the tangential direction as the adjacent camshaft, that is, in this case, the exhaust side camshaft 7 rotates. Therefore, by arranging the discharge port 38 on the side not receiving the flying oil, the influence of the oil flowing down along the outer wall surface of the drain pipe 37 is greatly reduced, and the function of the drain pipe 37 as an oil reservoir is maintained. Can do.
図６に示す実施例は、さらに、排気側カムシャフト７に対面しない側（つまり、排気側カムシャフト７と対面する側の反対側）のドレンパイプ３７側面に、局部的に窪んだ凹部４１が設けられており、この凹部４１の中に、上記のように側方へ向かって開口する排出口３８が配置されている。換言すれば、側方を向いた排出口３８の上方に庇状の段部４２が形成され、排出口３８上方を覆っている。従って、この排出口３８が位置する側のドレンパイプ３７の壁面（排気側カムシャフト７に対面しない側の壁面）を伝わって油滴が流れ落ちてきたとしても、この油滴は、段部４２の端縁において滴下し、排出口３８の方には流れ込まない。これにより、ドレンパイプ３７の外側壁面を流れるオイルの影響がさらに低減する。
In the embodiment shown in FIG. 6, a recessed portion 41 that is locally recessed is further formed on the side surface of the drain pipe 37 that does not face the exhaust side camshaft 7 (that is, the side opposite to the side facing the exhaust side camshaft 7). In the recess 41, the discharge port 38 that opens toward the side as described above is disposed. In other words, a bowl-shaped step 42 is formed above the discharge port 38 facing sideways and covers the upper portion of the discharge port 38. Therefore, even if the oil droplets flow down along the wall surface of the drain pipe 37 on the side where the discharge port 38 is located (the wall surface on the side that does not face the exhaust side camshaft 7), It drops at the edge and does not flow toward the discharge port 38. Thereby, the influence of the oil flowing on the outer wall surface of the drain pipe 37 is further reduced.
Claims (6)
- 内燃機関のシリンダヘッドカバーに一体に設けられ、該シリンダヘッドカバーを通して外部に取り出されるブローバイガスからオイルミストを分離するオイルセパレータであって、オイルミストの分離を行うセパレータ部の下流側に、分離したオイルが集まる筒状のドレンパイプを備えるとともに、このドレンパイプの下端に、オイルを動弁室内に滴下させるための排出口が設けられてなるオイルセパレータにおいて、
上記ドレンパイプの下端に、上記排出口の開口縁から離れて該排出口の周囲を囲むオイル誘導壁が設けられている内燃機関のオイルセパレータ。 An oil separator that is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas that is taken out through the cylinder head cover. In the oil separator provided with a cylindrical drain pipe that collects, and at the lower end of the drain pipe, a discharge port for dropping oil into the valve operating chamber is provided.
An oil separator for an internal combustion engine, wherein an oil guide wall is provided at a lower end of the drain pipe so as to be separated from an opening edge of the discharge port and surround the periphery of the discharge port. - 上記オイル誘導壁は、上記ドレンパイプの側面を下方へ延長してなる壁面を有する請求項１に記載の内燃機関のオイルセパレータ。 The oil separator for an internal combustion engine according to claim 1, wherein the oil guide wall has a wall surface formed by extending a side surface of the drain pipe downward.
- 上記オイル誘導壁は、ドレンパイプの一部として該ドレンパイプと一体に樹脂成形されており、ドレンパイプの上下方向に沿った抜き勾配を有する請求項１に記載の内燃機関のオイルセパレータ。 2. The oil separator for an internal combustion engine according to claim 1, wherein the oil guide wall is resin-molded integrally with the drain pipe as a part of the drain pipe, and has a draft along the vertical direction of the drain pipe.
- 上記オイル誘導壁は、下端が鋭端となったテーパ状の断面形状を有する請求項１に記載の内燃機関のオイルセパレータ。 The oil separator for an internal combustion engine according to claim 1, wherein the oil guide wall has a tapered cross-sectional shape with a sharp lower end.
- 内燃機関のシリンダヘッドカバーに一体に設けられ、該シリンダヘッドカバーを通して外部に取り出されるブローバイガスからオイルミストを分離するオイルセパレータであって、オイルミストの分離を行うセパレータ部の下流側に、分離したオイルが集まる筒状のドレンパイプを備えるとともに、このドレンパイプの下端に、オイルを動弁室内に滴下させるための排出口が設けられてなるオイルセパレータにおいて、
上記排出口が、上記ドレンパイプに最も近いカムシャフトに対して、該カムシャフトに対面する側とは反対側のドレンパイプ側面に開口している内燃機関のオイルセパレータ。 An oil separator that is provided integrally with a cylinder head cover of an internal combustion engine and separates oil mist from blow-by gas that is taken out through the cylinder head cover. In the oil separator provided with a cylindrical drain pipe that collects, and at the lower end of the drain pipe, a discharge port for dropping oil into the valve operating chamber is provided.
An oil separator for an internal combustion engine, wherein the discharge port is open on a side surface of the drain pipe opposite to a side facing the cam shaft with respect to the cam shaft closest to the drain pipe. - 上記カムシャフトに対面する側とは反対側のドレンパイプ側面が局部的に窪んでおり、上記排出口は、この凹部内に位置している請求項５に記載の内燃機関のオイルセパレータ。 6. An oil separator for an internal combustion engine according to claim 5, wherein a side surface of the drain pipe opposite to the side facing the camshaft is locally depressed, and the discharge port is located in the recess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011110118A JP2012241551A (en) | 2011-05-17 | 2011-05-17 | Oil separator of internal combustion engine |
| JP2011-110118 | 2011-05-17 |
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| Publication Number | Publication Date |
|---|---|
| WO2012157309A1 true WO2012157309A1 (en) | 2012-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/054520 WO2012157309A1 (en) | 2011-05-17 | 2012-02-24 | Oil separator for internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012241551A (en) |
| WO (1) | WO2012157309A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339165A (en) * | 2016-05-03 | 2017-11-10 | 福特环球技术公司 | Crankcase oil catcher with hole and seal |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5994362B2 (en) * | 2012-04-27 | 2016-09-21 | トヨタ自動車株式会社 | Engine oil separator |
| JP5979080B2 (en) * | 2013-05-28 | 2016-08-24 | トヨタ自動車株式会社 | Blow-by gas processing device for internal combustion engine |
| JP6412424B2 (en) * | 2014-12-18 | 2018-10-24 | 株式会社マーレ フィルターシステムズ | Oil mist separator |
| JP7124323B2 (en) | 2018-01-25 | 2022-08-24 | トヨタ紡織株式会社 | oil mist separator |
| JP7221702B2 (en) * | 2019-01-11 | 2023-02-14 | 株式会社クボタ | Blow-by gas reflux device |
| JP7148417B2 (en) * | 2019-01-11 | 2022-10-05 | 株式会社クボタ | Blow-by gas reflux device |
| JP7157012B2 (en) * | 2019-06-21 | 2022-10-19 | 株式会社クボタ | Engine with blow-by gas recirculation device |
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| JPH0647611U (en) * | 1992-12-04 | 1994-06-28 | 株式会社クボタ | Breather device for overhead valve engine |
| JP2004204811A (en) * | 2002-12-26 | 2004-07-22 | Mahle Tennex Corp | Oil separator apparatus of blowby gas |
| JP2009197750A (en) * | 2008-02-25 | 2009-09-03 | Daikyonishikawa Corp | Structure of oil separator |
| JP2010203299A (en) * | 2009-03-02 | 2010-09-16 | Toyota Motor Corp | Oil separator |
| JP2011032889A (en) * | 2009-07-30 | 2011-02-17 | Kojima Press Industry Co Ltd | Oil separator for blow-by gas |
| JP2011074900A (en) * | 2009-10-02 | 2011-04-14 | Toyota Motor Corp | Oil separation device of engine |
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2011
- 2011-05-17 JP JP2011110118A patent/JP2012241551A/en active Pending
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2012
- 2012-02-24 WO PCT/JP2012/054520 patent/WO2012157309A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647611U (en) * | 1992-12-04 | 1994-06-28 | 株式会社クボタ | Breather device for overhead valve engine |
| JP2004204811A (en) * | 2002-12-26 | 2004-07-22 | Mahle Tennex Corp | Oil separator apparatus of blowby gas |
| JP2009197750A (en) * | 2008-02-25 | 2009-09-03 | Daikyonishikawa Corp | Structure of oil separator |
| JP2010203299A (en) * | 2009-03-02 | 2010-09-16 | Toyota Motor Corp | Oil separator |
| JP2011032889A (en) * | 2009-07-30 | 2011-02-17 | Kojima Press Industry Co Ltd | Oil separator for blow-by gas |
| JP2011074900A (en) * | 2009-10-02 | 2011-04-14 | Toyota Motor Corp | Oil separation device of engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339165A (en) * | 2016-05-03 | 2017-11-10 | 福特环球技术公司 | Crankcase oil catcher with hole and seal |
| CN107339165B (en) * | 2016-05-03 | 2021-02-09 | 福特环球技术公司 | Crankcase sump having a bore and seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012241551A (en) | 2012-12-10 |
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