JP2007056677A - Forced lubrication engine - Google Patents

Forced lubrication engine Download PDF

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Publication number
JP2007056677A
JP2007056677A JP2005239379A JP2005239379A JP2007056677A JP 2007056677 A JP2007056677 A JP 2007056677A JP 2005239379 A JP2005239379 A JP 2005239379A JP 2005239379 A JP2005239379 A JP 2005239379A JP 2007056677 A JP2007056677 A JP 2007056677A
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oil
suction pipe
engine
oil suction
rear end
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Takatoshi Imai
隆敏 今井
Satoru Maekoya
哲 前小屋
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Kubota Corp
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Kubota Corp
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Priority to JP2005239379A priority Critical patent/JP2007056677A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a forced lubrication engine in which the minimum quantity of engine oil is reduced. <P>SOLUTION: In this forced lubrication engine, the installation direction of a crankshaft 1 is designated as the longitudinal direction, and one side of the direction is designated as the front side and the other side is designated as the rear side. An oil sump 3 is formed at the lower part of a crankcase 2, and an oil strainer 5 is immersed into the oil 4 in the oil sump 3. The oil suction pipe 6 of the oil strainer 5 is guided rearward, and the front end face of a tubular filter 7 is fitted to the rear end of the oil suction pipe 6. The rear end 8 of the oil suction pipe 6 is disposed at the center of the oil sump 3 in the longitudinal direction. When the width direction of the crankcase 2 is designated as the lateral direction and the oil suction pipe 6 is viewed from the side with the engine brought into a horizontal attitude, the rear end opening 9 of the oil suction pipe 6 is diagonally tilted in the rear direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、強制潤滑式エンジンに関し、詳しくは、エンジンオイルの最低油量を少なくすることができる強制潤滑式エンジンに関するものである。   The present invention relates to a forced lubrication engine, and more particularly to a forced lubrication engine that can reduce the minimum amount of engine oil.

従来の強制潤滑式エンジンとして、本発明と同様、クランク軸の架設方向を前後方向とし、任意の一方を前、他方を後として、クランクケースの下部にオイル溜め)を設け、このオイル溜めのエンジンオイルにオイルストレーナを浸漬させ、このオイルストレーナのオイル吸引管を後向きに導出し、このオイル吸引管の後端部に管状フィルタの前端部を嵌合させたものがある(例えば、特許文献1参照)。
この種のエンジンでは、 簡易な構造のオイルストレーナを用いることにより、エンジンの製造コストを安価にすることができる利点がある。また、エンジンが前下り傾斜した場合にはオイルストレーナから空気を吸い込みにくい利点がある。
As a conventional forced lubrication engine, as in the present invention, the crankshaft installation direction is the front-rear direction, an arbitrary one is the front, the other is the rear, and an oil sump is provided at the bottom of the crankcase. An oil strainer is immersed in oil, the oil suction pipe of the oil strainer is led out backward, and the front end of a tubular filter is fitted to the rear end of the oil suction pipe (for example, see Patent Document 1). ).
This type of engine has an advantage that the production cost of the engine can be reduced by using an oil strainer having a simple structure. Further, when the engine is inclined forward and downward, there is an advantage that it is difficult to suck air from the oil strainer.

しかし、上記従来のエンジンでは、オイル溜めの前後方向中央部よりも前寄りにオイル吸引管の後端部を配置しているうえ、クランクケースの幅方向を横方向とし、エンジンを水平な姿勢にしてオイル吸引管を横から見た場合に、その後端開口が垂直になっているため、問題が生じている。   However, in the above conventional engine, the rear end portion of the oil suction pipe is disposed in front of the center portion in the front-rear direction of the oil sump, and the width direction of the crankcase is set in the horizontal direction so that the engine is in a horizontal posture. When the oil suction pipe is viewed from the side, there is a problem because the rear end opening is vertical.

実開昭63−57311号公報(第1図参照)Japanese Utility Model Publication No. 63-57311 (see FIG. 1)

上記従来技術では、次の問題がある。
《問題》 エンジンオイルの最低油量が多くなる。
オイル溜めの前後方向中央部よりも前寄りにオイル吸引管の後端部を配置しているため、エンジンを後下り傾斜させた場合には、すぐにオイル吸引管の後端開口が油面の上に出て、空気を吸い込みやすい。これを抑制するためには、最低油面を高く設定しておく必要があり、エンジンオイルの最低油量が多くなる。
また、仮に、オイル溜めの前後方向中央にオイル吸引管の後端開口を配置したとしても、エンジンを水平姿勢にしてオイル吸引管を横から見た場合に、オイル吸引管の後端開口が垂直のままでは、エンジンオイルの最低油量は多くなる。例えば、図3に例示するように、オイル溜めの前後方向中央にオイル吸引管の垂直な後端開口(109)を配置した場合、後下り傾斜30°をエンジンの傾斜限界とすると、エンジンの傾斜限界で、オイル吸引管の後端開口(109)から空気を吸い込むのを防止するためには、最低油面は鎖線(112)の高さに設定しておかなければならない。
The above prior art has the following problems.
<Problem> The minimum amount of engine oil increases.
Since the rear end of the oil suction pipe is located in front of the center of the oil reservoir in the front-rear direction, the rear end opening of the oil suction pipe immediately It is easy to get up and inhale air. In order to suppress this, the minimum oil level needs to be set high, and the minimum amount of engine oil increases.
Even if the rear end opening of the oil suction pipe is arranged at the center of the oil reservoir in the front-rear direction, the rear end opening of the oil suction pipe is vertical when the engine is in a horizontal position and the oil suction pipe is viewed from the side. If left as it is, the minimum amount of engine oil increases. For example, as shown in FIG. 3, when a vertical rear end opening (109) of the oil suction pipe is arranged at the center in the front-rear direction of the oil sump, the engine inclination is assumed to be the engine inclination limit of the rearward downward inclination of 30 °. At the limit, in order to prevent air from being sucked from the rear end opening (109) of the oil suction pipe, the minimum oil level must be set at the height of the chain line (112).

本発明は、上記問題点を解決することができる強制潤滑式エンジン、すなわち、エンジンオイルの最低油量を少なくすることができる強制潤滑式エンジンを提供することを課題とする。   An object of the present invention is to provide a forced lubrication engine that can solve the above-described problems, that is, a forced lubrication engine that can reduce the minimum amount of engine oil.

請求項1に係る発明の発明特定事項は、次の通りである。
図1に例示するように、クランク軸(1)の架設方向を前後方向とし、任意の一方を前、他方を後として、クランクケース(2)の下部にオイル溜め(3)を設け、このオイル溜め(3)のオイル(4)にオイルストレーナ(5)を浸漬させ、このオイルストレーナ(5)のオイル吸引管(6)を後向きに導出し、このオイル吸引管(6)の後端部に管状フィルタ(7)の前端部を嵌合させた、強制潤滑式エンジンにおいて、
オイル溜め(3)の前後方向中央部にオイル吸引管(6)の後端部(8)を配置し、クランクケース(2)の幅方向を横方向とし、エンジンを水平な姿勢にしてオイル吸引管(6)を横から見た場合に、オイル吸引管(6)の後端開口(9)が後向き上り傾斜状となるようにした、ことを特徴とする強制潤滑式エンジン。
Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 1, an oil sump (3) is provided at the lower part of the crankcase (2) with the installation direction of the crankshaft (1) being the front-rear direction, one of the front being the front and the other being the rear. The oil strainer (5) is immersed in the oil (4) of the reservoir (3), the oil suction pipe (6) of the oil strainer (5) is led out backward, and the oil suction pipe (6) is attached to the rear end of the oil suction pipe (6). In the forced lubrication engine in which the front end of the tubular filter (7) is fitted,
The oil suction pipe (6) has a rear end (8) at the center in the front-rear direction of the oil sump (3), the crankcase (2) is set in the horizontal direction, and the engine is placed in a horizontal position for oil suction. A forced lubrication type engine characterized in that when the pipe (6) is viewed from the side, the rear end opening (9) of the oil suction pipe (6) is inclined upward in a backward direction.

(請求項1に係る発明)
《効果》 エンジンオイルの最低油量を少なくすることができる。
図1に例示するように、オイル溜め(3)の前後方向中央部にオイル吸引管(6)の後端部(8)を配置し、クランクケース(2)の幅方向を横方向とし、エンジンを水平な姿勢にしてオイル吸引管(6)を横から見た場合に、その後端開口(9)が後向き上り傾斜状となるようにした。このため、エンジンオイル(4)の最低油量を少なくすることができる。図3に例示するように、後下り傾斜30°をエンジンの傾斜限界とすると、最低油面を鎖線(112)よりも低い実線(12)の高さまで下げることができる。
(Invention according to Claim 1)
<Effect> The minimum amount of engine oil can be reduced.
As illustrated in FIG. 1, the rear end portion (8) of the oil suction pipe (6) is disposed at the center in the front-rear direction of the oil sump (3), and the width direction of the crankcase (2) is defined as the lateral direction. When the oil suction pipe (6) is viewed from the side with the horizontal position, the rear end opening (9) is inclined upward and backward. For this reason, the minimum oil amount of engine oil (4) can be decreased. As illustrated in FIG. 3, when the rearward downward inclination of 30 ° is the engine inclination limit, the lowest oil level can be lowered to the height of the solid line (12) lower than the chain line (112).

《効果》 管状フィルタのろ過機能の低下を抑制することができる。
図2(B)に示すように、管状フィルタ(7)の前端部のうち、上半部はオイル吸引管(6)の後端部(8)と重なるため、ろ過機能が失われるが、下半部はオイル吸引管(6)の後端部(8)と重ならないため、ろ過機能は失われない。このため、管状フィルタ(7)のろ過機能の低下を抑制することができる。
<< Effect >> The fall of the filtration function of a tubular filter can be controlled.
As shown in FIG. 2 (B), the upper half of the front end of the tubular filter (7) overlaps the rear end (8) of the oil suction pipe (6). Since the half does not overlap with the rear end (8) of the oil suction pipe (6), the filtration function is not lost. For this reason, the fall of the filtration function of a tubular filter (7) can be suppressed.

(請求項2に係る発明)
請求項1に係る発明の効果に加え、次の効果を奏する。
《効果》 エンジンの部品コストを低減することができる。
図2(A)(B)に示すように、簡易な構造の管状フィルタ(7)を用いるため、エンジンの部品コストを低減することができる。
(Invention of Claim 2)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> Engine parts costs can be reduced.
As shown in FIGS. 2 (A) and 2 (B), since the tubular filter (7) having a simple structure is used, the cost of engine parts can be reduced.

本発明の実施の形態を図面に基づいて説明する。図1から図3は本発明の実施形態に係る強制潤滑式エンジンを説明する図で、この実施形態では、縦型多気筒の強制潤滑式ディーゼルエンジンについて説明する。   Embodiments of the present invention will be described with reference to the drawings. 1 to 3 are diagrams for explaining a forced lubrication type engine according to an embodiment of the present invention. In this embodiment, a vertical multi-cylinder forced lubrication type diesel engine will be explained.

本発明の実施形態の概要は、次の通りである。
図1に示すように、クランク軸(1)の架設方向を前後方向とし、冷却ファン(図外)のある方を前、フライホイル(12)のある方を後として、クランクケース(2)の下部にオイル溜め(3)を設け、このオイル溜め(3)のエンジンオイル(4)にオイルストレーナ(5)を浸漬させ、このオイルストレーナ(5)のオイル吸引管(6)を後向きに導出し、このオイル吸引管(6)の後端部に管状フィルタ(7)の前端部を嵌合させている。オイル溜め(3)は板金製のオイルパンである。オイル吸引管(6)は金属製の丸パイプでその基端部はクランクケース(2)の底に固定され、オイルポンプ(15)と連通している。オイル吸引管(6)は、クランクケース(2)の底から垂直下向き、後方斜め下向き、水平後向きの順で方向を変えながら、後向きに導出されている。
The outline of the embodiment of the present invention is as follows.
As shown in FIG. 1, the installation direction of the crankshaft (1) is the front-rear direction, the front with the cooling fan (not shown) and the rear with the flywheel (12). An oil sump (3) is provided at the bottom, the oil strainer (5) is immersed in the engine oil (4) of the oil sump (3), and the oil suction pipe (6) of the oil strainer (5) is led out backwards. The front end of the tubular filter (7) is fitted to the rear end of the oil suction pipe (6). The oil sump (3) is a sheet metal oil pan. The oil suction pipe (6) is a metal round pipe whose base end is fixed to the bottom of the crankcase (2) and communicates with the oil pump (15). The oil suction pipe (6) is led backward from the bottom of the crankcase (2) while changing the direction in the order of vertically downward, diagonally downward and horizontally rearward.

オイル吸引管の構成は、次の通りである。
図1に示すように、オイル溜め(3)の前後方向中央部にオイル吸引管(6)の後端部(8)を配置し、クランクケース(2)の幅方向を横方向とし、エンジンを水平な姿勢にしてオイル吸引管(6)を横から見た場合に、オイル吸引管(6)の後端開口(9)が後向き上り傾斜状となるようにしている。オイル吸引管(6)の後端部(8)の下部がオイル溜め(3)の前後方向中央にくるようにしている。オイル吸引管(6)の後端開口(9)の仰角は30°に設定している。この仰角は15°〜45°の範囲で設定するのが望ましく、20°〜40°の範囲で設定するのがより望ましく、25°〜35°の範囲で設定するのが最も望ましい。
The configuration of the oil suction pipe is as follows.
As shown in FIG. 1, the rear end (8) of the oil suction pipe (6) is arranged at the center in the front-rear direction of the oil sump (3), the width direction of the crankcase (2) is the lateral direction, and the engine is When the oil suction pipe (6) is viewed from the side in a horizontal posture, the rear end opening (9) of the oil suction pipe (6) is inclined upward and backward. The lower part of the rear end portion (8) of the oil suction pipe (6) is arranged in the center of the oil reservoir (3) in the front-rear direction. The elevation angle of the rear end opening (9) of the oil suction pipe (6) is set to 30 °. The elevation angle is desirably set in the range of 15 ° to 45 °, more desirably in the range of 20 ° to 40 °, and most desirably in the range of 25 ° to 35 °.

図3に示すように、このエンジンは、後下り傾斜30°を傾斜限界としており、最低油面は実線(12)の高さまで下げることができる。仮に、エンジンを水平姿勢にしてオイル吸引管(6)を横から見た場合に、オイル吸引管(6)の後端開口(109)が垂直になるようにし、このオイル吸引管(6)の後端開口(109)がオイル溜め(3)の前後方向中央にくるようにした場合、最低油面は鎖線(112)の位置にくる。この実施形態の場合には、最低油面を鎖線(112)の位置から実線(12)の位置まで下げることができ、14リットルの最低油量を10リットルまで減少させることができた。   As shown in FIG. 3, this engine has a rearward downward inclination of 30 ° as an inclination limit, and the minimum oil level can be lowered to the height of the solid line (12). If the oil suction pipe (6) is viewed from the side with the engine in a horizontal position, the rear end opening (109) of the oil suction pipe (6) is made vertical, and the oil suction pipe (6) When the rear end opening (109) is positioned at the center of the oil reservoir (3) in the front-rear direction, the lowest oil level is at the position of the chain line (112). In the case of this embodiment, the minimum oil level could be lowered from the position of the chain line (112) to the position of the solid line (12), and the minimum oil amount of 14 liters could be reduced to 10 liters.

管状フィルタの構成は、次の通りである。
図2に示すように、管状フィルタ(7)は管状に丸めたパンチングメタルで形成し、その先端(10)は横から見て先窄まりの楔型に押し潰し、先端縁部(11)は合掌させて封止している。この管状フィルタ(7)の前端部はオイル吸引管(6)の後端部に外嵌し、溶接で固定している。管状フィルタ(7)の継ぎ目はロウ付けで封止している。
The configuration of the tubular filter is as follows.
As shown in FIG. 2, the tubular filter (7) is formed by punching metal rolled into a tubular shape, and its tip (10) is crushed into a tapered wedge shape when viewed from the side, and the tip edge (11) is Sealed with a palm. The front end portion of the tubular filter (7) is fitted on the rear end portion of the oil suction pipe (6) and fixed by welding. The joint of the tubular filter (7) is sealed by brazing.

本発明の実施形態に係る強制潤滑式エンジンの縦断側面図である。1 is a longitudinal side view of a forced lubrication engine according to an embodiment of the present invention. 図1のエンジンで用いるオイルストレーナを説明する図で、図2(A)は平面図、図2(B)は側面図である。FIG. 2A is a plan view and FIG. 2B is a side view for explaining an oil strainer used in the engine of FIG. 1. 図1のエンジンの傾斜限界での最低油面を説明する図である。It is a figure explaining the minimum oil level in the inclination limit of the engine of FIG.

符号の説明Explanation of symbols

(1) クランク軸
(2) クランクケース
(3) オイル溜め
(4) エンジンオイル
(5) オイルストレーナ
(6) オイル吸引管
(7) 管状フィルタ
(8) オイル吸引管の後端部
(9) オイル吸引管の後端開口
(10) 管状フィルタの先端
(11) 管状フィルタの先端縁部

(1) Crankshaft
(2) Crankcase
(3) Oil sump
(4) Engine oil
(5) Oil strainer
(6) Oil suction pipe
(7) Tubular filter
(8) Rear end of oil suction pipe
(9) Rear end opening of oil suction pipe
(10) Tip of tubular filter
(11) Tip edge of tubular filter

Claims (2)

クランク軸(1)の架設方向を前後方向とし、任意の一方を前、他方を後として、クランクケース(2)の下部にオイル溜め(3)を設け、このオイル溜め(3)のエンジンオイル(4)にオイルストレーナ(5)を浸漬させ、このオイルストレーナ(5)のオイル吸引管(6)を後向きに導出し、このオイル吸引管(6)の後端部に管状フィルタ(7)の前端部を嵌合させた、強制潤滑式エンジンにおいて、
オイル溜め(3)の前後方向中央部にオイル吸引管(6)の後端部(8)を配置し、クランクケース(2)の幅方向を横方向とし、エンジンを水平な姿勢にしてオイル吸引管(6)を横から見た場合に、オイル吸引管(6)の後端開口(9)が後向き上り傾斜状となるようにした、ことを特徴とする強制潤滑式エンジン。
An oil sump (3) is provided at the lower part of the crankcase (2) with the direction of the crankshaft (1) installed in the front-rear direction, one of the front and the other as the back, and engine oil ( 4) The oil strainer (5) is immersed in 4), the oil suction pipe (6) of the oil strainer (5) is led out rearward, and the front end of the tubular filter (7) is connected to the rear end of the oil suction pipe (6). In the forced lubrication type engine,
The oil suction pipe (6) has a rear end (8) at the center in the front-rear direction of the oil sump (3), the crankcase (2) is set in the horizontal direction, and the engine is placed in a horizontal position for oil suction. A forced lubrication type engine characterized in that when the pipe (6) is viewed from the side, the rear end opening (9) of the oil suction pipe (6) is inclined upward in a backward direction.
請求項1に記載した強制潤滑式エンジンにおいて、
管状フィルタ(7)は管状に丸めたパンチングメタルで形成し、その先端(10)は楔型に押し潰し、先端縁部(11)は合掌させて封止した、ことを特徴とする強制潤滑式エンジン。

In the forced lubrication engine according to claim 1,
The tubular filter (7) is made of punched metal rounded into a tubular shape, its tip (10) is crushed into a wedge shape, and the tip edge (11) is sealed by sealing with a palm. engine.

JP2005239379A 2005-08-22 2005-08-22 Forced lubrication engine Pending JP2007056677A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2053274A2 (en) 2007-10-23 2009-04-29 Toyota Jidosha Kabusiki Kaisha Oil suction system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2053274A2 (en) 2007-10-23 2009-04-29 Toyota Jidosha Kabusiki Kaisha Oil suction system
JP2009103215A (en) * 2007-10-23 2009-05-14 Toyota Motor Corp Oil suction device
US8292036B2 (en) 2007-10-23 2012-10-23 Toyota Jidosha Kabushiki Kaisha Oil suction system

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