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JP4537629B2 - Lubricating oil passage structure of internal combustion engine - Google Patents

Lubricating oil passage structure of internal combustion engine Download PDF

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Publication number
JP4537629B2
JP4537629B2 JP2001267586A JP2001267586A JP4537629B2 JP 4537629 B2 JP4537629 B2 JP 4537629B2 JP 2001267586 A JP2001267586 A JP 2001267586A JP 2001267586 A JP2001267586 A JP 2001267586A JP 4537629 B2 JP4537629 B2 JP 4537629B2
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Prior art keywords
lubricating oil
jet
oil passage
internal combustion
combustion engine
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JP2001267586A
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JP2003074322A (en
Inventor
孝史 石坂
明 鴫原
貴志 金石
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2001267586A priority Critical patent/JP4537629B2/en
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to EP02762893A priority patent/EP1424470B1/en
Priority to ES02762893T priority patent/ES2302837T3/en
Priority to BRPI0205965-7A priority patent/BR0205965B1/en
Priority to PCT/JP2002/008677 priority patent/WO2003023198A1/en
Priority to CNB028170547A priority patent/CN1277044C/en
Priority to KR10-2004-7002764A priority patent/KR100539602B1/en
Priority to ARP020103293A priority patent/AR036397A1/en
Priority to MYPI20023308A priority patent/MY129090A/en
Publication of JP2003074322A publication Critical patent/JP2003074322A/en
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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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/083—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating cylinders
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/086—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、内燃機関の被潤滑部に潤滑油を供給する、内燃機関の潤滑油通路構造に関するものである。
【０００２】
【従来の技術】
一般に内燃機関では、その円滑な運転を保障すべく、その回転、摺動部分などの被潤滑部分に加圧潤滑油を供給するための潤滑油通路が設けられ、また、その潤滑油通路の適所には、絞り通路、すなわちジェットを連通して設け、潤滑油通路を流れる加圧潤滑油をこのジェットを介して噴射し、たとえば、この噴射潤滑油をピストンの裏側部に供給して、ピストンの潤滑と冷却とに供することが行われている（たとえば、特開平９−２０９７３３号公報参照）。
【０００３】
【発明が解決しようとする課題】
ところで、潤滑油通路には、オイルフィルタにより濾過された潤滑油が流れるにせよ、その潤滑油内には、多少の切粉や塵埃などの異物が混入するのを避けられず、この異物が、潤滑油通路に設けた、絞り通路、すなわちジェットの入口に至り、そこを塞ぐことがあり、かかる場合には、ジェットより噴射される潤滑油の油量や噴射圧を減じてしまうという問題がある。
【０００４】
本発明はかかる実情に鑑みてなされたものであり、前記異物によりジェットの入口側が塞がることがないようにした、新規な内燃機関の潤滑油通路構造を提供することを目的とするものである。
【０００５】
【課題を解決するための手段】
前記目的達成のため、本請求項１記載の発明は、オイルポンプに連なる潤滑油通路の適所にジェットを設け、潤滑油通路を流れる加圧潤滑油を、ジェットを通して被潤滑部に向けて噴射するようにした、内燃機関の潤滑油通路構造において、
前記ジェットの入口側には、前記潤滑油通路に開放して該ジェットの中心から径方向に延びる油溝を、該ジェットに連通させて設けたことを特徴としており、かかる特徴によれば、ジェットの入口側が、潤滑油中に混入する塵埃、切粉などの異物により塞がれることが防止され、該ジェットより常に適量、適圧の潤滑油を噴射することができる。
【０００６】
また、前記目的達成のため、本請求項２記載の発明は、前記請求項１記載のものにおいて、前記油溝は、前記ジェットを中心として、その径方向に延びる十字溝であることを特徴としており、かかる特徴によれば、ジェットの入口側が、潤滑油中に混入する塵埃、切粉などの異物により塞がれることが一層確実に防止され、該ジェットより常に適量、適圧の潤滑油を噴射することができる。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態を、添付図面に示した本発明の実施例に基づいて説明する。
【０００８】
まず、図１〜３を参照して、本発明の一実施例について説明する。
、図１は、本発明潤滑油通路構造を備えた内燃機関の要部の断面図、図２は、図１の２線矢視の、仮想円囲い部分の拡大図、図３は、図２の３線矢視の部分図である。
【０００９】
図１において、四サイクル内燃機関の機関本体Ｅは、シリンダボア２を設けたシリンダブロック１と、そのシリンダブロック１のデッキ面上に固定され、シリンダボア２と対面する燃焼室４を形成したシリンダヘッド３と、シリンダブロック１の下面に固定されるクランクケース５とを備えており、このクランクケース５の下面にオイルパン６が固定される。
【００１０】
通常のように、クランクケース５内にはクランクシャフト７がボール軸受８を介して回転自在に支承され、このクランクシャフト７のクランクピン７ａには、コンロッド１０の大端部がニードル軸受１１を介して回転自在に連結され、このコンロッド１０の小端部はシリンダボア２内を摺動自在に嵌合されるピストン１２のピストンピン１３に回転自在に連結されている。
【００１１】
前記機関本体Ｅには、その可動各部を潤滑するための潤滑系Ｌが設けられる。
この潤滑系Ｌは従来公知の構成のものであり、その潤滑系Ｌに接続されるオイルポンプ１５の吸込口に接続される吸込通路１６の下端は、オイルパン６内に貯留される潤滑油に浸漬されるオイルストレーナ１７に接続される。また、オイルポンプ１５の吐出口に接続される吐出通路１８は、シリンダブロック１に形成される、潤滑油通路としてのメインギャラリ２１に連通されている。
【００１２】
メインギャラリ２１の途中には、クランクケース５に形成したピストン用潤滑油通路２４が連通されており、この通路２４の、シリンダボア２に対面する壁部分２４ａには、ジェット２５が開口され、このジェット２５の入口はピストン用潤滑油通路２４に連通され、また、その噴射出口は、シリンダボア２内のピストン１２の裏側部に向けて指向されている。
【００１３】
図２，３に明瞭に示すように、前記ジェット２５の入口側には、本発明にかかる油溝２６が、該ジェット２５の入口側に連通して設けられ、この油溝２６は、図３に示すようにジェット２５を中心として、その径方向に十字状に延びており、この十字状の油溝２６のピストン用潤滑油通路２４と対面する側は、該ピストン用潤滑油通路２４にその略全域にわたり開放されている。
【００１４】
なお、図１中、２８は、クランクシャフト７に形成した潤滑油通路、２９は、クランクシャフト７に連動して図示しない動弁機構を作動する調時伝動装置、３０は、オイルポンプ駆動用の歯車、３１、はトランスミッションに連なるクラッチ駆動用の歯車である。
【００１５】
つぎに、この実施例の作用について説明すると、いま、内燃機関の運転により、クランクシャフト７が回転され、オイルポンプ１５が駆動されると、オイルパン６内の潤滑油はオイルストレーナ１７を経て吸引され、シリンダブロック１に形成した、潤滑油通路としてのメインギャラリ２１に圧送される。
【００１６】
メインギャラリ２１内を流れる加圧潤滑油の一部は、ピストン用潤滑油通路２４に供給される。そして該通路２４に至った潤滑油は、ピストン１２の裏側部に指向させたジェット２５から図１，２の矢印ａに示すように噴射されて、ピストン１２の裏側部に供給され、該ピストン１２やシリンダボア２の内壁面を潤滑すると共にそれらを冷却する。
【００１７】
ところで、メインギャラリ２１を流れる潤滑油は、オイルストレーナ１７により濾過されるものの、微細な塵埃や切粉などの異物Ｒの一部は濾過されずに、メインギャラリ２１からピストン用潤滑油通路２４に至ることがあり、この異物Ｒは図２に仮想線で示すように径小なジェット２５の入口側の中心部分を塞ぐことがあるが、かかる場合に、この実施例のものでは、ジェット２５の入口側に、そこに連通されて、ピストン用潤滑油通路２４側に開放する十字状の油溝２６が径方向に設けられていることにより、ピストン用潤滑油通路２４内の加圧潤滑油は、図２に仮想矢印ｂで示すように、前記十字状の油溝２６を経てジェット２５へと圧送され、ここよりピストン１２の裏側部に向けて噴射させることができる。
【００１８】
以上、本発明の実施例について説明したが、本発明はその実施例に限定されることなく、本発明の範囲内で種々の実施例が可能である。たとえば、前記実施例では、ジェット２５の入口側に設けられる油路には、ジェット２５の中心から径方向に４条の油溝２６が十字状に形成されているが、これに代えてジェット２５の中心から径方向に１〜３条、あるいは５条以上の油溝を形成するようにしてもよい。また、前記実施例では、本発明にかかる潤滑油通路構造を、ピストンの裏側部に指向するジェットに実施した場合を説明したが、これを潤滑油通路に設けられる他のジェットにも実施できることは勿論である。
【００１９】
【発明の効果】
以上のように、本請求項各項記載の発明によれば、内燃機関の潤滑油通路構造において、潤滑油路に設けられるジェットの入口側が、潤滑油中に混入する塵埃、切粉などの異物により塞がれることが防止され、該ジェットより常に適量、適圧の潤滑油を噴射することができる。
【図面の簡単な説明】
【図１】本発明潤滑油通路構造を備えた内燃機関の要部の断面図
【図２】図１の２線矢視の、仮想円囲い部分の拡大図
【図３】図２の３線矢視の部分図
【符号の説明】
１５・・・・・・・・・・・・・・オイルポンプ
２１・・・・・・・・・・・・・・潤滑油通路（メインギャラリ）
２５・・・・・・・・・・・・・・ジェット
２６・・・・・・・・・・・・・・油溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lubricating oil passage structure for an internal combustion engine that supplies lubricating oil to a lubricated portion of the internal combustion engine.
[0002]
[Prior art]
In general, an internal combustion engine is provided with a lubricating oil passage for supplying pressurized lubricating oil to a lubricated part such as a rotating or sliding part in order to ensure its smooth operation. The throttle passage, that is, a jet is provided in communication, and pressurized lubricating oil flowing through the lubricating oil passage is injected through the jet. For example, the injected lubricating oil is supplied to the back side of the piston, It is used for lubrication and cooling (see, for example, JP-A-9-209733).
[0003]
[Problems to be solved by the invention]
By the way, although the lubricating oil filtered by the oil filter flows in the lubricating oil passage, it is inevitable that foreign matter such as some chips and dust is mixed in the lubricating oil. The throttle passage provided in the lubricating oil passage, that is, the inlet of the jet may be blocked, and in such a case, there is a problem that the amount of lubricating oil injected from the jet and the injection pressure are reduced. .
[0004]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a novel lubricating oil passage structure for an internal combustion engine in which the jet inlet side is not blocked by the foreign matter.
[0005]
[Means for Solving the Problems]
In order to achieve the object, according to the first aspect of the present invention, a jet is provided at an appropriate position of a lubricating oil passage connected to an oil pump, and pressurized lubricating oil flowing through the lubricating oil passage is injected through the jet toward a lubrication target portion. In the lubricating oil passage structure of the internal combustion engine,
An oil groove that opens to the lubricating oil passage and extends in a radial direction from the center of the jet is provided on the inlet side of the jet so as to communicate with the jet. Is prevented from being blocked by foreign matter such as dust and chips mixed in the lubricating oil, so that an appropriate amount and an appropriate pressure of lubricating oil can always be injected from the jet.
[0006]
In order to achieve the above object, the invention according to claim 2 is characterized in that, in the invention according to claim 1, the oil groove is a cross groove extending in the radial direction around the jet. According to such a feature, the jet inlet side is more reliably prevented from being clogged with foreign matter such as dust and chips mixed in the lubricating oil, and an appropriate amount and appropriate pressure of lubricating oil is always supplied from the jet. Can be injected.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0008]
First, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view of a main part of an internal combustion engine having a lubricating oil passage structure of the present invention, FIG. 2 is an enlarged view of a virtual circle encircled portion taken along line 2 in FIG. 1, and FIG. FIG.
[0009]
In FIG. 1, an engine body E of a four-cycle internal combustion engine includes a cylinder block 1 provided with a cylinder bore 2 and a cylinder head 3 that is fixed on a deck surface of the cylinder block 1 and that forms a combustion chamber 4 that faces the cylinder bore 2. And a crankcase 5 fixed to the lower surface of the cylinder block 1, and an oil pan 6 is fixed to the lower surface of the crankcase 5.
[0010]
As usual, a crankshaft 7 is rotatably supported in the crankcase 5 via a ball bearing 8, and a large end of a connecting rod 10 is connected to a crankpin 7 a of the crankshaft 7 via a needle bearing 11. The connecting rod 10 is rotatably connected to a piston pin 13 of a piston 12 slidably fitted in the cylinder bore 2.
[0011]
The engine body E is provided with a lubrication system L for lubricating each movable part.
The lubrication system L has a conventionally known configuration, and the lower end of the suction passage 16 connected to the suction port of the oil pump 15 connected to the lubrication system L is used as lubricating oil stored in the oil pan 6. It is connected to the oil strainer 17 to be immersed. The discharge passage 18 connected to the discharge port of the oil pump 15 communicates with a main gallery 21 formed in the cylinder block 1 as a lubricating oil passage.
[0012]
In the middle of the main gallery 21, a piston lubricating oil passage 24 formed in the crankcase 5 is communicated. A jet 25 is opened in a wall portion 24a of the passage 24 facing the cylinder bore 2, and this jet An inlet 25 is communicated with the piston lubricating oil passage 24, and an injection outlet thereof is directed toward the back side of the piston 12 in the cylinder bore 2.
[0013]
As clearly shown in FIGS. 2 and 3, an oil groove 26 according to the present invention is provided on the inlet side of the jet 25 so as to communicate with the inlet side of the jet 25. As shown in FIG. 4, the jet 25 extends in a cross shape in the radial direction around the center, and the side of the cross-shaped oil groove 26 facing the piston lubricant passage 24 is connected to the piston lubricant passage 24. It is open over almost the whole area.
[0014]
In FIG. 1, 28 is a lubricating oil passage formed in the crankshaft 7, 29 is a timing transmission device that operates a valve mechanism (not shown) in conjunction with the crankshaft 7, and 30 is an oil pump drive. A gear 31 is a clutch driving gear connected to the transmission.
[0015]
Next, the operation of this embodiment will be described. Now, when the crankshaft 7 is rotated and the oil pump 15 is driven by the operation of the internal combustion engine, the lubricating oil in the oil pan 6 is sucked through the oil strainer 17. Then, the cylinder block 1 is pumped to a main gallery 21 as a lubricating oil passage.
[0016]
A part of the pressurized lubricating oil flowing in the main gallery 21 is supplied to the piston lubricating oil passage 24. The lubricating oil reaching the passage 24 is jetted as indicated by an arrow a in FIGS. 1 and 2 from a jet 25 directed to the back side of the piston 12 and supplied to the back side of the piston 12. And lubricates the inner wall surface of the cylinder bore 2 and cools them.
[0017]
By the way, although the lubricating oil flowing through the main gallery 21 is filtered by the oil strainer 17, a part of the foreign matter R such as fine dust and chips is not filtered, and is passed from the main gallery 21 to the piston lubricating oil passage 24. This foreign matter R may block the central portion on the inlet side of the small-diameter jet 25 as shown by the phantom line in FIG. 2, but in this case, in this embodiment, By providing a cross-shaped oil groove 26 communicating with the inlet side and opening to the piston lubricating oil passage 24 side in the radial direction, the pressurized lubricating oil in the piston lubricating oil passage 24 is reduced. 2, as indicated by a virtual arrow b in FIG. 2, it is sent to the jet 25 through the cross-shaped oil groove 26, and can be injected toward the back side of the piston 12 from here.
[0018]
As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention. For example, in the above embodiment, four oil grooves 26 are formed in a cross shape in the radial direction from the center of the jet 25 in the oil passage provided on the inlet side of the jet 25, but instead of this, the jet 25 1 to 3 or 5 or more oil grooves may be formed in the radial direction from the center of the nozzle. In the above-described embodiment, the case where the lubricating oil passage structure according to the present invention is applied to the jet directed to the back side of the piston has been described. However, this can be applied to other jets provided in the lubricating oil passage. Of course.
[0019]
【The invention's effect】
As described above, according to the invention described in each claim, in the lubricating oil passage structure of the internal combustion engine, the inlet side of the jet provided in the lubricating oil passage is a foreign matter such as dust or chips mixed in the lubricating oil. Therefore, it is possible to always inject an appropriate amount and pressure of lubricating oil from the jet.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part of an internal combustion engine having a lubricating oil passage structure according to the present invention. FIG. 2 is an enlarged view of a virtual circle encircled portion taken along line 2 in FIG. Partial view of arrow [Explanation of symbols]
15 ... Oil pump 21 ... Lubricating oil passage (main gallery)
25 ... Jet 26 ... Oil groove

Claims (2)

オイルポンプ（１５）に連なる潤滑油通路（２１）の適所にジェット（２５）を設け、潤滑油通路（２１）を流れる加圧潤滑油を、ジェット（２５）を通して被潤滑部に向けて噴射するようにした、内燃機関の潤滑油通路構造において、
前記ジェット（２５）の入口側には、前記潤滑油通路（２１）に開放して該ジェット（２５）の中心から径方向に延びる油溝（２６）を、該ジェット（２５）に連通させて設けたことを特徴とする、内燃機関の潤滑油通路構造。A jet (25) is provided at an appropriate position of the lubricating oil passage (21) connected to the oil pump (15), and pressurized lubricating oil flowing through the lubricating oil passage (21) is injected toward the lubricated part through the jet (25). In the lubricating oil passage structure of the internal combustion engine,
On the inlet side of the jet (25), an oil groove (26) that opens to the lubricating oil passage (21) and extends in the radial direction from the center of the jet (25) communicates with the jet (25). A lubricating oil passage structure for an internal combustion engine, comprising: 前記油溝（２６）は、前記ジェット（２５）を中心として、その径方向に延びる十字溝であることを特徴とする、前記請求項１記載の内燃機関の潤滑油通路構造。The lubricating oil passage structure for an internal combustion engine according to claim 1, wherein the oil groove (26) is a cross groove extending in a radial direction about the jet (25).
JP2001267586A 2001-09-04 2001-09-04 Lubricating oil passage structure of internal combustion engine Expired - Fee Related JP4537629B2 (en)

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JP2001267586A JP4537629B2 (en) 2001-09-04 2001-09-04 Lubricating oil passage structure of internal combustion engine
ES02762893T ES2302837T3 (en) 2001-09-04 2002-08-28 LUBRICATING OIL PASS STRUCTURE IN AN INTERNAL COMBUSTION ENGINE.
BRPI0205965-7A BR0205965B1 (en) 2001-09-04 2002-08-28 structure for the passage of lubricating oil in an internal combustion engine.
PCT/JP2002/008677 WO2003023198A1 (en) 2001-09-04 2002-08-28 Lubrication oil passage structure of internal combustion engine
EP02762893A EP1424470B1 (en) 2001-09-04 2002-08-28 Lubrication oil passage structure of internal combustion engine
CNB028170547A CN1277044C (en) 2001-09-04 2002-08-28 Lubrication oil passage structure of internal combustion engine
KR10-2004-7002764A KR100539602B1 (en) 2001-09-04 2002-08-28 Lubrication oil passage structure of internal combustion engine
ARP020103293A AR036397A1 (en) 2001-09-04 2002-08-30 LUBRICATING OIL PASSAGE STRUCTURE IN INTERNAL COMBUSTION ENGINE
MYPI20023308A MY129090A (en) 2001-09-04 2002-09-04 Lubricating oil passage structure in internal combustion engine

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CN103104376B (en) * 2013-02-06 2015-06-10 苏州科瓴精密机械科技有限公司 Carburetor seat of engine
CN103114943B (en) * 2013-02-26 2015-08-12 苏州科瓴精密机械科技有限公司 The carburetor seat of motor
JP6056090B2 (en) * 2013-02-28 2017-01-11 本田技研工業株式会社 Lubricating oil supply structure in vehicle internal combustion engine

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