JPH11287154A - Piston for internal combustion engine - Google Patents

Piston for internal combustion engine

Info

Publication number
JPH11287154A
JPH11287154A JP9012098A JP9012098A JPH11287154A JP H11287154 A JPH11287154 A JP H11287154A JP 9012098 A JP9012098 A JP 9012098A JP 9012098 A JP9012098 A JP 9012098A JP H11287154 A JPH11287154 A JP H11287154A
Authority
JP
Japan
Prior art keywords
oil
piston
pin hole
pin
internal combustion
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.)
Pending
Application number
JP9012098A
Other languages
Japanese (ja)
Inventor
Yasuo Takashima
安雄 高島
Takao Takagi
岳雄 高木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Unisia Automotive Ltd
Original Assignee
Unisia Jecs Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unisia Jecs Corp filed Critical Unisia Jecs Corp
Priority to JP9012098A priority Critical patent/JPH11287154A/en
Publication of JPH11287154A publication Critical patent/JPH11287154A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00Pistons 
    • F02F3/16Pistons  having cooling means
    • F02F3/20Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/08Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/086Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PROBLEM TO BE SOLVED: To secure excellent oil flow and oil supply to an oil cooling hollow by arranging an oil supply passage from the oil cooling hollow toward a pin hole in a pin boss part and connecting the oil supply passage to a notch type groove part formed in the vicinity of the pin hole across the pin hole. SOLUTION: This piston is provided with an oil cooling hollow 4 in the top part, and an oil in-flow passage 5 and an oil out-flow passage 6 are arranged in the oil cooling hollow 4. In this case, an oil supply passage 7 is arranged from the oil cooling hollow 4 toward a pin hole 2 in a pin boss part 3, and the oil supply passage 7 is communicating to a notch type groove part 8 formed in the vicinity of the pin hole 2.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は内燃機関用のピスト
ンに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piston for an internal combustion engine.

【0002】[0002]

【従来の技術】従来、内燃機関用のピストンとしては、
例えば、実開平2−50046号公報に記載されるよう
に、ピストンの頂部側にオイル冷却用空洞が設けられ、
このオイル冷却用空洞に連通するよう設けられたオイル
流入通路およびオイル流出通路が切欠状溝部を介して夫
々ピン孔と連通されている。
2. Description of the Related Art Conventionally, as pistons for internal combustion engines,
For example, as described in Japanese Utility Model Laid-Open No. 2-50046, an oil cooling cavity is provided on the top side of the piston,
An oil inflow passage and an oil outflow passage provided so as to communicate with the oil cooling cavity are respectively communicated with the pin holes through cutout grooves.

【0003】[0003]

【発明が解決しようとする課題】しかし乍ら、このよう
な従来の内燃機関用のピストンにおいては、ピストン頂
部に設けられたオイル冷却用空洞から下方に対してオイ
ル流入通路およびオイル流出通路をピンボス部にほぼ垂
直方向に設けて、ピン孔に最も近接した個所にて切欠状
溝部を設けてピン孔と連通させる構造と成っているため
に、オイル流入口からのオイルが切欠状溝部から流出し
易く、オイル冷却用空洞へのオイル流量が少なくなって
冷却効率の悪化が起こると共に、オイル流入および流出
通路の開口部を切欠状溝部より下方に夫々設定すること
が必要となるために質量の増加の原因となる。
However, in such a conventional piston for an internal combustion engine, an oil inflow passage and an oil outflow passage are provided below the oil cooling cavity provided at the top of the piston. The oil flow from the oil inlet flows out of the notch groove because the cutout groove is provided at the location closest to the pin hole and communicates with the pin hole. Easily, the oil flow rate to the oil cooling cavity is reduced, and the cooling efficiency is deteriorated. In addition, it is necessary to set the openings of the oil inflow and outflow passages below the notch-shaped groove, thereby increasing the mass. Cause.

【0004】従って、オイルジェットからの冷却用空洞
へのオイル供給量を確保するためには、十分大きな孔径
の流入および流出通路を得ることが必要となるために、
ピンボス部における強度等からピンボス部を肉厚とする
必要があるために重量が増大する等の問題が見られる。
Therefore, in order to secure the oil supply from the oil jet to the cooling cavity, it is necessary to obtain an inflow and outflow passage having a sufficiently large hole diameter.
Since the pin boss portion needs to be thick due to the strength and the like at the pin boss portion, there are problems such as an increase in weight.

【0005】本発明の目的は、このような従来における
問題を解決するために、オイル流入および流出通路を有
するオイル冷却用空洞から、該オイル流入および流出通
路から独立したピンボス部のピン孔に通じるオイル供給
通路を設けて、オイル供給通路がピン孔と交叉する部分
の切欠状溝部を介してピン孔へのオイルの流れを良好に
すると共に、オイル冷却用空洞へのオイル供給量を確保
することを特徴とする内燃機関用ピストンを提供するこ
とにある。
An object of the present invention is to solve such a conventional problem by connecting an oil cooling cavity having oil inflow and outflow passages to a pin hole of a pin boss portion independent of the oil inflow and outflow passages. Providing an oil supply passage to improve the flow of oil to the pin hole through the cut-out groove at the portion where the oil supply passage intersects the pin hole, and to secure an oil supply amount to the oil cooling cavity. An object of the present invention is to provide a piston for an internal combustion engine characterized by the following.

【0006】[0006]

【課題を解決するための手段】上述の目的を達成するた
めに、本発明によれば、内燃機関用ピストンは、頂部に
オイル冷却用空洞を有し、該オイル冷却用空洞にオイル
流入通路とオイル流出通路とが設けられた内燃機関用ピ
ストンにおいて、オイル冷却用空洞からピンボス部のピ
ン孔に向かってオイル供給通路が設けられて、該オイル
供給通路とピン孔と交叉するピン孔周辺部に形成された
切欠状溝部が連通されていることを特徴とする。
According to the present invention, there is provided, in accordance with the present invention, a piston for an internal combustion engine having an oil cooling cavity at the top, and an oil inflow passage in the oil cooling cavity. In an internal combustion engine piston provided with an oil outflow passage, an oil supply passage is provided from an oil cooling cavity toward a pin hole of a pin boss portion, and the oil supply passage is provided around a pin hole crossing the oil supply passage and the pin hole. It is characterized in that the formed notch-shaped grooves are communicated.

【0007】また、本発明の内燃機関用ピストンは、前
記オイル供給通路がオイル冷却用空洞からピン孔に向か
って傾斜して設けられていることを特徴とする。
The piston for an internal combustion engine according to the present invention is characterized in that the oil supply passage is provided to be inclined from the oil cooling cavity toward the pin hole.

【0008】更に、本発明の内燃機関用ピストンは、前
記オイル供給通路がオイル冷却用空洞からピン孔に向か
ってほぼ直角に設けられていることを特徴とする。
Further, the piston for an internal combustion engine of the present invention is characterized in that the oil supply passage is provided substantially at a right angle from the oil cooling cavity to the pin hole.

【0009】更にまた、本発明の内燃機関用ピストン
は、ピン孔の周壁面に環状の周溝が設けられていること
を特徴とする。
Furthermore, the piston for an internal combustion engine of the present invention is characterized in that an annular peripheral groove is provided on the peripheral wall surface of the pin hole.

【0010】[0010]

【発明の実施の形態】このように、本発明によれば、内
燃機関用ピストンは、オイル流入通路とオイル流出通路
とが設けられた頂部のオイル冷却用空洞からピンボス部
のピン孔に向かってオイル供給通路が設けられて、ピン
孔周辺部に切欠状溝部が形成されており、これによっ
て、オイル流入通路からオイル冷却用空洞を経てオイル
流出通路より流出するオイルの一部がオイル冷却用空洞
においてオイル供給通路を経てピンボス部へと流れ、更
に、ピン孔の周辺部の切欠状溝部からピン孔へと流れ
て、ピストンピンを好適に冷却、潤滑することができ
る。
As described above, according to the present invention, the piston for an internal combustion engine moves from the oil cooling cavity at the top provided with the oil inflow passage and the oil outflow passage toward the pin hole of the pin boss. An oil supply passage is provided, and a notch-shaped groove is formed around the pin hole, so that a portion of oil flowing out of the oil inflow passage through the oil cooling passage through the oil outflow passage is partially removed from the oil cooling passage. In this case, the oil flows through the oil supply passage to the pin boss portion, and further flows from the notch-shaped groove around the pin hole to the pin hole, so that the piston pin can be suitably cooled and lubricated.

【0011】また、本発明によれば、内燃機関用ピスト
ンは、ピン孔の周壁に環状の周溝を設けてピンとピン孔
間へのオイル供給を行うことができると共に、オイル冷
却用空洞への十分なオイル供給量を確保することができ
るので、ピストンピンの焼き付きを防止することができ
る。
Further, according to the present invention, the piston for an internal combustion engine can provide an oil supply between the pin and the pin hole by providing an annular peripheral groove on the peripheral wall of the pin hole, and can supply the oil to the oil cooling cavity. Since a sufficient oil supply amount can be secured, seizure of the piston pin can be prevented.

【0012】本発明の他の目的や特徴は以下の添付図面
に沿っての詳細な説明から明らかになろう。
Other objects and features of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

【0013】図面には本発明の内燃機関用ピストンの第
1乃至第3の実施例が示されており、図1乃至図3には
本発明の第1の実施例が示され、図4および図5には本
発明の第2の実施例が示され、図6には本発明の第3の
実施例が示されている。
The drawings show first to third embodiments of the piston for an internal combustion engine of the present invention. FIGS. 1 to 3 show the first embodiment of the present invention, and FIGS. FIG. 5 shows a second embodiment of the present invention, and FIG. 6 shows a third embodiment of the present invention.

【0014】(実施例1)図1乃至図3に示されるよう
に、本発明の第1の実施例における内燃機関用ピストン
は、頂部にほぼ環状のオイル冷却用空洞4が設けられた
ピストン本体1から成り、一対のオイル流入通路5およ
びオイル流出通路6がオイル冷却用空洞4に対してほぼ
垂直な方向に且つ直径方向に対向して設けられている。
このようなオイル冷却用空洞4に対してオイル供給通路
7がピンボス部3にピストン軸線から略垂直方向のピン
ボス部3の側面に貫通し、傾斜して穿設されており、ピ
ン孔2の周辺部と交叉していて、切欠状溝部8が形成さ
れている。
(Embodiment 1) As shown in FIGS. 1 to 3, a piston for an internal combustion engine according to a first embodiment of the present invention has a piston body having a substantially annular oil cooling cavity 4 provided at the top. A pair of oil inflow passages 5 and oil outflow passages 6 are provided in a direction substantially perpendicular to the oil cooling cavity 4 and diametrically opposed.
An oil supply passage 7 penetrates through the pin boss portion 3 on the side surface of the pin boss portion 3 in a direction substantially perpendicular to the piston axis and is formed obliquely in the pin boss portion 3 with respect to the oil cooling cavity 4. A notch-shaped groove 8 is formed so as to cross the portion.

【0015】従って、オイル冷却用空洞4からのオイル
の一部がこのオイル供給通路7、7を通ってピン孔2に
向かって流れて切欠状溝部8、8を介してピン孔2に流
れ、ピン孔2における冷却とピストンピンの潤滑が好適
に行われる。このようなオイル供給通路7はドリルによ
る孔穿け加工により設けることができ、傾斜角度、切欠
状溝部8の大きさ、長さ等を所定の如く決めることがで
きる。
Therefore, a part of the oil from the oil cooling cavity 4 flows toward the pin hole 2 through the oil supply passages 7 and 7 and flows into the pin hole 2 through the notched grooves 8 and 8. Cooling in the pin hole 2 and lubrication of the piston pin are suitably performed. Such an oil supply passage 7 can be provided by drilling a hole, and the inclination angle, the size and length of the notch-shaped groove 8 can be determined as predetermined.

【0016】更に、オイル供給通路がピストン軸線から
略垂直方向のピンボス部3の側面に貫通しているため、
ピンボス部3の強度を低下させることなく、高強度のピ
ストンを提供できる。
Further, since the oil supply passage penetrates the side surface of the pin boss portion 3 substantially perpendicular to the piston axis,
A high-strength piston can be provided without reducing the strength of the pin boss portion 3.

【0017】(実施例2)図4および図5には、本発明
の第2の実施例が示されており、本例ではオイル供給通
路10、10がオイル冷却用空洞4からほぼ直角にピン
孔2の周辺に接するように接線方向に延びる通路として
形成されている。このようなオイル供給通路10は、例
えば塩中子のような可容性中子を用いてピストン鋳造時
オイル冷却用空洞と一体形成して作ることができる。従
って、オイル供給通路10がピン孔2と接線方向に開口
した部分に切欠状溝部11が設けられて、オイル冷却用
空洞4からのオイルがオイル供給通路10および切欠状
溝部11を介してピン孔2に良好に流れることによって
ピン孔2における冷却とピストンピンの潤滑を好適に行
うことができる。しかも、オイル供給通路10はピンボ
ス部3の上部のみに形成され、ピンボス部3の下部を貫
通しておらず、オイル冷却用空洞からのオイルをピン孔
2内で長く滞留させることができるため、ピン孔2にお
ける冷却とピストンピンの潤滑を向上させることができ
る。更に、オイル供給通路10がピンボス部3の下部を
貫通していないため、ピンボス部3の強度を低下させる
ことがなく、高強度のピストンを提供できる。
(Embodiment 2) FIGS. 4 and 5 show a second embodiment of the present invention. In this embodiment, the oil supply passages 10 and 10 are pinned almost at right angles from the oil cooling cavity 4. It is formed as a passage extending tangentially so as to be in contact with the periphery of the hole 2. Such an oil supply passage 10 can be formed integrally with an oil cooling cavity at the time of casting a piston by using a soluble core such as a salt core. Therefore, a notch-shaped groove 11 is provided at a portion where the oil supply passage 10 is opened in a tangential direction to the pin hole 2, and oil from the oil cooling cavity 4 passes through the oil supply passage 10 and the notch-shaped groove 11. 2, the cooling in the pin hole 2 and the lubrication of the piston pin can be suitably performed. Moreover, the oil supply passage 10 is formed only in the upper portion of the pin boss portion 3 and does not penetrate the lower portion of the pin boss portion 3, so that oil from the oil cooling cavity can stay in the pin hole 2 for a long time. Cooling in the pin hole 2 and lubrication of the piston pin can be improved. Furthermore, since the oil supply passage 10 does not penetrate the lower part of the pin boss 3, the piston of high strength can be provided without reducing the strength of the pin boss 3.

【0018】(実施例3)図6には本発明の第3の実施
例が示されており、本例においては実施例1,2の構成
を前提としてピンボス部13のピン孔14の周壁面に環
状の周溝15が設けられると共にオイル供給通路7が周
溝15と交叉するよう設けられており、ピストンピン全
周にオイルを供給できピストンピン16とピン孔14間
へのオイル供給を好適に行うように構成されている。従
って、ピストンピン16とピン孔14との潤滑性を向上
でき、ピストンピン16の焼付きを防止することができ
る。
(Embodiment 3) FIG. 6 shows a third embodiment of the present invention. In the present embodiment, the peripheral wall surface of the pin hole 14 of the pin boss 13 is premised on the configuration of the first and second embodiments. An annular peripheral groove 15 is provided on the piston, and the oil supply passage 7 is provided so as to intersect the peripheral groove 15 so that oil can be supplied to the entire circumference of the piston pin, and oil supply between the piston pin 16 and the pin hole 14 is preferable. It is configured to do so. Therefore, the lubricity between the piston pin 16 and the pin hole 14 can be improved, and seizure of the piston pin 16 can be prevented.

【0019】尚、オイル供給通路をピン孔に向かって直
角に設けたり、傾斜して設けたりする理由として、切欠
状溝部がピン孔内でどの位置に形成されるかによって直
角にするか、傾斜にするかを決めるものである。更に、
オイル供給通路をピンボス部の下部に貫通して設けない
理由として、ピストン上昇行程時に発生するピストン慣
性力を支持するためにピンボス部の下部の強度低下を防
止するためである。
The reason why the oil supply passage is provided at right angles to the pin hole or is provided at an angle is to make the oil supply passage at a right angle or at an angle depending on where the notched groove is formed in the pin hole. To decide what to do. Furthermore,
The reason why the oil supply passage is not provided through the lower portion of the pin boss portion is to prevent a decrease in strength of the lower portion of the pin boss portion in order to support a piston inertia force generated during a piston ascent stroke.

【0020】[0020]

【発明の効果】以上に説明したように、本発明の請求項
1記載の内燃機関用ピストンによれば、頂部に形成され
たオイル冷却用空洞に連通するオイル流入通路とオイル
流出通路とが設けられた内燃機関用ピストンにおいて、
オイル冷却用空洞からピンボス部のピン孔に向かってオ
イル供給通路が設けられて、該オイル供給通路とピン孔
と交叉するピン周辺部に形成された切欠状溝部が連通さ
れているので、オイル冷却用空洞のオイルの一部がオイ
ル冷却用空洞からオイル供給通路を経てピンボス部へと
流れ、更に、ピン孔の周辺部の切欠状溝部からピン孔へ
と流れて、ピストンピンを好適に冷却、潤滑することが
できる。しかも、オイル供給通路はピンボス部の上部の
みに形成され、ピンボス部の下部を貫通しておらず、オ
イル冷却用空洞からのオイルをピン孔内で長く滞留させ
ることができるためピン孔における冷却とピストンピン
の潤滑を向上させることができる。
As described above, according to the piston for an internal combustion engine of the first aspect of the present invention, the oil inflow passage and the oil outflow passage communicating with the oil cooling cavity formed at the top are provided. The internal combustion engine piston,
An oil supply passage is provided from the oil cooling cavity to the pin hole of the pin boss, and the oil supply passage communicates with the notch groove formed in the pin peripheral portion that intersects the pin hole. Part of the oil in the cavity for oil flows from the oil cooling cavity to the pin boss via the oil supply passage, and further flows from the notch-shaped groove around the pin hole to the pin hole, thereby suitably cooling the piston pin. Can be lubricated. In addition, the oil supply passage is formed only in the upper portion of the pin boss portion and does not penetrate the lower portion of the pin boss portion, so that the oil from the oil cooling cavity can be retained in the pin hole for a long time. Lubrication of the piston pin can be improved.

【0021】また、本発明の請求項2記載の内燃機関用
ピストンは、前記オイル供給通路がオイル冷却用空洞か
らピン孔に向かって傾斜して設けられているので、オイ
ルがピン孔に良好に流れてピストンピンを好適に冷却お
よび潤滑することができる。
Further, in the piston for an internal combustion engine according to the second aspect of the present invention, since the oil supply passage is provided to be inclined from the oil cooling cavity toward the pin hole, the oil can be favorably supplied to the pin hole. The flow can suitably cool and lubricate the piston pin.

【0022】更に、オイル供給通路がピストン軸線から
略垂直方向のピンボス部の側面に貫通しているため、ピ
ンボス部の強度を低下させることなく、高強度のピスト
ンを提供できる。
Further, since the oil supply passage penetrates the side surface of the pin boss in a direction substantially perpendicular to the piston axis, a high-strength piston can be provided without reducing the strength of the pin boss.

【0023】更に、本発明の請求項3記載の内燃機関用
ピストンは、前記オイル供給通路がオイル冷却用空洞か
らピン孔に向かってほぼ直角に設けられているので、オ
イルがピン孔に向かって良好に流れることができる。し
かも、オイル供給通路を塩中子のような可溶性中子を用
いて、ピストン鋳造時、オイル冷却用空洞と一体的に形
成できるため、製造コストを低減できる。
Further, in the piston for an internal combustion engine according to the third aspect of the present invention, the oil supply passage is provided substantially at a right angle from the oil cooling cavity toward the pin hole. Can flow well. In addition, the oil supply passage can be formed integrally with the oil cooling cavity during casting of the piston by using a soluble core such as a salt core, so that the manufacturing cost can be reduced.

【0024】更にまた、本発明の請求項4記載の内燃機
関用ピストンは、ピン孔の周壁面に環状の周溝が設けら
れているので、ピンとピン孔間へのオイル供給を行うこ
とができると共に、オイル冷却用空洞への十分なオイル
供給量を確保することができるので、ピストンピンの焼
き付きを防止することができる。
Further, in the piston for an internal combustion engine according to the fourth aspect of the present invention, since an annular peripheral groove is provided on the peripheral wall surface of the pin hole, oil can be supplied between the pin and the pin hole. At the same time, a sufficient amount of oil supply to the oil cooling cavity can be secured, so that seizure of the piston pin can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の内燃機関用ピストンの第1の実施例を
示す縦断面図である。
FIG. 1 is a longitudinal sectional view showing a first embodiment of a piston for an internal combustion engine of the present invention.

【図2】図1の本発明の内燃機関用ピストンの底面図で
ある。
FIG. 2 is a bottom view of the internal combustion engine piston of the present invention shown in FIG. 1;

【図3】図1の本発明の内燃機関用ピストンのピンボス
部のオイル供給通路を示すピンボス部の断面部分図であ
る。
3 is a partial sectional view of the pin boss showing an oil supply passage of the pin boss of the piston for an internal combustion engine of the present invention in FIG. 1;

【図4】本発明の内燃機関用ピストンの第2の実施例を
示す縦断面図である。
FIG. 4 is a longitudinal sectional view showing a second embodiment of the piston for an internal combustion engine of the present invention.

【図5】図4の本発明の内燃機関用ピストンのピンボス
部のオイル供給通路を示すピンボス部の断面部分図であ
る。
FIG. 5 is a partial sectional view of the pin boss showing an oil supply passage of the pin boss of the piston for an internal combustion engine of the present invention in FIG. 4;

【図6】本発明の内燃機関用ピストンの第3の実施例を
示す横断面図である。
FIG. 6 is a cross-sectional view showing a third embodiment of the piston for an internal combustion engine of the present invention.

【符号の説明】[Explanation of symbols]

1 ピストン本体 2 ピン孔 3 ピンボス部 4 オイル冷却用空洞 5 オイル流入通路 6 オイル流出通路 7 オイル供給通路 8 切欠状溝部 10 オイル供給通路 11 切欠状溝部 13 ピンボス部 14 ピン孔 15 周溝 16 ピストンピン DESCRIPTION OF SYMBOLS 1 Piston main body 2 Pin hole 3 Pin boss part 4 Oil cooling cavity 5 Oil inflow passage 6 Oil outflow passage 7 Oil supply passage 8 Notch groove 10 Oil supply passage 11 Notch groove 13 Pin boss part 14 Pin hole 15 Peripheral groove 16 Piston pin

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 頂部に形成されたオイル冷却用空洞に連
通するオイル流入通路とオイル流出通路とが設けられた
内燃機関用ピストンにおいて、 オイル冷却用空洞からピンボス部のピン孔に向かってオ
イル供給通路が設けられて、該オイル供給通路とピン孔
と交叉するピン孔周辺部に形成された切欠状溝部が連通
されていることを特徴とする内燃機関用ピストン。
In an internal combustion engine piston provided with an oil inflow passage and an oil outflow passage communicating with an oil cooling cavity formed in a top portion, oil is supplied from the oil cooling cavity toward a pin hole of a pin boss portion. A piston for an internal combustion engine, wherein a passage is provided, and a cut-out groove formed around a pin hole intersecting the oil supply passage and the pin hole communicates with the oil supply passage.
【請求項2】 前記オイル供給通路がオイル冷却用空洞
からピン孔に向かって傾斜して設けられていることを特
徴とする請求項1記載の内燃機関用ピストン。
2. The internal combustion engine piston according to claim 1, wherein the oil supply passage is provided to be inclined from the oil cooling cavity toward the pin hole.
【請求項3】 前記オイル供給通路がオイル冷却用空洞
からピン孔に向かってほぼ直角に設けられていることを
特徴とする請求項1記載の内燃機関用ピストン。
3. The internal combustion engine piston according to claim 1, wherein the oil supply passage is provided substantially at right angles from the oil cooling cavity to the pin hole.
【請求項4】 前記ピン孔の周壁面に環状の周溝が設け
られていることを特徴とする請求項1乃至3いずれか記
載の内燃機関用ピストン。
4. The piston for an internal combustion engine according to claim 1, wherein an annular peripheral groove is provided on a peripheral wall surface of the pin hole.
JP9012098A 1998-04-02 1998-04-02 Piston for internal combustion engine Pending JPH11287154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9012098A JPH11287154A (en) 1998-04-02 1998-04-02 Piston for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9012098A JPH11287154A (en) 1998-04-02 1998-04-02 Piston for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH11287154A true JPH11287154A (en) 1999-10-19

Family

ID=13989661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9012098A Pending JPH11287154A (en) 1998-04-02 1998-04-02 Piston for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH11287154A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1427922A1 (en) * 2001-09-19 2004-06-16 Federal-Mogul Corporation Closed gallery piston having pin bore lubrication
WO2008124807A1 (en) * 2007-04-10 2008-10-16 Federal-Mogul Corporation Piston with pin bore lubrication features
JP2009216416A (en) * 2008-03-07 2009-09-24 Toyota Motor Corp Internal flaw inspection method of piston
KR100955741B1 (en) * 2001-09-19 2010-04-30 페더럴-모걸 코오포레이숀 A piston for diesel engines
CN103423015A (en) * 2012-05-15 2013-12-04 安徽华菱汽车有限公司 Internal combustion engine and piston thereof
EP3502452A1 (en) * 2017-12-21 2019-06-26 MAN Truck & Bus AG Piston for a reciprocating piston combustion engine
CN110748434A (en) * 2019-11-29 2020-02-04 滨州渤海活塞有限公司 Steel piston of gasoline engine and manufacturing method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1427922A1 (en) * 2001-09-19 2004-06-16 Federal-Mogul Corporation Closed gallery piston having pin bore lubrication
EP1427922A4 (en) * 2001-09-19 2005-09-28 Federal Mogul Corp Closed gallery piston having pin bore lubrication
KR100955741B1 (en) * 2001-09-19 2010-04-30 페더럴-모걸 코오포레이숀 A piston for diesel engines
WO2008124807A1 (en) * 2007-04-10 2008-10-16 Federal-Mogul Corporation Piston with pin bore lubrication features
US7845269B2 (en) 2007-04-10 2010-12-07 Federal-Mogul Worldwide, Inc. Piston with pin bore lubrication features
JP2009216416A (en) * 2008-03-07 2009-09-24 Toyota Motor Corp Internal flaw inspection method of piston
CN103423015A (en) * 2012-05-15 2013-12-04 安徽华菱汽车有限公司 Internal combustion engine and piston thereof
EP3502452A1 (en) * 2017-12-21 2019-06-26 MAN Truck & Bus AG Piston for a reciprocating piston combustion engine
DE102017130962A1 (en) * 2017-12-21 2019-06-27 Man Truck & Bus Ag Piston for a reciprocating internal combustion engine
CN110748434A (en) * 2019-11-29 2020-02-04 滨州渤海活塞有限公司 Steel piston of gasoline engine and manufacturing method thereof

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