JPH01173364U - - Google Patents
Info
- Publication number
- JPH01173364U JPH01173364U JP6454188U JP6454188U JPH01173364U JP H01173364 U JPH01173364 U JP H01173364U JP 6454188 U JP6454188 U JP 6454188U JP 6454188 U JP6454188 U JP 6454188U JP H01173364 U JPH01173364 U JP H01173364U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- pad
- recess
- concave portion
- skirt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
第１図は本考案の一実施例に係る内燃機関用ピ
ストンの正面図、第２図は第１図の―線に沿
う縦断面図、第３図は第２図のピストンの拡大部
分断面図、第４図は凹部およびパツドの変形例を
示すピストンの部分縦断面図、第５図はピストン
摺動における一般的な摩擦係数の特性図、第６図
はオイルのくさび膜を示す第１図のピストンの拡
大部分断面図、第７図はオイルの流れ状態を示す
第１図のピストンの部分正面図、第８図は別の実
施例に係るピストンの部分縦断面図、第９図はさ
らに別の実施例に係るピストンの部分縦断面図、
である。
１，３１……ピストン、２……スカート部、３
……ピンボス、７，３２，４１……凹部、８……
スカート部摺動面、９，２１，３３，４２……パ
ツド、１０……パツド外縁部、１１……凹部内縁
部、１２……シリンダボア、２１ａ……頂面、２
１ｂ……傾斜面、４３……突起。
Fig. 1 is a front view of a piston for an internal combustion engine according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view taken along the line - - in Fig. 1, and Fig. 3 is an enlarged partial sectional view of the piston in Fig. 2. , Fig. 4 is a partial vertical sectional view of the piston showing a modified example of the recess and pad, Fig. 5 is a typical characteristic diagram of the coefficient of friction during piston sliding, and Fig. 6 is Fig. 1 showing the wedge film of oil. 7 is a partial front view of the piston of FIG. 1 showing the oil flow state, FIG. 8 is a partial longitudinal sectional view of the piston according to another embodiment, and FIG. 9 is a partial front view of the piston of FIG. A partial longitudinal sectional view of a piston according to another example,
It is. 1, 31...Piston, 2...Skirt part, 3
... Pin boss, 7, 32, 41 ... Recess, 8 ...
Skirt sliding surface, 9, 21, 33, 42... pad, 10... pad outer edge, 11... recess inner edge, 12... cylinder bore, 21a... top surface, 2
1b...slanted surface, 43... protrusion.
Claims (1)
るスカート部外周面に、上下および左右方向に閉
じた形状を有する凹部を設け、該凹部の中に、ピ
ストン径方向外方にスカート部摺動面よりは浅く
膨出する少なくとも一個のパツドを設け、前記凹
部の底部からパツドの頂面方向に延びるパツド外
縁部および凹部の底部からスカート部摺動面へと
連なる凹部内縁部を、ピストンの上下動に伴いオ
イルのくさび膜を形成可能な傾斜面に形成したこ
とを特徴とする内燃機関用ピストン。 A concave portion having a shape closed in the vertical and horizontal directions is provided on the outer peripheral surface of the skirt portion located in the thrust and anti-thrust directions of the piston, and a concave portion is provided in the concave portion outward in the radial direction of the piston and is shallower than the sliding surface of the skirt portion. At least one pad that bulges is provided, and an outer edge of the pad extending from the bottom of the recess toward the top surface of the pad and an inner edge of the recess extending from the bottom of the recess to the sliding surface of the skirt are coated with oil as the piston moves up and down. A piston for an internal combustion engine, characterized in that a wedge film is formed on an inclined surface on which a wedge film can be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988064541U JP2510103Y2 (en) | 1988-05-18 | 1988-05-18 | Piston for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988064541U JP2510103Y2 (en) | 1988-05-18 | 1988-05-18 | Piston for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01173364U true JPH01173364U (en) | 1989-12-08 |
| JP2510103Y2 JP2510103Y2 (en) | 1996-09-11 |
Family
ID=31290006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988064541U Expired - Lifetime JP2510103Y2 (en) | 1988-05-18 | 1988-05-18 | Piston for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2510103Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5080681U (en) * | 1973-11-30 | 1975-07-11 | ||
| JPS55156229U (en) * | 1979-04-25 | 1980-11-10 |
-
1988
- 1988-05-18 JP JP1988064541U patent/JP2510103Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5080681U (en) * | 1973-11-30 | 1975-07-11 | ||
| JPS55156229U (en) * | 1979-04-25 | 1980-11-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2510103Y2 (en) | 1996-09-11 |
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