JPH0454061B2 - - Google Patents
Info
- Publication number
- JPH0454061B2 JPH0454061B2 JP58138183A JP13818383A JPH0454061B2 JP H0454061 B2 JPH0454061 B2 JP H0454061B2 JP 58138183 A JP58138183 A JP 58138183A JP 13818383 A JP13818383 A JP 13818383A JP H0454061 B2 JPH0454061 B2 JP H0454061B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- oil reservoir
- oil
- top wall
- hole
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- 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
-
- 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
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
- F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
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)
Description
【発明の詳細な説明】
本発明は、内燃機関用ピストンに係り、特に油
噴射式ピストン冷却装置を備えた内燃機関に用い
られるピストンに係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston for an internal combustion engine, and particularly to a piston used in an internal combustion engine equipped with an oil injection type piston cooling device.
内燃機関に於て、機関潤滑油をクランク室より
カツプ状構造のピストンの内側空間へ向けて噴射
し、該潤滑油によりピストンの特に頂壁部を冷却
する油噴射式のピストン冷却装置は従来より良く
知られており、上述の如き油噴射式ピストン冷却
装置により頂壁部を効果的に冷却されるよう改良
されたピストンとして、頂壁部近傍に該頂壁部へ
向けて噴射された潤滑油を受止める油溜り部を有
するピツチが実願昭38−11185号（実公昭40−
19201号）、実願昭42−101852号（実公昭45−
32981号）、実願昭56−42967号（実開昭57−
156052号）或いはその他の出願によつて種々提案
されている。 In internal combustion engines, oil injection type piston cooling devices that inject engine lubricating oil from the crank chamber toward the inner space of the piston, which has a cup-shaped structure, and cool the piston, especially the top wall portion, with the lubricating oil have conventionally been used. As a piston that is well known and has been improved so that the top wall can be effectively cooled by the oil injection type piston cooling device as described above, lubricating oil is injected near the top wall toward the top wall. A pitcher with an oil sump that receives
19201), Jitsugan No. 101852 (Jikko 45-
32981), Utility Application No. 1984-42967 (Utility Application No. 1987-
156052) and other applications.
上述の如き油溜り部が鋳造或いは二つのピスト
ン構成部材の溶接により特別な構成部材を要する
ことなくピストンの頂壁部近傍に形成される場合
にあつては製作性及び製品品質性に欠け、製作費
が嵩むという不具合がある。このためピストンの
内側空間に設けられてねじによりピストンに固定
接続された棚板部材により頂壁部の側に油溜り部
を郭定されたピストン、或いはピストンの内側空
間に設けられてばねのばね力によつてピストンに
固定接続された棚板部材により頂壁部の側に油溜
り部を郭定されたピストンが上述の如き実用新案
登録出願によつて既に提案されている。 In cases where the oil reservoir as described above is formed near the top wall of the piston by casting or welding two piston components together without requiring any special components, manufacturability and product quality are poor and manufacturing is difficult. The problem is that costs are high. For this purpose, a piston with an oil reservoir defined on the top wall side by a shelf member provided in the inner space of the piston and fixedly connected to the piston with a screw, or a spring provided in the inner space of the piston with an oil reservoir defined on the top wall side. A piston in which an oil reservoir is defined on the top wall side by a shelf member fixedly connected to the piston by force has already been proposed in the above-mentioned utility model application.
しかし、ねじによつて棚板部材を取付けられた
ピストンに於ては、ねじの弛みによつて棚板部材
が脱落する虞れがあり、またばねのばね力によつ
て棚板部材を取付けられたピストンに於ては、そ
の取付構造が比較的複雑なものになり且取付信頼
性に欠けるという欠点がある。 However, in a piston to which a shelf board member is attached with screws, there is a risk that the shelf board member may fall off due to loosening of the screws, and the shelf board member may not be attached due to the spring force of the spring. However, such a piston has the disadvantage that its mounting structure is relatively complicated and its mounting reliability is lacking.
本発明は、簡単な構造により棚板部材、即ち油
溜り構成部材を容易にしかも確実に取付けること
ができ、油溜り構成部材が脱落する虞れがない内
燃機関用ピストンを提供することを目的としてい
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide a piston for an internal combustion engine that has a simple structure and allows a shelf plate member, that is, an oil sump component, to be easily and reliably attached, and there is no risk of the oil sump component falling off. There is.
かかる目的は、本発明によれば、一端部に頂壁
部を有するカツプ状のピストン本体と、前記ピス
トン本体の内側空間に設けられた油溜り構成部材
とを有し、前記油溜り構成部材がピストンの半径
方向に延在する棚板部及び前記棚板部に固定連結
されたピストンの長さ方向に前記頂壁部と反対の
側へ延在しピストンピン孔に整合する一対の貫通
孔を有する脚片部からなり、前記棚板部は外周縁
にて前記ピストン本体の内周壁に係合し前記頂壁
部の側に油溜り部を郭定し、前記脚片部は前記貫
通孔の周縁部にて前記ピストン本体の前記ピスト
ンピン孔の周縁部と一方の突条が他方の窪み内に
嵌入する嵌込み係合にて取付けられ、ピストンピ
ンが前記ピストンピン孔及び前記貫通孔を貫通し
て延在し、前記ピストン本体と前記油溜り構成部
材の少なくとも一方が前記油溜り部へ油を供給す
る油供給通路と前記油溜り部より油を排出する油
排出通路とを有していることを特徴とする内燃機
関用ピストンによつて達成される。 According to the present invention, the present invention includes a cup-shaped piston body having a top wall portion at one end, and an oil reservoir constituent member provided in an inner space of the piston body, and the oil reservoir constituent member is provided in an inner space of the piston body. A shelf section extending in the radial direction of the piston, and a pair of through holes fixedly connected to the shelf section and extending in the longitudinal direction of the piston to a side opposite to the top wall section and aligned with the piston pin hole. The shelf plate portion engages with the inner circumferential wall of the piston body at its outer peripheral edge to define an oil reservoir on the side of the top wall portion, and the leg portion engages with the inner circumferential wall of the piston body at its outer peripheral edge, and the leg portion engages with the inner circumferential wall of the piston body at the outer peripheral edge thereof, and defines an oil reservoir portion on the side of the top wall portion. The peripheral edge of the piston pin hole of the piston body is attached to the peripheral edge of the piston pin hole by fitting engagement in which one protrusion fits into the other recess, and the piston pin passes through the piston pin hole and the through hole. At least one of the piston body and the oil reservoir component has an oil supply passage that supplies oil to the oil reservoir and an oil discharge passage that discharges oil from the oil reservoir. This is achieved by a piston for an internal combustion engine characterized by the following.
上述の如く本発明による内燃機関用ピストンに
於ては、油溜り構成部材をカツプ状ピストン本体
の内部へ挿入し、油溜り構成部材の棚板部をピス
トン本体の内周壁に係合させ、脚片部を一時的に
弾性変形させてその貫通孔の周縁部をピストン本
体のピストンピン孔の周縁部と一方の突条が他方
の窪み内に嵌入する嵌込み係合にて結合させれ
ば、それだけで油溜り構成部材はピストン本体に
対し所定の位置に位置決めされた状態に取付けら
れ、ピストン本体によつて確実に支持される。更
に、ピストンピン孔と貫通孔とを通つてピストン
ピンが通されるので、ピストン本体に対する油溜
り構成部材の取付けは、前記嵌込み式係合の一時
的離脱の如何に拘らず確実に保持される。 As described above, in the piston for an internal combustion engine according to the present invention, the oil reservoir component is inserted into the cup-shaped piston body, the shelf plate portion of the oil reservoir component is engaged with the inner circumferential wall of the piston body, and the leg If the piece is temporarily elastically deformed and the peripheral edge of the through hole is connected to the peripheral edge of the piston pin hole of the piston body through a fitting engagement in which one of the protrusions fits into the recess of the other, This alone allows the oil reservoir component to be mounted in a predetermined position relative to the piston body, and is securely supported by the piston body. Furthermore, since the piston pin is passed through the piston pin hole and the through hole, the attachment of the oil reservoir component to the piston body is reliably maintained regardless of whether or not the snap-in engagement is temporarily disengaged. Ru.
以下に添付の図を参照して本発明の実施例につ
いて詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
第１図乃至第４図は本発明による内燃機関用ピ
ストンの一つの実施例を示している。本発明によ
る内燃機関用ピストンは、ピストン本体１と油溜
り構成部材１０とにより構成されている。 1 to 4 show one embodiment of a piston for an internal combustion engine according to the present invention. The piston for an internal combustion engine according to the present invention is composed of a piston body 1 and an oil reservoir forming member 10.
ピストン本体１は円筒状の側周壁２と該側周壁
の一端に該一端を閉塞して設けられた頂壁部３と
を有するカツプ状に鋳造によつて形成されてい
る。側周壁２の内側には一対のボス部４が膨出形
成されており、該一対のボス部４２には互いに同
一の軸線上にピストンピン孔５が設けられてい
る。ピストンピン孔５にはピストンと図示されて
いないコネクテイングロツドとの連結を行うピス
トンピン６が挿入されている。 The piston body 1 is formed by casting into a cup shape having a cylindrical side circumferential wall 2 and a top wall portion 3 provided at one end of the side circumferential wall with the one end closed. A pair of boss portions 4 are formed to bulge inside the side peripheral wall 2, and a piston pin hole 5 is provided in the pair of boss portions 42 on the same axis. A piston pin 6 is inserted into the piston pin hole 5 to connect the piston to a connecting rod (not shown).
油溜り構成部材１０は、ピストン軸線に直交す
る仮想平面に沿つて延在し外周縁１１ａにてピス
トン本体１の内周壁に接合係合し頂壁部３の側に
油溜り部Ａを郭定する棚板部１１と、棚板部１１
の外周縁の一部より頂壁部３とは反対の側に折曲
形成された一対の脚片部１２とを互いに一体に有
している。脚片部１２には、第４図に良く示され
ている如く、ピストンピン６が貫通する貫通孔１
３と該貫通孔の周縁部に突出形成された円環状突
条１４とが設けられている。円環状突条１４はピ
ストン本体１のピストンピン孔５の内側開口端の
周りに設けられた拡径部７に嵌合係合するように
なつている。 The oil reservoir component 10 extends along a virtual plane orthogonal to the piston axis, and engages with the inner peripheral wall of the piston body 1 at the outer peripheral edge 11a, defining an oil reservoir portion A on the top wall portion 3 side. Shelf board part 11 and shelf board part 11
A pair of leg portions 12 are formed integrally with each other and are formed by bending a portion of the outer peripheral edge of the leg portion 12 toward the side opposite to the top wall portion 3 . As clearly shown in FIG. 4, the leg portion 12 has a through hole 1 through which the piston pin 6 passes.
3 and an annular protrusion 14 protruding from the peripheral edge of the through hole. The annular protrusion 14 is adapted to fit into an enlarged diameter portion 7 provided around the inner open end of the piston pin hole 5 of the piston body 1 .
尚、油溜り構成部材１０は金属板をプレス加工
されたものにより構成されていて良い。 Incidentally, the oil reservoir forming member 10 may be formed by pressing a metal plate.
油溜り構成部材１０は円環状突条１４がピスト
ン本体１の拡径部７に嵌込み式に係合することに
よつてピストン本体１に支持される。更に、貫通
孔１３にピストンピン６が貫通しているために、
万一強い衝撃等により円環状突起１４と拡径部７
との嵌合がはずれたとしても油溜り構成部材は脱
落することなく装着状態を維持することを保証さ
れる。また、油溜り構成部材１０は、棚板部１１
の外周縁１１ａがその全周に亙つてピストン本体
１の内周壁に接合することによりピストン本体１
の内側空間内に安定姿勢にて配設され、棚板部１
１の頂壁部３の側に上述の如き油溜り部Ａを郭定
する。 The oil reservoir component 10 is supported by the piston body 1 by the annular protrusion 14 fittingly engaged with the enlarged diameter portion 7 of the piston body 1 . Furthermore, since the piston pin 6 passes through the through hole 13,
In the unlikely event that a strong impact or the like occurs, the annular protrusion 14 and the enlarged diameter portion 7
Even if the fitting with the oil reservoir member is disengaged, it is guaranteed that the oil reservoir component will not fall off and will maintain its attached state. In addition, the oil reservoir component 10 includes a shelf section 11
The outer circumferential edge 11a of the piston body 1 is joined to the inner circumferential wall of the piston body 1 over its entire circumference.
It is arranged in a stable position in the inner space of the shelf part 1.
An oil reservoir A as described above is defined on the side of the top wall 3 of No. 1.
棚板部１１には、第３図に良く示されている如
く、内燃機関のシリンダブロツクに設けられた燃
料噴射ノズルＮ（第１図参照）より頂壁部３へ向
けて噴射された潤滑油を油溜り部Ａ内に導入する
潤滑油供給孔１５と油溜り部Ａ内に導入された潤
滑油を油溜り部Ａ外へ排出する潤滑油排出孔１６
とが互いに隔置して設けられている。 As clearly shown in FIG. 3, on the shelf section 11, lubricating oil is injected toward the top wall section 3 from a fuel injection nozzle N (see FIG. 1) provided in the cylinder block of the internal combustion engine. A lubricating oil supply hole 15 that introduces lubricating oil into the oil sump A and a lubricating oil discharge hole 16 that discharges the lubricating oil introduced into the oil sump A to the outside of the oil sump A.
are spaced apart from each other.
尚、潤滑油供給孔１５と潤滑油排出孔１６とは
ピストン本体に設けられていても良い。 Note that the lubricating oil supply hole 15 and the lubricating oil discharge hole 16 may be provided in the piston body.
棚板部１１上に溜まつた潤滑油は、ピストンが
上死点位置より下死点位置へ移動する際に、即ち
膨張行程移動時に慣性によつて頂壁部３へ向けて
跳上り、該頂壁部の裏面に付着することにより頂
壁部３の冷却を行う。この場合、頂壁部３の裏面
に付着した潤滑油が前記裏面に付着してその全面
に亙つて一様に流れるべく頂壁部３の裏面側の形
状は、第１図及び第２図に示されている如く、ピ
ストンの中心軸線を中心軸線とする円錐形或いは
部分球形に形成されていることが好ましい。 When the piston moves from the top dead center position to the bottom dead center position, that is, during the expansion stroke, the lubricating oil accumulated on the shelf plate part 11 jumps toward the top wall part 3 due to inertia. The top wall portion 3 is cooled by adhering to the back surface of the top wall portion. In this case, the shape of the back side of the top wall 3 is as shown in Figs. As shown, it is preferably formed into a conical or partially spherical shape with the central axis of the piston as the central axis.
以上に於ては、本発明を特定の実施例について
詳細に説明したが、本発明は上述の実施例に限ら
れるものではなく、本発明の範囲内にて他の種々
の実施例が可能であることは当業者にとつて明ら
かであろう。 Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to the above-mentioned embodiments, and various other embodiments are possible within the scope of the present invention. This will be obvious to those skilled in the art.
第１図は本発明による内燃機関用ピストンの一
つの実施例を示す縦断面図、第２図は第１図の線
−に沿う断面図、第３図は第１図に示された
ピストンの底面図、第４図は第１図乃至第３図に
示されたピストンの要部を拡大して示す部分的な
縦断面図である。
１……ピストン本体、２……側周壁、３……頂
壁部、４……ボス部、５……ピストンピン孔、６
……ピストンピン、７……拡径部、１０……油溜
り構成部材、１１……棚板部、１２……脚片部、
１３……貫通孔、１４……円環状突条、１５……
潤滑油供給孔、１６……潤滑油排出孔、Ａ……油
溜り部、Ｎ……潤滑油噴射ノズル。
1 is a longitudinal sectional view showing one embodiment of a piston for an internal combustion engine according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a sectional view of the piston shown in FIG. The bottom view and FIG. 4 are partial longitudinal sectional views showing enlarged main parts of the piston shown in FIGS. 1 to 3. DESCRIPTION OF SYMBOLS 1...Piston body, 2...Side peripheral wall, 3...Top wall part, 4...Boss part, 5...Piston pin hole, 6
... Piston pin, 7 ... Expanded diameter part, 10 ... Oil reservoir component, 11 ... Shelf board part, 12 ... Leg piece part,
13... Through hole, 14... Annular protrusion, 15...
Lubricating oil supply hole, 16... Lubricating oil discharge hole, A... Oil reservoir, N... Lubricating oil injection nozzle.
Claims (1)
本体と、前記ピストン本体の内側空間に設けられ
た油溜り構成部材とを有し、前記油溜り構成部材
がピストンの半径方向に延在する棚板部と前記棚
板部に固定連結されピストンの長さ方向に前記頂
壁部と反対の側へ延在しピストンピン孔を整合す
る一対の貫通孔を有する脚片部とからなり、前記
棚板部は外周縁にて前記ピストン本体の内周壁に
係合し前記頂壁部の側に油溜り部を郭定し、前記
脚片部は前記貫通孔の周縁部にて前記ピストン本
体の前記ピストンピン孔の周縁部と一方の突条が
他方の窪み内に嵌入する嵌込み係合にて取付けら
れ、ピストンピンが前記ピストンピン孔及び前記
貫通孔を貫通して延在し、前記ピストン本体と前
記油溜り構成部材の少なくとも一方が前記油溜り
部へ油を供給する油供給通路と前記油溜り部より
油を排出する油排出通路とを有していることを特
徴とする内燃機関用ピストン。1 A shelf comprising a cup-shaped piston body having a top wall at one end and an oil reservoir component provided in an inner space of the piston body, the oil reservoir component extending in the radial direction of the piston. The shelf includes a plate part and a leg part fixedly connected to the shelf part and having a pair of through holes extending in the length direction of the piston to the side opposite to the top wall part and aligning the piston pin holes, The plate part engages with the inner peripheral wall of the piston body at the outer peripheral edge and defines an oil reservoir on the side of the top wall part, and the leg part engages with the inner peripheral wall of the piston main body at the peripheral edge of the through hole. The peripheral edge of the piston pin hole and one protrusion are fitted into the recess of the other by fitting engagement, the piston pin extends through the piston pin hole and the through hole, and the piston main body and a piston for an internal combustion engine, wherein at least one of the oil reservoir constituent members has an oil supply passage that supplies oil to the oil reservoir and an oil discharge passage that discharges oil from the oil reservoir. .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13818383A JPS6030456A (en) | 1983-07-28 | 1983-07-28 | Piston for internal-combustion engine |
| US06/623,932 US4506632A (en) | 1983-07-28 | 1984-06-25 | Piston assembly with cooling lubricant reservoir defining member engaged to piston pin mounting bosses |
| DE19843423889 DE3423889A1 (en) | 1983-07-28 | 1984-06-28 | PISTON UNIT WITH LUBRICANT STORAGE AND ELEMENT WITH PISTON PIN MOUNTING EYES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13818383A JPS6030456A (en) | 1983-07-28 | 1983-07-28 | Piston for internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6030456A JPS6030456A (en) | 1985-02-16 |
| JPH0454061B2 true JPH0454061B2 (en) | 1992-08-28 |
Family
ID=15215994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13818383A Granted JPS6030456A (en) | 1983-07-28 | 1983-07-28 | Piston for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6030456A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4801067A (en) * | 1986-08-29 | 1989-01-31 | Ngk Spark Plug Co., Ltd. | Method of connecting metal conductor to ceramic substrate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5892440U (en) * | 1981-12-17 | 1983-06-22 | トヨタ自動車株式会社 | Internal combustion engine piston cooling system |
| JPS5896037U (en) * | 1981-12-23 | 1983-06-29 | トヨタ自動車株式会社 | Internal combustion engine piston cooling system |
| JPS58102708U (en) * | 1981-12-29 | 1983-07-13 | いすゞ自動車株式会社 | Diesel engine piston cooling system |
-
1983
- 1983-07-28 JP JP13818383A patent/JPS6030456A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6030456A (en) | 1985-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4506632A (en) | Piston assembly with cooling lubricant reservoir defining member engaged to piston pin mounting bosses | |
| US4984971A (en) | Anti-vibratory device to attach a hermetic compresser chamber to its base | |
| CN201546796U (en) | Piston cooling device | |
| US7520256B2 (en) | Fastening structure for cylinder head and divided type cylinder block of engine | |
| JPS60153453A (en) | Piston for internal-combustion engine | |
| JPH0454061B2 (en) | ||
| US4825823A (en) | Self-adjusting hydraulic valve tappet | |
| JP4716775B2 (en) | Oil jet for piston cooling | |
| US6763794B1 (en) | Vibration sound reducing device, and process for assembling elastic membrane in vibration sound reducing device | |
| JPH0324860Y2 (en) | ||
| JPH0322536Y2 (en) | ||
| JPH0643246U (en) | Connection structure of piston and connecting rod | |
| US6715457B1 (en) | Piston assembly | |
| JPH0324859Y2 (en) | ||
| JPH048288Y2 (en) | ||
| JP6235820B2 (en) | Mounting structure and assembly method for resin molded products | |
| JPH0134685Y2 (en) | ||
| US6003483A (en) | Yoke mount rocker arm | |
| JPH0535266B2 (en) | ||
| JPH0322534Y2 (en) | ||
| KR200153439Y1 (en) | Oil cap | |
| JPS6146248Y2 (en) | ||
| JPH0324861Y2 (en) | ||
| JP2008286288A (en) | Piston structure and engine | |
| JPH0763029A (en) | Cam lubrication device for internal combustion engine |