JPS585455A - Piston - Google Patents
PistonInfo
- Publication number
- JPS585455A JPS585455A JP10164581A JP10164581A JPS585455A JP S585455 A JPS585455 A JP S585455A JP 10164581 A JP10164581 A JP 10164581A JP 10164581 A JP10164581 A JP 10164581A JP S585455 A JPS585455 A JP S585455A
- Authority
- JP
- Japan
- Prior art keywords
- cooling oil
- oil passage
- cooling
- piston
- wall
- 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
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
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
Description
【発明の詳細な説明】
この発明はピストンに関し、特に詳述すれば、冷却油通
路を備えるピストンに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston, and more particularly to a piston provided with a cooling oil passage.
ディーゼルエンジンに用いられる深鉢臘ピストンは、ピ
ストンクラウンに設けた深林型燃焼部がエンジンの燃焼
室に強い複渦流を作シ燃料効率が高く、シかも、ピスト
ンクラウンとコンロッドのためのビンとを近接させ、ピ
ストンを小型化し得るのでピストンの軽量化に効果的で
ある。このような利点を有する深鉢厘ピストンは、しか
し麦から、燃焼室内の高温にさらされるピストンクラウ
ン部の溶解或いは熱疲労破壊、ビンボス部の熱による焼
付および軸受効果の低下現象等がみられ、耐久性および
信頼性に問題を残し、ピストンの寿命も短い。The deep-bottomed piston used in diesel engines has a deep-shaped combustion section installed in the piston crown that creates a strong double vortex flow in the combustion chamber of the engine, resulting in high fuel efficiency. Since the pistons can be placed close to each other and the pistons can be made smaller, it is effective in reducing the weight of the pistons. However, deep bowl pistons have such advantages, but due to wheat, melting or thermal fatigue failure of the piston crown exposed to high temperatures in the combustion chamber, seizure of the piston boss due to heat, and deterioration of bearing effectiveness are observed. There remain problems with durability and reliability, and the life of the piston is short.
仁の発明は、このような従来の深鉢聾のピストンの不具
合を解消させることを意図したもので、冷却油通路をピ
ストン内に設け、効果的な冷却を可能にし、耐久性およ
び信頼性を高め、ピストン寿命を延長させているピスト
ンを提供することを目的とする。Jin's invention was intended to eliminate these problems with conventional deep-bottomed pistons, and by providing a cooling oil passage inside the piston, it enabled effective cooling and improved durability and reliability. The purpose of the present invention is to provide a piston with improved piston life.
この発明の実施例を添付図面を参照して説明する。Embodiments of the invention will be described with reference to the accompanying drawings.
第１〜４図を参照してこの発明に↓６ピストン１０例を
説明する。ピストン１のピストンクラウン２にトロイダ
ル形の深林燃焼部３を形成し、深林燃焼部３の底！４に
近接しその下方に対の向い合うビンボス５を形成する。Ten examples of ↓6 pistons according to the present invention will be explained with reference to FIGS. 1 to 4. A toroidal-shaped Shinbayashi combustion part 3 is formed on the piston crown 2 of the piston 1, and the bottom of the Shinbayashi combustion part 3! A pair of opposing bin bosses 5 are formed adjacent to and below the bin bosses 4.
深林燃焼部３の底壁４は、リングランド６の内周ｌ！Ｔ
へと円弧状に延出する横壁８を有し、この横壁８と、深
林燃焼部３の周壁９およびリングランド６の内周１１ｉ
１０とによシ、深林燃焼部３を囲む環状の第１の冷却油
通路１１を構成する。一方、対のピンボス５から、深林
燃焼部３の底１１４又は横壁８に連結するリブ１２を延
出させ、リプ１２と、横壁８およびピンボス５の上壁面
１３とによって構成される第２の冷却油通路１４を作る
。第２の冷却油通路１４は、第３図でみて、その左右に
開口する。第１の冷却油通路１１と第２の冷却油通路１
４とは、ビンボス直上の横壁８に穿は九出口１５を介し
て連通し、第１の冷却油通路１１内の冷却油は出口１５
を通って第２の冷却油通路１４に流出し、ピンボス５の
上壁面１３を冷却し愈がら、左右の開口部（第３図参照
）からビンボス５０周壁に沿って流れ、ピンボス５を冷
却しクランク室（図なし）にもどる。出口１５のまわシ
には上向きの仕切板１６を形成し、第１の冷却油通路１
１内の冷却油が過度に第２の冷却油通路１４に流出する
のを防止する。仕切板１６は円筒つ
状を表しその頂部と横Ｉｉ８とへ間に、常時、冷却油を
貯えるようにする。The bottom wall 4 of the Fukabayashi combustion section 3 is the inner circumference l of the ring land 6! T
It has a horizontal wall 8 extending in an arc shape to
10 and constitutes an annular first cooling oil passage 11 surrounding the Fukabayashi combustion section 3. On the other hand, a rib 12 that connects to the bottom 114 or the side wall 8 of the Fukabayashi combustion section 3 is extended from the pair of pin bosses 5, and a second cooling device is formed by the lip 12, the side wall 8, and the upper wall surface 13 of the pin boss 5. Create an oil passage 14. The second cooling oil passage 14 opens on the left and right sides as seen in FIG. First cooling oil passage 11 and second cooling oil passage 1
4 means that the hole in the horizontal wall 8 directly above the bottle boss communicates through nine outlets 15, and the cooling oil in the first cooling oil passage 11 is connected to the outlet 15.
The cooling oil flows through the second cooling oil passage 14 to cool the upper wall surface 13 of the pin boss 5, and flows along the circumferential wall of the bottle boss 50 from the left and right openings (see FIG. 3) to cool the pin boss 5. Return to the crank chamber (not shown). An upward partition plate 16 is formed around the outlet 15, and the first cooling oil passage 1
The cooling oil in the cooling oil passage 1 is prevented from excessively flowing out into the second cooling oil passage 14. The partition plate 16 has a cylindrical shape, and cooling oil is always stored between the top and the side Ii8.
横１１８に、クランク室側からの冷却油ジェット流を受
けてこれを第１の冷却油通路１１に供給するためのジェ
ット流入口１Ｔを穿ける。ジェット流入口１Ｔの穿けら
れた横壁８の下面に径方向下方に傾斜面を有する肉盛夛
部１８を形成する（第３および第４図参照）。A jet inlet 1T is provided on the side 118 for receiving the cooling oil jet flow from the crank chamber side and supplying it to the first cooling oil passage 11. A built-up part 18 having a radially downwardly inclined surface is formed on the lower surface of the horizontal wall 8 in which the jet inlet 1T is bored (see FIGS. 3 and 4).
クランク室（図なし）から斜め上向きに冷却油をジェッ
ト流として噴出させ、＋ジェット流÷入口１Ｔを介して
第１の冷却油通路１１に該冷却油を供給するが、ピスト
ン１０ストロークに応じてクランク室側からの冷却油ジ
ェット流がジェット流入口１Ｔから逸れたとき、冷却油
のジェット流は、この肉盛シ部１８に衝突する。肉盛シ
部１８の下面け、径方向及び周方向に沿って傾斜してい
るので、咳肉盛シ部１８に衝突した冷却油ジェット流に
、該肉感シ部の傾斜壁面に沿う成分が生じ、深林燃焼部
３の底１１４に冷却油がまわシ、底壁４を効果的に冷却
する。さらに、肉盛り部１８に衡突した冷却ジェット流
の一部が飛散し、ビン１１１とコンロッド２０との結合
部に冷却油を供給するので、この部分の冷却、潤滑が可
能となる。Cooling oil is ejected diagonally upward from the crank chamber (not shown) as a jet flow, and is supplied to the first cooling oil passage 11 via + jet flow ÷ inlet 1T. When the cooling oil jet flow from the crank chamber side deviates from the jet inlet 1T, the cooling oil jet flow collides with this built-up portion 18. Since the lower surface of the built-up part 18 is inclined along the radial and circumferential directions, the cooling oil jet flow that collides with the built-up part 18 has a component along the inclined wall surface of the built-up part 18. , the cooling oil is applied to the bottom 114 of the Shenbayashi combustion section 3, effectively cooling the bottom wall 4. Further, a portion of the cooling jet flow that hits the built-up portion 18 scatters and supplies cooling oil to the joint between the bottle 111 and the connecting rod 20, thereby making it possible to cool and lubricate this portion.
ピンボス５の上壁面１３に孔２１を穿け、第２の冷却油
通路１４とビンボス５のピン軸受部とを連通させ、第２
の冷却油通路１１内の冷却油がピンボス５の軸受部に流
れ、ビン１９とビンボス軸受部の冷却および潤滑を行な
う。淘、ジェット流入口１Ｔとは対向する側に別の出１
口２２を設け、第１の冷却油通路１１内の冷却油のクラ
ンク室（図なし）への奄どりを早め、冷却油の循環作用
を早めてもよい。又、図示しないが、底１１４に下向き
の環状突片を設け、底壁４の剛性および放熱効果を高め
、さらに、底壁４の下面に沿う冷却油の流れの案内とさ
せ得る。A hole 21 is bored in the upper wall surface 13 of the pin boss 5, and the second cooling oil passage 14 and the pin bearing part of the pin boss 5 are made to communicate with each other.
The cooling oil in the cooling oil passage 11 flows to the bearing portion of the pin boss 5 to cool and lubricate the bottle 19 and the bottle boss bearing portion. There is another outlet 1 on the side opposite to the jet inlet 1T.
A port 22 may be provided to speed up the flow of the cooling oil in the first cooling oil passage 11 into the crank chamber (not shown), thereby speeding up the circulation of the cooling oil. Although not shown, a downward annular protrusion may be provided on the bottom 114 to enhance the rigidity and heat dissipation effect of the bottom wall 4 and to guide the flow of cooling oil along the lower surface of the bottom wall 4.
第５および第６図を参照して冷却油の流れを説明する。The flow of cooling oil will be explained with reference to FIGS. 5 and 6.
冷却油はクランク室（図なし）側からポンプを用い、上
向きのジェン）６１１．として供給される。上向きの冷
却油ジェット流２３は、ピストン１０横壁８に向い斜め
上方へと噴出する。このため、ピストン１０ストローク
中の成る位置において、冷却油ジェット流２３と第１の
冷却油通路１１のジェット流入口１７とが合致し、冷却
油ジェット流２３は入口１Ｔを介して第１の冷却油通路
１１内へと噴流する。第１の冷却油通路１１内に入うた
冷却油は深林燃焼部３の周壁９およびリングランド６を
冷却し、出口１５から第２の冷却油通路１４に入り、ピ
ンボス５の上壁面１３を冷却しながら両サイドからピン
ボス周壁に沿って流れピンボス５の全体を冷却させる。Use a pump to pump cooling oil from the crank chamber (not shown) side, and pump it upward (611. Supplied as. The upward cooling oil jet stream 23 is directed toward the side wall 8 of the piston 10 and is ejected obliquely upward. Therefore, at a position during the 10 strokes of the piston, the cooling oil jet flow 23 and the jet inlet 17 of the first cooling oil passage 11 match, and the cooling oil jet flow 23 passes through the inlet 1T to the first cooling oil passage 11. The oil is jetted into the oil passage 11. The cooling oil that has entered the first cooling oil passage 11 cools the peripheral wall 9 and ring land 6 of the Fukabayashi combustion section 3, enters the second cooling oil passage 14 from the outlet 15, and cools the upper wall surface 13 of the pin boss 5. At the same time, the flow flows along the pin boss peripheral wall from both sides and cools the entire pin boss 5.
さらに１第２の冷却油通路１４の冷却油は孔２１を通っ
てピンボス軸受部を冷却、潤滑させる。第１の冷却油通
路１１の出口１５まわりの仕切板１６は該通路１１内の
冷却油の過度な流出を防ぎ、最低量の冷却油を常に第１
の冷却油通路１１内にとどめ、ピストン１のビストンク
２ウン２およびリングランド６等の熱疲労による破壊や
熱溶解な防止する。Furthermore, the cooling oil in the first and second cooling oil passages 14 passes through the holes 21 to cool and lubricate the pin boss bearing portion. A partition plate 16 around the outlet 15 of the first cooling oil passage 11 prevents excessive leakage of the cooling oil in the passage 11 and always keeps a minimum amount of cooling oil in the first cooling oil passage 11.
The cooling oil is kept within the cooling oil passage 11 to prevent the piston 1's piston 1, piston 1, piston 2, ring land 6, etc. from being destroyed or melted due to thermal fatigue.
ピストン１の動きに％じ、斜め上方へと向う冷却油ジェ
ット流２３は、ジェット流入口１Ｔへの流入からずれて
、横ａＳの肉盛り部１８に衝突し、その一部が飛散し、
ピン１９およびコンロッド２ｏそれ自身およびそれらの
連結部を冷却、潤滑させ、又、肉盛り部１８の傾斜面の
ため冷却油ジェット流２３の一部に横方向の成分が生じ
、深林燃焼部３の底壁４の下面に沿って冷却油が流れ、
底壁４および横壁８を冷却させる。According to the movement of the piston 1, the cooling oil jet flow 23 that heads diagonally upward deviates from the inflow into the jet inlet 1T and collides with the built-up portion 18 of the side aS, and a part of it is scattered.
It cools and lubricates the pin 19 and the connecting rod 2o themselves and their connecting parts, and because of the inclined surface of the built-up part 18, a lateral component is generated in a part of the cooling oil jet flow 23, which causes the cooling oil jet flow 23 to have a lateral component. Cooling oil flows along the lower surface of the bottom wall 4,
The bottom wall 4 and side walls 8 are cooled.
ピストン１の上下動によシ前述の冷却作用が繰シ返され
ることになる。The above-mentioned cooling action is repeated by the vertical movement of the piston 1.
以上から明らか表ように、この発明で杜、深林燃焼部と
リングランドとの間に横壁を設けて第１の冷却油通路を
構成しているので、ピスト／クラウン、リングランドお
よび深林燃焼部の周鐘の冷却を常に効果的に達成可能と
なシ、これらの部讐疲労を防き゛又熱溶解を防止できる
。第１の冷却油通路は横壁に穿は九出口を介してピンボ
スの上方の第２の冷却油通路と通じているので第１の冷
却油通路から出口を介して流出した冷却油は第２の冷却
油通路内に入シビンボスの上壁面を冷却しながらその両
サイドから流れ出てピンボス周壁を冷却させる。このた
め、ピンボス軸受部の冷却が確実となりピンの焼付は現
象はない、冷却油はジェット流としてピストンの下方か
ら斜め上向きに噴流させ第１の冷却油通路の入口へ供給
されるが、ピストンのストロークに応じて、冷却油ジェ
ット流は入口から外れ横壁の肉盛シ部に衝突し飛散し、
ピン、コンロッドおよびそれらの連結部を冷却し、同時
に１その一部が肉盛り部の傾斜壁にょシ深鉢燃焼部の底
壁の下面に沿って流れ、深林燃焼部を効果的に冷却する
。かくして、この発明によるピストンは高温を受ける部
分が常に冷却されるので耐久性および信頼性を向上させ
、その寿命も！ｇ長させ得る。As is clear from the above, in this invention, the first cooling oil passage is constructed by providing a horizontal wall between the forest, the ring land, and the ring land. By being able to effectively cool the bell at all times, fatigue of these parts can be prevented and thermal melting can be prevented. The first cooling oil passage is bored in the side wall and communicates with the second cooling oil passage above the pin boss through nine outlets, so that the cooling oil flowing out from the first cooling oil passage through the outlet is transferred to the second cooling oil passage. The cooling oil enters the passage and cools the upper wall surface of the shibin boss, while flowing out from both sides to cool the peripheral wall of the pin boss. For this reason, the cooling of the pin boss bearing part is ensured and there is no phenomenon of pin seizure.The cooling oil is jetted diagonally upward from below the piston and is supplied to the entrance of the first cooling oil passage. Depending on the stroke, the cooling oil jet flow leaves the inlet and collides with the built-up part of the side wall and scatters.
The pin, the connecting rod, and their connecting parts are cooled, and at the same time, a part of the pin flows along the inclined wall of the built-up part and the lower surface of the bottom wall of the deep-bowl combustion part, effectively cooling the deep-bowl combustion part. Thus, the piston according to the invention improves durability and reliability, as the parts exposed to high temperatures are constantly cooled, and also extends its lifespan! g can be made longer.
第１図はこの発明によるピストンの例の底面図、第２図
は第１図の矢視■−■よシみた断面図、第３図は第１図
の矢視■−■よシみた断面図、第４図は一部１図の矢視
ＩＶ−■よシみ九断面図、第５図は冷却油ジェット流と
入口との関係を示すピストンの部分破断正面図、および
第６図は冷却油ジェット流と肉盛シ部との関係を示すピ
ストンの部分破断正面図である。
図中：１・・パピストン、２・・・ピストンクラウン、
３・・・深林燃焼部、４・・・底壁、５・・・ピンボス
、６・・・リングランド、８・・・横壁、１１・・・第
１の冷却油通路、１２・・・リブ、１４・・・第２の冷
却油通路、１５・・・出口、１６・・・仕切板、１７・
・・ジェット流入口、１８・・・肉盛シ部。
代理人 弁理士 桑 原 英 明Fig. 1 is a bottom view of an example of a piston according to the present invention, Fig. 2 is a cross-sectional view taken along arrows - - - in Fig. 1, and Fig. 3 is a cross-sectional view taken along arrows - - - in Fig. 1. Figure 4 is a cross-sectional view taken along arrow IV-■ in Figure 1, Figure 5 is a partially cutaway front view of the piston showing the relationship between the cooling oil jet flow and the inlet, and Figure 6 is a partially cutaway front view of the piston showing the relationship between the cooling oil jet flow and the inlet. FIG. 3 is a partially cutaway front view of the piston showing the relationship between the cooling oil jet flow and the built-up portion. In the diagram: 1...Papiston, 2...Piston crown,
3... Deep forest combustion part, 4... Bottom wall, 5... Pin boss, 6... Ring land, 8... Side wall, 11... First cooling oil passage, 12... Rib , 14... Second cooling oil passage, 15... Outlet, 16... Partition plate, 17...
... Jet inlet, 18... Overlay part. Agent Patent Attorney Hideaki Kuwahara
Claims (3)
壁からリングランド内周壁へと延在する横壁により画定
される第１の冷却油通路と、ビンボスの上壁面と前記底
壁又は横壁とを連結させるリブによシ画定され且つビン
ボス上方の前記横壁に穿けた出口によシ前記第１の冷却
油通路と連通関係の第２の冷却油通路と、前記横壁に穿
けられ且つ前記第１の冷却油通路と通じていてクランク
室側からの冷却油ジェット流を前記第１の冷却油通路に
導入するジェット流入口とを有することを特徴とするピ
ストン。(1) Connecting a first cooling oil passage defined by a horizontal wall extending from the bottom wall of the Fukabayashi combustion section formed in the piston crown to the inner circumferential wall of the ring land, and the top wall surface of the bin boss and the bottom wall or the horizontal wall. a second cooling oil passage defined by a rib and in communication with the first cooling oil passage through an outlet bored in the side wall above the bottle boss; A piston characterized by having a jet inlet communicating with an oil passage and introducing a cooling oil jet flow from the crank chamber side into the first cooling oil passage.
斜する傾斜函を有する肉盛シ部が設けられていて、工程
中において前記ジェット流入口から逸れて前記傾斜面に
衝央する冷却油ジェット−流を径方向内方に導く仁とを
特徴とする第（１）項記載のピストン。(2) A built-up portion having a slanted box that slopes downward in the radial direction is provided near the edge of the jet inlet, and cooling is deflected from the jet inlet and concentrated on the inclined surface during the process. The piston according to item (1), characterized in that it has a groove that guides the oil jet flow radially inward.
を連通させる前記出口に上向きの仕切板が設けられてい
ることを特徴とする第伐）項記載のピストン。(3) The piston according to item (section), characterized in that an upward partition plate is provided at the outlet that communicates the first cooling oil passage with the second cooling oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10164581A JPS6055702B2 (en) | 1981-06-30 | 1981-06-30 | piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10164581A JPS6055702B2 (en) | 1981-06-30 | 1981-06-30 | piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS585455A true JPS585455A (en) | 1983-01-12 |
| JPS6055702B2 JPS6055702B2 (en) | 1985-12-06 |
Family
ID=14306108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10164581A Expired JPS6055702B2 (en) | 1981-06-30 | 1981-06-30 | piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6055702B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122251A (en) * | 1983-12-06 | 1985-06-29 | Japan Electronic Control Syst Co Ltd | Idle rotational speed control device for internal- combustion engine |
| US5040454A (en) * | 1988-10-21 | 1991-08-20 | Caterpillar Inc. | Piston assembly and piston member thereof having a predetermined compression height to diameter ratio |
| US5692430A (en) * | 1995-06-08 | 1997-12-02 | Caterpillar Inc. | Articulated piston apparatus including a cooling gallery |
| WO2007073719A1 (en) | 2005-12-21 | 2007-07-05 | Mahle International Gmbh | Piston for an internal combustion engine and method of producing it |
-
1981
- 1981-06-30 JP JP10164581A patent/JPS6055702B2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122251A (en) * | 1983-12-06 | 1985-06-29 | Japan Electronic Control Syst Co Ltd | Idle rotational speed control device for internal- combustion engine |
| JPH0567777B2 (en) * | 1983-12-06 | 1993-09-27 | Japan Electronic Control Syst | |
| US5040454A (en) * | 1988-10-21 | 1991-08-20 | Caterpillar Inc. | Piston assembly and piston member thereof having a predetermined compression height to diameter ratio |
| US5692430A (en) * | 1995-06-08 | 1997-12-02 | Caterpillar Inc. | Articulated piston apparatus including a cooling gallery |
| WO2007073719A1 (en) | 2005-12-21 | 2007-07-05 | Mahle International Gmbh | Piston for an internal combustion engine and method of producing it |
| US7921555B2 (en) | 2005-12-21 | 2011-04-12 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6055702B2 (en) | 1985-12-06 |
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