JPS61244820A - Cooling device for piston - Google Patents
Cooling device for pistonInfo
- Publication number
- JPS61244820A JPS61244820A JP8732285A JP8732285A JPS61244820A JP S61244820 A JPS61244820 A JP S61244820A JP 8732285 A JP8732285 A JP 8732285A JP 8732285 A JP8732285 A JP 8732285A JP S61244820 A JPS61244820 A JP S61244820A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder surface
- nozzle
- lubricating oil
- piston
- temperature
- 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
Links
- 238000001816 cooling Methods 0.000 title claims description 15
- 239000010687 lubricating oil Substances 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 22
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はクランクケース内の潤滑油通路をピストン背面
に向うノズルに接続したピストン冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a piston cooling device in which a lubricating oil passage in a crankcase is connected to a nozzle facing the back of the piston.
（従来技術）
現在のピストンジェット油冷却装置では、通常低負荷時
におけるピストン過冷却防止のためチェックバルブが付
いている。第３図はその一例を示しており、第３図にお
いて１はノズル、２はノズル固定用のボルト、３はクラ
ンクケース、４は潤滑油通路（ギヤラリ−）、５はシリ
ンダライナー、６はピストンである。そしてボルト２内
にチェックバルブＣ１の弁体となるピストン７と、開弁
圧を定めるばね８と、ばね８を支持するための止め板９
、止め輪１０が組込まれている。このチェックバルブＣ
１は潤滑油調圧弁（図示せず）の調圧値（潤滑油通路４
内の油圧）の大略５０％の値にて作動（開弁）するよう
に設定されている。しかし調圧弁の調圧性能曲線（第４
図）を考慮すると、低いエンジン回転数にて既に油圧は
高く、ビストン冷却装置内のチェックバルブＣ１は開ぎ
っばなしとなり、ピストンは過冷却されることが多かっ
た。特に冬場は外気温が低いにもかかわらずチェックバ
ルブＣ１の設定値は一定のままであるため、ますます過
冷却されることになっていた。又第３図に示す従来の構
造では、調圧作用をさせるためにピストン７（又は鋼球
）、ばね８の他にこれらを保持する止め板９、止め輪１
０（又は止めナツト）等の多数の部品が必要であった。(Prior Art) Current piston jet oil cooling systems are usually equipped with a check valve to prevent piston overcooling during low loads. Figure 3 shows an example. In Figure 3, 1 is a nozzle, 2 is a bolt for fixing the nozzle, 3 is a crankcase, 4 is a lubricating oil passage (gear rally), 5 is a cylinder liner, and 6 is a piston. It is. Inside the bolt 2, there is a piston 7 that becomes the valve body of the check valve C1, a spring 8 that determines the valve opening pressure, and a stop plate 9 that supports the spring 8.
, a retaining ring 10 is incorporated. This check valve C
1 is the pressure regulation value of the lubricating oil pressure regulating valve (not shown) (lubricating oil passage 4
The valve is set to operate (open) at approximately 50% of the internal oil pressure. However, the pressure regulating performance curve of the pressure regulating valve (the fourth
(Figure), the oil pressure was already high at low engine speeds, the check valve C1 in the piston cooling system was left open, and the piston was often overcooled. Particularly in winter, the set value of check valve C1 remains constant despite the low outside temperature, resulting in even more supercooling. Furthermore, in the conventional structure shown in FIG. 3, in addition to the piston 7 (or steel ball) and spring 8, a retaining plate 9 and a retaining ring 1 are provided to hold these components in order to perform a pressure regulating action.
A large number of parts such as 0 (or locking nuts) were required.
従来又第３図のばね８と止め板９の間に高温時に軸方向
長さが縮小する形状記憶合金からなるコイルばね状スペ
ーサを組込んだピストン冷却装置も既に提案されている
（例えば実開昭５９−１８６４１６．５９−１８６４１
７＞。とごろがその場合は第３図に示す多数のチェック
バルブ構成部品以外に形状記憶合金製スペーサが必要−
となり、部品点数の増加とそれに伴うコストアップが避
けられない。しかも油温を感知する形状記憶合金製スペ
ーサは弁作用をする鋼球の下流側に設置されているので
、ＴＡ潤滑油はさらされておらず、従って油温変化に迅
速に対応することはできない、。Conventionally, a piston cooling device has already been proposed in which a coil spring-like spacer made of a shape memory alloy whose axial length decreases at high temperatures is incorporated between the spring 8 and the stop plate 9 shown in FIG. Showa 59-186416.59-18641
7>. In that case, a shape memory alloy spacer is required in addition to the many check valve components shown in Figure 3.
Therefore, an increase in the number of parts and an accompanying cost increase are unavoidable. Moreover, the shape memory alloy spacer that senses oil temperature is installed downstream of the steel ball that acts as a valve, so the TA lubricant is not exposed and therefore cannot respond quickly to changes in oil temperature. ,.
（発明の目的）
本発明は冷却油量調整のパラメータを従来の油圧から油
温に変更することにより、より高精度の油ｆ！ｉ調整を
可能とし、夏、冬を問わず過冷却することなしにピスト
ン冷却ができるようにすると其に、従来のチェックバル
ブを構成していた多数の部品（ピストン又は鋼球、ばね
１、止め板、止め輪、スペーサ等）を省略できるように
することを目的としている。(Object of the Invention) The present invention changes the parameter for adjusting the amount of cooling oil from the conventional oil pressure to the oil temperature, thereby achieving more accurate oil f! It is possible to cool the piston without overcooling regardless of whether it is summer or winter. The purpose is to make it possible to omit the need for plates, retaining rings, spacers, etc.).
（発明の構成）
本発明はクランクケース内の潤滑油通路をピストン背面
に向うノズルに接続したピストン冷却装置において、上
記潤滑油通路の連通した有底のシリンダ面と、ノズルに
連通しかつ上記シリンダ面に開口する連絡孔を設け、シ
リンダ面の内側にノズルからの潤滑油噴射を要する設定
温度以上でシリンダ面より内方へ縮径し、上記設定温度
未満でシリンダ面に圧接又は近接するように拡径する形
状記憶合金製巻き板弁を配置したことを特徴とするピス
トン冷却装置である。(Structure of the Invention) The present invention provides a piston cooling device in which a lubricating oil passage in a crankcase is connected to a nozzle facing the back of the piston. A communication hole is provided that opens on the surface, and the diameter contracts inward from the cylinder surface at a temperature higher than a set temperature that requires lubricant injection from a nozzle on the inside of the cylinder surface, and it comes into pressure contact with or close to the cylinder surface below the set temperature. This is a piston cooling device characterized by disposing a shape memory alloy wound plate valve that expands in diameter.
（実施例）
実施例を示す第１図において第３図中の符号と同一符号
は対応部分である。第１図のボルト２はノズル１の基端
の筒状継手部１３をクランクケース３に締着するように
クランクケース３内にねじ部１４において螺合している
。又ボルト２は内部に潤滑油通路４に連通した有底のシ
リンダ面１５を備え、底部中央には小径の突起１６を一
体に有する。シリンダ面１５の下半部中央には複数個の
連絡孔１７がシリンダ面１５と直角方向に放射状に設け
てあり、各連絡孔１７は継手部１３内の環状溝１８を経
てノズル１内の通路１９に連通している。(Example) In FIG. 1 showing an example, the same reference numerals as those in FIG. 3 indicate corresponding parts. The bolt 2 shown in FIG. 1 is screwed into the crankcase 3 at a threaded portion 14 so as to fasten the cylindrical joint portion 13 at the base end of the nozzle 1 to the crankcase 3. The bolt 2 also has a bottomed cylinder surface 15 that communicates with the lubricating oil passage 4, and has a small-diameter projection 16 integrally formed in the center of the bottom. A plurality of communication holes 17 are provided radially in the center of the lower half of the cylinder surface 15 in a direction perpendicular to the cylinder surface 15, and each communication hole 17 passes through an annular groove 18 in the joint part 13 to a passage in the nozzle 1. It is connected to 19.
２０は形状記憶合金製の巻き板弁でノズル１からピスト
ンに向い潤滑油噴射を要する設定温度未満で第１図のよ
うにシリンダ面１５に圧接し、連絡孔１７を閉塞してい
る。この時の巻き板弁２０の横断面は第２図（イ）のよ
うに僅かな切目２１を有する略円形である。シリンダ面
１５内の油温が上記設定温度以上になると、巻き板弁２
０は第１図の仮想線２０−のようにシリンダ面１５から
内方へ縮径し、突起１６を抱持する。その時の横断面図
は第２図（ロ）のような螺旋状である。Reference numeral 20 denotes a wound plate valve made of a shape memory alloy, which is directed from the nozzle 1 toward the piston and presses against the cylinder surface 15 as shown in FIG. 1 when the temperature is lower than a set temperature that requires lubricating oil injection, thereby closing the communicating hole 17. At this time, the cross section of the rolled plate valve 20 is approximately circular with slight cuts 21 as shown in FIG. 2(A). When the oil temperature inside the cylinder surface 15 exceeds the above set temperature, the winding plate valve 2
0 decreases in diameter inward from the cylinder surface 15 as indicated by the imaginary line 20- in FIG. The cross-sectional view at that time has a spiral shape as shown in FIG. 2 (b).
巻き板弁２０は常時潤滑油通路４内の潤滑油にさらされ
ているため、潤滑油温度が上記設定値未満では第１図実
線のように連絡孔１７を閉塞し、ノズル１からピストン
へ向うＨＥ！ｉ油の噴出が停止づる。油温が設定温度以
上になると、巻き板弁２０は第１図仮想線２０−のよう
に縮径Ｊるため連絡孔１７が開きノズル１からピストン
へ冷却用の潤滑油が噴出する。Since the plate valve 20 is constantly exposed to the lubricating oil in the lubricating oil passage 4, when the lubricating oil temperature is lower than the above set value, the communication hole 17 is closed as shown by the solid line in Figure 1, and the lubricating oil flows from the nozzle 1 to the piston. HE! i Oil stops gushing out. When the oil temperature exceeds the set temperature, the diameter of the plate valve 20 is reduced as shown by the imaginary line 20- in FIG. 1, so that the communicating hole 17 opens and cooling lubricating oil is jetted from the nozzle 1 to the piston.
（発明の効果）
本発明によると巻き板弁２０が常時用滑油通路４内の潤
滑油にさらされる形になるため、冷却１油量の調整パラ
メータを従来の油圧から油温に変更することができ、よ
り高精度の油６調整が可能となる。従って夏、冬を問わ
ず、ピストンの過冷却を確実に防止し得る利点がある。(Effects of the Invention) According to the present invention, the plate valve 20 is exposed to the lubricating oil in the lubricating oil passage 4 at all times, so the adjustment parameter for the amount of cooling oil can be changed from the conventional oil pressure to the oil temperature. This allows for more accurate oil 6 adjustment. Therefore, there is an advantage that overcooling of the piston can be reliably prevented regardless of whether it is summer or winter.
又巻き板弁２０が直接連絡孔１７を開閉する弁体となる
ため、従来のチェックバルブ０１ （第３図）で必要
であったばね８、止め板９、止め輪・１０等の部品を全
て廃止することができ、構造が簡単安価にまとまる。In addition, since the rolled plate valve 20 serves as a valve body that directly opens and closes the communication hole 17, all parts such as the spring 8, stop plate 9, and retaining ring 10 that were necessary in the conventional check valve 01 (Fig. 3) are eliminated. The structure is simple and inexpensive.
（別の実施例）
油温が上記設定値未満の時、巻ぎ板弁２０がシリンダ面
１５に僅かな隙間を隔てて近接づるように特性を定める
と、設定温度未満において潤滑油通路４内の潤滑油をご
く僅かずつノズル１側へ送り、巻き板弁２０の温度を可
及的に油温に近付け、油温変化に一層迅速に対応させる
ことができる。(Another Example) If the characteristics are determined so that the rolled plate valve 20 approaches the cylinder surface 15 with a slight gap when the oil temperature is less than the above set value, the inside of the lubricating oil passage 4 is lower than the set temperature. The lubricating oil is sent to the nozzle 1 side in very small amounts, so that the temperature of the winding plate valve 20 can be brought as close to the oil temperature as possible, so that changes in oil temperature can be responded to more quickly.
切目２１（第２図）を常時連絡孔１７の１つに連通させ
るように巻き板弁２０とボルト２の間に位置決め機構（
凹凸等）を設けることにより、常時小断面のバイパスを
形成し、同様の効果を期待することができる。A positioning mechanism (
By providing irregularities, etc.), a bypass with a small cross section can be formed at all times, and a similar effect can be expected.
第１図は本発明による冷却装置の縦断面図、第２図は第
１図のＩＩ−ＩＩ線に沿う横断面部分図とその変形横断
面図、第３図は従来構造の一例を示す縦断面図、第４図
は油圧とエンジン回転数の関係を示すグラフである。１
・・・ノズル、３・・・クランクケース、４・・・潤滑
油通路、６・・・ピストン、１５・・・・シリンダ面、
１７・・・連絡孔、２０・・・巻き板弁特許出願人 ヤ
ンマーディーゼル株式会社１占荘−７−５・
第１図 第２図FIG. 1 is a vertical sectional view of a cooling device according to the present invention, FIG. 2 is a partial cross-sectional view taken along line II-II in FIG. 1 and a modified cross-sectional view thereof, and FIG. 3 is a vertical cross-sectional view showing an example of a conventional structure The top view and FIG. 4 are graphs showing the relationship between oil pressure and engine speed. 1
...Nozzle, 3...Crankcase, 4...Lubricating oil passage, 6...Piston, 15...Cylinder surface,
17...Communication hole, 20...Rolling plate valve Patent applicant Yanmar Diesel Co., Ltd. 1-7-5・ Figure 1 Figure 2
Claims (3)
向うノズルに接続したピストン冷却装置において、上記
潤滑油通路の連通した有底のシリンダ面と、ノズルに連
通しかつ上記シリンダ面に開口する連絡孔を設け、シリ
ンダ面の内側にノズルからの潤滑油噴射を要する設定温
度以上でシリンダ面より内方へ縮径し、上記設定温度未
満でシリンダ面に圧接又は近接するように拡径する形状
記憶合金製巻き板弁を配置したことを特徴とするピスト
ン冷却装置。(1) In a piston cooling system in which a lubricating oil passage in the crankcase is connected to a nozzle facing the back of the piston, a bottomed cylinder surface with which the lubricating oil passage communicates and a connection that communicates with the nozzle and opens on the cylinder surface. A shape memory device with a hole provided inside the cylinder surface that contracts inward from the cylinder surface when the temperature exceeds a set temperature that requires lubricant injection from a nozzle, and expands to come into contact with or close to the cylinder surface when the temperature is lower than the above set temperature. A piston cooling device characterized by having an alloy wound plate valve arranged therein.
の接続部に設けられている特許請求の範囲第１項記載の
ピストン冷却装置。(2) The piston cooling device according to claim 1, wherein the cylinder surface is provided at the connection portion between the crankcase lubricating oil passage and the nozzle.
請求の範囲第１項記載のピストン冷却装置。(3) The piston cooling device according to claim 1, wherein the communication hole opens at the center of the cylinder surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8732285A JPS61244820A (en) | 1985-04-23 | 1985-04-23 | Cooling device for piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8732285A JPS61244820A (en) | 1985-04-23 | 1985-04-23 | Cooling device for piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61244820A true JPS61244820A (en) | 1986-10-31 |
Family
ID=13911614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8732285A Pending JPS61244820A (en) | 1985-04-23 | 1985-04-23 | Cooling device for piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61244820A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0979931A1 (en) * | 1998-08-13 | 2000-02-16 | Cummins Engine Company, Ltd. | Mounting a cooling nozzele on an engine block |
| WO2004059141A1 (en) * | 2002-12-20 | 2004-07-15 | Daimlerchrysler Ag | Temperature controlled oil injection nozzle for cooling pistons |
| FR2866386A1 (en) * | 2004-02-13 | 2005-08-19 | Lc Maitre Ind | Valve for jet nozzle, has elastically deformable portion pushing rounded portion, forming valve piece, against annular valve seat to seal passage between channel whose end constitutes seat and distribution channel |
| WO2007031047A1 (en) * | 2005-09-16 | 2007-03-22 | Ixetic Hückeswagen Gmbh | Valve for piston cooling nozzles |
-
1985
- 1985-04-23 JP JP8732285A patent/JPS61244820A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0979931A1 (en) * | 1998-08-13 | 2000-02-16 | Cummins Engine Company, Ltd. | Mounting a cooling nozzele on an engine block |
| WO2004059141A1 (en) * | 2002-12-20 | 2004-07-15 | Daimlerchrysler Ag | Temperature controlled oil injection nozzle for cooling pistons |
| FR2866386A1 (en) * | 2004-02-13 | 2005-08-19 | Lc Maitre Ind | Valve for jet nozzle, has elastically deformable portion pushing rounded portion, forming valve piece, against annular valve seat to seal passage between channel whose end constitutes seat and distribution channel |
| WO2007031047A1 (en) * | 2005-09-16 | 2007-03-22 | Ixetic Hückeswagen Gmbh | Valve for piston cooling nozzles |
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