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JP5349596B2 - Piston cooling passage for internal combustion engines - Google Patents
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JP5349596B2 - Piston cooling passage for internal combustion engines - Google Patents

Piston cooling passage for internal combustion engines Download PDF

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JP5349596B2
JP5349596B2 JP2011523301A JP2011523301A JP5349596B2 JP 5349596 B2 JP5349596 B2 JP 5349596B2 JP 2011523301 A JP2011523301 A JP 2011523301A JP 2011523301 A JP2011523301 A JP 2011523301A JP 5349596 B2 JP5349596 B2 JP 5349596B2
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cooling passage
piston
openings
oil
opening
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JP2012500354A (en
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コロツェク ヘルムート
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Mahle International GmbH
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Mahle International GmbH
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    • 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

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  • 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

本発明は、請求項１の上位概念部に記載した、内燃機関用のピストンの冷却通路に関する。   The present invention relates to a cooling passage for a piston for an internal combustion engine described in the superordinate conceptual part of claim 1.

ヨーロッパ特許第１０６３４０９号明細書によれば、内燃機関のピストンのための冷却通路が公知である。この冷却通路は、互いに相並んで配置、かつ交互に流入開口として働２つの開口を有し、また、半径方向でこれらの開口と向き合う冷却通路の側に流出開口を有している。この公知の冷却通路においては、冷却通路内に導入されたオイルが、非常に高い流過速度で冷却通路を通って流れ、この際に、オイルの僅かな量が流出開口を介して流出し、残りのオイル量が高い流過速度で、交互に流入開口として利用される第２の開口に向かってさらに流れ、冷却通路から流出されるようになっている。ピストンの可変な位置に基づいて、この第２の開口にぶつかるオイル噴流によって、オイルの流出が停止され、それによってこの第２の開口を介してオイルが冷却通路内に導入されるようになると、オイル内に渦流が形成され、この渦流が、冷却通路内のオイルの流れを阻止し、それによってオイルの冷却効果を低下させることになる。   According to EP 1063409, a cooling passage for a piston of an internal combustion engine is known. The cooling passages are arranged side by side and have two openings which act alternately as inflow openings, and also have an outflow opening on the side of the cooling passage that faces these openings in the radial direction. In this known cooling passage, the oil introduced into the cooling passage flows through the cooling passage at a very high flow rate, with a small amount of oil flowing out through the outlet opening, The remaining amount of oil further flows toward the second opening, which is alternately used as the inflow opening, at a high flow rate, and flows out from the cooling passage. Based on the variable position of the piston, the oil jet that hits this second opening stops the oil outflow, so that oil is introduced into the cooling passage through this second opening, A vortex is formed in the oil, and this vortex blocks the flow of oil in the cooling passage, thereby reducing the cooling effect of the oil.

本発明の課題は、以上のような従来技術の欠点を避けることである。この課題は、請求項に記載した特徴を有する冷却通路によって解決された。   The object of the present invention is to avoid the drawbacks of the prior art as described above. This problem has been solved by a cooling passage having the features described in the claims.

本発明を以下に図面を用いて説明する。   The present invention will be described below with reference to the drawings.

本発明による冷却通路が配置されている、内燃機関用のピストンの概略的な斜視図である。1 is a schematic perspective view of a piston for an internal combustion engine in which a cooling passage according to the present invention is arranged.

図面には、ピストンリング部２と、ピストンヘッド３と、該ピストンヘッドとは反対側でピストンリング部２に接続されたピストンスカート４と、図示されていないピストンピンのためのピストン孔５とを有する、内燃機関用のピストン１が示されている。   The drawing shows a piston ring part 2, a piston head 3, a piston skirt 4 connected to the piston ring part 2 on the opposite side of the piston head, and a piston hole 5 for a piston pin (not shown). A piston 1 for an internal combustion engine is shown.

ピストン１のピストンヘッド３の近傍で半径方向外側に、環状の冷却通路６が配置されており、該冷却通路６は、一方側に２つの開口７及び８を有していて、これらの開口７，８は、それぞれ四分円状の通路湾曲部９及び１０を介して、冷却通路６の環状部分に接続されていて、ピストンヘッドとは反対側に向いている。これらの開口７，８は、オイルジェットノズル１１によって開口７，８に向かって噴射されるオイル１２のための流入開口として又は流出開口として用いられる。   In the vicinity of the piston head 3 of the piston 1, an annular cooling passage 6 is arranged radially outward, and the cooling passage 6 has two openings 7 and 8 on one side, and these openings 7. , 8 are connected to the annular portion of the cooling passage 6 via quadrant-shaped passage curved portions 9 and 10, respectively, and face the opposite side of the piston head. These openings 7, 8 are used as inflow openings or outflow openings for oil 12 that is injected by the oil jet nozzle 11 toward the openings 7, 8.

図面には、ピストン１の上死点に相当する、ピストン１の位置が示されている。この位置において、ピストン軸線１３を基準にして斜めに向けられたオイル流１２が開口８にぶつかり、それによって開口８は流入開口として働く。ピストン１が燃焼行程又は吸込み行程の枠内において矢印１４方向で下方に移動すると、所定のピストン位置から、開口７がオイル流１２にぶつかり、それによってこの開口７は、オイル１２のための流入開口として働く。   In the drawing, the position of the piston 1 corresponding to the top dead center of the piston 1 is shown. In this position, an oil flow 12 directed obliquely with respect to the piston axis 13 hits the opening 8, whereby the opening 8 serves as an inflow opening. When the piston 1 moves downwards in the direction of the arrow 14 in the frame of the combustion stroke or the suction stroke, the opening 7 hits the oil flow 12 from a predetermined piston position, so that this opening 7 is an inflow opening for the oil 12 Work as.

開口７及び８とは反対側で、冷却通路６は、ピストンヘッドとは反対側に向けられた流出開口１５及び１６を有している。流出開口１５と１６との間で、冷却通路６は、絞りとした働く横断面狭窄部１７を有している。   On the opposite side of the openings 7 and 8, the cooling passage 6 has outflow openings 15 and 16 which are directed away from the piston head. Between the outflow openings 15 and 16, the cooling passage 6 has a cross-section constriction 17 that acts as a throttle.

絞り１７は、一方では、図示されていないピストン１の位置において開口８内に噴射されたオイル１２の一部が流出開口１６から導出されるように作用し、他方では、さらに冷却通路６の左半部を通って流れるオイルの流れが減速されるように作用する。それによって、ピストン１の、矢印１４で示した下方運動時に、オイル１２の噴射方向と開口７とが合致し、ひいては開口７が流入開口として働き、また冷却通路６の左半部において、開口７を介して冷却通路６の左半部内に流入するオイル流を妨げるような渦流がオイル内に形成されないようになっている。この場合、オイルは開口７を介して冷却通路６の左半部を通って流れ、絞り１７が設けられていることによって冷却通路６からオイルの一部が流出開口１５から流出し、残りのオイル流が、絞り１７により制限されて、減速された速度で、冷却通路６の右側半部を通ってさらに流れ、開口８から流出するようになっている。これによって、冷却通路６内のオイルの流れ方向が迅速に切換えられ、それによってピストン１の改善された冷却が得られる。   On the one hand, the throttle 17 acts so that a part of the oil 12 injected into the opening 8 at the position of the piston 1 not shown is led out from the outflow opening 16, and on the other hand, further to the left of the cooling passage 6. It acts to decelerate the flow of oil flowing through the half. Thereby, during the downward movement of the piston 1 indicated by the arrow 14, the injection direction of the oil 12 and the opening 7 coincide with each other, so that the opening 7 functions as an inflow opening, and in the left half of the cooling passage 6, the opening 7 Thus, no vortex flow is formed in the oil so as to hinder the oil flow flowing into the left half of the cooling passage 6 via the. In this case, the oil flows through the left half of the cooling passage 6 through the opening 7, and by providing the throttle 17, part of the oil flows out of the cooling passage 6 from the outflow opening 15, and the remaining oil The flow is restricted by a restriction 17 and further flows through the right half of the cooling passage 6 at a reduced speed and out of the opening 8. As a result, the flow direction of the oil in the cooling passage 6 is rapidly switched, whereby an improved cooling of the piston 1 is obtained.

２ ピストンリング部、 ３ ピストンヘッド、 ４ ピストンスカート、 ６ 冷却通路、 ７，８ 開口、 ９，１０ 通路湾曲部、 １１ オイルジェットノズル、 １２ オイル、 １４ 矢印、 １５，１６ 流出開口、 １７ 横断面狭窄部，絞り   2 piston ring part, 3 piston head, 4 piston skirt, 6 cooling passage, 7,8 opening, 9,10 passage curved part, 11 oil jet nozzle, 12 oil, 14 arrow, 15,16 outflow opening, 17 cross section narrowing Part, aperture

Claims (1)

ピストンヘッド（３）とピストンリング部（２）とを有する、内燃機関用のピストン（１）の冷却通路（６）であって、該冷却通路（６）が環状に構成されており、該冷却通路（６）が、ピストン（１）のピストンヘッド（３）の近傍、かつ半径方向外方でピストンリング部（２）の近傍に互いに相並んで配置された、交互に流入開口として働く２つの開口（７，８）と、半径方向でこれらの開口（７，８）に向き合う、冷却通路（６）の側に少なくとも１つの流出開口（１５，１６）とを有している形式のものにおいて、
前記冷却通路（６）が、互いに相並んで配置された２つの流出開口（１５，１６）と、これらの流出開口の間に配置された、絞りとして働く横断面狭窄部（１７）とを有していることを特徴とする、内燃機関用のピストンの冷却通路。 A cooling passage (6) of a piston (1) for an internal combustion engine having a piston head (3) and a piston ring portion (2), wherein the cooling passage (6) is formed in an annular shape, Two passages (6), which are arranged side by side in the vicinity of the piston ring (2) in the vicinity of the piston head (3) of the piston (1) and in the radially outward direction, act alternately as inflow openings. In the form of having openings (7, 8) and at least one outflow opening (15, 16) on the side of the cooling passage (6) facing these openings (7, 8) in the radial direction ,
The cooling passage (6) has two outflow openings (15, 16) arranged side by side, and a cross-section narrowing portion (17) arranged between the outflow openings and acting as a throttle. A cooling passage for a piston for an internal combustion engine.
JP2011523301A 2008-08-19 2009-08-19 Piston cooling passage for internal combustion engines Expired - Fee Related JP5349596B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008038324.4 2008-08-19
DE102008038324A DE102008038324A1 (en) 2008-08-19 2008-08-19 Cooling channel of a piston for an internal combustion engine
PCT/DE2009/001162 WO2010020231A2 (en) 2008-08-19 2009-08-19 Cooling duct for a piston of a combustion engine

Publications (2)

Publication Number Publication Date
JP2012500354A JP2012500354A (en) 2012-01-05
JP5349596B2 true JP5349596B2 (en) 2013-11-20

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JP2011523301A Expired - Fee Related JP5349596B2 (en) 2008-08-19 2009-08-19 Piston cooling passage for internal combustion engines

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US (1) US20110174245A1 (en)
EP (1) EP2329126A2 (en)
JP (1) JP5349596B2 (en)
DE (1) DE102008038324A1 (en)
WO (1) WO2010020231A2 (en)

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Publication number Priority date Publication date Assignee Title
DE102011076455A1 (en) 2011-05-25 2012-11-29 Mahle International Gmbh Casting core for forming a cooling channel in a piston
WO2013052182A2 (en) * 2011-06-21 2013-04-11 Bayer Materialscience Llc Polycarbonate laminate for close-proximity blast events
DE102012213558A1 (en) 2012-08-01 2014-02-06 Mahle International Gmbh piston
JP2014185522A (en) * 2013-03-21 2014-10-02 Hitachi Automotive Systems Ltd Piston of internal combustion engine
JP2018508691A (en) * 2015-01-30 2018-03-29 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｌｌｃ Piston with cooling cavity cooling insert and method of construction

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JPH0742418U (en) * 1993-12-25 1995-08-04 株式会社ユニシアジェックス Piston for internal combustion engine
US5595145A (en) * 1995-05-31 1997-01-21 Kabushiki Kaisha Komatsu Seisakusho Cooling structure of diesel engine piston
DE19618625C1 (en) * 1996-05-09 1997-10-23 Daimler Benz Ag Liquid-cooled pistons for internal combustion engines
DE19703001C2 (en) * 1997-01-28 1998-12-03 Alcan Gmbh Liquid cooled piston
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JP2003301744A (en) * 2002-04-08 2003-10-24 Toyota Motor Corp Piston cooling device and method
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JP2007278220A (en) * 2006-04-10 2007-10-25 Toyota Motor Corp Piston cooling structure for internal combustion engine
DE102006056012A1 (en) * 2006-11-28 2008-05-29 Ks Kolbenschmidt Gmbh Variable design cooling channel for one piston
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EP2329126A2 (en) 2011-06-08
WO2010020231A2 (en) 2010-02-25
JP2012500354A (en) 2012-01-05
WO2010020231A3 (en) 2010-04-15
US20110174245A1 (en) 2011-07-21
DE102008038324A1 (en) 2010-02-25

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