EP1273774A1 - Spritzdüse für Kolbenkühlung - Google Patents

Spritzdüse für Kolbenkühlung Download PDF

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Publication number
EP1273774A1
EP1273774A1 EP20020356115 EP02356115A EP1273774A1 EP 1273774 A1 EP1273774 A1 EP 1273774A1 EP 20020356115 EP20020356115 EP 20020356115 EP 02356115 A EP02356115 A EP 02356115A EP 1273774 A1 EP1273774 A1 EP 1273774A1
Authority
EP
European Patent Office
Prior art keywords
piston
fluid
bore
downstream
cooling
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
Application number
EP20020356115
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English (en)
French (fr)
Other versions
EP1273774B1 (de
Inventor
Christophe Bontaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bontaz Centre SA
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Bontaz Centre SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Bontaz Centre SA filed Critical Bontaz Centre SA
Publication of EP1273774A1 publication Critical patent/EP1273774A1/de
Application granted granted Critical
Publication of EP1273774B1 publication Critical patent/EP1273774B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/265—Plural outflows
    • Y10T137/2663—Pressure responsive

Definitions

  • the present invention relates to sprinklers cooling of the pistons of an internal combustion engine, for spraying a cooling fluid such as oil against the piston bottom, i.e. against the face of piston outside the explosion chamber, or in a gallery piston.
  • a cooling fluid such as oil against the piston bottom, i.e. against the face of piston outside the explosion chamber, or in a gallery piston.
  • Piston cooling jets usually used are attachments, fixed on the crankcase and communicating with a cooling fluid supply orifice.
  • the position of the nozzle is precisely determined to achieve a jet of coolant directed to a specific area of the piston bottom or piston gallery.
  • the cooling nozzles generally have a valve, to inhibit the circulation of fluid from cooling as long as the cooling system pressure did not exceed a determined threshold value.
  • nozzle structures are used, the valve is made by a ball, pushed back by a spring compression to a seat to block a fluid passage from cooling. These structures are short and compact.
  • the inventors have observed that the sprinklers of valve cooling used so far work correctly and give satisfaction for a limited time, duration after which wear phenomena appear which disturb the sealing of the valve and its correct functioning.
  • the the correct operating time is shorter as the nominal pressure of the coolant prevailing in the cooling pipes is high.
  • Wear changes mainly the opening characteristics of the valve, i.e. the fluid pressure necessary to trigger it: new, the valve opens at a correct nominal pressure; after wear, the valve opens at lower pressure, up to half of the correct nominal pressure, therefore below the idle speed of the motor. This results in a disturbance of the general pressure fluid in the engine.
  • the invention results from the observation that the wear phenomena are inevitable because of the very structure of the ball valve: under high pressure, phenomena occur of oscillation and vibration of the ball, phenomena which cause wear faults.
  • the problem proposed by the present invention is to design a new valve sprinkler structure, capable of to function properly for a significantly longer period long, especially without significant wear.
  • a piston valve does not have the disadvantages of oscillation and vibration of the ball valves, so that one use satisfactory can be achieved for a significantly longer period long.
  • Another problem that the invention proposes to solve is to reduce the size of the nozzle in the engine cylinder.
  • the piston valves of document JP 07 317519 A lead to a relatively large size, and in particular a relatively large length downstream of the outlet orifices of the valve for guiding the piston. Too long downstream of the valve outlet openings there is a risk of collision with rotating engine components such as the crankshaft or the crankshaft counterweight.
  • the invention aims to reduce the total length of the nozzle, and in particular the length of the nozzle exceeding in the engine cylinder downstream of the radial passage outlet structure fluid and outlet tube.
  • the invention provides a piston cooling nozzle for a internal combustion, comprising a part of a nozzle penetrating shaped to engage in an engine bore and to receive a cooling fluid arriving through said bore, comprising an internal valve to modulate the flow of fluid according to its pressure, and comprising a structure of outlet with radial passage of fluid in the nozzle body and at outlet tube, suitable for transmitting the cooling leaving the internal valve and directing it in a jet against the bottom of the engine piston to be cooled;
  • the internal valve comprises a piston, having a downstream section with lateral surface cylindrical guide engaged in longitudinal sliding in a guide bore integral with the nozzle body, having a head shutter oriented upstream in the direction of flow of the coolant to come selectively wear against a annular closure seat integral with the nozzle body and crossed by the coolant, and the internal valve includes an axially engaged helical compression spring between a downstream surface integral with the nozzle body and a surface downstream of the piston to urge the piston upstream against the annular shutter seat.
  • Such a structure has great endurance, high stability, which reduces oscillations and very wear phenomena.
  • the guide bore in which the piston slides is essentially inside a section upstream of the nozzle body, upstream of the radial fluid passage, and fluid conduction passages axially conduct the fluid from downstream of the annular obturation seat to radial passage of fluid as soon as the piston moves away from the seat sealing ring, so that, in the open state of the valve internal, the piston is located mainly upstream of the passage radial of fluid.
  • downstream section of piston has a downstream coaxial housing in which engages and is guided the upstream end portion of the coil spring of compression.
  • the nozzle body includes a through axial bore, in which is engaged without play and held in position a tubular jacket with axial bore a downstream section of which forms the guide bore receiving the section downstream of the piston, the tubular jacket having a shoulder internal intermediate forming the annular obturation seat, at minus a radial hole being provided in the wall of the tubular jacket immediately downstream of the annular shutter seat to drive radially the fluid towards one or more peripheral passages provided between the outer surface of the tubular jacket and the surface of the axial bore passing through the nozzle body, said peripheral passages being adapted to axially drive the coolant from the radial hole (s) to radial passage of fluid in the nozzle body.
  • the piston is upstream of the passage fluid outlet radial.
  • peripheral passage (s) are made by a larger axial bore section diameter, while the tubular liner has an outer diameter substantially constant leaving an annular intermediate space through which the coolant flows.
  • the tubular jacket is made of steel sintered, while the piston is made of steel.
  • the piston is made of steel.
  • the piston comprises, between its downstream section with cylindrical lateral guide surface and head obturation, an external annular recess defining, with the wall of the guide bore, an annular housing communicating by radial piston holes with an axial piston bore open downstream in the axial bore through the body which leads the coolant to the radial passage of fluid in the nozzle body.
  • the piston in the open state of the valve, the piston is clearly upstream of the radial passage of fluid outlet.
  • the annular obturation seat can be a ring ring added in the axial bore passing through the body of nozzle.
  • a piston cooling jet for a internal combustion includes a nozzle body 1, a valve internal 2, and an output structure 3 adapted to transmit the cooling fluid leaving the valve and for directing it jet at least against the bottom of a piston to cool.
  • the nozzle body 1 comprises a penetrating part 4, shaped to engage in a motor bore and to receive a cooling fluid arriving through said engine bore.
  • the nozzle body 1 has a protruding part 5, intended to protrude into the engine cylinder and carry the outlet structure 3.
  • the internal valve 2 comprises a piston 6, having a downstream section 7 with a lateral surface 8 cylindrical guide engaged in longitudinal sliding in a guide bore 9 integral with the nozzle body 1.
  • the piston 6 comprises a closure head 10, oriented upstream in the direction of flow of the coolant to come and carry selectively against an annular closure seat 11 secured sprinkler body 1 and having a seat bore 12 for be crossed by the coolant.
  • the internal valve 2 further comprises a spring compression helical 13, engaged axially between a span downstream 14 integral with the nozzle body 1 and a downstream surface 15 of the piston 6, to urge piston 6 upstream against the seat sealing ring 11.
  • the outlet structure 3 comprises at least one passage radial of fluid 17 in the nozzle body 1, and at least one tube outlet 18 having a first end fitted into the passage corresponding fluid radial 17.
  • the piston 6 slides in the guide bore 9 to inside an upstream section 16 of nozzle body 1, upstream of the radial passage of fluid 17, between a closed position of valve and a valve open position. In position valve opening, the piston 6 remains essentially upstream of the radial passage of fluid 17.
  • the invention provides, in both of the illustrated embodiments, passages of fluid conduction conducting the fluid axially from downstream from the annular obturation seat 11 to the radial passage of fluid 17 as soon as the piston moves away from the annular seat obturation 11.
  • the fluid conduction passages will be described below, and have different structures in both of the illustrated embodiments.
  • the downstream section 7 of the piston 6 comprises a downstream coaxial housing 19 in which engages and is guided the upstream end portion 20 of the coil spring of compression 13.
  • the nozzle body 1 includes an axial through bore 21, along the axis I-I of the body of nozzle 1, in which the piston 6 slides axially.
  • a shirt tubular 22 is engaged without play and held in position in the axial bore passing through 21, in the protruding part 5 of the nozzle, being engaged between a downstream plug 39 and a ring upstream 40.
  • the tubular jacket 22 includes an axial bore 23, a downstream section forms the guide bore 9 receiving the section downstream of the piston 6.
  • the tubular liner 22 includes a shoulder internal intermediate forming the annular obturation seat 11.
  • At least one radial hole 24 is provided in the wall of the tubular liner 22, immediately downstream of the annular seat obturation 11, to conduct the fluid radially to one or several peripheral passages 25 provided between the external surface of the tubular jacket 22 and the surface of the axial bore through 21 of the nozzle body 1.
  • the peripheral passages 25 are suitable for axially conducting the coolant from the radial hole (s) 24 to the radial passage of fluid 17 in the nozzle body 1.
  • the piston 6 can be placed permanently in upstream of the radial passage of fluid 17 in the nozzle body 1, and the protruding part 5 can thus have a reduced volume.
  • peripheral passages 25 are produced by a section of bore axial through 21 of larger diameter, while the jacket tubular 22 has a substantially constant external diameter, leaving an annular intermediate space through which the fluid flows cooling.
  • the shirt tubular 22 can advantageously be made of sintered steel, while the piston 6 is made of steel. This results in a very low coefficient of friction, and good lubrication between the piston 6 and the tubular jacket 22, facilitating the movements of the piston without wear and reducing the risks of seizing.
  • This first embodiment further promotes the stability of the valve, by the fact that the valve is submitted upstream at coolant pressure, while it is not downstream subject only to air pressure and the restoring force of the spring.
  • the valve is therefore either open when the fluid pressure is greater than the force of the spring, either closed in the case otherwise, but never vibrates between the two positions.
  • the piston 6 comprises, between its downstream section 7 with a lateral cylindrical surface 8 of guide and shutter head 10, an external annular recess 26 defining, with the wall of the guide bore 9, a annular housing communicating by radial piston holes 27 with an axial bore of piston 28 open downstream in the axial bore through body 21 which conducts the fluid cooling down to the radial passage of fluid 17 in the body sprinkler 1.
  • This second structure also makes it possible to place the piston 6 permanently upstream of the radial passage of fluid 17 in the nozzle body 1, ensuring the axial conduction of the fluid from the annular obturation seat 11 to the radial passage fluid 17.
  • vent 29 downstream of the housing containing the spring helical compression 13, vent 29 allowing passage air in and out of the spring housing during movement of the piston 6.
  • the vent 29 is produced in the downstream plug 39.
  • the seat sealing ring 11 is an annular ring 30, attached in the axial bore passing through 21 of the nozzle body.
  • the coolant arrives from the upstream end 31, in a bore of the engine block.
  • the fluid pressure cooling is above a predetermined threshold, the fluid pushes the piston 6 against the return force exerted by the helical compression spring 13, so that the coolant can pass between the shutter head 10 and the annular closure seat 11.
  • the fluid cooling passes radially through the radial holes 24, then axially along the peripheral passages 25, to reach the radial passage of fluid 17 and exit through the tubes of exit 18.
  • the fluid cooling passes between the annular closure seat 11 and the shutter head 10 is distributed in the annular recess external 26, passes radially towards the center through the radial holes piston 27, then moves axially in the axial bore of piston 28 then in the axial bore passing through 21 of the body which leads the coolant to the radial passage of fluid 17 and outlet tube 18.
  • Figure 7 illustrates the installation of a sprinkler according to the invention in an internal combustion engine.
  • the figure illustrates an engine part, comprising an engine half-cylinder.
  • the nozzle 32 is attached to the wall of the housing.
  • cylinder 33 inside the engine, for taking fluid from cooling flowing in a cooling pipe 34 and to spray the coolant into the cylinder engine against the bottom 35 of the engine piston 36, i.e. against the face of the engine piston which is outside the chamber explosion 37.
  • the penetrating part 4 of the nozzle 32 is engaged in a corresponding bore of cylinder housing 33, communicating with the cooling pipe 34.
  • the nozzle is thus fixed by any known means, for example force fitted or screwed into the corresponding bore in cylinder housing 33.
  • the part protruding 5 of the nozzle 32 protrudes inside the cylinder engine. We can see the outlet tube 18, which is bent so that its outlet port 38 is directed upwards against the bottom 35 of piston 36.
  • An internal combustion engine can thus include advantageously piston cooling nozzles according to the invention, as described above, set out in the piston chambers and adapted to each project the fluid of cooling in a concentrated jet against the bottom of a piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Surgical Instruments (AREA)
  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Medicinal Preparation (AREA)
EP20020356115 2001-07-04 2002-06-21 Spritzdüse für Kolbenkühlung Revoked EP1273774B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0109046 2001-07-04
FR0109046A FR2827009B1 (fr) 2001-07-04 2001-07-04 Gicleur de refroidissement a piston

Publications (2)

Publication Number Publication Date
EP1273774A1 true EP1273774A1 (de) 2003-01-08
EP1273774B1 EP1273774B1 (de) 2006-09-13

Family

ID=8865247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020356115 Revoked EP1273774B1 (de) 2001-07-04 2002-06-21 Spritzdüse für Kolbenkühlung

Country Status (9)

Country Link
US (1) US6672262B2 (de)
EP (1) EP1273774B1 (de)
CN (1) CN100404812C (de)
AT (1) ATE339605T1 (de)
BR (1) BR0202521B1 (de)
DE (1) DE60214626T2 (de)
ES (1) ES2271205T3 (de)
FR (1) FR2827009B1 (de)
PT (1) PT1273774E (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844002A1 (fr) * 2002-09-02 2004-03-05 Bontaz Centre Sa Gicleur a projections multiples pour refroidissement de moteur, et moteurs equipes de tels gicleurs
US6895905B2 (en) 2002-09-02 2005-05-24 Bontaz Centre Multiple spray engine cooling nozzle and engines equipped with such nozzles
FR2885170A1 (fr) * 2005-05-02 2006-11-03 Bontaz Ct Sa Clapet a fuite controlee pour gicleur de refroidissement de piston
EP1980729A1 (de) 2007-03-16 2008-10-15 Bontaz Centre Kühlungseinspritzdüse mit einer Klappe
EP2282089A1 (de) 2009-08-05 2011-02-09 HAWE Hydraulik SE Hydraulikventil
USD921044S1 (en) * 2019-08-02 2021-06-01 Transportation Ip Holdings, Llc Piston cooling apparatus
USD928201S1 (en) * 2019-08-02 2021-08-17 Transportation Ip Holdings, Llc Piston cooling apparatus

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DE10214830A1 (de) * 2002-04-04 2004-01-08 Mahle Gmbh Öleinlass für einen mit Kühlkanal versehenen Kolben eines Verbrennungsmotors
DE10261180A1 (de) * 2002-12-20 2004-07-01 Daimlerchrysler Ag Temperaturgeregelte Ölspritzdüse zur Kolbenkühlung
US7152623B2 (en) 2003-09-09 2006-12-26 Metaldyne Company, Llc Fluid jet for providing fluid under pressure to a desired location
US7086354B2 (en) 2003-10-29 2006-08-08 Deere & Company Cooling nozzle mounting arrangement
US7063049B2 (en) * 2004-03-03 2006-06-20 Deere & Company Directed spray jet and installation tool
US20060169331A1 (en) * 2004-08-09 2006-08-03 Neto Jose C Fluid jet with noise reducing sleeve
CN101137859B (zh) * 2004-12-21 2011-03-16 金属达因公司 具有减噪套筒的流体喷射器
US8397749B2 (en) * 2007-09-07 2013-03-19 Metaldyne Company Llc Piston cooling jet with tracking ball orifice
CN101865015B (zh) * 2010-06-02 2011-11-16 奇瑞汽车股份有限公司 一种活塞冷却喷嘴
JP5827164B2 (ja) * 2012-04-04 2015-12-02 トヨタ自動車株式会社 オイルジェット
US8875668B2 (en) * 2012-08-31 2014-11-04 Honda Motor Co., Ltd. Apparatus configured to shelter oil-jet device from inadvertent installation damage
JP5680601B2 (ja) * 2012-09-29 2015-03-04 大豊工業株式会社 ピストンクーリングジェット
JP6148111B2 (ja) * 2013-08-09 2017-06-14 トヨタ自動車株式会社 オイルジェット
JP6030585B2 (ja) 2014-01-17 2016-11-24 トヨタ自動車株式会社 オイルジェットバルブの取付方法
GB201519640D0 (en) * 2015-11-06 2015-12-23 Gm Global Tech Operations Inc Piston cooling jet for an internal combustion engine
CN105736112B (zh) * 2016-02-05 2018-04-24 重庆科克发动机技术有限公司 一种发动机冷却润滑油喷嘴
DE102016202643A1 (de) * 2016-02-22 2017-08-24 Mahle International Gmbh Kolben einer Brennkraftmaschine
CN106762079A (zh) * 2016-12-09 2017-05-31 重庆小康工业集团股份有限公司 发动机活塞冷却机构
CN106499493B (zh) * 2016-12-09 2020-03-10 重庆小康工业集团股份有限公司 发动机活塞冷却用喷油头
FR3067437B1 (fr) * 2017-06-13 2019-08-02 Bontaz Centre R & D Gicleur de fluide axial a clapet evente
US10704450B2 (en) * 2017-06-16 2020-07-07 Illinois Tool Works Inc. Piston cooling jet assembly
EP3649333B1 (de) * 2017-07-07 2023-06-14 Volvo Truck Corporation Düse zum kühlen von motorkolben
DE102017223465A1 (de) 2017-12-20 2019-06-27 Volkswagen Aktiengesellschaft Kolbenkühldüse
US11333140B2 (en) * 2019-06-11 2022-05-17 Caterpillar Inc. Cooling block for multi-cylinder air compressor
CN110682213A (zh) * 2019-11-13 2020-01-14 浙江方圆机床制造有限公司 砂轮修整器
FR3103244B1 (fr) * 2019-11-15 2022-12-23 Bontaz Centre R&D Clapet à piston compact
WO2021224903A1 (en) * 2020-05-03 2021-11-11 Yaacobi Amnon Method and system for controlling the temperature of an engine
DE102021115936A1 (de) * 2020-07-08 2022-01-13 Transportation Ip Holdings, Llc Kolbenkühldüse
USD965029S1 (en) * 2020-09-11 2022-09-27 Transportation Ip Holdings, Llc Piston cooling jet
DE102022105567A1 (de) 2022-03-09 2023-09-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einspritzventil und Elektromaschine mit einem Einspritzventil

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Publication number Priority date Publication date Assignee Title
DE2141518A1 (de) * 1971-08-19 1973-02-22 Kloeckner Humboldt Deutz Ag Hubkolbenbrennkraftmaschine mit innerer kuehlung der arbeitskolben durch schmieroel
EP0460299A1 (de) * 1990-06-08 1991-12-11 Gustav Wahler GmbH u. Co Drucksteuerventil, insbesondere für Ölspritzdüsen für Brennkraftmaschinen
EP0682175A1 (de) * 1994-05-10 1995-11-15 Bontaz Centre Spritzdüse für Kolbenkühlung für eine Brennkraftmaschine
JPH07317519A (ja) 1994-05-20 1995-12-05 Unisia Jecs Corp 内燃機関における潤滑・冷却装置
EP0947285A1 (de) * 1998-03-31 1999-10-06 Senior Engineering Investments AG Vorrichtung mit Spritzrohr für Fahrzeugmotor und Verfahren zu ihrer Herstellung

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US2800119A (en) * 1955-05-05 1957-07-23 Maschf Augsburg Nuernberg Ag Arrangement for cooling the piston of internal combustion engines
CN2272493Y (zh) * 1996-05-22 1998-01-14 杭州汽车发动机厂 四缸柴油机用活塞冷却装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141518A1 (de) * 1971-08-19 1973-02-22 Kloeckner Humboldt Deutz Ag Hubkolbenbrennkraftmaschine mit innerer kuehlung der arbeitskolben durch schmieroel
EP0460299A1 (de) * 1990-06-08 1991-12-11 Gustav Wahler GmbH u. Co Drucksteuerventil, insbesondere für Ölspritzdüsen für Brennkraftmaschinen
EP0682175A1 (de) * 1994-05-10 1995-11-15 Bontaz Centre Spritzdüse für Kolbenkühlung für eine Brennkraftmaschine
JPH07317519A (ja) 1994-05-20 1995-12-05 Unisia Jecs Corp 内燃機関における潤滑・冷却装置
EP0947285A1 (de) * 1998-03-31 1999-10-06 Senior Engineering Investments AG Vorrichtung mit Spritzrohr für Fahrzeugmotor und Verfahren zu ihrer Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844002A1 (fr) * 2002-09-02 2004-03-05 Bontaz Centre Sa Gicleur a projections multiples pour refroidissement de moteur, et moteurs equipes de tels gicleurs
US6895905B2 (en) 2002-09-02 2005-05-24 Bontaz Centre Multiple spray engine cooling nozzle and engines equipped with such nozzles
FR2885170A1 (fr) * 2005-05-02 2006-11-03 Bontaz Ct Sa Clapet a fuite controlee pour gicleur de refroidissement de piston
EP1728981A2 (de) * 2005-05-02 2006-12-06 Bontaz Centre Drucksteuerventil für eine Kolbenkühlungsdüse
US7350484B2 (en) 2005-05-02 2008-04-01 Bontaz Centre Controlled leakage valve for piston cooling nozzle
EP1728981A3 (de) * 2005-05-02 2008-08-20 Bontaz Centre Drucksteuerventil für eine Kolbenkühlungsdüse
EP1980729A1 (de) 2007-03-16 2008-10-15 Bontaz Centre Kühlungseinspritzdüse mit einer Klappe
US7559296B2 (en) 2007-03-16 2009-07-14 Bontaz Centre Cooling sprayer with valve
EP2282089A1 (de) 2009-08-05 2011-02-09 HAWE Hydraulik SE Hydraulikventil
USD921044S1 (en) * 2019-08-02 2021-06-01 Transportation Ip Holdings, Llc Piston cooling apparatus
USD928201S1 (en) * 2019-08-02 2021-08-17 Transportation Ip Holdings, Llc Piston cooling apparatus

Also Published As

Publication number Publication date
BR0202521A (pt) 2003-05-13
DE60214626T2 (de) 2007-10-04
US6672262B2 (en) 2004-01-06
ATE339605T1 (de) 2006-10-15
CN100404812C (zh) 2008-07-23
FR2827009A1 (fr) 2003-01-10
FR2827009B1 (fr) 2003-12-12
EP1273774B1 (de) 2006-09-13
BR0202521B1 (pt) 2011-03-09
DE60214626D1 (de) 2006-10-26
ES2271205T3 (es) 2007-04-16
PT1273774E (pt) 2007-01-31
CN1395031A (zh) 2003-02-05
US20030005893A1 (en) 2003-01-09

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