EP1529935B1 - Düse für Kolbenkühlung mit verminderter Zwischenachse - Google Patents

Düse für Kolbenkühlung mit verminderter Zwischenachse Download PDF

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Publication number
EP1529935B1
EP1529935B1 EP04356176A EP04356176A EP1529935B1 EP 1529935 B1 EP1529935 B1 EP 1529935B1 EP 04356176 A EP04356176 A EP 04356176A EP 04356176 A EP04356176 A EP 04356176A EP 1529935 B1 EP1529935 B1 EP 1529935B1
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EP
European Patent Office
Prior art keywords
nozzle body
nozzle
peripheral wall
axis
transverse
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.)
Active
Application number
EP04356176A
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English (en)
French (fr)
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EP1529935A1 (de
Inventor
Yves 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
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Publication date
Application filed by Bontaz Centre SA filed Critical Bontaz Centre SA
Publication of EP1529935A1 publication Critical patent/EP1529935A1/de
Application granted granted Critical
Publication of EP1529935B1 publication Critical patent/EP1529935B1/de
Anticipated expiration legal-status Critical
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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

Definitions

  • the present invention relates to the piston cooling nozzles for an internal combustion engine, used to project a cooling fluid such as oil against the piston bottom, that is to say against the piston face external to the piston. explosion chamber.
  • the piston cooling nozzles usually used are inserts attached to the crankcase and communicating with a coolant supply port.
  • the position of the nozzle must be accurately determined to accurately determine the impact of the coolant jet on the piston bottom.
  • Piston cooling nozzles for an internal combustion engine comprising a generally cylindrical peripheral wall nozzle body surrounding an axial bore containing a valve means.
  • the peripheral wall is traversed by a transverse bore communicating with the axial bore and connected to a tube of cooling fluid outlet conduit.
  • the nozzle body has a cylindrical portion shaped for its introduction into a fluid supply port of the engine cylinder housing.
  • a first solution consists in providing a nozzle having a coaxial screw-valve which is screwed into a threaded end portion of the fluid supply pipe. An attached transverse plate blocks the nozzle in rotation.
  • a second solution usually used for fixing the nozzle on the engine cylinder housing consists in providing a transverse fixing plate, having a first hole in which is fixed the nozzle body, and having a second hole offset laterally opposite the transverse bore, for the passage of a screw fixing the nozzle on the engine cylinder housing.
  • This second solution is simpler to implement, but it has the disadvantage of a sometimes excessive congestion.
  • the peripheral wall of the nozzle body must be sufficiently thick for the axial bore to effectively retain the coolant outlet conduit.
  • the mounting screw must be of sufficient diameter to ensure sufficient clamping of the mounting plate on the engine cylinder housing, avoiding any risk of detachment or vibration.
  • the problem proposed by the present invention is thus to design a new piston cooling nozzle structure, the fixing of which is carried out by a transverse fixing plate, the size of the transverse fixing plate is reduced, and whose between the axis of the fixing screw and the axis of the nozzle body is also reduced.
  • the aim is to make it possible to adapt such nozzles in engines having a reduced space for fixing the cooling nozzle.
  • the object of the invention is, simultaneously, to ensure correct operation and reliability of the piston cooling nozzle, and in particular a correct retention of the cooling fluid outlet duct and of the entire nozzle itself.
  • the external recess in the diametrically opposite portion of the peripheral wall makes it possible to bring the axis of the nozzle body closer to the axis of the fixing screw, while allowing the operation of the fastening screw by a clamping tool such as than a robot arm end.
  • Another advantage is that the outer recess provides relief of the piston cooling nozzle, which is favorable in the current search for engine performance.
  • the inter-axis of the first and second holes of the transverse fixing plate is just sufficient to allow the engagement and rotation of a screwing tool on the fixing screw head without contact with the peripheral wall of the jet body.
  • the external recess is a flat parallel to the axis of the nozzle body.
  • the external recess is a concave cylindrical surface with an axis parallel to the axis of the nozzle body and coaxial with the axis of the fixing screw.
  • This latter embodiment is particularly suitable for a screwing system in which the screwing tool is the end of a robot arm with cylindrical outer contour of revolution and inner contour adapted to grip the screw head.
  • the nozzle comprises a nozzle body 1 with a wall generally cylindrical peripheral axis II and surrounding an axial bore 2 containing a valve means 3.
  • the valve means 3 comprises a fixing screw 3a whose axial rod 3b guides a compression spring 3c which pushes a closure ball 3d against a seat 3e of the nozzle body 1.
  • the ball 3d can close the axial bore 2 as the cooling fluid pressure at the inlet 2a of the axial bore 2 does not exceed a determined threshold corresponding to the thrust force of the spring 3b.
  • the peripheral wall 1a of the nozzle body 1 is traversed by a transverse bore 4 communicating with the axial bore 2 and connected to a cooling fluid outlet duct 5.
  • the nozzle body 1 comprises a cylindrical input portion 1b, coaxial axis I-I, shaped for its introduction into a fluid supply port of the engine cylinder housing.
  • a transverse fixing plate 6 is associated with the nozzle body 1 to ensure its attachment to the engine cylinder housing.
  • the transverse fixing plate 6 comprises a first hole 6a in which is fixed the nozzle body 1, by welding or fitting, and comprises a second hole 6b offset laterally opposite the transverse bore 4, for the passage of a fixing screw 7 of the nozzle on the engine cylinder casing.
  • the inter-axis E1 between the axis II of the nozzle body 1 and the axis II-II of the fixing screw 7 must be sufficient to allow a radial clearance between the nozzle body 1 and a screwing tool that is just engaged on the head of the fastening screw 7. This is the reason why the inter-axis E1 must be wide, which makes it necessary to dimension the plate 6 accordingly.
  • the peripheral wall 1 has a thickness T which is greater than or equal to the diameter D of the transverse bore 4.
  • the cooling fluid outlet duct 5 may be an attached tube, force-fitted by its end in the transverse bore 4, which is sufficient to ensure effective maintenance of the fluid outlet conduit 5.
  • the peripheral wall 1a is thinner due to the presence of an external recess 1d with respect to the second hole 6b of the transverse fixing plate 6.
  • a thickness of the portion 1c of peripheral wall is kept just sufficient for the mechanical stresses to be borne, and the external recess 1d makes it possible to bring the II-II axis of the fixing screw 7.
  • the inter-axis E2 of the first hole 6a and second hole 6b of the transverse fixing plate 6, or between-axis between the nozzle body 1 and the fixing screw 7, is just sufficient to allow the engagement and the rotation of a screwing tool 8 on the head of the fixing screw 7 without contact with the peripheral wall 1a of the nozzle body 1.
  • a functional clearance is left between the screwing tool 8 and the nozzle body 1 which facilitates the movement of the screwing tool 8 during its adaptation and removal relative to the fixing screw 7.
  • the external recess 1d is a concave cylindrical surface of axis parallel to the axis II of the nozzle body 1 and coaxial with the axis II-II of the fixing screw 7.
  • the screwing tool 8 as illustrated is the end of a robot arm with a cylindrical outer contour of revolution and an inner contour adapted to grip the screw head 7.
  • the outer recess 1d is a flat parallel to the axis II of the nozzle body 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (5)

  1. Düse zum Kühlen des Kolbens eines Motors mit innerer Verbrennung:
    - mit einem Düsenkörper (1) mit einer Umfangswand (1a), die eine axiale Bohrung (2) umgibt, die ein Ventilmittel (3) enthält, wobei die Umfangswand (1a) von einer quer verlaufenden Bohrung (4) durchquert wird, die mit der axialen Bohrung (2) in Verbindung steht und mit einer Ausgangsleistung (5) für Kühlflussigkeit verbunden ist, wobei der Düsenkörper (1) einen zylindrischen Eintrittsabschnitt (1b) aufweist, der zu seiner Einführung in eine Zuführöffnung für Fluid des Gehäuses des Zylindermotors angepasst ist,
    - mit einer quer verlaufenden Befestigungsplatte (6), die ein erstes Loch (6a) aufweist, in dem der Düsenkörper (1) befestigt ist und ein zweites Loch (6b), das seitlich entgegengesetzt zur quer verlaufenden Bohrung (4) versetzt angeordnet ist, für den Durchdritt einer Befestigungsschraube (7) der Düse am Gehäuse des Zylindermotors,
    dadurch gekennzeichnet, dass:
    - die Umfangswand (1a) zumindest rings um die quer verlaufenden Bohrung (4) verdickt ist, wobei ihre Dicke T grösser oder gleich dem Durchmesser (D) der quer verlaufenden Bohrung (4) ist,
    - die Umfangswand (1a) in ihrem Abschnitt (1c), der der quer verlaufenden Bohrung (4) diametral gegenüberliegt, dünner ist, aufgrund der Anwesenheit einer externen Aussparung (1d) in Bezug auf das zweite Loch (6b) der quer verlaufenden Befestigungsplatte (6).
  2. Düse zum Kühlen des Kolbens gemäss Anspruch 1, dadurch gekennzeichnet, dass der Achsabstand (E2) des ersten und des zweiten Loches (6a, 6b) der quer verlaufenden Befestigungsplatte (6) gerade ausreichend ist, um den Eingriff und die Drehung eines Verschraubungswerkzeuges (8) an dem Kopf der Befestigungsschraube (7) ohne Kontakt mit der Umfangswand (1a) des Düsenkörpers (1) zu gestatten.
  3. Düse zum Kühlen des Kolbens nach Anspruch 2, dadurch gekennzeichnet, dass das Verschraubungswerkzeug (8) die Extremität eines Roboterarmes mit einer äusseren Kontur eines Rotationszylinders und mit einer inneren Kontur ist, die zum Ergreifen des Kopfes der Schraube (7) angepasst ist.
  4. Düse zum Kühlen des Kolbens nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die externe Ausnehmung (1d) eine Abflachung ist, die parallel zur Achse (I-I) des Düsenkörpers (1) ist.
  5. Düse zum Kühlen des Kolbens nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die externe Ausnehmung (1d) eine zylindrische Fläche ist, die konkav zu einer Achse ist, die parallel zur Achse (I-I) des Düsenkörpers (1) ist und koaxial zu der Achse (II-II) der Befestigungsschraube (7).
EP04356176A 2003-11-04 2004-11-03 Düse für Kolbenkühlung mit verminderter Zwischenachse Active EP1529935B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313248 2003-11-04
FR0313248A FR2861804B1 (fr) 2003-11-04 2003-11-04 Gicleur de refroidissement de piston a entre-axe reduit

Publications (2)

Publication Number Publication Date
EP1529935A1 EP1529935A1 (de) 2005-05-11
EP1529935B1 true EP1529935B1 (de) 2011-06-01

Family

ID=34429976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04356176A Active EP1529935B1 (de) 2003-11-04 2004-11-03 Düse für Kolbenkühlung mit verminderter Zwischenachse

Country Status (7)

Country Link
US (1) US7104225B2 (de)
EP (1) EP1529935B1 (de)
CN (1) CN1287072C (de)
AT (1) ATE511599T1 (de)
AU (1) AU2004226948B2 (de)
BR (1) BRPI0404650A (de)
FR (1) FR2861804B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9074516B2 (en) 2008-09-09 2015-07-07 Bontaz Centre R&D Device for controlling supply of a system with a fluid

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8397749B2 (en) * 2007-09-07 2013-03-19 Metaldyne Company Llc Piston cooling jet with tracking ball orifice
CN101886570B (zh) * 2010-06-02 2012-02-29 奇瑞汽车股份有限公司 一种活塞冷却喷嘴结构
FR3004489B1 (fr) 2013-04-11 2017-04-28 Bontaz Centre R & D Dispositif de refroidissement pour moteur a combustion interne a encombrement reduit et procede de fabrication d'un tel dispositif
CN104533588A (zh) * 2014-12-26 2015-04-22 山东华源莱动内燃机有限公司 活塞冷却喷嘴
GB201519640D0 (en) * 2015-11-06 2015-12-23 Gm Global Tech Operations Inc Piston cooling jet for an internal combustion engine
FR3109608B1 (fr) * 2020-04-22 2023-01-13 Bontaz Centre R & D Gicleur de refroidissement de piston double jet en materiau plastique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938431A1 (de) * 1979-09-22 1981-03-26 Daimler-Benz Aktiengesellschaft, 70567 Stuttgart Einrichtung zur kolbenkuehlung fuer brennkraftmaschinen
US4995346A (en) * 1989-06-28 1991-02-26 Sharon Manufacturing Company Oil jet piston cooler
FR2719868B1 (fr) * 1994-05-10 1996-06-21 Bontaz Centre Gicleur de refroidissement de piston pour moteur à combustion interne.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9074516B2 (en) 2008-09-09 2015-07-07 Bontaz Centre R&D Device for controlling supply of a system with a fluid

Also Published As

Publication number Publication date
US7104225B2 (en) 2006-09-12
AU2004226948B2 (en) 2007-05-10
BRPI0404650A (pt) 2005-06-21
FR2861804A1 (fr) 2005-05-06
EP1529935A1 (de) 2005-05-11
US20050098122A1 (en) 2005-05-12
ATE511599T1 (de) 2011-06-15
CN1287072C (zh) 2006-11-29
CN1614206A (zh) 2005-05-11
AU2004226948A1 (en) 2005-05-19
FR2861804B1 (fr) 2006-01-20

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