EP0785344B1 - Aufsteckbare Kühlungsöldüse - Google Patents

Aufsteckbare Kühlungsöldüse Download PDF

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Publication number
EP0785344B1
EP0785344B1 EP97420004A EP97420004A EP0785344B1 EP 0785344 B1 EP0785344 B1 EP 0785344B1 EP 97420004 A EP97420004 A EP 97420004A EP 97420004 A EP97420004 A EP 97420004A EP 0785344 B1 EP0785344 B1 EP 0785344B1
Authority
EP
European Patent Office
Prior art keywords
spray nozzle
cooling
sleeve
conduit
nozzle body
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.)
Expired - Lifetime
Application number
EP97420004A
Other languages
English (en)
French (fr)
Other versions
EP0785344A1 (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
Original Assignee
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
Application filed by Bontaz Centre SA filed Critical Bontaz Centre SA
Publication of EP0785344A1 publication Critical patent/EP0785344A1/de
Application granted granted Critical
Publication of EP0785344B1 publication Critical patent/EP0785344B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • Piston cooling nozzles for engine internal combustion are used to project a fluid cooling such as oil against the piston bottom, i.e. against the piston face outside the explosion chamber, or in a piston gallery.
  • Piston cooling jets usually used are attachments, fixed on the crankcase and communicating with a cooling fluid supply orifice.
  • the nozzle position must be determined precisely, to determine precisely the impact of the coolant jet on the bottom piston or in the piston gallery.
  • a known technique consists in providing a one-piece, limited nozzle body by a bearing face and by an opposite fixing face, provided with a axial drilling intended to be crossed by a screw-feed valve fluid and fixing.
  • the axial hole communicates with a hole transverse connected to a fluid outlet injection pipe of cooling.
  • the valve screw is shaped and adapted to maintain the sprinkler body supported by its bearing face against the peripheral zone a fluid supply orifice formed in the crankcase wall, and to transmit coolant to the borehole inlet transverse.
  • the valve plug screws into a tapped end portion a cooling pipe opening out through the supply orifice fluid.
  • Centering and rotation locking means allow position the nozzle body in the engine cylinder.
  • these centering and blocking means comprise a ball engaged in corresponding housings of the casing and the nozzle body.
  • Such a one-piece cooling nozzle body is metallic, and can be produced by machining a block of metal, or by molding followed by rework machining. In all cases, it is a complex part shape, leading to high production cost. Of plus, the necessary clearance between the valve plug and the threaded housing bore of motor receiving it introduces uncertainty into position final sprinkler and in the impact position of the fluid jet cooling on the piston bottom. And the means of centering and locking in rotation significantly increase the volume and cost of manufacture of the nozzle.
  • the problem proposed by the present invention is to design a new screw-valve sprinkler structure for cooling piston which can be produced in a much less expensive way than the known structures, while fulfilling all of the functions of centering and locking in rotation for precise positioning of the nozzle in the engine cylinder, and while increasing the precision orientation and reproducibility of the coolant jet projected onto the bottom of the piston.
  • the piston cooling nozzle body has a complex shape intended to fulfill multiple functions: certain parts of form are intended to fulfill the functions of centering and locking in rotation of the nozzle body in the engine cylinder; other parts of form are intended to fulfill the conduction function of the fluid of cooling and sealing function between the nozzle body and the crankcase wall, as well as the training and direction of the coolant jet.
  • the idea is to ensure centering and locking functions in rotation by the nozzle parts ensuring the functions of fluid conduction and sealing.
  • a piston cooling jet for a motor with internal combustion comprises the features of claim 1.
  • the external surface of the sleeve has a knurled portion with straight knurling, or knurling cross.
  • a nozzle 1 piston cooling is an attachment on the wall of cylinder housing 2, inside the engine, shaped to take coolant circulating in a pipe of cooling 3 and to project the coolant into the engine cylinder against the bottom 4 of the piston 5 that is to say against the face piston which is outside the explosion chamber 6.
  • the nozzle 1 comprises a nozzle body 7 pierced with a channel axial 8 communicating with a transverse bore 9 connected to a conduit coolant outlet injection 10.
  • the coolant outlet injection pipe 10 is a bent tube, one end 11 of which is added in the bore transverse 9 of the nozzle body 7, and the other end 12 of which is towards the piston 5.
  • piston 5 is shown in its position operating extreme lower, and the fluid jet of cooling is illustrated by the dashed line 13.
  • the fluid jet of cooling is illustrated by the dashed line 13.
  • Figures 1 to 3 illustrate on a larger scale the nozzle 1 of Figure 4.
  • the coolant outlet injection pipe 10 includes two opposite side faces of reference 18 and 19, visible on the Figure 3, formed by the side faces of a straight portion 28 of the conduit 10 to be suitably shaped to constitute reference faces.
  • These reference lateral faces 18, 19 can cooperate with positioning stops 20 and 21 of a fitting tool, both during the bending of the conduit 10 during its manufacture and during the positioning of nozzle 1 in the engine.
  • Positioning stops 20 and 21 bear at the outlet of the conduit 10 against the faces lateral reference 18 and 19, leaving a minimum clearance. We can thus achieving better positioning reproducibility of the impact of jet 13.
  • the nozzle body 7 comprises a cylindrical sleeve 14 of revolution, coaxial with the axial channel 8.
  • the outside diameter of the sleeve 14 is suitable for its forced introduction into the orifice fluid inlet 15 of the cylinder housing 2.
  • the supply port of fluid 15 is itself cylindrical of revolution.
  • the outer surface of the sleeve 14 includes a knurled portion 16, which can advantageously be an intermediate portion along the length L of the sleeve 14.
  • the knurled portion 16 when used, may include straight knurling. Alternatively, the knurled portion 16 may include a cross knurling, as illustrated in figure 2.
  • the outer surface of the sleeve 14 can include a smooth cylindrical portion 16 with tolerances allowing a tight fit.
  • the portion 16 of external surface of the sleeve 14 may include a protrusion made by deformation longitudinal or circular.
  • annular groove 22 which limits the length of the outer portion 16 of the sleeve engaging with the wall of the fluid supply orifice 15.
  • the nozzle body 7 is devoid of any other means ensuring the attachment of the nozzle in the housing cylinder 2, and ensuring its blocking in rotation about its axis.
  • These two fixing and rotation blocking functions are provided by the sleeve 14 forcibly engaged in the fluid supply orifice 15 of the casing of cylinder 2.
  • the adaptation of the sleeve 14 in the orifice fluid inlet 15, and its guidance by the positioning stops 20 and 21, make it possible to improve the positioning accuracy of the nozzle, by the fact that no play is left between the sleeve 14 and the orifice fluid supply 15, and by the fact that the guidance is the same during of the two operations of final forming of the conduit 10 and of insertion of the nozzle 1 in the engine.
  • the end of the sleeve 14 has a conical chamfer 17, adapted to facilitate penetration into the fluid supply orifice 15, limiting the risk of damage to the wall of the supply orifice fluid 15 and facilitating assembly.
  • the presence of the force-fitted part 16 ensures great mechanical rigidity of the nozzle assembly in the cylinder housing 2, while ensuring a sufficient seal to prevent the exit of coolant between the sleeve 14 and the supply port of fluid 15.
  • An internal combustion engine can thus include advantageously cooling nozzles 1 according to the invention, such as described above, fixed in the piston chamber (s) and adapted to each project the cooling fluid in a jet concentrated on the bottom 4 of a piston 5.

Claims (8)

  1. Kühldüse (1) für einen Kolben (5) eines Motors mit innerer Verbrennung, mit einem Düsenkörper (7), der von einem axialen Kanal (8) durchsetzt ist, welcher mit einer transversalen Durchgangsöffnung (9) in Verbindung steht, die mit einer Injektionsleitung (10) zum Austritt eines Kühlfluides verbunden ist, deren eines Ende (11) in der transversalen Durchgangsöffnung gehalten ist, wobei der Düsenkörper (7) zur Befestigung an der Gehäusewand des Zylinders (2) angepaßt ist und zum dichten Verbinden des axialen Kanals (8) mit einer Fluidleitöffnung (15) zur Einleitung von Kühlfluid in die Düse (1), mit Mitteln zum Zentrieren und zum Drehsperren zum Positionieren des Düsenkörpers (7) in einem Zylinder des Motors, dadurch gekennzeichnet, daß:
    der Düsenkörper (7) eine kreiszylindrische Muffe (14) aufweist, die koaxial zum axialen Kanal (8) ist, wobei der Außendurchmesser der Muffe (14) für ihre Einführung unter Kraft in die Fluidleitöffnung (15), die selbst kreiszylindrisch ist, angepaßt ist,
    die Injektionsleitung (10) zum Austritt von Kühlfluid direkt angrenzend an den Düsenkörper (7) einen geradlinigen, zylindrischen Leitungsabschnitt (28) aufweist, dessen Seitenflächen zwei gegenüberliegende Referenzseitenflächen (18, 19) bilden, die zum Bilden von Referenzflächen, die mit Positionierungsanschlägen zusammenwirken können, zum gleichzeitigen Biegen des Kanals (10) und zur Positionierung der Düse (1) im Motor ausgebildet sind.
  2. Kühldüse nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Oberfläche der Muffe (14) einen gerändelten Abschnitt (16) mit gerader Rändelung aufweist.
  3. Kühldüse nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Oberfläche der Muffe (14) einen gerändelten Abschnitt (16) mit Kreuzrändelung aufweist.
  4. Kühldüse nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Oberfläche der Muffe (14) einen innerhalb der eine Presspassung ermöglichenden Toleranzen glatten zylindrischen Abschnitt (16) aufweist.
  5. Kühldüse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die äußere Oberfläche der Muffe (14) an ihrer Basis eine ringförmige Rille (22) aufweist, die die Länge der mit der Wand der Fluidleitöffnung (15) in Verbindung stehenden Muffe begrenzt.
  6. Motor mit innerer Verbrennung, der Kühldüsen (1) nach einem der Ansprüche 1 bis 5 aufweist, die in dem Kolbenraum oder den Kolbenräumen befestigt und so ausgebildet ist bzw. sind, daß jede Düse die Kühlflüssigkeit in konzentriertem Strahl auf den Boden (4) eines Kolbens (5) spritzt.
  7. Verfahren zum Positionieren einer Kühldüse (1) für einen Kolben (5) eines Motors mit innerer Verbrennung, wobei die Kühldüse (1) einen Düsenkörper (7) und eine Injektionsleitung (10) zum Austritt eines Kühlfluides aufweist, wobei man bei dem Verfahren die Injektionsleitung (10) für den Austritt des Kühlfluides selbst als Positionsmarkierung verwendet.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Injektionsleitung (10) für den Austritt des Kühlfluides angrenzend an den Düsenkörper (7) einen geradlinigen, zylindrischen Leitungsabschnitt (28) aufweist, der zwei gegenüberliegende Referenzseitenflächen (18, 19) aufweist, und daß man ein Einbauwerkzeug mit Positionieranschlägen (20, 21) verwendet, die am Ausgang der Leitung (10) gegen die seitlichen Referenzflächen (18, 19) unter einem kleinen minimalen Spiel zur Anlage kommen.
EP97420004A 1996-01-18 1997-01-08 Aufsteckbare Kühlungsöldüse Expired - Lifetime EP0785344B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9600698 1996-01-18
FR9600698A FR2743847B1 (fr) 1996-01-18 1996-01-18 Gicleur de refroidissement a emmanchement

Publications (2)

Publication Number Publication Date
EP0785344A1 EP0785344A1 (de) 1997-07-23
EP0785344B1 true EP0785344B1 (de) 2002-09-04

Family

ID=9488345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97420004A Expired - Lifetime EP0785344B1 (de) 1996-01-18 1997-01-08 Aufsteckbare Kühlungsöldüse

Country Status (7)

Country Link
EP (1) EP0785344B1 (de)
AT (1) ATE223557T1 (de)
DE (2) DE69715055T2 (de)
ES (1) ES2183109T3 (de)
FR (1) FR2743847B1 (de)
HK (1) HK1001410A1 (de)
PT (1) PT785344E (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1653060A1 (de) 2004-10-08 2006-05-03 Dr.Ing. H.C. F. Porsche Aktiengesellschaft Spritzdüse zur Kühlung eines Kolbens einer Brennkraftmaschine
DE102005006439B4 (de) * 2005-02-12 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Spritzdüse zur Kühlung eines Kolbens einer Brennkraftmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869641B1 (fr) * 2004-04-29 2006-07-14 Pretto Alain De Gicleur de refroidissement d'un point chaud d'un piston de moteur de vehicule automobile ou analogue
DE102011077506A1 (de) * 2011-06-14 2012-12-20 Bayerische Motoren Werke Aktiengesellschaft Schraubverbindung für eine Ölspritzdüse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991769A (en) * 1959-04-27 1961-07-11 Gen Motors Corp Piston and piston cooling means
GB1475181A (en) * 1974-02-06 1977-06-01 Perkins Engines Ltd Reciprocating engine having piston oil cooling
DE2532132A1 (de) * 1975-07-18 1977-02-03 Kloeckner Humboldt Deutz Ag Kuehloelversorgung der kolben von hubkolben-brennkraftmaschinen
CS234514B1 (en) 1983-06-22 1985-04-16 Zdenek Kudelka Equipment for piston spraying by oil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1653060A1 (de) 2004-10-08 2006-05-03 Dr.Ing. H.C. F. Porsche Aktiengesellschaft Spritzdüse zur Kühlung eines Kolbens einer Brennkraftmaschine
DE102004049174B4 (de) * 2004-10-08 2014-11-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Spritzdüse zur Kühlung eines Kolbens einer Brennkraftmaschine
DE102005006439B4 (de) * 2005-02-12 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Spritzdüse zur Kühlung eines Kolbens einer Brennkraftmaschine

Also Published As

Publication number Publication date
FR2743847B1 (fr) 1998-02-27
ATE223557T1 (de) 2002-09-15
EP0785344A1 (de) 1997-07-23
DE69715055D1 (de) 2002-10-10
PT785344E (pt) 2003-01-31
DE69715055T2 (de) 2003-04-30
FR2743847A1 (fr) 1997-07-25
ES2183109T3 (es) 2003-03-16
DE785344T1 (de) 1998-01-29
HK1001410A1 (en) 1998-06-19

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