EP1227237A1 - Zylinderkopf für eine Brennkraftmaschine mit einem Ventilierungskanal - Google Patents

Zylinderkopf für eine Brennkraftmaschine mit einem Ventilierungskanal Download PDF

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Publication number
EP1227237A1
EP1227237A1 EP02290066A EP02290066A EP1227237A1 EP 1227237 A1 EP1227237 A1 EP 1227237A1 EP 02290066 A EP02290066 A EP 02290066A EP 02290066 A EP02290066 A EP 02290066A EP 1227237 A1 EP1227237 A1 EP 1227237A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
channel
engine
core
opens
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
EP02290066A
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English (en)
French (fr)
Other versions
EP1227237B1 (de
Inventor
Stéphane Rizzo
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.)
Renault SAS
Original Assignee
Renault 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 Renault SA filed Critical Renault SA
Publication of EP1227237A1 publication Critical patent/EP1227237A1/de
Application granted granted Critical
Publication of EP1227237B1 publication Critical patent/EP1227237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers

Definitions

  • the invention relates to a cylinder head of a heat engine, especially for a motor vehicle.
  • the invention relates more particularly to a cylinder head heat engine, in particular for a motor vehicle, type which has a lower face intended to coincide with an upper face of an engine cylinder block and a portion upper which is intended to be capped by a cylinder head cover, of the type in which the upper part has a recess upper which is intended to receive actuating elements of engine valves and which opens into an upper face of the upper part, of the type in which the upper part comprises at least one surface for receiving an element of settling of gases contained under the cylinder head cover, and of the type which has at least one internal gas transport channel from an engine oil pan, a first of which end opens into the underside of the cylinder head and the second end opens into the upper part to feed the settling element.
  • the housing engine oil When the engine is running, the housing engine oil is slightly pressurized due to movement of pistons in cylinders. In order to maintain this pressure, undesirable, at a reduced level, the oil pan is set in communication with the air intake circuit.
  • a gas transport channel which opens into the oil pan above the oil level, connects said casing at the upper part of the cylinder head, arranged under the cylinder head cover, in which the elements are arranged actuating the engine valves.
  • This upper part of the cylinder head is itself connected to the intake manifold.
  • the air charged with oil vapors can thus be decanted, in particular by means of a settling element containing baffles, in the upper part of the breech before being discharged into the intake manifold.
  • This configuration allows the oil to condense on the walls its baffles of the settling element, before that it does not return to the vehicle lubrication circuit.
  • the channel gas transmission system also known as the gas channel "blow-by" is an internal channel, produced by molding, which crosses the cylinder head material and which opens directly into the upper recess which is intended to receive elements actuating engine valves.
  • this channel is produced by adding to the nucleus of the recess a protrusion or "horn" which extends to the underside of the cylinder head.
  • the invention proposes a internal routing channel, produced by molding, which crosses the cylinder head material, and which opens above the upper recess which is intended to receive elements actuation of engine valves, directly at the settling element.
  • the invention provides a cylinder head of the type described previously, characterized in that the internal channel is produced by molding in the cylinder head material so that its second end opens into the receiving surface in sight of a feed orifice for the settling element.
  • the invention also provides a method of molding a cylinder head of the type described above of the type in which, at during a first stage of constitution of a mold of the cylinder head, we adjust to each other a lower formwork, a pair of lower side forms, one pair of forms upper sides, and an upper formwork between which arranges at least one intake core, one exhaust core and a nucleus of water, characterized in that, in addition, the minus an internal channel core between the lower formwork and the upper formwork, a lower end of the channel core internal being received in a recess of a side formwork lower and upper end of the inner channel core being received in a recess of the upper formwork.
  • FIG. 1 There is shown in Figure 1 a cylinder head 10 "naked", that is to say devoid of its accessories, which is intended to equip a heat engine, especially of a motor vehicle.
  • the cylinder head 10 has a face lower 12 which is intended to coincide with a face upper part of a cylinder block (not shown) of the engine and a upper part 14 which is intended to be capped by a cylinder head cover.
  • the upper part 14 of the cylinder head is intended to be capped by a cylinder head cover 16 which is shown in Figure 3.
  • the upper part 14 of the cylinder head 10 has an upper recess 18 which is intended to receive actuating elements (not shown) of engine valves and which opens into an upper face 20 of the upper part 14.
  • the part upper 14 comprises in known manner at least one surface 22 for receiving an element 24 for settling the gases contained under the cylinder head cover 16.
  • Element 24 is intended to be interposed between the cylinder head 10 and the cylinder head cover 16.
  • a lower face 26 of the element 24 is intended to be fixed on the upper face 20 of the cylinder head 10, which is advantageously confused with the surface 22 of reception, and an upper face 28 of the element 24 includes anchor points for a lower face 30 of the cylinder head cover 16.
  • the cylinder head 10 has known manner at least one internal channel 32 for routing gases from an engine oil pan (not shown), a first end 34 of which opens into the lower face 12 of the cylinder head 10, and the second end 36 of which opens out in the upper part 14 to supply the element 24 with decanting.
  • the internal channel 32 is produced by molding in the cylinder head material 10 so that its second end 36 opens into the surface of reception 22 opposite an orifice 38 for supplying the element Decantation 24.
  • the internal channel 32 is advantageously arranged substantially near a side edge 40 of the cylinder head 10 to form a stiffening box thereof.
  • the internal walls of the internal channel 32 allow to homogenize the internal constraints which are exerted in the cylinder head material 10, so that the housing of stiffening formed by the internal channel 32 makes it possible to design a cylinder head 10 which does not require the addition of material for the purposes reinforcement.
  • the integration of internal channel 32 into the cylinder head material therefore optimizes the quantity of material used to manufacture the cylinder head 10, and therefore to propose a light cylinder head 10 and a great rigidity.
  • the channel 32 is arranged in a particular arrangement in the material of the cylinder head 10.
  • an upper part 42 of the channel 32 is attached to the upper recess 18, and on the other hand, the channel 32 travels through the cylinder head material 10 at least between a water circulation conduit 44 and a water circulation conduit 46 intake gas.
  • channel 32 could run in the cylinder head material 10 at least between a duct 44 of water circulation and a gas circulation conduit 47 exhaust.
  • This particular arrangement makes it possible to propose a channel 32 the cross-section of which is not constant so that the thicknesses walls 48, 50, and 52 which respectively separate the channel from the recess, the channel of the water circulation duct, and the channel of the gas circulation duct, are substantially constant.
  • This configuration is particularly advantageous since it allows, during the molding of the cylinder head 10 to promote uniform cooling and shrinking of said walls 48, 50, and 52 of the cylinder head 10, guarantees of absence of defects in the cylinder head 10 and a high rigidity thereof in the vicinity of the channel internal 32.
  • the cylinder head 10 has at least as many internal channels 32 as the associated engine has combustion chambers (not shown).
  • This configuration shown in Figure 2 on which we can see the second ends 36 of the channels internal 32 which open into the receiving surface 22, provides a cylinder head 10 comprising several stiffening boxes, and therefore have a cylinder head 10 uniformly high rigidity.
  • the surfaces 22 for receiving the element 24 of decantation form fixing surfaces for a load-bearing element at least one engine camshaft.
  • the element carrying at least one camshaft is integrated in element 24 of decanting.
  • the settling element 24, which is shown more particularly in Figures 3 and 4, has the shape of a beam substantially parallelepipedic, the lower face 30 of which regular intervals of the caps 54 each intended to form half a bearing for the engine camshaft. Element 24 is crossed at regular intervals by conduits 56 which are intended to adapt opposite channels 32 of the cylinder head for ensure the circulation of gases from the oil pan to one side upper 58 of element 24.
  • the upper face 58 carries baffles 60 substantially vertical, complementary to baffles 62 of the cylinder head cover 16, so as to delimit between element 24 and the cylinder head covers of the chambers 64 which communicate with each other and allow the condensation of the oil contained in the gases coming from the crankcase before redirecting it to the recess 18 via the minus an opening 65.
  • the decantation element 24 ensures the functions for rotationally guiding the camshaft and decantation of gases from the engine oil pan.
  • the advantage of such an element 24 is, because it comprises all the camshaft bearing caps arranged in a alignment whose defect is very small, that it provides guidance precise camshaft.
  • the invention also provides a molding process for a cylinder head 10 as described above.
  • a formwork is adjusted to each other in a known manner lower 68, a pair of lower side forms 70, a pair of upper side forms 72, and one form upper 74 which are intended to delimit the outer walls of cylinder head 12 after casting.
  • At least one intake core 76 which is intended to form after casting the intake duct 46 of the cylinder head
  • an exhaust core 78 which is intended to form an exhaust duct after casting 47 of the cylinder head
  • a water core 82 which is intended to form after casting the water circulation conduit 44.
  • These nuclei 76, 78, 80 are in known manner made of agglomerated sand by through a polymeric binder and they are intended to be unchecked after formwork stripping.
  • the core 82 is also made of agglomerated sand via a polymeric binder.
  • a lower end 84 of the inner channel core 82 is received in a complementary recess 86 of the formwork 76 lower side and an upper end 88 of the core 82 of internal channel is received in a complementary recess 90 of the 74 upper formwork.
  • This configuration allows, during casting, to delimit simultaneously the walls of channel 32 and the orifices of its lower 34 and upper 36 ends while ensuring a satisfactory positioning of the channel 32 in the cylinder head 10. From the so, in a later step of rectifying a process machining of cylinder head 10, a simple rectification of the face upper 20 of cylinder head can be achieved without it necessary to deburr the holes in the lower ends 34 and upper 36 of the canal.
  • the invention therefore provides a cylinder head which is at a cost of reduced molding and great rigidity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP02290066A 2001-01-25 2002-01-11 Zylinderkopf für eine Brennkraftmaschine mit einem Ventilierungskanal Expired - Lifetime EP1227237B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0100984 2001-01-25
FR0100984A FR2819856B1 (fr) 2001-01-25 2001-01-25 Culasse de moteur thermique comportant un canal d'acheminement moule

Publications (2)

Publication Number Publication Date
EP1227237A1 true EP1227237A1 (de) 2002-07-31
EP1227237B1 EP1227237B1 (de) 2007-11-07

Family

ID=8859218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290066A Expired - Lifetime EP1227237B1 (de) 2001-01-25 2002-01-11 Zylinderkopf für eine Brennkraftmaschine mit einem Ventilierungskanal

Country Status (3)

Country Link
EP (1) EP1227237B1 (de)
DE (1) DE60223303T2 (de)
FR (1) FR2819856B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005024192A1 (de) * 2003-09-06 2005-03-17 Fev Motorentechnik Gmbh Mehrzylinder-kolbenbrennkraftmaschine mit ölabscheidung für abgesaugtes blow-by gas
FR2861430A1 (fr) * 2003-10-28 2005-04-29 Peugeot Citroen Automobiles Sa Dispositif constitue d'une culasse et de son couvercle montes sur le bloc moteur pour le deshuilage des gaz perdus issus de la combustion et de la compression.
US7814879B2 (en) 2008-04-23 2010-10-19 Techtronic Outdoor Products Technology Limited Monolithic block and valve train for a four-stroke engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454512A1 (de) * 1990-04-26 1991-10-30 Automobiles Peugeot Reinigungs- und Rezirkulationseinrichtung für die Durchblasgase einer Brennkraftmaschine und Brennkraftmaschine ausgerüstet mit dieser Einrichtung
DE19703770C1 (de) * 1997-02-01 1998-07-23 Daimler Benz Ag Entlüftungsvorrichtung mit integriertem Ölabscheider für ein Kurbelgehäuse einer Brennkraftmaschine
US5850823A (en) * 1996-11-29 1998-12-22 Suzuki Motor Corporation Blowby gas returning structure for engine
FR2774129A1 (fr) * 1998-01-23 1999-07-30 Renault Dispositif de reaspiration des gaz de carter d'un moteur a combustion interne
US6158408A (en) * 1997-06-04 2000-12-12 Vaw Mandl & Berger Gmbh Cylinder head and casting core for producing oil channels

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243270A (en) * 1978-07-31 1981-01-06 Fenton Company Wire basket wheel assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454512A1 (de) * 1990-04-26 1991-10-30 Automobiles Peugeot Reinigungs- und Rezirkulationseinrichtung für die Durchblasgase einer Brennkraftmaschine und Brennkraftmaschine ausgerüstet mit dieser Einrichtung
US5850823A (en) * 1996-11-29 1998-12-22 Suzuki Motor Corporation Blowby gas returning structure for engine
DE19703770C1 (de) * 1997-02-01 1998-07-23 Daimler Benz Ag Entlüftungsvorrichtung mit integriertem Ölabscheider für ein Kurbelgehäuse einer Brennkraftmaschine
US6158408A (en) * 1997-06-04 2000-12-12 Vaw Mandl & Berger Gmbh Cylinder head and casting core for producing oil channels
FR2774129A1 (fr) * 1998-01-23 1999-07-30 Renault Dispositif de reaspiration des gaz de carter d'un moteur a combustion interne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005024192A1 (de) * 2003-09-06 2005-03-17 Fev Motorentechnik Gmbh Mehrzylinder-kolbenbrennkraftmaschine mit ölabscheidung für abgesaugtes blow-by gas
FR2861430A1 (fr) * 2003-10-28 2005-04-29 Peugeot Citroen Automobiles Sa Dispositif constitue d'une culasse et de son couvercle montes sur le bloc moteur pour le deshuilage des gaz perdus issus de la combustion et de la compression.
EP1528244A1 (de) * 2003-10-28 2005-05-04 Peugeot Citroen Automobiles S.A. Vorrichtung bestehend aus einem Zylinderkopf und dessen Abdeckung, an den Zylinderblock angebracht, zur Ölabscheidung der Verbrennungs- und Verdichtungs- Leckgase
US7143754B2 (en) 2003-10-28 2006-12-05 Peugeot Citroen Automobiles S.A. Device comprising a cylinder head and its cover, mounted on the engine block, for de-oiling of waste gases from combustion and compression
US7814879B2 (en) 2008-04-23 2010-10-19 Techtronic Outdoor Products Technology Limited Monolithic block and valve train for a four-stroke engine

Also Published As

Publication number Publication date
DE60223303T2 (de) 2008-08-28
FR2819856A1 (fr) 2002-07-26
EP1227237B1 (de) 2007-11-07
FR2819856B1 (fr) 2003-04-25
DE60223303D1 (de) 2007-12-20

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