WO2005088111A1 - Culasse refroidie par eau pour un moteur a combustion interne - Google Patents

Culasse refroidie par eau pour un moteur a combustion interne Download PDF

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Publication number
WO2005088111A1
WO2005088111A1 PCT/EP2005/002345 EP2005002345W WO2005088111A1 WO 2005088111 A1 WO2005088111 A1 WO 2005088111A1 EP 2005002345 W EP2005002345 W EP 2005002345W WO 2005088111 A1 WO2005088111 A1 WO 2005088111A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
cooling
coolant
inlet
water
Prior art date
Application number
PCT/EP2005/002345
Other languages
German (de)
English (en)
Inventor
Jochen Betsch
Bernhard Jutz
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2005088111A1 publication Critical patent/WO2005088111A1/fr

Links

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
    • 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
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • 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
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
    • 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
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/024—Cooling cylinder heads
    • 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 
    • F02F2001/008—Stress problems, especially related to thermal stress

Definitions

  • the invention relates to a water-cooled cylinder head for a multi-cylinder internal combustion engine having a coolant space between a cylinder head floor and an overlying cylinder head roof, with the coolant space passing through the gas exchange channels emanating from valve openings within a combustion chamber portion in the cylinder head floor and open out in side walls of the cylinder head, further with a cooling hole for each Combustion chamber section, which consists of two lying substantially within the plane of the cylinder head floor cooling bore sections, each extending from a side wall of the cylinder head in the direction of combustion chamber center in a gas exchange channels limited land area and are interconnected in the web area and the inlet opening for coolant and an outlet opening for the passage of the coolant into the coolant space, according to the features of the preamble of claim 1.
  • a generic water-cooled cylinder head is known.
  • the V-shaped cooling bores are connected with their own inlet opening to separate transfer openings and open at their V Tip in a cooling channel, which extends between the gas exchange channels and then empties into the coolant space.
  • the transfer openings have additional flow bores from which the coolant can be directed to the injection nozzle housing or the outlet channels.
  • the disadvantage is that the entire amount of coolant is introduced exclusively through cooling holes in the coolant chamber of the cylinder head. Due to the limited cross sections of the cooling holes so that only a good cooling in certain local area is possible; but not a large-scale cooling throughout the coolant space. Such a cooling system is therefore only suitable for low-loaded and large-volume internal combustion engines.
  • a water-cooled cylinder head is known in which for cooling of each combustion chamber section X-shaped cooling holes extend from a side surface of the cylinder head from between the exhaust ports and approximately laterally in combustion chamber center between the exhaust and inlet channels. In this cooling system, cooling is also determined by the cross-section of the cooling holes.
  • the cooling of the cylinder head depends on the flow rate of coolant through the cooling holes. Since with regard to a compact design, the cross sections of the cooling holes, especially in the web area can not be chosen arbitrarily large, the cooling capacity is limited by a limited flow rate, or it is a larger pump power required by a higher To convey coolant quantity with a higher coolant pressure through the cooling holes.
  • the invention has for its object to make the cooling holes in the generic cylinder head such that optimum cooling of the land area between the gas exchange channels with low flow and high coolant flow rate is achieved.
  • the cooling holes according to the invention are used exclusively for cooling the web area between the gas exchange channels and arranged in the land area facilities, such as glow plugs and fuel injectors; while all remaining elements of the cylinder head are cooled separately therefrom by a main coolant amount.
  • the invention results in a single V-shaped cooling bore with a common inlet and outlet opening, which is space-saving due to its V-shape and therefore suitable for optimal cooling of the land area.
  • the exit opening can be located away from the land area in a zone of the coolant space at a low pressure level. Such a position of the outlet opening leads to an optimal pressure gradient between the inlet and the outlet opening, due to the relatively high flow • speeds in the cooling hole can be achieved, which also improves the cooling.
  • the coolant which has been cooled back in the cooler is normally conveyed into the coolant jacket of the cylinder housing.
  • the coolant enters an inlet side of the cylinder, flows around it and is then conveyed from the outlet side of the coolant jacket through at least one transfer opening in the cylinder head into the coolant space there. The transition into the cylinder head takes place mostly from the outlet side.
  • the cooling hole is arranged in the cylinder head floor on the inlet side.
  • the inlet opening communicates with the inlet side in the coolant jacket of the cylinder block, and thus coolant with a lower temperature than on the outlet side passes into the cooling hole, whereby the cooling effect is further improved.
  • a particularly high flow velocity in the cooling bore is achieved when the outlet opening opens into the coolant chamber at a distance from the web region outside the combustion chamber section on the inlet side.
  • FIG. 1 is a partial view of the cylinder head with the cooling bores according to the invention in a view of the cylinder head floor.
  • FIG. 2 shows the cooling bore section with the inlet opening in an enlarged sectional view from the cooling bore according to the section II-II from FIG. 1;
  • FIG. 1 is a partial view of the cylinder head with the cooling bores according to the invention in a view of the cylinder head floor.
  • FIG. 2 shows the cooling bore section with the inlet opening in an enlarged sectional view from the cooling bore according to the section II-II from FIG. 1;
  • the cylinder head 1 partially shown in the figures has a cylinder head bottom 2, which is bounded by housing walls, of which an end wall 3 and the two side walls 4 and 5 are shown. Together with the cylinder head base 2, the housing walls enclose a coolant space 6, which is separated from an overlying, not shown camshaft space by a cylinder head cover.
  • the cylinder head floor 2 contains combustion chamber sections 7, 8, which are marked by dash-dotted lines.
  • combustion chamber sections 7, 8 there are two inlet openings 9, 10 for the inlet valves, two outlet openings 11, 12 for the outlet valves, a central bore 13 for an injection injector or a spark plug, and a receiving bore 14 for, for example, a glow plug.
  • the valve openings within the combustion chamber sections 7, 8 have a position according to which the inlet openings 9, 10 are arranged on one side of a longitudinal central axis 15 and the outlet openings 11, 12 on the other side thereof.
  • outlet channels 18, 19 which pass through the coolant space 6 in the direction of the side walls 4, 5, and of which the inlet channels 16, 17 in the side wall 4 and outlet channels open in the side wall 5.
  • the cylinder head 1 rests on a cylinder housing 20 and covers with its combustion chamber sections the cylinders arranged in the cylinder housing, wherein FIG. 2 shows in detail how the combustion chamber section 7 covers a cylinder 21.
  • the cylinder 21 is surrounded by a coolant jacket 22, in which on an inlet side 22a coolant is conveyed from a cooler, which leaves after flowing around the cylinder 21 on an outlet side 22b the coolant jacket 22 through a transfer opening 23 in the cylinder head bottom 2 and into the coolant chamber 6 in Cylinder head 1 overflowed.
  • the transfer opening 23 is arranged in the cylinder head bottom 2 below the outlet channels 18, 19, which surround the combustion chamber section 7 on the outside as a curved slot at a distance. The same arrangement results for all other combustion chamber sections.
  • the coolant flows through the coolant chamber 6 substantially in the cylinder head transverse direction, thereby cooling the combustion chamber sections 7, 8 and all internals, including the web regions 24 lying between the inlet ports 16, 17 and the web regions 25 lying between the exhaust ports 18, 19 Approximately after the inlet openings 9, 10 flow around, the coolant flow changes direction and changes from a transverse flow into a longitudinal flow, so that in the areas of the coolant space 6 which is traversed by the inlet channels 16, 17, essentially a longitudinal flow prevails , In this case, the longitudinal flow is caused by the outlet opening, which on the opposite side of the transfer openings 23 of the coolant chamber 6 in the not further shown end face of the cylinder head. 1 is provided and through which the coolant leaves the cylinder head 1 in the direction of a radiator.
  • the main cooling of the cylinder head 1 is performed by the flowing through the transfer openings 23 in the coolant chamber 6 main coolant quantity. It is important that the highly loaded web portions 24 and 25 are cooled intensively to avoid cracking.
  • a V-shaped cooling bore 26 is proposed for optimum cooling of the web region 24.
  • the V-shaped cooling bore 26 consists of twodebohrungs- sections 26 a and 26 b, which are introduced from the side wall 4 in the plane of the cylinder head floor 2 extending.
  • the cooling bore sections 26a and 26b produced by drilling, for example, run at an angle to one another in such a way that they meet in the web region 24 between the inlet openings 9, 10 with a smallest possible distance from the receiving bore 14 in a point 27.
  • the cooling bore 26 is connected separately from the main coolant flow via an inlet opening 28 in the bore section 26a directly to the coolant jacket 22 on its inlet side 22a.
  • an outlet opening 29 is provided in the bore section 26b, via which the cooling bore 26 is connected to the coolant space 6 in the region of the inlet channels 16, 17 or the longitudinal flow that forms.
  • the coolant can flow through the cooling hole 26, the cooling hole sections are closed in the region of the side wall 4 by plugs to the outside.
  • the web region 24 is thus cooled separately from the main coolant flow by a coolant partial flow, which is branched off directly from the coolant jacket 22 and after flowing through the cooling bore 26 through the outlet opening 29 the main coolant flow in Coolant space 6 is mixed.
  • the branching off of the partial flow takes place on the inlet side 22a of the coolant jacket 22 and thus of an area in which coolant coming directly from the cooler is present, and thus has a lower temperature than the coolant flowing into the cooling chamber 6 on the outlet side 22b.
  • the web region 24 can be cooled with coolant, which has a lower temperature than the coolant flowing with the main cooling flow through the coolant chamber 6.
  • the flow rate of coolant through the cooling bore 26, which is dependent inter alia on the pressure difference between the inlet opening 28 and the outlet opening 29, is important for optimum cooling of the bridge area 24.
  • the inlet opening 28 lies in the region of the inlet side 22a and thus becomes influenced by the coolant pressure on the inlet side 22a. Since the coolant enters the cooling system on the inlet side 22a, there is a relatively high coolant pressure.
  • the outlet opening 29 has connection to the coolant space 6 in an outflow area, from which the coolant leaves the cooling system and in which a lower pressure level prevails. Thus, the inlet opening 28 and the outlet opening 29 is in areas of the cooling system, between which largely the largest pressure gradient is given. Due to these pressure conditions, a very high coolant throughput through the cooling bore 22 is achieved. Overall, this leads to optimum cooling of the web region 24 by conveying a very high coolant quantity with a relatively low coolant temperature through the cooling bore 22.
  • the arrangement cooling bore 28 is not limited to the cooling of the web portion 24, but it is any other use of the cooling hole for cooling the cylinder head 1 and parts thereof is conceivable.
  • the invention is not limited to the use of a V-shaped cooling hole, but there are also modifications, such as a U-shaped or a curved design of the cooling hole 26 conceivable.

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)

Abstract

L'invention concerne une culasse refroidie par eau (1) pour un moteur à combustion interne polycylindrique comprenant une chambre à réfrigérant (6) qui est refroidie à l'aide d'une quantité de réfrigérant principale issue de l'enveloppe de réfrigérant (22) d'un logement de cylindre (20). La culasse (1) comprend un système de refroidissement supplémentaire servant à refroidir les zones de liaison (4, 5) entre les ouvertures de soupape dans la base de culasse (2). La culasse selon l'invention comporte en outre un orifice de refroidissement (26) constitué de deux sections d'orifice de refroidissement (26a, 26b) qui sont disposées de manière à former un V et qui s'étendent à partir d'une paroi latérale (4, 5) vers une zone de liaison dans laquelle elles sont reliées. Le refroidissement de la zone de liaison (4, 5) est exécuté séparément du refroidissement principal de la culasse (1) par l'intermédiaire de l'orifice de refroidissement (26) qui est directement raccordé à une ouverture d'entrée (28) de l'enveloppe de réfrigérant (22) et qui comporte une ouverture de sortie (29) communiquant avec la chambre à réfrigérant (6).
PCT/EP2005/002345 2004-03-10 2005-03-05 Culasse refroidie par eau pour un moteur a combustion interne WO2005088111A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410011656 DE102004011656A1 (de) 2004-03-10 2004-03-10 Wassergekühlter Zylinderkopf für eine Brennkraftmaschine
DE102004011656.3 2004-03-10

Publications (1)

Publication Number Publication Date
WO2005088111A1 true WO2005088111A1 (fr) 2005-09-22

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PCT/EP2005/002345 WO2005088111A1 (fr) 2004-03-10 2005-03-05 Culasse refroidie par eau pour un moteur a combustion interne

Country Status (2)

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DE (1) DE102004011656A1 (fr)
WO (1) WO2005088111A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11008972B2 (en) * 2016-09-20 2021-05-18 Cummins Inc. Systems and methods for avoiding structural failure resulting from hot high cycles using a cylinder head cooling arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010036392B4 (de) 2010-07-14 2021-10-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Flüssigkeitsgekühlter Zylinderkopf für eine Brennkraftmaschine
DE102013012274A1 (de) 2013-07-23 2015-01-29 Daimler Ag Zylinderkopf für einen Verbrennungsmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576726A1 (de) 1967-06-14 1970-05-06 Kloeckner Humboldt Deutz Ag Wassergekuehlter Zylinderkopf fuer Brennkraftmaschinen
DE3802886A1 (de) 1987-02-04 1988-08-18 Avl Verbrennungskraft Messtech Zylinderkopf fuer wassergekuehlte brennkraftmaschinen
JPH05306649A (ja) * 1992-04-30 1993-11-19 Isuzu Motors Ltd ４バルブ副室式ディーゼルエンジンのシリンダヘッド
US5615641A (en) * 1994-06-09 1997-04-01 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Internal-combustion engine cylinder head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576726A1 (de) 1967-06-14 1970-05-06 Kloeckner Humboldt Deutz Ag Wassergekuehlter Zylinderkopf fuer Brennkraftmaschinen
DE3802886A1 (de) 1987-02-04 1988-08-18 Avl Verbrennungskraft Messtech Zylinderkopf fuer wassergekuehlte brennkraftmaschinen
JPH05306649A (ja) * 1992-04-30 1993-11-19 Isuzu Motors Ltd ４バルブ副室式ディーゼルエンジンのシリンダヘッド
US5615641A (en) * 1994-06-09 1997-04-01 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Internal-combustion engine cylinder head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 112 (M - 1565) 23 February 1994 (1994-02-23) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11008972B2 (en) * 2016-09-20 2021-05-18 Cummins Inc. Systems and methods for avoiding structural failure resulting from hot high cycles using a cylinder head cooling arrangement

Also Published As

Publication number Publication date
DE102004011656A1 (de) 2005-11-24

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