EP0094982B1 - Zylinderkopf für eine wassergekühlte Brennkraftmaschine - Google Patents

Zylinderkopf für eine wassergekühlte Brennkraftmaschine Download PDF

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Publication number
EP0094982B1
EP0094982B1 EP19820104585 EP82104585A EP0094982B1 EP 0094982 B1 EP0094982 B1 EP 0094982B1 EP 19820104585 EP19820104585 EP 19820104585 EP 82104585 A EP82104585 A EP 82104585A EP 0094982 B1 EP0094982 B1 EP 0094982B1
Authority
EP
European Patent Office
Prior art keywords
cooling
cylinder cover
leg portion
chamber
cylindrical leg
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
Application number
EP19820104585
Other languages
English (en)
French (fr)
Other versions
EP0094982A1 (de
Inventor
Katsuo Yodogawa
Yasutaka Irie
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to EP19820104585 priority Critical patent/EP0094982B1/de
Priority to DE8282104585T priority patent/DE3272555D1/de
Publication of EP0094982A1 publication Critical patent/EP0094982A1/de
Application granted granted Critical
Publication of EP0094982B1 publication Critical patent/EP0094982B1/de
Expired 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
    • F01P3/02—Arrangements for cooling cylinders or 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 
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the present invention relates to cylinder-head covers for use in a water-cooled internal combustion engine, and particularly to the cooling system incorporated in such covers.
  • FIG. 1 A diagrammatic view of one type of cylinder cover of the prior art is illustrated in Figure 1, and a cross-section of a long cylindrical leg of the same cylindrical cover is shown in Figure 2.
  • the cylinder cover is shown supporting an exhaust valve 2 over a cylinder, said cover being bolted down onto a cylinder liner 3 located within a cylinder jacket 4.
  • the cylinder liner 3 and cover 1 define a combustion chamber 5 above the associated piston 6.
  • a large number of cooling holes 9 are formed in the cylinder cover 1 at a constant spacing around its circumference.
  • cooling water which has cooled the cylinder liner 3 enters into an annular cooling chamber 8 defined in the periphery of a long leg 1a of said cover and a surrounding sleeve 7 through an inlet path 10 in said sleeve 7.
  • the water flows through the cooling holes 9 to cool the upper part 1b of the combustion chamber wall defined by said cover, and then flows out externally.
  • the long leg 1a is cooled only by the cooling water in the cooling chamber 8, since only the outer peripheral portion of said long leg is cooled, the inner peripheral portion, that is, the portion along the part defining the combustion chamber wall 1c cannot be cooled sufficiently.
  • German Patent Specification DE-C-959,866 there is described a cooling arrangement for an internal combustion engine cylinder of a kind having a cylinder liner which is closed at its upper end by an integral wall to define the combustion chamber rather than having a separate cylinder cover.
  • the upper part of the cylinder liner is surrounded by a sleeve which, together with the liner, define two spaced cooling chambers around the outside of the liner, the uppermost chamber being connected through radial bores in the upper wall of the liner with a further cooling chamber formed above the upper wall.
  • the two cooling chambers are interconnected by slanting grooves formed in the outer surface of the liner.
  • the grooves in its outer surface extend no closer to the inner surface of the liner than the two chambers they interconnect and could not effectively cool the inner portion thereof adjacent the combustion chamber without seriously weakening the liner by increasing the depth of the grooves.
  • a cylinder cover incorporating a cooling arrangement comprising annular cooling means in the outer peripheral portion of a long cylindrical leg portion of the lower part of the cylindrical cover, and a plurality of circumferentially spaced cooling ducts communicating between said annular cooling means and a further cooling chamber for cooling for example an exhaust valve, characterised in that the annular cooling means comprises upper and lower annular chambers provided in the outer peripheral portion of said leg portion, in that said cooling ducts are connected only from the upper chamber to said further cooling chamber, and in that a plurality of cooling bores are formed within the cylindrical leg portion which extend through the inner portion thereof and which are inclined with their opposite ends opening into the upper and lower annular cooling chambers respectively, the plurality of cooling bores being each drilled in the form of a straight line, from one position on the outer peripheral surface of the long cylindrical leg portion through the leg portion to another position obliquely in the horizontal section and being arranged around the cylindrical leg portion such that they do not intersect.
  • the cylinder cover 11 constructed in accordance with the invention has a lower portion in the form of a long cylindrical leg 11a, the inner surfaces of the upper portion of the cover 11 and said leg (11c c and 11 d respectively) defining the upper part of a combustion chamber 5.
  • a metal sleeve 12 is fixedly secured to the outer periphery of the long cylindrical leg 11a.
  • a lower and an upper annular cooling chamber 14 and 15 respectively, are defined between the outer periphery of the long cylindrical leg 11a, and the inner periphery of the metal sleeve 12, and circumferentially spaced cooling holes 9 are provided which communicate the upper cooling chamber 15 which an exhaust valve cooling chamber 16, these cooling holes 9 being drilled in the cylinder cover 11 close to and parallel with the upper wall surface 11c of the combustion chambers 5.
  • cooling holes 13 are drilled in the long cylindrical leg 11a from the lower cooling chamber 14 towards the upper cooling chamber 15 in an obliquely upward direction (see Figure 5) at an angle 8 with respect to the vertical direction, these cooling holes 13 thus communicating the respective chambers 14 and 15 with each other.
  • a plurality of such cooling holes 13 are provided so as to encircle the combustion chamber as a whole.
  • the cooling holes 13 are formed in straight sections without intersecting each other, that is, without connecting to each other along their length (see numerals 13, 13a and 13b) and they are arrayed at a constant circumferential spacing.
  • the aforementioned respective cooling holes 13 are provided as close (at a distance / - see Figure 4) to the inner peripheral surface 11 d of the long cylindrical leg 11a as is permissable to ensure adequate mechanical strength to withstand gas pressure at this point.
  • "O"-rings 17 and 18 are provided between the periphery of the leg 11a and the sleeve 12 for sealing of the annular water chambers 14 and 15.
  • cooling water entering, via the inlet 10 through the sleeve 12, into the lower cooling chamber 14 flows into the respective cooling holes 13 as it flows around through the lower cooling chamber 14, and while it is cooling the long cylindrical leg 11a, it flows into the upper cooling chamber 15.
  • the cooling water in the upper cooling chamber 15 enters into the cooling holes 9, and after it has cooled the combustion chamber upper wall portion 11b of the cylinder cover 11, it is fed into the exhaust valve cooling chamber 16.
  • the long cylindrical leg 11a as well as the combustion chamber upper wall portion 11b of the cylinder cover 11 can be sufficiently cooled. Accordingly, the complete cylinder can be cooled uniformly; hence, unevenness of temperature distribution can be corrected, and thereby thermal stresses in the cylinder cover can be reduced.
  • the present invention provides the following advantages:

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)

Claims (2)

1. Zylinderkopf (11) mit einer Kühlanordnung, die eine ringförmige Kühleinrichtung im äußeren Umfangsbereich einer langen zylindrischen Schürze (11a) des unteren Teiles des Zylinderkopfes (11) umfaßt sowie mit einer Mehrzahl von auf dem Umfang verteilt angeordneten Kühlkanälen (9), die eine leitende Verbindung zwischen der ringförmigen Kühleinrichtung sowie einer weiteren Kühlkammer (16) herstellen, um beispielsweise ein Auslaßventil zu kühlen, dadurch gekennzeichnet, daß die ringförmige Kühleinrichtung eine obere und eine untere Ringkammer (14, 15) umfaßt, die im äußeren Umfangsbereich der Schürze (11a) vorgesehen sind, daß die Kühlkanäle (9) lediglich die obere Kammer (15) mit der unteren Kühlkammer (16) verbinden, und daß eine Anzahl von Kühlbohrungen (13, 13a, 13b) innerhalb der zylindrischen Schürze (11a) eingeformt sind, die sich durch deren inneren Bereich hindurcherstrecken, mit ihren einander gegenüberliegenden Enden geneigt sind und in die obere bzw. untere Kühlkammer (14, 15) einmünden, und daß die Anzahl von Kühlbohrungen (13, 13c, 13b) jeweils geradlinig gebohrt sind, und zwar von einer Stelle auf der äußeren Umfangsfläche der langen zylindrischen Schürze (11a) durch die Schürze hindurch zu einer weiteren Stelle, die in einem Horizontalschnitt geneigt ist und die um die zylindrische Schürze (11a) herum derart angeordnet sind, daß sie sich nicht schneiden.
2. Zylinderkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Kühlbohrungen (13, 13a, 13b) in gleichen Abständen um die zylindrische Schürze (11 a) herum angeordnet sind, derart, daß sie den oberen Teil der hierdurch begrenzten Brennkammer (15) umgeben.
EP19820104585 1982-05-26 1982-05-26 Zylinderkopf für eine wassergekühlte Brennkraftmaschine Expired EP0094982B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820104585 EP0094982B1 (de) 1982-05-26 1982-05-26 Zylinderkopf für eine wassergekühlte Brennkraftmaschine
DE8282104585T DE3272555D1 (en) 1982-05-26 1982-05-26 Cylinder cover for water-cooled internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820104585 EP0094982B1 (de) 1982-05-26 1982-05-26 Zylinderkopf für eine wassergekühlte Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0094982A1 EP0094982A1 (de) 1983-11-30
EP0094982B1 true EP0094982B1 (de) 1986-08-13

Family

ID=8189053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104585 Expired EP0094982B1 (de) 1982-05-26 1982-05-26 Zylinderkopf für eine wassergekühlte Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0094982B1 (de)
DE (1) DE3272555D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306137C1 (de) * 1992-12-16 1994-03-31 Mak Maschinenbau Krupp Kühleinrichtung für Flammringe
US5453573A (en) * 1994-07-25 1995-09-26 Caterpillar Inc. Engine cooling system
AT6342U1 (de) 2002-07-23 2003-08-25 Avl List Gmbh Zylinderkopf für eine flüssigkeitsgekühlte mehrzylinder-brennkraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959866C (de) * 1942-02-15 1957-03-14 Daimler Benz Ag Zweitakt-Dieselmaschine
FR910675A (fr) * 1944-05-08 1946-06-14 Sulzer Ag Chambre de combustion pour machines à combustion interne
CH545915A (de) * 1971-12-09 1974-02-15
CH545914A (de) * 1971-12-15 1974-02-15

Also Published As

Publication number Publication date
DE3272555D1 (en) 1986-09-18
EP0094982A1 (de) 1983-11-30

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