EP0094982A1 - Cylinder cover for water-cooled internal combustion engine - Google Patents

Cylinder cover for water-cooled internal combustion engine Download PDF

Info

Publication number
EP0094982A1
EP0094982A1 EP19820104585 EP82104585A EP0094982A1 EP 0094982 A1 EP0094982 A1 EP 0094982A1 EP 19820104585 EP19820104585 EP 19820104585 EP 82104585 A EP82104585 A EP 82104585A EP 0094982 A1 EP0094982 A1 EP 0094982A1
Authority
EP
European Patent Office
Prior art keywords
cooling
cylinder cover
chamber
cylindrical leg
long cylindrical
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
EP19820104585
Other languages
German (de)
French (fr)
Other versions
EP0094982B1 (en
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 DE8282104585T priority Critical patent/DE3272555D1/en
Priority to EP19820104585 priority patent/EP0094982B1/en
Publication of EP0094982A1 publication Critical patent/EP0094982A1/en
Application granted granted Critical
Publication of EP0094982B1 publication Critical patent/EP0094982B1/en
Expired legal-status Critical Current

Links

Images

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 la 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 lb of the combustion chamber wall defined by said cover, and then flows out externally.
  • the long leg la 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 lc cannot be cooled sufficiently.
  • a water-cooled cylinder cover comprising an annular upper cooling chamber and an annular lower cooling chamber provided in the outer peripheral portion of a long cylindrical leg formed in the lower part of the cylinder cover, and a plurality of cooling holes formed in the inner portion of the long cylindrical leg and having their opposite ends opening out into respective annular cooling chambers.
  • Figure 1 is a diagrammatic cross-sectional view showing a cylinder cover in a water-cooled diesel engine of the prior art
  • the cylinder cover 11 constructed in accordance with the invention has a lower portion in the form of a long cylindrical leg lla, the inner surfaces of the upper portion of the cover 11 and said leg(llc and lid 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 lla.
  • Two lower and upper annular cooling chambers, 15 and 16 respectively are defined between the outer periphery of the long cylindrical leg lla and the inner periphery of the metal sleeve 12, and circumferentially spaced cooling holes 9 are provided which communicate the upper cooling chamber 15 with 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 llc of the combustion chambers 5.
  • cooling holes 13 are drilled in the long cylindrical leg lla from the lower cooling chamber 14 towards the upper cooling chamber 15 in an obliguely upward direction (see Figure 5) at an angle 6 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.
  • 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 lla, 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 llb of the cylinder cover 11, it is fed into the exhaust valve cooling chamber 16. Due to the above-mentioned arrangement, the long cylindrical leg lla as well as the combustion chamber upper wall portion llb 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)

Abstract

In a cylinder cover incorporating a cooling arrangement, for the purpose of making it possible to sufficiently cool an inner peripheral portion (11d) of a long cylindrical leg (11a) formed in the lower part of the cylinder cover (11 said leg is provided with an upper cooling and lower annular cooling chambers 14, 15 in its outer peripheral portion, and a plurality of cooling holes (13, 13a, 13b) are formed in the inner portion of said leg and have their opposite ends opening out into respective cooling chambers 14 and 15.

Description

  • 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.
  • 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. In Figure 1, 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. Referring also to Figure 2, a large number of cooling holes 9 are formed in the cylinder cover 1 at a constant spacing around its circumference. Thus, in this arrangement, cooling water which has cooled the cylinder liner 3 enters into an annular cooling chamber 8 defined in the periphery of a long leg la of said cover and a surrounding sleeve 7 through an inlet path 10 in said sleeve 7. After cooling said long leg la, which is formed in the lower part of said cover, the water flows through the cooling holes 9 to cool the upper part lb of the combustion chamber wall defined by said cover, and then flows out externally.
  • However, the aforementioned cooling system in the prior art had the following shortcoming.
  • Though the long leg la 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 lc cannot be cooled sufficiently.
  • It is therefore an object of the present invention to provide a cylinder cover in which the aforementioned shortcoming in the prior art is eliminated and a cooling effect for a long cylindrical leg of the cylinder cover can be enhanced.
  • According to the present invention, there is provided a water-cooled cylinder cover comprising an annular upper cooling chamber and an annular lower cooling chamber provided in the outer peripheral portion of a long cylindrical leg formed in the lower part of the cylinder cover, and a plurality of cooling holes formed in the inner portion of the long cylindrical leg and having their opposite ends opening out into respective annular cooling chambers.
  • The above-mentioned and other features and objects of the present invention will become more apparent by reference to'the following description of a preferred embodiment of the invention taken in conjunction with the accompanying drawings, wherein:
  • Figure 1 is a diagrammatic cross-sectional view showing a cylinder cover in a water-cooled diesel engine of the prior art,
    • Figure 2 is a partial cross-sectional view showing a long cylindrical leg of the cylinder cover shown in Figure 1,
    • Figure 3 is a view similar to Figure 2, but of opposite hand, of one preferred embodiment of the present invention,
    • Figure 4 is a transverse complete, cross-sectional view developed along line IV-IV in Figure 3, as viewed in the direction of the arrows, and,
    • Figure 5 is a longitudinal cross-sectional view taken along line V-V in Figure 4, as viewed in the direction of the arrows.
  • Referring now to Figures 3 to 5 of the drawings, the cylinder cover 11 constructed in accordance with the invention has a lower portion in the form of a long cylindrical leg lla, the inner surfaces of the upper portion of the cover 11 and said leg(llc and lid 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 lla. Two lower and upper annular cooling chambers, 15 and 16 respectively are defined between the outer periphery of the long cylindrical leg lla and the inner periphery of the metal sleeve 12, and circumferentially spaced cooling holes 9 are provided which communicate the upper cooling chamber 15 with 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 llc of the combustion chambers 5.
  • In this embodiment further cooling holes 13 are drilled in the long cylindrical leg lla from the lower cooling chamber 14 towards the upper cooling chamber 15 in an obliguely upward direction (see Figure 5) at an angle 6 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. As shown in Figures 4 and 5 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 I - see Figure 4) to the inner peripheral surface lid of the long cylindrical leg lla 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 lla and the sleeve 12 for sealing of the annular water chambers 14 and 15.
  • In operation of the preferred embodiment, upon operation of the engine, 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 lla, 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 llb of the cylinder cover 11, it is fed into the exhaust valve cooling chamber 16. Due to the above-mentioned arrangement, the long cylindrical leg lla as well as the combustion chamber upper wall portion llb 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.
  • In summary, the present invention provides the following advantages:
    • (1) Since cooling holes are provided in the inner portion of a long cylindrical leg of a cylinder cover, the cooling holes can be disposed close to a wall surface of a combustion chamber. As a result, cooling of the long cylindrical leg can be achieved sufficiently.
    • (2) Since the cooling holes do not intersect with each other in the long cylindrical leg, concentration of stresses can be mitigated as compared with the prior art cylinder cover described, and hence thermal stresses as well as mechanical stresses in a cylinder cover can be reduced.
  • Since many changes and modifications could be made to the above construction, and other different embodiments proposed, within the scope of the present invention, it is intended that all matter contained in the above description and/or shown in the accompanying drawings shall be interpreted as illustrative, and not as limiting the scope of the invention.

Claims (2)

1. A cylinder cover incorporating a cooling arrangement comprising an annular cooling chamber in the outer peripheral portion of a long cylindrical leg portion formed in the lower part of said cylinder cover, and a plurality of circumferentially spaced holes communicating between said chamber and an exhaust valve cooling chamber, characterised in that two upper and lower annular chambers (14, 15) are provided in said outer peripheral portion of said cylindrical leg portion (lla), in that said cooling ducts (9) are connected only to said upper chamber (15), and in that further cooling ducts (13, 13a, 13b) are formed in the inner portion of said long cylindrical leg and have their opposite ends opening into respective annular cooling chambers (14, 15).
2. A cylinder cover as claimed in Claim 1, characterized in that said ducts (13, 13a, 13b) are inclined upwardly at an angle 6 to the vertical and are arranged so as to encircle the combustion chamber (5) in straight sections which do not interconnect.
EP19820104585 1982-05-26 1982-05-26 Cylinder cover for water-cooled internal combustion engine Expired EP0094982B1 (en)

Priority Applications (2)

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

Publications (2)

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

Family

ID=8189053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104585 Expired EP0094982B1 (en) 1982-05-26 1982-05-26 Cylinder cover for water-cooled internal combustion engine

Country Status (2)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602321A1 (en) * 1992-12-16 1994-06-22 Krupp MaK Maschinenbau GmbH Cooling device for combustion chamber opening or cylinder liner head
US5453573A (en) * 1994-07-25 1995-09-26 Caterpillar Inc. Engine cooling system
US6899063B2 (en) 2002-07-23 2005-05-31 Avl List Gmbh Cylinder head for a multicylinder liquid-cooled internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR910675A (en) * 1944-05-08 1946-06-14 Sulzer Ag Combustion chamber for internal combustion machines
DE959866C (en) * 1942-02-15 1957-03-14 Daimler Benz Ag Two-stroke diesel engine
FR2164304A5 (en) * 1971-12-09 1973-07-27 Sulzer Ag
FR2165429A5 (en) * 1971-12-15 1973-08-03 Sulzer Ag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959866C (en) * 1942-02-15 1957-03-14 Daimler Benz Ag Two-stroke diesel engine
FR910675A (en) * 1944-05-08 1946-06-14 Sulzer Ag Combustion chamber for internal combustion machines
FR2164304A5 (en) * 1971-12-09 1973-07-27 Sulzer Ag
FR2165429A5 (en) * 1971-12-15 1973-08-03 Sulzer Ag

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602321A1 (en) * 1992-12-16 1994-06-22 Krupp MaK Maschinenbau GmbH Cooling device for combustion chamber opening or cylinder liner head
US5453573A (en) * 1994-07-25 1995-09-26 Caterpillar Inc. Engine cooling system
US6899063B2 (en) 2002-07-23 2005-05-31 Avl List Gmbh Cylinder head for a multicylinder liquid-cooled internal combustion engine

Also Published As

Publication number Publication date
DE3272555D1 (en) 1986-09-18
EP0094982B1 (en) 1986-08-13

Similar Documents

Publication Publication Date Title
US4699092A (en) Fluid-cooled cylinder head
US3818878A (en) Improved cylinder head cooling
EP0356227A2 (en) Cooling system for multi-cylinder engine
FI66057B (en) VAETSKEKYLT FOER EN FYRTAKTS-DIESELMOTOR AVSETT CYLINDERLOCK
US4273080A (en) Exhaust gas conduit system for multi-cylinder reciprocating piston internal combustion engines
US4794884A (en) Internal combustion engine with fluid-cooled cylinder liner
GB2212559A (en) Cylinder head cooling structure for water-cooled multicylinder engine
US4616603A (en) Cylinder liner for a multi-cylinder internal combustion engine and an engine block therefor
US5253615A (en) Cylinder block cylinder bore isolator
US3659569A (en) Liquid cooled cylinder sleeve, particularly for internal combustion engines
US4253431A (en) Reciprocating piston internal combustion engine with at least one cylinder bushing
EP0094982A1 (en) Cylinder cover for water-cooled internal combustion engine
FI64703B (en) VAETSKEKYLT FOER EN FYRTAKTS-DIESELMOTOR AVSETT CYLINDERLOCK
US4530315A (en) Cylinder block
GB2099075A (en) A cylinder block for an internal combustion engine
EP0074156A2 (en) Piston in an internal combustion engine
JPH0613861B2 (en) Two-cycle engine piston
JP2516800B2 (en) Multi-cylinder engine cooling system
US2126089A (en) Internal combustion engine
US6035813A (en) Engines of reciprocating piston type
CN112654770A (en) Cylinder head for internal combustion engine and method of manufacturing the same
US2147186A (en) Engine cylinder
JP2849962B2 (en) Cylinder liner cooling structure
US1022502A (en) Gas-engine.
US2669978A (en) Engine cooling system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830202

AK Designated contracting states

Designated state(s): CH DE FR GB LI NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI NL SE

REF Corresponds to:

Ref document number: 3272555

Country of ref document: DE

Date of ref document: 19860918

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870527

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19871201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19880202

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19880526

GBPC Gb: european patent ceased through non-payment of renewal fee
EUG Se: european patent has lapsed

Ref document number: 82104585.3

Effective date: 19880616

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19960606

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL