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WO1995008058A1 - Chemise de cylindre pour moteur a crosse a deux temps, munie de rainures a huile et de graissage - Google Patents

Chemise de cylindre pour moteur a crosse a deux temps, munie de rainures a huile et de graissage Download PDF

Info

Publication number
WO1995008058A1
WO1995008058A1 PCT/DK1994/000303 DK9400303W WO9508058A1 WO 1995008058 A1 WO1995008058 A1 WO 1995008058A1 DK 9400303 W DK9400303 W DK 9400303W WO 9508058 A1 WO9508058 A1 WO 9508058A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder liner
recess
piston
cylinder
piston ring
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.)
Ceased
Application number
PCT/DK1994/000303
Other languages
English (en)
Inventor
Thomas Synnestvedt Knudsen
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.)
MAN B&W Diesel GmbH
MAN B&W Diesel AS
Original Assignee
MAN B&W Diesel GmbH
MAN B&W Diesel AS
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 MAN B&W Diesel GmbH, MAN B&W Diesel AS filed Critical MAN B&W Diesel GmbH
Publication of WO1995008058A1 publication Critical patent/WO1995008058A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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 
    • F02F1/18—Other cylinders
    • F02F1/20—Other cylinders characterised by constructional features providing for lubrication
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/083—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating cylinders
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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

Definitions

  • the present invention relates to a cylinder liner for a two-stroke crosshead engine with an intermediate bottom and with a piston having at least one piston ring, comprising at least one annular recess open inwards and with an oil supply, which recess is posi ⁇ tioned above the bottom dead centre of the uppermost piston ring.
  • Cylinder liners of this type are known from, for example, EP patent publication No. 0 299 174 and non- examined Japanese patent application No. 61-279 716.
  • seizures may occur between the piston skirt and the cylinder liner in an internal combustion engine. Such seizures tend to occur in the part of the liner which is not exposed to the running-in of its surface by the piston rings, and from there spread up through the cylinder. If the seizures spread to an area with a high contact pressure between the piston ring and the cylinder liner, the piston ring will also seize. This results in a hardening of the piston ring and eventually in a very rapid wearing-out of the cylinder liner.
  • the object of the invention is to prevent such seizures, were they to occur, from spreading.
  • the recess preferably extends continuously round along the inner side of the cylinder liner.
  • a recess is preferably positioned above the scavenging ports. With this position, apart from acting as a seizure barrier, the recess will also act as an oil reservoir and collect part of the lubri ⁇ cating oil pushed downwards by the piston rings during the expansion stroke. This oil is usually lost through the scavenging ports when the piston rings pass them. Instead, at least part of this oil is collected in the annular recess, and during the upward movement of the piston, the oil will then again come out of the reser- voir and help lubricate the piston rings, which are now on their way upwards in the liner. Thus, it is possible to save on lubricating oil.
  • a recess is preferably positioned below the scavenging ports, as in this type of engine it is particularly in this area that seizures occur.
  • FIG. 1 is a schematic semi-section through a cylinder.
  • the Figure shows a semi-section of a cylinder of a two-stroke internal combustion engine having a cylinder liner 1, a cylinder cover 2, a valve seat 3, and a valve body 4.
  • the cylinder liner 1 and the cylinder cover 2 are clamped to a cylinder frame box 6.
  • the cylinder liner 1 is provided with recesses and bores for cooling and it has scavenging ports 9.
  • the cylinder liner 1 is provided with an annular recess 7 having an oil supply 8 for lubrication of the piston.
  • the cylinder liner 1 is provided with two other recesses 10 and 11, respective ⁇ ly, which preferably extend unbrokenly round along the inner wall of the cylinder liner 1 and may have random cross-sections.
  • the recess 10 is positioned below the scavenging ducts 9, and the recess 11 is positioned above them.
  • the recesses 10 and 11 cause seizures, which may occur from time to time between the cylinder liner 1 and the skirt of the piston which will move up and down in the cylinder during operation, to be stopped, viz., they do not spread above the recess 10, 11 which is closest above the place where the seizure first occurs.
  • the recess 11 positioned above the scavenging ducts 9 further has the advantage that oil driven downwards by the piston rings during the expansion stroke when the engine is running, penetrates into the recess 11, which thus acts as a reservoir. During the upward movement of the piston, the oil will again come out of the recess 11 and have a lubricating effect on the piston rings, which are now on their way up through the cylinder liner 1.
  • the recess 10 is positioned about one third of the height of the scavenging ports below them, while the recess 11 is positioned about the height of a port above the scavenging ports. According to need, more recesses may be used, and their exact position is not decisive for their function, they merely have to be positioned in the lower part of the cylinder liner 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

Cette chemise de cylindre est destinée à un moteur muni d'un piston à au moins un segment, et comprend au moins un évidement annulaire (7) ouvert vers l'intérieur et présentant une alimentation en huile, ledit évidement étant situé au-dessus du point mort bas du segment supérieur. Un second évidement annulaire (10, 11), qui ne s'ouvre que vers l'intérieur du cylindre, est placé en un point correspondant à plus de 65 % de la course du piston au-dessous du point mort haut du segment supérieur.
PCT/DK1994/000303 1993-09-13 1994-08-11 Chemise de cylindre pour moteur a crosse a deux temps, munie de rainures a huile et de graissage Ceased WO1995008058A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK102293A DK170430B1 (da) 1993-09-13 1993-09-13 Cylinderforing til forbrændingsmotor
DK1022/93 1993-09-13

Publications (1)

Publication Number Publication Date
WO1995008058A1 true WO1995008058A1 (fr) 1995-03-23

Family

ID=8100111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1994/000303 Ceased WO1995008058A1 (fr) 1993-09-13 1994-08-11 Chemise de cylindre pour moteur a crosse a deux temps, munie de rainures a huile et de graissage

Country Status (3)

Country Link
DK (1) DK170430B1 (fr)
TW (1) TW268992B (fr)
WO (1) WO1995008058A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053900A1 (fr) * 1999-03-11 2000-09-14 Outboard Marine Corporation Systeme d'injection d'huile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694518A (en) * 1924-10-09 1928-12-11 Samuel W Rushmore Engine-lubricating system
CH342409A (de) * 1956-05-05 1959-11-15 Sulzer Ag Kolbenmaschine
US3021183A (en) * 1958-11-28 1962-02-13 Gould National Batteries Inc Cylinder and piston structures
CH450813A (de) * 1966-09-23 1968-04-30 Maschf Augsburg Nuernberg Ag Einrichtung zum Zuführen des Schmieröles in die Zylinder von wassergekühlten Brennkraftmaschinen
JPS5879645A (ja) * 1981-11-05 1983-05-13 Honda Motor Co Ltd エンジンの潤滑装置
EP0462358A1 (fr) * 1990-06-18 1991-12-27 William H. Crouse Bague de paroi du cylindre perméable à l'huile de graissage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694518A (en) * 1924-10-09 1928-12-11 Samuel W Rushmore Engine-lubricating system
CH342409A (de) * 1956-05-05 1959-11-15 Sulzer Ag Kolbenmaschine
US3021183A (en) * 1958-11-28 1962-02-13 Gould National Batteries Inc Cylinder and piston structures
CH450813A (de) * 1966-09-23 1968-04-30 Maschf Augsburg Nuernberg Ag Einrichtung zum Zuführen des Schmieröles in die Zylinder von wassergekühlten Brennkraftmaschinen
JPS5879645A (ja) * 1981-11-05 1983-05-13 Honda Motor Co Ltd エンジンの潤滑装置
EP0462358A1 (fr) * 1990-06-18 1991-12-27 William H. Crouse Bague de paroi du cylindre perméable à l'huile de graissage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 7, No. 177, M-233; & JP,A,58 079 645 (HONDA GIKEN KOGYO K.K.), 13 May 1983. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053900A1 (fr) * 1999-03-11 2000-09-14 Outboard Marine Corporation Systeme d'injection d'huile
US6792910B2 (en) * 1999-03-11 2004-09-21 Bombardier Recreational Products Inc. Oil injection system

Also Published As

Publication number Publication date
DK102293D0 (da) 1993-09-13
TW268992B (fr) 1996-01-21
DK102293A (da) 1995-03-14
DK170430B1 (da) 1995-08-28

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