GB1563637A - Water-cooled reciprocatingpiston internal combustion engine - Google Patents

Water-cooled reciprocatingpiston internal combustion engine Download PDF

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Publication number
GB1563637A
GB1563637A GB3732477A GB3732477A GB1563637A GB 1563637 A GB1563637 A GB 1563637A GB 3732477 A GB3732477 A GB 3732477A GB 3732477 A GB3732477 A GB 3732477A GB 1563637 A GB1563637 A GB 1563637A
Authority
GB
United Kingdom
Prior art keywords
sealing ring
liner
bore
flange
cooling
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
GB3732477A
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of GB1563637A publication Critical patent/GB1563637A/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • 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
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/005—Arrangements of sealings in combustion engines  involving cylinder liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
    • F16J10/02—Cylinders designed to receive moving pistons or plungers
    • F16J10/04—Running faces; Liners

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

Description

(54) WATER-COOLED RECIPROCATING-PISTON INTERNAL COMBUSTION ENGINE (71) We, KL & KNER-HUMBOLDT- DEUTZ AKTIENGESELLSCHAFT, a German Body Corporation, of Köln-Deutz German Federal Republic, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the follow mg statement:: This invention relates to a water-cooled reciprocating-piston internal combustion engine having a jacket, comprising a cylnder block having a supporting surface a bore in the block perpendicular to the supporting surface, the portion of the bore adjacent the supporting surface being formed to a predetermined locating diameter, a cylinder liner in the bore, an outwardly extending flange around one end of the liner by which the liner is clamped to the supporting surface, a collar formed around the liner adjacent the flange having a diameter which fits into the locating diameter to centre the liner in the bore, an annular sealing ring groove around the liner at the side of the collar remote from the flange, and a sealing ring in the groove.
It is known, where a cylinder liner is inserted into a bore in the cylinder block, to arrange a sealing ring beyond the locating diameter which serves to centre the cylinder liner in the bore, the sealing ring being clamped between a collar on the cylinder liner and a surface of the cylinder block.
Because the collar on the cylinder liner is exposed to high temperatures, the sealing effect of the sealing ring diminishes after only a relatively short operational life of the internal combustion engine due to the temperature-induced ageing of the sealing ring, and because of differential thermal stressing of the liner collar and the casing, with a consequent frictional movement. A further drawback of the known construction is that crevice cavitation or corrosion occurs at the centering diameter serving to centre the cylinder liner which, in an advanced state, leads to the destruction of the sealing surfaces of the sealing ring.
It is therefore the aim of the present invention to prevent the above described drawbacks and to provide an effective ageing-resistant sealing of the cooling water space or jacket in the high temperature region of the cylinder liner, i.e., at the end of the cooling water jacket adjacent the cylinder head.
This aim is achieved by providing a water-cooled reciprocating-piston internal combustion engine having a water jacket, comprising a cylinder block having a supporting surface, a bore in the block perpendicular to the supporting surface, the portion of the bore adjacent the supporting surface being formed to a predetermined locating diameter, a cylinder liner in the bore, an outwardly extending flange around one end of the liner by which the liner is clamped to the supporting surface, a collar formed around the liner adjacent the flange having a diameter which fits into the locating diameter to centre the liner in the bore, an annular sealing ring groove around the liner at the side of the collar remote from the flange, and a sealing ring in the groove engaging the locating diameter to close and seal the end of the water jacket nearest the flange while, at the same time, bounding a part of the water jacket, the external surface of the liner on the side of the sealing ring remote from the flange and the portion of the bore which likewise ties on the said side of the sealing ring also bounding the water jacket.
In this way it is achieved that the cooling water is led directly as far as the sealing ring so that direct flushing of the sealing ring eliminates high temperatures and hence premature ageing of the sealing ring.
As an optional feature, the bore in the cylinder block may be enlarged on the side of the sealing ring remote from the flange to allow a free flow of cooling water to the sealing ring. The large water space created adjacent the sealing ring prevents crevice cavitation or corrosion. As a result of the direct flushing of the sealing ring the cooling thereof is considerably improved. The sealing ring may initially have a circular crosssection and its cross-section may be changed to that of the sealing ring groove when compressed by the locating diameter.
As a further optional feature, the sealing ring may be fabricated of a hightemperature resistant, permanently elastic material, for example Viton (Registered Trade Mark). To improve the corrosion and ageing resistance, the sealing ring may be enveloped over at least the part of its surface facing the cooling water space by a high-temperature and cooling-medium resistant protective coating, for example P.T.F.E. (polytetrafluoroethylene).
The invention will now be described in greater detail with reference to the accompanying drawings illustrating two embodiments thereof in simplified form, in which Figure I shows part of a longitudinal section through a cylinder liner and a cylinder block with a sealing ring in accordance with the invention; and Figure 2 shows part of a longitudinal section through the sealing assembly with a sealing ring which is partially enveloped by a high-temperature and cooling-medium resistant protective coating.
In Figures 1 and 2, reference 1 denotes a cylinder liner surrounded by a cooling water space or jacket 2 formed by a bore in a cylinder block 3. The cylinder liner 1 is clamped to a supporting surface 5 of the cylinder blcok 3 via a flange 4 and is centered in the cylinder blcok 3 by means of a centering collar 6 engaging a locating diameter 10. In an annular sealing ring groove 7 formed around the cylinder liner 1 adjacent the centering collar 6 is a sealing ring 8 which, viewed in cross-section, is initially circular and has a large part of its surface in communication with the cooling medium in the cooling water space 2. The cross-section of the sealing ring 8 is changed from its initial circular shape to conform with the shape of the sealing ring groove 7 when the parts are assembled and the sealing ring is compressed by the locating diameter 10.On the side of the locating diameter 10 remote from the flange 4 the bore in the cylinder block is enlarged due to the slope 9 of the wall of the water jacket.
The sealing ring 8 may advantageously be made of a high-temperature resistant, per manently elastic material, for example, Viton (Registered Trade Mark).
In Figure 2 the sealing ring 8 is enveloped over a part of its surface by a hightemperature and cooling-medium resistant protective coating 11 over the area facing the cooling water space. The material of which this coating is composed may advantageously be P.T.F.E. (polytetrafluoroethylene).
By virture of the direct bounding of a part of the cooling water space 2 by the surface of the sealing ring 8 and hence flushing of the sealing ring 8, which is enhanced further by the enlargement of the bore in the cylinder block 3, high temperatures on the sealing ring and, thus, premature ageing of the material of the sealing ring, are avoided.
Since no obstructions are present in the cooling water space 2 in the immediate vicinity of the sealing ring 8, there is a free flow of coolant and no damage can occur to the surfaces bounding the cooling water space due to crevice cavitation or corrosion.
WHAT WE CLAIM IS: 1. A water-cooled reciprocating-piston internal combustion engine having a water jacket, comprising a cylinder block having a supporting surface, a bore in the block perpendicular to the supporting surface, the portion of the bore adjacent the supporting surface being formed to a predetermined locating diameter, a cylinder liner in the bore, an outwardly extending flange around one end of the liner by which the liner is clamped to the supporting surface, a collar formed around the liner adjacent the flange having a diameter which fits into the locating diameter to centre the liner in the bore, an annular sealing ring groove around the liner at the side of the collar remote from the flange, and a sealing ring in the groove engaging the locating diameter to close and seal the end of the water jacket nearest the flange, while at the same time bounding a part of the water jacket, the external surface of the liner on the side of the sealing ring remote from the flange and the portion of the bore which likewise lies on the said side of the sealing ring also bounding the water jacket.
2. An engine according to claim 1, in which the bore in the cylinder block is enlarged on the side of the sealing ring remote from the flange to allow a free flow of cooling medium to the sealing ring.
3. An engine according to claim 1 or claim 2, in which the sealing ring is initially of circular cross-section, and its crosssection is changed to conform to that of the sealing ring groove when compressed by the locating diameter.
4. An engine according to any preceding claim, in which the sealing ring is made of a high-temperature resistant, permanently elastic material.
5. An engine according to any preceding claim, in which the sealing ring is covered
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. cylinder block may be enlarged on the side of the sealing ring remote from the flange to allow a free flow of cooling water to the sealing ring. The large water space created adjacent the sealing ring prevents crevice cavitation or corrosion. As a result of the direct flushing of the sealing ring the cooling thereof is considerably improved. The sealing ring may initially have a circular crosssection and its cross-section may be changed to that of the sealing ring groove when compressed by the locating diameter. As a further optional feature, the sealing ring may be fabricated of a hightemperature resistant, permanently elastic material, for example Viton (Registered Trade Mark). To improve the corrosion and ageing resistance, the sealing ring may be enveloped over at least the part of its surface facing the cooling water space by a high-temperature and cooling-medium resistant protective coating, for example P.T.F.E. (polytetrafluoroethylene). The invention will now be described in greater detail with reference to the accompanying drawings illustrating two embodiments thereof in simplified form, in which Figure I shows part of a longitudinal section through a cylinder liner and a cylinder block with a sealing ring in accordance with the invention; and Figure 2 shows part of a longitudinal section through the sealing assembly with a sealing ring which is partially enveloped by a high-temperature and cooling-medium resistant protective coating. In Figures 1 and 2, reference 1 denotes a cylinder liner surrounded by a cooling water space or jacket 2 formed by a bore in a cylinder block 3. The cylinder liner 1 is clamped to a supporting surface 5 of the cylinder blcok 3 via a flange 4 and is centered in the cylinder blcok 3 by means of a centering collar 6 engaging a locating diameter 10. In an annular sealing ring groove 7 formed around the cylinder liner 1 adjacent the centering collar 6 is a sealing ring 8 which, viewed in cross-section, is initially circular and has a large part of its surface in communication with the cooling medium in the cooling water space 2. The cross-section of the sealing ring 8 is changed from its initial circular shape to conform with the shape of the sealing ring groove 7 when the parts are assembled and the sealing ring is compressed by the locating diameter 10.On the side of the locating diameter 10 remote from the flange 4 the bore in the cylinder block is enlarged due to the slope 9 of the wall of the water jacket. The sealing ring 8 may advantageously be made of a high-temperature resistant, per manently elastic material, for example, Viton (Registered Trade Mark). In Figure 2 the sealing ring 8 is enveloped over a part of its surface by a hightemperature and cooling-medium resistant protective coating 11 over the area facing the cooling water space. The material of which this coating is composed may advantageously be P.T.F.E. (polytetrafluoroethylene). By virture of the direct bounding of a part of the cooling water space 2 by the surface of the sealing ring 8 and hence flushing of the sealing ring 8, which is enhanced further by the enlargement of the bore in the cylinder block 3, high temperatures on the sealing ring and, thus, premature ageing of the material of the sealing ring, are avoided. Since no obstructions are present in the cooling water space 2 in the immediate vicinity of the sealing ring 8, there is a free flow of coolant and no damage can occur to the surfaces bounding the cooling water space due to crevice cavitation or corrosion. WHAT WE CLAIM IS:
1. A water-cooled reciprocating-piston internal combustion engine having a water jacket, comprising a cylinder block having a supporting surface, a bore in the block perpendicular to the supporting surface, the portion of the bore adjacent the supporting surface being formed to a predetermined locating diameter, a cylinder liner in the bore, an outwardly extending flange around one end of the liner by which the liner is clamped to the supporting surface, a collar formed around the liner adjacent the flange having a diameter which fits into the locating diameter to centre the liner in the bore, an annular sealing ring groove around the liner at the side of the collar remote from the flange, and a sealing ring in the groove engaging the locating diameter to close and seal the end of the water jacket nearest the flange, while at the same time bounding a part of the water jacket, the external surface of the liner on the side of the sealing ring remote from the flange and the portion of the bore which likewise lies on the said side of the sealing ring also bounding the water jacket.
2. An engine according to claim 1, in which the bore in the cylinder block is enlarged on the side of the sealing ring remote from the flange to allow a free flow of cooling medium to the sealing ring.
3. An engine according to claim 1 or claim 2, in which the sealing ring is initially of circular cross-section, and its crosssection is changed to conform to that of the sealing ring groove when compressed by the locating diameter.
4. An engine according to any preceding claim, in which the sealing ring is made of a high-temperature resistant, permanently elastic material.
5. An engine according to any preceding claim, in which the sealing ring is covered
over at least a part of its surface facing the cooling water space by a high-temperature and cooling-medium resistant coating, for example P.T.F.E. (polytetrafluoroethylene).
6. A water-cooled reciprocating-piston internal combustion engine having a water jacket, comprising a cylinder block having a supporting surface, a bore in the block perpendicular to the supporting surface, the portion of the bore adjacent the supporting surface being formed to a predetermined locating diameter, a cylinder liner in the bore, an outwardly extending flange around one end of the liner by which the liner is clamped to the supporting surface, a collar formed around the liner adjacent the flange having a diameter which fits into the locating diameter to centre the liner in the bore, an annular sealing ring groove around the liner at the side of the collar remote from the flange, and a sealing ring in the groove, constructed and arranged substantially as herein described, with reference to and as illustrated in the accompanying drawings.
GB3732477A 1976-09-15 1977-09-07 Water-cooled reciprocatingpiston internal combustion engine Expired GB1563637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762641404 DE2641404A1 (en) 1976-09-15 1976-09-15 WATER-COOLED PISTON ENGINE

Publications (1)

Publication Number Publication Date
GB1563637A true GB1563637A (en) 1980-03-26

Family

ID=5987911

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3732477A Expired GB1563637A (en) 1976-09-15 1977-09-07 Water-cooled reciprocatingpiston internal combustion engine

Country Status (3)

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DE (1) DE2641404A1 (en)
FR (1) FR2365030A1 (en)
GB (1) GB1563637A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130644A (en) * 1982-09-10 1984-06-06 Maschf Augsburg Nuernberg Ag Internal combustion engine having wet cylinder liners

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55104547A (en) * 1979-02-06 1980-08-11 Suriibondo:Kk Cylinder liner for liquid cooled-type internal combustion engine wound by belt-shaped seal material on its external circumferential surface and manufacture thereof
DE3330166A1 (en) * 1983-08-20 1985-02-28 Alfred Teves Gmbh, 6000 Frankfurt Device for sealing off a pressure vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130644A (en) * 1982-09-10 1984-06-06 Maschf Augsburg Nuernberg Ag Internal combustion engine having wet cylinder liners

Also Published As

Publication number Publication date
FR2365030A1 (en) 1978-04-14
FR2365030B1 (en) 1980-04-18
DE2641404A1 (en) 1978-03-16

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee