JP2002534634A - Reciprocating piston engine - Google Patents

Abstract

(57) Abstract The present invention relates to a reciprocating piston engine having at least one cylinder. The sliding surface 4 of the cylinder liner 2 of the cylinder is provided with at least one grooved oil pocket 8, thus forming the sliding surface 4 for the piston 6. The lateral direction of the oil pocket 8 is defined by a material region having a higher wear resistance than the base material of the cylinder liner 2. In order to achieve high reliability in operation, the material regions defining the lateral direction of the oil pockets 8 are each configured as a filling member 11 filling the groove 10. The depth of the groove 10 corresponds at least to the maximum wear thickness of the cylinder liner 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a reciprocating piston engine, and particularly to a large two-stroke diesel engine. The cylinder liner of the cylinder of the engine has, in the sliding surface area facing the piston, a material area which is more wear-resistant than the base material of the cylinder liner and forms a lateral boundary of at least one grooved oil pocket. are doing.

[0002]

[Prior art]

Such a reciprocating piston type internal combustion engine is known from Japanese Patent Publication No. 6-105102. In this known device, the cylinder liner has a wavy contour and forms a groove-shaped oil pocket on the sliding surface side. The top of the wavy contour is hardened by a hardening process. Molybdenum disulfide is coated on the cured site to improve the conformability, but disappears in a short time. Forming a wavy contour and performing a hardening treatment only on the top is a relatively costly process.
It has also been empirically found that the curing depth achieved by the curing process is relatively shallow.
In addition, there is a limit to the hardness that can be achieved only by the curing process. Thus, with this known configuration, the wave profile can only achieve a relatively short service life. There is the further disadvantage that hardening treatment limited to the top region will result in deformation and undesirable structural changes in adjacent material regions. As described above, the configuration of the known device is not simple, and a sufficiently long service life cannot be realized.

[0003]

[Problems to be solved by the invention]

Against this background, an object of the present invention is to improve a reciprocating piston engine of the above type by simple and inexpensive means, so that the cylinder liner has a long service life.

[0004]

SUMMARY OF THE INVENTION According to the present invention, it is an object of the present invention to form each material region defining a lateral boundary of an oil pocket as a filling member filling a groove, the depth of which is at least a cylinder liner. This is achieved by configuring to correspond to the maximum wear thickness.

[0005] According to the above steps, a free material can be selected as a filling member for the groove defining the oil pocket. Unlike base materials, materials that are superior to cured base materials under all conditions of use can be used. The groove depth may be much greater than the depth of the hardened layer formed by the hardening process. In the manufacturing stage, a smooth surface that can be easily processed by polishing or the like is first formed. Since the base material has low wear resistance and peelability, the base material between the groove filling members composed of different materials wears faster,
The desired oil pocket is formed automatically. These oil pockets persist until the cylinder liner is completely worn. Thus, by using the steps according to the invention, the disadvantages of the known device as described above are completely avoided.

[0006] Preferred structures and further suitable arrangements based on the basic principle are set out in the dependent claims. The filling element comprises at least partially a ceramic material, preferably a ceramic-metal mixture (cermet). This configuration provides, in particular, excellent stability. Furthermore, material parts of the type described above can be formed in a very simple manner, for example by means of a high-speed plasma spray method or a laser coating process.

In a further preferred configuration, the depth of each groove defining the lateral direction of the oil pocket can be formed to be greater than the maximum wear peel thickness of the cylinder liner. With this configuration, the groove filling member is held firmly on the base material until the cylinder liner is completely worn. If the groove is formed so that the cross section of the groove expands inward, the above-described action is promoted.

[0008]

Further preferred structures and developments of the basic principle are described in the other dependent claims, the details of which will become apparent from the following description of the illustrated embodiments.

The present invention is applied to a reciprocating piston type engine, particularly a reciprocating piston type internal combustion engine, preferably a large-sized two-stroke diesel engine operating at low speed. The structure and operation of such engines are known per se and need not be further described in connection with the present invention.

A large two-stroke diesel engine is provided, and the cylinder shown in FIG. 1 includes a cylinder liner 2 having an inlet slot 1. On the cylinder liner 2, a cylinder head 3 having discharge means (not shown) is arranged. The inside of the cylinder liner 2 is formed as a sliding surface and cooperates with a reciprocating piston 6.
The piston ring 5 is provided on the cylindrical surface of the piston 6. Lubricating oil is supplied to the sliding surface 4 by a lubricating oil supply passage 7.

In order to properly distribute the lubricating oil, in particular, to sufficiently supply the lubricating oil to the upper region of the sliding surface 4 which has been empirically found to be insufficient. In this region, a plurality of oil pockets 8 suitable for realizing good lubrication are provided. These are shown only in FIG. The concave portion that constitutes the oil pocket 8 has not been exposed at the beginning. However, when the engine is operated, the recess forming the oil pocket 8 is automatically formed due to wear and separation of the base material of the cylinder liner 2.

The side of each oil pocket 8 is formed by a material region 9. One oil pocket 8 is formed between two material regions 9. As can be seen from FIGS. 2 and 3, the material region 9 constituting the side of the oil pocket 9 is formed as a filling member 11 for the groove 10 to be combined. The material forming the filling member 11 has higher wear resistance than the base material of the cylinder liner 2 which is usually cast iron.
As shown in FIG. 3, in the initial state, the groove 10 is filled up to the height of the sliding surface 4, and a smooth surface that can be easily formed by polishing or the like is formed. First, the groove 10 is formed. Next, the filling member 11 is filled. Finally, the sliding surface 4 is finished.

Since the material forming the filling member 11 has higher wear resistance than the base material of the cylinder liner 2, as shown by the broken line in FIG. It is larger than the wear amount of the member 11. This means that the desired channel-shaped oil pocket 8 is formed between two adjacent filling members 11.

As a material forming the filling member 11, a material entirely or at least partially made of ceramic, for example, a mixed material of ceramic and metal (Cermet)
)) Is preferred. The material is preferably a carbide comprising copper and / or aluminum bronze and / or nickel and / or nickel chromium and / or molybdenum and / or aluminum graphite and / or nickel graphite and / or aluminum graphite bromide. And / or oxides and / or nitrides and / or borides and / or silicates and organic binders. Carbides, oxides, nitrides, borides and silicates are 10 to 60% in the high hardness phase and 5 to 5 in the low hardness phase.
Preferably it is 80%. Carbides, oxides, nitrides, borides, silicates,
It has proven to be particularly preferred if it is present in the form of a chromium compound. Chromium oxide is particularly effective because it has high stability as well as withstands high operating temperatures and is neither corrosive nor oxidizing.

In a preferred embodiment of the above-listed composition, the filling member 11 is 20-
50%, preferably 20-40% of carbides and / or oxides and / or nitrides and / or borides and / or silicates and at least 20-40%, preferably 60-80% of aluminum bronze Including. Preferred embodiments are 60-80%
20-40% oxide mixed with aluminum bronze, or at least aluminum bronze, preferably 10-20% molybdenum and 20-30% nickel or nickel carbide, or 20-40% aluminum bronze 30% to 50% of oxides, nitrides, or carbides. This type of material can be applied to / introduced into the groove 10 by an arc spray method, a flame spray method, a plasma spray method, or a high-speed spray method.

Other groups of materials, each containing 0.1-10% silicon and boron, can also be applied in the manner described above. The preferred material composition in this case is 10 to 1
8% chromium, 2-3% iron, 2-4% silicon, 2-4% boron, 0.1%
~ 0.5% carbon, balance nickel or 10-18% chromium, 2-3% iron, 2-4% silicon, 2-4% boron, 0.1-0. 5%
Of carbon, 6-12% molybdenum, 0.1-0.5% carbon, 30-40% cobalt, the balance being nickel, or 10-18% chromium,
3% iodine, 2-4% silicon, 2-4% boron, 0.1-0.5% carbon, 6-12% molybdenum, 1-6% copper, 0.1-0. 5% carbon, balance nickel, 10-18% chromium, 2-3% iodine,
2-4% silicon, 2-4% boron, 0.1-0.5% carbon, 6-12%
Molybdenum, 10-20% nickel, 65-88% tungsten carbide, 1
It may be a combination of 2% cobalt. In this case, examples of the forming method include a flame sintering method, an induction sintering method, and a laser sintering method.

When the filling member 11 is formed of a sintered material, carbide and / or oxide and / or nitride and / or boride and / or boride and / or oxide and / or nitride and / or boride of 10 to 60% in the high hardness phase and 5 to 80% in the low hardness phase are used. Silicate, 2-10% copper, 20-30% aluminum bronze, 10-85% nickel or nickel chromium, 10-30% chromium, 0.1-5% Carbon, 1-8% iron, 2-15% molybdenum or molybdenum sulfide or molybdenum disulfide or molybdenum oxide or molybdenum peroxide or molybdenum peroxide, 2-7% copper, 10-40% cobalt And 3
Material containing 0-80% tungsten carbide, or 88% tungsten and 1%
Materials containing 2% cobalt can be used.

Powder materials are also suitable. For example, 0.2-5% carbon, 20-50% chromium, 1-20% molybdenum, 1-20% vanadium, 0.1-4%
% Silicon or iodine, 0.1 to 5% manganese, 0.1 to 5% iron, and 0.5 to 50% carbide, oxide, nitride, boride, silicate, or sulfide. Powder materials including molybdenum / molybdenum dioxide / molybdenum oxide / molybdenum disulfide / molybdenum peroxide can be used. Here, each of silicon and / or boron is 0.1 to 5%, and the remainder is nickel. Particularly preferred materials in this case are 20-30% chromium, 1-10% molybdenum, 2-3% carbon, 2-5% vanadium, 0.2-1% manganese, A material containing 0.2 to 4% of silicon or boron, with the balance being nickel.

As a variant, the filling member 11 can also be formed by welding coating. Available materials include 2-20% aluminum, 0.5-10% iron,
0.1-8% manganese, 0.1-2% silicon, 0.1-10% nickel, 0.1-2% carbon, antimony, cobalt, beryllium, chromium,
It contains at least one of tin, cadmium, zinc and lead at a maximum of 5 to 20%, and the remainder is copper. A particularly preferred composition comprises 14-17% aluminum, 3-5% iron, 1-3% manganese, 0.1-2% silicon and up to 0.3% carbon. , The rest is copper.

The depth of the groove 10 shown in FIG. 3 d corresponds at least to the maximum wear thickness of the cylinder liner 4. Preferably, the depth d is greater than the maximum wear thickness, so that even if the cylinder liner 2 is completely worn, the support of the filling member 11 on the base material is guaranteed.
In this connection, it is advantageous if the cross section of the groove 10 has a flared shape, as indicated by the dashed line in FIG. The preferable range of the groove depth is 0.1 to 0.4% with respect to the diameter D of the sliding surface 4. The inner width of the oil pocket 8 corresponds to the interval of the groove 10 in which the filling member 11 is provided. This distance indicated by W in FIG. 2 is preferably in the range of 1 to 2% with respect to the diameter D of the sliding surface 4. The inner width of the groove 10, ie the width b of the mating filling member 11, is preferably equal to the groove depth d. In this way, good stability against shear stress is obtained.

One or more oil pockets 8 can be provided. The groove 10 in which the filling member 11 is provided in each of the oil pockets is preferably provided at a location where there is a risk of insufficient lubrication, that is, a location where there is a particularly high risk of thermal corrosion or the like. Such a portion is often an upper region of the sliding surface. The means for forming the oil pocket 8 in FIG. 1 is provided in the sliding surface area separated by the first and second piston rings 5 at the top dead center of the piston 6. Further oil pockets 8 or means for forming them can be provided in the region below the lowermost piston ring 5. In the illustrated embodiment, another oil pocket 8 is provided at a deeper position.

The oil pocket 8, that is, the material region constituting the oil pocket can be formed in a ring shape. Further, as a modification, a spiral material region 9 may be provided so that one or a plurality of oil pockets 8 extend in a spiral shape, that is, an oil pocket. These may extend over a part of the guide length of the sliding surface 4 or may extend over the entire length.

In the case of the helically extending oil pocket 8, the pitch indicated by P in FIG. 1 can be in the range of about 1.5 to 20% with respect to the diameter D of the sliding surface 4. This pitch may be constant over the entire length. However, in order to increase the density of the oil pockets at a higher risk location, a variable pitch may be used.

In the embodiment shown, the groove 10 and the filling member 11 associated therewith have a rectangular or trapezoidal cross section. The inner corners may be rounded to avoid notch tensile stress.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a cylinder of a large two-stroke diesel engine.

FIG. 2 is an enlarged sectional view showing a region where an oil pocket is formed in the device of FIG. 1;

FIG. 3 is a sectional view of a groove provided with a filling member in the apparatus of FIG. 1;

[Explanation of symbols]

 2 Cylinder liner 4 Sliding surface 6 Piston 8 Oil pocket 9 Material area 10 Groove 11 Filling member d Depth D Diameter of sliding surface

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] October 9, 2000 (2000.10.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Detailed description of the invention

[Correction method] Change

[Contents of correction]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a reciprocating piston engine, and particularly to a large two-stroke diesel engine.
It's about gin. The cylinder liner of this engine cylinder is
In the sliding surface area facing the pistonInMore resistant than cylinder liner base material
Excellent wear and forms a lateral boundary of at least one grooved oil pocket Configured as a filling member for filling at least one groove With material area
ing.

[0002]

BACKGROUND OF THE INVENTION An arrangement of this kind has been proposed by Chinese Patent No. 493 738 as an alternative to a local nitration or hardening treatment of a base material . Filling groove
As a material, bronze, white metal, or high hardness chromium has been proposed. The difference in hardness compared to the base over the scan material is about 50HB. At least the groove depth which have been proposed are 0.02 mm, which is a cured layer of about depth can be achieved by nitration process or curing process. With this type of configuration, a long service life of the cylinder liner cannot be realized.

[0003]

Against this background, it is an object of the present invention to improve a reciprocating piston engine of the type described above by simple and inexpensive means so that the cylinder liner has a long service life. It is to be.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a filling member (11) which fills a groove and defines a lateral boundary of an oil pocket, respectively, wherein 2-20% aluminum, 0% . 5-10% iron, 0.1-8% manganese, 0.1-2% silicon, 0 . And 1-10% of nickel, comprising a 0.1 to 2% of carbon, antimony, cobalt, beryllium, up to 5 to 20% chromium, tin, cadmium, zinc, at least one of lead, the remainder copper It includes aluminum bronze is, and is achieved by configuring so as to have a depth greater than the maximum frictional 耗厚of the cylinder liner.

[0005] A further solution according to the invention is that the filling members which fill the grooves and define the lateral boundaries of one oil pocket, respectively, at least partially comprise ceramic material and at least have a maximum wear thickness of the cylinder liner. It is configured to have a corresponding depth .

[0006] have these materials high wear resistance, preferably, may be welded or applied by high velocity plasma treatment or record over Heather coating process. In this way, relatively deep grooves can be filled reliably and easily, a long operating life is achieved and the desired effect is maintained over the entire useful life of the cylinder liner.

[0007] Preferred structures and further suitable arrangements on the basis of the basic principle are given in the dependent claims . The depth of each groove defining a lateral oil pocket may preferably be formed deeper than the maximum wear thickness of the cylinder liner. With this configuration, the groove filling member is held firmly on the base material until the cylinder liner is completely worn. If the groove is formed so that the cross section of the groove expands inward, the above-described action is promoted.

[0008]

Further preferred structures and developments of the basic principle are described in the other dependent claims, the details of which will become apparent from the following description of the illustrated embodiments.

The present invention is applied to a reciprocating piston type engine, particularly a reciprocating piston type internal combustion engine, preferably a large-sized two-stroke diesel engine operating at low speed. The structure and operation of such engines are known per se and need not be further described in connection with the present invention.

A large two-stroke diesel engine is provided, and the cylinder shown in FIG. 1 includes a cylinder liner 2 having an inlet slot 1. On the cylinder liner 2, a cylinder head 3 having discharge means (not shown) is arranged. The inside of the cylinder liner 2 is formed as a sliding surface and cooperates with a reciprocating piston 6.
The piston ring 5 is provided on the cylindrical surface of the piston 6. Lubricating oil is supplied to the sliding surface 4 by a lubricating oil supply passage 7.

In order to properly distribute the lubricating oil, in particular, to sufficiently supply the lubricating oil to the upper region of the sliding surface 4 which has been empirically found to be insufficient. In this region, a plurality of oil pockets 8 suitable for realizing good lubrication are provided. These are shown only in FIG. The concave portion that constitutes the oil pocket 8 has not been exposed at the beginning. However, when the engine is operated, the recess forming the oil pocket 8 is automatically formed due to wear and separation of the base material of the cylinder liner 2.

The side of each oil pocket 8 is formed by a material region 9. One oil pocket 8 is formed between two material regions 9. As can be seen from FIGS. 2 and 3, the material region 9 constituting the side of the oil pocket 9 is formed as a filling member 11 for the groove 10 to be combined. The material forming the filling member 11 has higher wear resistance than the base material of the cylinder liner 2 which is usually cast iron.
As shown in FIG. 3, in the initial state, the groove 10 is filled up to the height of the sliding surface 4, and a smooth surface that can be easily formed by polishing or the like is formed. First, the groove 10 is formed. Next, the filling member 11 is filled. Finally, the sliding surface 4 is finished.

Since the material forming the filling member 11 has higher wear resistance than the base material of the cylinder liner 2, as shown by the broken line in FIG. It is larger than the wear amount of the member 11. This means that the desired channel-shaped oil pocket 8 is formed between two adjacent filling members 11.

As a material forming the filling member 11, a material entirely or at least partially made of ceramic, for example, a mixed material of ceramic and metal (Cermet)
)) Is preferred. The material is preferably a carbide comprising copper and / or aluminum bronze and / or nickel and / or nickel chromium and / or molybdenum and / or aluminum graphite and / or nickel graphite and / or aluminum graphite bromide. And / or oxides and / or nitrides and / or borides and / or silicates and organic binders. Carbides, oxides, nitrides, borides and silicates are 10 to 60% in the high hardness phase and 5 to 5 in the low hardness phase.
Preferably it is 80%. Carbides, oxides, nitrides, borides, silicates,
It has proven to be particularly preferred if it is present in the form of a chromium compound. Chromium oxide is particularly effective because it has high stability as well as withstands high operating temperatures and is neither corrosive nor oxidizing.

In a preferred embodiment of the above-listed composition, the filling member 11 is 20-
50%, preferably 20-40% of carbides and / or oxides and / or nitrides and / or borides and / or silicates and at least 20-40%, preferably 60-80% of aluminum bronze Including. Preferred embodiments are 60-80%
20-40% oxide mixed with aluminum bronze, or at least aluminum bronze, preferably 10-20% molybdenum and 20-30% nickel or nickel carbide, or 20-40% aluminum bronze 30% to 50% of oxides, nitrides, or carbides. This type of material can be applied to / introduced into the groove 10 by an arc spray method, a flame spray method, a plasma spray method, or a high-speed spray method.

Other groups of materials, each containing 0.1-10% silicon and boron, can also be applied in the manner described above. The preferred material composition in this case is 10 to 1
8% chromium, 2-3% iron, 2-4% silicon, 2-4% boron, 0.1%
~ 0.5% carbon, balance nickel or 10-18% chromium, 2-3% iron, 2-4% silicon, 2-4% boron, 0.1-0. 5%
Of carbon, 6 to 12% molybdenum, 0.1 to 0.5% carbon, 30 to 40% cobalt, the balance being nickel, or 10 to 18% chromium,
3% iodine, 2-4% silicon, 2-4% boron, 0.1-0.5% carbon, 6-12% molybdenum, 1-6% copper, 0.1-0. 5% carbon, balance nickel, 10-18% chromium, 2-3% iodine,
2-4% silicon, 2-4% boron, 0.1-0.5% carbon, 6-12%
Molybdenum, 10-20% nickel, 65-88% tungsten carbide, 1
It may be a combination of 2% cobalt. In this case, examples of the forming method include a flame sintering method, an induction sintering method, and a laser sintering method.

When the filling member 11 is formed of a sintered material, carbide and / or oxide and / or nitride and / or boride and / or boride and / or oxide and / or nitride and / or boride of 10 to 60% in the high hardness phase and 5 to 80% in the low hardness phase are used. Silicate, 2-10% copper, 20-30% aluminum bronze, 10-85% nickel or nickel chromium, 10-30% chromium, 0.1-5% Carbon, 1-8% iron, 2-15% molybdenum or molybdenum sulfide or molybdenum disulfide or molybdenum oxide or molybdenum peroxide or molybdenum peroxide, 2-7% copper, 10-40% cobalt And 3
Material containing 0-80% tungsten carbide, or 88% tungsten and 1%
Materials containing 2% cobalt can be used.

Powder materials are also suitable. For example, 0.2-5% carbon, 20-50% chromium, 1-20% molybdenum, 1-20% vanadium, 0.1-4%
% Silicon or iodine, 0.1 to 5% manganese, 0.1 to 5% iron, and 0.5 to 50% carbide, oxide, nitride, boride, silicate, or sulfide. Powder materials including molybdenum / molybdenum dioxide / molybdenum oxide / molybdenum disulfide / molybdenum peroxide can be used. Here, each of silicon and / or boron is 0.1 to 5%, and the remainder is nickel. Particularly preferred materials in this case are 20-30% chromium, 1-10% molybdenum, 2-3% carbon, 2-5% vanadium, 0.2-1% manganese, A material containing 0.2 to 4% of silicon or boron, with the balance being nickel.

As a variant, the filling member 11 can also be formed by welding coating. Available materials include 2-20% aluminum, 0.5-10% iron,
0.1-8% manganese, 0.1-2% silicon, 0.1-10% nickel, 0.1-2% carbon, antimony, cobalt, beryllium, chromium,
It contains at least one of tin, cadmium, zinc and lead at a maximum of 5 to 20%, and the remainder is copper. A particularly preferred composition comprises 14-17% aluminum, 3-5% iron, 1-3% manganese, 0.1-2% silicon and up to 0.3% carbon. , The rest is copper.

The depth of the groove 10 shown in FIG. 3 d corresponds at least to the maximum wear thickness of the cylinder liner 4. Preferably, the depth d is greater than the maximum wear thickness, so that even if the cylinder liner 2 is completely worn, the support of the filling member 11 on the base material is guaranteed.
In this connection, it is advantageous if the cross section of the groove 10 has a flared shape, as indicated by the dashed line in FIG. The preferable range of the groove depth is 0.1 to 0.4% with respect to the diameter D of the sliding surface 4. The inner width of the oil pocket 8 corresponds to the interval of the groove 10 in which the filling member 11 is provided. This distance indicated by W in FIG. 2 is preferably in the range of 1 to 2% with respect to the diameter D of the sliding surface 4. The inner width of the groove 10, ie the width b of the mating filling member 11, is preferably equal to the groove depth d. In this way, good stability against shear stress is obtained.

One or more oil pockets 8 can be provided. The groove 10 in which the filling member 11 is provided in each of the oil pockets is preferably provided at a location where there is a risk of insufficient lubrication, that is, a location where there is a particularly high risk of thermal corrosion or the like. Such a portion is often an upper region of the sliding surface. The means for forming the oil pocket 8 in FIG. 1 is provided in the sliding surface area separated by the first and second piston rings 5 at the top dead center of the piston 6. Further oil pockets 8 or means for forming them can be provided in the region below the lowermost piston ring 5. In the illustrated embodiment, another oil pocket 8 is provided at a deeper position.

The oil pocket 8, that is, the material region constituting the oil pocket can be formed in a ring shape. Further, as a modification, a spiral material region 9 may be provided so that one or a plurality of oil pockets 8 extend in a spiral shape, that is, an oil pocket. These may extend over a part of the guide length of the sliding surface 4 or may extend over the entire length.

In the case of the helically extending oil pocket 8, the pitch indicated by P in FIG. 1 can be in the range of about 1.5 to 20% with respect to the diameter D of the sliding surface 4. This pitch may be constant over the entire length. However, in order to increase the density of the oil pockets at a higher risk location, a variable pitch may be used.

In the embodiment shown, the groove 10 and the filling member 11 associated therewith have a rectangular or trapezoidal cross section. The inner corners may be rounded to avoid notch tensile stress.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02F 1/00 F02F 1/00 D ER F16J 9/26 F16J 9/26 D (81) Designated country EP ( AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, UG, ZW), EA (AM , AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR , KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZWF terms (reference) 3G024 AA23 AA27 AA31 BA23 CA01 DA12 FA06 FA07 GA11 GA19 GA32 HA04 HA05 HA07 HA10 HA12 3J044 AA02 BA04 BB21 BC07 DA09 4K031 AA02 AA08 AB08 CB35 CB42 CB44 CB45 CB46 CB47 CB51 DA01 DA04 EA05

Claims (19)

[Claims] 1. A reciprocating piston engine with at least one cylinder, in particular a two-stroke heavy-duty diesel engine, wherein the cylinder of said cylinder is used to define a lateral boundary of at least one grooved oil pocket (8). The reciprocating piston type engine, wherein the liner (2) is configured to have higher wear resistance in a sliding surface region facing the piston (6) than the wear resistance of the base material of the cylinder liner, ), Which define the lateral boundaries of the grooves (1)
0) The reciprocating piston engine, formed as a filling member (11), wherein the depth (d) of the groove corresponds at least to the maximum wear thickness of the cylinder liner (2). 2. The method according to claim 1, wherein the filling member comprises 2-20% aluminum,
. 5-10% iron, 0.1-8% manganese, 0.1-2% silicon,
0.1-10% nickel, 0.1-2% carbon, antimony, cobalt,
Up to 5 of at least one of beryllium, chromium, tin, cadmium, zinc and lead
Aluminum bronze containing ２０20% with the balance being copper, preferably 14-17% aluminum, 3-5% iron, 1-3% manganese, 0.1-2% silicon; 2. The engine according to claim 1, wherein the engine is formed from aluminum bronze containing up to 0.3% carbon and the balance being copper. 3. The engine according to claim 2, wherein the filler member is formed at least partially as a weld coating. 4. The engine according to claim 1, wherein the filling member (11) comprises at least partly a ceramic material. 5. The engine according to claim 4, wherein the filling member (11) comprises a ceramic-metal mixture (cermet). 6. The filling member (11) is made of copper and / or aluminum bronze and / or
Or carbides and / or oxides and / or nitrides and / or borides containing nickel and / or nickel-chromium and / or molybdenum and / or aluminum graphite and / or nickel-graphite and / or aluminum-bromide graphite The engine according to claim 4, further comprising: a silicate; and / or an organic binder. 7. The high-hardness phase contains 10 to 60% of the carbide, oxide, nitride, boride and silicate, and the low-hardness phase contains 5 to 80%. The engine described in. 8. The engine according to claim 6, wherein the carbide, oxide, nitride, boride, and silicate are present in the form of a chromium compound. 9. The filling member (11) is 20 to 50%, preferably 20 to 50%.
Claims: 40% of carbides and / or oxides and / or nitrides and / or borides and / or silicates and at least 20 to 40%, preferably 60 to 80% of aluminum bronze. Item 8. The engine according to any one of items 4 to 7. 10. The method as claimed in claim 1, wherein the filling element is formed at least partially as a spray coating.
The engine described in the section. 11. Engine according to claim 1, wherein the charging element (11) is at least partially formed as a sintered material. 12. The depth d of the groove (10) is equal to the depth of the cylinder liner (2).
The engine according to any one of claims 1 to 11, wherein the engine is formed deeper than a maximum wear thickness of the engine. 13. The engine according to claim 1, wherein a cross section of the groove is formed so as to expand inward. 14. The depth (d) of the groove (10) is in the range of 0.1 to 0.4% with respect to the diameter (D) of the sliding surface (4). Claim 1
The engine according to any one of claims 1 to 13. 15. An oil pocket (8) in combination with said filling member (11).
The distance between the two grooves (10) forming the distance is set in the range of 1 to 2% with respect to the diameter (D) of the sliding surface (4). An engine according to any one of the preceding claims. 16. The engine according to claim 1, wherein the width (b) of the groove (10) is substantially equal to the groove depth (d). 17. A plurality of grooves (10) combined with at least one helical oil pocket (8) and filled with a filling member (11) are provided, the pitch of the helical being said sliding surface (4). The engine according to any one of claims 1 to 16, wherein the diameter is preferably in a range of 1.5 to 20% with respect to a diameter D of the engine. 18. A plurality of grooves (10) combined with at least one oil pocket (8) and filled with a filling member (11) are provided in the cylinder liner (1).
The engine according to any one of claims 1 to 17, wherein the engine is provided in at least an upper region of the engine. 19. The groove (10) is associated with a continuous oil pocket (8) extending over the guide length of the sliding surface (4) and the filling member (11).
20. The engine according to claim 1, wherein the engine is charged.