EP2199549A1 - Cylinder lubrication device for combustion engine - Google Patents

Abstract

The cylinder lubricating device (1) comprises a discharge opening (9) in an area between the scavenge ports (7) and the upper dead center in the cylinder wall (3) so that lubricating oil (10) is discharged from the cylinder (4). The scavenge ports are provided in an inlet area (6) of the cylinder. A recirculating unit (11) is provided for recirculating the lubricating oil in a sub-system (12) of the cylinder lubricating device.

Description

The invention relates to a cylinder lubricating device, and a reciprocating internal combustion engine, in particular slow-running large diesel engine with a cylinder lubricating device according to the preamble of the independent claim of the respective category.

Large diesel engines are often used as drive units for ships or in stationary operation, eg for driving large generators for generating electrical energy. The engines usually run for long periods in continuous operation, which places high demands on the reliability and availability. Therefore, for the operator in particular long maintenance intervals, low wear and an economical handling of fuels and supplies are central criteria for the operation of the machines. Among other things, the piston running behavior of such large-bore slow-running diesel engines is a determining factor for the length of the maintenance intervals, the availability and the lubricant consumption also directly for the operating costs and thus for the economy. With that comes the complex problems of lubrication of large diesel engines are becoming more and more important.

In large diesel engines, but not only these, the piston lubrication is performed by lubricating means in the reciprocating piston or in the cylinder wall, is applied by the lubricating oil on the tread of the cylinder wall, the friction between the piston and the tread and thus the wear of the tread and to minimize the piston rings. So today with modern engines, such as Wärtsilä's RTA engines, treadwear wear less than 0.05 mm for 1000 hours of operation. The lubricant delivery rate is about 1.3 g / kWh and less in such engines and should not least be further reduced for cost reasons as possible, while the wear is to be minimized.

As lubrication systems for lubricating the treads quite different solutions are known, both in terms of the actual execution of the lubrication devices themselves, as well as the procedures for lubrication. Thus, lubrication devices are known in which the lubricating oil is applied to the piston passing through the lubricant opening by a plurality of lubricant openings accommodated in the circumferential direction in the cylinder wall, wherein the lubricant is distributed by the piston rings both in the circumferential direction and in the axial direction. The lubricant in this method is not applied over a large area on the running surface of the cylinder wall, but more or less selectively between the piston rings on the side surfaces of the piston.

No matter which method the lubricating oil is applied to the mating partner, there are special problems in connection with the Cylinder lubrication of cross head large diesel engines, which are still unsolved.

One problem is, for example, the always occurring massive pollution of the receiver room with lubricating oil. The reason for this is that when the piston on its movement toward bottom dead center passes through the scavenging passages opening into the receiver space, the lubricating oil becomes from the piston ring grooves or from the piston ring package in which a certain amount of lubricating oil is always stored is, blown by the ruling in the piston ring package Überduck in the form of a lubricating oil cloud in the receiver room.

As is known to those skilled in the art, the gas pressure in the combustion chamber as in a labyrinth seal through the piston ring package and stored there together with the located in the piston ring package lubricating oil and, as long as the piston ring package sealingly abuts the tread of the cylinder wall, practically not escape. If the piston passes on its decompression movement in the direction of bottom dead center UT then the scavenging slots, the gas pressure stored in the piston ring package can escape abruptly via the scavenging slots into the receiver space in the form of a lubricating oil cloud together with the lubricating oil stored in the piston ring package, whereby the receiver space massively contaminated with lubricating oil becomes.

In addition to the pollution of the receiver room itself, this process has many other negative effects. Thus, the lubricating oil blown into the receiver chamber is of course also at least partially conveyed into the combustion chamber in the suction cycle with the fresh air supplied to the combustion chamber, where it is burned and thus finally lost for any further use.

In particular, the loss of lubricating oil, which is very expensive and contributes significantly to the operating costs of the large diesel engine should, if possible, be avoided or at least minimized in order to save costs and raw materials.

Another issue is the resulting often inadequate lubrication in the scavenging slots, ie above and below the scavenging slots and the scavenging slots themselves. There is often hardly any lubricant between the mating partners available, especially because the lubricating oil from the piston ring packages as above described is blown out through the scavenging slots.

The object of the invention is therefore to propose an improved lubricating device for lubricating a running surface of a cylinder of a reciprocating internal combustion engine, by which the problems described above are avoided and in particular the contamination of the receiver with lubricating oil is significantly reduced and preferably still saves lubricating oil and lubrication in the Area of the scavenging slots is improved.

The objects of the invention solving these objects are characterized by the features of independent claim 1.

The dependent claims relate to particularly advantageous embodiments of the invention.

The invention thus relates to a cylinder lubricating device for lubricating a running surface of a cylinder wall of a cylinder of a reciprocating internal combustion engine, in particular a slow-running two-stroke large diesel engine. In the cylinder is a piston along the tread between a bottom dead center and a top dead center in an axial direction and arranged to move back and forth. In this case, scavenging slots are provided at an inlet region of the cylinder, so that fresh air can be supplied to a combustion chamber of the cylinder in the operating state through the scavenging slots. According to the invention, a drain opening is provided in the cylinder wall in a region between the scavenging slots and the top dead center, so that lubricating oil can be discharged from the cylinder.

By the inventive discharge openings, it is now possible for a fouling of the receiver or the receiver chamber by lubricating oil, which has been sprayed from the piston ring packs under relatively high pressure previously in the form of a cloud of lubricating oil through the scavenging slots in the receiver room to effectively prevent.

Characterized in that preferably the discharged through the drain holes from the cylinder oil is removed and collected in an oil collection chamber, additional lubricating oil can be saved, since the oil collected in the oil reservoir can be used again. For this purpose, it can be supplied to a cleaning and / or recycling device, for example, in which the lubricating oil collected from the cylinder through the outlet opening is cleaned again, processed and returned to the lubricating oil circuit, in which it is, for example, returned to a fresh oil tank for lubricating oil ,

In a particularly important embodiment for practice, however, the oil collected in the oil collection chamber is returned directly from the oil collection chamber through inlet openings on the cylinder surface in the scavenging slots, so that for the first time the tread in the scavenging slots can be optimally and additionally supplied with lubricating oil. Thus, the contamination of the receiver with lubricating oil is prevented by the invention, it is the lubrication of the tread of the cylinder in the scavenging slots improved and at the same time saves lubricating oil, because the previously lost to the receiver lubricating oil can be used for lubrication.

In a preferred embodiment, a return means for returning lubricating oil is thus provided in a subsystem of the cylinder lubricating device. The subsystem can be, for example, the cylinder or the cylinder running surface of the cylinder, or a cleaning and / or recycling device in which the discharged from the cylinder via drain opening lubricating oil is recycled and the lubricating oil circuit is supplied again. In particular, it is also possible that the subsystem is a disposal container into which the lubricating oil discharged via the discharge opening is discarded because, for example, it can no longer be recirculated into the lubricating oil circuit.

As already mentioned, in an embodiment which is particularly important for practice, an oil collecting space communicating with the discharge opening is provided, so that lubricating oil can be supplied from the cylinder to the oil collecting space and can be temporarily stored there.

In this case, the aforementioned return means is particularly preferably an inlet opening provided in the cylinder wall and communicating with the oil collecting space, so that the lubricating oil can be returned from the oil collecting space into the cylinder for lubricating the running surface of the cylinder.

In particular, for reasons of space savings, the oil collection chamber can be an integral part of the cylinder wall of the cylinder, so that outside the cylinder liner no additional and space-consuming oil collection chamber must be provided, in particular, the oil collection chamber can of course be provided alternatively or additionally outside the cylinder.

Preferably, the oil collecting space is designed as an annular space completely or partially surrounding the cylinder.

In this case, at least two oil collecting chambers may be provided, which may be offset from each other, for example in the circumferential direction and / or in relation to the axial direction, so that on the one hand effective lubricating oil from the piston ring package of the piston in the oil collecting ring can be collected and on the other hand, the collected lubricating oil again better and larger area can be recirculated by means of the inlet openings on the tread.

For this purpose, preferably a plurality of inlet openings are provided, wherein the oil collecting space can also be divided by intermediate walls into a plurality of mutually separated oil space segments, so that are discharged through these individually and possibly in different ways lubricating oil through the drain holes in the individual oil chamber segment can and depending on the position of a specific oil compartment segment specific areas of the cylinder surface can be individually and selectively supplied with lubricating oil from the corresponding oil room segment.

For this purpose, a pressure valve and / or a check valve can be provided on the oil collecting space, preferably on each oil space segment, so that the amount of lubricating oil which can be returned to the subsystem by the return means, in particular the amount of lubricating oil which can be returned to the cylinder surface, can be set to a predefinable value range, and or so that the can be varied by the return means in the subsystem traceable amount of lubricating oil with respect to the circumferential direction and / or with respect to the axial direction.

Particularly preferably, the drain opening and / or the return means, in particular the inlet opening is designed such that a lubricating oil flow rate is adjustable and thus especially an optimal and both time-dependent and location-dependent adjustable lubrication of the tread is possible.

Furthermore, the invention relates to a reciprocating internal combustion engine, in particular two-stroke large diesel engine with an inventive cylinder lubricating device as described in this document.

Fig. 1

eine Zylinderanordnung eines Zweitakt-Grossdieselmotors gemäss der vorliegenden Erfindung;

Fig. 2

ein Ausführungsbeispiel mit einem Ölsammelraum;

Fig. 2a

ein Ausführungsbeispiel der Fig. 2 mit Ablaufnut und Zulaufnut;

Fig. 3

ein zweites Ausführungsbeispiel gemäss Fig. 2;

Fig. 4

ein drittes Ausführungsbeispiel gemäss Fig. 2;

Fig. 5a - 5d

Dekompressionsbewegung des Kolbens in der Nähe der Spülschlitze.

The invention will be explained in more detail below with reference to the schematic drawing. Show it:

Fig. 1

a cylinder assembly of a two-stroke large diesel engine according to the present invention;

Fig. 2

an embodiment with an oil collection chamber;

Fig. 2a

an embodiment of the Fig. 2 with drain groove and inlet groove;

Fig. 3

a second embodiment according to Fig. 2 ;

Fig. 4

a third embodiment according to Fig. 2 ;

Fig. 5a - 5d

Decompression movement of the piston near the scavenging ports.

The inventive cylinder arrangement of Fig. 1 is a typical arrangement as it is known per se for longitudinally purged two-stroke large diesel engines from the prior art, apart from the inventive drain opening.

The cylinder arrangement with the inventive cylinder lubricating device 1 for lubricating a running surface 2 of a cylinder wall 3 comprises a cylinder 4, which is also referred to as a cylinder liner 4, in which a piston 5 between the bottom dead center UT and the top dead center OT along the running surface 2 of the cylinder 4th is arranged in the axial direction A back and forth movable. The piston 5 comprises a piston ring packing 50, which is shown here schematically with only two piston rings 51, 52, namely with the combustion chamber 8 closest to the first piston ring 51, which is also referred to as top ring 51, and the second piston ring 52, the Example as oil collection ring 52 according to EP 1 936 245 A1 can be designed.

The combustion chamber 8 is shown at the top by a cylinder cover 800 with injector 801 and exhaust valve 802, the in Fig. 1 just opened, limited.

The piston is in a conventional manner via the piston rod 53 with a in Fig. 1 not shown crosshead, from which the reciprocating movement of the piston in the operating state of the large diesel engine is transmitted to the crankshaft, also not shown, of the machine. The piston rod 53 is guided through the receiver space 15, which adjoins the cylinder liner 4 at the bottom, and the stuffing box 151, which seals the receiver space 15 against the crankshaft space 16 underneath, so that no fresh air 71, symbolized by the arrow 71, emerges an unillustrated turbocharger under a high pressure, for example, under a pressure of four bar in the Receiver room 15 feeds, can get from the receiver room 15 in the crankshaft space 13.

In the operating state is in a conventional manner the combustion chamber 8 from the turbocharger fresh air 71 fed, as long as the top of the piston 5 hiss the bottom dead center position UT and the representation according to the upper end of the scavenging slots.

According to the invention, a drain opening 9 is provided in the cylinder wall 3 in a region between the scavenging slots 7 and the top dead center OT, so that lubricating oil 10 can be discharged from the cylinder 4. In the example of Fig. 1 the drain opening 9 is provided according to the representation above the receiver space 15 in the vicinity of the scavenging slots.

Fig. 2 shows a simple specific embodiment of the present invention, in which an annular oil collecting space 13 is provided above the scavenging slots 7 of the cylinder 4. The Fig. 3 and Fig. 4 show further training of the example according to Fig. 2 ,

The cylinder lubricating device 1 for lubricating a running surface 2 of a cylinder wall 3 of a cylinder 4 of a reciprocating internal combustion engine, in the present example a slow-running two-stroke large diesel engine, comprises a cylinder 4 in which cylinder 4 a piston 5 along the tread 2 between a bottom dead center UT and an upper one Dead center OT is arranged in an axial direction A back and forth. As can be seen well, the piston 5 is just above the scavenging slots 7, which at an inlet portion 6 of the cylinder 4 within a in Fig. 2 Not shown receiver space 15 are provided so that the combustion chamber 8 of the cylinder 4 in the operating state through the scavenging ports 7 fresh air 71 is fed from a likewise not shown for reasons of clarity turbocharger. According to the present invention in the cylinder wall 3 in a region between the scavenging ports 7 and the top dead center OT, a drain opening 9 is provided so that lubricating oil 10 can be discharged from the cylinder 4.

Although in the sectional view of the Fig. 2 so not recognizable, are in the present example of the Fig. 2 a plurality of drain openings 9 distributed over the circumferential direction U, so that the lubricating oil 10 can be discharged evenly over the circumferential direction U from the cylinder 4.

When the piston 5 passes the plurality of drain port 9 on its movement toward the bottom dead center UT, the lubricating oil 10 from the piston ring grooves or from the piston ring package 50, in which a certain amount of lubricating oil 10 is stored, by the ruling in the piston ring package Überduck blown into the drain opening 9 in the form of a lubricating oil cloud.

As is known in the art, the gas pressure in the combustion chamber 8 as in a labyrinth seal through the piston ring package 50 and is stored there together with the piston ring in package 50 located lubricating oil 10 to some extent and can, as long as the piston ring package 50 sealingly against the tread 2 of Cylinder wall 3 is applied, practically not escape. Passes the piston 5 on its decompression movement in the direction of bottom dead center UT then the drain holes 9, the gas pressure stored in the piston ring package can escape abruptly into the drain holes 9 in the form of a lubricating oil cloud together with the stored oil in the piston ring package 50 lubricating oil.

The check valve 17 prevents 9, the lubricating oil 10 and the lubricating oil cloud escapes through the opening 9 back into the cylinder. The check valve 17 thus blocks the fluid flow from the oil collection chamber 13 back into the cylinder.

The cloud of lubricating oil 10 then settles in the oil collection chamber 13 in the form of liquid lubricating oil 10 and forms at the bottom of the oil collection chamber 13 under the action of gravity a sump or a lake of lubricating oil 10. The so collected in the oil collection chamber 13 lubricating oil 10 is then again for the lubrication of the tread 2 of the cylinder wall 3 is available and is fed back for this purpose by the inlet opening 111 of the tread 2, which forms a subsystem 12 of the cylinder lubricating device 1.

In this case, formed by the at each expansion stroke of the piston 5 into the oil collection chamber 13 entering cloud of lubricating oil 10 in the interior of the oil collecting space a certain hydrostatic pressure, with which the oil collected in the oil collection chamber 13 10 back through the inlet opening 111 on the tread 2 of the cylinder wall. 3 is recirculated. On the one hand, this prevents the cloud of lubricating oil 10 from escaping into the receiver space and contaminating it. On the other hand, the lubrication of the tread 2 in the lower region of the cylinder 4, especially in the region of the scavenging slots 7 is significantly improved.

In the inlet opening 111, a check valve 18 is likewise provided, which prevents lubricating oil, part of the lubricating oil cloud or, for example, pressurized gas from passing from the combustion space 8 or from the receiver space 15 through the inlet opening 111 into the oil collecting space 13 through the inlet opening 111 , The check valve 18 thus blocks the fluid flow from the cylinder 4 into the oil collecting space 13.

In addition, a pressure valve 14 with which a predeterminable hydrostatic pressure in the oil collection chamber 13 is adjustable at the oil collection chamber 13, is provided, so that by the return means 11, 111, that is, here through the inlet opening 111 in the subsystem 12, so here on the tread 2 traceable amount of lubricating oil 10 is adjustable to a predeterminable value range.

In order to prevent the cloud of lubricating oil 10 from escaping from the oil collecting space 13 again before settling in the oil collecting space 13 in the form of liquid lubricating oil 10, deflecting plates 131, 132 are provided as a precaution, which help to prevent this.

It is also possible, as schematically using the Fig. 2a illustrated that the drain openings 9 and / or the inlet openings 111 are provided in a completely or partially circumferential in the circumferential direction U drain groove 90 and / or in a Zulaufnut 1110 in the cylinder wall 3, wherein the drain groove 90 and / or the Zulaufnut 1110 at the same time as an oil reservoir can serve, in which lubricating oil 10 can be stored for lubrication of the tread 2. Of course, the drain groove 90 and / or the feed groove 1110 need not necessarily be as in Fig. 2a shown schematically in the form of a zigzag line. The in Fig. 2a however, has the advantage that the plurality of drain openings 9 and / or the plurality of inlet openings 111 can be arranged at varying heights with respect to the axial direction A, so that more sheering oil 10 can be collected from the piston ring package 50, or for example longer can be applied to the passing piston 5 through the inlet openings 111, because the piston 5 on its movement along the tread 2 in the example of Fig. 2a Longer in the sphere of influence of the drain openings 9 and / or the inlet openings 111 dwells than when all drain openings 9 and / or all inlet openings 111 are provided at the same height with respect to the axial direction A. In this case, the drainage groove 90 and the inlet groove 1110 can be formed by one and the same groove in the cylinder wall 3 or else a separate groove for the drainage groove 90 and the inlet groove 1110 can also be provided in the cylinder wall 3 of the cylinder 4.

In this case, the oil collection chamber 13 may be formed in another embodiment also as an integral part of the cylinder wall 3 of the cylinder 4. Such an example is schematically based on Fig. 2a shown. In this case, a plurality of drain openings 9 and a plurality of inlet openings 111 in the specific embodiment of the Fig. 2 arranged one above the other in the tread 2 with respect to the axial direction A.

A particular advantage of the variant according to Fig. 2b of course, is that no additional space for the oil collection chamber 13 is claimed, since the oil collection chamber 13 is an integral part of the cylinder wall 3.

In another specific exemplary embodiment, which is not explicitly illustrated in the drawing, it is also possible for the lubricating oil 10 collected through the discharge opening 9 to be supplied in whole or in part to a lubricating oil processing device 12, which thus likewise forms a subsystem 12 of the inventive cylinder lubricating device 1. The lubricating oil treatment device 12 may be, for example, a cleaning device 12, with which the collected lubricating oil 10 is cleaned again and the lubricating oil circuit is then made available again.

In another embodiment, which is also not shown in the drawing, the collected through the drain opening 9 lubricating oil 10 is no longer recyclable, for example because it is too strong is dirty or because no return means 11, 111 is provided, so that the collected through the drain opening 9 lubricating oil 10 is disposed of properly in the case.

Based on Fig. 3 and Fig. 4 Exemplary further advantageous embodiments of the invention according to Fig. 2 presented.

So is the embodiment of the Fig. 3 In addition, a mudguard 133 provided in the form of a siphon 133 in the oil collection chamber 13 that dirt deposits 100 are retained and so particular can not get into the check valve 18 and can not get on the tread 2, so that clogging of the check valve 18 can be prevented and the harmful dirt is kept away from the tread 2.

In the example of Fig. 4 In addition, a drain valve 134 is provided with drain cock, so that the dirt 100 from time to time or even continuously and automatically removed from the oil collection chamber 13.

It should be expressly mentioned that no matter which of the described or mentioned in the context of this application embodiment is realized, the inventive cylinder lubricating device 1 in any case has the advantage that the stored in Kolberingpaket 50 lubricating oil 10 is not blown into the receiver room and this thereby polluted.

Look for him Fig. 5a to 5d is a decompression movement of the piston 5 from a position in which the piston ring packing 50 according to Fig. 5a is still above the drain opening 9, up to a position of the piston 5 according to Fig. 5d represented where the piston 5 is below the scavenging slots 7 in the vicinity of the bottom dead center UT.

In the postion according to Fig. 5a is the piston ring package 50 still completely above the drain holes 9 and the inlet openings 111, so that the stored under a certain gas pressure in the Kolberingpaket 50 lubricating oil 10 can not escape from the piston ring pack 50 substantially. There is neither a flow of lubricating oil 10 or a cloud of lubricating oil 10 from the cylinder 4 through the drain opening 9 into the oil collecting space in such a position, nor is there a backflow of lubricating oil 10 through the inlet opening 111 back to the cylinder surface. 2

According to Fig. 5b Due to the sufficiently large volume of the oil collecting space 13 now flows a large part of the cloud of lubricating oil 10 through the drain opening 9 under the action of the piston ring 50 in the package stored gas pressure in the oil collection chamber 13. It is only a very small part of the cloud of lubricating oil 10 lost to the piston bottom.

According to Fig. 5c the piston ring package has now moved further to a position below the inlet opening 111, wherein the cloud of lubricating oil 10 was previously almost completely spent in the oil collection chamber 13. In Fig. 5c is now under the prevailing in the oil collection chamber 13 hydrostatic pressure or simply under the influence of gravity, the previously collected lubricating oil 10 spent by the inlet opening 111 again on the tread 2, thereby improving the lubrication on the tread 2 in the scavenging slots 7 becomes. Due to the suitably small selected cross-section of the inlet opening 111, the pressure in the oil collection chamber 13 builds up only slowly, so that slowly and continuously over a sufficiently long period lubricating oil is fed back through the inlet opening 111 on the tread 2, so that the piston even in the something later on compression stroke can still profit from the oil collected in the oil collection room.

According to Fig. 5d Due to the lower pressure in the receiver chamber 15, which is now in communication with the combustion chamber 8, 11 further lubricating oil 10 can flow back to the tread 2 through the inlet opening 111 and so the lubrication of the Continue to improve piston 5 near bottom dead center UT.

Claims (15)

Cylinder lubricating device for lubricating a running surface (2) of a cylinder wall (3) of a cylinder (4) of a reciprocating internal combustion engine, in particular a slow-running two-stroke large diesel engine, in which cylinder (4) a piston (5) along the running surface (2) between a bottom dead center (UT) and a top dead center (OT) in an axial direction (A) is arranged to move back and forth, and at an inlet region (6) of the cylinder (4) scavenging ports (7) are provided, so that a combustion chamber (8) in the operating state through the scavenging slots (7) fresh air (71) can be supplied, characterized in that in the cylinder wall (3) in a region between the scavenging slots (7) and the top dead center (TDC) a drain opening (9 ) is provided so that lubricating oil (10) from the cylinder (4) can be discharged. Cylinder lubricating device according to claim 1, wherein a return means (11, 111) for returning lubricating oil (10) into a subsystem (12) of the cylinder lubricating device is provided. Cylinder lubricating device according to claim 1 or 2, wherein the subsystem (12) is the running surface (2) of the cylinder wall (3) of the cylinder (4). Cylinder lubricating device according to one of the preceding claims, wherein the subsystem (12) is a lubricating oil processing device (12). Cylinder lubricating device according to one of the preceding claims, wherein a with the drain opening (9) communicating oil collecting space (13) is provided so that lubricating oil (10) from the cylinder (4) to the oil collecting space (13) can be fed. Cylinder lubricating device according to one of claims 2 to 5, wherein the return means (11) provided in the cylinder wall (3) and with the oil collecting space (13) communicating inlet opening (111), so that the lubricating oil (10) from the oil collecting space (13). in the cylinder (4) is traceable. Cylinder lubricating device according to one of claims 5 or 6, wherein the oil collecting space (13) is an integral part of the cylinder wall (3) of the cylinder (4). Cylinder lubricating device according to one of claims 5 to 7, wherein the oil collecting space (13) outside the cylinder (4) is provided Cylinder lubricating device according to one of claims 5 to 8, wherein the oil collecting space (13) is designed as an annular space. Cylinder lubricating device according to one of claims 5 to 9, wherein at least two oil collecting spaces (13) are provided which are offset in the circumferential direction (U) and / or with respect to the axial direction (A) to each other. Cylinder lubricating device according to one of claims 5 to 10, wherein a plurality of inlet openings (111) are provided and / or the oil collecting space (13) is divided by partitions into a plurality of mutually separated oil chamber segments. Cylinder lubricating device according to one of claims 5 to 11, wherein at the oil collecting space (13), preferably at each oil space segment, a pressure valve (14) and / or a check valve (17, 18) is provided, so that by the return means (11, 111) in the subsystem (12) traceable amount of lubricating oil (10), in particular the on the cylinder surface (2) traceable amount of lubricating oil (10) is adjustable to a predetermined value range. Cylinder lubricating device according to one of claims 2 to 12, wherein the amount of lubricating oil (10) which can be returned to the subsystem (12) by the return means (11, 111) with respect to the circumferential direction (U) and / or with respect to the axial direction (11). A) is variable. Cylinder lubricating device according to one of claims 2 to 13, wherein the drain opening (9) and / or the return means (11), in particular the inlet opening (111) is designed such that a lubricating oil flow rate is adjustable. Reciprocating internal combustion engine, in particular two-stroke large diesel engine with a cylinder lubricating device (1) according to one of claims 1 to 14.

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