EP3130771A1 - Dispositif de lubrification pour revetement de cylindre, procede de lubrification et revetement de cylindre - Google Patents

Dispositif de lubrification pour revetement de cylindre, procede de lubrification et revetement de cylindre Download PDF

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Publication number
EP3130771A1
EP3130771A1 EP15180885.4A EP15180885A EP3130771A1 EP 3130771 A1 EP3130771 A1 EP 3130771A1 EP 15180885 A EP15180885 A EP 15180885A EP 3130771 A1 EP3130771 A1 EP 3130771A1
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EP
European Patent Office
Prior art keywords
lubricant
port
cylinder
cylinder liner
lubricating
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.)
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Application number
EP15180885.4A
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German (de)
English (en)
Inventor
Konrad Räss
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Winterthur Gas and Diesel AG
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Winterthur Gas and Diesel AG
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Publication date
Application filed by Winterthur Gas and Diesel AG filed Critical Winterthur Gas and Diesel AG
Priority to EP15180885.4A priority Critical patent/EP3130771A1/fr
Publication of EP3130771A1 publication Critical patent/EP3130771A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • F01M1/14—Timed 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F01M2011/022—Arrangements of lubricant conduits for lubricating cylinders

Definitions

  • the invention relates to a lubricating device for a cylinder liner of a reciprocating internal combustion engine, in particular slow-running two-stroke large diesel engine, a lubrication method for lubricating a cylinder liner, and a cylinder liner according to the preamble of the independent claim of the respective category.
  • 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.
  • 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.
  • the lubricant in this method is not applied over a large area to the running surface of the cylinder wall, but more or less selectively between the piston rings on the side surfaces of the piston, the distribution of the lubricating oil on the tread is often insufficiently ensured, resulting in excessive heat development excessive friction and in the last consequence locally to a welding of the contact surfaces of piston and tread with subsequent material outbreak, so can lead to a piston seizure.
  • a lubricating system in which the lubricating oil is sprayed under high pressure by means of atomizing nozzles, which are housed in the cylinder walls, substantially tangential to the cylinder wall in the scavenging air located in the combustion chamber, wherein the lubricating oil is atomized into small particles.
  • a plurality of lubricant nozzles are accommodated in the moving piston, so that the lubricant can essentially be applied anywhere over the entire height of the running surface.
  • the metering of the lubricant is a central point.
  • the quantity of lubricant to be applied to the running surface per unit of time and area may depend on many different parameters during operation of the reciprocating internal combustion engine. For example, the chemical composition of the fuel used, in particular its sulfur content plays an important role.
  • the lubricant is used, inter alia, for the neutralization of aggressive acids, especially sulfur-containing acids that arise during the combustion process in the combustion chamber of the engine , Therefore, depending on the fuel used different grades of lubricant can be used, which differ, inter alia, in their neutralization ability, for which the so-called BN value of the lubricant is a measure.
  • a lubricant with a higher BN value it may be advantageous to use a lubricant with a higher BN value than a fuel with a lower sulfur content, because a lubricant with a higher BN value has a stronger acid neutralization effect.
  • Another problem in the metering of the amount of lubricant to be applied are temporal and / or local variations in the state of the lubricant film, in particular the thickness of the lubricant film in the operating state of the reciprocating internal combustion engine.
  • the necessary amount of lubricant for example, from a variety of operating parameters, such as the speed, the combustion temperature, the engine temperature, the cooling power for cooling the engine, the load and many other operating parameters more dependent. So it may be possible that at a given speed and higher load a different amount of lubricant must be applied to the tread of the cylinder, as with the same speed and lower load.
  • the state of the internal combustion engine itself can have an influence on the amount of lubricant.
  • the amount of lubricant to be used can vary greatly.
  • increased friction is to some extent quite desirable in order for the mating partners, e.g. Piston rings and tread, grind in and can optimally adjust to each other.
  • this can be achieved by using a different amount of lubricant in the running-in phase of a cylinder than in the case of a cylinder which is already in operation for a considerable number of operating hours. Therefore, in a multi-cylinder engine, the amount of lubricant is often separately adjustable, particularly for each cylinder.
  • the cylinder running surface will wear differently both in the circumferential direction and in the longitudinal direction depending on the number of operating hours performed. This applies analogously, for example, for the piston rings and the piston itself.
  • the amount of lubricant in a reciprocating internal combustion engine must not only be adjusted depending on the number of hours worked, but the amount of lubricant should be metered depending on the time and depending on different localities within one and the same cylinder at different points of the tread of the cylinder wall.
  • the amount of lubricant to be introduced by a particular lubricant nozzle at a particular time various methods are known. In simple cases, the amount of lubricant, possibly taking into account the quality of the fuel used and the lubricant itself, simply controlled depending on the operating state of the reciprocating internal combustion engine, for example as a function of load or speed, due to already performed operating hours and the state of wear of the mating partner Can be considered.
  • CH 613 495 discloses a cylinder apparatus for a reciprocating internal combustion engine, which detects abnormal frictional conditions of the piston rings by means of a temperature or vibration sensor to prevent the seizure of piston rings during operation and increases the amount of lubricating oil discharged from a specific lubrication point when such disturbances occur.
  • the EP 0 652 426 shows a method in which by cyclically measuring the temperature in the cylinder wall, the occurrence of scuffing or Verschleissfressen is detected on the basis of a characteristic temperature profile and a corresponding damage by an automatic power reduction and / or by increasing the supply of lubricant is counteracted.
  • the lubricant quantity is increased for this cylinder until the detected abnormal operating state disappears again and the quantity of lubricant supplied to this cylinder per unit time again can be reduced.
  • Hydrodynamic lubrication is when a lubricant film of such thickness is formed between the mating partners, that is, for example, between the running surface of a cylinder wall and the piston ring of a piston, that the surfaces of the mating partner are well separated by the lubricant film, so that they are not touch.
  • Another limiting case is the so-called mixed friction or mixed lubrication condition.
  • the lubricant film between the mating partners is, at least in part, so thin that the mating partners touch each other directly.
  • the so-called lack lubrication is settled.
  • the lubricant film is just so thick that the counterpart partners no longer touch;
  • the amount of lubricant between the mating partners is not enough that a hydrodynamic lubrication could build up.
  • the thickness of the lubricant film is preferably selected so that a Setting the state of hydrodynamic lubrication between the mating partners.
  • two-stroke large diesel engines are typically at about 20 - 30% of the piston stroke, measured from the top dead center OT of the piston, usually provided a plurality of circumferentially distributed lubricating oil nozzles, via which the lubricating oil in the cylinder liner or can be applied to the tread of the cylinder liner.
  • lubricating oil nozzles are provided at two different levels.
  • the upper level lubricating oil nozzles are e.g. in the range of about 10% of the piston stroke measured from TDC, while the lubricating oil nozzles of the lower level are located at about 30% of the piston stroke measured from TDC.
  • both levels are supplied with the same very high-quality and expensive lubricating oil.
  • Corrosive wear takes place predominantly in the region of top dead center OT. There, the running surface of the cylinder liner is exposed to the concentrated combustion gases. On the other hand, but also the highest pressure on the piston rings and the low speed of the piston rings can be difficult or no reliable construction of a lubricating oil film here. In the lower regions, however, experience has shown that wear and also the corrosive attacks on the gray cast iron running surface of the cylinder liners tend to decrease.
  • the object of the invention is therefore to propose an improved apparatus and an improved method for lubricating a reciprocating internal combustion engine, whereby the above-mentioned problems known from the prior art are avoided and the increasingly complex demands on the cylinder lubrication can be taken into account in the future.
  • the aim of the invention is to provide lubrication in any type of engine, e.g. Not only in classic diesel or heavy oil-powered engines, as well as in pure gas engines and especially in modern dual-fuel engines are not only significantly improved, but ultimately the cost of lubrication of the running surfaces of the cylinder liners are significantly reduced.
  • the invention thus relates to a lubricating device for a cylinder liner of a reciprocating internal combustion engine, especially in slow-running two-stroke large diesel engine, in which cylinder liner, a piston along a longitudinal axis between a bottom dead center and a top dead center on a tread of a cylinder wall back and forth movable, with a the first lubricant opening of the lubricating device is provided in a first axial distance from the top dead center in the cylinder wall, that in the operating state, a first lubricant is introduced into the cylinder liner by means of the first lubricant opening and the lubricating device comprises a second lubricant opening, which at a second axial distance from the upper Dead center is provided in the cylinder wall such that in the operating state, a second lubricant by means of the second lubricant opening in the cylinder liner can be introduced.
  • the second lubricant provided by a lubricant supply of the lubricating device at the
  • the invention is based on the essential finding that in order to achieve an optimum operating state of the reciprocating internal combustion engine, a state parameter, in particular the BN value of the lubricant film on the running surface of the cylinder, should preferably be optimized locally.
  • the BN value of the lubricant and thus of the lubricant film on the cylinder surface is to be optimized locally as a function of the distance from top dead center of the piston to the cylinder surface, depending on the operating state or on the type of reciprocating internal combustion engine.
  • the invention therefore provides a lubricating concept in which different types of lubricants are provided along the running surface of a cylinder of a reciprocating internal combustion engine, in particular a two-stroke engine.
  • a lubricant having a high degree of additive and very high thermal stability e.g. a BN160, SAE 80 oil with 0.2g / kWh lubrication.
  • a special lubricant can be introduced, which may supplement the non-existent lubricity of the soot particles or cause less deposits which could cause pre-ignition.
  • a cheaper low-viscous lubricating oil could be injected with adapted additives, such as a BN 70, SAE50 oil and 0.4g / kWh lubrication.
  • these lubricants could also be completely different in nature.
  • they can also be modified, for example, from a favorable base cylinder oil such as from a BN70 by adding additives and other substances, for example to obtain a BN160.
  • the lubrication levels may be switched on only as needed, for example, switching to and from the Emission Control Area (ECA) areas, in which at sea, e.g. Special emission regulations for ships shall apply as simply as possible to the crew.
  • ECA Emission Control Area
  • the engine may be supplied with a plurality of lubricants optimized for the prevailing conditions. For example, in the region of top dead center, a lubricant that can withstand extreme temperatures, pressures, and sulfuric acid corrosion, and at a deeper range, further away from top dead center, a lubricant optimized for the prevailing piston velocity that will safely float the piston rings on the tread.
  • a lubricant that does not drip off and the piston rings in the mixed friction area can not come into contact with the running surface.
  • These funds would therefore have to be introduced at various levels in the cylinder.
  • two to three, or more different levels for the lubricant openings are possible.
  • known nozzles or conveying devices can be used.
  • Lubricating oil conveying devices are preferably used with which the various injection levels can be switched on and off flexibly. Particularly advantageous need a cylinder only a lubricant pump which can promote several lubricants and can be funded independently.
  • the distribution on the running surface of the cylinder liner can be done by also known per se groove shapes or correspondingly profiled piston rings.
  • the injection timing of the lower levels may not be necessary with the exhaust valve still open, the upper levels with the valve closed.
  • the lubricant may e.g. be sprayed before or in the piston ring package.
  • the lower levels could inject the lubricant above, directly into the ring pack, but also below the piston.
  • Fuels with very low sulfur content are preferably used to supply a second level solely with lubricating oil and switch to the highest level when switching to heavy oil with higher sulfur content. Further, with special engine loads or additions of exhaust aftertreatment systems or exhaust bypass valves, a higher amount may be supplied to the uppermost level. For very low load ranges, only e.g. the second highest level can be used to lubricate the cylinder surface.
  • Such a "multi-lube" lubricating device according to the present invention thus offers many new possibilities to operate the cylinder liner with the smallest amount of lubricant required at a precisely matched BN value. And that with massively improved reliability.
  • the lubricating and neutralizing agent is traditionally a lubricating oil with a fixed BN content.
  • a base system oil with a very low value of, for example, BN 5-10 and SAE30 value and modify this with additives to a higher BN value. It is also known to reduce BN levels of BN100 oils by adding system oil.
  • the existing cylinder oil (not system oil) can also be brought to a higher BN and / or viscosity level by addition of appropriate additives, but generally not vice versa.
  • the lubrication level in the region of top dead center, where the piston has a speed of e.g. between 0 - 2m / s has to use a lubricant having a very high BN value, e.g. between 70-250 but also a high viscosity between SAE 50 and 180, with lubricating amounts of this certainly more expensive product of e.g. 0.1 - 0.6g / kWh.
  • the lower lubrication levels can be supplied with cylinder oils with BN values between 15 - 100 depending on the fuel quality. These levels can preferably be placed in a range with piston speed of about 2-15m / s. When using a more favorable lubricating oil, lubricating oil quantities of e.g. 0.2 - 0.9g / kWh are accepted in practice.
  • the ignition of the fuel is used instead of conventional lubricating oil to convey alternative substances to the tread.
  • substances that counteract the corrosion as well as the erosion of the piston rings at high pressures and temperatures Conceivable here are e.g. dry substances or paste-like substances which become liquid at higher temperatures and thus can be conveyed.
  • the second lubricant opening is arranged in the region of scavenging slots of the cylinder liner, wherein in practice a third lubricant opening with respect to the longitudinal axis between the first Lubricant opening and the second lubricant opening may be provided in the cylinder wall.
  • a third lubricant provided by the lubricant supply of the lubricator at the third lubricant port may be different from the first lubricant provided at the first lubricant port and / or different from the second lubricant provided at the second lubricant port.
  • at least one lubricant pump for conveying the first lubricant and / or the second lubricant and / or the third lubricant is often provided in practice, wherein particularly preferably at least two different lubricants, preferably all the lubricants used are conveyed by one and the same lubricant pump.
  • a drive unit by means of a drive unit the supply of the first lubricant to the first lubricant opening and / or the supply of the second lubricant to the second lubricant opening and / or the supply of the third lubricant to the third lubricant opening, in particular using suitable sensors, Operating states and / or by using "look-up tables" in a conventional manner controllable and / or regulated.
  • a lubricating device may comprise a suitable sensor, e.g. the measurement of a characteristic characteristic of the lubricant film on the running surface of the cylinder wall allowed include so that with the aid of a drive unit which are usually designed as a lubricant nozzle lubricant openings can be controlled such that the state parameter of the lubricant film, in particular the BN value of the lubricant film on the tread optimized is.
  • a suitable sensor e.g. the measurement of a characteristic characteristic of the lubricant film on the running surface of the cylinder wall allowed include so that with the aid of a drive unit which are usually designed as a lubricant nozzle lubricant openings can be controlled such that the state parameter of the lubricant film, in particular the BN value of the lubricant film on the tread optimized is.
  • the state of the lubricant film on the running surface of the cylinder wall can be determined by different parameters.
  • the characteristic characteristic in addition to the BN value inter alia, the thickness of the lubricant film and / or the temperature and / or the viscosity and / or the water content and / or the acid content of the lubricant film and thus determine the actual state of the lubricant film. Therefore, by measuring one or more of these characteristic characteristics, the state of the lubricant film on the running surface of the cylinder wall can be determined.
  • the supply is controlled by the lubricant nozzle in the inventive method and / or regulated so that an optimal value of the BN value of the lubricant film adjusts, whereby the tribological running properties are optimized.
  • the state parameter besides the BN value may also be the thickness of the lubricant film and / or the temperature and / or the viscosity and / or the water content and / or the acid content of the lubricant film.
  • the invention further relates to a lubricating method for lubricating a cylinder liner by means of a lubricating device of a reciprocating internal combustion engine, in particular slow-running two-stroke large diesel engine, in which cylinder liner a piston along a longitudinal axis between a lower Dead center and a top dead center on a tread is moved back and forth.
  • a first lubricant opening of the lubricating device is provided at a first axial distance from top dead center in a cylinder wall and a first lubricant is introduced by means of the first lubricant opening in the cylinder liner, wherein the lubricating device comprises a second lubricant opening at a second axial distance from top dead center is provided in the cylinder wall and a second lubricant is introduced by means of the second lubricant opening in the cylinder liner.
  • the second lubricant provided at the second lubricant port by a lubricant supply of the lubricator is set different from the first lubricant provided at the first lubricant port.
  • the second lubricant port is disposed in the region of scavenging ports of the cylinder liner, and a third lubricant port may be provided in the cylinder wall with respect to the longitudinal axis between the first lubricant port and the second lubricant port.
  • a third lubricant which is different from the first lubricant provided at the first lubricant opening and / or different from the second lubricant opening provided at the second lubricant opening, is provided by the lubricant supply of the lubricating device at the third lubricant opening, and / or wherein the first lubricant and / or the second lubricant and / or the third lubricant is conveyed by at least one lubricant pump, wherein advantageously at least two different lubricants, in particular all the lubricants used are conveyed by one and the same lubricant pump.
  • the supply of the first lubricant to the first lubricant opening and / or the supply of the second lubricant to the second lubricant opening and / or the supply of the third lubricant to the third lubricant opening can be controlled and / or regulated by means of a drive unit.
  • an actual value of a state parameter in particular in a known manner by means of a sensor can be detected and / or a desired value of a state parameter depending on an operating parameters of the reciprocating internal combustion engine, in particular depending on a speed and / or load and / or cylinder temperature and / or another operating parameter and / or depending on a composition of a fuel, the lubricant and / or other operating materials, in particular with the aid of a lookup table, which is present in particular in the form of a multi-dimensional data field.
  • the state parameter is particularly preferably a BN value of a lubricant film to which, for example, a predetermined desired value, in particular locally, is optimized.
  • the sensor can be arranged for example in the piston and / or in a piston ring and / or in the cylinder wall and / or in a cylinder cover of the cylinder liner and / or in another component of the reciprocating internal combustion engine.
  • the lubricant is supplied or not supplied to the first lubricant opening and / or the second lubricant opening and / or the third lubricant opening in accordance with a predetermined pattern, in particular supplied or not supplied as a function of a currently applicable environmental protection regulation ,
  • the method according to the invention can take account of one or more of the characteristic parameters, such as the BN value or, for example, the actual thickness of the lubricant film, and by suitable control of the lubricant supply, one or more state parameters, e.g. adjust the BN value or the optimum thickness of the lubricant film.
  • the characteristic parameters such as the BN value or, for example, the actual thickness of the lubricant film
  • the state parameters e.g. adjust the BN value or the optimum thickness of the lubricant film.
  • the state parameter, in particular the BN value or the thickness of the lubricant film is preferably locally optimized.
  • one or more, usually in the form of lubricant nozzles designed lubricating oil holes may be provided either individually or in groups are driven by the drive unit and advantageous at different positions both in the circumferential direction and in axial direction can be distributed over the cylinder wall or even provided in the moving piston.
  • each different lubricant or each a different amount of lubricant are supplied, so that independently of each other various locations on the tread of the cylinder wall of the lubricant film or a state parameter is optimized.
  • the lubricant can be better distributed, for example in the direction of the piston on the running surface of the cylinder liner by the lubricant just before or exactly when the piston passes a certain lubricant nozzle, fed through this particular lubricant nozzle becomes. That is, depending on the movement of the piston in the direction of top dead center or away from it so the lubricant on the tread of the cylinder in the respective direction optimally distributed and the BN value optimally adjustable.
  • the invention also relates to a cylinder liner for a reciprocating internal combustion engine, in particular slow-running two-stroke large diesel engine, in particular diesel engine or gas engine or Dula-fuel engine with a lubricating device according to the present invention or is operable according to a lubricating method of the invention.
  • Fig. 1 schematically is a cylinder liner 4 of a two-stroke large diesel engine with a lubricating device 1 according to the invention shown in section.
  • the two-stroke large diesel engine of Fig. 1 comprises a plurality of cylinder liners 4, wherein for reasons of clarity, only a cylinder liner 4 is shown by way of example.
  • the cylinder liner 4 comprises a cylinder wall 3, which delimits an inner space 43 of the cylinder 4 in a manner known per se in the circumferential direction.
  • a piston 5 is provided, which is arranged with respect to a longitudinal axis A of the cylinder liner 4 along a running surface 2 on the cylinder wall 3 back and forth.
  • the tread 2 is provided on an inner surface 42 of the cylinder wall 3.
  • a first lubricant port 61, a second lubricant port 62 and a third lubricant port are arranged, which are fed by a metering device 6 in a conventional manner with lubricant 7, so that applied in the operating state, a lubricant film on the tread 2 of the cylinder wall 3 can be.
  • a sensor device 8 is provided with a drive unit 81, and the drive unit 81 is in communication with the metering device 6 of a lubricant reservoir 60 and a sensor 82, which Ssensor 82 in the operating state communicates with the interior 43 of the cylinder 4 by means of communication and thus with the metering device 6 is signal connected, that in the operating state with respect to the longitudinal axis A of Cylinder liner 4, a position X of the piston 5 by means of the position sensor 82 is detectable, and the lubricant 7 in dependence on the detected position X of the piston 5 through the lubricant nozzle 61 in the cylinder 3 can be introduced.
  • further sensors are provided at the axial height and / or in the circumferential direction, which may also be position sensors, but in particular sensors with which a state parameter of the lubricant film, in particular the BN value of the lubricant film 41 can be determined.
  • the control unit 81 preferably comprises a data processing system not explicitly shown here, with which the signals of the sensor 82 can be evaluated, so that the lubricant nozzles 61, 63, 62 are controlled such that the lubricant 7 at an optimal time and in an optimal chemical composition ,
  • a data processing system not explicitly shown here, with which the signals of the sensor 82 can be evaluated, so that the lubricant nozzles 61, 63, 62 are controlled such that the lubricant 7 at an optimal time and in an optimal chemical composition ,
  • an optimal BN value in the cylinder liner 4 can be introduced.
  • the lubricating device 1 is designed and operated so that the lubricant is sprayed onto the piston skirt of the piston 5, preferably in the piston ring packing.
  • the injection of the lubricating oil can also take place at a different crank angle.
  • the first lubricant opening 61 of the lubricating device 1 is provided at a first axial distance X1 from top dead center TDC in the cylinder wall 3 in such a way that a first lubricant can be introduced into the cylinder liner 4 by means of the first lubricant opening 61 in the operating state.
  • the lubricating device 1 comprises a second lubricant opening 62, which is provided in a second axial distance X2 from top dead center OT in the cylinder wall 3, that in the operating state, a second lubricant by means of the second lubricant opening 2 in the cylinder liner 4 can be introduced.
  • the second lubricant provided by the lubricant reservoir 60 of the lubricating device 1 at the second lubricant port 62 in the operating state is different from the first lubricant provided at the first lubricant port 61.
  • the second lubricant opening 62 is arranged in the region of scavenging slots 40 of the cylinder liner 4, wherein a third lubricant opening 63 is provided in the cylinder wall 3 with respect to the longitudinal axis A between the first lubricant opening 61 and the second lubricant opening 62.
  • the third lubricant provided by the lubricant reservoir 60 of the lubricator 1 at the third lubricant port 63 is different from the first lubricant provided at the first lubricant port 61 and / or different from the second lubricant provided at the second lubricant port 62.
  • the second lubricant provided via the second lubricant opening 62 is, as explained above, optimized for use in the region of the scavenging slots 40.
  • the lubricants are conveyed to the lubricant openings 61, 62, 63 by a lubricant pump (not shown in detail), wherein at least two different lubricants, preferably all the lubricants used, are conveyed by one and the same lubricant pump.
  • a particularly preferred embodiment is shown with two arranged at different axial heights sensors 82 for performing a method according to the invention, wherein a setpoint for the second point and / or for the duration and / or amount of lubricant of the injection and or for the chemical composition, in particular BN value of the lubricant 7 in the cylinder liner 4 as a function of different operating parameters B of the reciprocating internal combustion engine, in particular as a function of the rotational speed and / or the load and / or the cylinder temperature and / or another operating parameter B and / or in dependence on the Composition of the fuel used and / or the lubricant and / or other operating materials, using a look-up table LT, which is here in the specific example in the form of a multi-dimensional data field is determined.
  • the timing and / or duration and / or amount and / or chemical composition of the lubricant injection will while optimized in the operating state of the reciprocating internal combustion engine, for example, to the determined using the look-
  • the sensor 8 which may be, for example, a passive structure-borne sound sensor for the detection of structure-borne sound waves from the reciprocating internal combustion engine, chemical sensor or any other suitable sensor and of course also in a cylinder cover, not shown here and / or in a cylinder liner 4 adjacent component of Reciprocating internal combustion engine can be arranged, for example, one with the current position X of the piston 5 or a corresponding to the time course of the position X measured variable or another measured variable already described above determined and the measured value of the drive unit 81, in particular a data processing system and Control means may include supplied. It is preferred, as in Fig. 2 schematically shown, a plurality of axially offset in the axial direction A, or circumferentially offset position sensors 82 for determining the position X of the piston 5 is provided.
  • sensors 82 can advantageously be used in practice. Particularly preferred are as in Fig. 3 have also described pressure sensors 82 for measuring gas pressure or the time dependence of the gas pressure inside the cylinder 4, pressure characteristics which are characteristically related to the position X of the piston 5 or the chemical composition of the lubricant film in the cylinder 4 determine other parameters.
  • measuring devices may be provided which determine various operating parameters B, such as, inter alia, the rotational speed, the load or the cylinder temperature of the reciprocating internal combustion engine and optionally this additionally the driver 81 perform.
  • a Look-UpTable LT which is schematically exemplified in FIG Fig. 2a is shown.
  • the look-up table LT is a two- or multi-dimensional data field, with the aid of, for example, from various relevant current and / or for the reciprocating internal combustion engine specific global operating parameters B and / or depending on the composition of the operating materials used, in particular the fuel or lubricants used, and / or taking into account other relevant factors, such as specific environmental or emission regulations in special operating conditions or operating locations, a current time and / or the duration of the injection and / or the chemical composition of the lubricant 7 in the cylinder liner 4 is determined , The setpoint determined in this way is related to the values measured by the sensor 82.
  • a signal is then generated with the aid of the drive unit 81 to the metering device 6 for controlling the lubricant nozzle 61 so that the lubricant nozzle 61 introduces lubricant 7 into the cylinder liner 4 at the right time and for the correct time period and in the desired chemical composition.
  • the resources used and their properties can play a central role for the optimal lubricant entry , These can also be used to determine the desired value advantageous and constantly monitored during operation by suitable measuring device.
  • Fig. 3 is a further embodiment of a lubricating device according to the invention shown schematically.
  • the Fig. 3 shows a cross section through a cylinder 4 according to Fig. 2 along the section line II. From the representation of Fig. 3 It can be seen that a plurality of lubricant nozzles 61, in the present case four lubricant openings 61 are provided at a common axial position in the cylinder wall 3 at the axial height of the illustrated lower sensor 82, whereby the lubrication in the circumferential direction can be optimized.
  • the representation of the lubricant opening 61 is to be understood by way of example analogously also for the lubricant openings 62, 63 or other lubricant openings, as it is readily apparent to those skilled in the art. It goes without saying that also in the axial direction offset lubrication nozzles 61 may be provided.
  • the lubricating device according to the invention and the method of the present invention not only significantly increase the service life of the piston, piston rings and cylinder running surface, but also simultaneously minimize the lubricant consumption and extend the maintenance intervals appreciably.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP15180885.4A 2015-08-13 2015-08-13 Dispositif de lubrification pour revetement de cylindre, procede de lubrification et revetement de cylindre Withdrawn EP3130771A1 (fr)

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EP15180885.4A EP3130771A1 (fr) 2015-08-13 2015-08-13 Dispositif de lubrification pour revetement de cylindre, procede de lubrification et revetement de cylindre

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EP15180885.4A EP3130771A1 (fr) 2015-08-13 2015-08-13 Dispositif de lubrification pour revetement de cylindre, procede de lubrification et revetement de cylindre

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH613495A5 (en) 1976-04-15 1979-09-28 Sulzer Ag Cylinder lubrication device for a piston internal combustion engine
JPS58165515A (ja) * 1982-03-26 1983-09-30 Mitsui Eng & Shipbuild Co Ltd デイ−ゼル機関のシリンダ注油方法および装置
JPH01125509A (ja) * 1987-11-09 1989-05-18 Mitsubishi Heavy Ind Ltd デイーゼル機関のシリンダーライナー注油装置
JPH0359408U (fr) * 1989-10-12 1991-06-12
EP0652426A1 (fr) 1993-11-09 1995-05-10 New Sulzer Diesel AG Méthode de reconnaissance des perturbations dans le functionnement d'un moteur à diesel
WO2000028194A1 (fr) 1998-11-05 2000-05-18 Hans Jensen Lubricators A/S Systeme de lubrification pour moteurs diesel de grande taille
EP1006271A2 (fr) 1998-12-01 2000-06-07 Wärtsilä NSD Schweiz AG Procédé et dispositif pour la détermination du statut d'une pièce mobile dans le cylindre d'un moteur à combustion interne
EP1582706A2 (fr) * 2004-03-31 2005-10-05 Mitsubishi Heavy Industries, Ltd. Moteur à combustion interne ayant un dispositif de lubrification du cylindre
DE102013002743A1 (de) * 2013-02-19 2014-08-21 Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland Verfahren und Vorrichtung zur Zylinderschmierung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH613495A5 (en) 1976-04-15 1979-09-28 Sulzer Ag Cylinder lubrication device for a piston internal combustion engine
JPS58165515A (ja) * 1982-03-26 1983-09-30 Mitsui Eng & Shipbuild Co Ltd デイ−ゼル機関のシリンダ注油方法および装置
JPH01125509A (ja) * 1987-11-09 1989-05-18 Mitsubishi Heavy Ind Ltd デイーゼル機関のシリンダーライナー注油装置
JPH0359408U (fr) * 1989-10-12 1991-06-12
EP0652426A1 (fr) 1993-11-09 1995-05-10 New Sulzer Diesel AG Méthode de reconnaissance des perturbations dans le functionnement d'un moteur à diesel
WO2000028194A1 (fr) 1998-11-05 2000-05-18 Hans Jensen Lubricators A/S Systeme de lubrification pour moteurs diesel de grande taille
EP1006271A2 (fr) 1998-12-01 2000-06-07 Wärtsilä NSD Schweiz AG Procédé et dispositif pour la détermination du statut d'une pièce mobile dans le cylindre d'un moteur à combustion interne
EP1582706A2 (fr) * 2004-03-31 2005-10-05 Mitsubishi Heavy Industries, Ltd. Moteur à combustion interne ayant un dispositif de lubrification du cylindre
DE102013002743A1 (de) * 2013-02-19 2014-08-21 Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland Verfahren und Vorrichtung zur Zylinderschmierung

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