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EP2194244A1 - Dispositif de lubrification et procédé destiné à la lubrification d'une surface de roulement d'une paroi de cylindre - Google Patents

Dispositif de lubrification et procédé destiné à la lubrification d'une surface de roulement d'une paroi de cylindre Download PDF

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Publication number
EP2194244A1
EP2194244A1 EP09175785A EP09175785A EP2194244A1 EP 2194244 A1 EP2194244 A1 EP 2194244A1 EP 09175785 A EP09175785 A EP 09175785A EP 09175785 A EP09175785 A EP 09175785A EP 2194244 A1 EP2194244 A1 EP 2194244A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
lubricant
piston
internal combustion
combustion engine
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.)
Withdrawn
Application number
EP09175785A
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German (de)
English (en)
Inventor
Matthias Dr. Amoser
Konrad Räss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP09175785A priority Critical patent/EP2194244A1/fr
Publication of EP2194244A1 publication Critical patent/EP2194244A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • 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
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F01M2001/083—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating cylinders

Definitions

  • the invention relates to a detection device, and a method for operating, in particular for lubricating a running surface of a cylinder wall of a cylinder of a reciprocating internal combustion engine, in particular a slow-running large diesel engine, and a reciprocating internal combustion engine 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.
  • 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.
  • 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.
  • 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 dosage and the time at which the lubricant is introduced into the cylinder of the internal combustion engine 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.
  • 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 ,
  • BN value of the lubricant is a measure.
  • 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.
  • the piston rings, piston ring groove and running surface can be ground in and optimally adjusted 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 tread will wear differently both circumferentially and longitudinally depending on the number of hours of operation 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.
  • Hydrodynamic lubrication is when, between the mating partners, so for example between the tread a cylinder wall and the piston ring of a piston, a lubricant film is formed of such thickness that the surfaces of the mating partner are separated from each other by the lubricant film, so that they do 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 was preferably selected to set a state of hydrodynamic lubrication between the mating partners.
  • the optimum point in time may depend on many parameters, in particular on the different operating states under which the internal combustion engine is operated. Many of the parameters that can play a role are the same ones that are relevant to the correct lubricant film thickness and have already been mentioned in the beginning. Above all, the right time naturally depends primarily on the various lubrication methods described above. Of course, the timing for the injection of the lubricant is naturally sensitive to whether the lubricant is e.g. is to be fed into the purge air or, for example, directly on the passing piston, e.g. to be injected into the piston ring package of the piston.
  • the timing of the lubrication oil injection also depends on static and dynamic geometric parameters of the engine, in particular on the position of the piston between UT and TDC relative to the location of the lubricant nozzle. That is, to ensure optimum lubricant injection into the cylinder, the position, ie the position X of the piston with respect to the longitudinal axis of the cylinder at the time of lubricant injection must be known as accurately as possible.
  • the position X of each piston between UT and OT in the cylinder has been determined by measuring the instantaneous crank angle of the internal combustion engine for all pistons of the engine from a single central crank angle measurement by various methods. For example, via a chain drive, which is directly coupled with a shaft to the lubricant pump.
  • crank angle of the internal combustion engine is measured in the operating state until today, and the position of all pistons in the cylinder is calculated from this central crank angle measurement. From this calculated from the measured crank angle position X of a piston in the cylinder, the time of the lubricant injection is then calculated in the cylinder in question.
  • the reason for this erroneous position determination is, inter alia, the elasticity of the engine and its movable and immovable parts and the massive vibrations and torsional movements of the crankshaft.
  • the top dead center OT of the piston is adjusted, for example by means of special washers or spacers, ie at a suitable point on the attachment of the piston, piston rod, the crosshead or other fastener elements of the piston called “compression shims" individual for each cylinder, thereby optimizing the compression in each cylinder.
  • the object of the invention is therefore to propose an improved reciprocating internal combustion engine and in particular an improved lubricating device and an improved method for operating a reciprocating internal combustion engine, in particular for lubricating a running surface of a cylinder of a reciprocating internal combustion engine, by which the problems described above are avoided and through the use of improved Control and / or regulation of various components or processes during operation of the Hubkolbenbrennkraftmaschine be made possible and in particular an optimal time for the introduction of the lubricating oil can be determined in the cylinder.
  • the invention thus relates to a detection device for a reciprocating internal combustion engine with a cylinder, in particular slow-running two-stroke large diesel engine, in which cylinder a piston along a tread between a bottom dead center and a top dead center is arranged back and forth, one of a metering device with a Lubricant-fed lubricant nozzle is provided in such a cylinder wall of the cylinder, that in the operating state, the lubricant is introduced by means of the lubricant nozzle in the cylinder.
  • the detection device comprises a sensor device with a drive unit, the drive unit being signal-connected to the metering device and a position sensor, which position sensor communicates in the operating state with an interior of the cylinder in such a way that in the operating state with respect to an axial direction of the cylinder a position of the piston is detectable by means of the position sensor, and the reciprocating internal combustion engine is controllable and / or controllable in dependence on the position of the piston.
  • the invention relates in a specific embodiment of a 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.
  • a piston is reciprocable along the tread between a bottom dead center and a top dead center, wherein a supplied by a metering device with a lubricant lubricant nozzle is provided in the cylinder wall, that in the operating state, the lubricant by means of the lubricant nozzle in the cylinder can be introduced.
  • a sensor device is provided with a drive unit, wherein the drive unit with the metering device and a position sensor, which position sensor communicates in the operating state with an interior of the cylinder metrologically communicating, is signal-connected such that in the operating state with respect to an axial direction of the cylinder Position of the piston is detectable by means of the position sensor.
  • the lubricant can be introduced into the cylinder as a function of the detected position of the piston through the lubricant nozzle.
  • the present invention makes it possible for the first time to determine or measure the axial position of the piston in the cylinder directly, independently of the crank angle of the internal combustion engine. This makes it possible, for example, for the first time to optimally set the time or the time interval for the introduction of the lubricant in the cylinder.
  • a vibration damper is known to generate a defined force in a defined direction against an internal engine force.
  • the vibration damper must therefore be synchronous with this engine power, i. work synchronously to the crankshaft. If the vibration absorber is not directly driven by the crankshaft, the drive unit, that is, the engine of the vibration absorber of the reciprocating internal combustion engine, which has e.g. a two-stroke large diesel engine is received pulses that synchronize the vibration damper with the engine.
  • the determined according to the present invention actual piston position can be used advantageously.
  • the position of the piston is determined by a direct measurement and not indirectly via the measurement of the crank angle, the inventively determined position of the piston in the cylinder is no longer due to the above-described errors due to the elasticity of the engine, the dynamic Vibration and torsional movements or distorted due to the fine adjustment of the compression by means of compression shims or other error influences.
  • the position sensor is arranged in the region of the cylinder wall, whereby preferably but not necessarily at least two position sensors offset with respect to the axial direction of the cylinder are provided for one and the same cylinder of the reciprocating internal combustion engine.
  • two or more offset with respect to the axial direction of the cylinder position sensors for one and the same cylinder of the reciprocating internal combustion engine are provided.
  • two or more position sensors not offset with respect to the axial direction of the cylinder, can be provided for one and the same cylinder of the reciprocating internal combustion engine. This means that two or more sensors can be placed in the same axial position in the circumferential direction in the cylinder wall, whereby the measurement accuracy can also be increased.
  • At least one position sensor is provided for each cylinder of the reciprocating internal combustion engine, so that the exact position of the piston in each cylinder can be determined individually.
  • At least one position sensor with respect to the axial direction of the cylinder is arranged at substantially the same height as the lubricant nozzle in the region of the cylinder wall.
  • the position of the piston is correlated in time with the time of injection of the lubricant. This is particularly then, but not only advantageous if the lubricant is to be injected eg directly to the passing piston wall, for example, directly into the piston ring package of the piston.
  • the time of the measurement of the position of the piston and the injection time derived therefrom for the lubricant are very close together, a particularly precise injection can be ensured.
  • the position sensor e.g. can also be arranged above a top dead center of the piston in the cylinder, for example, in the cylinder wall above the top dead center or else in or in the region of the cylinder cover can be arranged. This may be advantageous in particular when the position sensor is a pressure sensor which measures the pressure or the time pressure curve for determining the position of the piston in the cylinder.
  • a pressure sensor may advantageously be provided as a position sensor. If a pressure sensor is used as a position sensor, the position of the piston is determined from the measured pressure and / or from the time profile of the pressure in the cylinder, wherein advantageously, but not necessarily, a look-up table is used in which different machines or operating conditions specific parameters are stored, from which the axial position of the piston in the cylinder and thus the exact time for injecting the lubricant by means of the lubricant nozzle can then be determined on the basis of the pressure data determined with the position sensor. It is understood that the use of a look-up table described below is not limited to the use of pressure sensors but can also be advantageously used in conjunction with other types of position sensors which will be discussed below.
  • the time or the time interval for the introduction of the lubricant into the cylinder is a function of various operating parameters 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 other operating parameters and / or in Depending on the composition of a fuel and / or the lubricant and / or other operating materials, using the look-up table, which may be in the form of a multi-dimensional data field determined, and the time or interval for the introduction of the lubricant in the Cylinder optimized by means of the lubricant nozzles.
  • the look-up table which is loaded, for example, as a database into a data processing system, which may be part of the control unit, important, are stored for determining the optimal relevant time data for the lubricating oil injection.
  • current operating parameters such as speed and / or load and / or cylinder temperature and / or temperature in the combustion chamber and / or other current operating parameters are determined from which then together with the data stored in the look-up table and the measurement of the position sensor, a desired value or the time interval of the lubricant injection is determined for each operating state.
  • the resources used and their properties for example the fuel used, especially its sulfur content and / or the type of lubricant used and / or the BN value of the lubricant, for the optimal injection time or for the optimal duration the lubricant injection can play a central role, they can also be used to determine the desired value advantageous and constantly monitored if necessary or advantageous during operation by suitable measuring device.
  • each sensor can advantageously be used as a position sensor with which the position of the piston in the cylinder can be determined with sufficient accuracy.
  • the position sensor may be an electrical position sensor.
  • a known capacitive sensor or an inductive with which a capacitance of the capacitive sensor or an inductance of the inductive sensor changes when approaching or passing the piston on the sensor, so that from the position of the piston and thus the time for Introducing the lubricating oil can be determined.
  • sensors such as active or passive ultrasonic sensors, or structure-borne sound sensors, for example, the piezoelectric effect for the measurement or optical sensors or just any other suitable sensor with which the position of the piston in the cylinder can be determined suitable , in particular, can be determined as a function of time.
  • any combination of different sensor types can be provided with the position of the piston is particularly advantageous in the cylinder or the time course of the position of the piston in the cylinder can be determined.
  • the invention does not relate to the introduction of lubricating oil alone, but in specific embodiments can of course by means of the detection device according to the invention, for example, an injection of fuel into the cylinder and / or a control of an exhaust valve of the cylinder and / or the introduction of a starting air into the cylinder and / or a vibration damper of the reciprocating internal combustion engine in dependence on the detected position of the piston can be controlled and / or regulated.
  • the invention further relates to a method for operating a reciprocating internal combustion engine with a cylinder, in particular slow-running two-stroke large diesel engine, in which cylinder a piston along the tread between a bottom dead center and a top dead center is arranged back and forth, one of a metering device with a lubricant supplied lubricant nozzle is provided in the cylinder wall, and a lubricant is introduced by means of the lubricant nozzle in the cylinder, wherein a detection device is provided with a sensor device comprising a drive unit, wherein the drive unit is signal-connected to a metrologically communicating with an interior of the cylinder position sensor, with respect to an axial direction of the cylinder, a position of the piston is detected by means of the position sensor, and the reciprocating internal combustion engine in dependence on the detected position of the piston ns controlled and / or regulated.
  • the invention relates in a specific embodiment of a method 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.
  • a piston along the Running surface between a bottom dead center and a top dead center arranged reciprocable, wherein provided by a metering device with a lubricant lubricant nozzle provided in the cylinder wall and a lubricant is introduced by means of the lubricant nozzle in the cylinder.
  • a sensor device is provided with a drive unit, wherein the drive unit is signal-connected to the metering device and to a position sensor which communicates metrologically with an interior of the cylinder. With respect to an axial direction of the cylinder, a position of the piston is detected by means of the position sensor, and the lubricant is introduced into the cylinder through the lubricant nozzle depending on the detected position of the piston.
  • a plurality of position sensors are provided for one and the same cylinder of the reciprocating internal combustion engine.
  • the lubricant is introduced into the interior of the cylinder before the piston passes through the lubricant nozzle as it moves along the axial direction.
  • the lubricant is introduced into the interior of the cylinder while the piston passes along the axial direction of the lubricant nozzle, in particular the lubricant is injected onto the piston ring package of the piston.
  • the position of the piston with respect to the axial direction in the amount of the position of the lubricant nozzle can be detected.
  • the position of the piston is detected above the top dead center with the position sensor, in particular with a position sensor which is provided in the cylinder wall or on the cylinder cover above top dead center, the position sensor preferably, but not necessarily a pressure sensor or an active or passive ultrasonic sensor or a structure-borne sound sensor.
  • any type of suitable position sensor can be provided quite generally, in particular also any suitable type of electrical sensor.
  • the invention relates to a reciprocating internal combustion engine with a detection device described above which is operated in the operating state according to a method of the present invention.
  • a cylinder of a two-stroke large diesel engine with a lubricating device 1 according to the invention is shown in section.
  • the two-stroke large diesel engine of Fig. 1 comprises a plurality of cylinders 4, wherein for reasons of clarity, only one cylinder 4 is shown by way of example.
  • the cylinder 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 an axial direction A of the cylinder 4 along a running surface 2 of the cylinder wall 3 back and forth.
  • the tread 2 is in the specific example of Fig.
  • a surface layer 42 which is applied to a cylinder wall surface 41, for example by thermal spraying.
  • a lubricant nozzle 61 is arranged, which is fed by a metering device 6 in a conventional manner with lubricant 7, so that in the operating state Lubricant film on the tread 2 of the cylinder wall 3 can be applied.
  • a sensor device 8 is provided with a drive unit 81, and the drive unit 81 is signal-connected with the metering device 6 and a position sensor 82, which position sensor 82 communicates in the operating state with the interior 43 of the cylinder 4 in such a way that in the operating state with respect to the axial direction A of the cylinder 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.
  • an electrical position sensor 82 is shown, with which the position X of the piston 5 is detected in the operating state of the two-stroke large diesel engine.
  • each cylinder 4 of the reciprocating internal combustion engine may each have a plurality of identical or different position sensors 82 and a plurality of lubricant nozzles 61, which may be suitably provided at different locations in and / or on the cylinder wall 3.
  • the drive unit 81 preferably comprises a data processing system, not explicitly shown here, with which the signals of the position sensor 82 can be evaluated, so that the lubricant nozzle 61 can be controlled such that the lubricant 7 can be introduced into the cylinder 4 at an optimum time.
  • the lubricating device 1 is configured and so operated, that the lubricant is sprayed on the piston skirt, preferably in the piston ring packing.
  • Fig. 2 schematically shows a particularly preferred embodiment variant with two position sensors 82 for performing a method according to the invention, wherein a desired value for the second point and / or for the period of injection of the lubricant 7 in the cylinder 4 in response to different operating parameters B of the reciprocating internal combustion engine, in particular as a function from the rotational speed and / or the load and / or the cylinder temperature and / or another operating parameter B and / or depending on the composition of the fuel used and / or the lubricant and / or other operating materials, with the aid of a look-up table LT , which is here in the special example in the form of a multi-dimensional data field, is determined.
  • the time or the duration of the lubricant injection is optimized in the operating state of the reciprocating internal combustion engine to the determined using the look-up table LT setpoint.
  • the position sensor 8 which is for example a passive structure-borne sound sensor for the detection of structure-borne sound waves from the reciprocating internal combustion engine and which can be arranged, of course, for example in a cylinder cover, not shown here and / or in a cylinder 4 adjacent component of the reciprocating internal combustion engine, is for example a measured with the current position X of the piston 5 or a corresponding to the time course of the position X measured value and the measured value of the drive unit 81, which in particular comprises a data processing system and control means supplied. It is preferred, as in Fig. 2 schematically shown, a plurality of offset in the axial direction A position sensors 82 for determining the position X of the piston 5 is provided.
  • the position sensors 82 are passive structure-borne sound sensors 82, inter alia, by determining propagation time differences of the signals detected by the position sensors 82 and / or using the known technique of correlating signals, i. the investigation of the corresponding correlation function of the signals, the position X of the piston 5 are determined in particular also time-dependent.
  • position sensors 82 can advantageously also be used in practice instead of structure-borne noise sensors 82. Particularly preferred are as in Fig. 3 also described pressure sensors 82 with which the gas pressure or the time dependency of the gas pressure inside the cylinder 4 can be measured, pressure characteristics which are characteristically related to the position X of the piston 5 in the cylinder 4.
  • the piston 5 may also contain a marking agent, e.g. contain a magnetic marker, so that the piston 5 is better detected by the position sensor 82.
  • measuring devices may be provided which determine various operating parameters B, such as, inter alia, the speed, the load or the cylinder temperature of the reciprocating internal combustion engine and optionally additionally supply the control device 81.
  • a look-up table LT can be used, which is illustrated schematically 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 used lubricant and / or taking into account other relevant factors, a current time and / or the duration of injection of the lubricant 7 in the cylinder 4 is determined.
  • the setpoint determined in this way is related to the position X of the piston 5 determined by the position sensor 82, in this case the actual position X of the piston 5 in the cylinder 4. From this, 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 4 at the correct time and for the correct time.
  • the look-up table LT various, relevant for the determination of an optimal lubricant entry into the cylinder 4 data are stored.
  • current operating parameters B such as, for example, rotational speed and / or load and / or cylinder temperature and / or the temperature in the combustion chamber and / or other current operating parameters B are preferably determined with suitable devices, which are already known for reciprocating internal combustion engines, from which then in common
  • the setpoint value for an optimal introduction of lubricant into the cylinder 4 is again and again determined for each operating state.
  • the resources used and their properties such as the fuel used, especially its sulfur content and / or the nature of the used lubricant and / or the BN value of the lubricant itself, 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 1-1. From the representation of Fig. 3 It can be seen that a plurality of lubricant nozzles 61, in the present case four lubricant nozzles 61 are provided at a common axial position in the cylinder wall 3 at the axial height of the illustrated lower position sensor 82, whereby the lubrication in the circumferential direction can be optimized.
  • the only difference to the device of Fig. 2 is that the position sensors 82 are pressure sensors 82 and that no look-up table is used to evaluate the sensor signals.
  • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP09175785A 2008-12-02 2009-11-12 Dispositif de lubrification et procédé destiné à la lubrification d'une surface de roulement d'une paroi de cylindre Withdrawn EP2194244A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09175785A EP2194244A1 (fr) 2008-12-02 2009-11-12 Dispositif de lubrification et procédé destiné à la lubrification d'une surface de roulement d'une paroi de cylindre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08170463 2008-12-02
EP09175785A EP2194244A1 (fr) 2008-12-02 2009-11-12 Dispositif de lubrification et procédé destiné à la lubrification d'une surface de roulement d'une paroi de cylindre

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DE202012100653U1 (de) * 2012-02-27 2013-05-28 Makita Corp. Brennkraftmaschine mit verbesserter Zündzeitpunktsteuerung und Zündzeitpunktsteuerung hierzu
EP2620607A1 (fr) * 2012-01-30 2013-07-31 Wärtsilä Schweiz AG Ensemble piston-cylindre et procédé d'alimentation en lubrifiant l'ensemble piston-cylindre pour un moteur à combustion interne
WO2017207659A1 (fr) * 2016-05-31 2017-12-07 Avl List Gmbh Moteur à piston et procédé et dispositif de diagnostic et/ou de commande d'un moteur à pistons alternatifs
US11421587B2 (en) 2016-05-31 2022-08-23 Avl List Gmbh Method and system for diagnosing and/or controlling a reciprocating engine having a variable compression ratio

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JP5552148B2 (ja) * 2012-09-28 2014-07-16 富士重工業株式会社 エンジンの行程判別装置
CN103277198A (zh) * 2013-05-31 2013-09-04 中国人民解放军理工大学 精确控制电液驱动可变气门
CN103470392B (zh) * 2013-09-30 2015-07-01 庄景阳 点火角度控制汽缸的润滑装置
JP7309110B2 (ja) * 2017-12-07 2023-07-18 株式会社三井E&S Du エンジンシステム
DK179945B1 (en) * 2017-12-13 2019-10-21 Hans Jensen Lubricators A/S A large slow-running two-stroke engine and a method of lubricating it and a controller for such engine and method
CN113790684A (zh) * 2021-09-29 2021-12-14 西南石油大学 一种可实时确定活塞位置的中间容器

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CH613495A5 (en) 1976-04-15 1979-09-28 Sulzer Ag Cylinder lubrication device for a piston internal combustion engine
DE2639839A1 (de) * 1976-09-03 1978-03-09 Burmeister & Wains Mot Mask Ausruestung zur beurteilung des schmierzustandes zwischen einem stationaeren und einem beweglichen maschinenteil durch messen des elektrischen widerstandes zwischen den maschinenteilen
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
GB2345738A (en) * 1999-01-18 2000-07-19 Man B & W Diesel Gmbh I.c. engine cylinder lubricating system and connecting member
US20030047386A1 (en) * 1999-12-24 2003-03-13 Ian Sherrington Lubrication control system
EP1505270A1 (fr) 2003-08-07 2005-02-09 Wärtsilä Schweiz AG Procède et dispositif pour lubrifier un moteur à combustion interne
DE102005024046A1 (de) * 2005-05-25 2006-11-30 Robert Bosch Gmbh Brennkraftmaschine mit Induktionsspule zur Bestimmung von Kolbenstellung und -geschwindigkeit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620607A1 (fr) * 2012-01-30 2013-07-31 Wärtsilä Schweiz AG Ensemble piston-cylindre et procédé d'alimentation en lubrifiant l'ensemble piston-cylindre pour un moteur à combustion interne
DE202012100653U1 (de) * 2012-02-27 2013-05-28 Makita Corp. Brennkraftmaschine mit verbesserter Zündzeitpunktsteuerung und Zündzeitpunktsteuerung hierzu
WO2017207659A1 (fr) * 2016-05-31 2017-12-07 Avl List Gmbh Moteur à piston et procédé et dispositif de diagnostic et/ou de commande d'un moteur à pistons alternatifs
AT518694A1 (de) * 2016-05-31 2017-12-15 Avl List Gmbh Hubkolbenmaschine sowie Verfahren und Vorrichtung zur Diagnose und/oder Steuerung einer Hubkolbenmaschine
AT518694B1 (de) * 2016-05-31 2019-08-15 Avl List Gmbh Hubkolbenmaschine sowie Verfahren und Vorrichtung zur Diagnose und/oder Steuerung einer Hubkolbenmaschine
US11371426B2 (en) 2016-05-31 2022-06-28 Avl List Gmbh Reciprocating piston machine and method and device for diagnosing and/or controlling a reciprocating piston machine
US11421587B2 (en) 2016-05-31 2022-08-23 Avl List Gmbh Method and system for diagnosing and/or controlling a reciprocating engine having a variable compression ratio

Also Published As

Publication number Publication date
KR20100062945A (ko) 2010-06-10
CN101749072A (zh) 2010-06-23
JP2010133412A (ja) 2010-06-17

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