KR100405373B1 - A method of lubricating a cylinder in an internal combustion engine, and a cylinder lubricating system - Google Patents

Abstract

The cylinder 1 of the internal combustion engine is lubricated by at least one lubricator 10 which supplies lubricating oil to at least one lubrication point of the cylinder. The electronic controller 17 activates the lubricator based on the measured value of the pressure change of the cylinder in the current operating mode of the engine during one or more engine cycles.

Description

A METHOD OF LUBRICATING A CYLINDER IN AN INTERNAL COMBUSTION ENGINE, AND A CYLINDER LUBRICATING SYSTEM}

The present invention relates to a cylinder lubrication method of an internal combustion engine which electronically controls at least one lubrication device for supplying lubricating oil to at least one lubrication point of a cylinder of the internal combustion engine by an associated controller.

The above lubrication method is known from the applicant's Danish patent application No. 1119/96, in which the lubrication device is used to lubricate a plurality of lubrication points of the cylinder each time the lubrication device is operated by an electronic control device. It has an actuator piston which drives several dosing pistons in common operation. The hydraulically driven lubricator operates at high speed, supplying lubricant to the lubrication point at an advantageously high lubricant pressure.

It has been required for many years to deliver lubricant to a cylinder while the piston passes the lubrication point. See, for example, Danish Patent No. 812575 in 1954, Swiss Patent 406 735 in 1966, German Patent No. 28 27 626 in 1979 and European Patent No. 0 678 152 in 1997.

In fact, due to various factors affecting the actual delivery time of the lubricating oil, it is understood that the above requirement is very difficult to realize. Just a few examples. The delay between the operation of the lubricator and the delivery of lubricating oil at the lubrication point depends in particular on the viscosity of the lubricating oil. The actual delay is an absolute time interval, but the delay for correct lubrication varies with the engine speed (rpm). In known electronically actuated lubricators, the actuation is based on the angular position of the crankshaft. During operation, the crankshaft twists slightly depending on the current load of the engine and the distance of the cylinder from the signal device detecting the rotational movement of the shaft, which results in variable inaccuracy in lubrication time.

It is an object of the present invention to improve the delivery of lubricating oil to at least one lubrication point of a cylinder.

1 is a partial cross-sectional view of a cylinder formed in accordance with the present invention.

2 is another embodiment of a lubrication system according to the invention.

3 to 6 are graphs showing the continuous state of the pressure measured in the cylinder during the compression stroke.

7 is a graph showing the continuous state of pressure measured in the same cylinder during the expansion stroke.

8 and 9 are block diagrams schematically showing a processing sequence of data.

10 is a side view of the connecting member according to the present invention.

In view of this object, the method according to the invention controls the operation of the lubricator during one or more engine cycles by means of an electronic control unit, based on a measured value of the changing cylinder pressure in the cylinder during operation of the engine. It is characterized by.

By measuring the actual cylinder pressure in the cylinder, a true view of the current piston operation is the basis for allowing the piston to deliver lubricant over a very short period of time as it passes through one or more lubrication points. to provide. The measurement provides the electronic control device with information about when the piston passes the lubrication point and the time interval between each passage. The control device should provide the following actuation signal based on such data and any information stored about the delay from the delivery of the desired dose and actuation signal to the supply of the lubricant to the actual lubrication point. Calculate the timing. When the engine is operating in the operating mode associated with lubrication, the changing cylinder pressure is measured, so that the current data is updated continuously, thus continuously adapting to the operating time as the current piston moves in the cylinder. do.

Although cylinder pressure can be measured by techniques known in the art, such as strain gauges mounted on the cover studs of the cylinder cover, the measurement of the overall pressure level in the cylinder provides a relatively rough indication of the current position and movement of the piston. I only present it.

The pressure change generated by the piston ring installed in the piston passing through the pressure measuring point in the cylinder is measured at the pressure measuring point in the cylinder, and the measured value of the pressure is used in connection with the control of the operation time of the lubricator. desirable. As the piston ring passes through the pressure measurement point, a pressure change occurs with a pronounced characteristic, the pressure change being limited to the region immediately around the piston ring. This provides a very accurate measure of the piston's current position and therefore provides a precise starting point for the controller to determine the operation of the lubricator.

In a particularly advantageous embodiment according to the invention, the changing cylinder pressure and the lubricating oil pressure are measured at the lubrication point. This offers several advantages. The measurement provides information about the cylinder pressure at the lubrication point, thus eliminating the need to calibrate the controller in time with respect to the movement of the piston between the measurement point and the lubrication point. The time correction changes depending on the engine speed. Moreover, the same measurement point provides information regarding the exact time of delivery of lubricant at the lubrication point. This is because the measured pressure obviously rises by such delivery. Such measurement of the actual delivery time of the lubricating oil prevents the known problem of anticipating a change in the delay between the operation of the lubricator and the arrival of the lubricating oil at the lubrication point.

Another advantage is that there is a cooling effect between the pressure sensor and the gas in the cylinder, in which a sufficient amount of lubricant is provided to adequately equalize the operating state of the pressure sensor. Furthermore, by supplying lubricating oil, a cleaning effect is brought about in the area around the pressure sensor, which is surely removed when the combustion residual product is attached to the pressure sensor.

The operation of the lubricator is appropriately determined in the current operating state or mode of operation of the cylinder. The monitoring of the operating state is made on the basis of known systems, such as an anti-scuffing system, and / or on the basis of the selected operating temperature of the cylinder, but during the operating period, the number of cycles of the engine during the operating period In order to analyze the operating state of the piston ring based on the measured value of the pressure in the cycle of the engine when the lubricator is in the inoperative state, only a few times the lubricator is operated, the pressure measuring data is supplied to the controller. It is desirable to. When lubrication is performed at the correct timing with respect to the movement of the piston, the pressure sensor placed at the lubrication point cannot measure the pressure data that can be used to determine the operating state of the ring during the engine cycle with lubrication. This is because, by lubrication, the increase in pressure “drown” small pressure changes that indicate signs of operational problems. By not lubricating the cylinder during the entire cycle of the engine, the measured value of the pressure from the engine cycle without lubricating oil can be applied to the analysis of the operating state of the piston ring. The longer the interval between each operation of the lubricator, the advantage is that the volume of lubricating oil per operation is greater, and thus good lubrication is achieved since a large amount of lubricating oil is arranged more efficiently along the periphery of the cylinder.

By monitoring the operating state, reference data on the varying cylinder pressure, which indicates the normal operating state of the cylinder, can be stored in the control device during operation of the engine. When a new engine is operated, reference data for each cylinder can be recorded and accumulated, as a result of which the reference data indicates whether the currently measured operating data indicates a normal operating condition or the dosage of lubricant. If increased, it can be used later as a reference to compare whether it indicates an abnormal operating state that requires a change of operating parameters. Since the reference data is established based on the actual operating state for each cylinder, even small deviations from normal operation can be confirmed. Thus, by monitoring the operating state, it is possible to warn the abnormal operating state much earlier than the anti-scooping system of the prior art based on the detection of the abnormal rise of the temperature of the cylinder wall.

It is desirable to update the reference data on the normal operating state of the cylinder by the controller to correct the change over the long term of the cylinder pressure fluctuation caused by the wear of the normal cylinder. The above update, which can be carried out regularly, improves the possibility of the control device detecting a small deviation from the normal operating state.

By monitoring the operating state, a warning is automatically issued whether the pressure drop across each piston ring is normal, i.e. indicative of normal operation. Moreover, if desired, a very advantageous monitoring of whether the piston ring rotates about the longitudinal axis of the piston can be made. The reason for this is that the reference data for the temporary change in the cylinder pressure that occurs as the ring clearance of the piston ring regularly passes through the pressure measurement point can be included in the reference data of the controller for the normal operation of the cylinder. Because. Based on this, the operating state monitoring can record the rotational frequency of each respective piston ring, and in the case where the frequency of the piston ring decreases during continuous operation of the engine, the control device has an annular shape in which the piston ring is associated. A signal can be sent indicating that it is pressed into the groove.

If the measured value of the changing cylinder pressure suggests an abnormal operating condition for the cylinder including the piston, the piston ring or the cylinder liner, the controller preferably controls the lubricator to temporarily dispense more lubricant. Often, transient overdose of lubricant may be sufficient to reestablish normal operating conditions. In the case of indicating a deviation from the normal operating state, the control unit may inform the operator or the central control unit that the operating state has changed. Thus, the cylinder can be inspected and, in some cases, very quickly warned that it needs to be repaired, based on which it is possible to order spare replacement parts and to establish an inspection plan. With respect to the cylinder of the engine, therefore, inspection based on the actual operating state of the cylinder can be performed instead of the ordinary periodic inspection. The inspection may be one of the preventive inspections where the control unit instructs a possible future operational disturbance that may be prevented by early involvement, or one necessary to report the actual failure of the cylinder. have.

Typically, the dosage of lubricating oil is set to a predetermined minimum dosage of lubricating oil, which is determined based on experiments from a number of engines operating normally continuously at the maximum continuous rating (100 percent engine load). This standard dosage is sufficient to correct for changes in lubrication due to manufacturing tolerances of the lubrication system and the cylinder member.

The present invention provides an adequate possibility of significantly saving the consumption of lubricant, and the control unit is provided with a cylinder until the measured changing cylinder pressure indicates that the operating state of the cylinder begins to deviate from the normal operating state. By reducing the dose of lubricant, the required minimum dose of lubricant into the cylinder is automatically detected. Thus, the minimum dose for the cylinder in question is the dose used in a suitable period of time before deviating from normal operation.

By varying the dosage volume per actuation and operating the dosing device at a particular frequency relative to the engine cycle, a lubricator with a dose adjustment may be used. Alternatively, a lubricator may be used that doses the same volume per operation, and by varying the number of engine cycles that pass between each operation of the lubricator, thereby changing the dose of lubricant by the lubricator. This mode of operation of the lubricator provides the advantage that the volume of administration to each operation is sufficient to provide good distribution of the lubricating oil in the cylinder.

In another optional refinement of the invention, the control device has information about a number of standard groups of engine cycles, and operates the lubricator once for each group. In addition, by varying the composition of a series of standard groups of engine cycles, the amount of lubricating oil administered by the lubricator is varied. For example, there may be a standard group of engine cycles such as 3, 4, 5, and 6, where each of the groups operates the lubricator once, for example, throughout the operating period of 500 engine cycles, By selecting the appropriate combination of continuous standard groups, the dosage volume can be changed continuously. For example, if only the standard group operating once every four engine cycles is used in the operating mode, the dose is determined by selecting a standard group containing five engine cycles after every fourth standard group of four engine cycles. Can be reduced. From the control engineering point of view, this is very simple to manage the control device.

There is little demand on the mechanical equipment and, therefore, the design which is advantageous in terms of cost, especially in the case of retrofitting an existing engine which is not equipped with a device for detecting the rotational movement of the crankshaft, is installed in the engine. In the method according to the invention, the control device operates the lubrication device at any time during the engine's cycle during operation of the engine, the control device wherein the ring pack of the piston is connected to the lubrication point during the upstroke of the piston. It is characterized by adjusting the operation timing of the lubrication device based on the measured value of the cylinder pressure which changes in the cylinder during the engine cycle so that the lubricating oil flows out from the lubrication point when it is opposed. After a very short period of operation, the control device recognizes when the piston passes through the lubrication point, based on the measured value of the changing cylinder pressure, and then lubrication so that the lubricant is discharged when the piston passes through the lubrication point. The operation of the device can be adjusted in a simple way.

The invention also relates to a cylinder lubrication system for an internal combustion engine having at least one lubrication device for supplying lubricating oil to at least one lubrication point of the cylinder and a control device for electronic control of the lubrication device. The cylinder lubrication system has at least one pressure sensor for measuring the changing cylinder pressure in the cylinder, and the controller receives through the data input the pressure measurement data for the pressure change in the cylinder at the position of the pressure sensor. It is characterized by. By this system, data can be collected for the purpose of analyzing the operating condition of the cylinder and for adjusting the operation of the lubricator which can be used to obtain the above advantages. The pressure sensor can be placed on the side of the cylinder, and can measure the pressure in the sliding surface area through which the piston ring passes during each engine cycle, and the local pressure change around the piston ring acts on the individual ring of each ring. Provides information about the status.

In a suitable embodiment, the control device comprises an automatic self-learning program having an information processing function such as a neural network and / or a comprehensive algorithm or fuzzy logic for processing the pressure measurement data. do. Based on the measurement data from the cylinder in operation, and predetermined information on the representative error information, the program can detect a small deviation from normal operation and give an early warning of the initial error information.

The invention also relates to a connecting member for mounting to a lubrication point of a cylinder of an internal combustion engine, the connecting member being a housing for insertion into a bore of a cylinder wall, and a lubrication point from a connection for a lubrication pipe formed in the housing. It extends to the outlet opening of the, and includes a channel provided with a check valve opened toward the outlet opening. The connecting member is characterized in that the pressure sensor communicates with a channel section extending from the check valve to the delivery opening. When the connecting member is mounted on the cylinder, the pressure sensor is in permanent communication with the area disposed inside the cylinder at the lubrication point. The pressure sensor can be incorporated in the housing of the connecting member.

The invention will now be described in more detail with reference to the accompanying drawings in schematic.

The cylinder 1 of the internal combustion engine shown in FIG. 1 comprises a cylinder liner 2, a cylinder cover 3 with an exhaust valve 4 and a piston 5 mounted on top of the piston rod 6. On the outer surface of the piston, a plurality of annular grooves for mounting the piston ring 7 are provided. The number of piston rings may vary depending on the type of engine, but generally at least three, up to six piston rings are provided. In order to provide an accurate seal, the ring must be able to move in the associated annular groove, and the movement of the ring usually involves both up and down displacement in the annular groove and rotation about the longitudinal axis 8 of the piston. Included.

The cylindrical inner surface of the cylinder liner 2 constitutes the sliding surface 9 for the piston ring. The lower end of the slide surface is disposed at the lower edge of the lowest piston ring at the bottom dead center of the piston, and the upper end of the slide surface is disposed at the upper edge of the uppermost piston ring at the top dead center of the piston. The piston ring and the cylinder liner operate correctly only when lubricating oil is properly supplied continuously to the slide surface. In a crosshead engine, the middle lower part separates the sump sump from the cylinder, and as a result, for example, by means of a lubricator 10 of the type disclosed in the applicant's German patent publication DE-A19743955. It is necessary to lubricate the cylinder. In this patent, an electronically actuated hydraulically driven actuator drives a plurality of dosing pistons in one common delivery stroke, or, for example, a mechanically driven pump as disclosed in EP 0 678 152. Each dose of lubricant is released in combination with the electronics.

The lubrication apparatus 10 can supply lubricating oil to several lubrication points 11 of the same cylinder or several cylinders. In the case of lubricating several cylinders, the lubricator is operated visually on each of one cylinder and the other cylinder. Larger engines generally have at least one lubricator per cylinder, and the lubrication points connected to the lubricator are generally located at the same longitudinal position (level) of the cylinder liner, but with spacing along them. Placed and placed. If lubrication is desired at several levels and / or lubrication with more than one type of lubricant, more lubricators per cylinder will generally be used.

The internal combustion engine is a low speed two-stroke crosshead engine with a maximum rotational speed in the range of 60-275 rpm, an output per cylinder of 300-6000 kW, a cylinder bore of 25-100 cm and a stroke of 90-300 cm. Can be. The invention can also be advantageously used for four-stroke engines that pressure lubricate a cylinder.

The lubrication device 10 is connected to the lubrication point 11 via a conduit, ie a lubrication pipe 12. In the vicinity of the lubrication point, a check valve 13 is provided to allow only flow to the lubrication point and to prevent a relatively high cylinder pressure during the operation stroke from being applied to the lubricator. When the lubricating oil is sent to the lubrication point on the cylinder side of the check valve, the pressure of the lubricating oil becomes more than the current pressure of the cylinder at the lubrication point. The lubrication point is arranged so that the pressure of the cylinder is in the range of 5 to 30 bar, for example, a pressure sensor that measures over a relatively small pressure section and has a true zero, ie signal amplification. It allows the use of pressure sensors that do not.

A pressure sensor 14 (pressure pickup) is connected between the check valves associated with at least one lubrication point, and the sensor is connected to the discharge side of the check valve, so that the pressure of the cylinder is measured near the lubrication point. The signal lead 15 from the pressure sensor 14 transmits the pressure measurement data to the data input unit 16 of the controller 17. The controller 17 makes a determination on the basis of the measured data and any stored data at the time of operation of the lubricator, and thus signals to the lubricator 10 to which lubricant is supplied via the conduit 19. A control signal is provided through the lead 18. 1 shows that the controller 17 controls two lubricators, which can lubricate the same cylinder. The timing of operation of the lubricator with respect to piston movement only requires the use of a single pressure sensor 14, but preferably at least one pressure sensor is used for each lubricator 10. This is because the precise function of each of the lubricators can be controlled thereby.

In order to simplify the specification, in the description of another embodiment described below, the same reference numerals used above for the same type of parts are used.

Figure 2 shows a cylinder of an embodiment engine in which two lubricators are provided per cylinder, with lubrication points 11 alternately connected to one and the other lubricator along the circumference of the cylinder. Even if one lubricator fails, the other lubricator can be operated to deliver at least twice the volume of its normal lubricating oil, thus keeping the cylinder in normal operation until the fault condition is alleviated. do.

Each lubrication device 10 is connected with a pressure sensor 14 arranged at a lubrication point that is suitable for being spaced apart from each other in the circumferential direction and disposed opposite each other. When measuring data from the pressure sensor is used for the piston ring condition analysis (see below), since two pressure sensors are installed, an abnormal pressure sequence measured by one pressure sensor is defined as a ring gap. Is generated by passing through the pressure gauge (this is confirmed by measuring the normal pressure sequence on the other pressure sensor), or a failure condition of the piston ring that causes an abnormal pressure sequence on both sensors can be easily determined. have. Moreover, since two sensors are provided, operational reliability is improved. This is because accurate operation of the lubrication device can be maintained even when one pressure sensor fails. By allowing the lubrication device to be controlled by another control device such as the control device 10 associated with another cylinder of the engine as a back-up, the operational reliability of the lubrication system can be further increased. One controller 10 may be provided for each cylinder, or the controller 10 may be common to one group of cylinders or to the entire engine.

3 to 6 show the pressure sequence measured as a function of time during the compression stroke of the piston of a turbocharged two-stroke diesel engine. A pressure sensor is located at the lubrication point, whose zero point is adjusted according to the boost air pressure. The piston has four piston rings. Figure 3 shows the pressure sequence measured during the cycle of the engine when no lubricant is supplied to the measurement point. This graph has a distinct peak at position (b) representing the time t1 at which the uppermost piston ring has passed through the measurement point. Immediately thereafter, the graph shows peaks c, d and e, which characteristically indicate the passage of three different piston rings in the state of a small pressure rise, in which a significant pressure drop occurs later. After the piston passes upwards, it is suggested that the cylinder pressure at the metering point is hardly affected by the significantly high pressure of the combustion chamber above the piston. Although the measuring point is not located on the sliding surface of the cylinder, for example, when measuring the pressure load acting on the cylinder cover, comprehensive data on the piston position are obtained, but the pressure change on each piston ring No local data is obtained.

4 to 6 show examples of measured pressure sequences f, g and h, respectively, if lubrication is done too early, correctly done, and too late. In all these three cases, the pressure is greatly increased at time t2 by sending lubricant oil to the lubrication point, and the pressure is greatly reduced at time t1 by passage of the first piston ring. It is preferable to discharge the lubricating oil during the period between the time t1 and the time e at which the lowermost piston ring passes. Such accurate timing is shown in FIG.

In order to adaptively control the timing of the lubricating oil with respect to the passage of the piston, a measured pressure change can be used, and the controller corrects the operation of the lubricator until the time t1 and time t2 substantially coincide. .

It is preferable to deliver the lubricant when at least three uppermost piston rings have passed through the lubrication point, the cross-sectional area of the outlet opening of the lubrication point being adapted to the amount of lubricating oil sent out per operation of the lubricator, thereby lubricating oil at the maximum continuous rating. It is desirable to be able to send. When the engine is running at low load, the piston moves more slowly past the lubrication point, and in most cases, the flow period of the lubricating oil does not change, so the control unit is at the lubrication point until the first piston ring passes. The lubrication device is operated with a periodic delay, for example every two or three operations, so as not to start the delivery of the oil. This ensures lubrication at both the top and bottom of the ring pack of the piston.

When lubricating oil is not delivered when the piston passes the measurement point of the slide surface, detailed data on the state of the piston ring can be obtained as shown in FIG. This is because the pressure drop in the passage of each piston ring can prove that the ring is functioning correctly. As the ring rotates in an annular groove, an inclined ring gap is provided in the ring, and gas passes through the gap, so that periodic excess measurement data is generated for each cylinder, thereby measuring pressure. According to the measured pressure, the pressure drop before and after the ring is substantially smaller than normal. Because the piston ring rotates slowly, passage occurs in a recognizable path during many engine cycles.

Figure 7 shows the pressure sequence measured during the expansion stroke of the piston. The vertical line indicated by i suggests that the piston ring passes downward through the position of the pressure sensor exposed to the pressure in the combustion chamber. After some preliminary pressure fluctuation, the pressure drops through the same path to the charge air pressure. In the control device, the above information about the pressure sequence in the current operating mode can be used to adjust the timing of opening the exhaust valve.

In the electronic controller 17, the collected pressure measurement data can be stored and analyzed, an example of which is shown in FIG. 8 in schematic form. In FIG. 8, the information 20 transmitted through the signal lead 15 is stored in step 21. In FIG. This is done after removing the undesirable information as much as possible. In step 22, the data is appropriately selected to determine the time t1, in step 23 the time t2 is determined correspondingly, and in step 24, the control apparatus By comparing the time t1 with the time t2, it is determined whether or not correction of the timing of the actual signal to the lubricator is necessary, and then the control signal 25 is provided to the lubricator in a desired manner. . In step 24, an analysis can be made based on predetermined criteria, and one or more operating parameters of the engine, e.g., a given order for changing the current load or load, or excess lubrication. Information about the manual procedure to perform is assisted. In Fig. 2, the signal lead 26 shows that the controller can accept an external signal of the type described above.

Another example of the processing of pressure measurement data by the control device is shown schematically in FIG. 9, in which the information is changed in the normal operating state of the cylinder after removing the noise and undesirable information in step 27. It may be analyzed in step 28 whether it is appropriate as reference data for the cylinder pressure. If appropriate, such information may be passed back to step 21 and stored for later use in noise and undesirable governmental removal and analysis in subsequent steps. The reference data can be updated, and in the analysis at the time of the update, a comparison with a predetermined expected change is made so that the initial error state is not included in the reference data.

The analysis in step 28 may be performed by an automated self-learning program with an information processing function, such as a neural network and / or a comprehensive algorithm. Programs of this kind are known in the art for monitoring and analyzing operating conditions. Upon delivery of the engine, the program is adapted and adjusted according to the operating mode and the error mode for the cylinder of the engine, and after operation of the cylinder, the program analyzes the information obtained from the pressure measurement data from the engine in operation. Finally, the program can be adjusted and the reference data for the cylinder concerned can be determined. In this way, when the control device is normally operated, in step 29, it is possible to determine the government for controlling the engine, and provide a signal for operating the lubrication device.

The connecting member 30 shown in FIG. 10 has a connecting portion 31 for the lubrication pipe 12. The lubrication pipe communicates with the discharge opening 34 via the channel 32 of the housing 33 of the connecting member. The channel 32 is provided with a check valve 35 which opens toward the discharge opening. A pressure sensor 36 is disposed in relation to the channel 32 between the check valve and the discharge opening. The pressure sensor is a standard component, for example it can be a strain gauge. Of course, the pressure sensor can be installed as an independent device, but by incorporating it into the connecting member, the pressure sensor is protected from harmful action and the installation is easy. This is usually because it is necessary to pass the connecting member through a lubrication channel installed through the cylinder wall on the wall of the cylinder liner or on the wall of both the cylinder liner and the cooling jacket.

The internal combustion engine may also be a four-stroke engine and may have a trunk piston.

According to the invention, it is possible to improve the supply of lubricating oil to at least one lubrication point of the cylinder.

Claims (19)

A cylinder lubrication method of an internal combustion engine, wherein the at least one lubrication device for supplying lubricating oil to at least one lubrication point of the cylinder of the internal combustion engine is controlled electronically by an associated controller. During operation of the engine, the pressure change generated by the passage of the piston ring installed in the piston through the pressure measurement point in the cylinder is measured at the pressure measurement point in the cylinder, and the electronic controller uses one of the pressure measurement values. Or cylinder lubrication method of the internal combustion engine, characterized in that for controlling the operation time of the lubricator during more engine cycles. delete 2. The cylinder lubrication method according to claim 1, wherein the pressure change and the lubricating oil pressure of the cylinder are measured at the lubrication point. 2. The piston according to claim 1, wherein the lubrication device is operated only a smaller number of cycles of the engine during the operation period, and the piston is based on the measured value of the pressure in the engine cycle when the lubrication device is in the inoperative state. A method for lubricating a cylinder of an internal combustion engine, characterized by supplying pressure measurement data to the control device for analyzing the operating state of the ring. 5. A cylinder lubrication method for an internal combustion engine according to claim 4, wherein reference data on a change in pressure of the cylinder which presents the normal operating state of the cylinder is stored in the control device during operation of the engine. 6. The method according to claim 5, wherein the reference data on the normal operating state of the cylinder is updated by the controller so as to correct a long-term change in cylinder pressure change caused by normal wear of the cylinder. Lubrication method of an internal combustion engine. 5. The method of claim 4, wherein the reference data for the temporary change in the pressure change of the cylinder, which is generated by the ring clearance of the piston ring periodically passing through the pressure measurement point, is provided. A cylinder lubrication method for an internal combustion engine, which can be included in reference data. 6. The internal combustion apparatus according to claim 5, wherein when the measured value of the pressure change of the cylinder suggests an abnormal operating state with respect to the cylinder, the control device controls the lubrication device to temporarily administer more lubricating oil. How to lubricate a cylinder in an engine. 5. The control apparatus according to claim 4, wherein the control unit reduces the dose of lubricating oil to the cylinder until the measured change in pressure of the cylinder indicates that the operating state of the cylinder begins to deviate from the normal operating state, A method for lubricating a cylinder of an internal combustion engine, characterized in that it automatically detects an essential minimum dose of lubricating oil to the cylinder. The internal combustion engine according to any one of claims 4 to 9, wherein the dosage of the lubricating oil by the lubricator is changed by changing the number of engine cycles passed between each operation of the lubricator. How to lubricate cylinder 11. The apparatus of claim 10, wherein the control device has information about a plurality of standard groups of engine cycles, by lubricating the device once for each of the groups, thereby changing the composition of the series of standard groups of engine cycles. And lubricating oil administered by the lubrication device. The ring pack of the piston according to claim 1, wherein the control device operates the lubrication device at any time during a cycle of the engine when the engine is operated, and the control device is a ring pack of the piston during an upstroke of the piston. The operation timing of the lubricator is adjusted based on the measured value of the pressure change in the cylinder during the cycle of the engine so that the lubricating oil flows out from the lubrication point when facing the lubrication point. Lubrication method. The electronic control device according to claim 1, wherein the electronic control unit is used to control at least one other operation parameter such as an opening timing of an exhaust valve, based on a measured value of the pressure change of the cylinder during operation of the engine. A method of lubricating a cylinder of an internal combustion engine, characterized by providing a signal. A cylinder lubrication system for an internal combustion engine, having at least one lubrication device for supplying lubricating oil to at least one lubrication point of the cylinder and a control device for electronically controlling the lubrication device. The cylinder lubrication system has at least one pressure sensor for measuring the pressure change in the cylinder, and the control unit transmits the pressure measurement data on the pressure change in the cylinder at the position of the pressure sensor through a data input unit. A cylinder lubrication system for an internal combustion engine, characterized by containing. 15. The cylinder lubrication system for an internal combustion engine according to claim 14, wherein said pressure sensor is disposed on the side of said cylinder and measures the pressure in the sliding surface region through which a piston ring passes during each engine cycle. 16. The lubricating oil delivery part of the lubricating device according to claim 15, wherein the lubricating oil sending part of the lubricating device is connected to the lubricating point through a lubricating oil conduit provided with a check valve that blocks the lubricating oil conduit from the cylinder pressure when the cylinder pressure exceeds the pressure of the lubricating oil And the pressure sensor is arranged in relation to the lubricating oil conduit on the cylinder side of the check valve. 17. The control apparatus according to any one of claims 14 to 16, wherein the control device includes a self-learning program having an information processing function such as a neural communication network and / or a comprehensive algorithm or fuzzy logic for processing pressure measurement data. A cylinder lubrication system for an internal combustion engine. delete delete