WO2017017717A1 - Device for specifying ease of occurrence of low-temperature corrosion in engine cylinder, program and recording medium - Google Patents

Device for specifying ease of occurrence of low-temperature corrosion in engine cylinder, program and recording medium Download PDF

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Publication number
WO2017017717A1
WO2017017717A1 PCT/JP2015/071065 JP2015071065W WO2017017717A1 WO 2017017717 A1 WO2017017717 A1 WO 2017017717A1 JP 2015071065 W JP2015071065 W JP 2015071065W WO 2017017717 A1 WO2017017717 A1 WO 2017017717A1
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WO
WIPO (PCT)
Prior art keywords
sulfuric acid
cylinder
engine
index value
temperature corrosion
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PCT/JP2015/071065
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French (fr)
Japanese (ja)
Inventor
将行 別府
Original Assignee
日本郵船株式会社
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Filing date
Publication date
Application filed by 日本郵船株式会社 filed Critical 日本郵船株式会社
Priority to JP2015553338A priority Critical patent/JP5978407B1/en
Priority to CH00078/18A priority patent/CH712931B1/en
Priority to PCT/JP2015/071065 priority patent/WO2017017717A1/en
Publication of WO2017017717A1 publication Critical patent/WO2017017717A1/en
Priority to DKPA201800086A priority patent/DK180414B1/en
Priority to DKPA202000406A priority patent/DK180772B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating or supervising devices
    • F02B77/083—Safety, indicating or supervising devices relating to maintenance, e.g. diagnostic device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00—Monitoring properties or operating parameters of vessels in operation
    • 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
    • F01M11/10—Indicating devices; Other safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating or supervising devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • 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
    • F01M1/18—Indicating or safety devices
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions

Definitions

  • the present invention relates to a technique for specifying the susceptibility of low temperature corrosion in a cylinder of an engine.
  • Patent Document 1 discloses a document that discloses a mechanism for presenting appropriate maintenance timings for engine parts mounted on a ship.
  • a business server managed by a diesel main engine manufacturer receives parts maintenance data of a diesel main engine mounted on a ship from the ship, and receives the received parts maintenance data, parts usage limit values, etc.
  • a system is disclosed in which parts maintenance analysis is performed based on the above and the result of parts maintenance analysis is transmitted to a ship and a personal computer of an operation management company.
  • a crew member of a ship, a staff of an operation management company, or the like can estimate a timing at which a part reaches a use limit value by observing a trend of damage of the part. .
  • Ship crews and the like can estimate the timing at which the cylinder liner wear amount reaches the limit value by recording the wear amount obtained by measuring the cylinder liner during maintenance and checking the trend of wear. However, if low temperature corrosion occurs in the cylinder liner, wear proceeds rapidly, and there is a risk that the wear amount reaches the limit value earlier than the estimated timing. Accordingly, ship crews and the like have a need to know how much the cylinder is susceptible to low temperature corrosion.
  • an object of the present invention is to provide a means for specifying the susceptibility of low temperature corrosion in a cylinder of an engine.
  • the present invention provides a load index value acquisition means for acquiring a load index value indicating the magnitude of engine load, and at least the sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration.
  • Attribute value acquisition means for acquiring an attribute value which is one value
  • sulfuric acid condensation intensity acquisition means for acquiring sulfuric acid condensation intensity indicating the likelihood of sulfuric acid condensation in the cylinder according to the load index value
  • a device comprising a low temperature corrosion rate specifying means for specifying a low temperature corrosion index value indicating an index of the progress rate of low temperature corrosion in the cylinder based on the attribute value and the sulfuric acid condensation strength is proposed as a first aspect.
  • a configuration may be adopted as a second aspect in which a wear amount specifying means for specifying the wear amount of the cylinder liner in the cylinder is provided based on the low temperature corrosion index value.
  • the apparatus includes a proper state specifying unit that specifies a combination of the load index value and the attribute value satisfying a predetermined condition as an appropriate state based on the low temperature corrosion index value. May be employed as the third aspect.
  • a configuration including an appropriate state specifying means for specifying a combination of the load index value and the attribute value satisfying a predetermined condition as an appropriate state based on the wear amount may be adopted as the fourth aspect.
  • a fifth aspect is such that the attribute value acquisition unit acquires the amount of sulfur contained in fuel oil used in the engine as the attribute value. May be employed.
  • the attribute value acquisition unit acquires the amount of a basic substance contained in a cylinder lubricant used in the engine as the attribute value. You may employ
  • the present invention also provides a load index value indicating the magnitude of engine load, an attribute value that is at least one of the sulfuric acid concentration in the cylinder of the engine or an attribute that affects the sulfuric acid concentration, and the load index value.
  • Sample data acquisition means for acquiring a plurality of sample data indicating an index value of the progress rate of low-temperature corrosion in a cylinder having a sulfuric acid concentration corresponding to the attribute value of the engine operated at a load corresponding to the load, and the sample data acquisition
  • Sulfuric acid dew condensation intensity specifying means for specifying sulfuric acid dew condensation intensity that is an index value corresponding to a load index value and indicates the easiness of condensation of sulfuric acid in the cylinder based on a plurality of sample data obtained by the means;
  • the apparatus provided is proposed as a seventh aspect.
  • the present invention relates to each of a plurality of engines having different characteristics, and is liable to cause condensation of sulfuric acid in a cylinder in accordance with a characteristic value indicating the characteristics of the engine and a load index value indicating the magnitude of the load of the engine.
  • a sample data acquisition means for acquiring sample data including sulfuric acid dew condensation intensity, and a relationship for specifying a relationship between the characteristic value and the sulfuric acid condensation intensity based on a plurality of sample data acquired by the sample data acquisition means
  • An apparatus provided with specifying means is proposed as an eighth aspect.
  • the present invention provides an attribute which is at least one value of processing for obtaining a load index value indicating the magnitude of engine load in a computer and sulfuric acid concentration in the engine cylinder or an attribute affecting the sulfuric acid concentration.
  • a load index value indicating the magnitude of engine load in a computer and sulfuric acid concentration in the engine cylinder or an attribute affecting the sulfuric acid concentration.
  • the present invention provides a computer with a load index value indicating the magnitude of engine load, a sulfuric acid concentration in the cylinder of the engine or an attribute value that is at least one value of an attribute affecting the sulfuric acid concentration,
  • a program for executing a process for specifying the sulfuric acid condensation intensity indicating the ease of the condensation of sulfuric acid in the cylinder according to the load index value is proposed as a tenth aspect.
  • the present invention relates to a computer in which each of a plurality of engines having different characteristics has a characteristic value indicating the characteristics of the engine and a dew condensation of sulfuric acid in the cylinder according to a load index value indicating the magnitude of the load of the engine.
  • a program for executing processing for obtaining sample data including sulfuric acid dew condensation intensity indicating the likelihood of occurrence, and processing for specifying a relationship between the characteristic value and the sulfuric acid dew condensation intensity based on the plurality of sample data Proposed as an eleventh aspect.
  • the present invention proposes as a twelfth aspect a computer-readable recording medium for continuously recording a program according to any one of the ninth to eleventh aspects.
  • the progress rate of the low temperature corrosion in the cylinder of the engine can be monitored.
  • the wear amount of the cylinder liner can be monitored.
  • the appropriate state of the engine load and the sulfuric acid concentration in the cylinder or the attribute value that affects the sulfuric acid concentration in consideration of the progress rate of the low temperature corrosion in the cylinder is specified.
  • the appropriate state of the engine load and the sulfuric acid concentration in the cylinder or the attribute value that affects the sulfuric acid concentration in consideration of the wear amount of the cylinder liner is specified.
  • the progress rate of the low-temperature corrosion in the cylinder considering the amount of sulfur contained in the fuel oil is specified.
  • the progress rate of the low-temperature corrosion in the cylinder in consideration of the amount of the basic substance contained in the cylinder lubricating oil is specified.
  • the sulfuric acid dew condensation intensity indicating the easiness of sulfuric acid dew condensation in the cylinder according to the engine load is specified.
  • the relationship between engine characteristics and sulfuric acid dew condensation strength is specified.
  • the apparatus according to the first, seventh and eighth aspects of the present invention is realized by a computer.
  • the apparatus according to the first, seventh, and eighth aspects of the present invention is realized by a computer that can read and execute a program from a recording medium.
  • identification system concerning one Embodiment The figure which showed the basic composition of the computer employ
  • strength used with the terminal device concerning one Embodiment The figure which illustrated the data composition of the wear amount management table memorized by the terminal unit concerning one embodiment.
  • FIG. 1 is a diagram showing the overall configuration of the wear amount specifying system 1.
  • the wear amount specifying system 1 is a system for continuously specifying the wear amount of the cylinder liner of the engine mounted on the ship 8.
  • the wear amount specifying system 1 specifies the low temperature corrosion rate of the cylinder liner, and specifies the wear amount reflecting the specified low temperature corrosion rate.
  • the amount of wear of the cylinder liner means the amount of the portion of the cylinder liner lost due to wear.
  • the amount of wear of the cylinder liner is represented by the amount of decrease in thickness based on the thickness of the unused cylinder liner, and the unit is millimeters.
  • the expression format of the wear amount is not limited to this, and the wear amount may be represented by, for example, a decrease in mass (unit: grams) from the unused state of the cylinder liner.
  • the wear amount of the cylinder liner varies depending on the position in the axial direction and the position around the axis, but in the following description, the average value thereof is used.
  • the low-temperature corrosion rate of the cylinder liner means the low-speed corrosion progression rate (the rate at which the deterioration is caused by low-temperature corrosion) in the cylinder liner.
  • the low temperature corrosion rate of the cylinder liner is represented by the depth of the portion that is altered by low temperature corrosion in unit time, and the unit is assumed to be millimeter / 1000 hours (mm / 1000 h).
  • the expression format of the low-temperature corrosion rate is not limited to this, and the low-temperature corrosion rate may be expressed by, for example, the mass (unit: grams / day) of the portion that is altered by low-temperature corrosion in unit time.
  • an index value indicating the magnitude of the low temperature corrosion rate instead of the low temperature corrosion rate itself may be used instead of the low temperature corrosion rate.
  • the low temperature corrosion rate of the cylinder liner (or index value indicating the magnitude of the low temperature corrosion rate) varies depending on the position in the axial direction and the position around the axis, but in the following description, the average value thereof is used.
  • the wear amount specifying system 1 includes a terminal device 11 mounted on a ship 8, a server device 12 that performs data communication with the terminal device 11 via a communication satellite 9, and staff of a management company of the ship 8 on land, for example. And the like include a terminal device 13 used for browsing data stored in the server device 12.
  • the number of ships 8 is usually plural.
  • the terminal device 11 mounted on each of the plural ships 8 performs data communication with the server apparatus 12.
  • the number of terminal devices 13 varies depending on the number of viewers of data stored in the server device 12.
  • the terminal device 13 shown by FIG. 1 is arrange
  • the hardware configuration of the terminal device 11 and the terminal device 13 is, for example, a computer for a general terminal device.
  • FIG. 2 is a diagram illustrating a basic configuration of the computer 10 employed as hardware of the terminal device 11 and the terminal device 13.
  • the computer 10 includes a memory 101 that stores various data, a processor 102 that performs various data processing according to a program stored in the memory 101, a communication IF 103 that is an IF (Interface) that performs data communication with other devices, a user A display device 104 such as a liquid crystal display for displaying an image, and an operation device 105 such as a keyboard for receiving a user operation.
  • an external display device connected to the computer 10 may be used instead of or in addition to the display device 104 built in the computer 10.
  • an external operation device connected to the computer 10 may be used instead of or in addition to the operation device 105 built in the computer 10.
  • the hardware configuration of the server device 12 is, for example, a general server device computer.
  • FIG. 3 is a diagram showing a basic configuration of the computer 20 employed as hardware of the server device 12.
  • the computer 20 includes a memory 201 that stores various data, a processor 202 that performs various data processing according to a program stored in the memory 201, and a communication IF 203 that performs data communication with other devices.
  • FIG. 4 is a diagram illustrating a functional configuration of the terminal device 11. That is, the computer 10 operates as a device having the configuration shown in FIG. 4 by executing data processing according to the program for the terminal device 11. Below, the function structure part of the terminal device 11 shown by FIG. 4 is demonstrated.
  • the sulfuric acid dew condensation strength acquisition means 111 acquires the sulfuric acid dew condensation strength according to the engine of the ship 8 on which the terminal device 11 is mounted.
  • the sulfuric acid dew condensation intensity is an index value that indicates the degree of the possibility of sulfuric acid dew condensation in the cylinder when the engine is operating at a certain load, and is specified in advance for each engine according to various loads.
  • FIG. 5 is a diagram showing the data structure of a table storing the sulfuric acid condensation intensity acquired by the sulfuric acid condensation intensity acquisition means 111.
  • the table shown in FIG. 5 is referred to as a “sulfuric acid condensation strength table”.
  • the sulfate condensation intensity table is transmitted from the server device 12 to the terminal device 11 and acquired by the sulfate condensation intensity acquisition unit 111.
  • a sulfate condensation intensity table may be input to the terminal device 11 by a crew member of the ship 8 and acquired by the sulfate condensation intensity acquisition unit 111, for example.
  • the data of the sulfuric acid dew condensation intensity table is different for each engine identified by the engine ID (Identifier).
  • load index value a load index value indicating the magnitude of the engine load is stored.
  • sulfuric condensation intensity sulfuric acid condensation intensity corresponding to each of load index values (10%, 20%,..., 100% in the example of FIG. 5) is stored.
  • the sulfuric acid dew strength when load index value is L (%) and W L.
  • FIG. 6 is a graph showing sulfuric acid dew condensation intensity W 10 when a certain engine (hereinafter referred to as “engine E”) is operated at a load corresponding to a load index value of 10%
  • FIG. FIG. 8 is a graph showing sulfuric acid dew condensation intensity W 30 when operating at a load corresponding to a value of 30%
  • FIG. 8 shows sulfuric acid dew condensation intensity W 90 when engine E is operated at a load corresponding to a load index value of 90%.
  • the X axis indicates the piston position in the cylinder
  • the Y axis indicates the temperature.
  • graph D shows the dew point temperature of sulfuric acid in the cylinder that changes according to the piston position in the cylinder.
  • Graph T shows the temperature of the inner surface of the cylinder liner that changes according to the position of the piston in the cylinder.
  • Low temperature corrosion of the cylinder liner is mainly caused by the condensation of sulfuric acid on the inner surface of the cylinder liner. Therefore, if the temperature of the inner surface of the cylinder liner is higher than the dew point temperature of sulfuric acid in the cylinder, sulfuric acid does not condense on the cylinder liner, and the low temperature corrosion of the cylinder liner hardly progresses. On the other hand, if the temperature of the inner surface of the cylinder liner is lower than the dew point temperature of sulfuric acid in the cylinder, sulfuric acid is condensed on the cylinder liner, and low temperature corrosion of the cylinder liner proceeds. In this case, the greater the amount of sulfuric acid that condenses, the faster the low temperature corrosion of the cylinder liner.
  • the sulfuric acid dew condensation strength is an index value indicating the ease of sulfuric acid dew condensation in the cylinder, and is conceptualized as the area of the region between the graph T and the graph D. If other conditions such as the operating state of the turbocharger are the same, as shown in FIGS. 6 to 8, the sulfuric acid dew condensation strength generally takes a larger value as the engine load is smaller. When the load exceeds a certain value, it often becomes “0”. It should be noted that the strength of sulfuric acid dew condensation is determined by the shape and position of graphs T and D, and is affected by the amount of basic substances such as sulfur contained in fuel oil and calcium contained in cylinder lubricating oil. There is nothing.
  • the shape and position of graph T and graph D are determined by the engine characteristics.
  • Engine characteristics that affect the shape and position of graph T and graph D include the shape of the derating map, the set temperature of the cylinder liner cooling water, the fuel consumption rate, Pmax (maximum combustion pressure in the cylinder), Pmax / Pme ( The ratio between the maximum in-cylinder combustion pressure and the net average effective pressure), the wall temperature distribution of the cylinder liner, and the like, but are not limited thereto.
  • the sulfuric acid dew condensation strength is represented by graph D (curve indicating the dew point temperature of sulfuric acid in the cylinder that changes according to the piston position in the cylinder) and graph T (inside of the cylinder liner that changes according to the piston position in the cylinder). It is only necessary to have a positive correlation with the area of the region between the curve and the surface temperature), and the area does not necessarily coincide with the area.
  • a basic substance is a substance which plays the role of the neutralizer contained in cylinder lubricating oil etc., for example, when a calcium-type cylinder lubricating oil containing calcium is used, a basic substance is calcium.
  • the low temperature corrosion rate for example, an estimated value based on a measured value of the iron content contained in the cylinder drain oil is used.
  • the load index value of the engine indicated by each sample data is L, the input amount of sulfur per unit time (hereinafter simply referred to as “sulfur amount”) is S, and the input amount of basic substance per unit time (hereinafter simply referred to as “base”).
  • sex material amount "C, low-temperature corrosion rate and CI, when the sulfuric acid concentration in the cylinder defined by the amount of sulfur S and basic substance amount C and H, sulphate condensation intensity W L for example the following formula 1 It is defined as a numerical value that satisfies the conditions shown in. However, a is a constant determined according to the neutralizing ability of the basic substance.
  • Formula 1 is an example of a method for calculating sulfate condensation strength, and a formula that can derive a more applicable sulfate condensation strength may be used instead of Formula 1.
  • a value estimated by, for example, a staff of a management company of the ship 8 based on engine characteristics may be used as the sulfuric acid dew condensation strength, regardless of the calculation formula. The above is an explanation of sulfuric acid dew condensation strength.
  • the load index value acquisition unit 112 acquires a load index value from, for example, an engine control device.
  • the load index value for example, a value measured by a shaft horsepower meter is used.
  • a load index value estimated from fuel consumption, ship speed, propeller rotation speed, propeller torque, scavenging pressure, turbocharger rotation speed, and the like may be used.
  • the load index value acquired by the load index value acquiring unit 112 is usually a load index value that has just been measured, and substantially indicates the magnitude of the engine load at the time of acquisition.
  • the attribute value acquisition unit 113 acquires an attribute value that is at least one value of the sulfuric acid concentration in the cylinder or an attribute that affects the sulfuric acid concentration.
  • the attribute value acquired by the attribute value acquisition unit 113 is usually an attribute value that has just been measured, and is substantially the sulfuric acid concentration in the cylinder at the time of acquisition or an attribute value that affects the sulfuric acid concentration.
  • the types of attribute values acquired by the attribute value acquisition unit 113 include the amount of sulfur input to the cylinder, the amount of basic substance input to the cylinder, the outside air temperature, and the like. Further, the attribute value acquisition unit 113 may acquire the sulfuric acid concentration specified based on the acquired sulfur amount or the like as the attribute value.
  • the attribute value acquisition unit 113 acquires the amount of calcium charged into the cylinder as the amount of the basic substance as one of the attribute values.
  • the attribute value acquisition means 113 replaces calcium with an amount of magnesium, barium, or the like as an attribute value. You may acquire as one of these.
  • a cylinder lubricant to which a calcium-based additive is added is used for the engine of the ship 8, and the attribute value acquisition unit 113 acquires the amount of calcium charged into the cylinder as one of the attribute values. To do.
  • the attribute value acquisition unit 113 reads out the sulfur content rate of the fuel oil from the storage device, receives the flow rate per unit time of the fuel oil from the flow meter, multiplies the flow rate of the fuel oil by the sulfur content rate, and unitizes the cylinder per unit time. Identify the amount of sulfur introduced per unit.
  • the attribute value acquisition unit 113 reads, for example, the calcium content of the cylinder lubricant from the storage device, receives the flow rate per unit time of the cylinder lubricant from the flow meter, and includes the calcium content in the flow rate of the cylinder lubricant. To identify the amount of calcium charged into the cylinder per unit time.
  • Storage unit 114 stores various data.
  • the data stored in the storage unit 114 includes, for example, a sulfuric acid condensation strength table acquired by the sulfuric acid condensation strength acquisition unit 111 (FIG. 5), a load index value acquired by the load index value acquisition unit 112, and an attribute value acquisition unit 113.
  • FIG. 9 shows a table used by the storage unit 114 to store various data received from the load index value acquisition unit 112, the attribute value acquisition unit 113, the low temperature corrosion rate identification unit 115, and the wear amount identification unit 116 (hereinafter referred to as “wear”). It is the figure which illustrated the data structure of "quantity management table”.
  • the wear amount management table is a collection of records for each period of a predetermined time length, for example, and the records are arranged in the order of the corresponding periods.
  • [period] [load index value], [attribute value 1], “attribute value 2”,..., [Attribute value n] (where n is attribute value acquisition means 113).
  • the time length of the period corresponding to each record is the load index. Any time length may be used as long as the value or attribute value does not change significantly, and the time length of the period corresponding to each record may be different for each record.
  • the storage unit 114 When the storage unit 114 receives data from the load index value acquisition unit 112 or the attribute value acquisition unit 113 within a period corresponding to each record, the storage unit 114 stores the data in a corresponding field, that is, [load index value] or [attribute value]. 1], “attribute value 2”,..., [Attribute value n]. At this time, when data is already stored in the storage destination field, the storage means 114 stores old data with new data, for example. Overwrite.
  • the storage unit 114 sets the data of the preceding record to the same field (data After that, a record corresponding to a new period is added to the wear amount management table.
  • the wear amount management table includes attribute values that affect the sulfuric acid concentration in the cylinder in each period (the amount of sulfur introduced into the cylinder, the amount of calcium introduced into the cylinder, etc.) and the magnitude of the engine load.
  • the load index value shown is stored in association with each other.
  • the low temperature corrosion rate specifying means 115 includes sulfuric acid condensation intensity according to the load index value acquired by the load index value acquisition means 112 among the sulfuric acid condensation intensity stored in the sulfuric acid condensation intensity table (FIG. 5), and attribute value acquisition means. Based on the attribute value acquired in step 113, the low temperature corrosion rate of the cylinder liner is specified.
  • the low temperature corrosion rate specifying means 115 first responds to the load index value L indicated by the data stored in the [load index value] of the target record for each of the records of the wear amount management table (FIG. 9). reading the sulfuric acid dew intensity W L sulfuric acid condensation intensity table (FIG. 5).
  • the low-temperature corrosion rate specifying unit 115 the read and sulfuric acid dew strength W L, of the target record Attribute Value 1], "attribute value 2, ..., attributes stored in the attribute value n] value a 1, a 2, ⁇ ⁇ ⁇ , based on the a n, in accordance with calculation formula is determined in advance, to calculate the low-temperature corrosion rate CI of the cylinder liner in the period corresponding to the target record.
  • Equation 1 described above is a calculation equation used by the low temperature corrosion rate specifying means 115 to calculate the low temperature corrosion rate CI when two types of attribute values of the sulfur amount S and the basic substance amount C are used as variables. It is an example.
  • the calculation formula used by the low temperature corrosion rate specifying means 115 to calculate the low temperature corrosion rate CI is generalized as the following formula 2.
  • the calculation formula shown in Expression 2 is generated in advance in the server device 12, for example, and is received by the receiving unit 118 from the server device 12 and stored in the storage unit 114.
  • the low temperature corrosion rate specifying means 115 reads out and uses the calculation formula shown in Expression 2 from the storage means 114.
  • the low temperature corrosion rate specifying means 115 stores the calculated low temperature corrosion rate CI in [Low temperature corrosion rate] of the target record of the wear amount management table (FIG. 9).
  • Equation 2 The calculation formula shown in Equation 2 is commonly used even when the engine load is different, but different sulfuric acid condensation strength is used for each load. Therefore, even if the attribute value is the same, the low temperature corrosion rate CI calculated according to Equation 2 becomes a different value depending on the load.
  • the calculation formula shown in Formula 2 is commonly used for engines having different characteristics. However, since different sulfuric acid condensation strength is used for each engine having different characteristics, the low-temperature corrosion rate calculated according to Formula 2 is temporarily Even if the attribute value and the load index value are the same, the value varies depending on the engine characteristics.
  • the wear amount specifying means 116 specifies the wear amount of the cylinder liner within the period (hereinafter referred to as “amount of wear within the period”) based on the low temperature corrosion rate specified by the low temperature corrosion rate specifying means 115.
  • the wear amount specifying means 116 sets the [period] of the target record to the low temperature corrosion rate stored in the [low temperature corrosion rate] of the target record for each record of the wear amount management table (FIG. 9).
  • the amount of low-temperature corrosion of the cylinder liner that has progressed within that period (hereinafter referred to as “low-temperature corrosion amount within the period”) is calculated by multiplying the length of the indicated period, and the cylinder liner corresponding to the calculated low-temperature corrosion amount within the period Is calculated according to a predetermined calculation formula.
  • the calculation formula used by the wear amount specifying unit 116 to calculate the wear amount within the period is, for example, generated in advance in the server device 12, received by the receiving unit 118 from the server device 12, and stored in the storage unit 114.
  • the wear amount specifying means 116 reads out the calculation formula from the storage means 114 and uses it.
  • the calculation formula used by the wear amount specifying means 116 for calculating the wear amount within the period may be a function equation having only the low temperature corrosion amount within the period as a variable, or in addition to the low temperature corrosion amount within the period, for example, an engine within the period. May be a function expression having parameters such as the number of rotations, the amount of cylinder lubricant injected into the cylinder within the period, and the value of [cumulative wear amount] of the record immediately before the target record.
  • the calculation formula used by the wear amount specifying means 116 for calculating the wear amount within the period varies depending on the characteristics of the piston and the cylinder liner.
  • the wear amount specifying means 116 stores the calculated wear amount within the period in [Wear amount within period] of the target record of the wear amount management table (FIG. 9). Further, the wear amount specifying means 116 adds the value obtained by adding the [in-period wear amount] value of the target record to the [cumulative wear amount] value of the previous record, Store in the Quantity. Note that “0” is stored in [cumulative wear amount] of the record corresponding to the period immediately after replacement of the cylinder liner. Therefore, the amount of wear during the period from the time of replacement of the cylinder liner to the end timing of each period is stored in [cumulative wear amount] of the wear amount management table.
  • the transmission unit 117 transmits various data to the server device 12.
  • the transmission unit 117 transmits data stored in the wear amount management table (FIG. 9) to the server device 12.
  • the receiving unit 118 receives various data from the server device 12. The above is the description of the functional configuration unit of the terminal device 11.
  • FIG. 10 is a diagram showing a functional configuration of the server device 12. That is, the computer 20 operates as a device having the configuration shown in FIG. 10 by executing data processing according to the program for the server device 12.
  • a functional configuration unit of the server apparatus 12 illustrated in FIG. 10 will be described.
  • the sample data acquisition unit 121 relates to each of various engines, a load index value within a certain period, one or more types of attribute values that affect the sulfuric acid concentration in the cylinder within the period, and a cylinder within the period. Obtain multiple sample data indicating the low temperature corrosion rate of the liner.
  • the sample data acquired by the sample data acquisition unit 121 is stored in the storage unit 122.
  • FIG. 11 is a diagram illustrating a data configuration of a table (hereinafter referred to as “low temperature corrosion rate sample table”) in which sample data acquired by the sample data acquiring unit 121 is stored.
  • the low-temperature corrosion rate sample table includes [engine ID], [period], [load index value], [attribute value 1], “attribute value 2”,..., [Attribute value n], [low-temperature corrosion rate] as fields.
  • [Engine ID] stores an engine identifier
  • [Period] to [Attribute Value n] have the same type as the data stored in the field of the same name in the wear amount management table (FIG. 9).
  • Data is stored in [Cold Corrosion Rate], which stores the low temperature corrosion rate of the cylinder liner.
  • the value stored in [Low Temperature Corrosion Rate] in the Low Temperature Corrosion Rate Sample Table is a value estimated based on, for example, the analysis result of iron contained in the cylinder drain oil.
  • the storage means 122 stores various data such as a sulfuric acid condensation strength table (FIG. 5) corresponding to various engines, in addition to the above-described low temperature corrosion rate sample table.
  • FOG. 5 sulfuric acid condensation strength table
  • the sulfuric acid dew condensation strength specifying means 123 specifies the sulfuric acid dew condensation strength according to the load index value for various engines based on the sample data stored in the low temperature corrosion rate sample table (FIG. 11).
  • [attribute value 1] stores the sulfur amount S input to the cylinder per unit time within the target period
  • [attribute value 2] inputs to the cylinder per unit time within the target period.
  • the sulfuric acid dew condensation strength specifying means 123 is based on the sulfur amount S, the basic substance amount C, and the low temperature corrosion rate CI stored in [low temperature corrosion rate], for example.
  • the sulfuric acid dew condensation strength WL corresponding to the load index value L is specified according to the above-described formula 1.
  • the sulfuric acid condensation intensity W L specified by the sulfuric acid condensation intensity specifying means 123 is stored in the storage means 122 in a state of being stored in a sulfuric acid condensation intensity table corresponding to the engine ID of the target engine.
  • the receiving unit 124 receives various data from the terminal device 11 and the terminal device 13.
  • the transmission means 125 transmits various data to the terminal device 11 and the terminal device 13.
  • the receiving unit 124 receives a request for a sulfuric acid condensation strength table from the terminal device 11.
  • the request includes an engine ID for identifying the engine of the ship 8 on which the terminal device 11 is mounted.
  • the transmission unit 125 reads out from the storage unit 122 a sulfuric acid dew condensation intensity table corresponding to the engine ID included in the request received by the reception unit 124, and transmits it to the requesting terminal device 11.
  • the receiving means 124 records the records of the wear amount management table (FIG. 9) transmitted from each of the terminal devices 11 mounted on various ships 8 and displays the engine of the ship 8 on which the terminal devices 11 are mounted. Received together with the identifying engine ID.
  • the storage unit 122 stores a copy of the wear amount management table stored in the storage unit 114 of the terminal device 11 according to each engine ID.
  • the records of the wear amount management table received from the terminal device 11 by the receiving unit 124 are sequentially added to the wear amount management table corresponding to the engine ID received together with the record in the storage unit 122.
  • the receiving means 124 receives a data browsing request from the terminal device 13.
  • the request includes, for example, the engine ID of the engine of the ship 8 for which the staff of the management company of the ship 8 wants to know the accumulated wear amount and the like.
  • the transmission unit 125 reads data such as the accumulated wear amount from the wear amount management table corresponding to the engine ID included in the request received by the reception unit 124 and transmits the data to the requesting terminal device 13.
  • the above is the description of the functional configuration unit of the server device 12.
  • the terminal device 13 is a general terminal device that accesses the server device 12 in accordance with a user operation and displays data acquired from the server device 12. Therefore, description of the functional configuration of the terminal device 13 is omitted.
  • the wear amount management table (FIG. 9) stored in the storage means 114 of the terminal device 11 includes the low temperature corrosion rate, the wear amount within the period, and the cumulative wear of the cylinder liner of the engine of the ship 8 on which the terminal device 11 is mounted. The quantity is stored continuously. Further, the storage means 122 of the server device 12 continuously accumulates the low temperature corrosion rate, the wear amount within the period, and the accumulated wear amount of the cylinder liner of the engine regarding various ship engines.
  • the terminal device 11 displays the low temperature corrosion and wear state of the cylinder liner of the ship 8 according to the data stored in the wear amount management table (FIG. 9) according to the operation of the crew of the ship 8 and the like. Further, the terminal device 13 accesses the server device 12 according to the operation of the staff of the ship management company, etc., and is designated according to the data stored in the wear amount management table corresponding to the designated ship engine. Displays the cold corrosion and wear status of the ship's cylinder liner.
  • FIG. 12 is a diagram exemplifying a wear amount management screen displayed by the terminal device 11 or the terminal device 13 in accordance with a user operation.
  • the ship name, the engine ID, and the last cylinder liner replacement date are displayed.
  • the last cylinder liner replacement date is the date to which the start timing of the period in which the cumulative wear amount was “0” lastly.
  • the current low-temperature corrosion rate and the current wear rate are displayed on the wear amount management screen.
  • the current low temperature corrosion rate is the low temperature corrosion rate indicated by the latest record.
  • the current wear rate is calculated by dividing the amount of wear within the period indicated by the latest record by the time length of the period.
  • the wear amount management screen displays, for example, “Low-temperature corrosion is progressing rapidly. Change of fuel oil type, increase of cylinder lubricant, change of ship speed. Please consider. "Is displayed. If the current wear rate exceeds a predetermined threshold when the current low-temperature corrosion rate is less than or equal to the threshold value, the wear amount management screen displays, for example, “Wear is progressing rapidly. Please consider. "Is displayed.
  • the transition of the accumulated wear amount is displayed, for example, in a graph.
  • the graph displayed on the wear amount management screen shows the date on which the cumulative wear amount is estimated to reach the limit value when it is assumed that the wear has progressed at the same pace as the past results.
  • the crew of the ship 8 and the staff of the management company of the ship 8 can know the low temperature corrosion and wear state of the cylinder liner in real time by looking at the wear amount management screen.
  • the wear amount specifying system 1 specifies the past or present low-temperature corrosion and wear state of the cylinder liner. Instead of this, or in addition, a configuration in which the wear amount specifying system 1 specifies the state of low temperature corrosion and wear of the cylinder liner in the future may be employed.
  • the terminal device 11 acquires and stores data indicating the navigation schedule of the ship 8 in the future, the type of fuel oil to be used, the amount of cylinder lubricant to be used, and the like.
  • data such as the navigation schedule of the ship 8 may be input to the terminal device 11 by a crew of the ship 8, for example, or the terminal device 11 may receive from the server device 12.
  • the terminal device 11 is based on data such as the navigation schedule of the ship 8, the engine load index value in the future navigation of the ship 8, the amount of sulfur contained in the fuel oil used, and the base contained in the cylinder lubricant used.
  • the amount of the toxic substance is specified, and the low temperature corrosion rate, the wear amount within the period, and the cumulative wear amount are specified based on the specified data.
  • the terminal device 11 displays the specified information on, for example, a crew member of the ship 8.
  • the terminal device 11 may notify the crew of the ship 8 when the accumulated wear amount specified as described above satisfies a predetermined condition. For example, the terminal device 11 specifies the time when the accumulated wear amount reaches a predetermined threshold, and notifies the crew of the ship 8 as the cylinder liner replacement time.
  • the terminal device 11 has a predetermined condition based on the low temperature corrosion rate specified for the future navigation by the low temperature corrosion rate specifying means 115 or the amount of wear in the period specified for the future navigation by the wear amount specifying means 116.
  • a configuration including an appropriate state specifying unit that specifies a combination of the engine load satisfying the above and the type of fuel oil, the amount of cylinder lubricant, and the like as an appropriate state may be employed.
  • An example of the predetermined condition used by the appropriate state specifying means for specifying the appropriate state is that the total value of the cost of the fuel oil, the cost of the cylinder lubricant, and the cost associated with replacement of the cylinder liner is equal to or less than a predetermined threshold value, or The condition is that the total value is minimized.
  • the terminal device 11 displays the appropriate state specified by the appropriate state specifying means, for example, on the crew of the ship 8 or the like. The crew or the like adjusts the navigation speed of the ship 8 according to the appropriate state presented from the terminal device 11, and also adjusts the type of fuel oil to be used, the amount of cylinder lubricant, etc. Costs associated with navigation can be reduced.
  • sulfuric acid dew intensity specification unit 123 it is identified by the sulfuric acid dew intensity specification unit 123 based on the number of sample data obtained by the sulfuric acid dew intensity W L is the sample data acquisition unit 121.
  • officials of the management company of the ship 8 it may be determined sulfuric acid dew strength W L.
  • officials of the management company of the ship 8 determines the sulfuric acid dew intensity W L based upon the characteristics of the engine mounted in a ship 8. Then, in light of the results of content iron analysis of the cylinder drain oil, determined to confirm the validity of the sulfuric acid dew strength W L, to correct the sulfuric acid dew intensity W L as required.
  • sulfuric acid dew strength was determined by a human W L may be used in certain low-temperature corrosion rate CI by low-temperature corrosion rate identifying means 115.
  • the sample data sulfate condensation strength specifying unit 123 is used in particular sulfuric acid dew intensity W L includes, for example, the estimated low corrosion rates CI based on the results of containing iron analysis of the cylinder drain oil . Analyzing the iron content of cylinder drain oil takes time and money. Therefore, it may be difficult to obtain the required number of sample data. Therefore, for example, already based on the sulfuric acid dew intensity W L which is identified by condensation server device 12 is sulfate strength specifying unit 123, configured to identify the sulfuric acid dew intensity W L is adopted to an engine without a sufficient number of sample data is obtained May be.
  • the sample data acquisition means 121 various relates each type of engine, a sulfuric acid dew intensity W L which has already been identified by the sulfuric acid dew strength specifying means 123, the characteristic of the engine (e.g., derating map shape, Sample data including one or more characteristic values indicating a set temperature of the cooling water of the cylinder liner) is acquired.
  • a sulfuric acid dew intensity W L which has already been identified by the sulfuric acid dew strength specifying means 123
  • the characteristic of the engine e.g., derating map shape, Sample data including one or more characteristic values indicating a set temperature of the cooling water of the cylinder liner
  • the server device 12 based on the number of sample data acquired by the sample data acquisition unit 121 includes a relationship specifying means for specifying a relationship between the characteristic value and the sulfuric acid dew intensity W L of the engine.
  • the relationship identifying means for example on the basis of the sample data sample data obtained by the obtaining unit 121, multiple regression analysis for the dependent variable sulfate condensation intensity W L, independent variable characteristic values of the engine (explanatory variables) by known statistical methods etc., to identify the characteristic values of the engine and relationship of sulfuric acid dew intensity W L.
  • the server device 12 includes a characteristic value obtaining means sulfate condensation intensity W L to obtain the characteristic values of the non-specific engine.
  • Sulfate condensation intensity specifying means 123 the characteristic value acquired by the characteristic value obtaining means, by substituting the equation specified by the relationship specifying unit specifies a sulfate condensation intensity W L was unidentified.
  • sulfuric acid condensation intensity W L is given as discrete values. Alternatively, it may be sulfuric acid dew intensity W L is given as a continuous value.
  • the terminal device 11 or the server device 12 specifies the low temperature corrosion rate and the amount of wear within the period by calculation according to the calculation formula. Instead, a configuration in which the terminal device 11 or the server device 12 identifies these values by referring to the correspondence table may be employed.
  • a configuration in which the server device 12 performs at least a part of the processing performed by the terminal device 11 in the above-described embodiment may be employed.
  • a configuration in which the terminal device 11 performs at least a part of the processing that the server device 12 performs in the above-described embodiment may be employed.
  • the terminal device 11 and the server device 12 are realized by a general computer executing processing according to a program. Instead, at least one of the terminal device 11 and the server device 12 may be configured as a so-called dedicated device.
  • the program executed by the computer 10 to realize the terminal device 11 may be downloaded to the computer 10 via a network such as the Internet, or continuously recorded on a recording medium. May be distributed and read by the computer 10 from the recording medium.
  • the program executed by the computer 20 to implement the server device 12 may be downloaded to the computer 20 via a network such as the Internet, or is continuously recorded on a recording medium. May be distributed and read by the computer 20 from the recording medium.

Abstract

A terminal device (11) stores, in a storage means (114), sulfuric acid condensation intensity acquired by a sulfuric acid condensation intensity acquisition means (111). The sulfuric acid condensation intensity is an index value indicating the ease in which sulfuric acid condensation occurs in a cylinder, and is specified in advance according to a load of an engine. A load index value acquisition means (112) acquires a current load index of an engine. An attribute value acquisition means (113) acquires an attribute value (the amount of sulfur included in a fuel oil, the amount of calcium included in a cylinder lubricant oil, or the like) affecting the current sulfuric acid concentration in the cylinder. A low-temperature corrosion rate specifying means (115) reads, from the storage means (114), the sulfuric acid condensation intensity according to the load index value acquired by the load index value acquisition means (112), and specifies the low-temperature corrosion rate of a cylinder liner on the basis of the read sulfuric acid condensation intensity and the attribute value acquired by the attribute value acquisition means (113). An abrasion amount specifying means (116) specifies the abrasion amount of the cylinder liner on the basis of the low-temperature corrosion rate specified by the low-temperature corrosion amount specifying means (115).

Description

エンジンのシリンダ内における低温腐食の生じやすさを特定するための装置、プログラムおよび記録媒体Apparatus, program, and recording medium for identifying the likelihood of low temperature corrosion in an engine cylinder
　本発明は、エンジンのシリンダ内における低温腐食の生じやすさを特定するための技術に関する。 The present invention relates to a technique for specifying the susceptibility of low temperature corrosion in a cylinder of an engine.
　エンジンのシリンダライナの摩耗量が限界値を超えると、シリンダ内の気密性が保てず、エンジンの出力が十分に得られない等の不都合が生じる。特に船舶に搭載されているエンジンのシリンダライナに関しては、航行中にシリンダライナの摩耗量が限界値を超えると、航行不能等の深刻な事態を招く場合がある。従って、船舶の乗組員や運航管理会社の職員等は、シリンダライナの適切な交換時期を知りたい、というニーズを持っている。 If the wear amount of the cylinder liner of the engine exceeds the limit value, airtightness in the cylinder cannot be maintained, and problems such as insufficient engine output occur. In particular, with respect to a cylinder liner of an engine mounted on a ship, if the wear amount of the cylinder liner exceeds a limit value during navigation, a serious situation such as inability to navigate may be caused. Therefore, the crew of the ship, the staff of the operation management company, and the like have a need to know the appropriate replacement period of the cylinder liner.
　船舶に搭載されているエンジン部品の適切な保守タイミングを提示する仕組みを開示する文献として、例えば特許文献１がある。特許文献１には、ディーゼル主機関メーカが管理する業務サーバが、船舶に搭載されたディーゼル主機関の部品保守データを船舶から受信し、受信した部品保守データと部品の使用限界値等のデータとに基づき部品保守解析を行い、部品保守解析の結果を船舶および運航管理会社のパソコンに送信する、というシステムが開示されている。特許文献１に開示のシステムによれば、船舶の乗組員や運航管理会社の職員等は、部品の損傷の進行のトレンドを見ることにより、部品が使用限界値に達するタイミングを推定することができる。 For example, Patent Document 1 discloses a document that discloses a mechanism for presenting appropriate maintenance timings for engine parts mounted on a ship. In Patent Document 1, a business server managed by a diesel main engine manufacturer receives parts maintenance data of a diesel main engine mounted on a ship from the ship, and receives the received parts maintenance data, parts usage limit values, etc. A system is disclosed in which parts maintenance analysis is performed based on the above and the result of parts maintenance analysis is transmitted to a ship and a personal computer of an operation management company. According to the system disclosed in Patent Document 1, a crew member of a ship, a staff of an operation management company, or the like can estimate a timing at which a part reaches a use limit value by observing a trend of damage of the part. .
特開２００２－２２１０７６号公報Japanese Patent Laid-Open No. 2002-221076
　船舶の乗組員等は、保守点検時にシリンダライナを計測目視した摩耗量を記録し摩耗の進行のトレンドを見ることにより、シリンダライナの摩耗量が限界値に達するタイミングを推定することができる。ただし、シリンダライナに低温腐食が生じると、摩耗が急速に進行するため、推定していたタイミングよりも早く摩耗量が限界値に達してしまう危険性がある。従って、船舶の乗組員等は、シリンダがどの程度、低温腐食の生じやすい状況にあるかを知りたい、というニーズを持っている。 Ship crews and the like can estimate the timing at which the cylinder liner wear amount reaches the limit value by recording the wear amount obtained by measuring the cylinder liner during maintenance and checking the trend of wear. However, if low temperature corrosion occurs in the cylinder liner, wear proceeds rapidly, and there is a risk that the wear amount reaches the limit value earlier than the estimated timing. Accordingly, ship crews and the like have a need to know how much the cylinder is susceptible to low temperature corrosion.
　上記の事情に鑑み、本発明は、エンジンのシリンダ内における低温腐食の生じやすさを特定する手段を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide a means for specifying the susceptibility of low temperature corrosion in a cylinder of an engine.
　上記課題を解決するため、本発明は、エンジンの負荷の大小を示す負荷指標値を取得する負荷指標値取得手段と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値を取得する属性値取得手段と、前記負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を取得する硫酸結露強度取得手段と、前記属性値と、前記硫酸結露強度とに基づき、前記シリンダ内の低温腐食の進行速度の指標を示す低温腐食指標値を特定する低温腐食速度特定手段とを備える装置を第１の態様として提案する。 In order to solve the above problems, the present invention provides a load index value acquisition means for acquiring a load index value indicating the magnitude of engine load, and at least the sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration. Attribute value acquisition means for acquiring an attribute value which is one value, sulfuric acid condensation intensity acquisition means for acquiring sulfuric acid condensation intensity indicating the likelihood of sulfuric acid condensation in the cylinder according to the load index value, and A device comprising a low temperature corrosion rate specifying means for specifying a low temperature corrosion index value indicating an index of the progress rate of low temperature corrosion in the cylinder based on the attribute value and the sulfuric acid condensation strength is proposed as a first aspect.
　第１の態様にかかる装置において、前記低温腐食指標値に基づき前記シリンダ内のシリンダライナの摩耗量を特定する摩耗量特定手段を備える、という構成が第２の態様として採用されてもよい。 In the apparatus according to the first aspect, a configuration may be adopted as a second aspect in which a wear amount specifying means for specifying the wear amount of the cylinder liner in the cylinder is provided based on the low temperature corrosion index value.
　第１の態様にかかる装置において、前記低温腐食指標値に基づき、予め定められた条件を満たす前記負荷指標値と前記属性値との組み合わせを適正状態として特定する適正状態特定手段を備える、という構成が第３の態様として採用されてもよい。 The apparatus according to the first aspect includes a proper state specifying unit that specifies a combination of the load index value and the attribute value satisfying a predetermined condition as an appropriate state based on the low temperature corrosion index value. May be employed as the third aspect.
　第２の態様にかかる装置において、前記摩耗量に基づき、予め定められた条件を満たす前記負荷指標値と前記属性値との組み合わせを適正状態として特定する適正状態特定手段を備える、という構成が第４の態様として採用されてもよい。 In the apparatus according to the second aspect, there is provided a configuration including an appropriate state specifying means for specifying a combination of the load index value and the attribute value satisfying a predetermined condition as an appropriate state based on the wear amount. It may be adopted as the fourth aspect.
　第１乃至第４のいずれかの態様にかかる装置において、前記属性値取得手段は、前記エンジンで使用される燃料油に含まれる硫黄量を前記属性値として取得する、という構成が第５の態様として採用されてもよい。 In the device according to any one of the first to fourth aspects, a fifth aspect is such that the attribute value acquisition unit acquires the amount of sulfur contained in fuel oil used in the engine as the attribute value. May be employed.
　第１乃至第５のいずれかの態様にかかる装置において、前記属性値取得手段は、前記エンジンで使用されるシリンダ潤滑油に含まれる塩基性物質の量を前記属性値として取得する、という構成が第６の態様として採用されてもよい。 In the apparatus according to any one of the first to fifth aspects, the attribute value acquisition unit acquires the amount of a basic substance contained in a cylinder lubricant used in the engine as the attribute value. You may employ | adopt as a 6th aspect.
　また、本発明は、エンジンの負荷の大小を示す負荷指標値と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値と、前記負荷指標値に応じた負荷で運転される前記エンジンの前記属性値に応じた硫酸濃度のシリンダ内の低温腐食の進行速度の指標値とを示すサンプルデータを複数取得するサンプルデータ取得手段と、前記サンプルデータ取得手段により取得された複数のサンプルデータに基づき、負荷指標値に応じた指標値であって、前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を特定する硫酸結露強度特定手段とを備える装置を第７の態様として提案する。 The present invention also provides a load index value indicating the magnitude of engine load, an attribute value that is at least one of the sulfuric acid concentration in the cylinder of the engine or an attribute that affects the sulfuric acid concentration, and the load index value. Sample data acquisition means for acquiring a plurality of sample data indicating an index value of the progress rate of low-temperature corrosion in a cylinder having a sulfuric acid concentration corresponding to the attribute value of the engine operated at a load corresponding to the load, and the sample data acquisition Sulfuric acid dew condensation intensity specifying means for specifying sulfuric acid dew condensation intensity that is an index value corresponding to a load index value and indicates the easiness of condensation of sulfuric acid in the cylinder based on a plurality of sample data obtained by the means; The apparatus provided is proposed as a seventh aspect.
　また、本発明は、特性の異なる複数のエンジンの各々に関し、当該エンジンの特性を示す特性値と、当該エンジンの負荷の大小を示す負荷指標値に応じたシリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度とを含むサンプルデータを取得するサンプルデータ取得手段と、前記サンプルデータ取得手段により取得された複数のサンプルデータに基づき、前記特性値と前記硫酸結露強度との関係を特定する関係特定手段とを備える装置を第８の態様として提案する。 Further, the present invention relates to each of a plurality of engines having different characteristics, and is liable to cause condensation of sulfuric acid in a cylinder in accordance with a characteristic value indicating the characteristics of the engine and a load index value indicating the magnitude of the load of the engine. A sample data acquisition means for acquiring sample data including sulfuric acid dew condensation intensity, and a relationship for specifying a relationship between the characteristic value and the sulfuric acid condensation intensity based on a plurality of sample data acquired by the sample data acquisition means An apparatus provided with specifying means is proposed as an eighth aspect.
　また、本発明は、コンピュータに、エンジンの負荷の大小を示す負荷指標値を取得する処理と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値を取得する処理と、前記負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を取得する処理と、前記属性値と前記硫酸結露強度とに基づき、前記シリンダ内の低温腐食の進行速度の指標値を特定する処理とを実行させるためのプログラムを第９の態様として提案する。 Further, the present invention provides an attribute which is at least one value of processing for obtaining a load index value indicating the magnitude of engine load in a computer and sulfuric acid concentration in the engine cylinder or an attribute affecting the sulfuric acid concentration. Based on the processing for obtaining a value, the processing for obtaining sulfuric acid condensation strength indicating the likelihood of sulfuric acid condensation in the cylinder according to the load index value, and the attribute value and the sulfuric acid condensation strength, A program for executing a process for specifying an index value of the progress rate of low-temperature corrosion is proposed as a ninth aspect.
　また、本発明は、コンピュータに、エンジンの負荷の大小を示す負荷指標値と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値と、前記負荷指標値に応じた負荷で運転される前記エンジンの前記属性値に応じた硫酸濃度のシリンダ内の低温腐食の進行速度の指標値とを示すサンプルデータを複数取得する処理と、前記複数のサンプルデータに基づき、負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を特定する処理とを実行させるためのプログラムを第１０の態様として提案する。 Further, the present invention provides a computer with a load index value indicating the magnitude of engine load, a sulfuric acid concentration in the cylinder of the engine or an attribute value that is at least one value of an attribute affecting the sulfuric acid concentration, A process of obtaining a plurality of sample data indicating an index value of a progress rate of low-temperature corrosion in a cylinder having a sulfuric acid concentration according to the attribute value of the engine operated at a load according to a load index value; and the plurality of samples Based on the data, a program for executing a process for specifying the sulfuric acid condensation intensity indicating the ease of the condensation of sulfuric acid in the cylinder according to the load index value is proposed as a tenth aspect.
　また、本発明は、コンピュータに、特性の異なる複数のエンジンの各々に関し、当該エンジンの特性を示す特性値と、当該エンジンの負荷の大小を示す負荷指標値に応じたシリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度とを含むサンプルデータを取得する処理と、前記複数のサンプルデータに基づき、前記特性値と前記硫酸結露強度との関係を特定する処理とを実行させるためのプログラムを第１１の態様として提案する。 Further, the present invention relates to a computer in which each of a plurality of engines having different characteristics has a characteristic value indicating the characteristics of the engine and a dew condensation of sulfuric acid in the cylinder according to a load index value indicating the magnitude of the load of the engine. A program for executing processing for obtaining sample data including sulfuric acid dew condensation intensity indicating the likelihood of occurrence, and processing for specifying a relationship between the characteristic value and the sulfuric acid dew condensation intensity based on the plurality of sample data Proposed as an eleventh aspect.
　また、本発明は、第９乃至第１１のいずれかの態様にかかるプログラムを持続的に記録するコンピュータ読み取り可能な記録媒体を第１２の態様として提案する。 The present invention proposes as a twelfth aspect a computer-readable recording medium for continuously recording a program according to any one of the ninth to eleventh aspects.
　本発明の第１に態様によれば、エンジンのシリンダ内の低温腐食の進行速度がモニタリング可能となる。 According to the first aspect of the present invention, the progress rate of the low temperature corrosion in the cylinder of the engine can be monitored.
　本発明の第２の態様によれば、シリンダライナの摩耗量がモニタリング可能となる。 According to the second aspect of the present invention, the wear amount of the cylinder liner can be monitored.
　本発明の第３の態様によれば、シリンダ内の低温腐食の進行速度が考慮された、エンジンの負荷およびシリンダ内の硫酸濃度または当該硫酸濃度に影響与える属性値の適正状態が特定される。 According to the third aspect of the present invention, the appropriate state of the engine load and the sulfuric acid concentration in the cylinder or the attribute value that affects the sulfuric acid concentration in consideration of the progress rate of the low temperature corrosion in the cylinder is specified.
　本発明の第４の態様によれば、シリンダライナの摩耗量が考慮された、エンジンの負荷およびシリンダ内の硫酸濃度または当該硫酸濃度に影響与える属性値の適正状態が特定される。 According to the fourth aspect of the present invention, the appropriate state of the engine load and the sulfuric acid concentration in the cylinder or the attribute value that affects the sulfuric acid concentration in consideration of the wear amount of the cylinder liner is specified.
　本発明の第５の態様によれば、燃料油に含まれる硫黄量が考慮されたシリンダ内の低温腐食の進行速度が特定される。 According to the fifth aspect of the present invention, the progress rate of the low-temperature corrosion in the cylinder considering the amount of sulfur contained in the fuel oil is specified.
　本発明の第６の態様によれば、シリンダ潤滑油に含まれる塩基性物質の量が考慮されたシリンダ内の低温腐食の進行速度が特定される。 According to the sixth aspect of the present invention, the progress rate of the low-temperature corrosion in the cylinder in consideration of the amount of the basic substance contained in the cylinder lubricating oil is specified.
　本発明の第７の態様によれば、エンジンの負荷に応じた、シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度が特定される。 According to the seventh aspect of the present invention, the sulfuric acid dew condensation intensity indicating the easiness of sulfuric acid dew condensation in the cylinder according to the engine load is specified.
　本発明の第８の態様によれば、エンジンの特性と硫酸結露強度との関係が特定される。 According to the eighth aspect of the present invention, the relationship between engine characteristics and sulfuric acid dew condensation strength is specified.
　本発明の第９、第１０および第１１の態様によれば、コンピュータにより、本発明の第１、第７および第８の態様にかかる装置が実現される。 According to the ninth, tenth and eleventh aspects of the present invention, the apparatus according to the first, seventh and eighth aspects of the present invention is realized by a computer.
　本発明の第１２の態様によれば、記録媒体からプログラムを読み取り実行可能なコンピュータにより、本発明の第１、第７および第８の態様にかかる装置が実現される。 According to the twelfth aspect of the present invention, the apparatus according to the first, seventh, and eighth aspects of the present invention is realized by a computer that can read and execute a program from a recording medium.
一実施形態にかかる摩耗量特定システムの全体構成を示した図。The figure which showed the whole structure of the abrasion amount specific | identification system concerning one Embodiment. 一実施形態にかかる端末装置のハードウェアとして採用されるコンピュータの基本構成を示した図。The figure which showed the basic composition of the computer employ | adopted as hardware of the terminal device concerning one Embodiment. 一実施形態にかかるサーバ装置のハードウェアとして採用されるコンピュータの基本構成を示した図。The figure which showed the basic composition of the computer employ | adopted as hardware of the server apparatus concerning one Embodiment. 一実施形態にかかる端末装置の機能構成を示した図。The figure which showed the function structure of the terminal device concerning one Embodiment. 一実施形態にかかる端末装置に記憶される硫酸結露強度テーブルのデータ構成を示した図。The figure which showed the data structure of the sulfuric acid dew condensation intensity | strength table memorize | stored in the terminal device concerning one Embodiment. 一実施形態にかかる端末装置で用いられる硫酸結露強度の概念を説明するための図。The figure for demonstrating the concept of the sulfuric acid dew condensation intensity | strength used with the terminal device concerning one Embodiment. 一実施形態にかかる端末装置で用いられる硫酸結露強度の概念を説明するための図。The figure for demonstrating the concept of the sulfuric acid dew condensation intensity | strength used with the terminal device concerning one Embodiment. 一実施形態にかかる端末装置で用いられる硫酸結露強度の概念を説明するための図。The figure for demonstrating the concept of the sulfuric acid dew condensation intensity | strength used with the terminal device concerning one Embodiment. 一実施形態にかかる端末装置に記憶される摩耗量管理テーブルのデータ構成を例示した図。The figure which illustrated the data composition of the wear amount management table memorized by the terminal unit concerning one embodiment. 一実施形態にかかるサーバ装置の機能構成を示した図。The figure which showed the function structure of the server apparatus concerning one Embodiment. 一実施形態にかかるサーバ装置に記憶される低温腐食指標値サンプルテーブルのデータ構成を例示した図。The figure which illustrated the data structure of the low temperature corrosion index value sample table memorize | stored in the server apparatus concerning one Embodiment. 一実施形態にかかる端末装置において表示される画面を例示した図。The figure which illustrated the screen displayed in the terminal unit concerning one embodiment.
［実施形態］
　以下に本発明の一実施形態にかかる摩耗量特定システム１を説明する。図１は摩耗量特定システム１の全体構成を示した図である。摩耗量特定システム１は、船舶８に搭載されているエンジンのシリンダライナの摩耗量を継続的に特定するためのシステムである。なお、摩耗量特定システム１は、シリンダライナの低温腐食速度を特定し、特定した低温腐食速度を反映した摩耗量を特定する。 [Embodiment]
The wear amount specifying system 1 according to an embodiment of the present invention will be described below. FIG. 1 is a diagram showing the overall configuration of the wear amount specifying system 1. The wear amount specifying system 1 is a system for continuously specifying the wear amount of the cylinder liner of the engine mounted on the ship 8. The wear amount specifying system 1 specifies the low temperature corrosion rate of the cylinder liner, and specifies the wear amount reflecting the specified low temperature corrosion rate.
　シリンダライナの摩耗量とは、シリンダライナのうち摩耗により失われた部分の量を意味する。以下の説明において、シリンダライナの摩耗量は、未使用状態のシリンダライナの厚さを基準とした場合の厚さの減少量で表され、単位はミリメートルであるものとする。ただし、摩耗量の表現形式はこれに限られず、例えばシリンダライナの未使用状態からの質量の減少量（単位はグラム）等で摩耗量が表されてもよい。なお、シリンダライナの摩耗量は厳密には軸方向の位置および軸周りの位置によって異なるが、以下の説明においてはそれらの平均値が用いられるものとする。 ¡The amount of wear of the cylinder liner means the amount of the portion of the cylinder liner lost due to wear. In the following description, the amount of wear of the cylinder liner is represented by the amount of decrease in thickness based on the thickness of the unused cylinder liner, and the unit is millimeters. However, the expression format of the wear amount is not limited to this, and the wear amount may be represented by, for example, a decrease in mass (unit: grams) from the unused state of the cylinder liner. Strictly speaking, the wear amount of the cylinder liner varies depending on the position in the axial direction and the position around the axis, but in the following description, the average value thereof is used.
　シリンダライナの低温腐食速度とは、シリンダライナにおける低温腐食の進行速度（低温腐食により変質が進行する速度）を意味する。以下の説明において、シリンダライナの低温腐食速度は、単位時間において低温腐食により変質する部分の深さで表され、単位はミリメートル／１０００時間（mm/1000h）であるものとする。ただし、低温腐食速度の表現形式はこれに限られず、例えば単位時間において低温腐食により変質する部分の質量（単位はグラム／日）等で低温腐食速度が表されてもよい。また、低温腐食速度そのものではなく低温腐食速度の大小を示す指標値が低温腐食速度に代えて用いられてもよい。なお、シリンダライナの低温腐食速度（または低温腐食速度の大小を示す指標値）は厳密には軸方向の位置および軸周りの位置によって異なるが、以下の説明においてはそれらの平均値が用いられるものとする。 The low-temperature corrosion rate of the cylinder liner means the low-speed corrosion progression rate (the rate at which the deterioration is caused by low-temperature corrosion) in the cylinder liner. In the following description, the low temperature corrosion rate of the cylinder liner is represented by the depth of the portion that is altered by low temperature corrosion in unit time, and the unit is assumed to be millimeter / 1000 hours (mm / 1000 h). However, the expression format of the low-temperature corrosion rate is not limited to this, and the low-temperature corrosion rate may be expressed by, for example, the mass (unit: grams / day) of the portion that is altered by low-temperature corrosion in unit time. In addition, an index value indicating the magnitude of the low temperature corrosion rate instead of the low temperature corrosion rate itself may be used instead of the low temperature corrosion rate. Strictly speaking, the low temperature corrosion rate of the cylinder liner (or index value indicating the magnitude of the low temperature corrosion rate) varies depending on the position in the axial direction and the position around the axis, but in the following description, the average value thereof is used. And
　摩耗量特定システム１は、船舶８に搭載される端末装置１１と、通信衛星９を介して端末装置１１との間でデータ通信を行うサーバ装置１２と、例えば陸上で船舶８の管理会社の職員等がサーバ装置１２に記憶されているデータを閲覧するために用いる端末装置１３を備える。 The wear amount specifying system 1 includes a terminal device 11 mounted on a ship 8, a server device 12 that performs data communication with the terminal device 11 via a communication satellite 9, and staff of a management company of the ship 8 on land, for example. And the like include a terminal device 13 used for browsing data stored in the server device 12.
　なお、図１には船舶８を１つのみ示しているが、船舶８の数は通常複数である。船舶８の数が複数の場合、複数の船舶８の各々に搭載された端末装置１１がサーバ装置１２との間でデータ通信を行う。また、図１には端末装置１３を１つのみ示しているが、端末装置１３の数はサーバ装置１２に記憶されているデータの閲覧者の人数に応じて変化する。また、図１に示される端末装置１３は陸上に配置されているが、端末装置１３の配置場所は陸上に限られず、例えば船舶８内であってもよい。 Although only one ship 8 is shown in FIG. 1, the number of ships 8 is usually plural. When the number of the ships 8 is plural, the terminal device 11 mounted on each of the plural ships 8 performs data communication with the server apparatus 12. Although only one terminal device 13 is shown in FIG. 1, the number of terminal devices 13 varies depending on the number of viewers of data stored in the server device 12. Moreover, although the terminal device 13 shown by FIG. 1 is arrange | positioned on the land, the arrangement | positioning location of the terminal device 13 is not restricted to the land, For example, the inside of the ship 8 may be sufficient.
　端末装置１１および端末装置１３のハードウェア構成は、例えば一般的な端末装置用のコンピュータである。図２は、端末装置１１および端末装置１３のハードウェアとして採用されるコンピュータ１０の基本構成を示した図である。コンピュータ１０は、各種データを記憶するメモリ１０１、メモリ１０１に記憶されているプログラムに従う各種データ処理を行うプロセッサ１０２、他の装置との間でデータ通信を行うＩＦ（Interface）である通信ＩＦ１０３、ユーザに対し画像を表示する液晶ディスプレイ等の表示装置１０４、ユーザの操作を受け付けるキーボード等の操作装置１０５を備える。なお、コンピュータ１０に内蔵される表示装置１０４に代えて、もしくは加えて、コンピュータ１０に接続される外付けの表示装置が用いられてもよい。また、コンピュータ１０に内蔵される操作装置１０５に代えて、もしくは加えて、コンピュータ１０に接続される外付けの操作装置が用いられてもよい。 The hardware configuration of the terminal device 11 and the terminal device 13 is, for example, a computer for a general terminal device. FIG. 2 is a diagram illustrating a basic configuration of the computer 10 employed as hardware of the terminal device 11 and the terminal device 13. The computer 10 includes a memory 101 that stores various data, a processor 102 that performs various data processing according to a program stored in the memory 101, a communication IF 103 that is an IF (Interface) that performs data communication with other devices, a user A display device 104 such as a liquid crystal display for displaying an image, and an operation device 105 such as a keyboard for receiving a user operation. Note that an external display device connected to the computer 10 may be used instead of or in addition to the display device 104 built in the computer 10. Further, instead of or in addition to the operation device 105 built in the computer 10, an external operation device connected to the computer 10 may be used.
　サーバ装置１２のハードウェア構成は、例えば一般的なサーバ装置用のコンピュータである。図３は、サーバ装置１２のハードウェアとして採用されるコンピュータ２０の基本構成を示した図である。コンピュータ２０は、各種データを記憶するメモリ２０１、メモリ２０１に記憶されているプログラムに従う各種データ処理を行うプロセッサ２０２、他の装置との間でデータ通信を行う通信ＩＦ２０３を備える。 The hardware configuration of the server device 12 is, for example, a general server device computer. FIG. 3 is a diagram showing a basic configuration of the computer 20 employed as hardware of the server device 12. The computer 20 includes a memory 201 that stores various data, a processor 202 that performs various data processing according to a program stored in the memory 201, and a communication IF 203 that performs data communication with other devices.
　図４は、端末装置１１の機能構成を示した図である。すなわち、コンピュータ１０は、端末装置１１用のプログラムに従うデータ処理を実行することにより、図４に示す構成を備える装置として動作する。以下に図４に示される端末装置１１の機能構成部を説明する。 FIG. 4 is a diagram illustrating a functional configuration of the terminal device 11. That is, the computer 10 operates as a device having the configuration shown in FIG. 4 by executing data processing according to the program for the terminal device 11. Below, the function structure part of the terminal device 11 shown by FIG. 4 is demonstrated.
　硫酸結露強度取得手段１１１は、端末装置１１が搭載されている船舶８のエンジンに応じた硫酸結露強度を取得する。硫酸結露強度とは、エンジンが或る負荷で運転しているときのシリンダ内における硫酸の結露の生じやすさを示す指標値であり、エンジン毎に様々な負荷に応じて予め特定されている。 The sulfuric acid dew condensation strength acquisition means 111 acquires the sulfuric acid dew condensation strength according to the engine of the ship 8 on which the terminal device 11 is mounted. The sulfuric acid dew condensation intensity is an index value that indicates the degree of the possibility of sulfuric acid dew condensation in the cylinder when the engine is operating at a certain load, and is specified in advance for each engine according to various loads.
　図５は、硫酸結露強度取得手段１１１が取得する硫酸結露強度の格納されたテーブルのデータ構成を示した図である。以下、図５に示すテーブルを「硫酸結露強度テーブル」という。硫酸結露強度テーブルは、サーバ装置１２から端末装置１１に送信され、硫酸結露強度取得手段１１１により取得される。これに代えて、硫酸結露強度テーブルが、例えば船舶８の乗組員等により端末装置１１に入力され、硫酸結露強度取得手段１１１により取得されてもよい。 FIG. 5 is a diagram showing the data structure of a table storing the sulfuric acid condensation intensity acquired by the sulfuric acid condensation intensity acquisition means 111. Hereinafter, the table shown in FIG. 5 is referred to as a “sulfuric acid condensation strength table”. The sulfate condensation intensity table is transmitted from the server device 12 to the terminal device 11 and acquired by the sulfate condensation intensity acquisition unit 111. Instead of this, a sulfate condensation intensity table may be input to the terminal device 11 by a crew member of the ship 8 and acquired by the sulfate condensation intensity acquisition unit 111, for example.
　硫酸結露強度テーブルのデータは、エンジンＩＤ（Identifier）により識別されるエンジン毎に異なる。硫酸結露強度テーブルの「負荷指標値」欄にはエンジンの負荷の大小を示す負荷指標値が格納されている。硫酸結露強度テーブルの「硫酸結露強度」欄には負荷指標値（図５の例では、１０％、２０％、・・・、１００％）の各々に応じた硫酸結露強度が格納されている。以下、負荷指標値がＬ（％）であるときの硫酸結露強度をＷLとする。 The data of the sulfuric acid dew condensation intensity table is different for each engine identified by the engine ID (Identifier). In the “load index value” column of the sulfuric acid condensation intensity table, a load index value indicating the magnitude of the engine load is stored. In the “sulfuric condensation intensity” column of the sulfuric acid condensation intensity table, sulfuric acid condensation intensity corresponding to each of load index values (10%, 20%,..., 100% in the example of FIG. 5) is stored. Hereinafter, the sulfuric acid dew strength when load index value is L (%) and W L.
　図６～図８は、硫酸結露強度の概念を説明するためのグラフである。図６は或るエンジン（以下、「エンジンＥ」とする）が負荷指標値１０％に応じた負荷で運転するときの硫酸結露強度Ｗ10を示すグラフであり、図７はエンジンＥが負荷指標値３０％に応じた負荷で運転するときの硫酸結露強度Ｗ30を示すグラフであり、図８はエンジンＥが負荷指標値９０％に応じた負荷で運転するときの硫酸結露強度Ｗ90を示すグラフである。図６～図８に示されるグラフのＸ軸はシリンダ内におけるピストン位置を示し、Ｙ軸は温度を示している。 6 to 8 are graphs for explaining the concept of sulfuric acid dew condensation strength. FIG. 6 is a graph showing sulfuric acid dew condensation intensity W 10 when a certain engine (hereinafter referred to as “engine E”) is operated at a load corresponding to a load index value of 10%, and FIG. FIG. 8 is a graph showing sulfuric acid dew condensation intensity W 30 when operating at a load corresponding to a value of 30%, and FIG. 8 shows sulfuric acid dew condensation intensity W 90 when engine E is operated at a load corresponding to a load index value of 90%. It is a graph. 6 to 8, the X axis indicates the piston position in the cylinder, and the Y axis indicates the temperature.
　図６～図８において、グラフＤはシリンダ内におけるピストン位置に応じて変化するシリンダ内の硫酸の露点温度を示している。また、グラフＴはシリンダ内におけるピストン位置に応じて変化するシリンダライナの内側表面の温度を示している。 6 to 8, graph D shows the dew point temperature of sulfuric acid in the cylinder that changes according to the piston position in the cylinder. Graph T shows the temperature of the inner surface of the cylinder liner that changes according to the position of the piston in the cylinder.
　シリンダライナの低温腐食は、主としてシリンダライナの内側面に硫酸が結露することにより生じる。従って、シリンダライナの内側表面の温度がシリンダ内の硫酸の露点温度より高ければシリンダライナに硫酸は結露せず、シリンダライナの低温腐食はほどんど進行しない。一方、シリンダライナの内側表面の温度がシリンダ内の硫酸の露点温度より低ければシリンダライナに硫酸が結露し、シリンダライナの低温腐食が進行する。この場合、結露する硫酸の量が多い程、シリンダライナの低温腐食の進行が速まる。 低温 Low temperature corrosion of the cylinder liner is mainly caused by the condensation of sulfuric acid on the inner surface of the cylinder liner. Therefore, if the temperature of the inner surface of the cylinder liner is higher than the dew point temperature of sulfuric acid in the cylinder, sulfuric acid does not condense on the cylinder liner, and the low temperature corrosion of the cylinder liner hardly progresses. On the other hand, if the temperature of the inner surface of the cylinder liner is lower than the dew point temperature of sulfuric acid in the cylinder, sulfuric acid is condensed on the cylinder liner, and low temperature corrosion of the cylinder liner proceeds. In this case, the greater the amount of sulfuric acid that condenses, the faster the low temperature corrosion of the cylinder liner.
　従って、図６および図７においてシリンダライナの内側表面の温度を示すグラフＴが硫酸の露点温度を示すグラフＤより下方に位置する範囲内にピストンが位置するときに、シリンダライナに硫酸の結露が生じる。また、グラフＴがグラフＤより下方に位置する範囲内にピストンが位置するときにおいて、シリンダ内の硫酸濃度が同じであれば、グラフＴとグラフＤの乖離が大きい程、一般的に結露する硫酸の量も増加する。そのため、グラフＤとグラフＴの間に生じる領域の面積が大きい程、シリンダライナに対する硫酸の結露が生じやすいことになる。なお、図８においてはグラフＴがグラフＤより下方に位置する領域がないので、シリンダライナに硫酸の結露が生じることはない。 Accordingly, in FIGS. 6 and 7, when the piston is positioned within a range where the graph T indicating the temperature of the inner surface of the cylinder liner is located below the graph D indicating the dew point temperature of sulfuric acid, dew condensation of sulfuric acid occurs on the cylinder liner. Arise. Further, when the piston is located in a range where the graph T is located below the graph D, if the sulfuric acid concentration in the cylinder is the same, the greater the difference between the graph T and the graph D, the more generally the sulfuric acid that is condensed. The amount of increases. For this reason, the larger the area of the region generated between the graph D and the graph T, the more likely the condensation of sulfuric acid on the cylinder liner occurs. In FIG. 8, since there is no region where the graph T is located below the graph D, there is no condensation of sulfuric acid on the cylinder liner.
　硫酸結露強度は、シリンダ内における硫酸の結露の生じやすさを示す指標値であり、グラフＴとグラフＤの間の領域の面積として概念される。過給機の運転状態等の他の条件が同一であるならば、図６～図８に示されるように、硫酸結露強度は一般的にエンジンの負荷が小さい程、大きな値をとり、エンジンの負荷が或る値を超えると「０」となる場合が多い。ここで留意すべき点は、硫酸結露強度はグラフＴとグラフＤの形状および位置により定まり、燃料油に含まれる硫黄量やシリンダ潤滑油に含まれるカルシウム等の塩基性物質の量によって影響を受けることがない、という点である。 The sulfuric acid dew condensation strength is an index value indicating the ease of sulfuric acid dew condensation in the cylinder, and is conceptualized as the area of the region between the graph T and the graph D. If other conditions such as the operating state of the turbocharger are the same, as shown in FIGS. 6 to 8, the sulfuric acid dew condensation strength generally takes a larger value as the engine load is smaller. When the load exceeds a certain value, it often becomes “0”. It should be noted that the strength of sulfuric acid dew condensation is determined by the shape and position of graphs T and D, and is affected by the amount of basic substances such as sulfur contained in fuel oil and calcium contained in cylinder lubricating oil. There is nothing.
　グラフＴおよびグラフＤの形状および位置はエンジンの特性により定まる。グラフＴおよびグラフＤの形状および位置に影響を与えるエンジンの特性としては、ディレーティングマップの形状、シリンダライナ冷却水の設定温度、燃料消費率、Pmax（筒内最高燃焼圧力）、Pmax/Pme（筒内最高燃焼圧力と正味平均有効圧力の比率）、シリンダライナの壁温分布等が挙げられるが、これらに限られない。 The shape and position of graph T and graph D are determined by the engine characteristics. Engine characteristics that affect the shape and position of graph T and graph D include the shape of the derating map, the set temperature of the cylinder liner cooling water, the fuel consumption rate, Pmax (maximum combustion pressure in the cylinder), Pmax / Pme ( The ratio between the maximum in-cylinder combustion pressure and the net average effective pressure), the wall temperature distribution of the cylinder liner, and the like, but are not limited thereto.
　なお、図６～図８を用いて上述した説明は、あくまで硫酸結露強度の概念の説明である。従って、硫酸結露強度は、グラフＤ（シリンダ内におけるピストン位置に応じて変化するシリンダ内の硫酸の露点温度を示す曲線）と、グラフＴ（シリンダ内におけるピストン位置に応じて変化するシリンダライナの内側表面の温度を示す曲線）との間の領域の面積と正の相関を有していればよく、必ずしもその面積と一致しなくてもよい。 The description given above with reference to FIGS. 6 to 8 is merely an explanation of the concept of sulfuric acid dew condensation strength. Accordingly, the sulfuric acid dew condensation strength is represented by graph D (curve indicating the dew point temperature of sulfuric acid in the cylinder that changes according to the piston position in the cylinder) and graph T (inside of the cylinder liner that changes according to the piston position in the cylinder). It is only necessary to have a positive correlation with the area of the region between the curve and the surface temperature), and the area does not necessarily coincide with the area.
　続いて、硫酸結露強度の特定方法の一例を示す。今、エンジンＥに関し、或る期間内における負荷指標値と、当該期間内において単位時間当たり（例えば１日当たり）にシリンダに投入された硫黄の量と、当該期間内において単位時間当たり（例えば１日当たり）にシリンダに投入された塩基性物質の量と、当該期間内における低温腐食速度とを示すサンプルデータが多数、得られているものとする。なお、塩基性物質はシリンダ潤滑油等に含まれる中和剤の役割を果たす物質であり、例えばカルシウムを含むカルシウム系シリンダ潤滑油が用いられる場合、塩基性物質はカルシウムである。また、低温腐食速度としては、例えばシリンダドレン油に含まれる鉄分量の計測値に基づく推定値が用いられる。 Subsequently, an example of a method for specifying the sulfuric acid dew condensation strength will be shown. Now, regarding the engine E, the load index value within a certain period, the amount of sulfur introduced into the cylinder per unit time (for example, per day) within the period, and the unit time (for example, per day) within the period It is assumed that a lot of sample data indicating the amount of the basic substance put into the cylinder and the low temperature corrosion rate in the period is obtained. In addition, a basic substance is a substance which plays the role of the neutralizer contained in cylinder lubricating oil etc., for example, when a calcium-type cylinder lubricating oil containing calcium is used, a basic substance is calcium. As the low temperature corrosion rate, for example, an estimated value based on a measured value of the iron content contained in the cylinder drain oil is used.
　各サンプルデータが示すエンジンの負荷指標値をＬ、単位時間当たりの硫黄の投入量（以下、単に「硫黄量」という）をＳ、単位時間当たりの塩基性物質の投入量（以下、単に「塩基性物質量」という）をＣ、低温腐食速度をＣＩとし、硫黄量Ｓと塩基性物質量Ｃとにより定まるシリンダ内の硫酸濃度をＨとすると、硫酸結露強度ＷLは、例えば以下の式１に示される条件を満たす数値として定義される。ただし、ａは塩基性物質の中和能力に応じて定まる定数である。
Figure JPOXMLDOC01-appb-M000001
 The load index value of the engine indicated by each sample data is L, the input amount of sulfur per unit time (hereinafter simply referred to as “sulfur amount”) is S, and the input amount of basic substance per unit time (hereinafter simply referred to as “base”). a) that sex material amount "C, low-temperature corrosion rate and CI, when the sulfuric acid concentration in the cylinder defined by the amount of sulfur S and basic substance amount C and H, sulphate condensation intensity W L, for example the following formula 1 It is defined as a numerical value that satisfies the conditions shown in. However, a is a constant determined according to the neutralizing ability of the basic substance.
Figure JPOXMLDOC01-appb-M000001
　多数のサンプルデータが示すＬ、Ｓ、Ｃ、ＣＩの組み合わせに関し、式１に従い最も当てはまりのよいＷLが負荷指標値Ｌに応じた硫酸結露強度として特定される。 Numerous sample data indicates L, S, C, relates to the combination of CI, good W L most true according to Equation 1 is identified as a sulfated condensation intensity corresponding to the load index value L.
　なお、式１は硫酸結露強度の算出方法の一例であって、より当てはまりのよい硫酸結露強度を導出可能な式が式１に代えて採用されてもよい。また、算出式によらず、例えば船舶８の管理会社の職員等がエンジンの特性に基づき推定した値が硫酸結露強度として用いられてもよい。以上が硫酸結露強度の説明である。 In addition, Formula 1 is an example of a method for calculating sulfate condensation strength, and a formula that can derive a more applicable sulfate condensation strength may be used instead of Formula 1. Further, a value estimated by, for example, a staff of a management company of the ship 8 based on engine characteristics may be used as the sulfuric acid dew condensation strength, regardless of the calculation formula. The above is an explanation of sulfuric acid dew condensation strength.
　図４に戻り端末装置１１の機能構成部の説明を続ける。負荷指標値取得手段１１２は、例えばエンジンの制御装置から負荷指標値を取得する。負荷指標値としては、例えば軸馬力計により計測された値が用いられる。これに代えて、例えば燃料消費量、船速、プロペラ回転数、プロペラのトルク、掃気圧力、過給機回転数等から推定された負荷指標値が用いられてもよい。負荷指標値取得手段１１２が取得する負荷指標値は、通常、計測されて間もない負荷指標値であり、実質的に取得時におけるエンジンの負荷の大小を示す。 Returning to FIG. 4, the description of the functional components of the terminal device 11 will be continued. The load index value acquisition unit 112 acquires a load index value from, for example, an engine control device. As the load index value, for example, a value measured by a shaft horsepower meter is used. Instead of this, for example, a load index value estimated from fuel consumption, ship speed, propeller rotation speed, propeller torque, scavenging pressure, turbocharger rotation speed, and the like may be used. The load index value acquired by the load index value acquiring unit 112 is usually a load index value that has just been measured, and substantially indicates the magnitude of the engine load at the time of acquisition.
　属性値取得手段１１３は、シリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値を取得する。属性値取得手段１１３が取得する属性値は、通常、計測されて間もない属性値であり、実質的に取得時におけるシリンダ内の硫酸濃度または当該硫酸濃度を左右する属性値である。属性値取得手段１１３が取得する属性値の種別としては、シリンダに投入される硫黄量、シリンダに投入される塩基性物質の量、外気温度等が挙げられる。また、属性値取得手段１１３は、これら取得した硫黄量等に基づき特定された硫酸濃度を属性値として取得してもよい。 The attribute value acquisition unit 113 acquires an attribute value that is at least one value of the sulfuric acid concentration in the cylinder or an attribute that affects the sulfuric acid concentration. The attribute value acquired by the attribute value acquisition unit 113 is usually an attribute value that has just been measured, and is substantially the sulfuric acid concentration in the cylinder at the time of acquisition or an attribute value that affects the sulfuric acid concentration. The types of attribute values acquired by the attribute value acquisition unit 113 include the amount of sulfur input to the cylinder, the amount of basic substance input to the cylinder, the outside air temperature, and the like. Further, the attribute value acquisition unit 113 may acquire the sulfuric acid concentration specified based on the acquired sulfur amount or the like as the attribute value.
　船舶用のエンジンには、カルシウム系添加剤が添加されたシリンダ潤滑油が広く用いられている。カルシウム系添加剤が添加されたシリンダ潤滑油が用いられる場合、属性値取得手段１１３は属性値の１つとして、シリンダに投入されたカルシウム量を塩基性物質の量として取得する。塩基性物質としてマグネシウム、バリウム等のカルシウム以外の物質を含む添加剤が添加されているシリンダ潤滑油が用いられる場合、属性値取得手段１１３はカルシウムに代えて、マグネシウム、バリウム等の量を属性値の１つとして取得してもよい。以下の説明において、船舶８のエンジンにはカルシウム系添加剤の添加されたシリンダ潤滑油が用いられ、属性値取得手段１１３は属性値の１つとしてシリンダに投入されたカルシウム量を取得するものとする。 For cylinder engines, cylinder lubricants with added calcium-based additives are widely used. When the cylinder lubricant to which the calcium-based additive is added is used, the attribute value acquisition unit 113 acquires the amount of calcium charged into the cylinder as the amount of the basic substance as one of the attribute values. When cylinder lubricating oil to which an additive containing a substance other than calcium such as magnesium or barium is used as a basic substance is used, the attribute value acquisition means 113 replaces calcium with an amount of magnesium, barium, or the like as an attribute value. You may acquire as one of these. In the following description, a cylinder lubricant to which a calcium-based additive is added is used for the engine of the ship 8, and the attribute value acquisition unit 113 acquires the amount of calcium charged into the cylinder as one of the attribute values. To do.
　属性値取得手段１１３は、例えば、燃料油の硫黄含有率を記憶装置から読み出すとともに流量計から燃料油の単位時間当たりの流量を受け取り、燃料油の流量に硫黄含有率を乗じてシリンダに単位時間あたりに投入された硫黄量を特定する。また、属性値取得手段１１３は、例えば、シリンダ潤滑油のカルシウムの含有率を記憶装置から読み出すとともに流量計からシリンダ潤滑油の単位時間当たりの流量を受け取り、シリンダ潤滑油の流量にカルシウムの含有率を乗じてシリンダに単位時間当たりに投入されたカルシウム量を特定する。 For example, the attribute value acquisition unit 113 reads out the sulfur content rate of the fuel oil from the storage device, receives the flow rate per unit time of the fuel oil from the flow meter, multiplies the flow rate of the fuel oil by the sulfur content rate, and unitizes the cylinder per unit time. Identify the amount of sulfur introduced per unit. The attribute value acquisition unit 113 reads, for example, the calcium content of the cylinder lubricant from the storage device, receives the flow rate per unit time of the cylinder lubricant from the flow meter, and includes the calcium content in the flow rate of the cylinder lubricant. To identify the amount of calcium charged into the cylinder per unit time.
　記憶手段１１４は各種データを記憶する。記憶手段１１４が記憶するデータとしては、例えば、硫酸結露強度取得手段１１１により取得された硫酸結露強度テーブル（図５）、負荷指標値取得手段１１２により取得された負荷指標値、属性値取得手段１１３により取得された属性値、後述する低温腐食速度特定手段１１５により特定された低温腐食速度、後述する摩耗量特定手段１１６により特定された期間内摩耗量および累積摩耗量等が挙げられる。 Storage unit 114 stores various data. The data stored in the storage unit 114 includes, for example, a sulfuric acid condensation strength table acquired by the sulfuric acid condensation strength acquisition unit 111 (FIG. 5), a load index value acquired by the load index value acquisition unit 112, and an attribute value acquisition unit 113. , The low temperature corrosion rate specified by the low temperature corrosion rate specifying means 115 described later, the in-period wear amount specified by the wear amount specifying means 116 described later, the cumulative wear amount, and the like.
　図９は、記憶手段１１４が負荷指標値取得手段１１２、属性値取得手段１１３、低温腐食速度特定手段１１５、および摩耗量特定手段１１６から受け取る各種データを格納するために用いるテーブル（以下、「摩耗量管理テーブル」という）のデータ構成を例示した図である。摩耗量管理テーブルは、例えば所定時間長の期間毎のレコードの集まりであり、対応する期間の順にレコードが並んでいる。摩耗量管理テーブルは、データフィールドとして［期間］、［負荷指標値］、［属性値１］、「属性値２］、・・・、［属性値ｎ］（ただし、ｎは属性値取得手段１１３が取得する属性値の種別の数）、［低温腐食速度］、［期間内摩耗量］、［累積摩耗量］を有している。なお、各レコードに応じた期間の時間長は、負荷指標値や属性値が大きく変化しない程度の時間長であれば、いずれの時間長であってもよい。また、各レコードに応じた期間の時間長はレコード毎に異なってもよい。 FIG. 9 shows a table used by the storage unit 114 to store various data received from the load index value acquisition unit 112, the attribute value acquisition unit 113, the low temperature corrosion rate identification unit 115, and the wear amount identification unit 116 (hereinafter referred to as “wear”). It is the figure which illustrated the data structure of "quantity management table". The wear amount management table is a collection of records for each period of a predetermined time length, for example, and the records are arranged in the order of the corresponding periods. In the wear amount management table, [period], [load index value], [attribute value 1], “attribute value 2”,..., [Attribute value n] (where n is attribute value acquisition means 113). The number of attribute value types acquired by, and [Low-temperature corrosion rate], [Amount of wear during period], and [Cumulative wear quantity] The time length of the period corresponding to each record is the load index. Any time length may be used as long as the value or attribute value does not change significantly, and the time length of the period corresponding to each record may be different for each record.
　記憶手段１１４は、各レコードに応じた期間内に負荷指標値取得手段１１２または属性値取得手段１１３からデータを受け取った場合は、当該データを対応するフィールド、すなわち［負荷指標値］または［属性値１］、「属性値２］、・・・、［属性値ｎ］に格納する。その際、既に格納先のフィールドにデータが格納されている場合、記憶手段１１４は例えば新しいデータで古いデータを上書きする。 When the storage unit 114 receives data from the load index value acquisition unit 112 or the attribute value acquisition unit 113 within a period corresponding to each record, the storage unit 114 stores the data in a corresponding field, that is, [load index value] or [attribute value]. 1], “attribute value 2”,..., [Attribute value n]. At this time, when data is already stored in the storage destination field, the storage means 114 stores old data with new data, for example. Overwrite.
　また、記憶手段１１４は、各レコードに応じた期間内に負荷指標値取得手段１１２または属性値取得手段１１３からデータを受け取らなかった場合は、先行するレコードのデータを現在のレコードの同じフィールド（データが得られなかったフィールド）にコピーした後、新たな期間に応じたレコードを摩耗量管理テーブルに追加する。 Further, if the storage unit 114 does not receive data from the load index value acquisition unit 112 or the attribute value acquisition unit 113 within a period corresponding to each record, the storage unit 114 sets the data of the preceding record to the same field (data After that, a record corresponding to a new period is added to the wear amount management table.
　その結果、摩耗量管理テーブルには、各期間におけるシリンダ内の硫酸濃度に影響を与える属性値（シリンダに投入された硫黄量、シリンダに投入されたカルシウム量等）と、エンジンの負荷の大小を示す負荷指標値とが対応付けて記憶される。 As a result, the wear amount management table includes attribute values that affect the sulfuric acid concentration in the cylinder in each period (the amount of sulfur introduced into the cylinder, the amount of calcium introduced into the cylinder, etc.) and the magnitude of the engine load. The load index value shown is stored in association with each other.
　摩耗量管理テーブルのフィールド［低温腐食速度］、［期間内摩耗量］および［累積摩耗量］に格納されるデータについては、低温腐食速度特定手段１１５および摩耗量特定手段１１６の説明において併せて説明する。 The data stored in the fields [low temperature corrosion rate], [in-period wear amount] and [cumulative wear amount] of the wear amount management table will be described together in the description of the low temperature corrosion rate specifying means 115 and the wear amount specifying means 116. To do.
　図４に戻り端末装置１１の機能構成部の説明を続ける。低温腐食速度特定手段１１５は、硫酸結露強度テーブル（図５）に格納される硫酸結露強度のうち負荷指標値取得手段１１２により取得された負荷指標値に応じた硫酸結露強度と、属性値取得手段１１３により取得された属性値とに基づき、シリンダライナの低温腐食速度を特定する。 Returning to FIG. 4, the description of the functional components of the terminal device 11 will be continued. The low temperature corrosion rate specifying means 115 includes sulfuric acid condensation intensity according to the load index value acquired by the load index value acquisition means 112 among the sulfuric acid condensation intensity stored in the sulfuric acid condensation intensity table (FIG. 5), and attribute value acquisition means. Based on the attribute value acquired in step 113, the low temperature corrosion rate of the cylinder liner is specified.
　具体的には、低温腐食速度特定手段１１５は、摩耗量管理テーブル（図９）のレコードの各々に関し、まず対象レコードの［負荷指標値］に格納されるデータが示す負荷指標値Ｌに応じた硫酸結露強度ＷLを硫酸結露強度テーブル（図５）から読み出す。続いて、低温腐食速度特定手段１１５は、読み出した硫酸結露強度ＷLと、対象レコードの［属性値１］、「属性値２］、・・・、［属性値ｎ］に格納されている属性値Ａ1、Ａ2、・・・、Ａnとに基づき、予め定められている算出式に従い、対象レコードに応じた期間におけるシリンダライナの低温腐食速度ＣＩを算出する。 Specifically, the low temperature corrosion rate specifying means 115 first responds to the load index value L indicated by the data stored in the [load index value] of the target record for each of the records of the wear amount management table (FIG. 9). reading the sulfuric acid dew intensity W L sulfuric acid condensation intensity table (FIG. 5). Subsequently, the low-temperature corrosion rate specifying unit 115, the read and sulfuric acid dew strength W L, of the target record Attribute Value 1], "attribute value 2, ..., attributes stored in the attribute value n] value a 1, a 2, · · ·, based on the a n, in accordance with calculation formula is determined in advance, to calculate the low-temperature corrosion rate CI of the cylinder liner in the period corresponding to the target record.
　上述した式１は、変数として硫黄量Ｓと塩基性物質量Ｃの２つの種別の属性値が用いられる場合に、低温腐食速度特定手段１１５が低温腐食速度ＣＩを算出するために用いる算出式の一例である。低温腐食速度特定手段１１５が低温腐食速度ＣＩを算出するために用いる算出式は、以下の式２のように一般化される。
Figure JPOXMLDOC01-appb-M000002
 Equation 1 described above is a calculation equation used by the low temperature corrosion rate specifying means 115 to calculate the low temperature corrosion rate CI when two types of attribute values of the sulfur amount S and the basic substance amount C are used as variables. It is an example. The calculation formula used by the low temperature corrosion rate specifying means 115 to calculate the low temperature corrosion rate CI is generalized as the following formula 2.
Figure JPOXMLDOC01-appb-M000002
　式２に示される算出式は、例えば、予めサーバ装置１２において生成され、受信手段１１８がサーバ装置１２から受信し記憶手段１１４に記憶している。低温腐食速度特定手段１１５は記憶手段１１４から式２に示される算出式を読み出して用いる。低温腐食速度特定手段１１５は、算出した低温腐食速度ＣＩを摩耗量管理テーブル（図９）の対象レコードの［低温腐食速度］に格納する。 The calculation formula shown in Expression 2 is generated in advance in the server device 12, for example, and is received by the receiving unit 118 from the server device 12 and stored in the storage unit 114. The low temperature corrosion rate specifying means 115 reads out and uses the calculation formula shown in Expression 2 from the storage means 114. The low temperature corrosion rate specifying means 115 stores the calculated low temperature corrosion rate CI in [Low temperature corrosion rate] of the target record of the wear amount management table (FIG. 9).
　式２に示される算出式はエンジンの負荷が異なっても共通に使用されるが、負荷毎に異なる硫酸結露強度が用いられる。従って、式２に従い算出される低温腐食速度ＣＩは、仮に属性値が同じであっても、負荷に応じて異なる値となる。また、式２に示される算出式は異なる特性のエンジンにも共通に使用されるが、特性が異なるエンジン毎に異なる硫酸結露強度が用いられるため、式２に従い算出される低温腐食速度は、仮に属性値と負荷指標値が同じであっても、エンジンの特性に応じて異なる値となる。 The calculation formula shown in Equation 2 is commonly used even when the engine load is different, but different sulfuric acid condensation strength is used for each load. Therefore, even if the attribute value is the same, the low temperature corrosion rate CI calculated according to Equation 2 becomes a different value depending on the load. The calculation formula shown in Formula 2 is commonly used for engines having different characteristics. However, since different sulfuric acid condensation strength is used for each engine having different characteristics, the low-temperature corrosion rate calculated according to Formula 2 is temporarily Even if the attribute value and the load index value are the same, the value varies depending on the engine characteristics.
　摩耗量特定手段１１６は低温腐食速度特定手段１１５により特定された低温腐食速度に基づき、期間内のシリンダライナの摩耗量（以下、「期間内摩耗量」という）を特定する。 The wear amount specifying means 116 specifies the wear amount of the cylinder liner within the period (hereinafter referred to as “amount of wear within the period”) based on the low temperature corrosion rate specified by the low temperature corrosion rate specifying means 115.
　摩耗量特定手段１１６は、具体的には、摩耗量管理テーブル（図９）のレコードの各々に関し、対象レコードの［低温腐食速度］に格納されている低温腐食速度に対象レコードの［期間］が示す期間の時間長を乗じて、当該期間内に進行したシリンダライナの低温腐食の量（以下、「期間内低温腐食量」という）を算出し、算出した期間内低温腐食量に応じたシリンダライナの期間内摩耗量を、予め定められた算出式に従い算出する。摩耗量特定手段１１６が期間内摩耗量の算出に用いる算出式は、例えば、予めサーバ装置１２において生成され、受信手段１１８がサーバ装置１２から受信し記憶手段１１４に記憶している。摩耗量特定手段１１６は記憶手段１１４から当該算出式を読み出して用いる。 Specifically, the wear amount specifying means 116 sets the [period] of the target record to the low temperature corrosion rate stored in the [low temperature corrosion rate] of the target record for each record of the wear amount management table (FIG. 9). The amount of low-temperature corrosion of the cylinder liner that has progressed within that period (hereinafter referred to as “low-temperature corrosion amount within the period”) is calculated by multiplying the length of the indicated period, and the cylinder liner corresponding to the calculated low-temperature corrosion amount within the period Is calculated according to a predetermined calculation formula. The calculation formula used by the wear amount specifying unit 116 to calculate the wear amount within the period is, for example, generated in advance in the server device 12, received by the receiving unit 118 from the server device 12, and stored in the storage unit 114. The wear amount specifying means 116 reads out the calculation formula from the storage means 114 and uses it.
　摩耗量特定手段１１６が期間内摩耗量の算出に用いる算出式は、期間内低温腐食量のみを変数とする関数式であってもよいし、期間内低温腐食量に加え、例えば期間内のエンジンの回転数、期間内にシリンダに投入されたシリンダ潤滑油の量、対象レコードの１つ前のレコードの［累積摩耗量］の値等のパラメータを変数とする関数式であってもよい。なお、摩耗量特定手段１１６が期間内摩耗量の算出に用いる算出式はピストンおよびシリンダライナの特性等に応じて異なる。 The calculation formula used by the wear amount specifying means 116 for calculating the wear amount within the period may be a function equation having only the low temperature corrosion amount within the period as a variable, or in addition to the low temperature corrosion amount within the period, for example, an engine within the period. May be a function expression having parameters such as the number of rotations, the amount of cylinder lubricant injected into the cylinder within the period, and the value of [cumulative wear amount] of the record immediately before the target record. The calculation formula used by the wear amount specifying means 116 for calculating the wear amount within the period varies depending on the characteristics of the piston and the cylinder liner.
　摩耗量特定手段１１６は、算出した期間内摩耗量を摩耗量管理テーブル（図９）の対象レコードの［期間内摩耗量］に格納する。また、摩耗量特定手段１１６は、対象レコードの［期間内摩耗量］の値を、１つ前のレコードの［累積摩耗量］の値に加算して得られる値を、対象レコードの［累積摩耗量］に格納する。なお、シリンダライナの交換直後の期間に応じたレコードの［累積摩耗量］には「０」が格納される。従って、摩耗量管理テーブルの［累積摩耗量］には、シリンダライナが交換時から各期間の終了タイミングまでの期間において摩耗した量が格納されることになる。 The wear amount specifying means 116 stores the calculated wear amount within the period in [Wear amount within period] of the target record of the wear amount management table (FIG. 9). Further, the wear amount specifying means 116 adds the value obtained by adding the [in-period wear amount] value of the target record to the [cumulative wear amount] value of the previous record, Store in the Quantity. Note that “0” is stored in [cumulative wear amount] of the record corresponding to the period immediately after replacement of the cylinder liner. Therefore, the amount of wear during the period from the time of replacement of the cylinder liner to the end timing of each period is stored in [cumulative wear amount] of the wear amount management table.
　送信手段１１７はサーバ装置１２に各種データを送信する。例えば、送信手段１１７は摩耗量管理テーブル（図９）に格納されるデータをサーバ装置１２に送信する。受信手段１１８はサーバ装置１２から各種データを受信する。以上が端末装置１１の機能構成部の説明である。 The transmission unit 117 transmits various data to the server device 12. For example, the transmission unit 117 transmits data stored in the wear amount management table (FIG. 9) to the server device 12. The receiving unit 118 receives various data from the server device 12. The above is the description of the functional configuration unit of the terminal device 11.
　図１０は、サーバ装置１２の機能構成を示した図である。すなわち、コンピュータ２０は、サーバ装置１２用のプログラムに従うデータ処理を実行することにより、図１０に示す構成を備える装置として動作する。以下に図１０に示されるサーバ装置１２の機能構成部を説明する。 FIG. 10 is a diagram showing a functional configuration of the server device 12. That is, the computer 20 operates as a device having the configuration shown in FIG. 10 by executing data processing according to the program for the server device 12. Hereinafter, a functional configuration unit of the server apparatus 12 illustrated in FIG. 10 will be described.
　サンプルデータ取得手段１２１は様々なエンジンの各々に関し、或る期間内における負荷指標値と、当該期間内におけるシリンダ内の硫酸濃度に影響を与える１以上の種別の属性値と、当該期間内におけるシリンダライナの低温腐食速度とを示すサンプルデータを複数取得する。サンプルデータ取得手段１２１により取得されたサンプルデータは、記憶手段１２２に記憶される。 The sample data acquisition unit 121 relates to each of various engines, a load index value within a certain period, one or more types of attribute values that affect the sulfuric acid concentration in the cylinder within the period, and a cylinder within the period. Obtain multiple sample data indicating the low temperature corrosion rate of the liner. The sample data acquired by the sample data acquisition unit 121 is stored in the storage unit 122.
　図１１は、サンプルデータ取得手段１２１が取得したサンプルデータが格納されるテーブル（以下、「低温腐食速度サンプルテーブル」という）のデータ構成を例示した図である。低温腐食速度サンプルテーブルは、フィールドとして［エンジンＩＤ］、［期間］、［負荷指標値］、［属性値１］、「属性値２］、・・・、［属性値ｎ］、［低温腐食速度］を有する。［エンジンＩＤ］にはエンジンの識別子が格納される。［期間］～［属性値ｎ］には、摩耗量管理テーブル（図９）の同名のフィールドに格納されるデータと同種のデータが格納される。［低温腐食速度］には、シリンダライナの低温腐食速度が格納される。 FIG. 11 is a diagram illustrating a data configuration of a table (hereinafter referred to as “low temperature corrosion rate sample table”) in which sample data acquired by the sample data acquiring unit 121 is stored. The low-temperature corrosion rate sample table includes [engine ID], [period], [load index value], [attribute value 1], “attribute value 2”,..., [Attribute value n], [low-temperature corrosion rate] as fields. [Engine ID] stores an engine identifier, [Period] to [Attribute Value n] have the same type as the data stored in the field of the same name in the wear amount management table (FIG. 9). Data is stored in [Cold Corrosion Rate], which stores the low temperature corrosion rate of the cylinder liner.
　低温腐食速度サンプルテーブルの［低温腐食速度］に格納される値は、例えばシリンダドレン油の含有鉄分分析の結果に基づき推定された値である。 The value stored in [Low Temperature Corrosion Rate] in the Low Temperature Corrosion Rate Sample Table is a value estimated based on, for example, the analysis result of iron contained in the cylinder drain oil.
　図１０に戻りサーバ装置１２の機能構成部の説明を続ける。記憶手段１２２は、上述した低温腐食速度サンプルテーブルに加え、様々なエンジンに応じた硫酸結露強度テーブル（図５）等の各種データを記憶する。 Returning to FIG. 10, the description of the functional components of the server device 12 is continued. The storage means 122 stores various data such as a sulfuric acid condensation strength table (FIG. 5) corresponding to various engines, in addition to the above-described low temperature corrosion rate sample table.
　硫酸結露強度特定手段１２３は、低温腐食速度サンプルテーブル（図１１）に格納されているサンプルデータに基づき、様々なエンジンに関し、負荷指標値に応じた硫酸結露強度を特定する。 The sulfuric acid dew condensation strength specifying means 123 specifies the sulfuric acid dew condensation strength according to the load index value for various engines based on the sample data stored in the low temperature corrosion rate sample table (FIG. 11).
　例えば低温腐食速度サンプルテーブルの［属性値１］に対象期間内において単位時間当たりにシリンダに投入された硫黄量Ｓが格納され、［属性値２］に対象期間内において単位時間当たりにシリンダに投入された塩基性物質量Ｃが格納されている場合、硫酸結露強度特定手段１２３は硫黄量Ｓ、塩基性物質量Ｃ、および［低温腐食速度］に格納されている低温腐食速度ＣＩに基づき、例えば上述した式１に従い、負荷指標値Ｌに応じた硫酸結露強度ＷLを特定する。 For example, in the low temperature corrosion rate sample table, [attribute value 1] stores the sulfur amount S input to the cylinder per unit time within the target period, and [attribute value 2] inputs to the cylinder per unit time within the target period. When the basic substance amount C stored is stored, the sulfuric acid dew condensation strength specifying means 123 is based on the sulfur amount S, the basic substance amount C, and the low temperature corrosion rate CI stored in [low temperature corrosion rate], for example. The sulfuric acid dew condensation strength WL corresponding to the load index value L is specified according to the above-described formula 1.
　硫酸結露強度特定手段１２３により特定された硫酸結露強度ＷLは、対象のエンジンのエンジンＩＤに応じた硫酸結露強度テーブルに格納された状態で記憶手段１２２に記憶される。 The sulfuric acid condensation intensity W L specified by the sulfuric acid condensation intensity specifying means 123 is stored in the storage means 122 in a state of being stored in a sulfuric acid condensation intensity table corresponding to the engine ID of the target engine.
　受信手段１２４は、端末装置１１および端末装置１３から各種データを受信する。また、送信手段１２５は、端末装置１１および端末装置１３に各種データを送信する。例えば、受信手段１２４は端末装置１１から硫酸結露強度テーブルの要求を受信する。当該要求には、端末装置１１が搭載されている船舶８のエンジンを識別するエンジンＩＤが含まれている。送信手段１２５は受信手段１２４が受信した要求に含まれるエンジンＩＤに応じた硫酸結露強度テーブルを記憶手段１２２から読み出し、要求元の端末装置１１に送信する。 The receiving unit 124 receives various data from the terminal device 11 and the terminal device 13. The transmission means 125 transmits various data to the terminal device 11 and the terminal device 13. For example, the receiving unit 124 receives a request for a sulfuric acid condensation strength table from the terminal device 11. The request includes an engine ID for identifying the engine of the ship 8 on which the terminal device 11 is mounted. The transmission unit 125 reads out from the storage unit 122 a sulfuric acid dew condensation intensity table corresponding to the engine ID included in the request received by the reception unit 124, and transmits it to the requesting terminal device 11.
　また、受信手段１２４は、様々な船舶８に搭載された端末装置１１の各々から送信されてくる摩耗量管理テーブル（図９）のレコードを、端末装置１１が搭載されている船舶８のエンジンを識別するエンジンＩＤとともに受信する。記憶手段１２２には、エンジンＩＤの各々に応じて、端末装置１１の記憶手段１１４に記憶される摩耗量管理テーブルのコピーが記憶されている。受信手段１２４により端末装置１１から受信された摩耗量管理テーブルのレコードは、記憶手段１２２において、当該レコードと共に受信されたエンジンＩＤに応じた摩耗量管理テーブルに順次追加される。 The receiving means 124 records the records of the wear amount management table (FIG. 9) transmitted from each of the terminal devices 11 mounted on various ships 8 and displays the engine of the ship 8 on which the terminal devices 11 are mounted. Received together with the identifying engine ID. The storage unit 122 stores a copy of the wear amount management table stored in the storage unit 114 of the terminal device 11 according to each engine ID. The records of the wear amount management table received from the terminal device 11 by the receiving unit 124 are sequentially added to the wear amount management table corresponding to the engine ID received together with the record in the storage unit 122.
　また、受信手段１２４は、端末装置１３からデータ閲覧の要求を受信する。当該要求には、例えば船舶８の管理会社の職員等が累積摩耗量等を知りたい船舶８のエンジンのエンジンＩＤが含まれている。送信手段１２５は受信手段１２４が受信した要求に含まれるエンジンＩＤに応じた摩耗量管理テーブルから累積摩耗量等のデータを読み出し、要求元の端末装置１３に送信する。以上がサーバ装置１２の機能構成部の説明である。 Further, the receiving means 124 receives a data browsing request from the terminal device 13. The request includes, for example, the engine ID of the engine of the ship 8 for which the staff of the management company of the ship 8 wants to know the accumulated wear amount and the like. The transmission unit 125 reads data such as the accumulated wear amount from the wear amount management table corresponding to the engine ID included in the request received by the reception unit 124 and transmits the data to the requesting terminal device 13. The above is the description of the functional configuration unit of the server device 12.
　端末装置１３は、ユーザの操作に応じてサーバ装置１２にアクセスし、サーバ装置１２から取得したデータを表示等する一般的な端末装置である。従って、端末装置１３の機能構成の説明を省略する。 The terminal device 13 is a general terminal device that accesses the server device 12 in accordance with a user operation and displays data acquired from the server device 12. Therefore, description of the functional configuration of the terminal device 13 is omitted.
　端末装置１１の記憶手段１１４に記憶されている摩耗量管理テーブル（図９）には、端末装置１１が搭載されている船舶８のエンジンのシリンダライナの低温腐食速度、期間内摩耗量、累積摩耗量が継続的に格納されていく。また、サーバ装置１２の記憶手段１２２には、様々な船舶のエンジンに関し、当該エンジンのシリンダライナの低温腐食速度、期間内摩耗量、累積摩耗量が継続的に蓄積されていく。 The wear amount management table (FIG. 9) stored in the storage means 114 of the terminal device 11 includes the low temperature corrosion rate, the wear amount within the period, and the cumulative wear of the cylinder liner of the engine of the ship 8 on which the terminal device 11 is mounted. The quantity is stored continuously. Further, the storage means 122 of the server device 12 continuously accumulates the low temperature corrosion rate, the wear amount within the period, and the accumulated wear amount of the cylinder liner of the engine regarding various ship engines.
　端末装置１１は、船舶８の乗組員等の操作に応じて、摩耗量管理テーブル（図９）に格納されているデータに従い、船舶８のシリンダライナの低温腐食および摩耗の状態を表示する。また、端末装置１３は、船舶の管理会社の職員等の操作に応じてサーバ装置１２にアクセスし、指定された船舶のエンジンに応じた摩耗量管理テーブルに格納されているデータに従い、指定された船舶のシリンダライナの低温腐食および摩耗の状態を表示する。 The terminal device 11 displays the low temperature corrosion and wear state of the cylinder liner of the ship 8 according to the data stored in the wear amount management table (FIG. 9) according to the operation of the crew of the ship 8 and the like. Further, the terminal device 13 accesses the server device 12 according to the operation of the staff of the ship management company, etc., and is designated according to the data stored in the wear amount management table corresponding to the designated ship engine. Displays the cold corrosion and wear status of the ship's cylinder liner.
　図１２は、端末装置１１または端末装置１３がユーザの操作に応じて表示する摩耗量管理画面を例示した図である。摩耗量管理画面には、船舶名、エンジンＩＤ、最終シリンダライナ交換日が表示される。なお、最終シリンダライナ交換日は、最後に累積摩耗量が「０」であった期間の開始タイミングの属する日である。 FIG. 12 is a diagram exemplifying a wear amount management screen displayed by the terminal device 11 or the terminal device 13 in accordance with a user operation. On the wear amount management screen, the ship name, the engine ID, and the last cylinder liner replacement date are displayed. The last cylinder liner replacement date is the date to which the start timing of the period in which the cumulative wear amount was “0” lastly.
　また、摩耗量管理画面には、現在の低温腐食速度と、現在の摩耗速度が表示される。なお、現在の低温腐食速度は、最新のレコードにより示される低温腐食速度である。また、現在の摩耗速度は、最新のレコードにより示される期間内摩耗量を期間の時間長で除して算出される。 Also, the current low-temperature corrosion rate and the current wear rate are displayed on the wear amount management screen. The current low temperature corrosion rate is the low temperature corrosion rate indicated by the latest record. The current wear rate is calculated by dividing the amount of wear within the period indicated by the latest record by the time length of the period.
　現在の低温腐食速度が予め定められた閾値を超えると、摩耗量管理画面には、例えば「低温腐食が急速に進行しています。燃料油種の変更、シリンダ潤滑油の増量、船速の変更等をご検討下さい。」といったメッセージが表示される。また、現在の低温腐食速度が閾値以下の状態で現在の摩耗速度が予め定められた閾値を超えると、摩耗量管理画面には、例えば「摩耗が急速に進行しています。シリンダ潤滑油の増量等をご検討下さい。」といったメッセージが表示される。 When the current low-temperature corrosion rate exceeds a predetermined threshold, the wear amount management screen displays, for example, “Low-temperature corrosion is progressing rapidly. Change of fuel oil type, increase of cylinder lubricant, change of ship speed. Please consider. "Is displayed. If the current wear rate exceeds a predetermined threshold when the current low-temperature corrosion rate is less than or equal to the threshold value, the wear amount management screen displays, for example, “Wear is progressing rapidly. Please consider. "Is displayed.
　また、摩耗量管理画面には、累積摩耗量の推移が、例えばグラフで表示される。摩耗量管理画面に表示されるグラフには、過去の実績と同様のペースで摩耗が進行したと仮定した場合に累積摩耗量が限界値に達すると推定される日が示される。 Also, on the wear amount management screen, the transition of the accumulated wear amount is displayed, for example, in a graph. The graph displayed on the wear amount management screen shows the date on which the cumulative wear amount is estimated to reach the limit value when it is assumed that the wear has progressed at the same pace as the past results.
　船舶８の乗組員、船舶８の管理会社の職員等は、摩耗量管理画面を見ることで、シリンダライナの低温腐食および摩耗の状態をリアルタイムに知ることができる。 The crew of the ship 8 and the staff of the management company of the ship 8 can know the low temperature corrosion and wear state of the cylinder liner in real time by looking at the wear amount management screen.
［変形例］
　上述した実施形態は、本発明の技術的思想の範囲内で様々に変形することができる。以下にそれらの変形の例を示す。なお、以下の２以上の変形例が組み合わされてもよい。 [Modification]
The above-described embodiments can be variously modified within the scope of the technical idea of the present invention. Examples of these modifications are shown below. The following two or more modified examples may be combined.
（１）上述した実施形態において、摩耗量特定システム１は過去または現在におけるシリンダライナの低温腐食および摩耗の状態を特定する。これに代えて、もしくは加えて、摩耗量特定システム１が将来におけるシリンダライナの低温腐食および摩耗の状態を特定する構成が採用されてもよい。 (1) In the above-described embodiment, the wear amount specifying system 1 specifies the past or present low-temperature corrosion and wear state of the cylinder liner. Instead of this, or in addition, a configuration in which the wear amount specifying system 1 specifies the state of low temperature corrosion and wear of the cylinder liner in the future may be employed.
　この変形例において、例えば端末装置１１は、将来における船舶８の航行スケジュール、使用予定の燃料油の油種、使用予定のシリンダ潤滑油の量等を示すデータを取得し記憶する。なお、船舶８の航行スケジュール等のデータは、例えば船舶８の乗組員等により端末装置１１に対し入力されてもよいし、端末装置１１がサーバ装置１２から受信してもよい。端末装置１１は、船舶８の航行スケジュール等のデータに基づき、船舶８の将来の航行におけるエンジンの負荷指標値、使用される燃料油に含まれる硫黄量、使用されるシリンダ潤滑油に含まれる塩基性物質量等を特定し、特定したこれらのデータに基づき、低温腐食速度、期間内摩耗量および累積摩耗量を特定する。端末装置１１は特定したこれらの情報を、例えば船舶８の乗組員等に表示する。 In this modified example, for example, the terminal device 11 acquires and stores data indicating the navigation schedule of the ship 8 in the future, the type of fuel oil to be used, the amount of cylinder lubricant to be used, and the like. Note that data such as the navigation schedule of the ship 8 may be input to the terminal device 11 by a crew of the ship 8, for example, or the terminal device 11 may receive from the server device 12. The terminal device 11 is based on data such as the navigation schedule of the ship 8, the engine load index value in the future navigation of the ship 8, the amount of sulfur contained in the fuel oil used, and the base contained in the cylinder lubricant used. The amount of the toxic substance is specified, and the low temperature corrosion rate, the wear amount within the period, and the cumulative wear amount are specified based on the specified data. The terminal device 11 displays the specified information on, for example, a crew member of the ship 8.
　また、端末装置１１が、上記のように特定した累積摩耗量が予め定められた条件を満たす時期を船舶８の乗組員等に通知してもよい。例えば、端末装置１１は、累積摩耗量が所定の閾値に達する時期を特定し、特定した時期をシリンダライナの交換時期として船舶８の乗組員等に通知する。 Further, the terminal device 11 may notify the crew of the ship 8 when the accumulated wear amount specified as described above satisfies a predetermined condition. For example, the terminal device 11 specifies the time when the accumulated wear amount reaches a predetermined threshold, and notifies the crew of the ship 8 as the cylinder liner replacement time.
　また、端末装置１１が、低温腐食速度特定手段１１５により将来の航行に関し特定した低温腐食速度、または、摩耗量特定手段１１６により将来の航行に関し特定した期間内摩耗量に基づき、予め定められた条件を満たすエンジンの負荷と燃料油の油種やシリンダ潤滑油の量等の組み合わせを適正状態として特定する適正状態特定手段を備える構成が採用されてもよい。 In addition, the terminal device 11 has a predetermined condition based on the low temperature corrosion rate specified for the future navigation by the low temperature corrosion rate specifying means 115 or the amount of wear in the period specified for the future navigation by the wear amount specifying means 116. A configuration including an appropriate state specifying unit that specifies a combination of the engine load satisfying the above and the type of fuel oil, the amount of cylinder lubricant, and the like as an appropriate state may be employed.
　適正状態特定手段が適正状態の特定に用いる予め定められた条件の一例は、燃料油のコスト、シリンダ潤滑油のコスト、シリンダライナの交換に伴うコストの合計値が所定の閾値以下となる、もしくは当該合計値が最小となる、という条件である。端末装置１１は、例えば適正状態特定手段により特定した適正状態を船舶８の乗組員等に表示する。乗組員等は、端末装置１１から提示された適正状態に従い、船舶８の航行速度を調整し、また、使用する燃料油の油種やシリンダ潤滑油の量等を調整することにより、船舶８の航行に伴うコストを低減することができる。 An example of the predetermined condition used by the appropriate state specifying means for specifying the appropriate state is that the total value of the cost of the fuel oil, the cost of the cylinder lubricant, and the cost associated with replacement of the cylinder liner is equal to or less than a predetermined threshold value, or The condition is that the total value is minimized. The terminal device 11 displays the appropriate state specified by the appropriate state specifying means, for example, on the crew of the ship 8 or the like. The crew or the like adjusts the navigation speed of the ship 8 according to the appropriate state presented from the terminal device 11, and also adjusts the type of fuel oil to be used, the amount of cylinder lubricant, etc. Costs associated with navigation can be reduced.
（２）上述した実施形態において、硫酸結露強度ＷLはサンプルデータ取得手段１２１により取得された多数のサンプルデータに基づき硫酸結露強度特定手段１２３により特定される。これに代えて、例えば船舶８の管理会社の職員等により硫酸結露強度ＷLが決定されてもよい。この場合、船舶８の管理会社の職員等は、船舶８に搭載されているエンジンの特性に基づき硫酸結露強度ＷLを決定する。その後、シリンダドレン油の含有鉄分分析の結果等に照らして、決定した硫酸結露強度ＷLの妥当性を確認し、必要に応じて硫酸結露強度ＷLの修正を行う。このように人間により決定された硫酸結露強度ＷLが低温腐食速度特定手段１１５による低温腐食速度ＣＩの特定に用いられてもよい。 (2) In the embodiment described above, it is identified by the sulfuric acid dew intensity specification unit 123 based on the number of sample data obtained by the sulfuric acid dew intensity W L is the sample data acquisition unit 121. Alternatively, for example, by officials of the management company of the ship 8 it may be determined sulfuric acid dew strength W L. In this case, officials of the management company of the ship 8 determines the sulfuric acid dew intensity W L based upon the characteristics of the engine mounted in a ship 8. Then, in light of the results of content iron analysis of the cylinder drain oil, determined to confirm the validity of the sulfuric acid dew strength W L, to correct the sulfuric acid dew intensity W L as required. Thus sulfuric acid dew strength was determined by a human W L may be used in certain low-temperature corrosion rate CI by low-temperature corrosion rate identifying means 115.
（３）上述した実施形態において、硫酸結露強度特定手段１２３が硫酸結露強度ＷLの特定に用いるサンプルデータは、例えばシリンダドレン油の含有鉄分分析の結果に基づき推定された低温腐食速度ＣＩを含む。シリンダドレン油の含有鉄分分析には手間とコストがかかる。従って、必要数のサンプルデータの取得が困難な場合がある。そのため、例えばサーバ装置１２が硫酸結露強度特定手段１２３により既に特定している硫酸結露強度ＷLに基づき、十分な数のサンプルデータが得られないエンジンに関する硫酸結露強度ＷLを特定する構成が採用されてもよい。 (3) In the above embodiment, the sample data sulfate condensation strength specifying unit 123 is used in particular sulfuric acid dew intensity W L includes, for example, the estimated low corrosion rates CI based on the results of containing iron analysis of the cylinder drain oil . Analyzing the iron content of cylinder drain oil takes time and money. Therefore, it may be difficult to obtain the required number of sample data. Therefore, for example, already based on the sulfuric acid dew intensity W L which is identified by condensation server device 12 is sulfate strength specifying unit 123, configured to identify the sulfuric acid dew intensity W L is adopted to an engine without a sufficient number of sample data is obtained May be.
　この場合、サンプルデータ取得手段１２１は、様々な種別のエンジンの各々に関し、硫酸結露強度特定手段１２３により既に特定されている硫酸結露強度ＷLと、エンジンの特性（例えば、ディレーティングマップの形状、シリンダライナの冷却水の設定温度等）を示す１以上の種別の特性値とを含むサンプルデータを取得する。 In this case, the sample data acquisition means 121, various relates each type of engine, a sulfuric acid dew intensity W L which has already been identified by the sulfuric acid dew strength specifying means 123, the characteristic of the engine (e.g., derating map shape, Sample data including one or more characteristic values indicating a set temperature of the cooling water of the cylinder liner) is acquired.
　サーバ装置１２は、サンプルデータ取得手段１２１により取得された多数のサンプルデータに基づき、エンジンの特性値と硫酸結露強度ＷLとの関係を特定する関係特定手段を備える。具体的には、関係特定手段は、例えばサンプルデータ取得手段１２１により取得されたサンプルデータに基づき、硫酸結露強度ＷLを従属変数、エンジンの特性値を独立変数（説明変数）とする重回帰分析等の既知の統計手法により、エンジンの特性値と硫酸結露強度ＷLの関係式を特定する。 The server device 12, based on the number of sample data acquired by the sample data acquisition unit 121 includes a relationship specifying means for specifying a relationship between the characteristic value and the sulfuric acid dew intensity W L of the engine. Specifically, the relationship identifying means, for example on the basis of the sample data sample data obtained by the obtaining unit 121, multiple regression analysis for the dependent variable sulfate condensation intensity W L, independent variable characteristic values of the engine (explanatory variables) by known statistical methods etc., to identify the characteristic values of the engine and relationship of sulfuric acid dew intensity W L.
　また、サーバ装置１２は、硫酸結露強度ＷLが未特定のエンジンの特性値を取得する特性値取得手段を備える。硫酸結露強度特定手段１２３は、特性値取得手段により取得された特性値を、関係特定手段により特定された関係式に代入することにより、未特定であった硫酸結露強度ＷLを特定する。 The server device 12 includes a characteristic value obtaining means sulfate condensation intensity W L to obtain the characteristic values of the non-specific engine. Sulfate condensation intensity specifying means 123, the characteristic value acquired by the characteristic value obtaining means, by substituting the equation specified by the relationship specifying unit specifies a sulfate condensation intensity W L was unidentified.
（４）上述した実施形態において、硫酸結露強度ＷLは離散値として与えられる。これに代えて、硫酸結露強度ＷLが連続値として与えられてもよい。例えば、サーバ装置１２の硫酸結露強度特定手段１２３が、離散値として特定した硫酸結露強度Ｗ10、Ｗ20、・・・、Ｗ100の回帰式ＷL＝ｆ（Ｌ）を特定してもよい。この場合、端末装置１１の硫酸結露強度取得手段１１１は、例えば負荷指標値取得手段１１２により取得された負荷指標値Ｌに応じた硫酸結露強度ＷLを、回帰式として特定されたＷL＝ｆ（Ｌ）に従い算出し、低温腐食速度特定手段１１５に引き渡す。 (4) In the embodiment described above, sulfuric acid condensation intensity W L is given as discrete values. Alternatively, it may be sulfuric acid dew intensity W L is given as a continuous value. For example, sulfuric acid condensation strength specifying means 123 of the server device 12, the discrete identified sulphate condensation as value intensity W 10, W 20, · · ·, may identify the regression equation W of W 100 L = f (L) . In this case, sulfuric acid condensation intensity acquisition unit 111 of the terminal apparatus 11, for example, sulfuric acid condensation intensity W L corresponding to the acquired load index value L by the load index value acquisition unit 112, identified as a regression equation was W L = f Calculated according to (L) and delivered to the low temperature corrosion rate specifying means 115.
（５）上述した実施形態において、端末装置１１またはサーバ装置１２は算出式に従う演算により低温腐食速度や期間内摩耗量を特定する。これに代えて、端末装置１１またはサーバ装置１２が、対応表を参照することによってこれらの値を特定する構成が採用されてもよい。 (5) In the above-described embodiment, the terminal device 11 or the server device 12 specifies the low temperature corrosion rate and the amount of wear within the period by calculation according to the calculation formula. Instead, a configuration in which the terminal device 11 or the server device 12 identifies these values by referring to the correspondence table may be employed.
（６）上述した実施形態において端末装置１１が行うものとした処理の少なくとも一部をサーバ装置１２が行う構成が採用されてもよい。また、上述した実施形態においてサーバ装置１２が行うものとした処理の少なくとも一部を端末装置１１が行う構成が採用されてもよい。 (6) A configuration in which the server device 12 performs at least a part of the processing performed by the terminal device 11 in the above-described embodiment may be employed. In addition, a configuration in which the terminal device 11 performs at least a part of the processing that the server device 12 performs in the above-described embodiment may be employed.
（７）上述した実施形態において、端末装置１１およびサーバ装置１２は一般的なコンピュータがプログラムに従った処理を実行することにより実現される。これに代えて、端末装置１１およびサーバ装置１２の少なくとも一方が、いわゆる専用装置として構成されてもよい。 (7) In the above-described embodiment, the terminal device 11 and the server device 12 are realized by a general computer executing processing according to a program. Instead, at least one of the terminal device 11 and the server device 12 may be configured as a so-called dedicated device.
（８）上述した実施形態において、コンピュータ１０が端末装置１１を実現するために実行するプログラムは、例えばインターネット等のネットワークを介してコンピュータ１０にダウンロードされてもよいし、記録媒体に持続的に記録されて配布され、当該記録媒体からコンピュータ１０に読み取られてもよい。また、上述した実施形態において、コンピュータ２０がサーバ装置１２を実現するために実行するプログラムは、例えばインターネット等のネットワークを介してコンピュータ２０にダウンロードされてもよいし、記録媒体に持続的に記録されて配布され、当該記録媒体からコンピュータ２０に読み取られてもよい。 (8) In the above-described embodiment, the program executed by the computer 10 to realize the terminal device 11 may be downloaded to the computer 10 via a network such as the Internet, or continuously recorded on a recording medium. May be distributed and read by the computer 10 from the recording medium. In the above-described embodiment, the program executed by the computer 20 to implement the server device 12 may be downloaded to the computer 20 via a network such as the Internet, or is continuously recorded on a recording medium. May be distributed and read by the computer 20 from the recording medium.
１…摩耗量特定システム、８…船舶、９…通信衛星、１０…コンピュータ、１１…端末装置、１２…サーバ装置、１３…端末装置、２０…コンピュータ、１０１…メモリ、１０２…プロセッサ、１０３…通信ＩＦ、１０４…表示装置、１０５…操作装置、１１１…硫酸結露強度取得手段、１１２…負荷指標値取得手段、１１３…属性値取得手段、１１４…記憶手段、１１５…低温腐食速度特定手段、１１６…摩耗量特定手段、１１７…送信手段、１１８…受信手段、１２１…サンプルデータ取得手段、１２２…記憶手段、１２３…硫酸結露強度特定手段、１２４…受信手段、１２５…送信手段、２０１…メモリ、２０２…プロセッサ、２０３…通信ＩＦ DESCRIPTION OF SYMBOLS 1 ... Wear amount identification system, 8 ... Ship, 9 ... Communication satellite, 10 ... Computer, 11 ... Terminal device, 12 ... Server device, 13 ... Terminal device, 20 ... Computer, 101 ... Memory, 102 ... Processor, 103 ... Communication IF ... 104 ... display device 105 ... operating device 111 ... sulfur dew condensation intensity acquisition means 112 ... load index value acquisition means 113 ... attribute value acquisition means 114 ... storage means 115 ... low temperature corrosion rate identification means 116 ... Wear amount identification means, 117 ... transmission means, 118 ... reception means, 121 ... sample data acquisition means, 122 ... storage means, 123 ... sulfuric acid dew condensation strength identification means, 124 ... reception means, 125 ... transmission means, 201 ... memory, 202 ... Processor, 203 ... Communication IF

Claims (12)

  1. 　エンジンの負荷の大小を示す負荷指標値を取得する負荷指標値取得手段と、
    　前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値を取得する属性値取得手段と、
    　前記負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を取得する硫酸結露強度取得手段と、
    　前記属性値と、前記硫酸結露強度とに基づき、前記シリンダ内の低温腐食の進行速度の指標を示す低温腐食指標値を特定する低温腐食速度特定手段と
    　を備える装置。     Load index value acquisition means for acquiring a load index value indicating the magnitude of engine load;
    Attribute value acquisition means for acquiring an attribute value which is at least one value of the sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration;
    Sulfuric acid dew condensation strength acquisition means for acquiring sulfuric acid dew condensation strength indicating the ease of occurrence of sulfuric acid dew condensation in the cylinder according to the load index value;
    An apparatus comprising: a low temperature corrosion rate specifying means for specifying a low temperature corrosion index value indicating an index of a low temperature corrosion progress rate in the cylinder based on the attribute value and the sulfuric acid condensation strength.
  2. 　前記低温腐食指標値に基づき前記シリンダ内のシリンダライナの摩耗量を特定する摩耗量特定手段を備える
    　請求項１に記載の装置。     The apparatus according to claim 1, further comprising wear amount specifying means for specifying a wear amount of a cylinder liner in the cylinder based on the low temperature corrosion index value.
  3. 　前記低温腐食指標値に基づき、予め定められた条件を満たす前記負荷指標値と前記属性値との組み合わせを適正状態として特定する適正状態特定手段を備える
    　請求項１に記載の装置。     The apparatus according to claim 1, further comprising: an appropriate state specifying unit that specifies a combination of the load index value and the attribute value satisfying a predetermined condition as an appropriate state based on the low temperature corrosion index value.
  4. 　前記摩耗量に基づき、予め定められた条件を満たす前記負荷指標値と前記属性値との組み合わせを適正状態として特定する適正状態特定手段を備える
    　請求項２に記載の装置。     The apparatus according to claim 2, further comprising: an appropriate state specifying unit that specifies, as an appropriate state, a combination of the load index value and the attribute value satisfying a predetermined condition based on the wear amount.
  5. 　前記属性値取得手段は、前記エンジンで使用される燃料油に含まれる硫黄量を前記属性値として取得する
    　請求項１乃至４のいずれか１項に記載の装置。     The apparatus according to any one of claims 1 to 4, wherein the attribute value acquisition unit acquires the amount of sulfur contained in fuel oil used in the engine as the attribute value.
  6. 　前記属性値取得手段は、前記エンジンで使用されるシリンダ潤滑油に含まれる塩基性物質の量を前記属性値として取得する
    　請求項１乃至５のいずれか１項に記載の装置。     The apparatus according to any one of claims 1 to 5, wherein the attribute value acquisition unit acquires an amount of a basic substance contained in a cylinder lubricant used in the engine as the attribute value.
  7. 　エンジンの負荷の大小を示す負荷指標値と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値と、前記負荷指標値に応じた負荷で運転される前記エンジンの前記属性値に応じた硫酸濃度のシリンダ内の低温腐食の進行速度の指標値とを示すサンプルデータを複数取得するサンプルデータ取得手段と、
    　前記サンプルデータ取得手段により取得された複数のサンプルデータに基づき、負荷指標値に応じた指標値であって、前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を特定する硫酸結露強度特定手段と
    　を備える装置。     Driving with a load index value indicating the magnitude of engine load, an attribute value that is at least one of the sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration, and a load corresponding to the load index value Sample data acquisition means for acquiring a plurality of sample data indicating an index value of the progress rate of low-temperature corrosion in a cylinder having a sulfuric acid concentration according to the attribute value of the engine;
    Based on a plurality of sample data acquired by the sample data acquisition means, the sulfuric acid dew condensation strength is an index value corresponding to a load index value, and specifies sulfuric acid dew condensation strength that indicates the likelihood of sulfuric acid condensation in the cylinder. A device comprising: a specifying means.
  8. 　特性の異なる複数のエンジンの各々に関し、当該エンジンの特性を示す特性値と、当該エンジンの負荷の大小を示す負荷指標値に応じたシリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度とを含むサンプルデータを取得するサンプルデータ取得手段と、
    　前記サンプルデータ取得手段により取得された複数のサンプルデータに基づき、前記特性値と前記硫酸結露強度との関係を特定する関係特定手段と
    　を備える装置。     For each of a plurality of engines having different characteristics, a characteristic value indicating the characteristic of the engine, and a sulfuric acid dew condensation strength indicating the likelihood of sulfuric acid condensation in the cylinder according to a load index value indicating the magnitude of the load of the engine Sample data acquisition means for acquiring sample data including:
    An apparatus comprising: a relationship specifying unit that specifies a relationship between the characteristic value and the sulfuric acid dew condensation intensity based on a plurality of sample data acquired by the sample data acquiring unit.
  9. 　コンピュータに、
    　エンジンの負荷の大小を示す負荷指標値を取得する処理と、
    　前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値を取得する処理と、
    　前記負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を取得する処理と、
    　前記属性値と前記硫酸結露強度とに基づき、前記シリンダ内の低温腐食の進行速度の指標値を特定する処理と
    　を実行させるためのプログラム。     On the computer,
    Processing for obtaining a load index value indicating the magnitude of the engine load;
    A process of obtaining an attribute value which is at least one value of a sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration;
    A process for obtaining sulfuric acid dew condensation strength indicating the degree of occurrence of sulfuric acid dew condensation in the cylinder according to the load index value;
    A program for executing a process for specifying an index value of a progress rate of low-temperature corrosion in the cylinder based on the attribute value and the sulfuric acid condensation strength.
  10. 　コンピュータに、
    　エンジンの負荷の大小を示す負荷指標値と、前記エンジンのシリンダ内の硫酸濃度または当該硫酸濃度に影響を与える属性の少なくとも１つの値である属性値と、前記負荷指標値に応じた負荷で運転される前記エンジンの前記属性値に応じた硫酸濃度のシリンダ内の低温腐食の進行速度の指標値とを示すサンプルデータを複数取得する処理と、
    　前記複数のサンプルデータに基づき、負荷指標値に応じた前記シリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度を特定する処理と
    　を実行させるためのプログラム。     On the computer,
    Driving with a load index value indicating the magnitude of engine load, an attribute value that is at least one of the sulfuric acid concentration in the cylinder of the engine or an attribute affecting the sulfuric acid concentration, and a load corresponding to the load index value A process of acquiring a plurality of sample data indicating an index value of the progress rate of low-temperature corrosion in a cylinder having a sulfuric acid concentration in accordance with the attribute value of the engine,
    A program for executing a process of identifying sulfuric acid condensation intensity indicating the likelihood of sulfuric acid condensation in the cylinder based on the load index value based on the plurality of sample data.
  11. 　コンピュータに、
    　特性の異なる複数のエンジンの各々に関し、当該エンジンの特性を示す特性値と、当該エンジンの負荷の大小を示す負荷指標値に応じたシリンダ内における硫酸の結露の生じやすさを示す硫酸結露強度とを含むサンプルデータを取得する処理と、
    　前記複数のサンプルデータに基づき、前記特性値と前記硫酸結露強度との関係を特定する処理と
    　を実行させるためのプログラム。     On the computer,
    For each of a plurality of engines having different characteristics, a characteristic value indicating the characteristic of the engine, and a sulfuric acid dew condensation strength indicating the likelihood of sulfuric acid condensation in the cylinder according to a load index value indicating the magnitude of the load of the engine Processing to obtain sample data including
    The program for performing the process which specifies the relationship between the said characteristic value and the said sulfuric acid dew condensation intensity | strength based on these sample data.
  12. 　請求項９乃至１１のいずれか１項に記載のプログラムを持続的に記録するコンピュータ読み取り可能な記録媒体。 A computer-readable recording medium for continuously recording the program according to any one of claims 9 to 11.
PCT/JP2015/071065 2015-07-24 2015-07-24 Device for specifying ease of occurrence of low-temperature corrosion in engine cylinder, program and recording medium WO2017017717A1 (en)

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