DK201800086A1 - 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
DK201800086A1
DK201800086A1 DKPA201800086A DKPA201800086A DK201800086A1 DK 201800086 A1 DK201800086 A1 DK 201800086A1 DK PA201800086 A DKPA201800086 A DK PA201800086A DK PA201800086 A DKPA201800086 A DK PA201800086A DK 201800086 A1 DK201800086 A1 DK 201800086A1
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Prior art keywords
sulfuric acid
cylinder
value
engine
index value
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DKPA201800086A
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Danish (da)
Inventor
Masayuki Beppu
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Nippon Yusen Kk
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Priority to DKPA202000406A priority Critical patent/DK180772B1/en
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Publication of DK180414B1 publication Critical patent/DK180414B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00Component parts, details or accessories, not otherwise provided for
    • F02B77/08Safety, indicating, or supervising devices
    • F02B77/083Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00Testing or monitoring of control systems or parts thereof
    • G05B23/02Electric testing or monitoring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00Monitoring properties or operating parameters of vessels in operation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10Indicating devices; Other safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00Component parts, details or accessories, not otherwise provided for
    • F02B77/08Safety, indicating, or supervising devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D29/00Controlling 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
    • F02D29/02Controlling 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D45/00Electrical control not provided for in groups F02D41/00 - F02D43/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/18Other cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/18Indicating or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/22Safety or indicating devices for abnormal conditions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

Terminal apparatus 11 stores a sulfurie acid condensation intensity acquired by sulfurie acid condensation intensity acquisition means 111 in storage means 114. The sulfurie acid condensation intensity is an index value indicating the likelihood of occurrence of condensation of sulfurie acid in a cylinder, and is specified in advance according to a load of an engine. Load index value acquisition means 112 acquires a current load index value for the engine. Attribute value acquisition means 113 acquires an attribute value (amount of sulfur contained in fuel oil, amount of calcium contained in cylinder lubricant, etc.) that influences the current sulfurie acid concentration in the cylinder. Low-temperature corrosion speed specification means 115 reads out, from storage means 114, a sulfurie acid condensation intensity corresponding to a load index value acquired by load index value acquisition means 112 and specifies a low-temperature corrosion speed of a cylinder liner based on the read-out sulfurie acid condensation intensity and attribute value acquired by attribute value acquisition means 113. Wear amount specification means 116 specifies the wear amount of the cylinder liner based on the low-temperature corrosion speed specified by low-temperature corrosion speed specification means 115.

Description

DESCRiH’røMDESCRiH'røM

MBåRATUS FOR SPECIFYING LIKELIHOOD OF OCCURRENCE OF LOW-TEMPERA'FURE CORROSION IN CYLINDER ØF ENCgNi,, PROGRAM, AND STORAGE MEDIUMMBA RATE FOR SPECIFYING LIKELIHOOD OF OCCURRENCE OF LOW-TEMPERA'FURE CORROSION IN CYLINDER ON ENCgNi ,, PROGRAM, AND STORAGE MEDIUM

méméM MméméM M

[OOOll The: present invention relates to a technique for specifying the likelihood of occurrence of low - te mperature corrosion in a cylinder of an engine.The present invention relates to a technique for specifying the likelihood of occurrence of low temperature corrosion in a cylinder of an engine.

Background Art [0002] If the wear; itinahnt of a eylmder liner of an engine exceeds a limit value, air-tightness in tire eylmder cannot he maintained, and an ineønroniønc.e^sneh^;a:'S:.:l^.pt being able to sufficiently obtain the output of the engine will occur. In particular, ^gilding; a cylinder liner of an engine mounted in a vessel, if the wear amount of the cylinder liner exceeds a limit valne during a voyage, a serious situation such as stalling is incurred in some cases. Accordingly, a Crew inemher of the vessel, i; worker for a company managing operation of the vessel, or the like needs to know the appropriate time at which to replace the cylinder liner.Background Art If the wear; it does not maintain a liner of an engine exceeds a limit value, air-tightness in tire does not maintain it, and an ineønroniønc.e ^ sneh ^; a: 'S:.: l ^ .pt being able to sufficiently obtain the output of the engine will occur. In particular, ^ gilding; a cylinder liner of an engine mounted in a vessel, if the wear amount of the cylinder liner exceeds a limit valne during a voyage, a serious situation such as stalling is incurred in some cases. Accordingly, a crew inemher of the vessel, i; worker for a company managing operation of the vessel, or the like needs to know the appropriate time at which to replace the cylinder liner.

[0003] Patent Literature I is an example of literature that discloses a mechanism for presenting an appropriate maintenance timing part mounted in a vessel. Patent Literature 1 discloses a system in. which a business server managed by a diesel main engine m anufaeturer receives part maintenance data for a diesel main engine mounted in i vessel from the vessel, performs part maintenance analysis based on data: such as the: received part maintenance data and the usage limit value of the park and transmits the result of the part maintenance analysis id the vessel and a PC of the company managing the operation of the vessel. According to the svsfem disclosed in Patent Literature 1, a crew memberofthe vessel, a ' !*;· workerfor the: company omnaging the opeeaMon of the vessel, or the like ean estimate the timing at which the part Will reach its usage: limit value by viewing a trend oftheprogressmn of dama ge to the part.Patent Literature I is an example of literature which discloses a mechanism for presenting an appropriate maintenance timing part mounted in a vessel. Patent Literature 1 discloses a system in. which a business server managed by a diesel main engine m anufaeturer receives part maintenance data for a diesel main engine mounted in a vessel from the vessel, performs part maintenance analysis based on data: such as the: received part maintenance data and the usage limit value of the park and transmits the result of the part maintenance analysis id the vessel and a PC of the company managing the operation of the vessel. According to the svsfem disclosed in Patent Literature 1, a crew memberofthe vessel, a '! *; · Workerfor the: company omnaging the opeeaMon of the vessel, or the like ean estimate the timing at which the party will reach its usage: limit value by viewing a trend of the progress of lady to the part.

Citation List Patent Lit|raf«ieCitation List Patent Lit | raf «ie

[0004} Patent Baeumeirt li JP 2002-221076APatent Baeumeirt li JP 2002-221076A

Sum mary of Invention Technical Problem [0005] A crew member of the vessel or the like can estimate the timing at which the wear amount of the cylinder liner will reach its limit value by recording wear amounts?'obtained by measuring and viewing the cylinder liner luring maintenance? inspection and; viewing a /trend?'^otthe progression of wcari However, when low*temperature corrosion occurs in the cylinder liner, wear rapidly? progresses, and fchere?ferO? there is a .-risk that ;thq ;wea?r ?a?m:é?unt:?wih? reacfe:?th?elimit vahie. before the estimated timing, Accordingily the crew member of the vessel Or the?like needs to know how ?hkely it is that low-temperature corrosion will occur in the cylinder.Sum of Invention Technical Problem A crew member of the vessel or the like can estimate the timing at which the wear amount of the cylinder liner will reach its limit value by recording wear amounts? 'Obtained by measuring and viewing the cylinder liner luring maintenance? inspection and; viewing a / trend? '^ otthe progression of wcari However, when low * temperature corrosion occurs in the cylinder liner, wear rapidly? progress, and further? ferO? there is a.-risk that; thq; wea? r? a? m: é? unt:? wih? reacfe:? th? elimit vahie. Before the estimated timing, According to the vessel member of the vessel Or the? like need to know how? low it is that low-temperature corrosion will occur in the cylinder.

[0006] In view of the foregpm?g; eireumsfca?nce, the present? invention ainss to provide a means for specifying the likelihood ?of? the occurrence: of low-temperature corrosion in a cylinder of an engine,;In view of the foregpm? G; eireumsfca? nce, the present? invention aims to provide a means for specifying the likelihood of? the occurrence: of low-temperature corrosion in a cylinder of an engine;

Solution to Problem [0007] In Order to solve the foregoing problem, the present invention proposes, as ?a årst aspect, ah apparatus including: a load index value acquisition means for acquiring a load index value Indicating a magnitude of a load of an engine; an attribute value acquisition means for acquiring an attribute value, which is a sulfuric acid concentration in a cylinder of the engine of at least· oris value of an attribute that influences the sulfuric acid concentration! a sulfuric acid condensation intensity acquisition means for acquiring a sulfuric acid condensation intensity indicating a likelihood of occurrenceof condensation of sullurie acidin the cylinder, corresponding tq the load index value! and a lowtemperature corrosion speed specification means::fersspeoif|'ing a low-temperature corrosion index value indicating an index fe: i Iiipparø :S|el8 of low - temperature corrosion In the cylinder basedon the attribute value and the sulfuric acid condensation intensity. [0008] In the apparatus according ip the first aspect, as a second aspect, it is possible to employ a configuration including a wear amount specification means for speei^ng a wear amount of a cylinder liner in the cylinder based on the low-temperature corrosion index value.Solution to Problem In order to solve the foregoing problem, the present invention proposes, as an age aspect, ah apparatus including: a load index value acquisition means for acquiring a load index value Indicating a magnitude of a load of an engine ; an attribute value acquisition means for acquiring an attribute value, which is a sulfuric acid concentration in a cylinder of the engine of at least oris value of an attribute that influences the sulfuric acid concentration! a sulfuric acid condensation intensity acquisition means for acquiring a sulfuric acid condensation intensity indicating a likelihood of occurrenceof condensation of sulluric acid in the cylinder, corresponding to the load index value! and a low-temperature corrosion speed specification means :: versspeoif | 'ing a low-temperature corrosion index value indicating an index fe: i Iiipparø: S | el8 of low-temperature corrosion In the cylinder based on the attribute value and the sulfuric acid condensation intensity. In the apparatus according to the first aspect, as a second aspect, it is possible to employ a configuration including a wear amount specification means for specifying a wear amount of a cylinder liner in the cylinder based on the low temperature. corrosion index value.

[0009} fh the apparatus according to the first aspect, as a third aspect, it is possible: ίο; employ a configuration including an appropriate state specification means for specifying, as an appropriate state, aeombination of the; lead Index; value and the attribute value that satisfies a pre-determined condition hased on the low-temperature corrosion index value, [0010.1 Ih the apparatus according to the second aspect, as a fourth aspect, it is possible to employ a Configuration including an appropriate state Specification means lor specifying, as an appropriate state, a combination of the load index value and the attrihute value that satisfies a pre· determined condition, based on the wear amount, [OOll] In the apparatus according to any of the first to fourth aspects, as a fifih aspect, if :ia possible to employ a configuration in which the attribute value acquisition means acquires an amount: of sulfur contained in fuel oil Used in the engine as the attribute value, [fiOiil In the apparatus according to any of the first to fifth aspects, as a sixth: aspect* it is possible to employ a configuration in which the attribute value acquisition means acquires Cm amount basic substance contained in cylinder lubricant used in the engine as the attribute value. mm Ais«, tile present invention proposes, as a seventh aspect, an apparatus including- a sample data a exposition means for acquiring a plurality of pieces of sample data that, indicates a load index value indicating a magnitude of a load of an engine, an attribute value, which is a sulfuric add concentration in a cylinder of the engine or at least one valne of an attribute that ip#u§hcea the snlfoiteaeM;^ amian index value lor a progression speed of low-temperature corrosion in a cylinder with a sulfuric acid concentraf ion correspondini to the aforibute value of the engine running at a load eoiresponding to the load index value? and a sulfmae acid condensation intensity specification means for specifying a sulfuric pid condensation intensity; which is an index value corresponding to a load intet val ue and inteates a likelihood of occurrence of condensa tion of sutteic acid ip the cylinder, based on a plurality of pieces pf sample data acquired bp the Sam pie data acquisition means , [0014] Also, the present invention proposes, as an eighth aspect, an apparatus including' a sample data acquisition means for, får each of a plurality of engines with different characteristics, acquiring sample data including a ch ar acteristic value Indicating a sulfuric acid condensation intensity M a likelihood of occurrence of condensation of sulfuric acid in a cylinder corresponding to a load index value indicating a magnitude of a lead of the engine? and a relationship specification means for specifying a relatfonshlp between the characteristic value and the sulfuric acid condensation infotetit based eh a plurality of pieces Of sample data acquired by the sample data acquisition means, fidf S] Also, the present invention proposes, as a ninth aspect, a program far causing a. computer to execute· processing for acquiring a load index value indicating a magnitude Of a load of an engine? processing for acquiring an attribute value, which is a sulfuric acid concentration in a cylinder of the engine Or Ut least One value Of an atfoifohO^ the sulfuric acid concentration processing for acquiring a sulfuric acid condensation intensity iisciicatirig: a likelihood of occurrence of condensation of sulfuric acid in the cylinder corresponding to the load index valne; and prueessingfbr specifying an index value for a progression Speed of lovrteraperahire corrosion in the cylinder based on the attribute value arid the sidfuric: acid condensation intensity.For the apparatus according to the first aspect, as a third aspect, it is possible: ίο; employ a configuration including an appropriate state specification means for specifying, as an appropriate state, aeombination of the; lead Index; value and the attribute value which satisfies a pre-determined condition having the low-temperature corrosion index value, as the apparatus according to the second aspect, as a fourth aspect, it is possible to employ a Configuration including an appropriate state Specification means lor specifying, as an appropriate state, a combination of the load index value and the attrihute value that satisfies a pre-determined condition, based on the wear amount, [OOll] In the apparatus according to any of the first to fourth aspects, as a fifih aspect, if: ia possible to employ a configuration in which the attribute value acquisition means acquires an amount: of sulfur contained in fuel oil Used in the engine as the attribute value, [fiOiil In the apparatus according to any of the first to fifth aspects, as a sixth: aspect * it is possible to employ a configuration in which the attribute value acquisition means acquires Cm amount of basic substance contained in cylinder lubricant used in t he engine as the attribute value. mm Ais «, tile present invention proposes, as a seventh aspect, an apparatus including - a sample data an exposition means for acquiring a plurality of pieces of sample data which, indicates a load index value indicating a magnitude of a load of an engine, an attribute value, which is a sulfuric add concentration in a cylinder of the engine or at least one valence of an attribute that ip # u§hcea the snlfoiteaeM; ^ amian index value lor a progression speed of low-temperature corrosion in a cylinder with a sulfuric acid concentraf ion correspondini to the aforibute value of the engine running at a load eoiresponding to the load index value? and a sulfmaic acid condensation intensity specification means for specifying a sulfuric pid condensation intensity; which is an index value corresponding to a load no val ue and entails a likelihood of occurrence of condensation of sutteic acid ip the cylinder, based on a plurality of pieces pf sample data acquired bp the Sam pie data acquisition means, [0014] Also , the present invention proposes, as an eighth aspect, an apparatus including a sample data acquisition means for obtaining a plurality of engines with different characteristics, acquiring sample data including a ch arteristic value Indicating a sulfuric acid condensation intensity M a likelihood of occurrence of condensation of sulfuric acid in a cylinder corresponding to a load index value indicating a magnitude of a lead of the engine? and a relationship specification means for specifying a relationship between the characteristic value and the sulfuric acid condensation infotetit based on a plurality of pieces of sample data acquired by the sample data acquisition means, fidf S] Thus, the present invention is proposed, as a ninth aspect , a program that causes a computer to execute processing for acquiring a load index value indicating a magnitude of a load of an engine? processing for acquiring an attribute value, which is a sulfuric acid concentration in a cylinder of the engine Or At least One value Of an atfoifohO ^ the sulfuric acid concentration processing for acquiring a sulfuric acid condensation intensity iisciicatirig: a likelihood of occurrence of condensation of sulfuric acid in the cylinder corresponding to the load index valne; and prueessingfbr specifying an index value for a progression Speed of lupreteraperahire corrosion in the cylinder based on the attribute value arid the sidfuric: acid condensation intensity.

[0016] Also, the present invention ae a ^ for causing a computer to execute- processing for acquiring a plurality of pieces of sample data that indicates a load index valde indicating a magnitude of a lead of an engine, an attribute value, whieli is a sulfuric acid eoncentratien in a cylinder of the engine or at least one value of an attribute that influences· the suifurie acid eoneentraturn, and. an index vakie for a progression speed of low temperature corrosion in a cylinder with a sulfuric acid concentration corresponding to the attribute vaMe pi the engine running at a load corresponding to tin? load index value; and processing tor specifying a sulfuric acid condensation intensity indicating a UkelihcK)d'hi-:Pø@t^ehicse of condensation of sulfuric acid in the cylinder, corresponding to a load index value, based on the plurality of pieces of sample data.[0016] Also, the present invention is a for causing a computer to execute processing for acquiring a plurality of pieces of sample data indicating a load index indicating a magnitude of an engine's lead, an attribute value, which is a sulfuric acid eoncentratien in a cylinder of the engine or at least one value of an attribute that influences the sufurie acid eoneentraturn, and. an index vakie for a progression speed of low temperature corrosion in a cylinder with a sulfuric acid concentration corresponding to the attribute vaMe pi the engine running at a load corresponding to tin? load index value; and processing tor specifying a sulfuric acid condensation intensity indicating a UkelihcK) hi-: Pø @ t ^ ehicse of condensation of sulfuric acid in the cylinder, corresponding to a load index value, based on the plurality of pieces of sample data.

[0017] Also, the present invention proposes, as an eleventh aspeel; a program for causing a computer to execute: processing for, for each of a plurality of engines with different characteristics, acquiring sample data including a characteristic value indicating a characteristic of the engine, and a sulfurife acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in a cylinder, corresponding to a load index value indicating a magnitude of a load of the? engine; and processing for specifying a relationsMp between the characteristic value and the sulfuric acid condensation intensity based on the plurality of pieces of sample data. 100:18] Also, the present invention proposes, as a twelfth aspect, a computer-readable storage medium permanently storing the program according to any of the ninth to eleventh aspects.Thus, the present invention is proposed as an eleventh aspect; a program for causing a computer to execute: processing for, for a plurality of engines with different characteristics, acquiring sample data including a characteristic value indicating a characteristic of the engine, and a sulfurife acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in a cylinder, corresponding to a load index value indicating a magnitude of a load of the? engine; and processing for specifying a relationshipMp between the characteristic value and the sulfuric acid condensation intensity based on the plurality of pieces of sample data. 100: 18] Also, the present invention proposes, as a twelfth aspect, a computer-readable storage medium to permanently disrupt the program according to any of the ninth to eleventh aspects.

Advantageous Effects of the invention [0019] Accordingtoaspect of the- thosspeed at which low *te m per a ture corrosion progresses in the cylinder of the engine can ise monitored.Advantageous Effects of the Invention According to the aspect of the thospeed at which low corrosion progress in the cylinder of the engine can be monitored.

[0020] According to the second aspect of the present invention* the wear amount .ufihepyiinderiin^ [0021] According to the third, aspe|f of the: p|efsen|: inVeptiorp the: appropriate states of the lead of the engine and the sullnrte acid concentration in the cylinder or the attribute value that influences the sulfuric acid concentration ate specified with consideration given to the progression speed of the iowdemperatuce corrosion in the cylinder, [0022] According to the fourth, aspect of the present invention, the appropriate .states of the load of the engine and the sulfuric acid concentration in the cylinder or the attribute value that influences file sulfuric acid concentration are -pvoirfe$he:- Wfc&e amount of the cylinder liner.[0020] According to the second aspect of the present invention, the wear amount. [0021] According to the third, aspe | f of the: p | efsen |: inVeptiorp the: appropriate states of the lead of the engine and the sulfuric acid concentration in the cylinder or the attribute value that influences the sulfuric acid concentration specified with consideration given to the progression speed of the atmospheric corrosion in the cylinder, according to the fourth aspect of the present invention, the appropriate .states of the load of the engine and the sulfuric acid concentration in the cylinder or the attribute value that influences file sulfuric acid concentration are -pvoirfe $ he: - Wfc & e amount of the cylinder liner.

[00281 According to the fifth aspect ofthepresentmvention, the progression speed of the low'teraperature corrosion in the cylinder is specified with consider at ion given to the amountof sulfur contained in the fuel oil.According to the fifth aspect of the present invention, the progression speed of the low'teraperature corrosion in the cylinder is specified with regard to ion given the amount of sulfur contained in the fuel oil.

[0024] According to -%e:. sixth aspect of the present invention, the progression speed of lowdemperaturo corrosion in fhecylinderis specified with consideration given to the amount of the basic substance contained in the cylinder lubricant.According to -% e:. sixth aspect of the present invention, the progression speed of low temperature corrosion in cylinder specified with consideration given to the amount of basic substance contained in the cylinder lubricant.

[0025] According to the seventh aspect of the present invention, the sidfurie acid condensation intensity, which indicates the likelihood of the occurrence of·ebhdehsltibn: of sulfuric acid in the cyhndoh is speeiiiedaceordmg to the load of the engines [0d2h] According to the eighth aspect of the present invention* the relationship between the characteristic of the engine andthe sullnric acid condensation intensity is specified.[0025] According to the seventh aspect of the present invention, the sidfurie acid condensation intensity, which indicates the likelihood of the occurrence of ebhdehsltibn: of sulfuric acid in the cyhndoh is speeiiiedaceordmg to the load of the engines [0d2h] According to the eighth aspect of the present invention * the relationship between the characteristic of the engine and the sullic acid condensation intensity is specified.

[0027] According to the ninth» tenth, and eleventh aspects: of the present invention, the apparatnses accordingto thtv first, seventh, and eighth aspects of the present invention are realized by a computer, [0028] According to the twelfth aspect of the present invention, the apparatuses according to the first, seventh, andeighth aspects of the present invention are realized by a computer eapableafreadingout a program from the storage medium and executing it,According to the ninth »tenth, and eleventh aspects: of the present invention, the apparatus according to thtv first, seventh, and eighth aspects of the present invention are realized by a computer, [0028] According to the twelfth aspect of the present invention. present invention, the apparatus according to the first, seventh, and other aspects of the present invention are realized by a computer eapableafreadingout a program from the storage medium and executing it,

Brief Description of Drawings [0029] FIG, l is a diagram showing an overall configuration Of a Wear amount^specification system according to an embodiment, FIG, 2 is a diagram showing a basic conhgurahicnof a computer tobe: employed as hardware for a terminal apparatus according to an embodiment FIG, 3 is a, diagram showing a basic eonhguratimriof^a^computer to he employed as hardware tor a server apparatus according to an embodiment . FIG, # is a diagram showing a functional Cpnhguration of the terminal apparatus according to an embodiment,Brief Description of Drawings FIG. 1 is a diagram showing an overall configuration Of a Wear amount ^ specification system according to an embodiment; FIG. 2 is a diagram showing a basic conggurahicnof a computer tobe: employed as hardware for a terminal apparatus. According to an embodiment FIG, 3 is a diagram showing a basic eonhguratimriof ^ a ^ computer to be employed as hardware tor a server apparatus according to an embodiment. FIG, # is a diagram showing a functional Cpnhguration of the terminal apparatus according to an embodiment,

FlGchis'a diagram illustrating a data configuration of a sulfuric acid condensation intensity table stored in the terminal apparatus according to .'to embodiment, FIG, fi; is a diagram for illustrating a concept of a sulfuric acid condensation intensity to he used by the terminal apparatos: according:;to an embodiment. FIG, 7 is a diagram: tor illustrating the: concept of the sulfuric acid condensation intensity to he used by the terminal apparatus according to an hmhddimeht» FIG. j$ is a diagram tor illustrating the concept of the sulfuric acid condensation intensity to be used by the terminal apparatus according to an embodiment, FIG. 9 is a diagram illustrating a data epn^Utofidn of a Wear amount management table stored & the ter mihal a pp aratus a ccor di iig to an embodiment,. FIG. 10 is a diagram showing a functional con figuration of the server apparatus according:% vim ninbodlmenfo FIG. II Is a diagram illustrating a data configuration of a low-temperature corrosion index value sample table stored in the server apparatus according to an embodiment.FlGchis'a diagram illustrating a data configuration of a sulfuric acid condensation intensity table stored in the terminal apparatus according to the embodiment, FIG, fi; is a diagram illustrating a concept of a sulfuric acid condensation intensity to be used by the terminal apparatus: according to an embodiment. FIG. 7 is a diagram illustrating the: concept of the sulfuric acid condensation intensity used by the terminal apparatus according to an hmhddimeht »FIG. j $ is a diagram illustrating the concept of the sulfuric acid condensation intensity to be used by the terminal apparatus according to an embodiment, FIG. 9 is a diagram illustrating a data epn ^ Utofidn of a Wear amount management table stored & the ter mihal a pp aratus and ccor di iig to an embodiment,. FIG. 10 is a diagram showing a functional con figuration of the server apparatus according to% vim ninbodlmenfo FIG. II is a diagram illustrating a data configuration of a low-temperature corrosion index value sample table stored in the server apparatus according to an embodiment.

Flik. 12 is a diagram illustrating a screen displayed on the terminal apparatus according to an embodiment,;Flik. 12 is a diagram illustrating a screen displayed on the terminal apparatus according to an embodiment;

Buscrip tion of E rnbodiments [00301 FmbodimentBuscrip tion of E rnbodiments

Hereinafter, Wear amount specification system 1 acCffodlhl |p' UP embodiment of the present invention will be described. FIG. 1 is a diagram showing an overall configuration of wear amount? speehSeafidn system 1, linear anihunt specification system l :¾a,g^temflbh the wear amount of a c> Imdcr liner of an engine: mounted in vessel 8. Note that wear amount: specification system 1 specifies the knv-temperature corrosion speed of the c> lindt r liner and specifies # wear amount obtained hy applying the specified low-temp era lure corrosion speed. fOfidll The wear amount of the cylinder liner means the amount of part# of the eyfinier liner that have been lost: due to wear, in the following description, the wear amount, of the cylinder liner is indicated by the amount hy which the thickness decreases in the case where the: thickness of the cylinder linernn the unused state is used as a reference, and it is expressed, in units of millimeters. However, the method for expressing the Wear amount is not. limited to this, and for example, the wear amount may be expressed ushag; the amount (in units of grams) by which the mass decreases imm the unused state of the cylinder linen Note that strictly speaking, the Wear amount of the cylinder liner differs depending ørt the position hi the axial direction and the position about the axis, but the average values thereof will be need in the followingdnscrjf 10032) The lowu mperature corrosion speed of the cylinder liner means the progression speed of the low-temperature corrosion in, the speed at which deterioration progresses due to low-temperature corrosion). In the following description, the low temperature corrosion speed of the eyihulei liner is expressed using the depth of the portions that deteriorate due to fewttemperafiur^ a unit time :p^(^,.UJxdi:te^p*e88ed: in units; of mlUunefeps per 1000 hours (oim/lOOOh). However, the method tor expressing the low'temperature corrosion speed is not limited to this, and for example, the lo:W'itemperatnre corrosion speed may be expressed using the mass (in units of grams per day) or the like of the portion that deteriorates due to the low'temperature corrosion ih a unit time period,; the low'temperatareiicofrOsion^speed itself need not be used., and an index value indicating the magnitude of the low’temperature corrosion speed may he used instead of the low'tem pera ture corrosion speed. Note that strictly speaking, the low -temperature corrosi on speed of the cylinder liner (or the index value indicating the magnitude of the low'temperature corrosion speed) differs depending: on the position in the axial direction and the position about the axis, but in the following description, the average values thereof will be u sedi [0083] Wear amount specification system \ includes terminal apparatus 11 mounted in vessel §,: ibP&rat us 12 that pdf forms data communication with terminal apparatus 11 via communication satellite 9, and terminal apparatus 13 that is used on land in order for a worker of the company managing the operation of vessel 8 or the like to browse data stored in server apparatus 12, for example, 10034) Ifete that although only one vessel 8 is shown in Flth 1, there are uormIPy multiple vessels 8, if there are multiple vessela 8, terminal appaiptUshi 11 mounted on each of multiple vessels 8 perform data comnmnication with server apparatus 12. Also, although only one terminal apparatus IS is shown in Fill, 1, the number ofterminal apparatuses 13 changes according to the. number-of people browsing the data stored in server apparatus 12. Also, although terminal apparatus 13 shown in FIG. 1 is arranged on land, the arrangement: location terminal apparatnsl3is not limited to being pu lani and for example, terminal apparatus lS may he on vessel 8.Hereinafter, Wear amount specification system 1 acCffodlhl | p The UP embodiment of the present invention will be described. FIG. 1 is a diagram showing an overall configuration of wear amount? speehSeafidn system 1, linear anihunt specification system l: ¾a, g ^ temflbh the wear amount of ac> Imdcr liner of an engine: mounted in vessel 8. Note that wear amount: specification system 1 specifies the knv-temperature corrosion speed of the c > lindt r liner and specifications # wear amount obtained hy applying the specified low-temp era lure corrosion speed. fOfidll The wear amount of the cylinder liner means the amount of part # of the custom liner that has been lost: due to wear, in the following description, the wear amount, of the cylinder liner is indicated by the amount hy which the thickness decreases in the case where the: thickness of the cylinder linernn the unused state is used as a reference, and it is expressed, in units of millimeters. However, the method of expressing the Wear amount is not. limited to this, and for example, the wear amount may be expressed ushag; the amount (in units of grams) by which the mass decreases in the unused state of the cylinder lines Note that strictly speaking, the Wear amount of the cylinder liner differs depending on the position hi the axial direction and the position about the axis, but the average values thereof will be required in the following paragraph 10032) The lowu mperature corrosion speed of the cylinder liner means the progression speed of the low-temperature corrosion in, the speed at which deterioration progresses due to low-temperature corrosion). In the following description, the low temperature corrosion speed of the eyeliner liner is expressed using the depth of the portions that deteriorate due to the low temperature of a unit time: p ^ (^, UJxdi: te ^ p * e88ed: in units; of However, the method for expressing the low-temperature corrosion speed is not limited to this, and for example, the lo: W-temperature corrosion speed may be expressed using the mass (in units of grams per day) or the like of the portion which deteriorates due to the low'temperature corrosion ih a unit time period,; the low'temperatareiicofrOsion ^ speed itself need not be used., and an index value indicating the magnitude of the low. Note that strictly speaking, the low-temperature corrosion on the cylinder liner speed (or the index value indicating the magnitude of the low'temperature corrosion speed) differs. depending: on the position in the axial direction and the position about the axis, but in the following description, the average values thereof will be u sedi [0083] Wear amount specification system \ includes terminal apparatus 11 mounted in vessel §,: ibP & rat us 12 that pdf forms data communication with terminal apparatus 11 via communication satellite 9, and terminal apparatus 13 used on land in order for a worker of the company managing the operation of vessel 8 or the like to browse data stored in server apparatus 12, for example, 10034 ) If only one vessel 8 is shown in Flth 1, there are multiple multiple vessels 8, if there are multiple vessels 8, terminal appaiptUshi 11 mounted on each of multiple vessels 8 perform data communication with server apparatus 12. Also, although only one terminal apparatus IS is shown in Fill, 1, the number of terminal devices 13 changes according to the. number-of people browsing the data stored in server apparatus 12. Also, although terminal apparatus 13 shown in FIG. 1 is arranged on land, the arrangement: location terminal equipment is not limited to being pu lani and for example, terminal apparatus lS may be on vessel 8.

[0035] The hardware conhgurations of terminal apparatus 1.1 and terminal apparatus 13 are computers for generalferminal apparatuses, for example, FIG. 2 is a diagram showing a basic configuration of computer 1Θ employed as hardware for terminal apparatus II and terminal apparatus 13. Computer 10 includes- memory 101 that stores various types of data? processor 1.02 that performs various types of data processing according to programs stored in memory 101 > communication IF 103, which is an IF interface} for performing data eommunieation with another apparatus; display apparatus 104 such as a liquid crystal display for displaying images tpauser; and operation apparatus 105 such as a keyboard that receives user operations, ;l%to-:thaf an external display· apparatus: that··:is connected to computer 10 may be used instead of or in addition to display apparatus 104 built, in computer 10. Also, an external operation apparatus that is cenneeted to Cmnputer 10 may be used instead of or in addition to operation apparatus 105 built in computer 10, [00361 The hardware configuration of server apparatus 12 is a computer for a general server apparatus, for example. FIG. 3 is a diagram showing a basic; configuration of computer 20 employed as hardware lor server hppafatus 12, Compufor:;20'l;ncludes--memory\20idhdf:Stb^ of data; processor 202 that performs Various type#· of data processing according to programs stored in memory 201; and eomm unication IF 203 lor performing dsta: communicatidn with another apparatus. 10037] FIG. 4 is a diagram showing a functional configuration of terminal apparatus il* That is, computer 10 functions as an apparatus including the epnhguraiiona shownin FIG. 4 by executing data processing according to a program for terminal apparatus 11. Hereinafter, functional constituent units of terminal apparatus 11 shown in FIB, 4 wii 1 be described. 1(30¾ Sulfuric add condensation intensity acquisition means 111 acquires the sulfuric acid condensation intensity corresponding to the engine of vessel $ in which terminal apparatus 11 is mounted. The sulfuric acid condensation intensity: is an index value indicating the likelihood Of the occurrence of condensation of sulfuric acid in the cy]inderiirh^:the.:.q»||ine4s running at a certain load,: and. is Specified' |p advance adepidihg to various loads for each engine.[0035] The hardware configurations of terminal apparatus 1.1 and terminal apparatus 13 are computers for general terminal apparatus, for example, FIG. 2 is a diagram showing a basic configuration of computer 1Θ employed as hardware for terminal apparatus II and terminal apparatus 13. Computer 10 includes- memory 101 that stores various types of data? processor 1.02 that performs various types of data processing according to programs stored in memory 101> communication IF 103, which is an IF interface} for performing data eommunieation with another apparatus; display apparatus 104 such as a liquid crystal display for displaying images tpauser; and operation apparatus 105 such as a keyboard that receives user operations,; l% to-: thaf an external display · apparatus: that ··: is connected to computer 10 may be used instead of or in addition to display apparatus 104 built, in computer 10. Also, an external operation apparatus cenneted to Cmnputer 10 may be used instead of or in addition to operation apparatus 105 built into computer 10, the hardware configuration of server apparatus 12 is a computer for a general server apparatus, for example. FIG. 3 is a diagram showing a basic; configuration of computer 20 employed as hardware lor server hppafatus 12, Compufor:; 20'l; ncludes - memory \ 20idhdf: Stb ^ of data; processor 202 that performs Various type of data processing according to programs stored in memory 201; and eomm unication IF 203 lor performing dsta: communicatidn with another apparatus. 10037] FIG. 4 is a diagram showing a functional configuration of terminal apparatus; that is, computer 10 functions as an apparatus including the epnhguraiiona shown in FIG. 4 by executing data processing according to a program for terminal apparatus 11. Hereinafter, functional constituent units of terminal apparatus 11 shown in FIB, 4 wii 1 are described. 1 (30¾ Sulfuric add condensation intensity acquisition means 111 acquires the sulfuric acid condensation intensity corresponding to the engine of vessel $ in which terminal apparatus 11 is mounted. The sulfuric acid condensation intensity: is an index value indicating the likelihood of the occurrence of condensation of sulfuric acid in the cy] inderiirh ^: the.:. q »|| ine4s running at a certain load,: and. is Specified '| p advance adepidihg to various loads for each engine.

[00301 FIG, 5 is a diagram showing: a data configurat on of a table in which sulfuric acid condensation intensities acquired by sulfuric acid condensation intensity acquisition means 111 are stored. Hereinafter, the tabic shown in FIG. :§ will be referred to as ‘Sulfuric acid condensation intensity table”. The sulfuric acid condensation intensity fable is transmitted from server apparatus 12 to terminal apparatus 11 and is acquired by sulfuric acid condensation intensity acquisition means 111, Alternatively, the snlfurie acid condensation^ intensity table may be input to terndrml apparatus 11 by a crow member of vessel 8 or the like, for example, and he acquired by sul&amp;itdc acid condensation intensity acquisition means 111. fpQ4Dj The data in the sulfuric acid condensation intensity table differs for each engine identified by an engine ID (identifier). Load index values indicating magnitudes of loads of the engine are stored in the -load index value” eplnnur^^^m the sulfuric acid condensation intend table. Sulfuric acid condehsatlpn intensities Corresponding to each Of the load index vtdues (in the example shown in FIG * δ, 10%, 26%, ,,., and 100%) are stored in the %nhnric acid condensation intensity” column of the sulfuric acid condensation intensip table. Hereinafter the sulfuric acid condensation intensity for when the load index value is L(%) is denoted as Wl- [0041] FIGS, § to 8 are graphs for illustrating the concept of the sulfuric aciil eonhepsation intensity. FIG. 6 is a graph showing sulfuric acid condensation intensity Wio for when a certain engine (hereinafter, ''engine EG runs at a load corresponding to a load index value of 10%, FIG. 7 is a graph showing sulfuric acid.icondensstfoii::'intensity/W30: for when engine E runs at a load corresponding to a load index value of 30%, an<l FIG. S is a graph showing sulfuric acid condensation intensity W90 for when engineE runs at a toad corresponding to; a load index value of 90%. The X axes of the graphs shown In FIGS. 8 to 8 indicate the piston position in the cylinder and the Y axes indicate the temperature.FIG. 5 is a diagram showing: a data configured on a table in which sulfuric acid condensation intensities acquired by sulfuric acid condensation intensity acquisition means 111 are stored. Hereinafter, the tabic shown in FIG. : § will be referred to as 'Sulfuric acid condensation intensity table'. The sulfuric acid condensation intensity fable is transmitted from server apparatus 12 to terminal apparatus 11 and is acquired by sulfuric acid condensation intensity acquisition means 111 Alternatively, the snlfurie acid condensation ^ intensity table may be input to terndrml apparatus 11 by a crow member of vessel 8 or the like, for example, and acquired by sulfuric acid condensation intensity acquisition means 111. fpQ4Dj The data in the sulfuric acid condensation intensity table differs for each engine identified by an engine ID (identifier). Load index values indicating magnitudes of engine loads are stored in the -load index value ”with the sulfuric acid condensation intend table. Sulfuric acid condehsatlpn intensities Corresponding to each of the load index vtdues (in the example shown in FIG * δ, 10%, 26%, ,,., And 100%) are stored in the% nhnric acid condensation intensity column of the sulfuric acid condensation intensip table. Hereinafter, the sulfuric acid condensation intensity for when the load index value is L (%) is denoted as W1- [0041] FIGS. §8 to 8 are graphs to illustrate the concept of the sulfuric aciil eonhepsation intensity. FIG. 6 is a graph showing sulfuric acid condensation intensity Wio for when a certain engine (hereinafter, "" engine EG runs at a load corresponding to a load index value of 10%, FIG. 7 is a graph showing sulfuric acid.icondensstfoii :: " intensity / W30: for when engine E runs at a load corresponding to a load index value of 30%, an <l FIG. S is a graph showing sulfuric acid condensation intensity W90 for when engineE runs at a toad corresponding to a load index The X axes of the graphs shown in FIGS. 8 to 8 indicate the piston position in the cylinder and the Y axes indicate the temperature.

[0042] In FIGB, # to 8, graph B showsthe dew point temperature of the sulfuric acid in the cylinder which Chan according to the piston position in the cylinder. Also, graph T indicates the temperature of the inner surface of the cylinder liner, which changes according to the piston position: in the cylinder, [0043] The loW'tenrperature corrosion of the cylinder liner occurs mainly due to the sulfuric acid condensing on t he inner surface of the cylinder liner. Accordingly?; if IhC· temperature of the inner surface of the cylinder diner is higher than the dew point temperature of the IhitM cylinder, thp 'sulfuric acid does not condense on the cylinder l]her,? and the loW'tempemtnre corrosion of the cylinder liner hardly progresses at all. On the other hand, If the temperature of the inner surface of the cylinder liner is lower than the dew point temperature of the sulfuric acid in the cylinder, the sulfuric acid condenses on the cylinder liner and the lew'temperature corrosion:, of the cylinder liner progresses. In··this, case, the greater the amount of åhlfhrie acid that condenses is, the more quickly th*» low temperature corrosion of the cylindp liner progresses;.In FIGB, # to 8, graph B shows the dew point temperature of the sulfuric acid in the cylinder which Chan according to the piston position in the cylinder. Also, graph T indicates the temperature of the inner surface of the cylinder liner, which changes according to the piston position: in the cylinder, the low temperature corrosion of the cylinder liner occurs mainly due to the sulfuric acid condensing on t. he inner surface of the cylinder liner. Accordingly ?; if IhC temperature of the inner surface of the cylinder dinner is higher than the dew point temperature of the IhitM cylinder, thp 'sulfuric acid does not condense on the cylinder l] her ,? and the corrosion of the cylinder liner hardly progresses at all. On the other hand, If the temperature of the inner surface of the cylinder liner is lower than the dew point temperature of the sulfuric acid in the cylinder, the sulfuric acid condenses on the cylinder liner and the life temperature corrosion :, of the cylinder liner progresses. In this case, the greater the amount of eelphuric acid that condenses, the more quickly th * »low temperature corrosion of the cylinder liner progresses ;.

[0044] Accordingly, in FIGS, 6 ©cmpta on the cylinder liner? when' tfed: piston ;ii located within? a range in which graph T indicating iho temperature of the inner surface of the cylinder liner is local^.b^iow-gpcs'^fe^inøcatin^the dew-point temperature of the sulfuric acid, Also, when the piston is located within the raiigem which graph T is located below graph D, if the sulfuric add concentration in the cylinder is the same, in general, the amount of sulfuric acid that contuses increases 1¾ greater the distant 'Γ and graph D is. Bar this reason, the larger the area; of the region generated between graph D and graph T is, the More likely it is that sulfuric add will condense on the cylinder linen Note that in ETCX M there is no regi onin which graph Ilf is located below graph D, and thereføre condor sulfuric acid does not occur on the cylinderAccording to FIGS. 6 cmpta on the cylinder liner? when 'tfed: piston; ii located within? a range in which graph T indicates iho temperature of the inner surface of the cylinder liner is local ^ .b ^ iow-gpcs' ^ fe ^ inøcatin ^ the dew-point temperature of the sulfuric acid, Also, when the piston is located within the graph which graph T is located below graph D, if the sulfuric add concentration in the cylinder is the same, in general, the amount of sulfuric acid that contours increases 1¾ greater the distance 'and graph D is. Bar this reason, the larger the area; of the region generated between graph D and graph T, the more likely it is that sulfuric add will condense on the cylinder lines Note that in ETCX M there is no control on which graph Ilf is located below graph D, and therefor condor sulfuric acid does not occur on the cylinder

Ihpr·- ©4o] The sulfuric acid eon densation inton si ty is an indexvalue indicating the likelihood of the occurrence of condensation of sulfuric acid in the cylinder, and is conceptualized as the area of the region between graph T and graph IX If other 'Conditions such as thedriving state of asuperchargerare the: same:, as shown;ih BIOS, β to H, in general, the value of the sulfuric acid condensationintensity is larger the smaller the load of the engine is, and if the load of the engine exceeds a certain value, the value of the sulfuric acid eondensaflntt intensity often: becomes The point to he considered here is that thd sulfudd^acid condensation infensity is determined by the shapes and positions of graph T and graph D and is not influenced by the amount of sulfur contained in the fuel oil or the amount of a basic substance such as calcium contained in the cy&amp;der lubricant, [0046] The shapes and positions of graph T and graph D are determined by the characteristic of the engine. Examples of characteristics of the engine that influence the shapes and positions of graph T and graph D include, but are not limited to, the shape of a derating map, the sot temperature of a cyhnderhn^ Tmaxfintrawyliudermaximum combustion pressure^ Fmax/Bme (ratio between intra-cylinder maximum CpmhuXtiéB; pressure and brake mean effective pressure), and the wall temperature' distribution of the cylinder.;.Ihpr · - © 4o] The sulfuric acid eon densation inton si ty is an indexvalue indicating the likelihood of the occurrence of condensation of sulfuric acid in the cylinder, and is conceptualized as the area of the region between graph T and graph IX If other ' Conditions such as the driving state of superchargers the: same: as shown; in BIOS, β to H, in general, the value of the sulfuric acid condensation intensity is larger the smaller the load of the engine, and if the load of the engine exceeds a certain value, the value of the sulfuric acid and its intensity often becomes: The point to be considered here is that th e sulfudic acid condensation infensity is determined by the shapes and positions of graph T and graph D and is not influenced by the amount of sulfur contained in the fuel oil or the amount of a basic substance such as calcium contained in the cyber & lubricant, [0046] The shapes and positions of graph T and graph D are determined by the characteristic of the engi ne. Examples of engine characteristics that influence the shapes and positions of graph T and graph D include, but are not limited to, the shape of a derating map, the soot temperature of a cyhnderhn ^ Tmaxfintrawyliudermaximum combustion pressure ^ Fmax / Bme (ratio between intra-cylinder maximum CpmhuXtiéB; pressure and brake mean effective pressure), and the wall temperature 'distribution of the cylinder.;.

[0047] Note that the description given above With inference to FIGS. 6 to 8 is merely a description of the concept of the sulfuric acid roodensation mtehahp: Accordingly ::;i| is sufficient that : fhe sulfuric acid condensation int ensity has a positive correlation with the area of the region between graph D (a curved line indicating the dew-point temperature of sulfuric acid in the cylinder;,: which::: changes according te the: position of the; piston.· in the cylinder) and graph T (a curved line indicating the temperature of an inner surface of the cylinder liner,: which changes: according to the pisten, poshlon in the cylinder), and the sulfuric acid condensation intensity does pot necessarily need to match that area. :|il4:l] Nextj: an example ,of:: a :sulfuric: add condensation intensity; specification method will be given. It is assumed that at this time, a large amount of sample data indicating the load indp^ within a certain period, the amount of sulfur introduced into the cylinder per unit time (e.g.„ per day) in the period, the amount of the basic cylinder per unit time (e.ga pir day) in the perlpdj and the leW^temperatnre corrosion speed in the period has been obtained ter engine E. Note that if the basic substance is a substance that fulfills the role of a neulraliaer contained in tee cylinder lubricant or the like and caleiumffiased cylinder lubricant containing calcium is used, far example, the basic substance is Calcium. Also, an estimated vahte based on a measured value of an amount of iron contained in cylinder drain oil, ter example, is used as the Ipw-temibrature corrosion speed; [0049] Sulfuric acid condensation intensity Wl is defined as a numerical value that satisfies the conditions shown in Equation I below; ter example, when the idaS index value of the engine indicated by the sample ddfb lo denoted as L, the ihtro^ ameimt of sulfur per unit time (hereinafter referred to simply as “sulfur ammiaf) is denoted as S, the introduction amount of the basic substance per unit ftmete to simply as “basic substance amount”) is denoted as C, the low-temperature eortesipn speed-Is denoted as Cl, and the sulfuric acid concentration in the cylinder determined: according to: sulfur amount S and basic substance amount Ctfs. denotedtns Mr "Mote· that ,;a'! ip. a phstaiitithdliisriictd^ilitad according to the tteutra&amp;ingaMllty of the basic substance.[0047] Note that the description given above With inference to FIGS. 6 to 8 is merely a description of the concept of the sulfuric acid redensation mtehahp: Accordingly ::; i | is sufficient that: fhe sulfuric acid condensation int ensity has a positive correlation with the area of the region between graph D (a curved line indicating the dew-point temperature of sulfuric acid in the cylinder ;, which ::: changes according to the : position of the; piston. · in the cylinder) and graph T (a curved line indicating the temperature of an inner surface of the cylinder liner, which changes: according to the slopes, poshlon in the cylinder), and the sulfuric acid condensation intensity does not necessarily need to match that area. : | il4: l] Nextj: an example, of :: a: sulfuric: add condensation intensity; specification method will be given. It is assumed that at this time, a large amount of sample data indicating the load indp ^ within a certain period, the amount of sulfur introduced into the cylinder per unit time (eg "per day) in the period, the amount of the basic cylinder per unit time (eg pir day) in the perlpdj and the leW ^ temperature corrosion speed in the period has been obtained on engine E. Note that if the basic substance is a substance that fulfills the role of a neutralizer contained in tea cylinder lubricant or the like and calcium effected cylinder lubricant containing calcium is used, for example, the basic substance is Calcium. Also, an estimated value based on a measured value of an amount of iron contained in cylinder drain oil, for example, is used as the Ipw-temibrature corrosion speed; Sulfuric acid condensation intensity W1 is defined as a numerical value that satisfies the conditions shown in Equation I below; for example, when the idaS index value of the engine indicated by the sample ddfb is denoted as L, the ihtro ^ ameimt of sulfur per unit time (hereinafter referred to simply as "sulfur ammiaf) is denoted as S, the introduction amount of the basic substance per unit ftmete to simply as “basic substance amount”) is denoted as C, the low-temperature eortesipn speed-Is denoted as Cl, and the sulfuric acid concentration in the cylinder determined according to: sulfur amount S and basic substance amount Ctfs. denotedtns Mr "Mote · that,; a '! ip. a phstaiitithdliisriictd ^ ilitad according to the tteutra &amp; ingenMllty of the basic substance.

[.Equation Ij[.Equation Ij

...(Equation l) [0050] Regarding the combinations of L, S, C, and Cl indicated by tire large: amount of sample data, the Wl with the best application is specified in accordance with Equation 1 as the sulfuric acid condensation Intensity corresponding to thoiload indexvalue L.... (Equation l) Regarding the combinations of L, S, C, and Cl indicated by tire large: amount of sample data, the Wl with the best application is specified in accordance with Equation 1 as the sulfuric acid condensation Intensity corresponding to thoiload indexvalue L.

[0051] Mate that Equation 1 is an example of a method let calculating the sulfhrie acid condensation intensity and. an equation according to which it is possible to ealcnlaie: a sul&amp;ric acid condensation a- better application may be employgd instead of Equation 1. Also, regardless of the calculation equation, for example, a value obtained by a worker di the company managing vessel I or the like performing estimation based on the characteristic of the engine may· he used as the sulfuric acid Condensation Intensity. The preceding was a dqsqMptiqn of the sulfuric acid condensation intensity.Mate Equation 1 is an example of a method for calculating the sulfuric acid condensation intensity and. an equation according to which it is possible to apply: a sul & ric acid condensation a- better application may be employed instead of Equation 1. Also, regardless of the calculation equation, for example, a value obtained by a worker of the company managing vessel I or the like performing estimation based on the characteristic of the engine may be used as the sulfuric acid Condensation Intensity. The preceding was a dose of the sulfuric acid condensation intensity.

[0052] Returning to FIG, 4. description of the fonctionaleonstitiient units of terminal apparatus 11 Will continue. Load index value acquisition means: 112 acquires a load index: value from a control apparatus of the 0n|pn% example, iL value measured by: a: s.haft borsepower meter, for example, is used'.as the load index value. Alternatively, for example, a load index value estimated based on the amount of fuel consuniptiqiL vessel speed, propeller rotation rate, propeller torque, scavenging air pressure^ supercharger rotation: rate, prlthe ike· may he used. ’The load index value obtained by load index value acquisition means 112 is normally the load index value immediately after being measured, and substantially indicates the lead of the engmeduringacquisition.Returning to FIG, 4. description of the functional unit units of terminal apparatus 11 Will continue. Load index value acquisition means: 112 acquires a load index: value from a control apparatus of the 0n | pn% example, iL value measured by: a: s.haft borsepower meter, for example, is used'.as the load index value . Alternatively, for example, a load index value estimated based on the amount of fuel consuniptiqiL vessel speed, propeller rotation rate, propeller torque, scavenging air pressure ^ supercharger rotation: rate, prlthe ike · may be used. 'The load index value obtained by load index value acquisition means 112 is normally the load index value immediately after being measured, and substantially indicates the lead of the engmeduring acquisition.

[0053] ^ttiabdle value acquisition means 113 acquires an attribute value, which is the sulfuric acid concentration in the cylinder or at least one value of an attribute that mSuenees the sulfuric acid concentration in the cylinder. The attidbute ;/ya|ub;: acquired by attribute value acquisition means 113 is normally an attribute value that has just been measured, and essentially is the sulfuric acid concentration in the cylinder or an attribute value that iufluences the sulfuric acid concentration during acquisition. Examples of the types; øf attrjbnfa value# acquired by attribute value acquisition means .1..1.3 include the a mount ofsulfur introduced into the cylinder.theaniount of the basic substance introduced into the cylinder, and an external tempera turps Also, attribute value acquisition means 113 may acquire the sulfuric acid concent rut ion specifiedhased on the acquired amount and the like as the attribute value, [0054] Cylinder lubricant to which a calcium 'based additive is added is widely used in an engine for a vessel. If the cylinder lubricant tq which the ealeiurntbased additive is added is used, as one attribute value, attribute value acquisition means 113 acquires an amount of calcium in troduced i n to the cylinder as the amount of the basic substance. If the cylinder lubricant to Which an additive eontaiuing a substance other than calcium, such as magnesium or barium, is added is used as the basic substance,, attribute value acquisition means 113 may acquire the amount of magnesium,bariumy or the like as one attribute value instead of the calcium. In the following description, cylinder lubricant to which a calcium-based additive rs added is Used ht theehginqhf v^ and afctr i bu te val ue acquisition means 113 acquires the amount of calcium introduced into the cylmder as one of the attribute values^ [()(355] For example, attribute value acquisition means 113 reads out a sulfur content ratio of fuel oil from a storage apparatus, receives a flow anmuni per unit time of the fuel oil from a Bow amount met the amount of mdfur introduced per unit time into the cylinder by multiplying the sulfur content ratio by the flow amount of the fuel oil. Also, attribute value acquisition means 113 reads Out the cementratio of calcium in the cylinder lubricant from the storage apparatus, receives the Bow anrnnnt per unit time of the cylinder lubricant from the flow amount meter, and specifies the amount of calcium introduced per unit time into the eyÉnder by multiplying the content ratio of the ealciuis by the Bow amount of the cylinder lubricant.[0053] A value acquisition means 113 acquires an attribute value, which is the sulfuric acid concentration in the cylinder or at least one value of an attribute that mSuenees the sulfuric acid concentration in the cylinder. The attidbute; / ya | ub ;: acquired by attribute value acquisition means 113 is normally an attribute value that has just been measured, and is essentially the sulfuric acid concentration in the cylinder or an attribute value that iufluences the sulfuric acid concentration during acquisition. Examples of the types; øf attrjbnfa value # acquired by attribute value acquisition means .1..1.3 include the mount of sulfur introduced into the cylinder.theaniount of the basic substance introduced into the cylinder, and an external tempera turps Also, attribute value acquisition means 113 may acquire the sulfuric acid concent rut ion specified on the amount acquired and the like as the attribute value, Cylinder lubricant to which a calcium 'based additive is added is widely used in an engine for a vessel. If the cylinder lubricant tq which the ealeiurntbased additive is added is used, as one attribute value, attribute value acquisition means 113 acquires an amount of calcium in troduced i n to the cylinder as the amount of the basic substance. If the cylinder lubricant to Which an additive eontaiuing a substance other than calcium, such as magnesium or barium, is added is used as the basic substance ,, attribute value acquisition means 113 may acquire the amount of magnesium, bariumy or the like one attribute value instead of the calcium. In the following description, cylinder lubricant to which a calcium-based additive rs is added is used for the extraction and afte r i bu te val ue acquisition means 113 acquires the amount of calcium introduced into the cylinder as one of the attribute values ^ [( (355] For example, attribute value acquisition means 113 reads out a sulfur content ratio of fuel oil from a storage apparatus, receives a flow annuity per unit time of the fuel oil from a Bow amount with the amount of mdfur introduced per unit time into the cylinder by multiplying the sulfur content ratio by the flow amount of the fuel oil.Also, attribute value acquisition means 113 reads Out the cement ratio of calcium in the cylinder lubricant from the storage apparatus, the Bow receives approximately per unit time of the cylinder. lubricant from the flow amount meter, and specifies the amount of calcium introduced per unit time into the eyÉnder by multiplying the content ratio of the ealciuis by the Bow amount of the cylinder lubricant .

[0056] Storage means Π4 stores various types of data. Examples of the data stored by storage means 114 include a sulfuric acid condensation intensity table (FIG, 5.) acquired by sulfuric acid condensation; intensity acquisition means IFF a load index value acquired by load index value acquisition means 112, an attribute value acquired by attribute value acquisition means .1.13, a kw* tempera ture corrosion speed specified by later described low'fcemperature COrfO^iddi speed spCCilCation means 1XB, and an intraiperiod wear amount and cumulative wear amount specified by later'descrlbed:·'wear;amount specification means Fid, 1SB671 FIG. if is a diagram illustrating a data configuration of a table (hereinafter referred to as ‘\vear amount management table’') that is used to store wariouS:'%pes;of''data: received by storage means 114 tern load index value acquisition means 112, attribute value acquisition means 113, low-temperature corrosion speed specification means 115, and wear amount specification: means 116, The wear ainOtmt management: table is a collection of records for each; period of a predetermined length of time, for example, and records are aligned in order of their corresponding periods therein. As data fields, the wear amount management table includes ’’period”, “load index value”, ’’attribute valne Si “attribute value 2?V —·> Attribute value ηΓ fnote that n is the numher^of types of attribute values acquired by attribute value acquisition means 113), “low tempera ture corrosion speede, “intrå'periød wear amountA and Aumulative wear amount”. Note that the length øf time of the period eorresppadipg to each record piay beanyJefigth of ti^ex as loitg as it is a length of time of an extent according to which the load index valne and the attribute values do not sigmheantly change^ Also.the length of lime of the period corresponding to each record may differ for each record. tOOli if storage means 114 receives data from load index value acquisition means 111 nr attribute value acquisition means 113 in the periods corresponding to the records, It stoics the data in the field corresponding to that dat^ that: is, ‘load index value”, “attribute value 1”, “attribute value 2”, .... or “attribute value::;nA, At this time, if data is already Stored in the field that is the storage destmation^ storage means; 114 overwrites the old data rising the new data, for example, [00503 Also, if storage means 114 does not receive data from load index value acquisition means 111 or attribute value acquisition means -113 in the periods corresponding to the records, it copies the data of the previous record to the Same field In the current record (the field for which data Was n# .obtaihed)fnodihereaffep'iadds the record corresponding to-the;new period in the wear amount management table. Ϊ0060} As a result, the at tribute values (amount of sulfur introduced into the cylinder, amount of calcium introduced into the cylinder, etc.) that influence the sulfuric ;aeld.;cqncentrafion::^.::the cylinder in each period, and the load index value indicating the magnitude of the load of the engine are stored in association with each other in the wear amount management, table, lidblj The data stored in the fields 'lo wt em per atu re corrosion speed”, “intra-period wear amount”, and “cumulative wear amount” in the wear amount management table will be additionally described hi the description of low - tempo r a ture corrosion; speed specification means Ho and wear amount; specification meanaiftdi j0062l Returning to FIG, 4, description of the functional constituent units of 11 will continue. Low - temperature corrosion speed speelhcatipn::ni^ans^lIi:spe<#ies the low'temperature corrosion speed of the cylinder hhef based éif sulfuric a«.·id cupdødsafidi' lh|epsify c0rr:0Spdndin:|: 'to: tfefe' load index value acquired by load index value· acquisition means 142:: among· the sulfuric acid condensation intensities stored,Ih the øaIiniaCi::saøii: phnd^ tables (BIG, §),. and: the attribute values acquired by attribute value acquisition means 113. 10063} Specifically, for coach record in the wear amount management table (FIG. 0), iow"tenqvrature comNum speed specification means 115 first read4-out, from the sulfuric acid condensation intensity table (FIG. 5), sulfuric acid condensation intensity Wl corresponding lo load index yaiue L indicated by the data stored: in "load Index; valuer of the target record,: Then, in accordance with a pre’det.ermiued calculation equation, low* tempera ture corrosion speed speéiÉeation means 113 calculates low-temperature corrosion; speed: Gl of the cylinder liner in the period corresponding to the target record based on read Out sulfuric acid condensation intensity Wl and attribute values An·· As, ..., mid An stored in ""attribute value-F, “attribute value 2”,..., and %ttribute value n- ef the te [()664} The above- described Equation 1 is an example of a calculation equation that is used by low "temperature.· corrosion speed specification means 115 to ^anjÉÉe:lnw*'tenipeMf!Urie: corrosion speed GI when two types of attribute values, namely sulfur amount E and basic substance amount C, are usdd as variables. The calculation equation used by low-temperature corrosion speed specification means 115 to calculate low^temperature corrosion: speed ΟΪ is generalised as the following Equation 2.Storage means Π4 stores various types of data. Examples of the data stored by storage means 114 include a sulfuric acid condensation intensity table (FIG. 5.) acquired by sulfuric acid condensation; intensity acquisition means IFF a load index value acquired by load index value acquisition means 112, an attribute value acquired by attribute value acquisition means .1.13, a kw * tempera ture corrosion speed specified by later described low'fcemperature COrfO ^ iddi speed spCCilCation means 1XB , and an intraperiod wear amount and cumulative wear amount specified by later'descrlbed: · 'wear; amount specification means Fid, 1SB671 FIG. if is a diagram illustrating a data configuration of a table (hereinafter referred to as' \ vear amount management table ') which is used to store wariouS:'% pes; of''data: received by storage means 114 tern load index value acquisition means 112, attribute value acquisition means 113, low-temperature corrosion speed specification means 115, and wear amount specification: means 116, The wear ainOtmt management: table is a collection of records for each; period of a predetermined length of time, for example, and records are aligned in order of their corresponding periods therein. If data fields, the wear amount management table includes' 'period' ',' load index value ',' 'attribute valne Si' attribute value 2? V - ·> Attribute value ηΓ note that n is the numher ^ of types of attribute values acquired by attribute value acquisition means 113), "low tempera- ture corrosion speeds," intra-period wear amountA and Aumulative wear amount ". Note that the length of time of the period eorresppadipg to each record piay beanyJefigth of ti ^ ex as loitg as it is a length of time of an extent according to which the load index valne and the attribute values do not sigmheantly change ^ Also.the length of lime of the period corresponding to each record may differ for each record. tOOli if storage means 114 receives data from load index value acquisition means 111 no attribute value acquisition means 113 in the periods corresponding to the records, It stoics the data in the field corresponding to that ^ that: is, 'load index value', "Attribute value 1", "attribute value 2", .... or "attribute value ::; nA, At this time, if data is already stored in the field that is the storage destmation ^ storage means; 114 overwrites the old data rising the new data, for example, if storage means 114 does not receive data from load index value acquisition means 111 or attribute value acquisition means -113 in the periods corresponding to the records, it copies the data of the previous record to the Same field In the current record (the field for which data was n # .obtaihed) fnodihereaffep'iadds the record corresponding to-the; new period in the wear amount management table. Ϊ0060} As a result, the at tribute values (amount of sulfur introduced into the cylinder, amount of calcium introduced into the cylinder, etc.) that influence the sulfuric; aeld.; Cqncentrafion :: ^. :: the cylinder in each period , and the load index value indicating the magnitude of the engine load are stored in association with each other in the wear amount management, table, lid The data stored in the fields 'lo wt em per atu corrosion speed', "intra -period wear amount ”, and“ cumulative wear amount ”in the wear amount management table will be additionally described hi the description of low - tempo ra ture corrosion; speed specification means Ho and wear amount; specification meanaiftdi j0062l Returning to FIG. 4, description of the functional constituent units of 11 will continue. Low-temperature corrosion speed playthrough :: ni ^ ans ^ lIi: spe <#ies the low-temperature corrosion speed of the cylinder hhef based éif sulfuric a «. · Id cupdafsafidi 'lh | epsify c0rr: 0Spdndin: |:' to: tfefe 'load index value acquired by load index value · acquisition means 142 :: among · the sulfuric acid condensation intensities stored, Ih the øaIiniaCi :: saøii: phnd ^ tables (BIG, §),. and: the attribute values acquired by attribute value acquisition means 113. 10063} Specifically, for coach record in the wear amount management table (FIG. 0), iow "tenqvrature comNum speed specification means 115 first read4-out, from the sulfuric acid condensation intensity table (FIG. 5), sulfuric acid condensation intensity Wl corresponding to load index yaiue L indicated by the data stored: in "load Index; value of the target record, then, in accordance with a predetermined calculation equation, low temperature corrosion speed acceleration means 113 calculates low temperature corrosion; speed: Gl of the cylinder liner in the period corresponding to the target record based on read Out sulfuric acid condensation intensity Wl and attribute values An ·· As, ..., mid An stored in "" attribute value-F, "attribute value 2 ", ..., and% ttribute value n- ef the te [() 664} The above-described Equation 1 is an example of a calculation equation used at low" temperature. · Corrosion speed specification means 115 to ^ anjÉÉe: lnw * 'tenipeMf! Urie: corrosion speed GI when two types of attribute values, namely sulfur amount E and basic substance amount C, are used as variables. The calculation equation used by low-temperature corrosion speed specification means 115 to calculate low ^ temperature corrosion: speed ΟΪ is generalized as the following Equation 2.

[Equation 2|[Equation 2 |

Cl-f(WLj A} ? Ag,..., At,) ...(Equation 2) [66651 The calculation equation shown in Equation 2 is generated in advance in server apparatus 12, is received from server apparatus 12 by reception means 118, and is stored in storage means 114; Low- temperature corrosion speed specification means 115 reads out the calculation equation shown in Equation 2 fimmstorage means lid and uses it. Low-temperature corrosion speed specification means 115 stares^ calculated ^ corrosion speed Cl in “low-temperature corrosion epeed?i pf the target record in the wear a mount management tahle (ΕΙΟ. 9). |0|66l The calculation equation shown in Equation 2 is used in common even if the load of the engine differs; but a sulfuric acid condensation intensity that, is different fox each load is used. Accordingly; few-temperature^^ corrosion speed G1 calculated in accordance with Equation 2 is a value that differs according to the load, even if the a ttribute values are the same. Also, the calculation equation shown in Equation 2 is used in common for engines with different characteristics, but since a sulfuric acid condensation intensity that is different for each engine noth different SÉi.uråeteriatiéa" ia:us©%TÉiia low-temperature corrosion speed calculated in accordance with Equation 2 is a value that differs according to the characteristics of the engine; evéh if the attribute values and load index valnes are the sanie, KIM Wear amount specification means 116 specifies the wear amount of the cylinder liner in the period (hereinafter referred to as “intra-period wear amount”) ha*crf on the low - temperature corrosion speed specified |y low'temperature corrosion speed specification means 115. 11068] Specific ally, for each record of the wear amount management table (FIG. 9b wear amount specification means 116 calculates the amount of low-temperature corrosion of the cylinder liner that has progressed: in the period: (hereinafter referred to as 'intra-period low-temperature corrosion amount'") by multiplying the length of time of the period indicated by'Kpei?iod>,:':' in the target record by the low temperafure corrisfon speed stored ill 'lowTemperature corrosion speed” in the target record, and calculates the: intra-period'' wear .amount:: of the: cylinder· liner ^Corresponding: to. the calculated intra-period low-temperature corrosion amount in accordance with the pre?dhtermi»ed calculation equation. The calculation equation used hf wear amount specification means 116 to calculate the intra-period Wear00¾ generated in advance in served apparatus 12, is received by reeeptipn means 118 from server apparatus 12, and is stored in storage means 1.1.4, far example. Wear amount specification means 116 reads out the calculation equation from storage means 114 and uses it [0069] The calculation equation used by wear amount specification means 116 to calculate the intra'period wear amount may fee a function equation in which only the intra~period low-temperature <^mrosm amount is used as a variable, or may be a function equation in which parameters such as ffee rotation rate of the engine in the period, the amount of cyhndOr luhrioant introduced Into the cylinder in the period, and the value of‘‘cumulative wear amount" in the record prior to the target record are used in addition to the intra-period low^temperatme corrosion amount as variables. Note that The calculation equation used by wear amount specification means 116 to Calculate the intra-period wear amount differs according to the characteristics of the piston and cylinder liner and the Mhe, 166¾ Wear amount specification means 116 stores the calculated intr a‘period wear amount in Tntra-period wear amount." of the target record In the Wear amount management table (FIG. 91. Also, wear amount specification means 116 stores a value obtained by adding the value of ‘^traiperiod wear amount" of the target record to the value of “cumulative wear amount” of the prior record in ‘’cumulative- wear· amount" of the target record. Note that. “0” is stored in “eumidati^ of the record corresponding to the period immediately after the cylinder liner is replaced. Accordingly, the amount by which the cylinder liner is worn in the period from the replacement time to the end timing of the period is stored in ¾umu!atίve wear amount” of fhe wear amount management table.Cl-f (WLj A}? Ag, ..., At,) ... (Equation 2) [66651 The calculation equation shown in Equation 2 is generated in advance in server apparatus 12, is received from server apparatus 12 at reception means 118, and is stored in storage means 114; Low temperature corrosion speed specification means 115 reads out the calculation equation shown in Equation 2 fimmstorage means member and uses it. Low-temperature corrosion speed specification means 115 stares ^ calculated ^ corrosion speed Cl in “low-temperature corrosion epeed? I pf the target record in the wear a mount management range (9. 9). | 0 | 66l The calculation equation shown in Equation 2 is used in common even if the load of the engine differs; but a sulfuric acid condensation intensity that is different fox each load is used. Accordingly; few-temperature ^^ corrosion speed G1 calculated in accordance with Equation 2 is a value that differs according to the load, even if the a ttribute values are the same. Also, the calculation equation shown in Equation 2 is used in common for engines with different characteristics, but since a sulfuric acid condensation intensity that is different for each engine is not different SÉi.uråeteriatiéa "ia: us ©% TÉiia low-temperature corrosion speed calculated in accordance with Equation 2 is a value that differs according to the characteristics of the engine; if the attribute values and load index valnes are the sanction, KIM Wear amount specification means 116 specifies the wear amount of the cylinder liner in the period (hereinafter referred to as "intra-period wear amount") ha * crf on the low - temperature corrosion speed specified | y low'temperature corrosion speed specification means 115. 11068] Specific ally, for each record of the wear amount management table (FIG. 9b wear amount specification means 116 calculates the amount of low-temperature corrosion of the cylinder liner that has progressed: in the period: (hereinafter referred to as 'int' ra-period low-temperature corrosion amount "") by multiplying the length of time of the period indicated by "Kpei? iod>,:": "in the target record by the low temperafure corrisfon speed stored ill" lowTemperature corrosion speed "in the target record, and calculates the: intra-period '' wear .amount :: of the: cylinder · liner ^ Corresponding: to. the calculated intra-period low-temperature corrosion amount in accordance with the pre-dhtermi »ed calculation equation. The calculation equation used hf wear amount specification means 116 to calculate the intra-period Wear00¾ generated in advance in served apparatus 12, is received by reeeptipn means 118 from server apparatus 12, and is stored in storage means 1.1.4, far example. Wear amount specification means 116 reads out the calculation equation from storage means 114 and uses it [0069] The calculation equation used by wear amount specification means 116 to calculate the intra'period wear amount may fee a function equation in which only the intra ~ period low temperature <^ mrosm amount is used as a variable, or may be a function equation in which parameters such as ffee rotation rate of the engine in the period, the amount of cyhndOr luhrioant introduced Into the cylinder in the period, and the value of "cumulative wear amount" in the record prior to the target record are used in addition to the intra-period low ^ temperature corrosion amount as variables. Note that the calculation equation used by wear amount specification means 116 to calculate the intra-period wear amount differs according to the characteristics of the piston and cylinder liner and the Mhe, 166¾ Wear amount specification means 116 stores the calculated intr a'period wear amount in Tntr a-period wear amount. " of the target record In the Wear amount management table (FIG. 91. Also, wear amount specification means 116 stores a value obtained by adding the value of "^ traiperiod wear amount" of the target record to the value of "cumulative wear amount" of the prior record in "cumulative-wear · amount" of the target record. Note that "0" is stored in "eumidati ^ of the record corresponding to the period immediately after the cylinder liner is replaced. Accordingly, the amount by which the cylinder liner is worn in the period from the replacement time to the end timing of the period is stored in ¾umu! atίve wear amount ”of fhe wear amount management table.

IdfilXl Transmission means 117 transmits yarmui types of data to server apparatus 12, For example, transmission means if" franshiita th# data stored in Éife wear amount management table (FIG. 9) te servér apparatus 12. Reception means 118 receives various types of data from server apparatus 12. The functional constituent units of terminal apparatus 1.1 have been described above.IdfilXl Transmission means 117 transmits yarmui types of data to server apparatus 12, For example, transmission means if "franshiita th # data stored in Éife wear amount management table (FIG. 9) to serve apparatus 12. Reception means 118 receives various types of data from server apparatus 12. The functional constituent units of terminal apparatus 1.1 have been described above.

[.0072] FIG, 10: is> a diagram showing a functional configuration of server apparatus pi That is, computing a# an apparatus including:the ΒΊΟ. 10 by executing data processing according to a program: fbriserver apparatus 12. Hereinafter, fonctkmal constituent units of server apparatus 12 shown in FIG. 10 will be described. l007S] For pach of various engines, sample data acquisition means 121 acquires multiple pieces of sample data indicating load index value: in a certain period, one or more ty pes oil attribute values: that: influence: the sulfuric acid concentration in the cylinder in the period, and the law "temperature corrosion speed of the cylinder liner in the period. The sample data acquired by sample data acquisition means 12.1 is stored in storage means 122.[.0072] FIG, 10: is a diagram showing a functional configuration of server apparatus pi That is, computing a # an apparatus including: the ΒΊΟ. 10 by executing data processing according to a program: fbriserver apparatus 12. Hereinafter, fonctkmal constituent units of server apparatus 12 shown in FIG. 10 will be described. l007S] For pach of various engines, sample data acquisition means 121 acquires multiple pieces of sample data indicating load index value: in a certain period, one or more ty pes oil attribute values: that: influence: the sulfuric acid concentration in the cylinder in and the law "temperature corrosion speed of the cylinder liner in the period. The sample data acquired by sample data acquisition means 12.1 is stored in storage means 122.

[0074] FIG. 11 is a diagram illustrating a data tenftpiration p^ table in which the sample data acquired by sample data acquisition means ill: is stored (hereinafter referred to as “lOw-température cOTroslon speed sample tablet). The low’témperatte'e^^ cpTosiph speed sample table includes “engine ID”, hperimFi Hoad index value”, “attribute value 1”, '‘attribute value 2”, ..., “attrihute value n”, and ‘Tow'temperature corrosion speed” as fields; The identifiers of the engines are stored in “engine IB”, Bata of the |ηφ| type as the data stored in the fields of the same name in the wear amount management table (FIG. 9) is stored in ‘‘period”, 'Toad index value”, “attribute value “attribute value 2”, ..,, and ''Attribute value -h.fi Til# low temperature corrosion Spied of t he cylinder liner is stored in Howftemperature corrosion:speedf, [0075] The values stored in How* temperature corrosion speed” of tie law-temperature^ Corrosion speed, sample table are value# that are estimated basedon the results of analysing iron eontainedin the cylinder drain oil, for example. 1()076] FeturniUg to FIG, 10, description of the functional constituent units pf server apparatus 12 will continue. Storage moans ill stores various typos of data such as tie sulfuric acid condensation intensity tablefFlG. 5) corresponding to tie various engines, in addition to tie above-described low·temperature corrosion speed sample table, 11677] For the various engines, sulfuric acid condensation intensity specification means 126 specifies; tie sulfuric acid condensation intensity corresponding to tie load index value, based On tié lom'temperature corrosion speed sample tab!e (FIG. 11.)> [0078j For example, if sulfur amount S introduced into the eylinder per unit time in tie period || stored in “attribute value Γ’ of the low^eniperatare corrosion, speed sample table and: basic sidsstauee anmunt G introduced into tip cylinder per unit time in tie; target period is stored in. “attribute value 2”, sulfuric acid condensation intensity specification means 123 specifies sulfuric acid condensation intensity Wl corresponding to load index,: value 1 in accordance with the above-described Equation 1. for example, based On sulfur1 amount S. basic substance amount C, and low-temperature corrosion speed Cl stored in “lowt emperature corrosion speed". 1607:9] Sulluric acid con de n s a tion intensity Wfi specified, by sulfuric: acid condensation intensity specification means 123 is stored in storage means 122 in a state of being stored in. the sulfuric acid condensation intensity table corresponding to the engine ID of the target engine. 16636] SiepptiPn means 124 receives various types of data from terntihll apparatus 11 and terminal apparatus 13. Also, transmission means 125 transmits various types of data to terminal apparatus 11 and terminal apparatus 13. For ;$ί£ sulfuric acid Condensation intensity tpile ffem terming] apparatus 11. (Che request includes th®^^ of vessel B in which terminal apparatus 11 is moantei> Transnussion means 1.25 reads out, from storage means 122. the sulfuric add condensation intensity table corresponding to the engine ID Included in the request received by reception means 121 and transmits thwrf acid condensation intensity table to terminal apparatus 1:1,. ydich is the soume of the requ tOOSl] Also, reception means 124 receives the record of the wear amount management fable (FK3. 9) transmitted from each terminal apparatus 11 mounted in each vessel;8 along with t^ ID that identifies the engine ofyefsel8iu which terminal apparatus 11 is mounted. A copy of the wear amount management table stored in storage means 114 of terminal apparatus 11 is stored in storage means 122 according to each engine ID. In storage means 122, the ieeords of the wear amount management table received from terminal apparatus 11 by reception means 124 are sequentially added to the wear amount managerne tables correspending to the engine IDs that were received along with the records.FIG. 11 is a diagram illustrating a data tenure p ^ table in which the sample data acquired by sample data acquisition means ill: is stored (hereinafter referred to as “low-température cOTroslon speed sample tablet). The low'témperatte'e ^^ cpTosiph speed sample table includes "engine ID", hperimFi Hoad index value "," attribute value 1 "," 'attribute value 2 ", ...," attrihute value n ", and" Tow 'temperature corrosion speed' as fields; The identifiers of the engines are stored in “engine IB”, Bata of the | ηφ | type as the data stored in the fields of the same name in the wear amount management table (FIG. 9) is stored in "" period "," Toad index value "," attribute value "attribute value 2", .. ,, and '' Attribute value -h.fi Til # low temperature corrosion Spied of t he cylinder liner is stored in How temperature temperature corrosion: speedf, The values stored in How * temperature corrosion speed 'or tie law-temperature ^ Corrosion speed, sample table are value # that are estimated based on the results of analyzing iron in the cylinder drain oil, for example. 1 () 076] Referring to FIG, 10, description of the functional constituent units pf server apparatus 12 will continue. Storage moans ill stores various types of data such as tie sulfuric acid condensation intensity tablefFlG. 5) corresponding to tie various engines, in addition to tie above described low · temperature corrosion speed sample table, 11677] For the various engines, sulfuric acid condensation intensity specification means 126 specifications; tie sulfuric acid condensation intensity corresponding to tie load index value, based on ten lom'temperature corrosion speed sample tab! e (FIG. 11)> [0078j For example, if sulfur amount S is introduced into the cylinder per unit time in tie period || stored in “attribute value of” of the low ^ eniperatare corrosion, speed sample table and: basic seat stays by G introduced into tip cylinder per unit time in tie; target period is stored in. “Attribute value 2”, sulfuric acid condensation intensity specification means 123 specifications sulfuric acid condensation intensity Wl corresponding to load index,: value 1 in accordance with the above-described Equation 1. for example, based on sulfur1 amount S. basic substance amount C , and low-temperature corrosion speed Cl stored in "low-emperature corrosion speed". 1607: 9] Sulluric acid with the de nsa tion intensity Wfi specified, by sulfuric: acid condensation intensity specification means 123 is stored in storage means 122 in a state of being stored in. the sulfuric acid condensation intensity table corresponding to the engine ID of the target engine. 16636] SiepptiPn means 124 receives various types of data from terntihll apparatus 11 and terminal apparatus 13. Also, transmission means 125 transmits various types of data to terminal apparatus 11 and terminal apparatus 13. For; $ ί £ sulfuric acid Condensation intensity tfile ffem terming] apparatus 11. (Che request includes t h® ^^ of vessel B in which terminal apparatus 11 is monthly> Transnussion means 1.25 reads out, from storage means 122. the sulfuric add condensation intensity table corresponding to the engine ID Included in the request received by reception means 121 and transmits thwrf acid condensation intensity table to terminal apparatus 1: 1 ,. Also, the receipt of the requisition is too] Reception means 124 receives the record of the wear amount management fable (FK3. 9) transmitted from each terminal apparatus 11 mounted in each vessel; 8 along with t ^ ID that identifies the engine of which terminal apparatus 11 is mounted. A copy of the wear amount management table stored in storage means 114 of terminal apparatus 11 is stored in storage means 122 according to each engine ID. In storage means 122, the values of the wear amount management table received from terminal apparatus 11 by reception means 124 are sequentially added to the wear amount managers tables corresponding to the engine IDs that were received along with the records.

[0082] Also, reception means 124 receives a request to browse data irotn terminalapparatus.: Id*: The request includes the engine ID of the engine of vessel 8 for which thé workerPf tbhdømpany'managing"vesaél 8 or the like wants to know the cumulative wear anvumt or the like, for example. Transmission means 125 readsuut data such as the cumulative wear amount from the wear amount management: table corresponding to the engine ID included in the request received by reception means 124 and transmits the data, to terminal apparatus 13, which is the source of the request. The fundt}@naf:pønatiteeni:;.;utiits of the server apparatus 12 have been described above.Also, reception means 124 receives a request to browse data from the terminal device: Id *: The request includes the engine ID of the engine of vessel 8 for which the workerPf tbhdømpany'managing "vesaél 8 or the like wants to know the cumulative wear used or the like, for example Transmission means 125 readsuits data such as the cumulative wear amount from the wear amount management: table corresponding to the engine ID included in the request received by reception means 124 and transmits the data, to terminal apparatus 13, which is the source of the request.The found} @naf: pønatiteeni:;.; Utilities of the server apparatus 12 have been described above.

[0083] Terminal apparatus 13 is a general terminal apparatus that appesseS server apparatus 12 according to an operation performed by the user, displays data received from server apparatus 12, and the like. Accordingly, the description pf configuration of the terminal apparatus 13 is omitted. JÉM The low-temperature corrosion speed. intra-period wear amount, and cumulative wear amount of the cylinder liner of the engine of vessel 8 in 11 is mounted are continuously stored in the wear amount management tahl of FIG, 9) stored in storagemeans 11¾ of terminal apparatus II. The low-temperature corrosion speed;, intra-period wear amount, and cumulative wear amount, of the cylinder liner of the engine are continuously stored in storage means 122 of server apparatus 12 for the engines of various vessels.Terminal apparatus 13 is a general-purpose terminal apparatus that employs server apparatus 12 according to an operation performed by the user, displays data received from server apparatus 12, and the like. Accordingly, the description pf configuration of the terminal apparatus 13 is omitted. JÉM The low-temperature corrosion speed. Intra-period wear amount, and cumulative wear amount of the cylinder liner of the vessel 8 in 11 engine is mounted are continuously stored in the wear amount management range of FIG. 9) stored in storage units 11¾ of terminal apparatus II. The low-temperature corrosion speed ;, intra-period wear amount, and cumulative wear amount, of the cylinder liner of the engine are continuously stored in storage means 122 of server apparatus 12 for the engines of various vessels.

[0085] Terminal apparatus 11 displays the states of low-temperature corrosion and wear of the cylinier liner of vessel 8 in aecordanee with data stored in the wear amount, management table (FIG. 9) according to an operation performed by a crew member of vessel 8 or the like. Also, terminal apparatus i!3 accesses server apparatus 12 according to an operation performed by a worker of the company managing the vessel, or the like, and displays tin.1 state of low temperature corrosion and wear of the cylinder liner of the designated vessel in accordance with the data stored in the wear amount management table corresponding to the engine of the designated yelsel..Terminal apparatus 11 displays the states of low-temperature corrosion and wear of the cylinder liner of vessel 8 in aecordanee with data stored in the wear amount, management table (FIG. 9) according to an operation performed by a crew member of vessel 8 or the like. Also, terminal apparatus i! 3 accesses server apparatus 12 according to an operation performed by a worker of the company managing the vessel, or the like, and displays tin.1 state of low temperature corrosion and wear of the cylinder liner of the designated vessel in accordance with the data stored in the wear amount management table corresponding to the engine of the designated yelem ..

[0088] FIG. 12 is a diagram illustrating a wear amount management screen that is displayed; by ter mini! apparatus 11 or terminal apparatus 13 according to an operation performed by a user. The vessel name, engine ID. and most recept cylinder liner replacement dåtp pfr the ymar amount management, screen. Note that the most recent Cylinder liner replacement date is the date belonging to the start timing of the period, on which the cumulative wear amount most recently was "0”.FIG. 12 is a diagram illustrating a wear amount management screen that is displayed; by ter mini! apparatus 11 or terminal apparatus 13 according to an operation performed by a user. The vessel name, engine ID. and most prescription cylinder liner replacement then pfr the ymar amount management, screen. Note that the most recent Cylinder liner replacement date is the date associated with the start timing of the period, on which the most recent cumulative wear amount was "0".

[0087] Also, the current low-temperature corrosion speed and current wear speed are displayeison the wear amount management screen. Note that the current [owTemperature corrosion speed is the «peed that is indicated by the newest record. Also, the current, wear speed is calculated by dividing the infra* period wear amount indicated by the tength of time of the period« f0988] If the current low-temperature corrosion speed exceeds a pro - determined threshold, for example; a message stating “Low-temperature corrosion is progressing rapides Idease consider changing the type of fuel oil increasing the amount of cylipdiæ Itforicant, changing vessel speed, or the |ikef is displayed on the wear amount management screen. Also, if the current wear speed exceeds a pre^deiermined threshold in the state in which the current, low-temperature corrosion speed is less than or equal to a threshold, a message stating “Wear is progressing rapidly. Please consider Increasing idle amount of cylinder lubricant, or the like” is displayed on the wear amount management screen, 100891 Also, transitions in the cumulative wear amount are displa}Ted by a graph, for example; on the wear amount management screen. The graph displayed on the wear it is predicted that the cumulative wear amount will reach the limit yalue in the case where it is assumed that the wear will progress at a pace similar to that: of a past performance, [0090] A crew member of vessel s, a worker for the management company pf vessel 8, or the like can find out the state of low-temperature corrosion and wear of the cylinder liner in reahtime by viewing the wear amount management screen, [0091] Modified ExamplesAlso, the current low-temperature corrosion speed and current wear speed display the wear amount management screen. Note that the current [owTemperature corrosion speed is the «peed that is indicated by the newest record. Also, the current, wear speed is calculated by dividing the infra * period wear amount indicated by the length of time of the period «f0988] If the current low-temperature corrosion speed exceeds a pro - determined threshold, for example; a message stating “Low-temperature corrosion is progressing rapidly Idease consider changing the type of fuel oil increasing the amount of cylindrical Itforicant, changing vessel speed, or the | ikef is displayed on the wear amount management screen. Also, if the current wear speed exceeds a pre-de minimized threshold in the state in which the current, low-temperature corrosion speed is less than or equal to a threshold, a message stating “Wear is progressing rapidly. Please consider Increasing idle amount of cylinder lubricant, or the like ”is displayed on the wear amount management screen, 100891 Also, transitions in the cumulative wear amount are displa} Ted by a graph, for example; on the wear amount management screen. The graph displayed on the wear it is predicted that the cumulative wear amount will reach the limit yalue in the case where it is assumed that the wear will progress at a pace similar to that of a past performance, [0090] A crew member of vessel s, a worker for the management company pf vessel 8, or the like can find out the state of low-temperature corrosion and wear of the cylinder liner in reahtime by viewing the wear amount management screen, [0091] Modified Examples

The above-described embodiment can be modified in various ways Within·Thgicope of;:::the tedhhical idea of the present invention. Examples of these modifications: wtil be given below. Note that two or more modified examples below may be combined, [9092] (1) In the aboyevdescrihéd embodimenfe wear amount specification system 1 Specifiesthe Current andpast states of low-temperature corrosion anet wear øf the cylinder liner. Instead of or in addition to this, it is also possible to employ a configuration In which wear amount, specification IlSlein 1 specifies future states of low-temperature corrosion and wearoffche cylinder linen I80§3] in this modified example, for example;; terminal apparatus 11 iaeiiuires and stores data indicating a future voyage schedule of vessel 8, a type of fuel oil that is to be used, an amount of cylinder lubricant that is to be used, and the like. Note that the data such as the voyage schedule of vessel d may be input to terminal of vesseie, or the like, for example, or terminal apparatus 11 may receive the data from server apparatus f l. Based on the data such as the voyage sehudule af vesse! 8, terminal apparatus:! 1 specifies the load index value of the engine in a future voyage of vessel 8, an amount of sulfur contained in the fuel oil to be used, and an amount pf a basic substance contained in t h e cylinder lubricant to be usedv and specifies the lo w temperature eormsion speed, mtra-period wear amddhl, and cumulative wear amount based on these specitied pieces of data. Terminal apparatus 11 displays these specified pieces of information to a crew' member of vessel s or the like, for example. 10094] Also, terminal apparatus 11 may notify the crew member of vessel 8 or the like of the time at which the cumulative wear amount specified as described above-reaches a pM^determined condition; For example, terminal apparatus 11 specifies the time at which the cumulative wear amount reaches the predeteråfinéd threshdhi value and notifies the crew member of vessel 8 or the like of the specified time as the time at which to replace the cylinder linen [00951 Alao, a configuration may be employed in which terming] apparatus 11 includes an appropriate state specification means that specifies a combination of a load of the engine, a type of fuel oil, an amount of cylinder lubricant; and the like, which satisfies a pretleternu ned condition, as an appropriafe state based on the low-tempera ture corrosion speed specified for the firtureenepige by low-temperature corrosion speed specification means 1.15 or the intra*perio4 wear' amount specified for the future voyage hv wear amount specification means 116. ffiOfifel An example of a pre-determined condition under lyhich the appropriate state specification meansisto ho used to specify the appropriate state is the Condition that the total:'wdne of the cost of fuel oiktfee cost of cylinder lubricant, and costs accompanying the replacement of the cylinder liner are less than or equal to a predetermined thresholtl. or theeondxtion ^at:t^:|o|i^/valuo:is at its minimum, Thrminalapparafus 11 displays the appropriate state specified by the appropriate state specification means to a crew member of vessel É or the like, for example. The crew member or the like can reduce the costs: accompanying the voyage of vessel 8 by adjusting the voyage speed of vessel 8 and adjostiugthe type of fuel oil to be used, the amount. of cylinder lubricant, and the like, in aceordanee with the appropriate state presented by terminal apparatus 11. 10097] 121 In the above-described embodiment, ^plforle acid condensation intensity Wf is specified by sulfuric acid condensation intensity specification moans 123 based on many pieces of sample data acquired fey sample data acquisition meanld&amp;L Instead of tins, sulfuric acid c on den s ation i nten s it y W: nmv fee determined bv a worker of the company managing vessel 8 or the like, for example; In this case, a worker of the company managing: vessel É or the like determines sulfuric acid condensation intensity Wo based on the eharacteristiCs: theihifihfo Thereafter, the validity of determinedsUlfiitie acid condensation intensity Wp is cheeked with reference to theresulta of analysing the foon confaihed in the cylinder drain oil or the like, and sulfuric acid condensation intensity Wl is corrected as needed. Sulfuric acid condensation intensity Wo determined by a person in this manner may be used fey low-temperature corrosion speed specification means 115 to specify low-temperature corrosion speed GI, [0098] (3) In the above-described embodiment, the sample data used fey sulfuric acid condensation intensity specification means 123 to specify sulfuric acid condensation intensity We inchrdes low "temperatur e eorrosion speed Cl estimated based on the result of analysing iron contained in the cylinder drain oil, for example. The analysis ofthe iron contained in the cylinder drain liquid incurs^ labior and cost. Accordingly acqmsitionofthe needed amount of sample dafada dliieulf in some eases. For this reason, a configuration may be employed in which server apparatus 12 specifies sulfuric acid condensation intensity Wp for an engine for whieha sxrfScient amount of sample data is not obtained based on sulfuric acid condensation intensity Wj. that has already been specified by sulfuric acid condensation; intensity specification means i23iThe above-described embodiment can be modified in various ways within · Thgicope of; ::: the tedhhical idea of the present invention. Examples of these modifications: wtil be given below. Note that two or more modified examples below may be combined, [9092] (1) The aboyevdescrihéd embodimenfe wear amount specification system 1 Specifiesthe Current andpast states of low-temperature corrosionand wear on the cylinder liner. Instead of or in addition to this, it is also possible to employ a configuration in which wear amount, specification IlSlein 1 specifies future states of low-temperature corrosion and wearable cylinder lines I80§3] in this modified example, for example; terminal apparatus 11 iaeiiuires and stores data indicating a future voyage schedule of vessel 8, a type of fuel oil to be used, an amount of cylinder lubricant to be used, and the like. Note that the data such as the voyage schedule of vessel may be input to terminal of vessels, or the like, for example, or terminal apparatus 11 may receive the data from server apparatus f l. Based on the data such as the voyage sehudule of vesse! 8, terminal apparatus:! 1 specifies the engine's load index value in a future voyage of vessel 8, an amount of sulfur contained in the fuel oil to be used, and an amount pf a basic substance contained in the cylinder lubricant to be used and specifics the lo w temperature eormsion speed, mtra-period wear amddhl, and cumulative wear amount based on these speciied pieces of data. Terminal apparatus 11 displays these specified pieces of information to a crew member of vessel or the like, for example. 10094] Also, terminal apparatus 11 may notify the crew member of vessel 8 or the like of the time at which the cumulative wear amount specified as described above reaches a pM ^ determined condition; For example, terminal apparatus 11 specifies the time at which the cumulative wear amount reaches the predeteråfinéd threshdhi value and notifies the crew member of vessel 8 or the like of the specified time as the time at which to replace the cylinder lines [00951 Alao, a configuration may be employed in which term] apparatus 11 includes an appropriate state specification means that specifies a combination of a engine load, a type of fuel oil, an amount of cylinder lubricant; and the like, which satisfies a pretleternu ned condition, as an appropriate state based on the low-temperature corrosion speed specified for the firepower by low-temperature corrosion speed specification means 1.15 or the intra * perio4 wear 'amount specified for the future voyage hv wear amount specification means 116. ffiOfifel An example of a pre-determined condition under the appropriate state specification meansisto ho used to specify the appropriate state is the Condition that the total: 'wdne of the cost of fuel oiktfee cost of cylinder lubricant, and costs accompanying the replacement of the cylinder liner are less than or equal to a predetermined threshold. or theeondxtion ^ at: t ^: | o | i ^ / valuo: is at its minimum, Thrminalapparafus 11 displays the appropriate state specified by the appropriate state specification means to a crew member of vessel É or the like, for example. The crew member or the like can reduce the costs: accompanying the voyage of vessel 8 by adjusting the voyage speed of vessel 8 and adjusting the type of fuel oil to be used, the amount. of cylinder lubricant, and the like, in aceordanee with the appropriate state presented by terminal apparatus 11. 10097] 121 In the above-described embodiment, ^ pleural acid condensation intensity Wf is specified by sulfuric acid condensation intensity specification moans 123 based on many pieces of sample data acquired fey sample data acquisition mean & L Instead of tins, sulfuric acid c on den ation s it y W: nmv fee determined bv a worker of the company managing vessel 8 or the like, for example; In this case, a worker of the company managing: vessel É or the like determines sulfuric acid condensation intensity Wo based on the eharacteristiCs: theihifihfo Thereafter, the validity of determinedsUlfiitie acid condensation intensity Wp is checked with reference to theresulta of analyzing the phone confaihed in the cylinder drain oil or the like, and sulfuric acid condensation intensity Wl is corrected as needed. Sulfuric acid condensation intensity Where determined by a person in this manner may be used fey low-temperature corrosion speed specification means 115 to specify low-temperature corrosion speed GI, (3) In the above-described embodiment, the sample data used fey sulfuric acid condensation intensity specification means 123 to specify sulfuric acid condensation intensity We enter low "temperature eorrosion speed Cl estimated based on the result of analyzing iron contained in the cylinder drain oil, for example. Liquid incurs ^ labior and cost Accordingly acqmsitionofthe required amount of sample dafada dliieulf in some eases For this reason, a configuration may be employed in which server apparatus 12 specifies sulfuric acid condensation intensity Wp for an engine for whieha sxrfScient amount of sample data not obtained based on sulfuric acid condensation intensity W. which has already been specified by sulfuric acid cond ensation; intensity specification means i23i

IfiOlSl In this case? &amp;r each of the various types of engines, sample data acquisition means 121 acquires sample data including sulfuric acid condensation intensity Wp that has already been specified by sulfuric acid condensation intensity specification means 123, and one or more types of characteristic values indicating the , hrmartefistics of theengine (mg-, the shape of the derating mapr the set temperature of a cooling liquid for the cylinder liner, and the like), lilOfil Server apparatus 12 includes a relationship specification means that specifies ihe relationship between the characteristic values of the engine and Sulfuric acid condensation intensity Wp based on many pieces of sample data acquired by sample data acquisition means 121, Specifically based: on the sample data acquired by sample data acquisition means 121. for example, the relationship specification means specifies a relational equation fiir the characteristic values of the engine; and: sulfuric acid condensation intensity Wp U|iiig a known statistical method such as multiple regression analysis in which sulfuric acid condensation intensity is used as a dependent variable and the characteristic values of the engine;: are used as independent variables (explanatory variables).IfiOlSl In this case? &amp; r each of the various types of engines, sample data acquisition means 121 acquires sample data including sulfuric acid condensation intensity Wp which has already been specified by sulfuric acid condensation intensity specification means 123, and one or more types of characteristic values indicating the, hrmartefistics of theengine (mg-, the shape of the derating mapping the set temperature of a cooling liquid for the cylinder liner, and the like), lilOfil Server apparatus 12 includes a relationship specification means that specifies the relationship between the characteristic values of the engine and Sulfuric acid condensation intensity Wp based on many pieces of sample data acquired by sample data acquisition means 121, Specifically based: on the sample data acquired by sample data acquisition means 121. For example, the relationship specification means a relational equation for the characteristic values of the engine; and: sulfuric acid condensation intensity Wp U | iiig a known statistical method such as multiple regression analysis in which sulfuric acid condensation intensity is used as a dependent variable and the characteristic values of the engine ;: are used as independent variables (explanatory variables).

[tilfil] Also, server apparatus 12 includes a characteristic value acquisition means that acquirescharacteristic valnes ofanengineibr which sulfuric: acid condensation intensity W], is unspecified Sidfinbe acid condensation intend# specification means '123 specifics sulfuric acid condensation intensity Wl, which, was anspeeiied^ by snhatitnting: the Characteristic values acquired by the characteristic value acquisition means into the retafiphld function specified by the relationship speeification means.[instance] Also, server apparatus 12 includes a characteristic value acquisition means that acquires characteristic valnes of which sulfuric: acid condensation intensity W] is unspecified Sidfinbe acid condensation intend # specification means' 123 specifics sulfuric acid condensation intensity Wl, which was specified ^ by snhatitnting: the Characteristic values acquired by the characteristic value acquisition means into the retafiphld function specified by the relationship speeification means.

[0102] (4.) In the above described embodiment, sulfuric acid condensation intensity Wi. is provided as a discrete value, instead of thisy SnlfnCie acid condensation intensity may be provided as a continuous yaluc> For example, sulfuric acid condensation intensity specification means 123 of server apparatus 12 may specify a regression equation Wp = f(L) for sulfuric acid condensation intensities Wjo, WPc ,.., and Wioo specified as discrete values. In this case, sulfuric add condensation intensity acquisition means Hi of terminal apparatus 11 calculates sulfuric acid condensation intensity corresponding to load index value L acquired by load index value acquisition means 112 in accordance with Wc-fiL) specified as the regression equation add transfers sulfuric acid condensation intensity: W.t, to low"·temperature corrosion speed specification means 115. filOi (5) In the above-described embodiment, terminal apparatus 11 or server apparatus 12 specifies the low-temperature cqrinston speed add Intra-period wear amount through calculation in accordance with the calculation equation. Instead of Ibis, it is also possible to employ a configuration in which terminal apparatus 11 or server apparatus 12 specifies these values by referring to a correspondence table. 1()104] (6) It is also possible to employ a configuration in which server apparatus 12 performs at least part of the processing performed by terminal apparatus 11 in the above-described embodiment. Also, it is possible to employ a configuration in which terminal apparatus 11 performs at least part of the processing peifemM by server apparatus 12 in the a hoven lerwr ihed embodiment.[0102] (4.) In the above described embodiment, sulfuric acid condensation intensity Wi. is provided as a discrete value, instead of thisy SnlfnCie acid condensation intensity may be provided as a continuous yaluc> For example, sulfuric acid condensation intensity specification means 123 of server apparatus 12 may specify a regression equation Wp = f (L) for sulfuric acid condensation intensities Wjo, WPc, .., and Wioo specified as discrete values. In this case, sulfuric add condensation intensity acquisition means Hi of terminal apparatus 11 calculates sulfuric acid condensation intensity corresponding to load index value L acquired by load index value acquisition means 112 in accordance with Wc-fiL) specified as the regression equation add transfers sulfuric acid condensation intensity: Wt, to low "temperature corrosion speed specification means 115. filOi (5) In the above-described embodiment, terminal apparatus 11 or server apparatus 12 specifies the low-temperature cqrinston speed add Intra-period wear amount through calculation in Instead of Ibis, it is also possible to employ a configuration in which terminal apparatus 11 or server apparatus 12 specifies these values by referring to a correspondence table.1 () 104] (6) It is also possible to employ a configuration in which server apparatus 12 performs at least part of the processing performed by terminal apparatus 11 in the above- described embodiment. Also, it is possible to employ a configuration in which terminal apparatus 11 performs at least part of the processing peifemM by server apparatus 12 in a highly embodied embodiment.

[0105] (7) In the abovmdeseribed embodiment, ter33^yi;i:ag^mé®Si It amt server apparatus I2a>t reah/.ed bv general computers executing jproeessing; In accordance with programs. Instead of tins, at least one of terminal app;iratns M and server apparatus 12 may be constituted as a so-called dedicated apparatus, thlOhJ M): In t he above “described embodiment, the program executed by computer 10 to realize terminal apparatus 11 may be downloaded to computer 1.0 via a network such as the Internet;, for example, or may be stored ^permanently in a storage medium, distributed, and loaded to computer 10 from the storage medium. Also, in the above'described embodiment, the1 program executed; bv computer 20 to realize server apparatus 12 may he downloaded to computer 20 via a network such as the Internet, for example, or may be stored permanently toddlÉhii.: distributed, and loadedto computer 20 from the storage medimn.[0105] (7) In the abovemdeseribed embodiment, ter33 ^ yi; i: ag ^ mé®Si The amt server apparatus I2a> t reah / .ed bv general computers executing jproeessing; In accordance with programs. Instead of tins, at least one of terminal app; iratns M and server apparatus 12 may be constituted as a so-called dedicated apparatus, thlOhJ M): In the above described description, the program executed by computer 10 to realize terminal apparatus 11 may be downloaded to computer 1.0 via a network such as the Internet; for example, or may be stored ^ permanently in a storage medium, distributed, and loaded to computer 10 from the storage medium. Also, in the above-described embodiment, the1 program executed; eg computer 20 to realize server apparatus 12 may be downloaded to computer 20 via a network such as the Internet, for example, or may be stored permanently toddlÉhii: distributed, and loadedto computer 20 from the storage media.

Reference Signs List [0107] 1 Wear amount speciheatlbn system 8 Vessel 9 Communication satellite: 10 Computer 11 Terminal apparatus .12; icryer apparatus 13 Terminal appitatiis :20 Computer 101 Memory 1Q2 ProcessorReference Signs List [0107] 1 Wear amount speciheatlbn system 8 Vessel 9 Communication satellite: 10 Computer 11 Terminal apparatus .12; icryer apparatus 13 Terminal appitatiis: 20 Computer 101 Memory 1Q2 Processor

103 Communication IF 104 Display apparatus 1Q§ Operation apparatus 111 Sulfuric acid condensation intensity acquisition means IIS Lead index value acquisition means 11.3 iVtlribute. value acguisitlou means 3.14 Storage means ITS i^wRemperature corrosion speed specification means ilia Wen r a mount speeiiica t ion mea n s 117 transmission, means. 118 Reception mpane 123. Sample data acquisition means 122 Storage means 123 Sulfuric acid condensation intensity specification: means 124 Reception means 12o Transmission means 201 Memory 202 Processor103 Communication IF 104 Display apparatus 1Q§ Operation apparatus 111 Sulfuric acid condensation intensity acquisition means IIS Lead index value acquisition means 11.3 iVtlribute. value acguisitlou means 3.14 Storage means ITS i ^ wRemperature corrosion speed specification means ilia Wen r a mount speeiiica t ion mea n s 117 transmission, means. 118 Reception mpane 123. Sample data acquisition means 122 Storage means 123 Sulfuric acid condensation intensity specification: means 124 Reception means 12o Transmission means 201 Memory 202 Processor

203· O o m m uni c a tio n IF203 · O o m m uni c a tio n IF

Claims (9)

1. An apparatus comprising:
a load index value acquisition means for acquiring a load index value 5 indicating a magnitude of a load of an engine;
an attribute value acquisition means for acquiring an attribute value, which is a sulfuric acid concentration in a cylinder of the engine or at least one value of an attribute Uiat influences the «ultune acid concentration:
a sulfuric acid condensation intensity acquisition means for 10 acquiring a sulfuric acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in the cylinder, corresponding to the load index value: and a low'temperature corrouon speed specifuafion mean. for specifying a low-temperature corrosion index, value indicating an, index for a
15 progression speed of low temperature corrosion in the cylinder, based on the attribute value and. the sulfuric acid condensation. niten«uv
2. : The apparatus according to claim I, comprising a wear amount specification means for specifying a wear amount of a 20 cylinder liner in the cylinder based on the low-temperature corrosion index value.
3, The apparatus according to claim 1, comprising an appropriate state specification means for specifying, as än 25 appropriate state, a combination of the load index value and the attribute value that satisfies a pre-determined condition., based oh tlfo low'temperature corrosion index value.
4, The apparatus according to churn 2, comprising
30 an appropriate state specification means for specifying, as an
SS
DK 2018 00086 A1 appropriate etafe, a combination of the load index valne and the attribute value that satisfies a pre’determined condition,based on the wear;amount,
5, The apparatus according to any one of claims 1 to 4, wherein
5 the attribute value acquisition means acquires an amount of sulfur contained in fuel oil used in the engine as the attribute value,
6, The apparatus according to anv one of claims 1 to 5, wherein the attribute value acquisitum means acquires an amount of a basic 10 substance contained in cylinder lubricant used in the engine as the attribute value.
1, An apparatus comprising:
ά sample data acquisition means for acquiring a plurality of pieces of 15 sample data that Indicates a load index value indicating a magnitude of a load of an engine, an attribute value, which is a sulfuric acid concentration in ä cylinder of the engine or at least one value of an attribute that influences the sulfuric acid concentration, and an index value for a progression ^peed of low-tempeiature corrosion in a eyliuder with a sulfuric acid concentration
20 corresponding to the attribute value of the engine running at a load corresponding to the load index value! and a sulfuric acid condensation intensity specification means for specifying a sulfuric acid condensation intensity, which is an index value corresponding to a load index value and indicates a likelihood of occurrence
25 of condensation of sulfuric acid in the cylinder, based on a plurality of pieces of sample data acquired by the sample data acquisition means.
M. An apparatus comprising:
a sample data acquisition means for, for each of a plurality of engines
30 with different characteristics, acquiring sample data including a
DK 2018 00086 A1 characteristic value indicating: a characteristic/of the engine,, and a sulfuric acid condensation: intensity indicating a likelihood of occurrence:; of condensation of sulfuric acid in a cylinder corresponding to a load index value indicating a magnitude of a load of the engine: and
5 a relationship specification means for specifying a relationship between the characteristic value and the sulfuric acid condensation intensity, based on a plurality of pieces of sample data acquired by the sample data acquisition means:
10 9. program for causing a computer to execute:
processing for acquiring a load index value indicating a magnitude of a load of an engine!
processing for acquiring an attribute value, which is a sulfuric acid cuneemrntiou in a cylinder of the engnie or at least one value of an attribute
15 that influences the sulfuric acid concentration:
processing for acquiring a sulfuric acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in the eyhnder corresponding to the load index values, and processing for specifying an index value for a progression speed of
20 low-temperature corrosion in the cylinder based on the attribute value and the sulfuric acid condensation intensity,
1Ö, A program for causing a computer to execute:
processing lor acquiring a plurality of pieces of sample data that
25 indicates a load index value indicating a magnitude of a load of an engine, an attribute value, which is a sulfuric acid concentration in a cylinder of the engine or at least one value of an attribute that influences the sulfuric acid concentration,, and an index value for a progression speed of low-tempera ture corrosion in a cylinder with a sulfuric acid concentration corresponding to
30 the attribute value of the engine running at a load corresponding to the load
DK 2018 00086 A1 index value? and processing for specifying a sulfuric acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in the cylinder, corresponding to a load index value, based on the plurality of pieces a of sample data,
11, A program for causing a computer to execute:
processing for, for each of a plurality of engines with different characteristic^, acquiring sample data -ncluding a characterisin' value
10 indicating a characteristic of the engine, and a sulfuric acid condensation intensity indicating a likelihood of occurrence of condensation of sulfuric acid in a cylinder, corresponding to a load index value indicating a magnitude of a load of the engine: and processing for specifying a relationship between the characteristic
15 value and the sulfuric acid condensation intensity based on the plurality of pieces of sample data,
12, A computer-readable storage medium permanently storing the program according io any one of claims Pio 11,
DK 2018 00086 A1
1/5
COMPUTER
F/G 3
DK 2018 00086 A1
SULFURIC ACID CONDENSATION INTENSITY ACQUISITION MEANS
LOHEKRATURE CORROSION SPEED
T15
TERMINAL APPARATUS
112
114
TRANSMISSION
LOAD INDEX VALUE ACQUISITION MEANS
117
ATTRIBUTE VALUE ACQUISITION MEANS
WAR AMOUNT
SPECIFICATION
MEANS
XL
RECEPTION
MEANS
F/G. 4
ID , XXXX
LOAD INDEX VALUE 10% SULFURIC ACID CONDENSATION INTENSITY W,o 20% W20 « : * . ♦ » « 100% W-JQ0
PISTON POSITION IN CYLINDER
F/G. 3
DK 2018 00086 A1 a/s
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