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1、轮机工程导论论文（Introductiontomarineengineering）Thecharacteristicsoftheinternalcombustionenginearethatthefuelisburnedinthecylinder,andthegasgenerateddirectlydrivesthepistontodothework.Here'sanillustrationofagasolineengine.Atthebeginning,thepistonmovesdownward,theintakevalve
2、opens,theexhaustvalvecloses,andthemixtureofgasolineandairentersthecylinder.Whenthepistonreachestheminimumposition,itchangesthedirectionofmovementandmovesupward.Atthistime,theintakeandexhaustvalveisclosed,andthegasinthecylinderiscompressed.Attheendofcompression,thespa
3、rkplugignitesthefuelgas.Thegasgeneratedbythecombustionoffuelexpandsinthecylinderandpushesthepistondownwardtodothework.Whenthepistongoesupagain,theintakevalveisclosed,theexhaustvalveisopened,andthefluegasisdischargedintotheatmosphereaftertheworkdone.Repeattheabovecomp
4、ression,combustion,expansion,exhaustandotherprocesses,cyclecycle,thechemicalenergyoffuelwillbeconvertedintoheatenergy,andthenconvertedtomechanicalenergyInternalcombustionengine(internalcombustionengine)isakindofheatenginewhichconvertsliquidorgasfuelandairdirectlyinto
5、theenginetogenerateheatenergyandthenconvertitintomechanicalenergy.Theinternalcombustionenginehasthecharacteristicsofsmallsize,smallmass,easytomove,highthermalefficiencyandgoodstartingperformance.Butinternalcombustionenginesgenerallyusepetroleumfuels,whiletheexhaustga
6、sescontainhigherlevelsofharmfulgases.Themaintenanceandmanagementofmarineengineeringistheshipengineroomandelectricpowerautomationequipment,whichisresponsiblefortheshipmainengineatsea,dieselengine,shippowerstation,steeringgear,windlass,mooringwinch,crane,shipairconditi
7、oning,refrigerator,boiler,oilprocessingequipment,dailymaintenance,equipmentmonitoringsystemforlightandsoonrepairwork,etc..ThemarineengineeringofWuhanUniversityofTechnologyisthisaspect,itisaveritablewaterprofessional,landcalledenergy,powerandautomation.Thecoursesarest
8、illthesame,butthemarineengineeringtopasshicend(onlytestthree,testsevenelsewhere)tograduate,evenifnotonboard,butalsoagreatspaceforde
