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ID:23616984
大小:2.31 MB
页数:66页
时间:2018-11-09
《中置客车发动机进排气系统性能优化及试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AbstractInordertomeetthecomfortandincreasinglystrictnoiseregulationsofthecar,wemustrealizeeffectivenoisereducationfortheairintakeandexhaustsystemofthecar’Sengine.Howeverthestudyoftheoptimizationforairintakeandexhaustsystemofthecar’Sengineandit’Snoisereducationwere
2、notfull,largelyinfluencetheairintakeandexhaustsystemofthecar’Senginetoelevate.DFA6846MAastheIndependentresearchanddevelopmentnewmodelsofDONGFENGStationwagoncompany’Spassengercars,thenoisewasbigwhenit’Sacceleratingandituptoabove88dB(A)oftheoutsideofthecar,seriously
3、influencethepeoplearoundandtheenvironmentandalsonottoreachtherequestofNationalregulationswhichpointthatifthenoisewasmorethan76dB(A)wasnotreachtherequestoftheHigh.1evelbuses.Astheairintakeandexhaustsystemofthecar’Senginewasthemainsourseofthenoise,wemusttakesomemeas
4、urestoreducethenoiseoftheairintakeandexhaustsystemforthecar’Sengine.Theadvancedelectronicandcomputertechnologyandtherapiddevelopmentofmodernnumericalsimulationdesignmethodinengineeringfieldsuccessfullysolvingpracticalproblemsprovidedanewwayofthinkingforhowtostudyt
5、hevehicleengineintakeandexhaustsystemtoimprovetheoverallperformanceofpassengerengineandinreducingnoisesystem.Therefore,thisarticlewasonthebasisofoptimizetheintakeandexhaustsystemoftheDFA6846MAforthepurposeofimprovingvehicleengineexhaustsystemperformanceandreducing
6、thenoise.Weadopted“Systemarrangement.Modeloptimizationdesign-Experimentalstudy”etc.themethodsoftheoreticalanalysisandexperimentalresearchcombined.Themainjobandinnovationswereasfollows.(1)Pipingacousticstheorywasusedtoanalysisthegenerateofnosieattheaperturesofintak
7、eandexhaustsystem,weproposedtheoptimizationstrategyandprovidedthetheorybasisofhowtoimprovethepowerandtheeconomyofthevehicleandhowtoreducevehicleinandoutside’Snoise.(2)GT-powermodeloftheengine’sairintakesystemwasestablished,analysisthevelocityandthepressureoftheair
8、intakesystem,andgettheinfluencefactorsofemptyfilter’Sstructuralparameterstotheairintakesystem’Sperformance.Experimentresultsshowthatthenoisewasreducedaf
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