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1、附录AExhaustSystemExhaustsystemfromthecombustionchamberventconnectedviaexhaustmanifold,exhaust,andtothemiddle,isthewholeparagraphtailpipeemissionsprocess,automobileexhaustsystemmainlyafunction,oneisthehotfluegasfuelafterburningleadtothecarortoavoidcarsideeduction,influencingi
2、nterioroccupant;itisusingsilencerswillemissionsinhightemperatureandpressureintheprocessofnoisedroppedtotheallowablelimit.Emissionsintheprocessofexhaustmanifoldisfirstencounter.Exhaustmanifolddesignonthemostimportantistoavoidbetweeneachcylinderoftheexhaustgasinterference,mak
3、eeachotherasmuchaspossiblefromtheexhaustpipecompletely,theroleofthemiddleitselfwillcomefromrelativelysimple,aslongastheexhaustgasexhaustmanifoldguidetoexhaustthetailpipe,someexhaustsysteminthemiddletoinstallamoreexpansiveroomtoreduceexhaustpressure;Becauseofthehightemperatu
4、reandhighpressureinsideengineexhaustmanifoldintothewastegaspressureremainedhigh,atthistimewhenforexposuretoexhaustmanifoldwallandwillproduceshock,itappearsthefrequencyofthousandsoftimesperminute,quitehighfrequencyannoyingnoise,soneedgoodaddprocessing.Whentheexhaustafterexha
5、ustmanifoldlater,itsshockwavesfromSeattlealreadyreducedtoeventhelowdissipationtraversedtheshock,butatthemomentthenoiseisstilllarge,lightthemidwaytoreduceitsafterpipinginthemiddle,sopowerfulandparagraphplaceshouldaddturgorzhangchamberandmufflertooffsetitspower,somevent-pipea
6、mufflerdesignonlyparagraph,somecaninamoreexpansiveroominthemiddle,mufflerandexpansionchamber,thedifferencebetweensimilarmufflerinternalhavemultilayerclapboardorporousdirectpipelinetoabsorbsoundvelocity,andspreadreduceexpansionChamberssimplyahollowlargecontainers,itspurposei
7、spurelandtoreducepressuretoexhaustexpansion,soonemoreexpansiveroomdesigncanmakenoiseisreducedmany.附录B捷达汽车排气装置实验台使用说明及注意事项在使用本实验台前，请仔细阅读实验台使用说明及注意事项，按照规范操作，防止损坏实验台或对实验人员人身伤害。一、实验台使用说明1.电源连接将电瓶正负极线分别连接，先负后正。将开关钥匙打到ON位置，实验台启动。2.点火开关将开关钥匙打到ON位置，实验台启动。开关旋至OFF位置时，实验台停转。3.消声器更换用于更
8、换不同车型的消声器来进行测试时，要注意旋转开关到OFF位置，使实验台转后，在更换不同型号的消声器。二、注意事项1.实验台使用的电源有12V蓄电池直流电源，请勿使用不
