TheStudyaboutPistonPinNoiseofFullFloatingSystemintheInternalCombustionEngine

TheStudyaboutPistonPinNoiseofFullFloatingSystemintheInternalCombustionEngine.pdf
Thisstudyaimsatthemechanismofpistonpinnoiseoffullfloatingsystemandresolvingthepistonpinnoiseproblemathotidlecondition.Thepistonpinnoisesoundsliketickingnoise,andgeneratesbythecollisionbetweenthepistonpinandconnectingrodwhenworkingatbigclearance.Thenoiseisannoyedandunacceptable.TheNVH(NoiseVibrationandHarshness)measurementre-sultsshowtherangeofpistonpinnoisefrequencyisrangefrom1500Hzto4000Hz.Whencrankruntwocircles,thereisonetimetickingnoise.Thetickingnoiseoccursataround30deg.afterTDCofexhauststroke.Then,multibodydynamicsanalysisandcenterorbitofpis-tonpinsimulationareusedtorevealthemechanismofpistonpinnoiseoffullfloatingsystem.BydominatingtheNVHtestingandCAEmethods,therelationshipbetweenthetickingnoiseandtheclearanceofpistonpinandconnectingrodisobtained,andtheheatdistor-tionofconnectingrodcanbesimulationwhenhot.Thetickingnoiseismoreclearlywithmoreclearancebetweenpistonpinandconnect-ingrod.Thetickingnoiseshowsstrongdependenceonthedistortionofconnectionrod.Buttherearesomelimitationsofthisstudy,forexample,thevibrationsensorscannotbeinstalledonthesurfaceofpistonpinortheconnectingrodbecauseofthehightemperatureandhighrotatingspeed,therefore,wecannotgetthevibrationcausedbythepincollidingwithconnectingroddirectly.So,inthispaperwewilltesttheaccelerationontheengineblockforanalyzingthecollision.AndwecanestimatethepistonpinmovementbehavedbyCAEanalysis.Inthisstudy,twomainproposalsareresearchedtodecreasepistonpinnoiseathotidlecondition,oneisreducetheclearanceofpistonpinandconnectingrod,anotheroneisincreasethestiffnessofconnectingrod.
作者：LiuBo TangChaoyang ZhanZhangsong YangJincai LiXiaofeng GuQingwei LiuGang
作者单位：ChanganAutomobileCo.,Ltd.PowertrainGlobalR&DCenterinChanganAutomobileCo.,Ltd.
母体文献：第19届亚太汽车工程年会暨2017中国汽车工程学会年会论文集
会议名称：第19届亚太汽车工程年会暨2017中国汽车工程学会年会  
会议时间：2017年10月24日
会议地点：上海
主办单位：中国汽车工程学会
语种：chi
分类号：
关键词：NVH  tickingnoise  waveletanalysis  multibodydynamics  EHDAnalysis
在线出版日期：2020年7月9日
基金项目：
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