StudyontheEffectofValveTrainParametersonIncreasingtheVehicleDieselTorqueatLowSpeedCondition

StudyontheEffectofValveTrainParametersonIncreasingtheVehicleDieselTorqueatLowSpeedCondition.pdf
InParametersofvalvetrains,suchascamprofilesandvalvetiming,haveveryimportantinfluenceonpoweroutputandeconomicalefficiencyofinternalcombustionengine.Forincreasingthetorqueofadomestic-produceddieselengineatlowspeedcon-dition,itisanalyzedindetailsthevalvetiming,thestaticanddynamiccharacteristicsofcamprofilesintheoriginalroller-armvalvemechanismsystem.Comparingtheparameterswiththeothersametypedieselengines,threeimprovedprojectsofcamareproposedandcomparedbysimulationmodelwhichhasbeenverifiedbyexperimentaldata.BothcamprofilesofHigh-orderPolynomialFunctionstypeandLow-orderPolynomialCombinationFunctionstypeareappliedtothedesignprocessbyusingtheself-developedcamdesignsoft-ware.Severalfactorsshouldbeconsideredinthedesignprocessofenginevalvetrains,however,amongwhichthevalvetimingandthefullnesscoefficientsofcamprofilesarethemosttwoimportantfactors.Withtheconstraintconditionofthefullnesscoefficientsvalueofcamprofilesmustbebiggerthan0.55andtheminimumvalueofnegativecurvatureradiusmustbebiggerthantheradiusofgrindingwheelusedduringthemanufactureprocess,theprojectofLow-orderPolynomialCombinationFunctionstypeprofilesareselectedtobetheoptimizedone.Throughtheenginetestverificationandvalidation,thetorqueoftheoptimizedengineincreasesover11%andthefu-elconsumptiondecreasesby2.34%atlowspeedcondition.
作者：YuanZhaocheng ChenHaibo QiuSen JinYihe LiuHongtao JuMingjun
作者单位：StateKeyLaboratoryofAutomotiveSimulationandControl,JilinUniversityFAWSihuanEngineManufactureCo.,Ltd.
母体文献：2016中国汽车工程学会年会论文集
会议名称：2016中国汽车工程学会年会  
会议时间：2016年10月26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：highspeeddiesel  camprofiles  valvetiming  torque
在线出版日期：2019年4月25日
基金项目：
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StudyontheEffectofValveTrainParametersonIncreasingtheVehicleDieselTorqueatLowSpeedCondition.pdf

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