工程机械柴油机燃油系供油特性曲线的研究报告VIP专享VIP免费

Engineeringmachinerydieselenginefuelsupplycharacteristiccurveoftheresearch工程机械柴油机燃油系供油特性曲线的研究摘要柴油机本身的速度特性不能满足大多数工程机械特殊工况的要求，因为其扭矩曲线比较平坦，当负载有少量变化时柴油机转速就会有波动，柴油机在低速时会熄火，在高速时会“飞车”。这对柴油机的正常运转不利，因此柴油机需装设调速器，调速器可根据负载的变化，自动调节供油量，从而使柴油机保持在所要求的转速下稳定运转。而研究柴油机燃油系供油特性曲线对认识和改进调速器的性能都有至关重要的意义。首先，通过在喷油泵实验台上进行调试、试验获取数据，进行分析，从而绘制出曲线。然后通过调试燃油系几个主要参数，研究曲线的变化趋势，找出其对柴油机动力性、经济性及尾气排放的影响。提出改进方案，在转速不变的情况下，改变齿条行程，从而节省燃料。最后对新特性曲线进行可靠性分析。关键字：调速器调速特性曲线喷油泵转速齿条行程调速螺钉AbstractThespeedoftheengineitselfcannotmeetthecharacteristicsoftherequirementsofthemostengineeringmachinery,becausethetorquecurvesarerelativelyflat,whenloadchangewithasmallamountofthedieselenginespeedcanbebigfluctuations,dieselengineinlowspeedwillstall,athighspeedgalloping.Thistothenormaloperationofdieselengineisadverse,sodieselengineinstalledgovernorshould,accordingtothechangeofloadofgovernor,automaticadjusttheflowof,soastomakethedieselengineinthespeedoftherequirementstokeepthestableoperation.Andthestudyofdieselenginefuelsupplycharacteristiccurveandimprovetoknowtheperformanceofthegovernorhavecrucialsignificance.First,throughtheexperimentinfuelinjectionpumponcommissioning,testfordata,tocarryontheanalysis,thusrenderingthecurve.Thenthroughthedebuggingmainparametersoffuel,studytheshapeofthecurvetrend,findouttheondieselenginepower,economyandexhaustgasemissioneffects.Putforwardtheimprovementplan,inspeedundertheconditionofinvariable,changeracktrip,thussavingfuel.Thenewcharacteristiccurveinthereliabilityanalysis.Keywords:governorspeedregulationcharacteristicinjectionpumprevolvingspeedracktripspeedadjustmentscrews目录第1章绪论..................................................................................................................11.1课题研究的目的和意义......................................................................................11.2国内外研究现状..................................................................................................11.2.1机械式调速器...............................................................................................21.2.2液压式调速器...............................................................................................21.2.3电子式调速器...............................................................................................31.2.4调速器的发展趋势.......................................................................................51.3论文的主要内容及创新......................................................................................51.3.1论文的主要内容...........................................................................................51.3.2论文的创新...................................................................................................5第2章工程机械柴油机燃油系供油特性曲线的概述..............................................62.1供油特性曲线......................................................................................................62.2供油特性曲线的认识...................................