柴油机设计与制造DesignandManufactureofDieselEngine2023年第2期第29卷（总第183期）~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~工艺与材料国六轻型柴油车尿素箱总成的结构优化与验证兰通仁（厦门环境保护机动车污染控制技术中心，福建厦门361023）摘要：从降低制造成本、减少安装工时、结构轻量化角度出发，对符合国六排放标准的轻型柴油车尿素箱总成进行结构优化及验证。将尿素箱结构从分体式优化为一体式，并利用有限元软件对优化设计方案进行应力分析，根据分析结果选择最优方案。将采用最优方案生产的样件装配于实车上，进行等效于20万km的强化路面耐久可靠性测试。结果表明：优化后的一体式尿素箱在满足结构强度和耐久可靠性的前提下，不仅可以实现结构轻量化，而且可以减少安装工时和降低制造成本。该优化设计可以为柴油机后处理系统的可靠性设计提供参考。关键词：尿素箱；一体式；有限元分析；耐久可靠性StructureoptimizationandverificationoftheureaboxassemblyofaChina-ⅥlightdieselvehicleLANTongren（XiamenEnvironmentProtectionVehicleEmissionControlTechnologyCenter，Xiamen361023，Fujian，China）Abstract：Fromtheperspectiveofreducingmanufacturingcosts，reducinginstallationhoursandlightweight，thestructureoptimizationandverificationoftheureaboxofaChina-Ⅵlightdieselvehiclewascarriedout.Theureaboxstructurewasoptimizedfromsplittointegratedstructure，andthestressanalysisoftheoptimizeddesignschemewassimulatedbyfiniteelementsoftware，andthebestschemewasselectedbasedontheanalysisresults.Thedurabilityandreliabilityofthebestschemesampleontherealvehiclewasverified.Thesampleproducedbythebestschemewasassembledonarealvehicleandsubjectedtodurabilityandreliabilitytestingofthereinforcedpavementequivalentto200000km.Theresultsshowthattheoptimizedintegratedureaboxnotonlyachieveslightweightbutalsoachievesthegoalofreducinginstallationhoursandproductioncostsunderthepremiseofmeetingtherequirementsofstructuralstrength，durabilityandreli⁃ability.Itcanprovidereferenceforthereliabilitydesignforthesubsequentpost-processingsystem.Keywords：ureabox；integrated；finiteelementsimulation；durabilityandreliabilityDOI：10.3969/j.issn.1671-0614.2023.02.0090前...
