【作者】 李靖；

【导师】 张云清；

【作者基本信息】 华中科技大学 ， 车辆工程， 2013， 硕士

【摘要】 整车热管理系统包括：发动机冷却系统、润滑系统、进排气系统、空调系统等多个热流系统，整车热管理系统性能可以影响到整车动力性能、燃油经济性能、排放性能和乘坐舒适性能。本文以整车热管理系统中的汽车空调系统和冷却系统为重点研究对象，详细介绍了汽车空调系统和发动机冷却系统的工作原理，基于多领域统一建模语言Modelica建立了可以进行灵活建模和扩展的汽车空调系统模型以及发动机冷却系统的Modelica模型库，并将这两个模型库与整车动力传动模型库结合建立了整车热管理系统，对发动机冷却系统、汽车空调系统和动力传动系统之间的相互耦合关系进行了研究。文章系统地回顾了国内外对于汽车空调系统仿真、冷却系统仿真以及整车热管理系统仿真的研究状况。针对汽车空调系统，结合Modelica语言建模特点，提出了新型的空调系统制冷剂计算模型和一维离散换热器模型，建立了包括蒸发器、冷凝器、压缩机、热力膨胀阀、车厢等元件的空调系统模型库，并利用的制冷剂热力学性能数据和零部件性能试验数据验证了制冷剂模型和换热器等模型具有较高的计算精度。而针对发动机冷却系统，文中建立了包括发动机、散热器、水泵、节温器等元件的冷却系统模型库，搭建了发动机冷却系统模型，并利用试验数据验证了模型具有可信的仿真结果。最后，文章基于以上两个热流模型库，再结合动力传动系统模型库建立了整车热管理系统模型，并进行了车辆在ECE_EUDC_Low循环工况下的整车系统仿真，根据仿真结果对各系统之间相互影响关系进行了简要的分析和总结。更多还原

【Abstract】 Vehicle thermal management system include: engine cooling system, lubricationsystem, intake and exhaust system, air-conditioning system and other thermo flow systemsin the vehicle. The performance of the vehicle thermal management system may affect thevehicle dynamic performance, fuel economy performance and ride comfort performance.This thesis focuses on automotive air-conditioning system and engine cooling systemin the vehicle thermal management system. The working of the air-conditioning systemand cooling system are introduced at first, then, an Automotive Air-Conditioning Modelicamodel library and an Engine Cooling Modelica model library are established based onModelica programming language. These two libraries are used in a vehicle thermalmanagement system simulation together with a Powertrain Modelica model library, inorder to study the coupling relationship among engine cooling system, automotiveair-conditioning system and powertrain system.The article reviews both of domestic and foreign research status of automotiveair-conditioning simulation, cooling system simulation and vehicle thermal managementsystem simulation. And then a new refrigerant thermodynamic calculation model and anovel one-dimensional discrete heat exchanger model for air conditioning system areproposed based on Modelica. These new refrigerant model and heat exchanger model areused to set up a complete Automotive Air-Conditioning Modelica model library includingevaporator, condenser, compressor, thermostatic expansion valve, cabin and othercomponent models. Some of the key component models in the model library are validatedby experimental data. Similarly, an Engine Cooling Modelica model library includingengine, radiator, water pump, thermostat and other componet models is built, and partlyvalidated. Finally, a vehicle thermal management system model including the two thermoflow system and the powertrain system is established. Then a simulation underECE_EUDC_Low condition is taken, and some conclusions about the couplingrelationship among these sub-systems in the thermal management system are givenaccording to the simulation results.更多还原