【作者】 李起忠；

【导师】 刘凯； 周春国；

【作者基本信息】 西安理工大学 ， 机械设计及理论， 2007， 硕士

【摘要】 本文以帕萨特SVW7183AGi型轿车为原型车,将其改装为混合动力电动汽车。本文做了混合动力电动汽车的传动系统选型、传动系统建模与仿真以及系统效率的研究。混合动力电动汽车的传动系统结构分为串联式、并联式和混联式三种类型,根据三种类型的优缺点并结合原型车的参数,选择并联式作为本文所选的驱动结构,根据原型车的参数确定了发动机和电动机的类型和参数。根据传动系统的选型,建立了传动系统的数学模型,其核心是一个行星轮系结构的动力匹配系统,由数学模型,在SolidWorks里建立了动力匹配系统的三维模型,并模拟了不同工况下动力匹配系统的运动。本文运用虚拟样机技术来进行传动系统的仿真分析,并选用ADAMS软件作为虚拟样机分析软件。把SolidWorks三维模型导入ADAMS,在汽车加速、稳定运行、制动减速以及FUD72这四种工况下,进行输入输出转速的仿真,并对结果进行了分析解读。仿真结果反映了在各工况下两个动力源的转速匹配情况。本文分析了并联式混合动力电动汽车在不同工况下的纵向动力学方程;研究了混合动力电动汽车的节油机理;指出了循环工况和控制策略可以影响汽车的系统效率;提出了混合率的概念,混合率代表了电动机输出功率和发动机输出功率的比值,它的变化对系统的效率有很大的影响,本文推导出了系统效率和混合率及传动比的关系函数。更多还原

【Abstract】 The car of Passat SVW7183AGi is taken as the prototype vehicle, and is transformed to a parallel hybrid electric vehicle (PHEV), in this paper, choice of the car’s drivetrain is made, the transmission is modeled and simulated and the research on the system’s efficiency is made.Drivetrain of hybrid electric vehicle (HEV) have 3 basic configurations: series, parallel and parallel plus series, based on the three kind’s characteristic and the parameter of the prototype car, parallel is chosen as the car’s drivetrain configuration, and the engine and electric motor’s type and parameter is given based on the prototype car’s parameter.The mathematic model of the transmission system is established according to the choice of the drivetrain, the essential part is a power split system using planet gears, and based on the mathematic model, the 3D model is established in SolidWorks, the rotate under different working condition is simulated.Using virtual prototyping technology software ADAMS to simulate the transmission system. 3D model is imported to ADAMS, the simulation and analysis of the 4 working conditions—acceleration, cruises, braking & slowdown and FUD72 is made. The simulation result reflects the matching condition between engine and electric motor.In this paper, the longitudinal dynamics of the PHEV under different working condition is analyzed; a study on fuel-saving mechanism for HEV is made; it points out that cycle working condition and controlling strategy can affect the system efficiency; the concept of hybrid rate is proposed, and the relationship between system efficiency, hybrid rate and transmission rate is educed. The hybrid rate represent the ratio between electric motor’s output power and engine’s output power, it has great influence on the system efficiency.更多还原