【作者】 吴伟岸；

【导师】 钱立军；

【作者基本信息】 合肥工业大学 ， 车辆工程， 2005， 硕士

【摘要】 本文首先对国内外混合动力汽车的技术发展现状及电动汽车仿真技术进行了论述,考虑到我国混合动力汽车技术的发展趋势,提出了一种适合我国国情的混合动力汽车动力传动系的结构方案。根据QR-HEV的需求分析,确定采用轻度混合的扭矩合成型并联混合动力结构。在此基础上,分析了整车系统的基本运行工况,给出了运行工况的功率流,并制定了比较合理的多能源控制策略。结构方案的完成和控制策略的制定为动力传动系参数选择和合理匹配奠定了基础。其次,基于基础性理论分析,在总结相关资料的基础上,提出了混合动力汽车动力系统的参数设计方法,利用此方法对QR-HEV汽车的动力系统参数进行匹配分析。以QR-HEV动力传动系参数的设计为例,在仿真软件ADVISOR2002平台上验证了参数设计方法的合理性。模拟计算结果表明,本文设计的QR-HEV汽车具有与常规汽车相近的动力性能,但对应于UDDS和HWFET循环工况的百公里油耗比常规汽车分别降低了27. 2%和6. 9%。最后,根据混合动力汽车的工作特点提出了动力传动系参数优化匹配问题,并建立了相应的目标函数和约束方程,然后采用序列二次规划法(SQP)来优化目标函数,求出传动系参数的最优解。更多还原

【Abstract】 Firstly, this paper discusses the development actuality of HEV technology and EV simulation technology. Considering the development circumstance of our national HEV technology, a HEV drivetrain configuration which is suitable to the situation of our country is put forward in this thesis. According to the requirement analysis of QR-HEV, a light torque-composing parallel hybrid powertrain configuration is finally adopted. On the basis of this configuration, this paper analyzes fundamental operating mode transitions of overall vehicle system and power distribution, and establishes reasonable control strategy. Accomplishment of drivetrain configuration and establishment of control strategy establish the basic for parameter selection and matching.Secondly, based on the basic theory analysis, the method of parameter design on HEV drivetrain is presented on the basis of summarizing correlative data, and this paper carries on matching analysis of QR-HEV drivetrain parameter by making use of the method. Rationality of method of parameter design is validated on the flat roof of ADVISOR2002 by an example of QR-HEV. The results of simulation calculation indicate that QR-HEV has the same dynamic performances as conventional vehicle, and fuel consumption of UDDS and HWFET driving cycle is decreased by 27.2% and 6.9% compared with conventional vehicle.Finally, according to the working characteristic of HEV, the problem of optimization matching of drivetrain parameter is presented, and this paper builds the corresponding objective function and constraint equation. The objective function is optimized by adopting sequential quadratic programming (SQP), and the optimal results of powertrain parameter are solved.更多还原