某混合动力汽车单排双行星轮动力耦合装置及控制策略研究

【作者】 王立平；

【导师】 李守成；

【作者基本信息】 南京理工大学 ， 车辆工程， 2012， 硕士

【摘要】 汽车作为20世纪最伟大的发明之一,给人们的生活带来了巨大的改变。然而,有时科学也是一把“双刃剑”,能源危机和环境恶化的不断加剧,迫使人们寻求未来汽车的出路。混合动力汽车由于继承了传统汽车成熟的技术,又具备电动汽车节能、环保的优势,成为现阶段的研究重点之一。通过动力耦合装置和控制策略的良好结合,可以克服传统汽车的缺点实现低排放、低油耗,又可以克服电动汽车的不足,具有与传统汽车相当的性价比,是目前最切实可行、可批量生产的节能、环保汽车。本文研究一种基于单排双行星机构的动力耦合装置,既可以实现转速耦合,又可以实现转矩耦合。作为混联式混合动力汽车的动力耦合装置,可以根据车况合理、高效的分配发动机与电机的动力,实现最佳的动力性、经济性以及排放特性。本文根据混合动力汽车对动力耦合装置的功能要求,在选型的基础上设计该动力耦合装置的基本参数。深入分析动力耦合装置的传动效率以及整车动力系统的效率特性,建立匹配该动力耦合装置的混合动力汽车的整车效率模型。以整车传递效率为目标,结合非线性最优化方法—序列二次规划方法对其进行优化分析,得到效率最佳时的动力部件的工况,即其最优工况。以优化得到的最优工况为参考,提出效率优先整车控制策略,并通过仿真验证其有效性。最后通过试验,验证该单排双行星动力耦合装置及整车效率优先控制策略的基本性能和其应用于混合动力汽车的适用性等。本文对基于行星机构的动力耦合装置及效率优先控制策略进行的研究,仅为以后开发、设计性能更高的动力耦合装置提供参考。更多还原

【Abstract】 Our life has changed tremendously by the car, as one of the greatest inventions in the twentieth Century. However, science is a "double-edged sword" sometimes. Our life space is extending over years, but our resource and environment are becoming worse and worse at the same time, we begin to think about the future of our car. Hybrid Electric Vehicle (HEV) inherits traditional technology, and also has potentials in energy-saving and environment-protecting, has become one hotspot all over the world. HEV can overcome not only traditional shortcomings but also electric vehicle’s deficiencies. It will realize lower and lower fuel consumption and emission through good combination between power coupling device and control strategies. Its cost performance is also comparable with traditional vehicle. As a word, HEV is the most practical energy-saving and environment-protecting vehicle currently.One type of power coupling devices based on single row double planetary gear mechanism is studied in the paper. It can realize speed coupling and torque coupling. The HEV matched it will realize the best performance roundly, because it can allocate power between engine and motor efficiently according to real condition.It has much work to do in the paper. Firstly, the type of planetary gear is need selected and basic parameters should be designed based on functional requirement. Secondly, the efficiency of power coupling device and whole power system is all need studied, so efficiency mode of the system is established. Thirdly, the mode should be optimized by Sequential Quadratic Programming method (SQP), so the best power condition when achieves to the maximum efficiency is got. Fourthly, a new control strategy based on the efficiency optimize is proposed and checked with Cruise. Finally, the performance of power coupling device and control strategy is checked by test.The research here only provides some reference for designing the better power coupling device in the future.更多还原