电动汽车增程器设计中的关键共性基础问题研究

项目名称： 电动汽车增程器设计中的关键共性基础问题研究

项目编号： No.51506130

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 赵金星

作者单位： 上海理工大学

项目金额： 20万元

中文摘要： 增程式电动汽车结合了传统内燃机和纯电动汽车的优点，是传统汽车向纯电动过渡的最佳方案。本课题针对现有増程发动机难以提高工作效率的主要问题，研究将Atkinson循环发动机用作増程发动机的关键基础问题。首先，在进行功率需求分析和确定发动机结构的基础上，建立发动机热力学和发电机有限元仿真模型。其次，为了提高结构参数和操作变量大范围变化时的工作过程和性能预测准确性，将研究和改进现缸内流动和爆震预测模型。利用发动机和发电机仿真数据训练和得到发动机和发电机的神经网络优化模型，在此基础上研究Atkinson循环发动机的多学科效率影响机理。最后，提出基于神经网络模型的多学科设计优化方法进行发动机和发电机的多学科协同优化和匹配，根据优化结果搭建样机并进行性能实验和模型验证。本课题在发动机的结构设计，缸内流动和爆震预测模型，效率影响机理和多学科优化方法方面的创新研究，将为电动汽车增程器的设计优化提供理论指导。

中文关键词： 电动汽车；增程器；Atkinson循环发动机；效率影响机理；优化方法

英文摘要： Range extended electric vehicle combines the advantages of conventional engine and pure electric driving vehicle, which currently is the best choice of transferring from conventional vehicles to pure electric ones. Considering the critical problem of limited efficiency improvement for existing range extended engines, this project will investigate the important fundamental issues using Atkinson cycle engine as range extended engine for range extended electric vehicle. First, based on the requirement analysis of the vehicle power and overall design of the engine structure, establish the engine thermodynamic and motor finite element simulation models. Second, in order to improve the prediction accuracy of engine working process and performance in the case of a large variety of structure parameters and operating variables, improved knock and flow models will be developed. Neural network optimization models for the engine and generator will be trained and obtained based on simulation results from the engine thermodynamic and motor finite element models. The efficiency effect mechanism of Atkinson cycle engine will be studied based on the artificial neural network models. Finally, a multi-disciplinary design optimization methodology based on artificial neural network models will be proposed. This method is then used to perform the multi-disciplinary coordination optimization and matching for the engine and generator. According to the optimization results of the range extender, a prototype engine and generator system will be set up. Real experiments will be carried out to study the performance of the range extender and to validate theoretical models. This novel research in the areas of engine overall structure design, engine knock and flow prediction models, engine efficiency effect mechanism, and multi-disciplinary optimization methodology, will provide theoretical guidance for the design and optimization of range extender used by electric vehicle.

英文关键词： electric vehicle;range extender;Atkinson cycle engine;efficiency effect mechanism;optimization methodology