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通过动力装置电气化改善车辆燃油经济性,是满足严格的燃油经济性法规的1项关键技术。但是,仅有少量的诸如B级小型车辆采用了电动装置,这是因为燃油经济性的提高相对于成本增加十分有限,而且还需额外增加电动装置的安装空间。研究了适合于小型车辆的强混合系统的最佳解决方案。首先,从能量效率最大化方面,比较了不同驱动模式中发动机效率和变速器效率分配,并为小型车辆选择了合适的自动变速器。比较混合动力系统功能时,确定了电动发电机连接方式,以及为同时满足燃油经济性和驾驶性能的电动机输出功率。此外,为实现换档过程中扭矩无中断和相对传统手动变速器较短的轴长,设计了电动发电机和变速器档位布置。开发了机械自动变速混合系统原型机和试验用车。最后介绍了能够实现扭矩无中断、灵活驾驶性能的换档顺序,及其在车辆上应用的评估结果。
Electrification of power plants to improve vehicle fuel economy is a key technology to meet stringent fuel economy regulations. However, only a small number of small vehicles, such as Class B, use electric devices due to the limited fuel economy increase relative to cost and additional installation space for electric devices. The best solution for a strong hybrid system suitable for small vehicles is studied. First, engine efficiency and transmission efficiency distribution in different driving modes are compared in terms of energy efficiency maximization, and a suitable automatic transmission is selected for small vehicles. When comparing hybrid system functions, the motor generator connection and the motor output power for both fuel economy and drivability were determined. In addition, the motor and transmission gear arrangements were designed to provide uninterrupted torque transfer and shorter shaft lengths relative to conventional manual transmissions. Developed mechanical automatic transmission hybrid prototype and test car. Finally, the order of gearshift that can achieve torque non-stop and flexible driving performance is introduced, and the appraisal result of its application in the vehicle is presented.