汽车工程 ›› 2023, Vol. 45 ›› Issue (1): 157-168.doi: 10.19562/j.chinasae.qcgc.2023.01.018

所属专题: 新能源汽车技术-电驱动&能量管理2023年

• • 上一篇    

混动专用变速器电机输入轴断裂问题分析解决

袁秋华1,胡军峰1(),阮刘明1,李勤华1,陈敏治1,邓晓龙1,汤天宝1,刘文强1,2   

  1. 1.宁波吉利罗佑发动机零部件有限公司,宁波  315460
    2.清华大学,北京  100084
  • 收稿日期:2022-07-17 修回日期:2022-08-16 出版日期:2023-01-25 发布日期:2023-01-18
  • 通讯作者: 胡军峰 E-mail:hujunfeng@geely.com

Analysis and Solution of Motor Input Shaft Fracture of Dedicated Hybrid Transmission

Qiuhua Yuan1,Junfeng Hu1(),Liuming Ruan1,Qinhua Li1,Minzhi Chen1,Xiaolong Deng1,Tianbao Tang1,Wenqiang Liu1,2   

  1. 1.Ningbo Geely Royal Engine Components Co. ,Ltd. ,Ningbo  315460
    2.Tsinghua University,Beijing  100084
  • Received:2022-07-17 Revised:2022-08-16 Online:2023-01-25 Published:2023-01-18
  • Contact: Junfeng Hu E-mail:hujunfeng@geely.com

摘要:

某型号混合动力专用变速器在动总台架及整车试验过程中发生P1电机输入轴断裂的问题,在排除电机输入轴本身强度问题的基础上,首次发现在P1电机连续短时起动发动机过程中存在双质量飞轮(DMF)的共振并圈现象。在此基础上,建立一维动力学仿真模型,验证了双质量飞轮的共振并圈现象,发现该现象导致电机输入轴产生的转矩为正常起动过程中转矩的5~6倍。最后提出一种优化起动过程的控制策略,解决了双质量飞轮的共振并圈,进而解决电机输入轴的断裂问题,同时也优化了整车起动过程的NVH性能。这为混合动力系统开发过程中类似问题的解决提供了一种新的思路,具有很强的指导意义和工程价值。

关键词: 混合动力变速器, 输入轴断裂, P1电机, 双质量飞轮(DMF), 共振

Abstract:

A type of dedicated hybrid transmission P1 motor input shaft fracture occurs during bench and vehicle test process, on the basis of excluding the strength problem of the motor input shaft itself, overload collision phenomenon of dual mass flywheel (DMF) caused by system resonance is found during continuous short time engine startup process assisted by P1 motor. Based on this, one-dimensional dynamic simulation model is established and overload collision of DMF caused by system resonance is verified. It is found that the torque of motor input shaft is 5-6 times compared with that of the normal engine startup process due to system resonance. Finally, the optimized control strategy is proposed to solve the resonance and overload collision problem of the dual mass flywheel during the engine startup process, and then the fracture problem of motor input shaft is solved, and the NVH performance of the vehicle during engine startup is improved as well. It provides a new idea for similar problem solving in the development process of hybrid power-train system, which has strong instructive and engineering value.

Key words: dedicated hybrid transmission, input shaft fracture, P1 motor, dual mass flywheel (DMF), resonance