Analysis and design of multi-mode power split hybrid transmission scheme considering mode connection

Xueliang Li, Yanrong Wang, Xinlei Liu, Zengxiong Peng, Shujun Yang
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Abstract

For heavy-duty truck, multi-mode power split hybrid transmission scheme (MPSHTS) has good adaptability. However, the moment of inertia at both ends of the clutch is large. If there is a large speed difference in the clutch engagement process, it will increase clutch wear, engine stall and other problems. This paper proposed a new design method of multi-mode power split hybrid powertrain, which was different from the proof by exhaustion aiming at mode switching without speed difference. It included: the conditions for achieving mode connection without speed difference was obtained based on the lever method for dynamic characteristic analysis. Evaluation index for power split mechanisms that comprehensively considered power source and transmission system was established. Combining the mode connection conditions and the optimized basic configuration, the characteristic of no speed difference could be ensured by adjusting the power coupling mechanism. A multi-mode scheme based on optimized configuration and work mode requirements could be obtained. Finally, parameter matching and simulation verification on the designed scheme was carried out. It suggested that the designed system improved fuel economy by 4.14% compared with the original scheme.
考虑模式连接的多模式功率分流混合传输方案的分析与设计
对于重型卡车而言,多模式动力分流混合传动方案(MPSHTS)具有良好的适应性。但是,离合器两端的惯性矩较大。如果在离合器接合过程中存在较大的速度差,将加剧离合器磨损、发动机熄火等问题。本文提出了一种新的多模式动力分流混合动力系统设计方法,它不同于以无速度差模式切换为目标的穷举法证明。它包括:基于动态特性分析的杠杆法,获得了实现无速度差模式连接的条件。建立了综合考虑动力源和输电系统的功率分配机制评价指标。结合模式连接条件和优化的基本配置,通过调整功率耦合机构确保无速度差异特性。在优化配置和工作模式要求的基础上,获得了多模式方案。最后,对设计方案进行了参数匹配和仿真验证。结果表明,与原方案相比,设计的系统提高了 4.14% 的燃油经济性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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