Dampers with torque limiters (DTLs) are widely used components in hybrid powertrain systems because they can effectively mitigate torsional vibration problems. In this paper, a multiple-degree-of-freedom (multi-DOF) powertrain bond graph modeling method is proposed to optimize the torsional characteristics of a DTL in a compound planetary set power-split hybrid electric vehicle (HEV). First, the structure and characteristics of a hybrid powertrain system and DTL were analyzed. Based on the bond graph principle, a 10-DOF dynamic model of the powertrain for the power-split HEV was established. This model precisely represents the torsional vibration phenomena experienced by the powertrain under idling and acceleration conditions. After investigating the impacts of the torsional characteristic parameters of the DTL on the torsional vibration under idling and acceleration conditions, an optimization scheme for the DTL was developed. Finally, the results of real vehicle tests demonstrate that the optimized DTL exhibited a vibration attenuation performance improvement over the pre-optimized DTL of more than 60%; this result validates the effectiveness of the proposed optimization scheme.

中文翻译：

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基于多自由度动力总成键合图建模的混合动力汽车带扭矩限制器的阻尼器扭转特性优化


带有扭矩限制器 (DTL) 的阻尼器是混合动力系统中广泛使用的组件，因为它们可以有效缓解扭转振动问题。本文提出了一种多自由度（multi-DOF）动力总成键合图建模方法，用于优化复合行星组功率分流混合动力电动汽车（HEV）中 DTL 的扭转特性。首先，分析了混合动力总成系统和DTL的结构和特点。基于键合图原理，建立了功率分流混合动力汽车动力总成十自由度动力学模型。该模型精确地反映了动力总成在怠速和加速条件下所经历的扭转振动现象。在研究了DTL扭转特性参数对怠速和加速工况下扭转振动的影响后，制定了DTL的优化方案。最后，实车测试结果表明，优化后的DTL比优化前的DTL减振性能提升了60%以上；该结果验证了所提出的优化方案的有效性。