This paper is focused on upgrading a unified parametric model, available in the literature, that can perform both the analysis and the design of Power-Split Continuously Variable Transmissions (PS-CVTs), which are particularly promising to deploy in the hybrid electric powertrain. In particular, this work is focused on the analysis of PS-CVTs and proposes a new matrix approach for identifying the basic functional parameters underlying the model from the constructive layout of the transmission. This new method does not rely on a case-specific formulation, thus befits any power-split transmission, regardless of the number of planetary and ordinary gear sets and their constructive arrangement. Moreover, it handles the clutches operations that perform the shift between different constructive layouts, therefore it is suitable even for multimode PS-CVTs.

As a case study, we applied it to the complex multimode PS-CVT of the Cadillac CT6 and carried out a comprehensive analysis of its kinematics, mechanical power losses and power flows.

本文着重于对文献中可用的统一参数模型进行升级，该模型可以执行功率分配无级变速箱（PS-CVT）的分析和设计，这在混合动力总成中尤为有希望。特别地，这项工作着重于PS-CVT的分析，并提出了一种新的矩阵方法，用于从变速器的建设性布局中识别出该模型基础的基本功能参数。这种新方法不依赖于具体情况，因此适用于任何动力分配变速器，而与行星齿轮组和普通齿轮组的数量及其结构布置无关。此外，它可以处理执行不同结构布局之间转换的离合器操作，因此，它甚至适用于多模式PS-CVT。

作为案例研究，我们将其应用于凯迪拉克CT6的复杂多模PS-CVT，并对其运动学，机械功率损耗和功率流进行了全面分析。