Abstract A novel unilateral Harpoon shift is developed as an alternative for conventional cone-type synchronizers used in electric vehicles equipped with multi-speed clutchless automated manual transmission (CLAMT), aiming to improve the gearbox’s efficiency and performance. Harpoon shift can overcome the drawbacks of traditional synchronizers, including friction loss and wear, and simplify gearshift control. A detailed dynamic model of Harpoon shift is established to investigate the transients of the proposed synchronizer during engagement. Also, an experiment is performed to evaluate the engaging performance of Harpoon shift and validate the effectiveness of the model. Besides, the effects of rotating speed and speed difference on the torsional shock during engagement are analyzed quantitatively. Simulation and experimental results demonstrate distinct advantages of Harpoon shift over the conventional synchronizers.

中文翻译：

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电动汽车单边鱼叉式同步器动力学分析

摘要 开发了一种新型单边鱼叉式换档器，作为传统锥形同步器的替代品，用于配备多速无离合器自动手动变速器（CLAMT）的电动汽车，旨在提高变速箱的效率和性能。鱼叉换档可以克服传统同步器的摩擦损失和磨损等缺点，并简化换档控制。建立了鱼叉换挡的详细动态模型，以研究所提出的同步器在接合期间的瞬态。此外，还进行了实验以评估 Harpoon shift 的接合性能并验证模型的有效性。此外，定量分析了转速和速度差对啮合过程中扭转冲击的影响。