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Estimation of torque transmitted by clutch during shifting process for dry dual clutch transmission

机译：干式双离合器变速箱换挡过程中离合器传递的扭矩估算

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摘要

The key toward realizing no-impact gear shifting for dual dutch transmission (DCT) lies in the coordination control between the engine and dual clutches, as well as the accurate closed-loop control of torque transmitted by each clutch and the output torque of the engine. However, the implementation and control precision of closed-loop control are completely dependent on the effective measurement or estimation of the instant transmission torque of the clutch. This study analyzes the DCT shifting process, and builds a three-dimensional (3D) clutch model and mathematical model of a DCT vehicle powertrain system. The torque transmitted by a twin clutch during the upshifting process is estimated by applying the unscented Kalman filter (UKF) algorithm. Then, the torque estimation algorithm is verified using a DCT prototype vehide installed with a torque sensor on the drive half-shaft. The experimental results show that the designed UKF torque estimation algorithm can estimate the transmission torques of two clutches in real time; further, it can be directly used for DCT shift control and improving the shifting quality.
机译：实现双荷兰变速器（DCT）无冲击换挡的关键在于发动机和双离合器之间的协调控制，以及每个离合器传递的扭矩和发动机输出扭矩的精确闭环控制。但是，闭环控制的实现和控制精度完全取决于离合器瞬时传动扭矩的有效测量或估算。本研究分析了DCT换档过程，并建立了DCT车辆动力总成系统的三维（3D）离合器模型和数学模型。通过应用无味卡尔曼滤波器（UKF）算法估算双离合器在升档过程中传递的扭矩。然后，使用在驱动半轴上安装了扭矩传感器的DCT原型车辆验证扭矩估计算法。实验结果表明，所设计的UKF扭矩估算算法可以实时估算两个离合器的传递扭矩。此外，它可以直接用于DCT换档控制并提高换档质量。

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