The invention relates to a motor and torque converter clutch control strategy for an electric drive unit having a motor-driven torque converter. A method for controlling an electric drive unit (EDU) having a motor-driven torque converter includes receiving a request signal indicative of a requested output torque of the EDU and operating a motor at a target motor speed using the requested output torque. The target motor speed minimizes system loss while achieving the requested output torque. A torque converter clutch (TCC) transitions to or remains in a locked state when the requested output torque remains below a calibrated threshold and the turbine speed is less than the angular speed of the motor. The controller commands the TCC to transition to an unlocked state to achieve a target motor speed, thereby selectively achieving torque multiplication. The powertrain system includes a driven load and an EDU. A computer readable storage medium may include executable instructions for executing the method.
本申请涉及用于具有马达驱动的扭矩转换器的电动驱动单元的马达和扭矩转换器离合器控制策略。一种用于控制具有马达驱动的扭矩转换器的电动驱动单元(EDU)的方法包括:接收指示EDU的请求的输出扭矩的请求信号,并且使用请求的输出扭矩以目标马达速度操作马达。目标马达速度在实现请求的输出扭矩的同时使系统损失降到最低。当请求的输出扭矩保持在校准的阈值以下并且涡轮速度小于马达的转角速度时,扭矩转换器离合器(TCC)转变到锁定状态或保持处于锁定状态。控制器命令TCC转变到解锁状态以达到目标马达速度,由此选择性地实现扭矩倍增。动力总成系统包括被驱动负载和EDU。计算机可读存储介质可包括用于执行该方法的可执行指令。
Motor and torque converter clutch control strategy for electric drive unit having motor-driven torque converter
用于具有马达驱动的扭矩转换器的电动驱动单元的马达和扭矩转换器离合器控制策略
2023-06-02
Patent
Electronic Resource
Chinese
European Patent Office | 2023
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