System and method for operating transmission having auxiliary pump in power limiting mode

Systems and methods for operating a transmission having an auxiliary pump in a power limiting mode are provided. A vehicle includes an engine and a transmission having an input shaft operably coupled to the engine, an output shaft operably coupled to wheels of the vehicle, a main pump, and an auxiliary pump. The main pump and the auxiliary pump are each configured to supply pressurized fluid to a valve body of the transmission. A controller is programmed to shift the transmission to a neutral state in response to a loss of pressure of the main pump and a rotational speed of the output shaft exceeding a first threshold, energize the auxiliary pump once the transmission is in the neutral state, and command the engine to idle. 本公开提供了"用于在动力限制模式下操作具有辅助泵的变速器的系统和方法"。一种车辆包括发动机和变速器，所述变速器具有可操作地联接到所述发动机的输入轴、可操作地联接到所述车辆的车轮的输出轴、主泵和辅助泵。所述主泵和所述辅助泵各自被配置为向所述变速器的阀体供应加压流体。控制器被编程为响应于所述主泵的压力损失和所述输出轴的转速超过第一阈值而将所述变速器换挡到空挡状态，一旦所述变速器处于所述空挡状态就使所述辅助泵通电，并且命令所述发动机达到怠速。