The embodiment of the invention provides a trailer protection method and a trailer system of a new energy commercial vehicle, an electric drive and electric control system of the vehicle is self-checked before trailer, and the trailer protection method comprises the following steps: a drive motor controller receives a trailer activation signal and judges whether to enter a trailer self-check mode, and after entering the trailer self-check mode, the drive motor controller drives the trailer activation signal to start the trailer self-check mode; whether the vehicle can be freely dragged or not is judged according to the self-inspection result of the driving motor controller, if the vehicle can be freely dragged, a trailer request instruction is sent to the transmission controller, the transmission controller controls the gear to be shifted to the N gear and waits for trailer, and if the vehicle cannot be freely dragged, the trailer request instruction is sent to the transmission controller; and if not, sending an instruction that the vehicle cannot be freely dragged to a vehicle controller and reporting the instruction to a vehicle instrument. When the new energy commercial vehicle is towed, the situation that the vehicle is towed freely in a fault state, and consequently an electric drive system is damaged can be avoided.
本发明实施例提供了一种新能源商用车的拖车保护方法和拖车系统,在拖车前对车辆的电驱电控系统进行自检,拖车保护方法包括驱动电机控制器接收到拖车激活信号,并判定是否进入拖车自检模式,在进入拖车自检模式后,根据驱动电机控制器的自检结果判定车辆是否可以被自由拖行,若判定可自由拖行,则向变速器控制器发送拖车请求指令,变速器控制器控制挡位挂到N挡,等待拖车,若判断为不可以自由拖行,则向整车控制器发送不能自由拖行指令并报送整车仪表。在新能源商用车拖车时,可以避免车辆在故障状态下被自由拖行对电驱系统造成的损坏。
Trailer protection method and trailer system of new energy commercial vehicle
一种新能源商用车的拖车保护方法和拖车系统
2025-03-21
Patent
Electronic Resource
Chinese
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