The invention discloses a torque control method and device for switching two-wheel drive to four-wheel drive, and the method comprises the steps: obtaining the current output torque of a synchronous motor, the current output torque of an asynchronous motor and the opening degree of an accelerator in a torque coordination state; according to the accelerator opening degree, the current output torque of the asynchronous motor and the current output torque of the synchronous motor, the torque descending slope of the synchronous motor and the torque ascending slope of the asynchronous motor are determined; and according to the torque descending slope, the torque ascending slope, the current output torque of the asynchronous motor and the current output torque of the synchronous motor, a first request torque sent to the asynchronous motor and a second request torque sent to the synchronous motor are determined respectively so as to control the asynchronous motor and the synchronous motor to operate. Therefore, under the torque coordination state of switching the two-wheel drive to the four-wheel drive, the torque rising slope and the torque falling slope are controlled, so that the torque falling slope and the torque rising slope are kept consistent, and the running smoothness of the vehicle is ensured.
本发明公开一种两驱切换四驱的扭矩控制方法及装置,通过在扭矩协调状态下,获取同步电机的当前输出扭矩、异步电机的当前输出扭矩以及油门开度;根据油门开度、异步电机的当前输出扭矩以及同步电机的当前输出扭矩,分别确定同步电机的扭矩下降斜率以及异步电机的扭矩上升斜率;根据扭矩下降斜率、扭矩上升斜率、异步电机的当前输出扭矩以及同步电机的当前输出扭矩,分别确定发送至异步电机的第一请求扭矩以及发送至同步电机的第二请求扭矩,用以控制异步电机及同步电机运行。如此,在两驱切换四驱的扭矩协调状态下,通过对扭矩上升斜率以及下降斜率进行控制,使扭矩下降斜率与扭矩上升斜率保持一致,保证车辆运行的平顺性。
Torque control method and device for switching two-wheel drive into four-wheel drive
一种两驱切换四驱的扭矩控制方法及装置
2025-01-24
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
Four-wheel drive gradient torque control method and device, and four-wheel drive vehicle
European Patent Office | 2020
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