Four-wheel drive vehicle power system and four-wheel drive vehicle control method

Abstract

The application provides a four-wheel drive vehicle power system and a four-wheel drive vehicle control method, and relates to the technical field of vehicles. The system adopts an integrated driving and generating motor for the front axle, replaces double motors or an independent range increasing structure, simplifies parts, reduces the volume and weight of the assembly, reduces costs, and solves the problem of idle redundancy of the motor of a large-capacity battery vehicle model. The front axle is provided with double clutches, and the second clutch can disconnect the transmission link between the integrated driving and generating motor and the front wheels, so that the drag resistance of the front axle can be cut off in a pure rear drive working condition, power consumption is reduced, and endurance is improved. The integrated driving and generating motor realizes power generation or driving at different times, cooperates with the rear axle independent driving motor to form four-wheel drive, and can consider pure electric driving and long-distance energy supplement. The front and rear motors are respectively provided with motor controllers and are connected with a power battery, so that bidirectional storage and utilization of electric energy can be realized. The front and rear axles are respectively provided with speed reduction gear pairs and differential mechanisms, the transmission structure is simple, and power transmission is smooth and stable.

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