A kind of vehicle and its wheel drive system and wheel drive torque distribution method

Abstract

The invention relates to a vehicle and its wheel-side driving system and a method for distributing wheel-side driving torque. The driving system has no less than two drive shafts, which can arrange the interior space of the vehicle more reasonably, and can obtain better dynamic performance and passenger carrying capacity. Compared with single-motor-driven buses, the climbing performance and climbing performance are enhanced; it can also flexibly allocate the torque of each drive shaft according to the power demand of the vehicle, obtain higher efficiency of the wheel-side drive system, and save the power consumption of the power battery to the greatest extent; Inter-torque distribution, steering differential and other control modules are combined to form a set of control methods suitable for multi-rear axle wheel drive systems, which can realize drive system energy optimization, ASR, ESP, EBS and other advanced automotive electronic control systems Functions make the whole vehicle achieve a good balance in terms of power, economy, comfort and safety.

Description

technical field [0001] The invention relates to a vehicle, its wheel drive system and a wheel drive torque distribution method, and belongs to the field of electric vehicles. Background technique [0002] With the rapid increase of car ownership, the energy shortage and air pollution brought by cars to the earth are becoming more and more serious. New energy vehicles, especially pure electric vehicles, have become the direction of active research and development by major manufacturers. As a driving method of pure electric structure, wheel drive has many advantages such as short power transmission route and flexible layout. [0003] Among the existing electric vehicle configuration schemes, the scheme of directly integrating the motor with the wheel or the drive scheme of the wheel-side motor is the most conducive to improving the performance of the vehicle, and the drive technology of the wheel-side motor is a key to improving the performance of electric vehicles Technology...

AI Technical Summary

Problems solved by technology

This solution can timely adjust the slip ratio, motor state and torque distribution according to the vehicle's driving state, vehicle speed at different times and driver's intention, but its disadvantage is that the used motor torque distribution method is mainly for the hub motor of each independent wheel Torque distribution is not suitable for multi-axis systems, and the transmission efficiency is not guaranteed, and its control method is relatively complicated, which is not conducive to practical application

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