Vehicle with dual motor electric drive axle

Abstract

The invention provides a vehicle with a double-motor electric drive axle and a drive method. Power output by a first drive motor M1 is transmitted to a third cylindrical gear transmission speed reduction module; the power output by the first driving motor M1 is transmitted to a first half shaft and a second half shaft to drive a first wheel and a second wheel; and power output by a second driving motor M2 sequentially passes through a first gear transmission speed reduction module and a second gear transmission speed reduction module and is converged with power output by the first driving motor M1 at the third gear transmission speed reduction module. By configuring different working modes and control strategies, different coupling of driving force under different vehicle speeds and different loads is achieved, real-time power distribution is achieved, the two motors share two gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motors can be further improved, the motors can work in a high-efficiency interval, and the dynamic property and economical efficiency of the whole vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle with a dual-motor electric drive axle. Background technique [0002] Judging from the development trend of new energy vehicle electric drive system technology at home and abroad, it is generally developing in the direction of power system integration and integration. Domestic and foreign car companies such as Tesla, GM, Nissan, China FAW, Dongfeng, Changan, etc. have integrated drive motors, gearboxes, reducers, and axles as electric drive assembly products. Through the integrated design, on the one hand, the volume and weight of the assembly can be further reduced, and the power, volume, and torque density of the system can be improved; It can improve the versatility of products and reduce the cost of development and production. [0003] At present, electric drive axles of new energy commercial vehicles mostly adopt single-motor matching AMT gearboxes, single-mot...

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Problems solved by technology

[0003] At present, electric drive axles of new energy commercial vehicles mostly adopt single-motor matching AMT gearboxes, single-motor matching reducers, double-motor matching reducers, and double-motor matching AMT gearbox solutions, and most of them are single-motor solutions. The degree is low, which is reflected in the following: the powertrain occupies a large space and is heavy in weight. In order to meet the complex working conditions, a single motor considers a large design margin, and a large power motor is often used. However, in most cases, the demand The power is small, resulting in the actual load rate of the motor at a low level, and the drive motor runs in the low-efficiency area for a long time, resulting in high energy consumption of the vehicle

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