Dynamic coupling pure-electric drive axle and control method thereof

Abstract

The invention discloses a dynamic coupling pure-electric drive axle and a control method thereof. The drive axle mainly comprises a central motor, two hub motors, two planet mechanisms, five brakes and four dead axle gear pairs. A sun gear and a gear ring of three elements of each planet mechanism serve as two input ends or one element serves as an input end, and a planet carrier of each planet mechanism serves as an output end. The central motor is connected with the sun gears of the planet mechanisms on the corresponding sides through two corresponding dead axle gear pairs, the two hub motors are connected with the gear rings of the planet mechanisms on the corresponding sides, the planet carriers on the two sides are connected with rims on the corresponding sides through transmission shafts to serve as output ends, power is finally transmitted to the rims through the planet carriers, and a vehicle is driven to run. By the adoption of the structural scheme, different working modes can be achieved according to the actual road condition requirements, the high requirement of the vehicle for the dynamic property can be met, a power source works in an efficient area, and the economical efficiency of the vehicle is improved. Meanwhile, the unsprung mass of the vehicle is reduced, and the riding comfort and control stability of the vehicle are improved.

Description

technical field [0001] The invention relates to a vehicle drive axle and a control method thereof, in particular to a power coupling pure electric drive axle for an electric vehicle and a control method thereof. Background technique [0002] With the continuous increase in the number of cars, the shortage of petrochemical energy has appeared before people's eyes. The exhaust gas emitted by traditional cars has made the environmental pollution for human living more and more serious. The transformation of automobiles is also an inevitable trend in the development of the automobile industry. [0003] At present, most domestic electric vehicle companies are driven by central motors. In fact, they have transformed from traditional vehicles. There are still mechanical components such as clutches, transmissions, reducers, and differentials in traditional vehicles, which makes power transmission inefficient. , a serious waste of energy. Due to the limitation of motor power and bat...

AI Technical Summary

Problems solved by technology

However, because the hub motor is placed in the narrow wheel, it is limited by space, so the power of the hub motor is limited

If the load or speed of the car increases, the hub motor will run under heavy load or even overload, which will seriously affect the normal operation of the hub motor, resulting in a great reduction in the cruising range of the car and the life of the hub motor

At the same time, the wheel drive chassis structure will increase the unsprung mass of the car, which will affect the ride comfort, ride comfort and handling stability of the car.

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