Hybrid power four-wheel drive configuration method for electrifying internal combustion power vehicle

Abstract

The invention discloses a hybrid power four-wheel drive configuration method for electrifying a fuel vehicle. The method is characterized in that an electric differential drive system which is composed of two alternating current motors and has an electric differential and differential lock drive function is configured; when the two front wheels of the vehicle are driven by internal combustion power, the electric differential driving system is configured to provide power for the two rear wheels of the vehicle; when the two rear wheels of the vehicle are driven by internal combustion power, theelectric differential driving system is configured to provide power for the two front wheels of the vehicle; an internal combustion power vehicle is electrically driven, four-drive-force split-axle configuration is achieved through hybrid power, a mechanical differential mechanism is omitted, and differential lock and even differential rate control is achieved; the starting and accelerating performances of the vehicle are improved; performance improvement of an electric differential system in the aspects of differential, anti-skid driving, trafficability, controllability, safety, light weightand energy conservation is fully utilized, great technical breakthrough and innovation in the aspects of high-performance four-wheel drive, environmental protection, cost reduction and the like of thevehicle are achieved, and the four-wheel drive technology and market value are huge.

Description

technical field [0001] The invention belongs to the technical field of automobiles and new energy vehicles, and in particular relates to a hybrid four-wheel-drive configuration method for electrifying internal combustion-powered vehicles. Background technique [0002] Most of the existing vehicles powered by internal combustion engines use differentials to realize the differential drive between the driving wheels, and new energy electric vehicles are also equipped with such mechanical differentials. Among electric vehicles, the structural forms of hybrid vehicles are generally divided into three types, namely series, parallel and hybrid, which are divided according to the power flow relationship between the engine and the drive motor. However, no matter which structural form, the driving mode of the driving wheel train has not been changed, that is, the hybrid power of any structural form outputs the final power to the input shaft of the differential, and then is distributed...

AI Technical Summary

Problems solved by technology

[0008] ①The mechanical differential is relatively bulky, which increases the difficulty of vehicle load design and is not conducive to vehicle lightweight

[0009] ②The use of mechanical differential has insertion loss, which reduces the efficiency of mechanical energy transmission and increases the noise of the wheel train

[0010] ③Existing differentials cannot be locked, and a few differentials equipped with differential locks have complex structures, such as friction plates, which are prone to wear and heat during work, shortening maintenance cycles, increasing maintenance costs, and increasing failure rates

[0011] ④ Existing mechanical differentials and differential locks cannot achieve differential speed control

[0012] ⑤ The cost of existing mechanical differentials and differential locks is relatively high, while the hub motor control system is too complicated and the technology is immature

[0013] ⑥For permanent magnet motor vehicles, there are problems of high cost, complex control, thermally induced demagnetization and secondary battery loss

[0014] ⑦The use of permanent magnet motors in the industry chain still has consumption of scarce rare earth resources and environmental protection problems in the mining and processing process

[0015] Some high-end models can use in-wheel motors or wheel-side motors to realize the electric differential speed function, but they all use complex control technologies and realize these functions with the support of high cost and high price. Such technologies are difficult to achieve low-cost popularization and application , low technical applicability, many new energy vehicles are unfortunately equipped with these high-cost systems

[0016] In addition, it is about changing the motor into a differential motor structure design with internal and external dual rotors. This design is to connect the inner rotor to an output shaft to drive one wheel, and then connect the outer rotor to another output shaft to drive the other wheel after the gear is reversed. One wheel, or the outer rotor is connected to an output shaft to drive a wheel, and the inner rotor is connected to another output shaft to drive another wheel after the gear is reversed, so that the output shafts of the inner and outer rotors turn in the same direction, and the force between the inner and outer rotors is the driving force of the motor , although the differential effect can be realized, this structure cannot realize the differential lock function, and one side needs a reverse mechanism to participate in the operation, which reduces efficiency, increases structure, increases weight, increases production costs, and increases maintenance costs. The rotational momentum of the inner and outer rotors is difficult to be consistent, which will lead to an imbalance in the rotational momentum of the driving wheels on both sides, and there is a risk of steering, so it has not been practically applied

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