Electric vehicle with independent steering and driving of each wheel and steering and driving control method thereof

Abstract

An electric vehicle with independent steering and driving of each wheel and its steering and driving method. The electric vehicle includes a body, a suspension system, a wheel steering system, several wheel assemblies and a drive control system. The wheel steering system includes the steering control device, the steering control subsystem and the steering mechanism with the same number as the wheel assembly and installed on the vehicle body through the suspension system. There is space for avoiding positions on the outside of the suspension system and at the front and rear ends. Each steering mechanism includes The kingpin rod and the wheel axle, the steering control subsystem includes the steering controller, the steering steering gear and the steering sensor which are arranged on the top of the kingpin rod and connected with the kingpin rod; each wheel assembly includes the wheels mounted on the wheel shaft and Hub motor; the drive control system includes a vehicle speed control pedal and a drive controller that controls the hub motor. In the present invention, each wheel is equipped with a steering gear and a wheel hub motor, and each wheel can be independently steered and driven at a large angle, so that the driving stability and maneuverability of the vehicle are better, and the transmission efficiency is high.

Description

Technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle with independent steering and driving of each wheel and a steering control method thereof. Background technique [0002] At present, the vast majority of traditional four-wheel vehicles adopt the design of front-wheel steering and rear-wheel drive or front-wheel steering and front-rear wheel drive. With the increasing requirements for driving performance and comfort performance, four-wheel steering has become the development direction of four-wheel vehicle technology, and four-wheel steering systems have become a research hotspot. For example, Delphi Corporation of the United States developed the Quadrasteer four-wheel steering system. [0003] At present, some high-end cars have adopted four-wheel steering system. For example, BMW's new 7-series, Nissan Fengya 350GT, Mazda 929 and other cars have adopted four-wheel steering technology. The four-wheel stee...

AI Technical Summary

Problems solved by technology

[0007] However, it can still be seen from the above that the four-wheel steering systems currently used in automobiles all use mechanical components such as steering gears and steering mechanisms, and the deflection angles of the front and rear wheels are limited, so large-angle deflection cannot be achieved.

Therefore, the improvement of steering flexibility is limited, so the maneuverability of the car is greatly limited

[0008] In addition, the existing electric vehicles still mainly adopt the centralized drive mode in terms of drive system, that is, each drive wheel is driven by an electric motor through mechanical transmission components such as a gearbox, a drive shaft, and a drive axle, which not only has a complex structure, but also has limited transmission efficiency.

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