Large-angle all steer-by-wire system for electric vehicle driven by hub motor, and method thereof

Abstract

The invention provides a large-angle all steer-by-wire system for an electric vehicle driven by a hub motor, and a method thereof. The large-angle all steer-by-wire system comprises an executing mechanism, a detecting mechanism, a steering mode selecting button and an electronic control unit; the executing mechanism comprises a T-shaped shaft, a gear ring, a driving device, a rotating mechanism and an electromagnetic clutch; the electromagnetic clutch controls combination and disconnection of a steering mechanism and a vehicle frame; the detecting mechanism detects the turning angle of wheelsand the turning angle of a steering wheel, and transmits detected signals to the electronic control unit; the steering mode selecting button is connected with the electronic control unit; and the electronic control unit calculates the turning angle of the wheels according to the received signals, and controls working of the driving device and the electromagnetic clutch according to the signals ofthe detecting mechanism and a steering mode selected by the steering mode selecting button. According to the large-angle all steer-by-wire system, the safety of steering and travelling is improved, the energy loss caused by transmission of mechanical parts through traditional steering is further reduced, and the urban space and road utilization rates are effectively increased.

Description

technical field [0001] The invention belongs to the field of automobile research, and in particular relates to a large-angle full-wire control steering system and a method for an electric vehicle driven by a hub motor. Background technique [0002] With the rapid development of the economy, the number of automobiles in my country has exceeded 200 million, and the turning radius of automobiles is relatively large. In the case of limited urban land resources, imperfect urban road construction and high costs, non-renewable resources such as petroleum Decreasing, the demand for environmental protection is becoming more and more urgent and urban roads are becoming more and more congested Can not be ignored in the background of large base. Therefore, as the parking space is getting smaller and smaller today, it is very necessary to improve the structure of the vehicle steering system, reduce energy consumption, improve the flexibility of the vehicle and the utilization rate of the ...

AI Technical Summary

Problems solved by technology

[0003] The application number is 201510080160.6, an all-round full-wire steering system for electric vehicles based on in-wheel motors. Although four tires can independently steer at a large angle, the tires are prone to interference with the steering rods, and the steering is limited by the geometry of each mechanical mechanism, making it difficult to be flexible. large angle turn

The application number is 201710699258.9, a multi-axis in-wheel hub motor driven rear wheel steering-by-wire drive device and its steering method. Although the electronic control unit can realize the wire-controlled steering of the rear wheels, the front wheels are mechanically steered, and the steering cannot be accurately guaranteed. At the same time, the existence of the steering trapezoidal arm greatly limits the angle that the wheel turns

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