Control method for improving safety of four wheel hub motor-driven electric car after tire bursting

Abstract

The invention discloses a control method for improving the safety of a four wheel hub motor-driven electric car after tire bursting. Four wheels of the electric car are each provided with a hub motor for driving the corresponding wheel to rotate; each wheel is further provided with a steering motor for ensuring independent steering of the wheel; electrically-controlled hydraulic braking units are adopted to control braking force of the corresponding wheels, that is to say, single-wheel independent driving, braking and steering are achieved, and therefore a new way and a new implementation platform are supplied to safety control of the electric car after tire bursting. According to the control method, the four wheels are effectively controlled to generate necessary compensating moment on the basis of a method achieving comprehensive braking, steering and driving control over the wheels of the complete car, and then the driving safety of the electric car after tire bursting is improved. A whole system comprises a sensing layer, a control layer and an execution layer.

Description

Technical field: [0001] The invention belongs to the field of automobile active safety, and specifically proposes a control method for improving the safety of a flat tire of an electric vehicle driven by a four-wheel hub motor, aiming at improving the safety of the electric vehicle after a flat tire and reducing or avoiding the occurrence of traffic accidents. Background technique: [0002] With the gradual depletion of non-renewable fossil fuels in the world, the problem of environmental pollution is becoming more and more prominent, and as an environmentally friendly and pollution-free electric vehicle, it has attracted more and more attention and attention. Among them, as a kind of electric vehicle, the electric vehicle independently driven by four-wheel hub motors has attracted the most attention and has great development potential. Each of the four wheels of the car is equipped with a hub motor to drive the wheel to rotate and a steering motor to ensure that the wheel t...

AI Technical Summary

Problems solved by technology

[0004] In the face of severe resources, environmental challenges and shocking statistics of traffic accidents, although the traditional vehicle stability control system (ESC) can control the vehicle stability after a tire blowout to a certain extent, it is not designed for tire blowouts. , so the overall control effect is not very ideal, such as: yaw inevitably occurs, the lane following ability decreases; the possibility of a flat tire detaching from the rim increases; the yaw moment efficiency generated by braking decreases, etc.

Although some ESC-based tire burst stability control methods have achieved good control effects, the existing problems still need further research and solution.

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