Electrohydraulic-combined brake control method of battery electric vehicle

Abstract

The invention discloses an electrohydraulic-combined brake control method of a battery electric vehicle and belongs to the technical field of electric vehicle control. During braking of an electric vehicle, stability of a vehicle body is guaranteed, part of braking energy can be recycled during braking by the aid of reversible power characteristics of a wheel hub motor, charging strategy can be optimized according to the size of electric current generated, kinetic energy consumed during braking can be converted into electric energy to be stored, and the purpose of increasing continuous driving range can be achieved. Relevant signals measured by a sensor and about a brake pedal, travel speed, wheel speed, brake cylinder pressure, battery end voltage, battery charging current, torque of a motor and the like are transmitted to a control system, the status of the vehicle body, wheels and a battery are monitored in real time by a controller, different barking requirements, energy recycling process braking security maintenance are realized by adjusting motor electromagnetic braking torque and hydraulic mechanical braking torque through an electrohydraulic-combined system, and higher efficiency can be achieved in utilization of energy of the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electro-hydraulic combined regenerative braking system and a control method assembled with hub motors. Background technique [0002] At present, the development of electric vehicles, the realization of the electrification of vehicle energy and power systems, and the promotion of the strategic transformation of the traditional automobile industry have formed a trend in the world. With its low noise, no direct pollution, high energy efficiency, and good power performance, electric vehicles have become the mainstream research direction of future automobile development. Once electric vehicles achieve market breakthroughs, they will have a huge and far-reaching impact on the international automobile industry structure. Therefore, conforming to the development trend of the international automobile industry, grasping the strategic opportunity of the transformation of the t...

AI Technical Summary

Problems solved by technology

The traditional ABS anti-lock braking system adjusts the braking torque by adjusting the pressure of the brake cylinder, so as to realize anti-lock braking adjustment, but the adjustment response speed is slow, and the braking advantage of the motor is not fully utilized to participate in this process, while maximizing regenerative braking energy

Images