Coordinated control method for drive-by-wire and braking of a hybrid electric vehicle

Abstract

The invention provides a hybrid electric vehicle driving by wire and braking coordinated control method, which is characterized in that: the method realizes the operation of the hybrid electric vehicle by an integrated device for the hybrid electric vehicle driving by wire and braking coordinated control, and the control system real-time according to The size of the accelerator pedal and the displacement information of the brake pedal determine the operating state of the hybrid electric vehicle and divide it into five working conditions: start-up acceleration, speed-up, driving, deceleration, and braking, and calculate the target power. According to the operating state and target power of the hybrid electric vehicle , to determine the power mode, the control system controls the power supply DC power supply and the bidirectional conversion module through a coordinated control strategy, and realizes the coordinated work of the electric operation mode and the power generation operation mode of the permanent magnet synchronous motor of the hybrid electric vehicle. This method can realize the wire control of the hybrid electric vehicle Coordinated control of driving and braking improves drive-by-wire and braking-by-wire capabilities and shortens response time; at the same time, it realizes kinetic energy recovery in braking operating conditions and saves energy.

Description

technical field [0001] The invention relates to the technical field of drive-by-wire and brake-by-wire for hybrid electric vehicles, in particular to a method for coordinated control of drive-by-wire and brake for hybrid electric vehicles. Background technique [0002] At present, the rapid increase in the number of traditional fuel hybrid vehicles has brought about problems such as environmental pollution, greenhouse effect and energy crisis. New energy hybrid vehicles have a tendency to gradually replace traditional fuel hybrid vehicles. Hydrogen fuel cell system hybrid vehicles have good development prospects due to their advantages of zero emission, no noise, and high efficiency. The traditional driving and braking technology of hybrid electric vehicles can no longer meet the technical requirements of fast response of driving and braking of hybrid electric vehicles; with the rapid development of electronic technology and control theory, various chassis control technologi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the invention is: Aiming at the technical problems existing in the prior art, a method for coordinated control of drive-by-wire drive and brake of a hybrid electric vehicle is provided, which overcomes the shortcoming of slow response speed of traditional chassis control technology and solves the problem of when the brake-by-wire system is running. The problem of kinetic energy recovery can improve the response speed and safety reliability of the whole system, and reduce the feedback error of the system

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