Method for cooperatively controlling air pressure and regenerative brake of hybrid electric bus

Abstract

The invention relates to a method for cooperatively controlling an air pressure and regenerative brake of a hybrid electric bus, which belongs to the technical field of new-energy vehicles. The method comprises the following steps of: firstly, collecting a current air pressure brake force, a brake pedal travel, a brake pedal travel speed, battery information, motor information and vehicle state information of a hybrid electric bus; secondly, distributing the air pressure brake force and a motor brake force by utilizing a regenerative brake force distribution algorithm; thirdly, cooperatively controlling regenerative brake and an ABS (Antilock Brake System) by utilizing a regenerative brake and ABS cooperative control algorithm; and fourthly, compensating and controlling the air pressure brake force by utilizing an air pressure brake force compensation control algorithm. By utilizing the invention, part resources of the common air pressure brake system and the regenerative brake system of the hybrid electric bus can be fully utilized, the brake energy can be recycled to the maximum extent, the economical efficiency of the entire bus is enhanced, and wheels can be prevented from locking so that the brake safety of the entire bus is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles. Background technique [0002] Coordinated control of pneumatic braking and regenerative braking in hybrid electric buses plays an important role in maximizing energy recovery and braking safety during regenerative braking, so it has attracted great attention from domestic and foreign companies and scholars. However, the current research still focuses on improving the recovery rate of braking energy through the distribution of regenerative braking force, and there are few regenerative braking force distribution strategies that consider the safety of braking. Therefore, it is necessary to distribute the regenerative braking force from the viewpoint of braking safety. [0003] There are few domestic studies on the coordinated control strategy of regenerative braking and ABS. Most of the proposed methods are that when the ABS is triggered, the regenerative braking force is turned off, an...

AI Technical Summary

Problems solved by technology

[0004] Due to the influence of the inertia of the vehicle transmission system, the response lag of the motor braking force is greater than that of the air pressure braking force, which will cause insufficient braking force of the vehicle. At present, domestic research on this is still blank, so it is necessary to compare and develop air pressure. Dynamic Compensation Control Algorithm

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