Automobile brake energy regeneration control device and system

Abstract

The invention provides a vehicle brake energy regeneration control method and system; the system comprises a hydraulic energy accumulator, a variable pump / motor, an electromagnetic clutch, a brake pedal switch, an acceleration pedal switch, a gear switch, a road slope sensor, a speed sensor, a pressure sensor of the energy accumulator, a hydraulic control unit and an electric control unit; the system automatically identifies the acceleration or brake intention of a driver, automatically detects the running state of the vehicle and the road slope situation, calculates the control current I1 of the proportional electric magnet of the variable pump / motor on different downgrade road slopes or horizontal roads and at different speeds by adopting the formula (I), calculates the control current I2 of the proportional electric magnet of the variable pump / motor on different upgrade road slopes or horizontal roads and at different speeds by adopting the formula (II) and carries out brake energy releasing circulation control, so as to control the running stability of the vehicle and improve the recovery rate as well as the regeneration rate of the brake energy.

Description

technical field [0001] The invention relates to an automobile braking energy regeneration control method and system, belonging to the technical field of automobile energy saving. Background technique [0002] When the car is moving forward on a downhill road or a level road, if the speed is too high or the slope is too large, the car needs to be braked, and when the car is moving forward on an uphill road or a level road, it is necessary to step on the accelerator pedal to increase the power output of the engine. During the braking process of driving on a downhill road or a level road, the kinetic energy and potential energy of the car are converted into heat energy through the friction of the brakes and the friction between the tires and the ground and are wasted. At the same time, the wear of the brakes and tires is increased, reducing the In the process of accelerating on an uphill road or on a level road, the load on the engine needs to be increased, which will increase ...

AI Technical Summary

Problems solved by technology

[0004] In the existing hydraulic energy storage type vehicle braking energy regeneration systems and methods, there is no hydraulic energy storage type that performs braking energy recovery cycle control and braking energy release cycle control according to the slope of the road and the downhill slope and the speed of the vehicle. The method and system for regeneration of braking energy of a vehicle cannot meet the requirements of braking energy recovery control and braking energy release control when the vehicle is running on different roads, downhill slopes, and at different speeds

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