Energy-feedback active control type air braking system

Abstract

The invention provides an energy-feedback active control type air braking system, relates to an air braking system of electric automobile energy feedback and belonging to the field of electric automobiles. The energy-feedback active control type air braking system comprises a high-air-pressure generation module, an active air pressure control module and an ABS (Anti-skid Brake System) module, wherein the high-air-pressure generation module is used for generating high-pressure air for the whole automobile under certain pressure; and the active air pressure control module comprises a pedal displacement sensor, a brake pedal, a brake valve, a brake controller, a front-axle double-control proportional relay valve and a rear-axle double-control proportional relay valve. The energy-feedback active control type air braking system is capable of realizing ideal distribution of a braking force and maximization of the rate of energy recovery. The energy-feedback active control type air braking system employs the double-control proportional relay valves to realize active real-time accurate distribution of the braking forces of a front axle and a rear axle, the braking motor of a driving shaft motor and the mechanical braking force; and simultaneously, the energy-feedback active control type air braking system is capable of guaranteeing braking security by starting the conventional braking manner when the electric control part of the double-control proportional relay valves becomes invalid. Furthermore, the energy-feedback active control type air braking system provided by the invention is applied to electric vehicles having the air braking system.

Description

Technical field [0001] The invention relates to a pneumatic braking system for electric vehicle energy feedback, in particular to a pneumatic braking system used by electric commercial vehicles, and belongs to the field of electric vehicles. The application object of the present invention is an electric vehicle with a pneumatic braking system. Background technique [0002] As an important means to alleviate energy shortage and environmental pollution, electric vehicles have received more and more attention, and the short driving range has always been a bottleneck in the development of electric vehicles. Electric commercial vehicles (electric buses, electric sanitation vehicles, electric sprinklers) under urban driving conditions, due to traffic congestion, low vehicle speeds, and frequent repeated start / stops, most of the traction energy is caused by friction during braking. The heat generated is consumed in the form. If this part of energy is effectively recovered through ener...

AI Technical Summary

Problems solved by technology

[0004] At present, the pneumatic braking power of most electric vehicles is uncontrollable, so the regenerative braking adopts a parallel regenerative braking control strategy. When braking, only the driving wheel is equipped with a motor braking force, and the ratio of the front and rear wheel pneumatic braking power is set to a certain value during development. value, which cannot be controlled separately. When the motor braking force is added to the driving wheel, it is easy to cause excessive braking force, which affects the braking performance, and the braking energy recovery is not sufficient, and the effect is not ideal.

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