Electric energy assisted braking system with complete coupling function between fraction braking and regenerative braking

Abstract

The invention discloses an electric energy assisted braking system with a complete decoupling function between the fraction braking and the regenerative braking. When braking energy of a new energy vehicle is recycled, the friction braking force and the regenerative braking force can be decoupled completely, the energy can be recovered to the maximum extent, and electric braking power-assisted function and active braking function are possessed. The electric energy assisted braking system comprises a brake pedal, a push rod, an electric power-assisted assembly, an electromagnet connector, a master cylinder push rod, a master cylinder, a fluid reservoir, a hydraulic control unit, sensors and a motor; the brake pedal is connected with the push rod through a rest pin, the master cylinder and the hydraulic control unit are communicated through braking lines, and the motor, the hydraulic control unit and the sensors are all connected with an electronic control unit in a vehicle; the electromagnet connector is arranged between the electric power-assisted assembly and the master cylinder, and the front end of the electromagnet connector is connected with the master cylinder push rod in a contacting mode; a rack of the electric power-assisted assembly is connected with the push rod is a contacting mode, a pressure rod is coaxially arranged with the master cylinder push rod, a gap is reserved between the pressure rod and the master cylinder push rod, and the pressure rod and the master cylinder are connected through a worm.

Description

technical field [0001] The invention belongs to the technical field of automobile braking systems, and in particular relates to an electric power-assisted braking system with a complete decoupling function of friction braking and regenerative braking. Background technique [0002] With the development of automobile technology, new energy vehicles have entered the stage of history. Compared with traditional vehicles, new energy vehicles use motors as the core drive components. Therefore, the drive motor can be converted into a generator when braking. , to convert the kinetic energy of the vehicle into electrical energy to achieve energy recovery. [0003] At present, most automobile hydraulic braking systems use vacuum power assist, and a few cars use other forms of power assist devices such as electric power assist (such as the e-ACT braking system of Nissan Motor Company). The vacuum booster needs the engine to cooperate with the pumping vacuum. Therefore, if the braking s...

AI Technical Summary

Problems solved by technology

This type of braking system requires a complex mechanical conversion structure to generate braking force. Although the response speed is fast, because there is no hydraulic circuit in the system, an additional failure backup mechanism is required. At the same time, the system requires four motors and a high-performance power supply. , high manufacturing costs, for these reasons, EMB has not been applied in mass-produced cars so far

[0005] Therefore, from the perspective of matching the regenerative braking function of new energy vehicles, the brake-by-wire system can realize the complete decoupling of friction braking and regenerative braking, which has certain advantages; however, the manufacturing cost of the brake-by-wire system is relatively high. Fail-Safe Capabilities Difficult to Gain Automakers' Trust

Although the electric brake booster system does not require an additional failure backup mechanism, during the regenerative braking process, the friction brake is always involved in generating braking force, which affects the braking energy recovery effect

At present, there is no electric power-assisted braking system that can realize the complete decoupling of friction braking and regenerative braking

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