Wheel-side self-powered brake actuators for automotive electromechanical brake systems

Abstract

The invention relates to the technical field of vehicle braking, in particular to a wheel-side self-powered braking actuator of an automotive electromechanical braking system, which includes a braking actuator part and a regenerative motor part. The brake execution part includes stepper motor, planetary gear mechanism, screw nut mechanism and brake caliper body, etc. The regenerative motor part includes electromagnetic clutch and regenerative motor. The electromagnetic clutch and regenerative motor are arranged axially along the brake disc. When the car is braking, the electromagnetic clutch is preferentially controlled to engage, and the brake disc drives the regenerative motor to rotate, converting the braking energy of the car into electrical energy and providing braking torque. When the braking torque provided by the regenerative motor is insufficient, the stepper motor is controlled to rotate, and the friction block is pushed to the brake disc through the planetary gear mechanism and the screw nut mechanism to implement friction braking. The patent of the invention has the advantages of compact structure, convenient layout, good dynamic characteristics and easy integrated control, etc., and can directly use the recovered braking energy to drive the action of the braking actuator.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a wheel-edge self-powered braking actuator of an automotive electromechanical braking system. Background technique [0002] The braking system is one of the important components of the automobile chassis, which is directly related to the comprehensive performance of the automobile and the safety of life and property. Although the traditional hydraulic and pneumatic braking systems can meet the requirements of the existing braking regulations, there are complex pipeline arrangements, relying on vacuum booster devices, slow braking response speed, non-active adjustment of braking torque, and difficulty in matching Inadequacies such as other system integration control are not suitable for the development requirements of automobile, especially electric vehicle chassis integration control. [0003] The electronically controlled braking system realizes the decoupling of the br...

AI Technical Summary

Problems solved by technology

However, most of the current EMB systems are single-motor actuators, which fail to make full use of the vehicle's braking energy to drive the friction brake, and cannot share the vehicle's braking load to reduce the wear of the friction brake pair.

So far, the wheel self-powered brake actuators of automotive electromechanical brake systems have rarely been mentioned.

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