关键词: 汽车制动；电子制动器；行星滚柱丝杠；一体化执行器

Abstract: A method system for automotive electronic braking using planetary roller screws as actuators are proposed and established in this paper. The core of this method is to achieve greater load- bearing capacity and equivalent reduction ratio by reducing the actual lead of the planetary roller screw, thereby eliminating the reduction mechanism and achieving the goal of simplifying the structure, reducing volume, and reducing weight. This paper expounds the method of realizing the integrated actuator by directly driving the nuts of the planetary roller lead screw by the motor rotor, and analyzes the basic relationship between the movement to ensure smooth braking and the dynamic calculation. The design example of a certain model of automotive electronic brake shows that compared with existing hydraulic brakes, the radial size of the electronic brake caliper is slightly smaller, the lead is less than 0.54, and the achievable reduction ratio is greater than 5, which can replace the existing hydraulic brakes.

Key words: Automotive brake; Electronic brake; Planetary roller screw; Integrated actuator