Front bumper based on electrorheological effect and multi-target adaptive protection method

By using a front bumper with electrorheological effect, millimeter-wave radar and cameras are used to identify obstacles and adjust the bumper stiffness in real time. This solves the problem that existing bumpers cannot adapt to different collision objects and achieves a fast and accurate protection effect.

CN122126208APending Publication Date: 2026-06-02CHINA AUTOMOTIVE ENG RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA AUTOMOTIVE ENG RES INST
Filing Date
2026-04-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The rigidity design of existing car front bumpers cannot adapt to the differences in different collision objects, resulting in poor protection for children, adults and vehicles in collisions, and failing to meet regulatory requirements and actual safety needs.

Method used

The front bumper adopts an electrorheological effect-based design. It uses millimeter-wave radar and a forward-looking camera to identify obstacles. Combined with an electrorheological adjustable stiffness component and a protective control drive device, it adjusts the bumper stiffness in real time to adapt to different collision objects. It uses an electric field to control the electrorheological material to complete the stiffness switching within milliseconds.

Benefits of technology

It enables automatic adjustment of bumper stiffness based on the collision object, reducing secondary injuries to pedestrians, improving the energy absorption and structural protection capabilities of vehicles during collisions, and has a fast response speed, effectively solving the technical contradictions of existing technologies.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of automotive passive safety technology, and discloses a front bumper and multi-target adaptive protection method based on electrorheological effects. It first includes a crossbeam rigidly connected to the front longitudinal beam of the vehicle body, on which a protective component is fixedly mounted. A protection control drive device is connected to the protective component, and the protection control drive device is connected to an information recognition device for collecting and identifying obstacles. The ECU extracts target features and classifies the collected data; then calculates the time-to-collision (TTC) with the obstacle target; and outputs a target stiffness command based on the type of the identified obstacle target and the TTC. Finally, it calculates and outputs a drive voltage command to a high-voltage module. This invention can automatically adjust the bumper stiffness according to whether the collision object is a child, an adult, or a vehicle, reducing secondary injuries in pedestrian collision scenarios and solving the technical contradiction caused by the fixed stiffness of traditional bumpers.
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