Automobile collision buffering device based on magnetic converting technique and buffering energy-absorbing method

Abstract

The invention relates to a car collision cushioning device and a cushioning energy-absorbing method based on the magnetorheological technology. The cushioning device comprises a bumper, a magnetorheological buffer and a feedback circuit, wherein the magnetorheological buffer is arranged between the bumper and a frame cross member by flanges and composed of a helical spring, a field core, a piston, a piston rod, a cylinder, magnetorheological fluid, a first actuating coil, a magnetorheological elastomer and a second actuating coil, the feedback circuit is composed of a first acceleration sensor, a second acceleration sensor and a controller, in an instant of car collision, the controller judges whether the acceleration signal differential value of the acceleration sensor exceeds a preset threshold value or not, and regulates current output to the first actuating coil and the second actuating coil by self-adapting according to difference of collision speed, changes rigidity and damp of a car collision cushioning system, thereby reducing passenger injury and car damage caused by collision.

Description

technical field [0001] The invention belongs to an automobile protection device for automobile passive safety, and in particular relates to an automobile collision energy-absorbing device and a buffer energy-absorbing method. Background technique [0002] Automobile safety is an eternal subject of automobile development, and the passive safety protection of automobiles is one of the most important aspects. The survey results show that no matter how good the active safety of the car is, it can only avoid 5% of the accidents, so the passive safety of the car has a great influence on the safety level of the car. The current collision buffer devices used to improve the passive safety of automobiles can be divided into three categories according to their structural forms: the first type is a simple non-metallic material buffer device with a simple structure and low cost; the second type is composed of horizontal bars, inner Lining reinforcements and resin foam fillers, etc.; the...

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Problems solved by technology

Although the third type has better cushioning and energy-absorbing characteristics, it can only be aimed at specific collision conditions and does not have self-adaptive

There are also domestic patents (CN1222432C, CN1218851C, CN85204644U, CN1217267A) that use mechanical, hydraulic or pneumatic methods to absorb impact vibration energy, but these can only be designed for a specific impact intensity, and the characteristics of the system cannot be adaptively adjusted according to the impact intensity. parameter

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