Magneto-rheological strut with integrated air spring

Abstract

The invention discloses a magneto-rheological sliding column integrated with an air spring, and aims to solve the problem that damping force for compression stroke of a magneto-rheological damper is not provided sufficiently. The magneto-rheological sliding column consists of a magneto-rheological damper sliding column, an external air spring and an air supply pressure-regulating device, wherein the magneto-rheological damper sliding column is coaxially mounted inside the external air spring; and the air supply pressure-regulating device is connected to an external air spring pipeline. A damper main piston is in sliding seal fit with a damper working cylinder; the lower end of a damping force output rod is connected with the damper main piston; the upper part of the damping force output rod passes through a sliding column upper end cover and an air spring pressure plate, and is in sealing connection with the sliding column upper end cover and is in threaded connection with the air spring pressure plate; the sliding column upper end cover and an air spring housing are respectively fastened at upper and lower ends of the damper working cylinder; an air spring piston and a floating piston are sealed and mounted between the damper working cylinder and the air spring housing respectively; and the lower end of the air spring pressure plate passes through the sliding column upper end cover and is in contact with the upper end surface of the air spring piston.

Description

technical field [0001] The invention relates to a magneto-rheological sliding column, more precisely, the invention relates to a magneto-rheological sliding column integrated with an air spring, which is used in a vehicle suspension system. Background technique [0002] In the modern automobile structure, the suspension is an essential system of the vehicle, it is a necessary structure connecting the body and the wheels. Shock absorbers and springs are extremely important components that transmit and generate force in a suspension. Among them, the spring is responsible for alleviating the impact vibration of the road surface and improving the comfort of the vehicle, and the shock absorber is responsible for converting the vibration energy of the vehicle into heat energy for attenuation. Both of them play a vital role in improving the ride comfort of the vehicle. [0003] As a kind of suspension spring, air spring can freely adjust the vehicle height and spring height, which...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the gas pressure of the compressible air chamber in the compression stroke, the shock absorber with this structure cannot produce sufficient damping force, so at the high speed stage, it is easy to generate chamber vacuum and graphic defects

[0005] After searching the patent literature, for example, U.S. Patent No. US6260675B, announcement date 2001.07.17, the applicant Delphi Technologies, Inc., named "Magnetorheological fluid damper", the magnetorheological fluid damper described in the technical solution of the application , using a single cylinder shock absorber scheme, when the shock absorber is in the compression stroke, if the pressure in the air chamber is not enough to push the liquid to flow through the piston, the stretching chamber of the shock absorber will not be replenished with enough oil , a brief vacuum is created, the pressure is reduced, and when the shock absorber is re-stretched, the stretch stroke damping cannot be produced, resulting in a graphic defect of the shock absorber

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