Air spring with stiffness adjusted by filler and pressure and step-pressure buffer

Abstract

The invention relates to an air spring with stiffness adjusted by filler and pressure and step-pressure buffer. The air spring is of the utmost importance to enhance the smoothness and the comfort of a vehicle, protect roads and freight and limit overfreight. For the type-matching of the static stiffness of the air spring, people neglect that the static stiffness adjustment is needed because difference exists between stiffness of a selectable standard series airbag and required stiffness of a particular vehicle. Difficulty in the dynamic stiffness adjustment of the air spring is frequently resulted from the mismatch of the static stiffness for the airbag. In a passive type air suspension system, the mismatch of the static stiffness of the airbag is the important reason which results in severe lateral motion in vehicle operation. The traditional dynamic stiffness adjustment is realized by connecting a primary air chamber with a secondary air chamber, and adjusting a throttling port on a passage between the primary air chamber and the secondary air chamber to change the pressure difference when air flows between the primary air chamber and the secondary air chamber. The stiffness adjustment system does not change the volume of the air chambers in an adjustment process, thus the difficulty for adjust the stiffness is big. Aiming at the problems, the invention develops the novel air spring. The air spring provided by the invention has the advantages of adjustability for static / dynamic stiffness, simple structure, low cost and convenience and practicality.

Description

1. Technical field: [0001] The invention relates to an air spring for a vehicle air suspension. The air spring with static stiffness filling adjustment and dynamic stiffness adaptive pressure difference and volume combination adjustment plus step pressure buffering is especially suitable for passenger buses and urban public transport buses. It is suitable for large freight trucks and rail transit vehicles, as well as special vehicles and limousines. 1. Background technology: [0002] In order to improve the ride comfort of the car, improve the comfort of the ride, and reduce the damage of the vehicle to the road and goods, developed countries have widely used air springs in the suspension systems of their transport vehicles. In recent years, my country is also vigorously promoting and mandating the use of air springs. In the continuous development of air spring technology, in order to further improve the stiffness adjustment characteristics of air spring, so that it is more...

AI Technical Summary

Problems solved by technology

This adjustment of stiffness is not continuous

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