Air spring with function of regulating static stiffness by filler and regulating dynamic stiffness by pressure difference

Abstract

An air spring in a modern automotive suspension system is very important for improving the vehicle smoothness and steering stability and protecting roads and cargoes. In order to expand the stiffness regulation range of the air spring, the mode of connecting a main air chamber and an auxiliary air chamber is adopted, and a throttle valve on the path of the main air chamber and the auxiliary air chamber is changed; a control signal for stiffness regulation is collected by multiple paths of sensors and is processed by a computer, and then an action order is sent out to regulate the stiffness of the air spring. But the control mode has big response time-lag and high cost. Aiming at the problems, the invention develops a novel adaptive air spring with a function of regulating dynamic stiffness based on pressure difference. A pressure signal in an air sac is directly used for controlling the throttling pressure difference on the path of the main air chamber and the auxiliary air chamber to achieve the purpose of continuously regulating the stiffness. The reversed impact pressure difference of the main air chamber and the auxiliary air chamber is utilized to control the throttle valve so as to weaken impact of a lug on a vehicle body. The air spring has the advantages of simple structure, quick and reliable response and low cost, and the static stiffness also can be regulated.

Description

1. Technical field: [0001] The invention relates to an air spring which is used for vehicle air suspension to adjust the static stiffness and the adaptive pressure difference to adjust the dynamic stiffness. This air spring is especially suitable for passenger buses, city public buses, freight vehicles, as well as rail transit vehicles, special vehicles and high-end cars. 2. Background technology: [0002] In order to improve the ride comfort of the car, improve ride comfort and handling stability, and reduce vehicle damage to roads and goods, air springs are widely used in the suspension systems of their transport vehicles in developed countries. 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 springs, semi-active and active air suspension systems have been developed. In the active air suspension...

AI Technical Summary

Problems solved by technology

There are two deficiencies here that will cause the static stiffness value of the air spring to fail to meet people's expectations. One is the design error; the other is the error between the performance parameters of the selected product and the design value.

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