Volume variable air spring auxiliary chamber experiment device and method

Abstract

The invention discloses a volume variable air spring auxiliary chamber experiment device and a volume variable air spring auxiliary chamber experiment method. Inner cavities of a cylindrical shell of an auxiliary chamber are eight sector cylinder chambers with same volume, which are separated by sector plates circumferentially; a clapboard is enclosed on the upper end face of the eight sector cylinder chambers, and is provided with eight small holes opposite to the eight sector cylinder chambers; a movable cover plate is arranged on the upper layer of the cylindrical shell, and is provided with a height sensor; the lower end face of the movable cover plate is vertically fixedly connected with eight plunger pistons respectively in sealed fit with the eight small holes, and the lengths of the eight plunger pistons form an arithmetic progression in turn; an air spring system is connected with a computer through a numerical control electrohydraulic servo vibration testing system; and withthe increase of the heights of the eight plunger pistons, the eight sector cylinder chambers are opened in turn, the influence of different volumes of the auxiliary chamber on the characteristics of the air spring is measured, the air spring can obtain a wider rigidity change range, and the running stability and riding comfortability of a sedan are improved.

Description

technical field [0001] The invention relates to an additional air chamber of an air spring in a vehicle air suspension system, in particular to a test device and a test method thereof. Background technique [0002] At present, the test device for the additional air chamber of the vehicle air spring generally has two structural forms. One is to study the stiffness characteristics of the air spring by adjusting the valve opening. The volume of the additional air chamber of the air spring is fixed, and the change of the air spring stiffness The range is small, and the ride comfort of the vehicle is poor. The other is that the volume of the additional air chamber is changed by injecting hydraulic oil. The response to the change of the volume of the additional air chamber is slow, and adding oil supply equipment to the traditional additional air chamber not only increases the production cost, but also increases the actual installation process. It occupies a certain space, which ...

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Problems solved by technology

[0002] At present, the test device for the additional air chamber of the vehicle air spring generally has two structural forms. One is to study the stiffness characteristics of the air spring by adjusting the opening of the valve port. The range is small, and the ride comfort of the vehicle is poor

The other is that the volume of the additional air chamber is changed by injecting hydraulic oil. The response to the change of the volume of the additional air chamber is slow, and the addition of oil supply equipment to the traditional additional air chamber not only increases the production cost, but also in the actual installation process. It occupies a certain space, which is not conducive to the reasonable arrangement of the air suspension; the leakage prevention of hydraulic oil in the additional air chamber is also difficult to achieve, and it is easy to cause pollution; the cavitation generated by the hydraulic oil will not only generate vibration and noise, but also damage parts

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