Double-air-spring comprehensive performance test bench

Abstract

The invention discloses a double-air-spring comprehensive performance test bench, belonging to the technical field of vehicle engineering. The dynamics problems of key components which are a height valve, a pressure valve and an anti-rolling torsion bar in an air spring in the process of vehicle running can be effectively simulated. The double-air-spring comprehensive performance test bench comprises a multi-direction actuator working table, an additional air chamber, an air inflation and exhaustion system and counterweights, and an upper end counterweight only limits longitudinal motion. Multi-dimensional and multiphase excitations are applied to double air springs, under the different temperature conditions, the load, deflection change, and vehicle lateral and vertical acceleration and displacements of the air springs under different physical parameter conditions are measured, the dynamical parameters of the air spring such as every direction dynamic rigidity, a damping ratio, a displacement transfer ratio and an acceleration transfer ratio are calculated according to vibration performance parameters, two-point control and four-point control are compared, thus an air spring dynamics performance test is completed, and the operation stability parameters of the vehicle is obtained. The double-air-spring comprehensive performance test bench is mainly used for a double-air-spring comprehensive performance test.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering, in particular to a dynamic and static characteristic testing device of an air spring for a vehicle. Background technique [0002] With the increase of vehicle speed and increasingly stringent requirements for comfort, air springs have been widely used because of their good stiffness nonlinearity and shock absorption performance. Its good dynamic performance makes it play a vital role in improving the vehicle's running speed and ride comfort. The stiffness and damping characteristics of the air spring are affected by many physical parameters, temperature and actual working conditions. Due to the material nonlinearity, geometric nonlinearity and contact nonlinearity of the air spring, the dynamic analysis of the air spring becomes more difficult. Therefore, there is an urgent need for a test method and test equipment that can comprehensively consider the influence of the ambient temper...

AI Technical Summary

Problems solved by technology

The stiffness and damping characteristics of the air spring are affected by many physical parameters, temperature and actual working conditions. Due to the material nonlinearity, geometric nonlinearity and contact nonlinearity of the air spring, the dynamic analysis of the air spring becomes more difficult. Therefore, there is an urgent need for a test method and test equipment that can comprehensively consider the influence of the ambient temperature, the volume of the air spring body, the volume of the additional air chamber, the diameter of the orifice, and the length of the connecting pipeline on the dynamic characteristics of the air spring. Perform a complete dynamic study of an air spring

[0003] The traditional test method is mainly for the dynamic test of a single air spring, which cannot simulate the role of the key components in the air spring - height valve, differential pressure valve and anti-roll torsion bar in the process of vehicle operation

And there is no complete double air spring test bench at present

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