Driving Force And Damping Characteristics Of ADS Valve Of Adjustable Shock Absorber

With the rapid development of China's economy,people's requirements of driving safety,stability and comfort are getting higher and higher.Ordinary shock absorber's damping force is fixed and it can gain the best driving performance according to a specific traffic conditions.At present,adjustable damping shock absorbers have been used in high-end luxury cars and can continue to get the best driving performance in the face of different road conditions.It is imminent to study an ADS valve adjustable damping shock absorber for low-end vehicles.So the research on ADS valve that plays a key role in dampling adjustment has practical significance for the development of adjustable damping shock absorber.In view of this,the paper has conducted the thorough research from the following aspects.First,the ADS valve adjustable damping shock absorber is designed and the structure is designed for the ADS valve,which plays a key role in its damping adjustment process.The theoretical and experimental research on the driving force of ADS valve was carried out.On one hand,the driving force of ADS valve's electromagnet under no-load conditions is analyzed theoretically.And the test system for testing driving force of electromagnet is designed and verify the correctness of the theoretical analysis.On the other hand,the mathematical model of the driving force of ADS valve under rated load is established and the simulation model is built through MATLAB/Simulink.And the test bench for the driving force of ADS valve under rated load is built,verify the correctness of the theoretical analysis and measure out the minimum electromagnetic force required to the switch between other gears in ADS valve.Then,when the ADS valve is chosed,opened or opened to the maximum,the mathematical model of damping characteristics in the fourth damping level is established based on the knowledge of fluid mechanics theory.The simulation model is built through using MATLAB/Simulink.The various parameters have the influence of damping characteristics such as oil density,oil viscosity temperature,piston bore diameter,valve pieces number and thickness are analyzed.Finally,the electro-hydraulic servo test platform is built and test the damping characteristics of the ADS valve.For one thing,the correctness of the theoretical analysis is verified.For another thing,the correctness of the influence rule that " valve piece thickness" and "valve piece number" have on the damping characteristics of ADS valve.And the experimental research of the ADS valve adjustable damping shock absorber is conducted and obtain the performance characteristics of the adjustable damping shock absorber under different stalls,which indicate that the shock absorber's performance is good and meet the requirements.