Research of Parameters Matching of Air Suspension on Bus

In order to confirm the coefficient of shock absorber matching with air suspension,the thermodynamic theory of air spring is deduced,then the mathematic expression of stiffness and nonlinear force of air spring is achieved and the SIMULINK model of air spring is built;With the application of dynamical knowledge of vehicles,the five-degree mathematical model of half car is built after appropriate simplification of the passenger car.On this basis,the damping coefficient of shock absorber is simulated and analyzed on typical conditions.A reasonable damping value of shock absorber is gained according to the RMS acceleration of seat above the rear axis and results of simulation.By experiment validation of correlated ride comfort,the matching is helpful for better ride comfort,and instructive for the confirming air suspension parameters.