Design For Four-links Guiding Mechanism Of Air Suspension Based On The Simulation Technology

In recent years, with the introduction of High-grade passenger cars’ manufacturing technology in order to satisfy the increasing comfortableness demand and also the issuing and implementation of national operation passenger car grade standard, air suspension gradually began to be applied. Air suspension can reduce vehicle vibration frequency and reduce the damage to the road surface. When air suspension is used in conjunction with height value, the vehicle body height can be adjusted, which make passengers get on and off the bus more conveniently. However, up to now, a lot of work has been done about the air suspension and height value, the work of design an calculation of the guiding mechanism of the suspension and how the guiding mechanism influence the vehicle performance, especially the research of the guiding mechanism of air suspension are absence.Because air suspensions only transfer vertical, guiding mechanisms are indispensable to transfer the longitudinal force and lateral force and torque. Therefore, the research of the guiding mechanism of air suspension is great importance to the vehicle handling and stability.The main content of this paper is the analysis of one domestic air suspension’s guiding mechanism, especially the analysis of the arrangement of its key component-the car’s torque rod and the impact of joints’stiffness property to the suspension’s performance, experiments are also performed to testify the related results. As the complexity of the air suspension geometry and dynamic problems, we build the digital prototype of the four link rods type suspension by ADAMS, and analysis the hard spot of the Rear axle elevation the axle steering the four-bar linkage mechanism and the whole bias and deflection character in order to solve the problem encountered in the application of theoretical analysis. The Finite Element Analysis of the guide mechanism was simulated by ABAQUS software, in order to check the strength of the rod, analysis and optimize the structure and stiffness of the torque rod ball-joint. Finally, using the laboratory bench test to verify the performance of the guide mechanism.By combining simulation technology and test methods, the design of the air suspension oriented institutions has practical values in shorting the production cycle, responding quickly to market, and reducing the cost of production in the life cycle, improving the quality of production.