Based on ECAS, this paper intended to develop a modular air suspension height control system with WABCO4728800010 two-position three way solenoid valves and Free scale MC9S12D64 microprocessor as its core components. And a simulation test was conducted in MATLAB/Simulink environment. The air suspension height control strategy of this system was divided into four modules: start control module, dynamic adjustment module, manual adjustment module and errors adjustment module, which were controlled by module select switch. Simulation tests indicated that the air suspension height control strategy is featured by its logical control accuracy and debug convenience, and the modular design greatly reduced the system complexity and software development cycle and costs as well. Copyright © 2014 IFSA Publishing, S. L.

A 1/4 vehicle model's test bench of electronically controlled air suspension is designed by CATIA modeling and finite element analysis,which can not only measure the air bag characteristic curve,but also simulate the change of air bag's height caused by the static load,dynamic load and the alternating load so as to observe the system's response to keep the constant vehicle height.The characteristic test of the air spring shows that this test bench meets the design requirements and provides a platform for the development of air suspension control strategy.