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Based on the working characteristics of air spring, vehicle active rollover control system is studied. First , vehicle rollover forecast algorithm is designed by using the vehicle rollover forecast technique TTR. Then vehicle active rollover control system is designed with air spring inflation/deflation characteristics. Simulation results show that the design of vehicle active rollover control system can predict rollover risk, achieve the timely warning of vehicle rollover, and can adjust the air spring stiffness timely, improve vehicle lateral stability, reduce vehicle rollover accident under the condition of rollover risk.

In order to improve the performance of vehicle steering system and reduce the system energy consumption, the structure and operation principle of an electro-hydraulic power steering (EHPS) system with a electro-hydraulic steering pump are described, on this basis, with the function requirement of steering system, and by using vehicle design and fluid drive theory, the design method of this electro-hydraulic steering pump and its matching with the vehicle are presented. Through building electro-hydraulic steering pump test platform to test its performance parameters, the results prove the correctness and effectiveness of this kind of design method, provide the basis for subsequent development of the electronic control system.