Abstract
A comprehensive mathematical model of a typical
hydraulic power rack and pinion steering system is
developed, and the dynamic characteristics of the
steering system are analyzed. The mechanism,
hydraulic supply lines and the rotary spool valve of a
hydraulic power steering system are included in the
model, and the numerical calculation is conducted to
investigate the sensitivities of the key parameters of the
steering system. The results show that the profile of the
spool valve and the fluctuation of flow rates significantly
affect the dynamic characteristics the steering system.
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