5Kojima, E. Devdopment of a quieter variable-displacement vane pump for automotive hydraulic power steering system[J]. International Journal of Fluid Power. 2003,4(2):5- 14.
6KARMEL A. M. Modeling and analysis of the dyrkamics of a variable - displacement vane-pump with a pivoting cam [ J ]. Journal of dynamic systems, measurement, and control. 1988,110(2) : 197 - 202.