This paper investigates the catch-up effect that occurs in power steering systems. Catchup effect is when the hydraulic assistance fades away and the driver has to rely on manual torque applied to the steering wheel to perform steering maneuvers; thus significantly less assistance is provided. This can lead to disaster if it occurs in a critical situation for the driver. The catch-up effect can be divided into two types, one static and one dynamic. Both are a result of insufficient flow delivered to the valve; however, the dynamic effect is due to volumetric expansion in the supply line. In this paper, both simulation and measurements of dynamic catch-up are presented. The simulation model is used to further study the compressibility effect in the supply line which includes an Expansion Chamber Attenuator, ECA.
Modeling and validation of power steering systems with emphasis on catch-up effect
Simulation und Validierung hydraulischer Lenkhilfesysteme unter besonderer Berücksichtigung des Aufholeffekts
2005
18 Seiten, 21 Bilder, 9 Quellen
Conference paper
Storage medium
English
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