Variable Assist Power Steering (VAPS)

Fig. 2 Electronic Variable Orifice System:

Fig. 3 Electronic Variable Orifice System:

The electronic variable orifice system, Figs. 2 and 3, is designed to vary the flow from the power steering pump based on vehicle speed and the rate of steering wheel rotation. The system provides full assist at low speed for light parking effort and minimum assist at high speed for good road feel and directional stability. In the event of system failure, full assist is provided.