The patented technology allows adjustment of the PCV system's flow rate, as well as the vacuum level where the valve transitions from idle to cruise mode. See All 3 Photos ...

The flow rate of a PCV valve is ... Flow Adjustable PCV valve for our 455 was measuring its manifold vacuum at hot idle. We then referenced that with the engine's displacement on a chart in ...

Through these, shear-rate-over-time graphs were calculated and extremal points were averaged over all frames and all positions along the vessels measured to yield one value per fish (Fig. 2f–k).