A Novel Methodology of Enhancing Vehicle Safety Using …
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Fig. 3 Exposed area of PRV before the valve opens
the force F p1 is greater than the force produced by the spring tension F s , the valve
opens.
Once the valve opens, the core exposes a larger area of itself toward the tire
pressure compared to the former (as depicted in Fig. 4). Let the area be A 2 . Obviously,
Since A 2 > A 1 , the force acting on the core and spring F p2 will correspondingly be
greater than F p1 . This means that a greater amount of force will now act on the core,
and a higher spring force will be required to push it back to the original position. If
this is not taken care of, the blowdown pressure will be too low, which is undesirable.
Hence, reducing the area in which the pressure acts will bring down the blowdown
pressure value.
Fig. 4 Exposed area of PRV after the valve opens