A Novel Methodology of Enhancing Vehicle Safety Using …
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5.2 Understanding the Existing Product
5.2.1 Parts
A general PRV is composed of seven major parts, namely
(a) Body (which contains the core, spring, and ‘O’ ring)
(b) Nut (to tighten the valve)
(c) Core (which acts as the plunger)
(d) Spring
(e) Screw (to adjust the spring tension)
(f) Sealant ring
(g) ‘O’ ring.
5.2.2 Understanding the Functions of the Parts
(a) Body (depicted as dark blue line in Fig. 2)
The body of the PRV houses the core, the spring, the screw, the ‘O’ ring, and
sealant ring. The sealant ring (movable) is attached to the core, and the ‘O’
ring is in the lower outer surface of the body to prevent air leaks from valve
loosening (stationary). The body of the PRV has a diameter which is exactly
same as the existing commonly used inflation valves V3-20-6 or V3-22-1. This
measure was taken in order to make sure that no additional tool is required for
piercing the valve hole in the rim during manufacturing of the wheel. The body
of the PRV has external threads on it, to facilitate the nut. It has internal threads
Fig. 2 Parts of a PRV
423
5.2 Understanding the Existing Product
5.2.1 Parts
A general PRV is composed of seven major parts, namely
(a) Body (which contains the core, spring, and ‘O’ ring)
(b) Nut (to tighten the valve)
(c) Core (which acts as the plunger)
(d) Spring
(e) Screw (to adjust the spring tension)
(f) Sealant ring
(g) ‘O’ ring.
5.2.2 Understanding the Functions of the Parts
(a) Body (depicted as dark blue line in Fig. 2)
The body of the PRV houses the core, the spring, the screw, the ‘O’ ring, and
sealant ring. The sealant ring (movable) is attached to the core, and the ‘O’
ring is in the lower outer surface of the body to prevent air leaks from valve
loosening (stationary). The body of the PRV has a diameter which is exactly
same as the existing commonly used inflation valves V3-20-6 or V3-22-1. This
measure was taken in order to make sure that no additional tool is required for
piercing the valve hole in the rim during manufacturing of the wheel. The body
of the PRV has external threads on it, to facilitate the nut. It has internal threads
Fig. 2 Parts of a PRV