Truck Equipment Glossary - V

VCG
Abbreviation for Vertical Center of Gravity, the point at which half of the gross weight is above and half is below. See Center of Gravity.
 
Vehicle Equipment Safety Commission
The Commission established pursuant to the joint resolution of the U.S. Congress relating to highway traffic safety, approved Aug. 20, 1958 (72 Stat. 635), or as it may be hereafter reconstituted by law.
 
Vehicle Identification Number (VIN)
A 17-character number consisting of arabic numerals, roman letters, or both, that the manufacturer assigns to a vehicle for identification purposes, as required by 49 CFR Part 565.
 
Vehicle Maximum Load on the Tire
That load on an individual tire that is determined by distributing its share of the maximum loaded vehicle weight to each axle and dividing by two. 
 
Volumetric Efficiency
The ratio of air inducted per cycle to the total displacement of the engine. Commonly referred to as the engine’s ability to “breathe.”