Automotive Glossary
Automotive Glossary
Browse the glossary using this index
Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL
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Unsprung MassThe part of the vehicle not supported by the suspension springs. The road wheels, hubs, brakes and part of the suspension system. | |
Unsprung Mass (Weight)The part of the vehicle not supported by the suspension springs. The road wheels, hubs, brakes and part of the suspension system. | |
Up DraftA carburettor where the choke tube (venturi) is fitted vertically and the air enters from the bottom. Upwards movement of air. | |
Upper BeamThe upper of the two headlamp beams. Also driving beam and main beam. | |
Upper Control ArmThe upper and shorter wishbone in an independent suspension system. | |
Upper QuartileData is split into 4 equal quarters. The highest quarter is referred to as the Upper Quartile. For example the Upper Quartile of 100 is the highest 25 of the numbers. | |
UrethaneA type of paint or polymer which results from the reaction of an isocyanate with a hydroxyl containing component. Urethanes are noted for their toughness and abrasion resistance. | |
UVUltra violet. | |
UV StabilizersChemicals added to paint to absorb the ultraviolet radiation present in sunlight. Ultraviolet radiation decomposes the polymer molecules in a paint film and thus UV stabilizers are used to prolong paint life. | |