Automotive Glossary
Automotive Glossary
Browse the glossary using this index
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UnderwrittenSign and accept liability (legal). | |
UnidirectionalMove in one direction only. | |
Unidirectional ClutchA clutch, used in starter motors for example, to only allow drive to pass in one direction. | |
Union NutA hollow nut used to secure hydraulic pipes. | |
Unit-body ConstructionVehicle body and chassis constructed as a single unit. As distinct from a separate chassis and body construction. Also unitary body construction. | |
Unitary Body ConstructionVehicle body and chassis constructed as a single unit. As distinct from a separate chassis and body construction. Also unit-body construction. | |
Universal JointsRotating shaft coupling that permits angular axial displacement. Some types will also operate with linear misalignment of axes. | |
UnladenNot carrying a load. | |
Unleaded PetrolPetrol without any added lead to improve the octane rating. | |