Wednesday, 26 February 2020, 5:10 PM
Site: IMI eLearning
Course: IMI eLearning (IMI eLearning)
Glossary: Automotive Glossary
U

Underwritten

Sign and accept liability (legal).

Unequal Wishbones

Suspension type with an upper wishbone shorter than the lower wishbone. The geometry of this layout keeps the wheel camber reasonably constant during suspension movements. Also SLA suspension.

Unidirectional

Move in one direction only.

Unidirectional Clutch

A clutch, used in starter motors for example, to only allow drive to pass in one direction.

Union Nut

A hollow nut used to secure hydraulic pipes.

Unit-body Construction

Vehicle body and chassis constructed as a single unit. As distinct from a separate chassis and body construction. Also unitary body construction.

Unitary Body Construction

Vehicle body and chassis constructed as a single unit. As distinct from a separate chassis and body construction. Also unit-body construction.

Universal Joints

Rotating shaft coupling that permits angular axial displacement. Some types will also operate with linear misalignment of axes.

Unladen

Not carrying a load.

Unleaded Petrol

Petrol without any added lead to improve the octane rating.