See Vapour.

Fuel that is broken down to very fine particles and distributed into the intake air stream of an engine.

Fuel that is broken down to very fine particles and distributed into the intake air stream of an engine.

Minute airborne droplets of a liquid or liquid that has been heated to a gas state.

Vapour formation in a fuel line caused by heat. The effect is similar to an air lock and acts to prevent fuel delivery. To clear the vapour lock the fuel line must be bled or allowed to cool.

Variable assist power steering

A carburettor with a variable diameter venturi (choke tube). The variable diameter is obtained by inlet manifold vacuum being applied to one side of a diaphragm or piston and atmospheric pressure to the other side. This arrangement produces a constant depression and relatively accurate fuel metering.

A resistor that can have its value changed manually.

A venturi (narrowing of a tube) that can be changed. Usually refers to a carburettor. See also Variable Venturi Carburettor.

See Variable Choke Carburettor.