Meaning of idling speed | Babel Free

Definitions

The speed, measured in revolutions per minute, of an internal-combustion engine when it is running, but is at rest and without power being applied, typically with transmission in neutral.

Examples

“Heating in the passenger sections is by electricity obtained from the main generator. When heating is dictated by the operation of a thermostat in the roof of the motor coach, engine idling speed is 600 r.p.m. instead of the normal 450 r.p.m. in order to produce a high enough generator voltage output at rest.”

CEFR level