idling RPM

idling RPM

The engine RPM with the throttle set to the minimum or idle position on the ground. Idling RPM varies with altitude; the higher the height, the higher will be the idling RPM.
References in periodicals archive ?
The engine also incorporates higher idling rpm, optimized ignition, and a lean air/fuel mixture at start-up to minimize emissions when the engine is cold, a time when disproportionately high levels of harmful emissions occur.
These efficiencies were achieved at engine idling RPM which translates to attaining twenty miles per hour from start-up with a Torvec infinitely variable transmission equipped vehicle.