What is the idle speed?

[DelDakota]

When the engine is running, if the throttle pedal is completely released, the engine will be in an idle state. Idle principle: The phenomenon of idling is that the car remains stationary while the engine is running—burning fuel in vain, which is indeed a waste! At this time, the mechanical energy generated by gasoline combustion is consumed by the friction of internal parts. Idle application: On cold mornings, it is necessary to warm up the car. The colder the weather, the longer the time required. To speed up the process, impatient people may pull the throttle hard or temporarily increase the idle speed. This does make the process faster, but at this time, because the cylinder block is too cold, some gasoline droplets adhering to the cylinder wall dilute the oil on the cylinder wall, thinning the oil film formed between the piston and the cylinder wall. Meanwhile, the excessively high speed exacerbates the friction.