Translations:Internal Combustion Engine/3/en

There is a range of rotational speeds that engines are designed to operate in. The minimum RPM is the speed at which the engine runs on its own, or idles. Going any slower that that causes insufficient combustion rate and the engine can shut down, or stall. The maximum RPM is marked by a red line on the RPM gauge, and can be reached by giving too much throttle, or with faulty operation of a transmission . Going any faster than that leads to engine damage , which may be catastrophic.