Translations:Internal Combustion Engine/3/en

Engines have a range of rotational speeds that they are designed to operate in. The minimum RPM is the idle speed at which the engine runs on its own. Going any slower causes insufficient combustion rate and the engine shuts down. The maximum RPM is determined by the red line on the RPM gauge, and can be reached by giving too much throttle or faulty operation of the transmission. Going any faster results in damage to the engine, and may be catastrophic.