What does n/min mean on a car?

[DelNaomi]

n/min represents rotational speed, which stands for revolutions per minute; it is denoted by the symbol "n". Its international standard unit is r/S (revolutions per second) or r/min (revolutions per minute), and it can also be expressed as RPM (revolutions per minute, mainly used in Japan and Europe, while China adopts the international standard). When the unit is r/S, its value is equal to frequency, i.e., n=f=1/T, where T is the period of circular motion. Relevant information about the transmission is as follows: 1. Introduction: A device that changes the speed ratio and direction of motion. It is used to alter the torque, speed, and direction of motion transmitted from the driving shaft to the driven shaft under different working conditions. A gear-driven transmission generally consists of a housing and several gear pairs. 2. Function: While driving, to adapt to different working conditions, the car's driving force and speed need to vary within a certain range. However, the existing engine's torque and speed variation range cannot meet this requirement, hence the transmission is installed.