torque is a special force that causes an object to rotate. the engine torque refers to the torque output by the engine from the crankshaft end. under the condition of fixed power, it is inversely proportional to the engine speed. the faster the speed, the smaller the torque, and vice versa. it reflects the load capacity of the car within a certain range. the external torque is called torque or external couple moment, and the internal torque is called internal couple moment or torque.

torque: t＝f*d

f = force

d = moment length