Torque converter

A torque converter is a adapted form of fluid coupling that is utilized to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating driven load. Like a common fluid coupling, the torque converter usually takes the place of a mechanical clutch, permitting the load to be separated from the power source. As a more elevated form of fluid coupling, nevertheless, a torque converter is capable to multiply torque when there is a significant difference between input and output rotational speed, thus providing the equivalent of a reduction gear.