Hydraulic coupling in automotive applications

Hydraulic coupling has been applied to early automotive semi-automatic transmission and automatic transmissions. Coupling of the pump wheel and the engine flywheel is connected to the incoming power from the engine crankshaft. In some cases, strictly speaking,   Fluid coupling functionis part of the flywheel, in this case, the hydraulic coupling is also known as hydraulic flywheel. Turbine and associated transmission input shaft. Fluid between the pump wheel and turbine circulation, so that the transmission torque transmitted from the engine to drive the vehicle forward. In this regard, the role of the hydraulic coupling is very similar to the mechanical clutch manual transmission. As fluid coupling can not change the size of the torque, the torque converter has been replaced.