Power flow, function

Power transmission

The term "power flow" refers to the transmission paths of driving power and engine torques. The engine torques are transmitted to the drive wheels via the mechanical hydraulic connection of engine, torque converter, the downstream automatic transmission and rear axle differential.

Power is transferred in the torque converter via the driven impeller by diverting hydraulic fluid to the turbine wheel which is connected to the transmission input shaft.

When the torque converter lockup clutch is engaged, power is transmitted via this mechanical connection.

The gear wheels of the individual planetary gear sets forward the torques generated by the torque converter to the main shaft with the help of the multidisk clutches and multidisk brakes to match the transmission ratio and actuated shift elements.

A reduction in the output speed in low gears leads to lower vehicle speeds with simultaneously increased tractive forces and drive torque at the drive gears.

Further subfunctions are described in separate documents:

 Power flow in 1st gear, function

 Power flow in 2nd gear, function

 Power flow in 3rd gear, function

 Power flow in 4th gear, function

 Power flow in 5th gear, function

 Power flow in 6th gear, function

 Power flow in 7th gear, function

 Power flow in reverse gear