Power Transmission, Function

Fig 1: Power Transmission, Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The term power transmission refers to the transmission of propulsion power and engine torques. The engine torques are transferred to the drive wheels by means of the mechanical- hydraulic connection between the engine, torque converter and automatic transmission. The torques are converted in the transmission by several planetary gearsets.

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. Via the gear wheels of the individual planetary gearsets, the torques coming from the torque converter, depending on the gear ratio and shift elements actuated, are passed on to the output shaft with the help of overrunning clutches, multi-disc clutches and brakes.

A reduction of the output speed in the low gears provides lower vehicle speeds with high tractive forces and drive torque at the drive wheels.

1. Power Flow In 1st Gear, Function
   
   See POWER FLOW IN 1ST GEAR, FUNCTION  .
2. Power Flow In 2nd Gear, Function
   
   See POWER FLOW IN 2ND GEAR FUNCTION  .
3. Power Flow In 3rd Gear, Function
   
   See POWER FLOW IN 3RD GEAR FUNCTION  .
4. Power Flow In 4th Gear, Function
   
   See POWER FLOW IN 4TH GEAR FUNCTION  .
5. Power Flow In 5th Gear, Function
   
   See POWER FLOW IN 5TH GEAR FUNCTION  .
6. Function Of Power Flow In Reverse Gear Function Of Program Selection "W"
   
   See POWER FLOW IN REVERSE GEAR, PROGRAM SELECTION "W", FUNCTION  .
7. Power Transmission In Reverse Gear, Program Selection "C" Function
   
   See POWER FLOW IN REVERSE GEAR, PROGRAM SELECTION "C", FUNCTION  .
8. Function Of Power Flow In Reverse Gear Function Of Program Selection "S"
   
   See FUNCTION OF POWER FLOW IN REVERSE GEAR FUNCTION OF PROGRAM SELECTION "S"  .