Power transmission, function - GF27.10-P-2009AHX

TRANSMISSION 722.930 up to 31.5.11, 722.931 as of 1.6.11 in MODEL 212.0/2 

Power transmission, general 

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 the engine, the wet clutch, the downstream automatic transmission and rear axle differential.

Power transmission in the wet clutch ensues through the nonpositive connection of the internal and external plates, which are pressed together by the clutch piston. The pressure in the clutch piston is regulated through the wet clutch control solenoid valve (Y3/8y9).

The gears of the individual planetary gear sets are used to forward the torque developed by the wet clutch to the transmission output shaft, depending on the gear ratios and actuated shift elements, with the aid of multidisk clutches and multidisk brakes.

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

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, transmission mode "S", function 
• Power flow in reverse gear, transmission mode "C", function