Power flow, function - GF27.10-P-2009AHS

TRANSMISSION 722.9 in MODEL 216.3 as of model year 2009 / YoM 08

TRANSMISSION 722.9 in MODEL 216.3 (except 216.374) as of Model Year 2011 /YoM 10 model refinement package

TRANSMISSION 722.9 in MODEL 221.0 as of model year 2009 / YoM 08

TRANSMISSION 722.9 in MODEL 221.0 (except 221.095)

TRANSMISSION 722.9 in MODEL 221.0 (except 221.074) as of Model Year 2011 /YoM 10

TRANSMISSION 722.9 in MODEL 221.1 as of model year 2009 / YoM 08

TRANSMISSION 722.9 in MODEL 221.1 (except 221.195)

TRANSMISSION 722.9 in MODEL 221.1 (except 221.174) as of Model Year 2011 /YoM 10

Fig 1: Identifying Power Flow Function Diagram

Courtesy of MERCEDES-BENZ USA

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 between the engine, torque converter, the downstream automatic transmission and 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.

If the torque converter lockup clutch is engaged, the power flows via this mechanical connection to the transmission input shaft. Via the gear wheels of the individual planetary gear sets, the torques coming from the torque converter, depending on the gear ratio and shift elements actuated, are passed on to the transmission output shaft with the help of the 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

	Power flow in 1st gear, function		GF27.10-P-3011AHS
	Power flow in 2nd gear, function		GF27.10-P-3012AHS
	Power flow in 3rd gear, function		GF27.10-P-3013AHS
	Power flow in 4th gear, function		GF27.10-P-3014AHS
	Power flow in 5th gear, function		GF27.10-P-3015AHS
	Power flow in 6th gear, function		GF27.10-P-3021AHS
	Power flow in 7th gear, function		GF27.10-P-3026AHS
	Power flow in reverse gear, transmission mode "S", function		GF27.10-P-3030AHS
	Power flow in reverse gear, transmission mode "C", function		GF27.10-P-3031AHS