Power flow in 4th gear, function - GF27.10-P-3014AHO

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2016 Mercedes-Benz E63 S AMG, 2016 Mercedes-Benz E400, 2016 Mercedes-Benz E350, 2016 Mercedes-Benz E300, and 2016 Mercedes-Benz E250. However, it is still accessible from the selected car via links, so may be relevant.

TRANSMISSION 724.2 in MODEL 212

Fig 1: Transmission Power Flow Diagram (4th Gear) - Shown On Model 212

Courtesy of MERCEDES-BENZ USA

Function requirements for power flow in 4th gear, general

Circuit 87 (connected circuit 15) ON
Internal combustion engine running and/or electric machine (A79/1) ON

Power flow in 4th gear, general

The following multidisk brakes and multidisk clutches are engaged:

Multidisk brake B2 (43)
Multidisk clutch K1 (46)
Multidisk clutch K2 (47)

In 4th gear, the power flows through the following gear sets:

Ravigneaux gear set
Rear single planetary gear set
Front single planetary gear set

Ravigneaux gear set

Due to the engaged multidisk clutch K1 (46) the components of the Ravigneaux gear set are locked together and pass on the transmission input torque and transmission input speed unchanged to the ring gear (9).

Rear single planetary gear set

The engaged multidisk clutch K2 (47) means that the rpm of the ring gears (9, 12) are the same. As a result the rear single planetary gear set is locked and not actively involved in the gear ratio.

Front single planetary gear set

Due to the engaged multidisk clutch K2 (47) the ring gear (12) is driven at transmission input speed. The planetary gears (52) roll on the stalled sun gear (14) and transfer the increased torque and reduced rotational speed to the transmission output shaft via the planet carrier (13). The transmission output shaft thus rotates with reduced transmission input speed in the direction of rotation of the engine.

Overview of system components for automatic transmission hybrid drive

GF27.10-P-9993AHO