ML 55 AMG (163.174) V8-5.5L (113.981) (2001)
Component Illustration
Location
Three multiple-disc brakes, the front, middle and rear multiple disc brakes B1, B3 and B2, are located in the planetary gear sets in the transmission
housing.
Task
Brace the ring gear, sun gear or planet carrier of a planetary gear set against the transmission housing in order to transmit the drive torque.
Design
A multiple-disc brake consists of a number of internally toothed discs (10) on an internally toothed disc carrier and externally toothed discs (9) on an
externally toothed disc carrier, which is rigidly connected to the transmission housing.
Function
If the piston (B1a) on multiple-disc brake B1 is subjected to oil pressure, it presses the internal and external discs of the disc set together. The
internally toothed disc carrier (B1c) locks the sun gear (V1) against the housing. The planet gears (V2) turn on the sun gear (V1).
If the multiple-disc brake B2 is actuated via the piston (B2a), the piston compresses the disc set. The internally toothed disc carder (B2c) locks the sun
gear (M1) against the housing. The planet gears (M2) turn on the sun gear (M1).
If the multiple-disc brake B3 is actuated via the piston (B3a), the planet carrier (H3) and the ring gear (M4) are locked. When the multiple-disc brake
B3 is actuated, the direction of rotation is reversed.
Related Information
Multi-Plate Clutch
Location/Task/Design/Function