Multiple Disc Brake

LOCATION
- With the planetary gear sets in the transmission housing three multiple-disc brakes are arranged as the front, center and rear multiple-disc brake B1, B3 and B2

TASK
- To support the internally-geared wheel, sun gear or planet carrier of a planetary gear set against the transmission housing to transmit the drive torque.

DESIGN
- A multiple-disc brake consists of several inner multiple-discs (10) on an inner multiple-disc carrier and outer multiple-discs (9) on an outer multiple-disc carrier which is rigidly connected to the transmission housing.

FUNCTION
- If oil pressure is applied to the piston (B1a) at the multiple-disc brake B1, this presses together the inner and outer multiple-discs of the multiple-disc pack. The sun gear (V1) is fixed at the housing via the inner multiple-disc carrier (V1). The planet gears (V2) roll on the sun gear (V1).

- If the multiple-disc brake B2 is engaged via the piston (B2a), this presses the multiple-disc pack together. The sun gear (M1) is fixed at the housing via the inner multiple-disc carrier (B2c). The planet gears (M2) roll on the sun gear (M1). If the multiple-disc brake B3 is engaged via the piston (B3a), the planet carrier (H3) and internally-geared wheel (M4) are fixed. The direction of rotation reverses when the multiple-disc brake B3 is engaged.

Also Refer To:
- Location Of Mechanical Components. Location of Automatic Transmission Mechanical Components
- Planetary Gear Set. Function of Planetary Gear Set
- Multi-disc Clutch. Multiple Disc Clutch

SURVEY OF TRANSMISSION RATIOS WITH SHIFT ELEMENTS OPERATED