(Multiplate Clutch, Basic Function - GF27.51-P-2003A)
Model All with Transmission 725
Example illustration of automatic Transmission with multiplate clutches
Shown on automatic Transmission with multiplate clutches
Overview
This document contains information on:
- General
- Function
General
A multiplate clutch (1, 2, 3) distributes the contact force over several friction surfaces between the individual inner plates (6) and outer plates (5) and this consequently establishes a frictional connection.
Function
The Transmission achieves different gear ratios via different combinations of sun gear, ring gear and planetary gears. The sun gear, internal gear and planetary gears each have their own shaft, which is frictionally connected or disconnected via the respective multiplate clutch (1, 2, 3).
A multiplate clutch (1, 2, 3) consists of several inner plates (6) on an inner plate carrier and outer plates (5) on an outer plate carrier alternating in series. Inner plates (6) and outer plates (5) together form the plate package. The inner plates (6) in multiplate clutch K38 (2) and K27 (3) are coated on both sides with friction linings. In multiplate clutch K81 (1), however, the outer plates (5) are coated with friction linings. The contact pressure of the inner plates (6) and outer plates (5) is achieved with oil pressure. The outer plates (5) are connected to the respective hollow shaft by a tooth system.
During the journey, the electrohydraulic controller unit actuates different oil holes and enables the processes described below. The torque converter lockup clutch separates the force flux on the Transmission input side before the shift operation in order to enable different gear ranges. The multiplate clutch (1, 2, 3) opens or closes by applying oil pressure. A frictional connection of the gearwheels changes the gear ratio between the Transmission input and the main shaft at the Transmission output.