GF27.50-P-2101AHK Ravigneaux Gear Set, Component Description

GF27.50-P-2101AHK Ravigneaux gear set, component description
- Transmission 722.904/906/907/999

Component Identification:

Location
The Ravigneaux gear set is located in the mechanical part of the transmission.

Task
The task consists of power transmission and the formation of different ratios.

Component Identification:

The Ravigneaux-gear set used consists of 2 ring gears, a planet carrier, a sun gear as well as short and long planetary gears.

Function
The elements ring gears, sun gear and planet carrier of the Ravigneaux gear set used are driven or stalled alternately via the shift elements of multi-disk clutch and multi-disk brake. In the process the planetary gears can turn on the internal toothing of the ring gears and on the outer toothing of the sun gear. This allows for a variety of gear ratios and the reversal of the rotation direction without the need for moving gear wheels or shift collars.

The torque conversion and rpm conversion takes place corresponding to the lever ratios or the ratio of the number of teeth of the driven to the driving gear wheels and is designated as the gear ratio i. With several planetary gear sets connected behind each other the overall ratio is given by the multiplication of part ratios.

If 2 components of the Ravigneaux gear set are rigidly connected to each other, the planetary set is blocked and rotates as a closed unit.

Advantages of a Ravigneaux gear set:
- Shifting ability under load
- Several ratios can be produced
- Constant meshing of the gears
- Simple direction reversal
- High efficiency
- Coaxial location of input and output
- Compact design
- Combined 2 single planetary gear systems in one unit