Planetary gear, animation
Planetary gear, animation |
Function |
To obtain the different gear ratios, the component parts of the planetary gears, such as the sun wheel, planet wheel, ring wheel and planet carrier are locked or released respectively. The friction elements for this are all disc type except for brake B4 which is band type. As there are four different planetary gears, it is possible to obtain a wide range of different ratios.
Planetary gear |
1 = S = Sun gear
2 = P = Planet gear
3 = R = Ring gear
Input power | Output power | Locked component | Gear ratio |
1 | 2 | 3 | Shift down |
3 | 2 | 1 | Shift down |
2 | 1 | 3 | Shift up |
2 | 3 | 1 | Shift up |
1 | 3 | 2 | Reverse |
3 | 1 | 2 | Reverse |