Epicyclic Gear Unit (2 elements)

INTRODUCTION

The most important elements of an automatic transmission are one or several planetary gears (or epicyclic gears), clutch packs, band brakes and pilot valves.
Epicyclic gears perform several functions:
Coupling between input and output shafts.
At low velocities, it generates high torque at the output shaft.
At high velocities, it reduces the torque at the output shaft.
Rotation direction inversion between the input and output shafts.

EXERCISES AND PRACTICAL POSSIBILITIES

1. Demonstration of the function of an epicyclic gear system.
2. To determine and verify the velocity and torque ratios between the input and output shafts.
3. Study of the mechanical advantage and efficiency of a planetary system.
4. Determination of the angular displacement at the input and output and comparison with calculated ratios.
5. Determination of the minimum force at the input to move a
   weight at the output.
   Gears selection:
6. First gear.
7. Second gear.
8. Third gear.
9. Neutral.
   Power transmission:
10. Checking the relation between the input motor torque and the
    output motor torque.