Comparison of train values of pgt for different structural aspects like symmetry, compactness and driver speed

Automatic transmission is used to maintain the equilibrium between power and torque produced by the engine. The power produced by the engine is transmitted to drive wheel through transmission unit, reduction unit and differential. A desired speed ratio, kinematic and dynamic requirements can be fulfilled by the equilibrium of torque and power. Accurate speed ratio’s can be achieved by using Planetary Gear Trains which are used to transmit motion between two or more shafts.