A differential is a key component in a vehicle’s drivetrain, especially in cars and race cars. Its main function is to split the power from the engine and distribute it to the two wheels (or more), allowing them to rotate at different speeds, which is crucial when the vehicle is cornering.

The working principles of a differential are as follows:

1. Power distribution to the left and right wheels: When driving straight, both wheels rotate at the same speed because they cover the same distance.

2. Speed adjustment when cornering: When one wheel (the inner wheel during a turn) needs to rotate slower because it covers a shorter distance, the other wheel (the outer wheel) must rotate faster to cover the greater distance.

Without a differential, when turning a corner, the vehicle would experience slipping or imbalance because both wheels would try to rotate at the same speed, which is not ideal for cornering.

In the case of flexible power transmission design, the mentioned offset refers to designing the rear axle’s position to allow for slight adjustments. This ensures the rear differential is properly aligned for optimal performance. Chain tension control is also critical in ensuring efficient power transmission.