What function does a differential serve within a vehicle's power system?

• A. To increase engine power
• B. To allow for the outer wheels to rotate faster than the inner wheels during turns
• C. To decrease fuel consumption
• D. To reduce engine vibrations

Answer: (B)

A differential plays a crucial role in a vehicle’s power system, particularly during cornering. When a vehicle turns, the outside wheels need to cover a larger distance than the inside wheels. The differential allows for this difference in wheel speed, enabling the outer wheels to rotate faster than the inner wheels. This adjustment is fundamental for maintaining traction and control while steering, as it prevents tire wear and enhances the overall handling of the vehicle.

In contrast, options that mention increasing engine power, decreasing fuel consumption, or reducing engine vibrations do not accurately describe the specific function of the differential. While these factors are important in a vehicle's performance, they pertain to different components and systems, such as the engine's design, fuel management systems, or balance and mounting techniques that isolate vibrations. The primary purpose of a differential is distinctly related to the management of wheel speed during turns, confirming why the provided answer is the most appropriate choice.