A Power Transfer Unit (PTU) is used in place of a transfer case in which of the following drive systems?

A Power Transfer Unit (PTU) is specifically designed to manage the distribution of power to the wheels in vehicles that utilize front-wheel drive (FWD) platforms, particularly in four-wheel drive (4WD) or all-wheel drive (AWD) systems. In a FWD-based 4WD/AWD system, the PTU serves to redirect power to the rear wheels when needed, such as during changes in traction conditions, enhancing vehicle stability and control.

This technology is distinct from what is found in traditional transfer cases, which are commonly used in more conventional four-wheel drive systems that are often rear-wheel drive based. The PTU allows for a more compact and efficient means of integrating all-wheel drive functionality into vehicles that are fundamentally designed with a front-wheel drive layout. Its design accommodates the nuances of the FWD architecture while improving traction and handling dynamics, especially in varying road conditions. Thus, understanding the application and advantages of a PTU within a FWD-based 4WD/AWD context is crucial for recognizing its role in modern vehicle dynamics.