Standard
Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss
2020-12-30
CURRENT
J3039_202012
This SAE Recommended Practice covers power transfer units (PTUs) used in passenger car and sport utility vehicles to support all wheel drive (AWD) operation. PTUs are typically full-time use geared devices (see 3.1). Some PTUs have additional features such as part-time on-demand capability via electronically actuated disconnect features, and other configurations are possible.
