Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss

Standard [NEW]

SAE J 3039:2025-05-23

Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss

Publication date
2025-05-23
Original language
English
Pages
12

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Publication date
2025-05-23
Original language
English
Pages
12

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Short description

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.
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