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Informace o normě:
Označení normy: SAE J3249
Datum vydání normy: 1.7.2026
Kód zboží: NS-1277501
Země: Americká technická norma
Kategorie: Technické normy SAE
Anotace textu normy SAE J3249 :
This recommended practice describes the procedure to measure and report the operating efficiency for all types of constant velocity joints (including fixed and plunging/end motion type joints) used in cars, SUVs, and trucks. This includes halfshaft as well as propshaft applications. This does not apply to non-CV joints. Rotational inertia is not considered within the scope of this recommended practice.
This recommended practice provides a common method to quantify and report the operating efficiency characteristics of a CVJ. This practice does not apply to parasitic losses (spin loss, churning loss, or zero torque loss) as experienced on deactivated AWD/4WD systems. The losses in this condition are significantly less and require higher accuracy than what is required in this recommended practice.
SUBFILE: Automotive
TYPE OF DOCUMENT: Ground Vehicle Standard
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