Full-time transfer case with synchronized gear reduction unit

Details Full-time transfer case with synchronized gear reduction unit Full-time transfer case with synchronized gear reduction unit

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 48/02 (2006.01) B60K 17/346 (2006.01) B60K 17/35 (2006.01) B60K 23/08 (2006.01) F16H 63/30 (2006.01) F16H 63/40 (2006.01)

Patent

CA 2245853

A power transfer system (10) is disclosed for a four-wheel drive vehicle operable for permitting a vehicle operator to select between various full-time and part-time four-wheel drive modes. The power transfer system (10) includes a transfer case (20) equipped with a gear reduction unit (68) and a synchronized range shift mechanism (104) operable for permitting the vehicle operator to shift on-the-fly for estblishing full-time and part-time high-range and low-range four-wheel drive modes. The transfer case (20) is also equipped with an electronically-controlled slip limiting/torque-biasing arrangement including an interaxle differential (22) and a transfer clutch (44) operable for controlling the magnitude of speed differentiation and torque biasing across the interaxle differential (22).

Un système de transfert de puissance (10) est destiné à un véhicule à quatre roues motrices et fonctionne de manière à permettre que l'utilisateur choisisse entre différents modes permanents ou temporaires à quatres roues motrices. Ce système (10) comprend une boîte de transfert (20) équipée d'un engrenage réducteur (68) et d'un mécanisme synchronisé (104) de changement de gamme de vitesses permettant à l'utilisateur de changer à la volée pour passer dans des modes d'entraînement permanent et temporaire, sur les gammes haute et basse, à quatre roues motrices. Cette boîte de transfert (20) comprend aussi un dispositif à commande électronique de limitation de glissement et d'application de couple, doté d'un différentiel central (22) et d'un embrayage de transfert (44) utilisable pour commander l'ordre de grandeur de la différenciation de vitesse et de l'application du couple transmis par ce différentiel central (22).

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