Positive air flow drive train unit for utility vehicle

Details Positive air flow drive train unit for utility vehicle Positive air flow drive train unit for utility vehicle

B - Operations, Transporting

60

K

B60K 11/06 (2006.01) B60K 17/00 (2006.01)

Patent

CA 2505674

A utility vehicle is provided which has a CVT drive unit. A housing for the drive unit provides an enclosure for the CVT drive components and defines an air flow path. An inlet port associated with the CVT housing includes a fan assembly which provides a source for filtered ambient air flow into the CVT housing. An outlet port associated with the CVT housing provides an exit for the air flow path and equalizes pressure within the enclosure. The interior of the housing is pressurized with ambient air in order to cool the CVT components therein. The pressurized air also creates an air curtain which prevents moisture and debris from intruding into the housing. Preferably the fan is powered separately from the engine of the utility vehicle to ensure positive air flow into the CVT housing even when the engine is in idle mode.

L'invention concerne un véhicule utilitaire pourvu d'une unité de transmission CVT. Le logement de l'unité de transmission constitue un espace fermé pour les composants de transmission CVT et définit une trajectoire de circulation de l'air. Un orifice d'entrée associé au logement CVT comprend un ensemble ventilateur constituant une source de circulation d'air ambiant filtré dans le logement CVT. Un orifice de sortie associé au logement CVT constitue une sortie pour le flux d'air et égalise la pression dans l'espace fermé. L'intérieur du logement est pressurisé avec de l'air ambiant afin de refroidir les composants CVT. L'air pressurisé crée également un rideau d'air empêchant l'humidité et les débris d'entrer dans le logement. Le ventilateur est, de préférence, alimenté séparément du moteur du véhicule utilitaire afin de garantir un débir d'air positif dans le logement CVT, y compris lorsque le moteur se trouve en mode repos.

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