SYSTÈME DE TRANSMISSION POUR VÉHICULE À QUATRE ROUES MOTRICES

摘要

A transfer (22; 200) for a four-wheel drive vehicle, the four-wheel drive vehicle configured to disconnect a propeller shaft from a power transmission path between an auxiliary drive wheels and a driving power source when the four-wheel drive vehicle travels by two-wheel drive, includes a second output rotating member (44) and an oil pump (120). The second output rotating member (44) is configured to output a driving power to the propeller shaft. The oil pump (120) is configured to rotationally drive in conjunction with rotation of the second output rotating member (44) via a first one-way clutch. The first one-way clutch is configured such that the oil pump supplies a lubrication oil to a wet clutch (48) when the four-wheel drive vehicle travels forward by the four-wheel drive. The oil pump is configured to stop supplying the lubrication oil to the wet clutch (48) when the four-wheel drive vehicle travels forward by the two-wheel drive.