PTM TRANSFER CASE UTILIZING HYDRAULIC POWER TO PERFORM RANGE/MODE SHIFT AND ON-DEMAND ACTIVE CLUTCH ACTUATION

摘要

A transfer case having an input shaft, a gear assembly operably associated with the input shaft, a primary output shaft, a range selector operably associated with the gear assembly for selectively connecting the input shaft to the primary output shaft. The present invention also includes a secondary output shaft, and clutch assembly operably associated with the secondary output shaft, for selectively transferring rotational force from the primary output shaft to the secondary output shaft, as well as an actuator which is operably associated with at least one valve. The actuator directs fluid through the valve to the range selector for the purpose of changing the rotational speed of the primary output shaft in relation to the input shaft. The range selector is also used to direct fluid to the clutch assembly to transfer rotational force from the primary output shaft to the secondary output shaft.