Electric control apparatus for a part-time fourwheel drive vehicle.

摘要

In a part-time four-wheel drive vehicle, an electric control apparatus for a transfer device (20) in drive connection to a front or rear differential (40) is arranged to permit selection of the four-wheel drive mode at the transfer device during travel of the vehicle in the two-wheel drive mode only in a condition where travel speed of the vehicle and temperature of lubricating oil in the differential are in a predetermined allowable region (A). The allowable region is defined to permit engagement of a clutch mechanism (20a) in the transfer drive mode without causing any heavy load acting thereon.