Patent ID: 8483921
Filing Date: 2013-07-09
Classification: B60K,F16H

Abstract:
1. A two/four-wheel drive switching control apparatus for a traction-transmitting part time four-wheel drive vehicle, the traction-transmitting part time four-wheel drive vehicle including: a traction-transmitting transfer which is capable of directing appropriately part of a torque toward main driving wheels to left and right auxiliary driving wheels; and a gear clutch configured to separate at least one of the left and right auxiliary driving wheels from an auxiliary driving wheel drive train in a non-transmitting state of the transfer, and the two/four-wheel drive switching control apparatus comprising: two-wheel→four-wheel drive switching request detecting means for detecting an occurrence of a two-wheel→four-wheel switching request from a two-wheel drive of the vehicle to a four-wheel drive thereof; vehicle travel detecting means for detecting that the vehicle is being traveled; traveling-time two-wheel→four-wheel drive switching means, responsive to signals from the vehicle travel detecting means and the two-wheel→four-wheel drive switching request detecting means, for engaging the gear clutch after the traction-transmitting transfer is directed into a transmitting state when, during the vehicle traveling, the two-wheel→four-wheel drive switching request has occurred; vehicle stop detecting means for detecting that the vehicle is being stopped; and stop-time two-wheel→four-wheel drive switching means, responsive to signals from the vehicle stop detecting means and the two-wheel→four-wheel drive switching request detecting means, for directing the traction-transmitting transfer into the transmitting state after the gear clutch is engaged when, during the vehicle stop, the two-wheel→four-wheel switching request has occurred.