DRIVING MODE SWITCHING METHOD OF AN ELECTRIC AUXILIARY TRANSMISSION WITHOUT HUB LOCK APPARATUS USAGE TO IMPROVE THE DURABILITY AND DRIVING PERFORMANCE OF AN AUXILIARY TRANSMISSION

摘要

PURPOSE: A driving mode switching method of an electric auxiliary transmission without hub lock apparatus usage is provided to convert only in case the difference of the rear wheels and front wheels in four wheel driving mode being is in a permission range.;CONSTITUTION: A driving mode switching method of an electric auxiliary transmission without hub lock apparatus usage is as follows. Four wheel driving mode conversion conditions are detected. In case the conditions are satisfied, the driving mode is switched to four wheel driving from two wheel driving(S10). Two wheel driving conversion conditions of an auxiliary transmission are detected. In case the conditions are satisfied, the driving mode of auxiliary transmission is switched to two wheel driving from four wheel driving(S20). The rotation difference of the rear wheels and front wheels in four wheel driving mode is detected. The driving mode conversion of an auxiliary transmission is allowed in case the rotation difference of the rear wheels and front wheels in four wheel driving mode is in a permission range.;COPYRIGHT KIPO 2012