Variable synchronous window

摘要

A control system/method for controlling the shifting of automated mechanical transmission systems (10) is provided. The control system/method (FIG. 4 ) defines the synchronous window ((OS*GRT)+X>/=ISE>(OS*GRT)-Y) for jaw clutch engagement (for shifts other than compound upshifts) where X and Y are each greater than zero and the total synchronous window (X+Y) equals the greater of a function (fGRT) of the numerical value of the target ratio (GRT) or a minimum value ((X+Y) min).